CN103825640B - Sending and receiving methods for demodulation information in MIMO system and related device - Google Patents

Abstract

The embodiment of the present invention discloses a method for sending and receiving demodulation information in a MIMO system and a related device. In the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N types of scrambling code identifications are used. The value distinguishes 2 ^N values of the DM-RS scrambling code sequence on each downlink antenna port, thereby expanding the number of users supported by the MIMO system and fully utilizing the performance advantages of a multi-antenna system with more antennas.

Description

Method for sending and receiving demodulation information in MIMO system and related device

technical field

The present invention relates to the communication field, in particular to a method for sending and receiving demodulation information in a MIMO system and a related device.

Background technique

In current wireless communication systems, such as Long Term Evolution (LTE, Long Term Evolution) and Long Term Evolution-Advanced (LTE-A, Long Term Evolution-Advanced) communication systems, base stations generally use multiple-input multiple-output (MIMO, Multiple Input Multiple Output) technology. Using MIMO technology, multiple parallel spatial channels can be created on the same time-frequency resource, and different data streams can be transmitted independently through these parallel spatial channels, or a data stream can be sent on multiple parallel spatial channels, thereby A compromise between multiplexing and diversity is achieved. Regardless of the use of multiplexing and diversity, it is because MIMO technology provides additional resources and degrees of freedom in the airspace. Theoretical research and engineering practice have fully demonstrated that the use of these resources and degrees of freedom can greatly improve the wireless communication system. the spectral efficiency.

In the tenth version of LTE (LTE Rel-10), the base station is configured with a maximum of 8 physical antennas. Considering the actual channel conditions, LTE Rel-10 can only support a maximum of 4 users in the process of standardization. User MIMO (ie MU-MIMO) is used for system design. In LTE Rel-10, MU-MIMO and single-user MIMO (SU-MIMO) are required to be transparent, that is, a certain UE (such as UE1) cannot know the current downlink control information (DCI, Downlink Control Information) from the received Whether there are other UEs using the same time-frequency resource as UE1 to transmit data. In order to realize the transparency of MU-MIMO and SU-MIMO, LTE Rel-10 uses the downlink antenna port numbers as port7 and port8 to transmit the demodulation reference signal (DM-RS, DemodulationReference Signal) of data, and at the same time combine 1 1-bit scrambling code identifier n _SCID , so that LTE Rel-10 can support MU-MIMO of up to 4 users and 1 layer when using single codeword transmission, and can support up to 2 users and 2 layers of MU when using double codeword transmission -MIMO.

4-user 1-layer MU-MIMO or 2-user 2-layer MU-MIMO is sufficient for base stations in LTE Rel-10 with up to 8 antennas. For more antenna systems (such as an array antenna system with up to 32 physical antennas on the base station side), the number of MU-MIMO users that can be supported above is not enough to take advantage of the performance advantages of the antenna system with more antennas.

Contents of the invention

Various aspects of the present invention provide a method for sending and receiving demodulation information in a MIMO system and a related device, which are used to take advantage of the performance advantages of a multi-antenna antenna system.

In order to solve the above technical problems, the following technical solutions are provided:

The first aspect of the present invention provides a method for sending demodulation information in a MIMO system, including:

The transmitting node obtains the demodulation information of the user equipment UE, where the demodulation information includes: a port identifier used to indicate the downlink antenna port allocated by the transmitting node to the UE for use by the UE, and used to determine a solution on the downlink antenna port The scrambling code identification of the reference signal DM-RS scrambling code sequence, and the number of layers, wherein the above-mentioned transmitting node uses 2 ^N values of the above-mentioned scrambling code identification for at least four downlink antenna ports to distinguish each downlink antenna port 2 ^N values of the above-mentioned DM-RS scrambling code sequence, wherein the above-mentioned N is a natural number;

Acquiring a demodulation indication value indicating the demodulation information;

Send the above-mentioned demodulation indication value to the above-mentioned UE, so that the above-mentioned UE obtains demodulation information according to the above-mentioned demodulation indication value, and assigns the above-mentioned transmitting node corresponding to the above-mentioned port identifier to the downlink antenna port used by the above-mentioned UE according to the obtained demodulation information Demodulate the received data.

With reference to the first aspect of the present invention, in a first possible implementation manner, the acquiring the demodulation indication value indicating the demodulation information includes: acquiring the demodulation indication value from a pre-stored indication table according to the demodulation information.

In combination with the first possible implementation of the first aspect of the present invention, in the second possible implementation, the above-mentioned pre-stored instruction table includes: a single-codeword instruction table and a double-codeword instruction table;

Before obtaining the above-mentioned demodulation indication value from the pre-stored indication table according to the above-mentioned demodulation information, it includes:

judging whether the transmitting node uses single-codeword transmission or dual-codeword transmission for the UE;

The above-mentioned demodulation indication value is obtained from the pre-stored indication table according to the above-mentioned demodulation information, including:

If the above-mentioned transmitting node uses single codeword transmission for the above-mentioned UE, then:

Acquiring the above-mentioned demodulation indication value from the above-mentioned single codeword indication table according to the above-mentioned demodulation information;

If the above-mentioned transmitting node uses dual-codeword transmission for the above-mentioned UE, then:

The demodulation indication value is acquired from the dual codeword indication table according to the demodulation information.

In combination with the second possible implementation of the first aspect of the present invention, in the third possible implementation, the demodulation indication value contained in the above-mentioned single-codeword indication table contains 16 values, and the above-mentioned single-codeword indication table contains The 16 numerical values correspond to the following 16 types of information:

The number of layers is 1, the port ID is port7, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port7, and the scrambling code ID is 1;

The number of layers is 1, the port ID is por8, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port8, and the scrambling code ID is 1;

The number of layers is 1, the port ID is port9, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port9, and the scrambling code ID is 1;

The number of layers is 1, the port ID is port10, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port10, and the scrambling code ID is 1;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1.

In combination with the second possible implementation of the first aspect of the present invention or the third possible implementation of the first aspect, in a fourth possible implementation, the above N is equal to 1;

The demodulation indication value contained in the above-mentioned double code word indication table is 16 numerical values, and the 16 numerical values in the above-mentioned double code word indication table correspond to the following 16 kinds of information one by one:

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1;

The number of layers is 2, the port ID is por9-10, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1;

The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 0;

The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 1;

The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 0;

The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 1;

The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 0;

The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 1;

The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 0;

The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 1.

In combination with the first aspect of the present invention, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, or the fourth possible implementation of the first aspect, in the fifth In a possible implementation, after the demodulation information of the user equipment UE is acquired above,

If the number of downlink antenna ports allocated by the transmitting node to the UE is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, and the time-frequency occupied by the downlink antenna ports whose number is greater than 1 resources are the same, the above method also includes:

Judging whether it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the above-mentioned UE, where the time-frequency resources occupied by the above-mentioned other downlink antenna ports are different from the time-frequency resources occupied by the above-mentioned downlink antenna ports. The resource element RE occupied on the domain is different;

If it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the above UE, then:

performing rate matching on the time-frequency resources occupied by the other downlink antenna ports above for the downlink data channel of the UE;

Sending the first reservation indication information to the UE, where the first reservation indication information is used to indicate to the UE that the transmitting node has performed the downlink data channel of the UE on the time-frequency resources occupied by the other downlink antenna ports. rate matching.

In combination with the fifth possible implementation manner of the first aspect of the present invention, in a sixth possible implementation manner, the above method further includes:

If it is not necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the above-mentioned UE, then send the second reservation indication information to the above-mentioned UE, wherein the above-mentioned second reservation indication information is used to send the above-mentioned The UE instructs the transmitting node not to perform rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the UE.

With reference to the fifth possible implementation of the first aspect of the present invention or the sixth possible implementation of the first aspect of the present invention, in a seventh possible implementation, the sending of the first reservation indication information to the UE includes: :

Sending the first reservation indication information to the UE through downlink control information DCI or a radio resource control RRC message.

In combination with the first aspect of the present invention, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, or, the first In the fourth possible implementation manner of the aspect, in the eighth possible implementation manner, after the demodulation information of the user equipment UE is obtained above,

If the number of downlink antenna ports allocated by the transmitting node to the UE is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, and the time-frequency occupied by the downlink antenna ports whose number is greater than 1 resources are the same, the above method also includes:

performing rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the UE, wherein the time-frequency resources occupied by the other downlink antenna ports and the time-frequency resources occupied by the above-mentioned downlink antenna ports are occupied in the frequency domain The resource element RE is different.

In combination with the first aspect of the present invention, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, or the third possible implementation of the first aspect, or, the first Four possible implementations of the first aspect, or a fifth possible implementation of the first aspect, or a sixth possible implementation of the first aspect, or a seventh possible implementation of the first aspect, or, An eighth possible implementation of the first aspect, in a ninth possible implementation, the sending the demodulation indication value to the UE includes:

Send the acquired demodulation indication value to the above-mentioned UE by using a DCI or RRC message with a size not smaller than 4 bits.

The second aspect of the present invention provides a method for receiving demodulated information in a MIMO system, including:

The user equipment UE receives the demodulation indication value from the transmitting node;

Obtain demodulation information corresponding to the demodulation indication value according to the demodulation indication value, where the demodulation information includes: a port identifier used to indicate that the transmitting node allocates to the UE a port identifier corresponding to the downlink antenna port used by the UE, and using To determine the scrambling code identification and the number of layers of the demodulation reference signal DM-RS scrambling code sequence on the downlink antenna port, wherein the above-mentioned transmitting node uses 2 ^N values of the above-mentioned scrambling code identification for at least four downlink antenna ports Separately distinguish 2 ^N values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port, wherein the above-mentioned N is a natural number;

Demodulate the received data on the downlink antenna port allocated to the UE by the transmitting node corresponding to the port identifier according to the acquired demodulation information.

In combination with the second aspect of the present invention, in a first possible implementation manner, the acquisition of the demodulation information corresponding to the above demodulation indication value according to the above demodulation indication value includes:

According to the demodulation indication value, demodulation information corresponding to the demodulation indication value is obtained from a pre-stored indication table.

With reference to the first possible implementation of the second aspect of the present invention, in the second possible implementation, the above-mentioned pre-stored instruction table includes: a single-codeword instruction table and a double-codeword instruction table;

Before obtaining the demodulation information corresponding to the above-mentioned demodulation indication value from the pre-stored indication table according to the above-mentioned demodulation indication value, including:

Judging whether the above-mentioned transmitting node currently uses single-codeword transmission or double-codeword transmission for the above-mentioned UE;

According to the above-mentioned demodulation indication value, the demodulation information corresponding to the above-mentioned demodulation indication value is obtained from the pre-stored indication table, including:

If the above-mentioned transmitting node uses single codeword transmission for the above-mentioned UE, then:

Obtain demodulation information corresponding to the demodulation indication value from the single codeword indication table according to the demodulation indication value;

If the above-mentioned transmitting node uses dual-codeword transmission for the above-mentioned UE, then:

According to the demodulation indication value, the demodulation information corresponding to the demodulation indication value is acquired from the dual codeword indication table.

In combination with the second possible implementation manner of the second aspect of the present invention, in the third possible implementation manner, the above N is equal to 1;

The demodulation indication value contained in the above-mentioned single code word indication table is 16 numerical values, and the 16 numerical values in the above-mentioned single code word indication table correspond to the following 16 kinds of information one by one:

The number of layers is 1, the port ID is port7, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port7, and the scrambling code ID is 1;

The number of layers is 1, the port ID is por8, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port8, and the scrambling code ID is 1;

The number of layers is 1, the port ID is port9, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port9, and the scrambling code ID is 1;

The number of layers is 1, the port ID is port10, and the scrambling code ID is 0;

The number of layers is 1, the port ID is port10, and the scrambling code ID is 1;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1.

In combination with the second possible implementation manner of the second aspect of the present invention, or, the third possible implementation manner of the second aspect, in the fourth possible implementation manner, the above N is equal to 1;

The demodulation indication value contained in the above-mentioned double code word indication table is 16 numerical values, and the 16 numerical values in the above-mentioned double code word indication table correspond to the following 16 kinds of information one by one:

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1;

The number of layers is 2, the port ID is por9-10, and the scrambling code ID is 0;

The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0;

The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0;

The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1;

The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 0;

The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 1;

The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 0;

The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 1;

The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 0;

The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 1;

The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 0;

The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 1.

In combination with the second aspect of the present invention, or the second possible implementation of the second aspect, or the third possible implementation of the second aspect, or the fourth possible implementation of the second aspect, in the In five possible implementation manners, after obtaining the demodulation information corresponding to the demodulation indication value according to the demodulation indication value,

The above method also includes:

If the first reservation indication information from the transmitting node is received, rate matching is performed on the downlink data channel of the UE on the time-frequency resources occupied by other downlink antenna ports, wherein the first reservation indication information is used to send The above-mentioned UE instructs the above-mentioned transmitting node to perform rate matching on the time-frequency resources occupied by the above-mentioned other downlink antenna ports on the downlink data channel of the above-mentioned UE. Resource elements occupied by resources in the frequency domain are different.

In combination with the second aspect of the present invention, or the second possible implementation of the second aspect, or, the third possible implementation of the second aspect, or the fourth possible implementation of the second aspect, or the first In the fifth possible implementation of the second aspect, in the sixth possible implementation, after obtaining the demodulation information corresponding to the demodulation indication value according to the demodulation indication value, the above method further includes:

receiving second reservation indication information from the transmitting node, wherein the second reservation indication information is used to indicate to the UE that the transmitting node does not have time and frequency occupied by the UE's downlink data channel on the other downlink antenna port Rate matching is performed on resources.

A third aspect of the present invention provides a transmitting node, including:

The first obtaining unit is configured to obtain the demodulation information of the user equipment UE, wherein the demodulation information includes: a port identifier used to indicate the port identifier corresponding to the downlink antenna port allocated by the transmitting node to the UE, and used to determine the downlink The scrambling code identification of the demodulation reference signal DM-RS scrambling code sequence on the antenna port, and the number of layers, wherein, for at least four downlink antenna ports, the above-mentioned transmitting node uses 2 ^N values of the above-mentioned scrambling code identification to distinguish each 2 ^N kinds of values of the above-mentioned DM-RS scrambling code sequence on the downlink antenna ports, wherein the above-mentioned N is a natural number;

The second obtaining unit is configured to obtain a demodulation indication value indicating the demodulation information obtained by the first obtaining unit;

A sending unit, configured to send the demodulation indication value obtained by the second obtaining unit to the UE, so that the UE obtains demodulation information according to the demodulation indication value, and identifies the corresponding above-mentioned The transmitting node performs demodulation processing on the received data on the downlink antenna port allocated to the above-mentioned UE.

In combination with the third aspect of the present invention, in a first possible implementation manner,

The above-mentioned second obtaining unit is specifically configured to: obtain the above-mentioned demodulation instruction value from a pre-stored instruction table according to the above-mentioned demodulation information.

In combination with the first possible implementation of the third aspect of the present invention, in the second possible implementation, the above-mentioned pre-stored instruction table includes: a single-codeword instruction table and a double-codeword instruction table;

The above-mentioned transmitting node also includes:

A first judging unit, configured to judge whether the transmitting node uses single-codeword transmission or dual-codeword transmission for the UE;

The above-mentioned second obtaining unit is specifically configured to: when the above-mentioned first judging unit judges that the above-mentioned transmitting node uses a single codeword for transmission to the above-mentioned UE, obtain the above-mentioned demodulation indication value from the above-mentioned single codeword indication table according to the above-mentioned demodulation information ; when the first judging unit judges that the transmitting node uses dual-codeword transmission for the UE, acquire the demodulation indication value from the dual-codeword indication table according to the demodulation information.

In combination with the third aspect of the present invention, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in the third possible implementation manner, the transmitting node further includes: Two judging unit and rate matching unit;

The second judging unit is used for: when the number of downlink antenna ports allocated by the transmitting node to the UE is 1, or the number of downlink antenna ports allocated by the transmitting node to the UE is greater than 1, and the number is greater than 1 When the time-frequency resources occupied by the downlink antenna ports are the same, determine whether it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the above-mentioned UE, wherein the time-frequency resources occupied by the other downlink antenna ports It is different from the resource element RE occupied in the frequency domain by the time-frequency resource occupied by the above-mentioned transmitting node allocated to the above-mentioned downlink antenna port;

The above-mentioned rate matching unit is used for: when the above-mentioned second judging unit judges that the downlink data channel of the above-mentioned UE needs to be rate-matched on time-frequency resources occupied by other downlink antenna ports, the downlink data channel of the above-mentioned UE on the above-mentioned other downlink Perform rate matching on the time-frequency resources occupied by the antenna port;

The above-mentioned sending unit is further configured to send the first reservation instruction information to the above-mentioned UE when the above-mentioned second judging unit judges that the downlink data channel of the above-mentioned UE needs to perform rate matching on the time-frequency resources occupied by other downlink antenna ports, wherein The first reservation indication information is used to indicate to the UE that the transmitting node performs rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the UE.

In combination with the third possible implementation of the third aspect of the present invention, in the fourth possible implementation, when the second judging unit judges that there is no need to occupy the downlink data channel of the UE on other downlink antenna ports When rate matching is performed on frequency resources, the second reservation indication information is sent to the UE, wherein the second reservation indication information is used to indicate to the UE that the transmitting node does not use the UE's downlink data channel in the other downlink Rate matching is performed on the time-frequency resources occupied by the antenna ports.

In combination with the third possible implementation of the third aspect of the present invention, or the fourth possible implementation of the third aspect of the present invention, in a fifth possible implementation, the sending unit is specifically configured to: through downlink control The information DCI or the radio resource control RRC message sends the above-mentioned first reservation indication information to the above-mentioned UE.

With reference to the third aspect of the present invention, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a sixth possible implementation manner, the transmitting node further includes: matching unit;

The rate matching unit is used for: when the number of downlink antenna ports allocated by the transmitting node to the UE is 1, or the number of downlink antenna ports allocated by the transmitting node to the UE is greater than 1, and the number is greater than 1 When the time-frequency resources occupied by the downlink antenna ports are all the same, rate matching is performed on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the above UE, wherein the time-frequency resources occupied by the other downlink antenna ports are the same as those of the transmitting node The time-frequency resources occupied by the above-mentioned downlink antenna ports occupy different resource elements RE in the frequency domain.

In combination with the third aspect of the present invention, or the first possible implementation of the third aspect, or the second possible implementation of the third aspect, or the third possible implementation of the third aspect, or the third aspect In the fourth possible implementation of the third aspect, or in the fifth possible implementation of the third aspect, or in the sixth possible implementation of the third aspect, in the seventh possible implementation, the sending unit specifically uses For: sending the demodulation indication value obtained by the second obtaining unit to the UE by using DCI or RRC with a size not smaller than 4 bits.

A fourth aspect of the present invention provides a user equipment, including:

a receiving unit, configured to receive a demodulation indication value from a transmitting node;

The acquiring unit is configured to acquire demodulation information corresponding to the demodulation indication value according to the demodulation indication value received by the receiving unit, wherein the demodulation information includes: used to instruct the transmitting node to allocate to the user equipment for use The port identification corresponding to the downlink antenna port is used to determine the scrambling code identification of the demodulation reference signal DM-RS scrambling code sequence on the downlink antenna port, and the number of layers, wherein the above-mentioned transmitting node uses at least four downlink antenna ports The 2 ^N kinds of values of the above-mentioned scrambling code identifier respectively distinguish the 2 ^N kinds of values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port, wherein the above-mentioned N is a natural number;

The demodulation processing unit is configured to demodulate the received data on the downlink antenna port allocated to the UE by the transmitting node corresponding to the port identifier according to the demodulation information obtained by the obtaining unit.

In combination with the fourth aspect of the present invention, in a first possible implementation manner, the above-mentioned acquisition unit is specifically configured to: acquire the demodulation indication value corresponding to the above-mentioned demodulation indication value from a pre-stored indication table according to the demodulation indication value received by the above-mentioned receiving unit. demodulation information.

In combination with the first possible implementation of the fourth aspect of the present invention, in the second possible implementation, the above-mentioned pre-stored instruction table includes: a single codeword instruction table and a double codeword instruction table;

The above user equipment also includes:

A judging unit, configured to judge whether the above-mentioned transmitting node currently uses single-codeword transmission or double-codeword transmission for the above-mentioned UE;

The acquiring unit is specifically configured to: when the judging unit judges that the transmitting node uses a single codeword for transmission to the user equipment, according to the demodulation indication value, acquire the demodulation indication value corresponding to the demodulation indication value from the single codeword indication table Corresponding demodulation information; when the judging unit judges that the transmitting node uses dual codewords for transmission to the user equipment, according to the demodulation indication value, obtain the information corresponding to the demodulation indication value from the dual codeword indication table demodulation information.

In combination with the fourth aspect of the present invention, or the first possible implementation of the fourth aspect, or the second possible implementation of the fourth aspect, in a third possible implementation, the above receiving unit is further configured to receive the The first reservation indication information of the transmitting node, wherein the first reservation indication information is used to indicate to the user equipment that the transmitting node uses time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the user equipment. rate matching, wherein the time-frequency resources occupied by the other downlink antenna ports are different from the resource elements RE occupied in the frequency domain by the time-frequency resources occupied by the above-mentioned transmitting node allocated to the above-mentioned downlink antenna ports;

The above user equipment also includes:

A rate matching unit, configured to perform rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the user equipment when the receiving unit receives the first reservation indication information.

In combination with the fourth aspect of the present invention, or the first possible implementation of the fourth aspect, or the second possible implementation of the fourth aspect, in a fourth possible implementation, the receiving unit is further configured to:

receiving second reservation indication information from the transmitting node, wherein the second reservation indication information is used to indicate to the UE that the transmitting node does not have time and frequency occupied by the UE's downlink data channel on the other downlink antenna port Rate matching is performed on resources.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifier are used to distinguish the above-mentioned demodulation reference signal (DM-RS, DemodulationReference Signal) scrambling code sequence 2 ^N values, thereby expanding the number of users supported by the MIMO system, and can give full play to the performance advantages of the multi-antenna system with more antennas.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic flowchart of an embodiment of a method for sending demodulation information in a MIMO system provided by the present invention;

FIG. 2 is a schematic flowchart of an embodiment of a method for receiving demodulation information in a MIMO system provided by the present invention;

FIG. 3 is a schematic diagram of a downlink resource block of a conventional subframe in LTE Rel-10 provided by the present invention;

FIG. 4 is a schematic structural diagram of an embodiment of a transmitting node provided by the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a user equipment provided by the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of a transmitting node provided by the present invention;

Fig. 7 is a schematic structural diagram of another embodiment of user equipment provided by the present invention.

detailed description

Embodiments of the present invention provide a method for sending and receiving demodulation information in a MIMO system and a related device.

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, various other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

The following describes a method for sending demodulation information in a multiple-input multiple-output system provided by an embodiment of the present invention with the transmitting node as the main body of description. Please refer to FIG. The method of sending call information, including:

101. The transmitting node acquires demodulation information of the UE;

Wherein, the above-mentioned demodulation information includes: used to indicate the port identifier corresponding to the downlink antenna port allocated by the above-mentioned transmitting node to the above-mentioned UE, and used to determine the scrambling code identifier of the DM-RS scrambling code sequence on the downlink antenna port, and The number of layers, wherein, for at least four downlink antenna ports, the transmitting node uses 2 ^N values of the scrambling code identifier to distinguish 2 ^N values of the DM-RS scrambling code sequence on each downlink antenna port, Wherein, the above-mentioned N is a natural number.

In practical applications, the transmitting node can determine the port identification, layer number, scrambling code identification and other information related to the DM-RS of the above-mentioned UE according to the actual allocation of all local downlink antenna ports, and finally obtain the demodulation information of the above-mentioned UE. Alternatively, the demodulation information of the above-mentioned UE may also be manually input and configured on the above-mentioned transmitting node through a command line or in other ways, so that the transmitting node obtains the demodulation information of the above-mentioned UE, which is not limited herein.

The number of layers (that is, layer) in the embodiment of the present invention is the number of spatial parallel channels used by the multi-antenna system when the spatial channel transmits data independently. For example, when the number of layers is 1, or 1 layer, it means that when the multi-antenna system transmits in space, there is only one independent channel from the transmitter to the receiver; when the number of layers is 2 or 2 layers, it means that multiple When the antenna system transmits in space, there are two parallel space channels from the transmitter to the receiver. In actual wireless communication transmission, the actual number of layers used cannot exceed the maximum number of layers that the current wireless channel can support, and the maximum number of spatial layers that a wireless channel can support depends on the number of transmitting and receiving antennas, the configuration of the antennas, and the transmission time. Channel environment and other factors.

102. Acquire a demodulation indication value indicating the demodulation information;

In the embodiment of the present invention, after acquiring the demodulation information of the UE, the transmitting node acquires a demodulation indication value according to the demodulation information.

In one embodiment, each combination of the port identifier, the scrambling code identifier, and the number of layers corresponds to a different demodulation indicator value, and after obtaining the demodulation information in step 101, the transmitting node can according to the demodulation The port ID, scrambling code ID and layer number in the information can be used to obtain a corresponding demodulation indicator value. In practical applications, the indicator table can be stored locally at the transmitting node in advance. The indicator table includes: port ID, scrambling code ID And the combination of the three values of the number of layers, and the correspondence relationship information with the demodulation indication value. The transmitting node obtains a corresponding demodulation indication value from the pre-stored indication table according to the port identification, scrambling code identification and layer number in the demodulation information.

Since the combination of the port identifier, the scrambling code identifier, and the number of layers may be the same in the single-codeword transmission mode and the double-codeword transmission mode, the present invention can also divide the indication table into: single codeword indication table and double code word indication table, and in the single code word indication table and double code word indication table respectively, a combination of the values of the port identification, the scrambling code identification and the number of layers corresponds to a demodulation indication value, that is, the combination of the port identifier, the scrambling code identifier, and the number of layers is in one-to-one correspondence with the demodulation indication value. In this scenario, the single-codeword indication table and the double-codeword indication table may contain the same demodulation indication value. Then, before the transmitting node acquires the demodulation indication value indicating the above-mentioned demodulation information, it needs to judge whether the above-mentioned transmitting node uses single-codeword transmission or double-codeword transmission for the above-mentioned UE. In practical applications, the above-mentioned UE uses single-codeword transmission. Whether word transmission or double code word transmission can be decided by the scheduler in the transmitting node. If it is single-codeword transmission, then according to the port identifier, scrambling code identifier and layer number in the demodulation information above, obtain a corresponding demodulation indicator value from the single-codeword indication table; if it is double-codeword transmission, then according to the above solution The port identifier, the scrambling code identifier and the number of layers in the modulation information are used to obtain a corresponding demodulation indication value from the dual code word indication table.

Of course, the transmitting node can also obtain the demodulation indication value indicating the above-mentioned demodulation information in other ways, for example, it can be obtained from other transmitting nodes or network devices connected to it, or the transmitting node can communicate with the cloud platform to obtain the demodulation value from the cloud platform. The demodulation indication value indicating the above demodulation information is acquired on the platform, which is not limited here.

103. Send the acquired demodulation indication value to the UE;

The transmitting node sends the demodulation indication value obtained in step 102 to the above-mentioned UE, so that the above-mentioned UE obtains demodulation information according to the above-mentioned demodulation indication value, and decodes the received data on the corresponding downlink antenna port according to the obtained demodulation information. tune processing.

In one embodiment, the transmitting node may use a downlink control information (DCI, Downlink Control Information) or a radio resource control (RRC, Radio Resource Control) message of not less than 4 bits to send the obtained demodulation indication value to the aforementioned UE Of course, the transmitting node may also send the acquired demodulation indication value to the UE by extending other existing signaling or newly adding signaling, which is not limited herein.

Further, when the number of downlink antenna ports allocated by the transmitting node to the above-mentioned UE (for ease of understanding, referred to as UE1 below) is 1, or the number of downlink antenna ports allocated by the above-mentioned transmitting node to UE1 is greater than 1, and the above-mentioned When the time-frequency resources occupied by all the downlink antenna ports used by UE1 allocated by the transmitting node are the same, whether it needs to be used for other downlink antenna ports (for ease of description and understanding, the occupied time-frequency resources The time-frequency resources occupied in the frequency domain (RE, Resource Element) different downlink antenna ports are called other downlink antenna ports) for rate matching. The rate matching here means that the bits on the transmission channel are Hole, to match the carrying capacity of the physical channel, so that the bit rate required by the transmission format is reached during channel mapping. Usually, no data is sent or data is stopped on the time-frequency resource occupied by the reference signal corresponding to the transmission channel. In the subsequent embodiments Rate matching has a similar meaning. For example, suppose the number of information bits to be sent is Ninf, and the number of bits after channel coding according to the selected code rate is Ncde. According to a certain modulation level, Msym REs are required to transmit the Ncde coded bits. Data bits, but under certain transmission conditions, only (Msym-Mpun) REs can be allocated to the UE, that is to say, some coded bits cannot fit. When the encoder encounters this situation, it will not reduce the transmission Under the condition of the number of information bits Ninf, the number of encoded bits is reduced, that is, the above-mentioned not small part of the encoded bits is punched out to reduce Ncde. There are two situations here. One is that when other downlink antenna ports are not allocated to other UEs (for ease of understanding, referred to as UE2 below), the positions of time-frequency resources occupied by other downlink antenna ports will be used to transmit UE1 downlink data. Another situation is: when other downlink antenna ports are allocated to UE2, the positions of the time-frequency resources occupied by other downlink antenna ports cannot be used to transmit UE1's downlink data, but need to be reserved for UE2's DM-RS . In order to solve the above problems, the embodiment of the present invention provides the following two implementation modes:

In one implementation, when the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and all the downlink antenna ports allocated by the transmitting node to UE1 are When the time-frequency resources occupied by the antenna ports are the same, the transmitting node judges whether it is necessary to rate the UE1’s downlink data channel (such as a Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel)) on the time-frequency resources occupied by other downlink antenna ports. Matching (that is, punching), if necessary, perform rate matching on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel of UE1, and send the first reservation indication information to UE1, wherein the first reservation The reserved indication information is used to indicate to UE1 that the above-mentioned transmitting node has performed rate matching on the time-frequency resources occupied by the other downlink antenna ports of the UE1's downlink data channel, and if not needed, send the second reserved indication information to UE1, wherein The second reservation indication information is used to indicate to UE1 that the transmitting node does not perform rate matching on time-frequency resources occupied by other downlink antenna ports for the downlink data channel of UE1. In the embodiment of the present invention, the basis for the transmitting node to determine whether to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for UE1's downlink data channel is to determine whether other downlink antenna ports are allocated to UE2. If the port is allocated to UE2, it is determined that UE1’s downlink data channel needs to be rate matched on the time-frequency resources occupied by other downlink antenna ports. If other downlink antenna ports are not allocated to UE2, it is determined that UE1’s downlink data channel does not need to be adjusted. The channel performs rate matching on the time-frequency resources occupied by other downlink antenna ports. Further, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information may be DCI or RRC messages, for example, new DCI or RRC signaling may be used for indication, or existing signaling may be used for piggybacking, If the new data indicator (NDI, New DataIndicator) parameter in the DCI signaling is used to piggyback the first reservation indicator or the second reservation indicator, the length of the NDI is 1 bit. Under normal circumstances, the NDI is It is used to indicate whether the data transmitted by each code block is newly transmitted data or old transmitted data in the downlink transmission. The embodiment of the present invention uses this 1 bit to further indicate the reservation to UE1. For example, if it is necessary to send the above-mentioned first When reserving indication information, set the value of NDI to 1, and set the value of NDI to 0 when the above-mentioned second reservation indication information needs to be sent to UE1. Of course, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information in this embodiment of the present invention may also be other extended signaling or newly added signaling, which is not limited here.

In this embodiment and subsequent embodiments, rate matching or puncturing is performed on time-frequency resources occupied by other downlink antenna ports, that is, no data is sent or transmission is stopped on time-frequency resources occupied by reference signals corresponding to other downlink antenna ports data.

In another implementation, it is defined that when the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and the number of downlink antenna ports allocated by the transmitting node to UE1 is When the time-frequency resources occupied by all downlink antenna ports are the same, regardless of whether other downlink antenna ports are used by UE2, other downlink antenna ports are used by UE2 by default, that is, as long as the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or, when the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and all the downlink antenna ports allocated by the transmitting node to UE1 occupy the same time-frequency resources, the transmitting node will use the downlink data channel of UE1 in other Rate matching is performed on the time-frequency resources occupied by the downlink antenna ports.

It should be noted that the transmitting node in the embodiment of the present invention may be an evolved base station (eNB, evolvedNode B), a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifiers are used to distinguish the above-mentioned 2 ^N types of DM-RS scrambling code sequences on each downlink antenna port. value, thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

The UE is used as the subject of description below to describe a method for receiving demodulation information in a MIMO system provided by an embodiment of the present invention. Please refer to FIG. 2 , the demodulation in a MIMO system in an embodiment of the present invention Methods of receiving information, including:

201. The UE receives a demodulation indication value from the transmitting node;

In one embodiment, the transmitting node uses a DCI or RRC message with a size of not less than 4 bits to send the demodulation indication value to the UE, and the UE parses the above-mentioned demodulation indication value from the DCI or RRC message carrying the demodulation indication value. Demodulate the indicated value. Of course, in practical applications, the demodulation indication value may also be carried in other extended signaling or newly added signaling, which is not limited here.

202. Acquire corresponding demodulation information according to the demodulation indication value;

Wherein, the above-mentioned demodulation information includes: used to indicate the port identifier corresponding to the downlink antenna port allocated by the above-mentioned transmitting node to the above-mentioned UE, and used to determine the scrambling code identifier of the DM-RS scrambling code sequence on the downlink antenna port, and The number of layers, wherein the transmitting node uses the 2 ^N values of the scrambling code identifier to distinguish the 2 ^N values of the DM-RS scrambling code sequence on each downlink antenna port for at least four downlink antenna ports.

In one embodiment, each combination of the port identifier, the scrambling code identifier, and the number of layers corresponds to a different demodulation indicator value. After obtaining the demodulation indicator value in step 201, the UE can The indication value is used to obtain the corresponding demodulation information. In practical applications, the indication table can be stored locally in the transmitting node in advance. The indication table includes: the combination of port identification, scrambling code identification and layer number, and Correspondence information of the demodulation indication value. According to the acquired demodulation indication value, the UE acquires the corresponding port ID, scrambling code ID and layer number from the pre-stored indication table, so as to obtain the corresponding demodulation information.

Since the combination of the port identifier, the scrambling code identifier, and the number of layers may be the same in the single-codeword transmission mode and the double-codeword transmission mode, the present invention can also divide the indication table into: single codeword indication table and double code word indication table, and in the single code word indication table and double code word indication table respectively, a combination of the values of the port identification, the scrambling code identification and the number of layers corresponds to a demodulation indication value, that is, the combination of the port identifier, the scrambling code identifier, and the number of layers is in one-to-one correspondence with the demodulation indication value. In this scenario, the single-codeword indication table and the double-codeword indication table may contain the same demodulation indication value. Then, before the transmitting node obtains the corresponding port ID, scrambling code ID, and layer number according to the demodulation indication value, it needs to judge whether the transmitting node uses single codeword transmission or double codeword transmission for the UE. If it is single codeword transmission, Then according to the demodulation indication value obtained in step 201, the corresponding port identification, scrambling code identification and layer number are obtained from the above-mentioned single code word indication table. , and obtain the corresponding port identifier, scrambling code identifier and layer number from the above-mentioned dual codeword indication table.

Of course, the UE can also obtain the port ID, scrambling code ID, and layer number corresponding to the demodulation indication value in other ways. For example, the UE can obtain the port ID corresponding to the demodulation indication value, The scrambling code identifier and the number of layers, or the port identifier, the scrambling code identifier and the number of layers corresponding to the demodulation indication value can be obtained from the cloud platform by communicating with the cloud platform, which is not limited here.

It should be noted that, in practical applications, each codeword is assigned a 5-bit DCI signaling to indicate to the UE the relevant information of the code block corresponding to the codeword. Therefore, if the DCI received by the UE There is only one code block information indication in the signaling, which indicates that the above-mentioned transmitting node uses a single code word transmission for the above-mentioned UE, and if there are two code block information indications in the DCI signaling received by the UE, it indicates that the above-mentioned transmitting node Dual-codeword transmission is used for the above UE.

The number of layers (that is, layer) in the embodiment of the present invention is the number of spatial parallel channels used by the multi-antenna system when the spatial channel transmits data independently. For example, when the number of layers is 1, or 1 layer, it means that when the multi-antenna system transmits in space, there is only one independent channel from the transmitter to the receiver; when the number of layers is 2 or 2 layers, it means that multiple When the antenna system transmits in space, there are two parallel space channels from the transmitter to the receiver. In actual wireless communication transmission, the actual number of layers used cannot exceed the maximum number of layers that the current wireless channel can support, and the maximum number of spatial layers that a wireless channel can support depends on the number of transmitting and receiving antennas, the configuration of the antennas, and the transmission time. Channel environment and other factors.

203. The UE demodulates the received data on the downlink antenna port corresponding to the port identifier according to the obtained demodulation information.

Further, when the number of downlink antenna ports allocated by the transmitting node to the above-mentioned UE (for ease of understanding, referred to as UE1 below) is 1, or the number of downlink antenna ports allocated by the above-mentioned transmitting node to UE1 is greater than 1, and the above-mentioned When the time-frequency resources occupied by all the downlink antenna ports allocated by the transmitting node to UE1 are the same, whether it needs to be used for other downlink antenna ports (for ease of description and understanding, the occupied time-frequency resources and The time-frequency resources occupied by the downlink antenna port are rate-matched on the downlink antenna ports occupied by different REs in the frequency domain (called other downlink antenna ports). The rate matching here means that the bits on the transmission channel are punctured to Match the carrying capacity of the physical channel so that the bit rate required by the transmission format can be reached during channel mapping. There are two situations here. One is that when other downlink antenna ports are not allocated to other UEs (for ease of understanding, referred to as UE2 below), the positions of time-frequency resources occupied by other downlink antenna ports will be used to transmit UE1 downlink data. Another situation is: when other downlink antenna ports are allocated to UE2, the positions of the time-frequency resources occupied by other downlink antenna ports cannot be used to transmit UE1's downlink data, but need to be reserved for UE2's DM-RS . In order to solve the above problems, the embodiment of the present invention provides the following two implementation modes:

In one implementation, when the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and all the downlink antenna ports allocated by the transmitting node to UE1 are When the time-frequency resources occupied by the antenna ports are the same, the transmitting node judges whether it is necessary to perform rate matching (that is, punching) on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel (such as PDSCH) of UE1. If necessary, then performing rate matching on the downlink data channel of UE1 on time-frequency resources occupied by other downlink antenna ports, and sending first reservation indication information to UE1, wherein the first reservation indication information is used to indicate to UE1 that the above-mentioned transmitting node Perform rate matching on the downlink data channel of UE1 on the time-frequency resources occupied by the above-mentioned other downlink antenna ports, if not needed, send second reservation indication information to UE1, wherein the above-mentioned second reservation indication information is used to send UE1 indicates that the transmitting node does not perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of UE1. When UE1 receives the first reservation indication information from the transmitting node, the downlink data channel of UE1 The channel performs rate matching on the time-frequency resources occupied by the above-mentioned other downlink antenna ports. In the embodiment of the present invention, the basis for the transmitting node to determine whether to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for UE1's downlink data channel is to determine whether other downlink antenna ports are allocated to UE2. If the port is allocated to UE2, it is determined that UE1’s downlink data channel needs to be rate matched on the time-frequency resources occupied by other downlink antenna ports. If other downlink antenna ports are not allocated to UE2, it is determined that UE1’s downlink data channel does not need to be adjusted. The channel performs rate matching on the time-frequency resources occupied by other downlink antenna ports. Further, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information may be DCI or RRC messages, for example, new DCI or RRC signaling may be used for indication, or existing signaling may be used for piggybacking , if the NDI parameter in DCI signaling is used to piggyback the first reservation indication information or the second reservation indication information, the length of NDI is 1 bit, and under normal circumstances, NDI is used to indicate that in downlink transmission , whether the data transmitted by each code block is newly transmitted data or old transmitted data, the embodiment of the present invention uses this 1 bit to further indicate the reservation to UE1, for example, when the above-mentioned first reservation indication information needs to be sent to UE1, the The value of NDI is set to 1, and the value of NDI is set to 0 when the above-mentioned second reservation indication information needs to be sent to UE1. Of course, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information in this embodiment of the present invention may also be other extended signaling or newly added signaling, which is not limited here.

In another implementation, it is defined that when the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and the number of downlink antenna ports allocated by the transmitting node to UE1 is When the time-frequency resources occupied by all downlink antenna ports are the same, regardless of whether other downlink antenna ports are used by UE2, other downlink antenna ports are used by UE2 by default, that is, as long as the number of downlink antenna ports allocated by the transmitting node to UE1 is 1, or, when the number of downlink antenna ports allocated by the transmitting node to UE1 is greater than 1, and all the downlink antenna ports allocated by the transmitting node to UE1 occupy the same time-frequency resources, the transmitting node will use the downlink data channel of UE1 in other Rate matching is performed on the time-frequency resources occupied by the downlink antenna ports. When UE1 finds that the number of downlink antenna ports allocated to UE1 by the transmitting node is 1 according to the acquired demodulation information, or the number of downlink antenna ports allocated by the transmitting node to UE1 is When the number is greater than 1, and the time-frequency resources occupied by all downlink antenna ports allocated by the transmitting node to UE1 are the same, UE1 performs rate matching on the time-frequency resources occupied by the above-mentioned other downlink antenna ports for the downlink data channel of UE1.

It should be noted that, the transmitting node in the embodiment of the present invention may be an eNB, a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifiers are used to distinguish the above-mentioned 2 ^N types of DM-RS scrambling code sequences on each downlink antenna port. value, thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

The method for sending demodulation information in the MIMO system and the method for receiving demodulation information in the MIMO system in the embodiments of the present invention are described below by taking a specific application scenario as an example.

First, in the current LTE Rel-10 system specification, the antenna ports whose antenna port numbers are port7 to port14 are used as the downlink antenna ports of the DM-RS of the dedicated pilot. As shown in Figure 3, the downlink resource block (RB, Resource Block) of a regular subframe in LTERel-10 includes the pattern position of the cell-specific reference signal (CRS, Cell-specificReference Signal) and the antenna port port7~14 The time-frequency position occupied by the downlink DM-RS, and the blank part is used to transmit the PDSCH. It can be seen from Figure 3 that an RB includes 2 time slots (referred to as slot1 and slot2 respectively), each time slot occupies a time length of 500 microseconds (ie us), and slot1 and slot2 each have 7 equal-length orthogonal Frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) symbols are numbered 0~6 in the left column and 0~6 in the right column in Figure 3, respectively. Wherein, each OFDM symbol occupies resource elements (RE, ResourceElement) of 12 subcarriers in the frequency domain. On the time axis, the antenna ports port7, port8, port11 and port13 share 4 REs, and the antenna ports port9, port10, port12 and port14 share the other 4 REs. As can be seen from Figure 3, the antenna ports port7, port8, port11 and port13 occupy The REs occupied by the antenna ports port9, port10, port12, and port14 are different from the REs occupied by the antenna ports port9, port10, port12, and port14, and are orthogonal to each other in the frequency domain.

Table 1 shows the information used in LTE Rel-10 to indicate the number of codewords, number of layers (ie layer), antenna port number and scrambling code identifier (ie n _SCID ) specifically used by each UE. Through Table 1, it can be clarified that for each downlink port, how to use the 2 ^N values of the scrambling code identifier to distinguish the 2 ^N values of the DM-RS scrambling code sequence on the downlink antenna port.

Table 1

As can be seen from the above table, in LTE Rel-10, when using single codeword transmission, there are 4 configurations for a single layer, which can support 4 UEs for MU-MIMO, and there is 1 configuration for each of the 2-4 layers. Can support single-user MIMO (SU-MIMO); when using dual codeword transmission, there are two configurations on layer 2, which can support 2 UEs for MU-MIMO, and there is one configuration on layers 3-8, which can only support SU-MIMO.

Two scenarios where N is equal to 1 and N is equal to 2 are taken as examples for illustration below.

If N=1:

In one implementation, for a total of 8 downlink antenna ports from port 7 to port 14, n _SCIDs with a size of N bits are used to distinguish 2 ^N kinds of DM-RS scrambling code sequences on the same downlink antenna port, then single codeword transmission and The port mapping method during dual codeword transmission can be shown in the indication table of Table 2

Table 2

Among them, the instruction table includes: a single code word instruction table (as shown in the "single code word transmission" column on the left in Table 2) and a double code word instruction table (as shown in the "double code word transmission" column on the right in Table 2) ), in the single code word indication table, the "information" column is the 16 possible _antenna port numbers, layer numbers and n Combinations of _SCIDs , the column of Value (that is, the demodulation indicator value) corresponds to the 16 combinations in the column of "Information" respectively. Similarly, in the dual code word indication table, the column of "Information" is the above-mentioned 1-bit n _SCID 16 possible combinations of antenna port number, layer number and n _SCID obtained by distinguishing the DM-RS scrambling code sequence of each antenna port, the column of Value (that is, the demodulation indicator value) and the column of "Information" respectively The 16 combinations in the corresponding one-to-one.

In the embodiment of the present invention, Table 2 may be pre-stored in the transmitting node and the UE.

The following is an example of a transmitting node using a single codeword transmission for a certain UE (hereinafter referred to as UE1): After the transmitting node obtains the demodulation information of UE1 including the antenna port number, n _SCID and layer number, it transmits The node obtains the demodulation indication value corresponding to the combination of UE1's antenna port number, n _SCID and layer number from the single code word indication table in Table 2, and sends the demodulation indication value to the UE1, after receiving the demodulation indication value from the transmitting node, UE1 acquires corresponding information from the single codeword indication table in Table 2. For example, assuming that the demodulation indication value received by UE1 is 0, it means that the current layer number of UE1 is 1 layer, the antenna port port7 is used, and n _SCID is equal to 0. If there is still UE2, and the demodulation indication value received by UE2 If it is 1, it indicates that the current layer number of UE2 is 1 layer, the antenna port port7 is used, and n _SCID is equal to 1. At this time, UE1 and UE2 use the same downlink antenna port, but use different DM-RS scrambling code sequences. Further, If UE3 still exists, and the demodulation indication value received by UE3 is 4, it indicates that the current layer number of UE3 is 1 layer, the antenna port port9 is used, and n _SCID is equal to 0. The MIMO mode of UE1, UE2 and UE3 in the above example SU-MIMO can be used, that is, the time-frequency resources allocated to UE1, UE2, and UE3 are different. Of course, any two or all of UE1, UE2, and UE3 can also use MU-MIMO for communication. UE1, UE2, and Any two or all three of UE3 may use the same time-frequency resource.

It can be seen from Table 2 that when a single codeword is used for transmission, there are 8 configurations in a single layer, which can support 8 UEs for MU-MIMO; there are 4 configurations in the 2nd layer, which can support 4 UEs for MU-MIMO; There are 2 configurations for each of the 4 layers, which can support 2 UEs for MU-MIMO; when using dual codeword transmission, there are 4 configurations for the 2nd layer, which can support 4 UEs for MU-MIMO, and each of the 3-8 layers has 2 configurations. This configuration can support 2 UEs to perform MU-MIMO. In the embodiment of the present invention, the number of users supported by MU-MIMO is doubled without increasing signaling.

Furthermore, in the embodiment of the present invention, it can be known from the above that the REs occupied by the antenna ports port7, port8, port11, and port13 are different from the REs occupied by the antenna ports port9, port10, port12, and port14, and are orthogonal to each other in the frequency domain, so , assuming that the transmitting node only allocates the antenna ports port7 and port8 to UE1, but does not allocate the antenna ports port9 and port10 to other UEs, the transmitting node can use the REs on the antenna ports port9 and port10 to transmit the downlink data of UE1, that is It is not necessary to reserve the REs on the antenna ports port9 and port10 for other UEs. Similarly, if the transmitting node only allocates the antenna ports port9 and port10 to UE1, but does not allocate the antenna ports port7 and port8 to other UEs, Then the transmitting node can use the REs on the antenna ports port7 and port8 to transmit the downlink data of UE1, that is, there is no need to reserve the REs on the antenna ports port7 and port8 for use by other UEs. It is also assumed that if the transmitting node allocates antenna ports port7 and port8 to UE1, and allocates antenna ports port9 and port10 to UE2, then when the transmitting node uses antenna ports port7 and port8, the REs on antenna ports port9 and port10 need Reserved for use by UE2, which means that the transmitting node performs rate matching on the downlink data channel of UE1 at the RE position where the upper antenna port port9 and port10 are located, that is, not at the RE position where the antenna port port9 and port10 are located Similarly, when the transmitting node uses antenna ports port9 and port10, REs on antenna ports port7 and port8 need to be reserved for UE1 to use. The transmitting node can further indicate to the UE whether to perform rate matching on other downlink antenna ports through corresponding signaling (such as DCI or RRC messages), so that when the UE knows that rate matching needs to be performed on other downlink antenna ports, the downlink data of the UE The channel performs rate matching on the time-frequency resources occupied by other downlink antenna ports. Of course, the UE can also determine whether to perform rate matching on other downlink antenna ports according to the obtained demodulation information according to the agreement. Antenna ports are rate matched.

In another implementation, when the number of layers is 1 and 2, for a total of 4 downlink antenna ports from port 7 to port 10, use N-bit n _SCIDs to distinguish 2 ^N types of DM-RS on the same downlink antenna port scrambling code sequence, the port mapping mode during single-codeword transmission and double-codeword transmission can be as shown in the indication table in Table 3.

table 3

Alternatively, in the embodiment of the present invention, in layers 1 to 4, for a total of 4 downlink antenna ports from port 7 to port 10, use N-bit n _SCIDs to distinguish 2 ^N types of DM-RS on the same downlink antenna port. scrambling code sequence, the port mapping mode during single-codeword transmission and double-codeword transmission can be as shown in the indication table in Table 4.

Table 4

Of course, in this embodiment of the present invention, n _SCIDs with a size of N bits can also be used to distinguish DM-RS scrambling code sequences for other downlink antenna ports, which is not limited here.

If N=2:

In one implementation, for a total of 8 downlink antenna ports from port 7 to port 14, n _SCIDs with a size of N bits are used to distinguish 2 ^N kinds of DM-RS scrambling code sequences on the same downlink antenna port, then single codeword transmission and The port mapping manner during dual codeword transmission may be as shown in the indication table in Table 5.

table 5

Among them, the instruction table includes: a single code word instruction table (as shown in the "single code word transmission" column on the left in Table 3) and a double code word instruction table (as shown in the "dual code word transmission" column on the right in Table 2) ), in the single code word indication table, the "information" column is the 32 possible _antenna port numbers, layer numbers and n Combinations of _SCIDs , the column of Value (that is, the demodulation indicator value) corresponds to the 32 combinations in the column of "Information" respectively. Similarly, in the double code word indication table, the column of "Information" is the above-mentioned 2-bit n _SCID 32 possible combinations of antenna port number, layer number and n _SCID obtained by distinguishing the DM-RS scrambling code sequence of each antenna port, the column of Value (that is, the demodulation indicator value) and the column of "Information" respectively There are 32 combinations in one-to-one correspondence.

In the embodiment of the present invention, Table 3 can be pre-stored in the transmitting node and the UE. When the transmitting node indicates the demodulation indication value to the UE using a DCI or RRC message, it needs to use a 5-bit DCI or RRC message to lower the demodulation indication value. For the rest of the steps in the implementation of the present invention, you can refer to the description in the embodiment where N=1, and details will not be repeated here.

In another implementation, when the number of layers is 1 and 2, for a total of 4 downlink antenna ports from port 7 to port 10, use N-bit n _SCIDs to distinguish 2 ^N types of DM-RS on the same downlink antenna port scrambling code sequence, the port mapping mode during single-codeword transmission and double-codeword transmission can be as shown in the indication table in Table 6.

Table 6

Alternatively, in the embodiment of the present invention, in layers 1 to 4, for a total of 4 downlink antenna ports from port 7 to port 10, use N-bit n _SCIDs to distinguish 2 ^N types of DM-RS on the same downlink antenna port. scrambling code sequence, then the port mapping mode during single-codeword transmission and double-codeword transmission can be as shown in the indication table in Table 7.

Table 7

Of course, in this embodiment of the present invention, n _SCIDs with a size of N bits can also be used to distinguish DM-RS scrambling code sequences for other downlink antenna ports, which is not limited here.

It should be noted that the antenna port numbers port7 to port14 in the implementation of the above invention are only the names defined in LTErel-10. In other versions of the protocol, the tags of these antenna port names can be changed, such as m07-m14, where m is a non-negative integer, or named as 207-214, 307-314 or 407-414, etc., and the value 0-15 as the demodulation indicator value in the embodiment of the present invention can also be replaced by other values or identifiers .

The transmitting node in the embodiment of the present invention is described below, please refer to FIG. 4, the transmitting node 400 in the embodiment of the present invention includes:

The first obtaining unit 401 is configured to obtain demodulation information of the UE, wherein the above demodulation information includes: a port identifier used to indicate the downlink antenna port allocated by the transmitting node 400 to the above UE, and used to determine the downlink antenna The scrambling code identification of the DM-RS scrambling code sequence on the port, and the number of layers, wherein, for at least four downlink antenna ports, the transmitting node 400 uses the 2 ^N values of the above scrambling code identification to distinguish each downlink antenna port 2 ^N kinds of values of the above-mentioned DM-RS scrambling code sequence, wherein the above-mentioned N is a natural number.

The second obtaining unit 402 is configured to obtain a demodulation indication value indicating the demodulation information obtained by the first obtaining unit 401 .

The sending unit 403 is configured to send the demodulation indication value obtained by the second obtaining unit 402 to the above-mentioned UE, so that the above-mentioned UE obtains demodulation information according to the above-mentioned demodulation indication value, and identifies the corresponding The received data is demodulated on the downlink antenna port.

In the embodiment of the present invention, the sending unit 403 can use a DCI or RRC message with a size of not less than 4 bits to send the obtained demodulation indication value to the above-mentioned UE. Of course, the sending unit 403 can also extend other existing signaling or new Signaling is added to send the acquired demodulation indication value to the UE, which is not limited here.

In one embodiment, each combination of the values of the port identifier, the scrambling code identifier, and the number of layers corresponds to a different demodulation indication value, and the second acquisition unit 402 is specifically configured to: in the first acquisition unit 401 After obtaining the demodulation information, obtain a corresponding demodulation indication value according to the port identification, scrambling code identification and layer number in the demodulation information. In practical applications, the indication table can be stored in the transmitting node 400 in advance. The indication table contains: the combination of the port identifier, the scrambling code identifier and the number of layers, and the correspondence relationship information with the demodulation indication value. The second acquiring unit 402 acquires a corresponding demodulation indication value from the pre-stored indication table according to the port identifier, the scrambling code identifier and the number of layers in the demodulation information.

Since the combination of the port identifier, the scrambling code identifier, and the number of layers may be the same in the single-codeword transmission mode and the double-codeword transmission mode, the present invention can also divide the indication table into: single codeword indication table and double code word indication table, and in the single code word indication table and double code word indication table respectively, a combination of the values of the port identification, the scrambling code identification and the number of layers corresponds to a demodulation indication value, that is, the combination of the port identifier, the scrambling code identifier, and the number of layers is in one-to-one correspondence with the demodulation indication value. In this scenario, the single-codeword indication table and the double-codeword indication table may contain the same demodulation indication value. On the basis of the embodiment shown in FIG. 4 , the transmitting node 400 in the embodiment of the present invention further includes: a first judging unit, configured to judge Whether the transmitting node uses single-codeword transmission or double-codeword transmission for the UE, the second acquiring unit 402 is specifically configured to: when the first judging unit determines that the transmitting node 400 uses single-codeword transmission for the UE, according to Obtain a corresponding demodulation indication value from the single codeword indication table for the port identification, scrambling code identification and layer number in the demodulation information; when the first judging unit determines that the transmitting node 400 uses a double codeword During transmission, according to the port identifier, scrambling code identifier and layer number in the above-mentioned demodulation information, a corresponding demodulation instruction value is obtained from the dual codeword instruction table.

Of course, the second obtaining unit 402 in the embodiment of the present invention can also obtain the demodulation indication value indicating the demodulation information in other ways, for example, the second obtaining unit 402 can obtain the indication from the cloud platform by communicating with the cloud platform The demodulation indicator value of the demodulation information is not limited here.

Further, in an implementation manner, the transmitting node 400 further includes: a second judging unit and a rate matching unit, the second judging unit is configured to: when the number of downlink antenna ports allocated by the transmitting node 400 to the UE is 1, Or, when the number of downlink antenna ports allocated by the transmitting node 400 to the above-mentioned UE is greater than 1, and all the downlink antenna ports used by the transmitting node 400 allocated to the above-mentioned UE1 occupy the same time-frequency resources, it is judged whether the downlink antenna ports of the above-mentioned UE need to be The data channel (such as PDSCH) is rate-matched (that is, punctured) on the time-frequency resources occupied by other downlink antenna ports. The time-frequency resources occupied by the ports have different REs in the frequency domain; the above-mentioned rate matching unit is used for: when the above-mentioned second judging unit judges that the downlink data channel of the above-mentioned UE needs to be used on the time-frequency resources occupied by other downlink antenna ports When performing rate matching, rate matching is performed on the downlink data channel of the aforementioned UE on the time-frequency resources occupied by the aforementioned other downlink antenna ports; further, the sending unit 403 is also configured to send the first reservation indication information to the aforementioned UE, wherein the aforementioned The first reservation indication information is used to indicate to the above-mentioned UE that the transmitting node 400 has performed rate matching on the time-frequency resources occupied by the above-mentioned other downlink antenna ports for the downlink data channel of the above-mentioned UE, and the sending unit 403 is also used for when the above-mentioned second judgment When the unit determines that it is not necessary to perform rate matching on the downlink data channel of the UE on the time-frequency resources occupied by other downlink antenna ports, it sends the second reservation indication information to the UE, wherein the second reservation indication information is used for Indicating to the above-mentioned UE that the transmitting node 400 does not perform rate matching on the time-frequency resources occupied by the above-mentioned other downlink antenna ports for the downlink data channel of the above-mentioned UE. Specifically, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information may be DCI or RRC messages, for example, new DCI or RRC signaling may be used to indicate, or existing signaling may be used to make Piggybacking, such as using the NDI parameter in the DCI signaling to piggyback the first reservation indication information or the second reservation indication information, the length of NDI is 1 bit, under normal circumstances, NDI is used to indicate that in the downlink transmission Among them, whether the data transmitted by each code block is newly transmitted data or old transmitted data, the embodiment of the present invention uses this 1 bit to further indicate the reservation to UE1, for example, when it is necessary to send the above-mentioned first reservation indication information to UE1, The value of NDI is set to 1, and the value of NDI is set to 0 when the above-mentioned second reservation indication information needs to be sent to UE1. Of course, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information in this embodiment of the present invention may also be other extended signaling or newly added signaling, which is not limited here.

In another implementation, the transmitting node 400 may only include a rate matching unit, and the rate matching unit is used when the number of downlink antenna ports allocated by the transmitting node 400 to the UE is 1, or the transmitting node 400 allocates to the above-mentioned When the number of downlink antenna ports used by the UE is greater than 1, and the time-frequency resources occupied by all the downlink antenna ports allocated by the transmitting node 400 to the above-mentioned UE are the same, when the downlink data channel of the above-mentioned UE is occupied by the above-mentioned other downlink antenna ports Rate matching is performed on frequency resources, wherein the time-frequency resources occupied by the other downlink antenna ports and the time-frequency resources occupied by the downlink antenna ports allocated by the transmitting node 400 to the UE occupy different REs in the frequency domain.

It should be noted that the transmitting node 400 in the embodiment of the present invention may be an eNB, a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems.

It should be noted that the transmitting node 400 in the embodiment of the present invention can be like the transmitting node in the above-mentioned method embodiment, and can be used to realize all the technical solutions in the above-mentioned method embodiment, and the functions of each functional module can be implemented according to the above-mentioned method The method in the example is specifically implemented, and the specific implementation process may refer to the relevant description in the above-mentioned embodiments, and details are not repeated here.

It can be seen from the above that in the technical solution provided by the embodiment of the present invention, for at least four downlink antenna ports, the 2 ^N values of the above-mentioned scrambling code identifiers are used to respectively distinguish the 2 values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port. There are different values of ^N , thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

A user equipment provided by an embodiment of the present invention is described below. Please refer to FIG. 5 . The user equipment 500 in this embodiment of the present invention includes:

The receiving unit 501 is configured to receive a demodulation indication value from a transmitting node.

The acquiring unit 502 is configured to acquire demodulation information corresponding to the demodulation indication value according to the demodulation indication value received by the receiving unit 501, wherein the demodulation information includes: used to instruct the transmitting node to allocate to the user equipment The port identifier corresponding to the downlink antenna port used is used to determine the scrambling code identifier and the number of layers of the DM-RS scrambling code sequence on the downlink antenna port, wherein the above-mentioned transmitting node uses the above-mentioned scrambling code for at least four downlink antenna ports The 2 ^N types of values identified respectively distinguish the 2 ^N types of values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port, wherein the above-mentioned N is a natural number.

The demodulation processing unit 503 is configured to perform demodulation processing on the received data on the downlink antenna port corresponding to the port identifier according to the demodulation information obtained by the obtaining unit 502 .

In one embodiment, each combination of the values of the port identifier, the scrambling code identifier, and the number of layers corresponds to a different demodulation indication value. In practical applications, the indication table can be stored in advance in the transmitting node Locally, the indication table includes: the combination of the port identifier, the scrambling code identifier, and the number of layers, and the correspondence relationship information with the demodulation indication value. The obtaining unit 502 is specifically configured to: after the receiving unit 501 receives the demodulation indication value, according to the demodulation indication value received by the receiving unit 501, obtain the corresponding port identification, scrambling code identification and layer number from the pre-stored indication table, to obtain the corresponding demodulation information.

Since the combination of the port identifier, the scrambling code identifier, and the number of layers may be the same in the single-codeword transmission mode and the double-codeword transmission mode, the present invention can also divide the indication table into: single codeword indication table and double code word indication table, and in the single code word indication table and double code word indication table respectively, a combination of the values of the port identification, the scrambling code identification and the number of layers corresponds to a demodulation indication value, that is, the combination of the port identifier, the scrambling code identifier, and the number of layers is in one-to-one correspondence with the demodulation indication value. In this scenario, the single-codeword indication table and the double-codeword indication table may contain the same demodulation indication value. On the basis of the embodiment shown in FIG. 5 , the user equipment 500 in the embodiment of the present invention further includes: a judging unit, configured to judge whether the above-mentioned transmitting node uses single-codeword transmission or double-codeword transmission for the user equipment 500; an acquisition unit 502, specifically: when the judging unit judges that the transmitting node uses a single codeword for transmission to the user equipment 500, according to the demodulation indication value, obtain the corresponding port identifier and scrambling code identifier from the single codeword indication table and the number of layers; when the judging unit judges that the transmitting node uses dual-codeword transmission for the user equipment 500, according to the demodulation indication value, obtain the corresponding port identifier, scrambling code identifier, and layer from the dual-codeword indication table number. Of course, the user equipment 500 can also obtain the port identifier, scrambling code identifier and layer number corresponding to the demodulation indicator value in other ways. For example, the user equipment 500 can obtain the port ID corresponding to the demodulation indicator value through other network devices connected to it. The identification, scrambling code identification and layer number, or communicate with the cloud platform to obtain the port identification, scrambling code identification and layer number corresponding to the demodulation indication value from the cloud platform, which is not limited here.

Further, when the number of downlink antenna ports allocated by the transmitting node to the user equipment 500 is 1, or the number of downlink antenna ports allocated by the transmitting node to the user equipment 500 is greater than 1, and all the antenna ports allocated by the transmitting node to the user equipment 500 are When the time-frequency resources occupied by the downlink antenna ports are the same, the transmitting node judges whether it is necessary to perform rate matching (that is, punching) on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel (such as PDSCH) of the user equipment 500. If necessary, perform rate matching on the downlink data channel of the user equipment 500 on time-frequency resources occupied by other downlink antenna ports, and send first reservation indication information to the user equipment 500, wherein the first reservation indication information uses In order to indicate to the user equipment 500 that the transmitting node has performed rate matching on the time-frequency resources occupied by the other downlink antenna ports of the user equipment 500's downlink data channel, if not needed, send the second reservation indication information to the user equipment 500 , wherein the second reservation indication information is used to indicate to the user equipment 500 that the transmitting node does not perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the user equipment 500. Therefore, the embodiment of the present invention The receiving unit 501 is further configured to receive the above-mentioned first reservation indication information from the above-mentioned transmitting node, and further, the user equipment 500 further includes: a rate matching unit, configured to receive the above-mentioned first reservation indication at the receiving unit 501 information, rate matching is performed on the time-frequency resources occupied by the above-mentioned other downlink antenna ports for the downlink data channel of the user equipment 500. Further, the above-mentioned first reservation indication information and the above-mentioned second reservation indication information may be DCI or RRC messages, for example, new DCI or RRC signaling may be used for indication, or existing signaling may be used for piggybacking For example, the parameter NDI in the DCI signaling is used to piggyback the first reservation indication information or the second reservation indication information. Of course, the first reservation indication information and the second reservation indication information may also be Other extended signaling or newly added signaling is not limited here.

It should be noted that, the transmitting node in the embodiment of the present invention may be an eNB, a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems.

It should be noted that the user equipment 500 in the embodiment of the present invention can be like the UE in the above method embodiment, and can be used to implement all the technical solutions in the above method embodiment, and the functions of each functional module can be according to the above method embodiment The method in is specifically implemented, and the specific implementation process can refer to the relevant description in the above-mentioned embodiments, and details are not repeated here.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifiers are used to distinguish the above-mentioned 2 ^N types of DM-RS scrambling code sequences on each downlink antenna port. value, thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

An embodiment of the present invention also provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes part or all of the arrangements described in the above method embodiments.

Another transmitting node in the implementation of the present invention is described below, please refer to FIG. 6. The transmitting node 600 in the embodiment of the present invention includes:

The processor 601 is configured to acquire demodulation information of the UE and acquire a demodulation indication value indicating the above-mentioned demodulation information, wherein the above-mentioned demodulation information includes: used to indicate that the transmitting node 600 corresponds to the downlink antenna port allocated to the above-mentioned UE. The port identifier, and the scrambling code identifier used to determine the DM-RS scrambling code sequence on the downlink antenna port, and the number of layers, wherein the transmitting node 400 uses 2 ^N types of the above scrambling code identifiers for at least four downlink antenna ports The values are respectively distinguished from 2 ^N values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port, wherein the above-mentioned N is a natural number;

The radio frequency device 602 is configured to send the above-mentioned demodulation indication value to the above-mentioned UE, so that the above-mentioned UE obtains demodulation information according to the above-mentioned demodulation indication value, and receives the The data is demodulated.

In the embodiment of the present invention, the radio frequency device 602 can use a DCI or RRC message with a size of no less than 4 bits to send the obtained demodulation indication value to the above-mentioned UE. Of course, the radio frequency device 602 can also extend other existing signaling or new Signaling is added to send the acquired demodulation indication value to the UE, which is not limited herein.

In one embodiment, each combination of the port identifier, the scrambling code identifier, and the number of layers corresponds to a different demodulation indicator value, and the processor 601 is specifically configured to: after obtaining the demodulation information, according to Demodulate the port identifier, scrambling code identifier and layer number in the information to obtain a corresponding demodulation indicator value. In practical applications, the indicator table can be stored in the transmitting node 600 in advance. The indicator table includes: port identifier, scrambling code The combination of the values of the code identifier and the number of layers, and the correspondence relation information of the demodulation indication value. The processor 601 obtains a corresponding demodulation indication value from the pre-stored indication table according to the port identifier, the scrambling code identifier and the number of layers in the demodulation information.

Since the combination of the port identifier, the scrambling code identifier, and the number of layers may be the same in the single-codeword transmission mode and the double-codeword transmission mode, the present invention can also divide the indication table into: single codeword indication table and double code word indication table, and in the single code word indication table and double code word indication table respectively, a combination of the values of the port identification, the scrambling code identification and the number of layers corresponds to a demodulation indication value, that is, the combination of the port identifier, the scrambling code identifier, and the number of layers is in one-to-one correspondence with the demodulation indication value. In this scenario, the single-codeword indication table and the double-codeword indication table may contain the same tone indication value. Therefore, the processor 601 is further configured to judge whether the transmitting node 600 uses single-codeword transmission or dual-codeword transmission for the above-mentioned UE before acquiring the demodulation indication value indicating the above-mentioned demodulation information. When the UE uses a single codeword for transmission, according to the port identifier, scrambling code identifier and layer number in the above demodulation information, obtain a corresponding demodulation indication value from the single codeword indication table; When dual codeword transmission is used, a corresponding demodulation indication value is obtained from the dual codeword indication table according to the port identifier, scrambling code identifier and layer number in the demodulation information.

Further, the processor 601 is further configured to: the number of downlink antenna ports allocated to the UE by the transmitting node 600 is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node 600 is greater than 1, and the transmitting node 600 When the time-frequency resources occupied by all the downlink antenna ports allocated to the aforementioned UE are the same, perform rate matching on the time-frequency resources occupied by the aforementioned other downlink antenna ports for the downlink data channel of the aforementioned UE, wherein the aforementioned other downlink antenna ports The occupied time-frequency resources are different from REs occupied in the frequency domain by the time-frequency resources occupied by the downlink antenna ports allocated by the transmitting node 600 to the UE.

Specifically, the processor 601 and the radio frequency device 602 may be implemented by using an integrated circuit. It should be noted that the transmitting node 600 in the embodiment of the present invention may be an eNB, a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems. The transmitting node 600 in the embodiment of the present invention can be like the transmitting node in the above method embodiment, and can be used to realize all the technical solutions in the above method embodiment, and the functions of each functional module can be specified according to the method in the above method embodiment For the specific implementation process, reference may be made to relevant descriptions in the foregoing embodiments, and details are not repeated here.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifiers are used to distinguish the above-mentioned 2 ^N types of DM-RS scrambling code sequences on each downlink antenna port. value, thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

Another user equipment in the implementation of the present invention is described below. Please refer to FIG. 7. The user equipment 700 in the embodiment of the present invention includes: including:

a processor 701 and a radio frequency device 702;

Wherein, the radio frequency device 702 is used to receive the demodulation indication value from the transmitting node;

The processor 701 is configured to: acquire demodulation information corresponding to the demodulation indication value according to the demodulation indication value in the downlink control information received by the radio frequency device 702, wherein the demodulation information includes: a The port identifier corresponding to the downlink antenna port used by the user equipment, and the scrambling code identifier used to determine the DM-RS scrambling code sequence on the downlink antenna port, and the number of layers, wherein the above-mentioned transmitting node has at least four downlink antennas port, using the 2 ^N values of the scrambling code identifier to distinguish the 2 ^N values of the above-mentioned DM-RS scrambling code sequence on each downlink antenna port, wherein the above-mentioned N is a natural number; according to the obtained demodulation information in The received data is demodulated on the corresponding downlink antenna port.

Specifically, the processor 701 and the radio frequency device 702 may be implemented by using an integrated circuit.

It should be noted that, the transmitting node in the embodiment of the present invention may be an eNB, a relay node, an extended transmitting unit after using optical fibers or other wireless transmitting devices, which is not limited here. The embodiments of the present invention can be applied to an existing version of an LTE system or a later version of an LTE system or other multi-antenna systems.

It should be noted that the user equipment in the embodiment of the present invention can be like the UE in the above method embodiment, and can be used to implement all the technical solutions in the above method embodiment, and the functions of each functional module can be based on the above method embodiment The specific implementation of the method, the specific implementation process can refer to the relevant description in the above embodiment, and will not be repeated here.

It can be seen from the above that in the technical solution provided by the present invention, for at least four downlink antenna ports, 2 ^N values of the above-mentioned scrambling code identifiers are used to distinguish the above-mentioned 2 ^N types of DM-RS scrambling code sequences on each downlink antenna port. value, thereby expanding the number of users supported by the MIMO system, and fully utilizing the performance advantages of a multi-antenna system with more antennas.

It should be noted that, for the sake of simplicity of description, the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments. For example, for the functions performed by any unit or module in the device embodiments, please refer to the introduction of the method embodiments.

Those skilled in the art can understand that all or part of the steps in the various methods in the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium can be, for example, Including: read-only memory, random access memory, magnetic disk or optical disk, etc.

The method for sending and receiving demodulation information and related devices in a MIMO system provided by the present invention have been introduced in detail above. For those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in the specific implementation and application There will be changes in the scope. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (22)

1. A method for sending demodulated information in a MIMO system, characterized in that, comprising: The transmitting node obtains the demodulation information of the user equipment UE, where the demodulation information includes: a port identifier used to indicate the downlink antenna port allocated by the transmitting node to the UE, and used to determine the downlink antenna port The scrambling code identification of the demodulation reference signal DM-RS scrambling code sequence and the number of layers, wherein, for at least four downlink antenna ports, the transmitting node uses 2 ^N values of the scrambling code identification to distinguish each 2 ^N values of the DM-RS scrambling code sequence on the downlink antenna ports, wherein the N is a natural number; acquiring a demodulation indication value indicating the demodulation information; Sending the demodulation indication value to the UE, so that the UE acquires demodulation information according to the demodulation indication value, and allocates the demodulation information to the transmitting node corresponding to the port identifier according to the acquired demodulation information Demodulate the received data on the downlink antenna port used by the UE; Wherein, after said acquiring the demodulation information of the user equipment UE, If the number of downlink antenna ports allocated to the UE by the transmitting node is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, and the number of downlink antennas is greater than 1 The time-frequency resources occupied by the ports are all the same, then the method further includes: Judging whether it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the UE, where the time-frequency resources occupied by the other downlink antenna ports are the same as the time-frequency resources occupied by the downlink antenna ports The resource element RE occupied by the resource in the frequency domain is different; If it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel of the UE, then: performing rate matching on the time-frequency resources occupied by the other downlink antenna ports for the downlink data channel of the UE; Sending first reservation indication information to the UE, where the first reservation indication information is used to indicate to the UE the number of times the transmitting node occupies the UE's downlink data channel on the other downlink antenna port Rate matching is performed on time-frequency resources; Or, after acquiring the demodulation information of the user equipment UE, If the number of downlink antenna ports allocated to the UE by the transmitting node is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, and the number of downlink antennas is greater than 1 The time-frequency resources occupied by the ports are all the same, then the method further includes: performing rate matching on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel of the UE, where the time-frequency resources occupied by the other downlink antenna ports are different from the time-frequency resources occupied by the downlink antenna ports The resource elements occupied by domains are different. 2. The method according to claim 1, wherein said acquiring a demodulation indication value indicating said demodulation information comprises: The demodulation indication value is acquired from a pre-stored indication table according to the demodulation information. 3. The method of claim 2, wherein, The pre-stored instruction table includes: a single codeword instruction table and a double codeword instruction table; Before acquiring the demodulation indication value from the pre-stored indication table according to the demodulation information, it includes: judging whether the transmitting node uses single-codeword transmission or dual-codeword transmission for the UE; The obtaining the demodulation indication value from a pre-stored indication table according to the demodulation information includes: If the transmitting node uses single codeword transmission for the UE, then: Acquiring the demodulation indication value from the single codeword indication table according to the demodulation information; If the transmitting node uses dual codeword transmission for the UE, then: Acquire the demodulation indication value from the dual codeword indication table according to the demodulation information. 4. The method according to claim 3, wherein said N is equal to 1; The demodulation indication value contained in the single code word indication table is 16 numerical values, and the 16 numerical values in the single code word indication table are in one-to-one correspondence with the following 16 kinds of information: The number of layers is 1, the port ID is port7, and the scrambling code ID is 0; The number of layers is 1, the port ID is port7, and the scrambling code ID is 1; The number of layers is 1, the port ID is por8, and the scrambling code ID is 0; The number of layers is 1, the port ID is port8, and the scrambling code ID is 1; The number of layers is 1, the port ID is port9, and the scrambling code ID is 0; The number of layers is 1, the port ID is port9, and the scrambling code ID is 1; The number of layers is 1, the port ID is port10, and the scrambling code ID is 0; The number of layers is 1, the port ID is port10, and the scrambling code ID is 1; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 0; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1. 5. The method according to claim 3 or 4, wherein said N is equal to 1; The demodulation indication value contained in the double code word indication table is 16 numerical values, and the 16 numerical values in the double code word indication table correspond to the following 16 kinds of information one by one: The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1; The number of layers is 2, the port ID is por9-10, and the scrambling code ID is 0; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1; The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 0; The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 1; The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 0; The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 1; The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 0; The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 1; The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 0; The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 1. 6. The method according to claim 1, further comprising: If it is not necessary to perform rate matching on the downlink data channel of the UE on time-frequency resources occupied by other downlink antenna ports, then send second reservation indication information to the UE, wherein the second reservation indication information uses In order to indicate to the UE that the transmitting node does not perform rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the UE. 7. The method according to claim 1 or 6, characterized in that, The sending the first reservation indication information to the UE includes: Sending the first reservation indication information to the UE through downlink control information DCI or a radio resource control RRC message. 8. according to the method described in any one of claim 1 to 4,6, it is characterized in that, The sending the demodulation indication value to the UE includes: Send the obtained demodulation indication value to the UE by using a DCI or RRC message with a size not smaller than 4 bits. 9. A method for receiving demodulated information in a MIMO system, characterized in that it comprises: The user equipment UE receives the demodulation indication value from the transmitting node; Obtain demodulation information corresponding to the demodulation indication value according to the demodulation indication value, where the demodulation information includes: a port corresponding to a downlink antenna port allocated by the transmitting node to the UE An identifier, and a scrambling code identifier for determining a demodulation reference signal DM-RS scrambling code sequence on a downlink antenna port, and the number of layers, wherein the transmitting node uses the scrambling code for at least four downlink antenna ports The 2 ^N kinds of values of the identification respectively distinguish the 2 ^N kinds of values of the DM-RS scrambling code sequence on each downlink antenna port, wherein the N is a natural number; performing demodulation processing on the received data on the downlink antenna port allocated to the UE by the transmitting node corresponding to the port identifier according to the acquired demodulation information; Wherein, after obtaining the demodulation information corresponding to the demodulation indication value according to the demodulation indication value, The method also includes: When receiving the first reservation indication information from the transmitting node, perform rate matching on the time-frequency resources occupied by other downlink antenna ports on the downlink data channel of the UE, wherein the first reservation indication information It is used to indicate to the UE that the transmitting node performs rate matching on the time-frequency resources occupied by the other downlink antenna ports for the downlink data channel of the UE, and the time-frequency resources occupied by the other downlink antenna ports are the same as the time-frequency resources occupied by the other downlink antenna ports. The resource elements RE occupied by the time-frequency resources occupied by the downlink antenna ports in the frequency domain are different; Or, after obtaining the demodulation information corresponding to the demodulation indication value according to the demodulation indication value, the method further includes: receiving second reservation indication information from the transmitting node, wherein the second reservation indication information is used to indicate to the UE that the transmitting node does not use the other downlink data channel for the UE Rate matching is performed on the time-frequency resources occupied by the antenna ports. 10. The method of claim 9, wherein, The acquiring demodulation information corresponding to the demodulation indication value according to the demodulation indication value includes: According to the demodulation indication value, demodulation information corresponding to the demodulation indication value is acquired from a prestored indication table. 11. The method of claim 10, wherein, The pre-stored instruction table includes: a single codeword instruction table and a double codeword instruction table; According to the demodulation indication value, before obtaining the demodulation information corresponding to the demodulation indication value from the pre-stored indication table, it includes: judging whether the transmitting node currently uses single-codeword transmission or dual-codeword transmission for the UE; The obtaining demodulation information corresponding to the demodulation indication value from a pre-stored indication table according to the demodulation indication value includes: If the transmitting node uses single codeword transmission for the UE, then: Acquiring demodulation information corresponding to the demodulation indication value from the single codeword indication table according to the demodulation indication value; If the transmitting node uses dual codeword transmission for the UE, then: Obtain demodulation information corresponding to the demodulation indication value from the dual codeword indication table according to the demodulation indication value. 12. The method according to claim 11, wherein said N is equal to 1; The demodulation indication value contained in the single code word indication table is 16 numerical values, and the 16 numerical values in the single code word indication table are in one-to-one correspondence with the following 16 kinds of information: The number of layers is 1, the port ID is port7, and the scrambling code ID is 0; The number of layers is 1, the port ID is port7, and the scrambling code ID is 1; The number of layers is 1, the port ID is por8, and the scrambling code ID is 0; The number of layers is 1, the port ID is port8, and the scrambling code ID is 1; The number of layers is 1, the port ID is port9, and the scrambling code ID is 0; The number of layers is 1, the port ID is port9, and the scrambling code ID is 1; The number of layers is 1, the port ID is port10, and the scrambling code ID is 0; The number of layers is 1, the port ID is port10, and the scrambling code ID is 1; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 0; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1. 13. The method according to claim 11 or 12, wherein said N is equal to 1; The demodulation indication value contained in the double code word indication table is 16 numerical values, and the 16 numerical values in the double code word indication table correspond to the following 16 kinds of information one by one: The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 0; The number of layers is 2, the port ID is port7-8, and the scrambling code ID is 1; The number of layers is 2, the port ID is por9-10, and the scrambling code ID is 0; The number of layers is 2, the port ID is port9-10, and the scrambling code ID is 1; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 0; The number of layers is 3, the port ID is port7-9, and the scrambling code ID is 1; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 0; The number of layers is 4, the port ID is port7-10, and the scrambling code ID is 1; The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 0; The number of layers is 5, the port ID is port7-11, and the scrambling code ID is 1; The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 0; The number of layers is 6, the port ID is port7-12, and the scrambling code ID is 1; The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 0; The number of layers is 7, the port ID is port7-13, and the scrambling code ID is 1; The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 0; The number of layers is 8, the port ID is port7-14, and the scrambling code ID is 1. 14. A transmitting node, characterized in that, comprising: The first obtaining unit is configured to obtain demodulation information of the user equipment UE, where the demodulation information includes: a port identifier used to indicate that the transmitting node corresponds to a downlink antenna port allocated to the UE, and is used To determine the scrambling code identification and the number of layers of the demodulation reference signal DM-RS scrambling code sequence on the downlink antenna port, wherein the transmitting node uses 2 ^N types of the scrambling code identification for at least four downlink antenna ports The values are respectively distinguished from 2 ^N values of the DM-RS scrambling code sequence on each downlink antenna port, where the N is a natural number; a second obtaining unit, configured to obtain a demodulation indication value indicating the demodulation information obtained by the first obtaining unit; a sending unit, configured to send the demodulation indication value acquired by the second acquisition unit to the UE, so that the UE acquires demodulation information according to the demodulation indication value, and transmits the demodulation information to the UE according to the acquired demodulation information performing demodulation processing on the received data on the downlink antenna port allocated to the UE by the transmitting node corresponding to the port identifier; Wherein, the transmitting node further includes: a second judging unit and a rate matching unit; The second judging unit is configured to: when the number of downlink antenna ports allocated to the UE by the transmitting node is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, And when the time-frequency resources occupied by the downlink antenna ports with the number greater than 1 are all the same, determine whether it is necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the UE, wherein the other The time-frequency resource occupied by the downlink antenna port is different from the resource element RE occupied in the frequency domain by the time-frequency resource occupied by the downlink antenna port allocated by the transmitting node; The rate matching unit is configured to: when the second judging unit judges that the downlink data channel of the UE needs to be rate matched on time-frequency resources occupied by other downlink antenna ports, the downlink data channel of the UE performing rate matching on the time-frequency resources occupied by the other downlink antenna ports; The sending unit is further configured to, when the second judging unit judges that rate matching needs to be performed on the downlink data channel of the UE on the time-frequency resources occupied by other downlink antenna ports, send the first reservation to the UE. indication information, wherein the first reservation indication information is used to indicate to the UE that the transmitting node performs rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the UE; Or, the transmitting node further includes: a rate matching unit; The rate matching unit is configured to: when the number of downlink antenna ports allocated to the UE by the transmitting node is 1, or the number of downlink antenna ports allocated to the UE by the transmitting node is greater than 1, and When the time-frequency resources occupied by the downlink antenna ports with the number greater than 1 are all the same, perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the UE, wherein the other downlink antenna ports occupy The time-frequency resource of is different from the resource element RE occupied in the frequency domain by the time-frequency resource allocated to the downlink antenna port by the transmitting node. 15. The transmitting node according to claim 14, characterized in that, The second acquiring unit is specifically configured to: acquire the demodulation indication value from a pre-stored indication table according to the demodulation information. 16. The transmitting node according to claim 15, characterized in that, The pre-stored instruction table includes: a single codeword instruction table and a double codeword instruction table; The transmitting node also includes: A first judging unit, configured to judge whether the transmitting node uses single-codeword transmission or dual-codeword transmission for the UE; The second obtaining unit is specifically configured to: when the first judging unit judges that the transmitting node uses a single codeword for transmission to the UE, select the single codeword indication table according to the demodulation information Obtain the demodulation indication value; when the first judging unit judges that the transmitting node uses dual codeword transmission for the UE, acquire the demodulation information from the dual codeword indication table Demodulate the indicated value. 17. The transmitting node according to claim 14, wherein when the second judging unit judges that it is not necessary to perform rate matching on the time-frequency resources occupied by other downlink antenna ports for the downlink data channel of the UE , then send second reservation indication information to the UE, where the second reservation indication information is used to indicate to the UE that the transmitting node does not use the other downlink antenna for the downlink data channel of the UE Rate matching is performed on the time-frequency resources occupied by the port. 18. The transmitting node according to claim 14 or 17, characterized in that, The sending unit is specifically configured to: send the first reservation indication information to the UE through downlink control information DCI or a radio resource control RRC message. 19. The transmitting node according to any one of claims 14 to 17, characterized in that, The sending unit is specifically configured to: send the demodulation indication value obtained by the second obtaining unit to the UE by using DCI or RRC with a size not smaller than 4 bits. 20. A user equipment, characterized by comprising: a receiving unit, configured to receive a demodulation indication value from a transmitting node; An obtaining unit, configured to obtain demodulation information corresponding to the demodulation indication value according to the demodulation indication value received by the receiving unit, wherein the demodulation information includes: used to indicate that the transmitting node is allocated to The port identifier corresponding to the downlink antenna port used by the user equipment is used to determine the scrambling code identifier and the number of layers of the demodulation reference signal DM-RS scrambling code sequence on the downlink antenna port, wherein the transmitting node has at least four downlink antenna ports, using 2 ^N values of the scrambling code identifier to distinguish 2 ^N values of the DM-RS scrambling code sequence on each downlink antenna port, wherein the N is a natural number; A demodulation processing unit, configured to demodulate the received data on the downlink antenna port assigned to the UE by the transmitting node corresponding to the port identifier according to the demodulation information obtained by the obtaining unit; Wherein, the receiving unit is further configured to receive first reservation indication information from the transmitting node, wherein the first reservation indication information is used to indicate to the user equipment that the transmitting node Rate matching is performed on the time-frequency resources occupied by other downlink antenna ports, where the time-frequency resources occupied by the other downlink antenna ports are the same as the time-frequency resources allocated to the downlink antenna ports by the transmitting node The resource element RE occupied by the resource in the frequency domain is different; The user equipment also includes: a rate matching unit, configured to perform rate matching on the time-frequency resources occupied by the other downlink antenna ports on the downlink data channel of the user equipment when the receiving unit receives the first reservation indication information; Or, the receiving unit is also used for: receiving second reservation indication information from the transmitting node, wherein the second reservation indication information is used to indicate to the UE that the transmitting node does not use the other downlink data channel for the UE Rate matching is performed on the time-frequency resources occupied by the antenna ports. 21. The user equipment according to claim 20, characterized in that, The acquiring unit is specifically configured to: acquire demodulation information corresponding to the demodulation indication value from a pre-stored indication table according to the demodulation indication value received by the receiving unit. 22. The user equipment according to claim 21, characterized in that, The pre-stored instruction table includes: a single codeword instruction table and a double codeword instruction table; The user equipment also includes: a judging unit, configured to judge whether the transmitting node currently uses single-codeword transmission or dual-codeword transmission for the UE; The obtaining unit is specifically configured to: when the judging unit judges that the transmitting node uses a single codeword for transmission to the user equipment, according to the demodulation indication value, obtain from the single codeword indication table Demodulation information corresponding to the demodulation indication value; when the judging unit judges that the transmitting node uses double codeword transmission for the user equipment, according to the demodulation indication value, from the double codeword The demodulation information corresponding to the demodulation indication value is obtained from the indication table.