WO2017070942A1

WO2017070942A1 - Downlink control information transmission method and device, and communication system

Info

Publication number: WO2017070942A1
Application number: PCT/CN2015/093377
Authority: WO
Inventors: 周华; 郤伟
Original assignee: 富士通株式会社; 周华; 郤伟
Priority date: 2015-10-30
Filing date: 2015-10-30
Publication date: 2017-05-04

Abstract

A downlink control information transmission method and device, and a communication system. The transmission method comprises: a base station sending downlink control information for multiple user superposition transmission, wherein the downlink control information comprises control information about a first user equipment and control information about a second user equipment for performing multiple user superposition transmission with the first user equipment. Thus, the influence of a user equipment on a DCI decoding behaviour in an existing system can be avoided as far as possible, and the signalling complexity is not increased.

Description

Transmission method, device and communication system for downlink control information

Technical field

The present invention relates to the field of communications technologies, and in particular, to a downlink control information (DCI, Downlink Control Information) transmission method, apparatus, and communication system.

Background technique

Cellular networks based on Long Term Evolution (LTE)/LTE-A (LTE Advanced) communication technology are getting more and more commercial deployments and applications. More and more intelligent terminals are efficient and fast through LTE networks and the world. access. At the same time, other terminals are gradually being intelligentized. For example, the Internet of Things (IoT) also needs to transmit data through the network deployed in the wide area. As a wireless carrier and equipment provider, how to provide more capacity or coverage on limited network resources will be an eternal problem.

In recent years, a new wireless transmission technology: Multi-user Superposition Transmission (MUST) has gradually attracted the interest of researchers and started globally in the 3rd Generation Partnership Project (3GPP). This technology was introduced in standardized communication protocols.

FIG. 1 is a schematic diagram of multi-user superimposed transmission. As shown in FIG. 1 , the basic principle of MUST is that a base station (for example, an eNB) schedules two user equipments (UE, User Equipment) in different locations to use the same physical resource (time domain). And the frequency domain), by allocating different transmission powers, the near-end user equipment (such as UE2 in FIG. 1) can detect the signal transmitted to the remote user equipment (such as UE1 in FIG. 1).

Since the power of the signal sent to the remote user equipment is high, the receiving power to the near-end user equipment side is also high, and the near-end user equipment (UE2) can detect the signal of the UE1 relatively accurately, and receive the signal. The detected signal of UE1 is subtracted from the total signal, and the remaining signal is UE2 and other noise and interference signals, and the signal sent to UE2 can be detected by using the conventional signal detection method.

For the remote user equipment (UE1), although the data of the near-end user equipment is also transmitted on the same physical resource, since the power transmitted to the near-end user equipment is low, the power is very low when reaching the remote user equipment. It can be considered that there is not much impact on the signal detection of the remote user equipment. Therefore, the throughput of the system can be improved by simultaneously transmitting signals of two user equipments on the same physical resource.

MUST technology can obtain capacity gain depending on the following information: need to ensure that the base station sends to two user settings The standby signal has a difference in received power. For example, two user equipments need to be placed at a distance of one distance. In addition, the near-end user equipment also needs to obtain control information of the remote user equipment.

For example, the near-end user equipment needs to obtain the Modulation Coding Scheme (MCS) of the remote user equipment to eliminate the interference of the remote user equipment by using an appropriate interference cancellation algorithm. The near-end user equipment also needs to obtain the resource block allocation (RBA) information of the remote user equipment, so that the data of the remote user equipment can be correctly detected. If the RBs of the two user equipments occupy the same, the system should also be in the system. Clearly indicated in the signaling.

Further, in order to use in a multi-antenna system, the Precoding Matrix Index (PMI) of the signal sent to the remote user equipment should also be notified to the near-end user equipment. If the two user equipments use the same PMI, It should also be clearly indicated in the system signaling.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

The inventor found that the downlink control information of the remote user equipment (including the MCS, RBA, PMI, etc. listed above) is very useful for the near-end user equipment. However, in the existing LTE communication system, the downlink control information of each user equipment is sent to a specific user equipment, for example, the downlink control information is sent to a specific user equipment through a Physical Downlink Control Channel (PDCCH). . If the base station needs to notify the near-end user equipment of the control information of the remote user equipment, special indication signaling is required, which will result in an increase in signaling complexity.

Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting downlink control information. Try to avoid the impact of user equipment on the DCI decoding behavior in the existing system, and it will not lead to an increase in signaling complexity.

According to a first aspect of the embodiments of the present invention, a method for transmitting downlink control information includes:

The base station sends downlink control information for performing multi-user overlay transmission; wherein the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment.

According to a second aspect of the embodiments of the present invention, there is provided a transmission apparatus for downlink control information, where the transmission apparatus includes:

An information sending unit that transmits downlink control information for performing multi-user overlay transmission; wherein the downlink control information includes control information of the first user equipment and a second user equipment that performs multi-user overlay transmission with the first user equipment Control information.

According to a third aspect of the embodiments of the present invention, a method for transmitting downlink control information includes:

Receiving, by the second user equipment, downlink control information, which is sent by the base station, for performing multi-user superimposed transmission, where the downlink control information includes control information of the second user equipment and multi-user superimposed transmission with the second user equipment Control information of the first user equipment;

Obtaining control information of the first user equipment and control information of the second user equipment from the downlink control information.

According to a fourth aspect of the present invention, a device for transmitting downlink control information is provided in a second user equipment that performs multi-user overlay transmission with a first user equipment, where the transmission device includes:

An information receiving unit, which receives downlink control information, which is sent by the base station, for performing multi-user superimposed transmission, where the downlink control information includes control information of the first user equipment and control information of the second user equipment;

An information obtaining unit that obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.

According to a fifth aspect of the embodiments of the present invention, a communication system is provided, the communication system comprising:

a base station, which transmits downlink control information for performing multi-user superimposed transmission; wherein the downlink control information includes control information of the first user equipment and control information of the second user equipment;

The first user equipment performing multi-user overlay transmission with the second user equipment;

The second user equipment receives the downlink control information sent by the base station, and obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.

According to still another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when the program is executed in a user equipment, the program causes a computer to perform the downlink as described in the third aspect above in the user equipment Control method of transmission of information.

According to still another aspect of the embodiments of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information according to the third aspect above in a user equipment .

According to still another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when executed in a base station When the program is executed, the program causes a computer to execute the transmission method of the downlink control information as described in the first aspect above in the base station.

According to still another aspect of the embodiments of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information according to the first aspect above in a base station.

The beneficial effects of the embodiment of the present invention are that the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprises"

DRAWINGS

Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. In order to facilitate the illustration and description of some parts of the invention, the corresponding parts in the figures may be enlarged or reduced.

Elements and features described in one of the figures or one embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

Figure 1 is a schematic diagram of multi-user overlay transmission;

2 is a schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention;

3 is another schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention;

4 is another schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a method for transmitting downlink control information according to Embodiment 2 of the present invention; FIG.

6 is a schematic diagram of a downlink control information transmission apparatus according to Embodiment 3 of the present invention;

7 is a schematic diagram of a base station according to Embodiment 3 of the present invention;

8 is a schematic diagram of a downlink control information transmission apparatus according to Embodiment 4 of the present invention;

9 is a schematic diagram of a user equipment according to Embodiment 4 of the present invention;

Figure 10 is a diagram showing the communication system of Embodiment 5 of the present invention.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

Example 1

The embodiment of the invention provides a method for transmitting downlink control information, which is described from the base station side. FIG. 2 is a schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 2, the transmission method includes:

Step 201: The base station sends a DCI for performing multi-user overlay transmission, where the DCI includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment.

In this embodiment, the scenario shown in FIG. 1 is taken as an example for description. The first user equipment (UE1) is a remote user equipment, and the second user equipment (UE2) is a near-end user equipment; UE1 and UE2 perform multi-user overlay transmission. However, the present invention is not limited thereto and can be applied to other scenarios.

In this embodiment, the base station may send the DCI including the control information of the UE1 and the control information of the UE2 to the UE2 through the PDCCH. In addition, when receiving the data sent by the base station, the UE2 can relatively accurately detect the signal sent to the UE1 according to the control information of the UE1, and then subtract the signal sent to the UE1 from the data, and then can detect the signal by using the traditional method. Signal sent to UE2.

In this embodiment, the control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information. However, the present invention is not limited thereto, and may be other downlink control information, for example.

Therefore, in the embodiment of the present invention, by including the control information of the UE1 and the control information of the UE2 in one DCI, not only the control information of the UE1 can be sent to the UE2 to perform the MUST, but the UE-side blind detection PDCCH is not added. Complexity, and does not increase the complexity of signaling.

In this embodiment, the DCI of the specific format may be DCI format 2/2a/2b/2c/2d, but the present invention is not limited thereto, and may be, for example, DCI of other formats. The following describes the DCI including the control information of two user equipments in the embodiment of the present invention by using the DCI format 2 as an example.

Table 1 shows schematically some of the fields contained in DCI format 2:

Table 1

As shown in Table 1, the DCI includes fields corresponding to two Transmission Blocks (TBs), that is, the MCS of the first transport block (TB1), the New Data Indicator (NDI), and the redundancy version information (RVI). , Redundancy Version Information), and the MCS, NDI, and RVI of the second transport block (TB2), in addition to the transport block to codeword swap flag Field and PMI field.

In this embodiment, the foregoing field may be used to carry the control information of the UE1 and the control information of the UE2, so that the control information of the two UEs may be included in one DCI. That is, the fields corresponding to the two TBs in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.

For example, when the value of the Transport block to codeword swap flag in the DCI is 1, the field corresponding to TB1 is used to transmit the control information of the UE1, and the field corresponding to the TB2 is used to transmit the control information of the UE2; or, in the DCI When the value of the Transport block to codeword swap flag is 0, the field corresponding to TB1 is used to transmit the control information of UE2, and the field corresponding to TB2 is used to transmit the control information of UE1.

In this embodiment, the base station may configure the DCI by using RRC (Radio Resource Control) signaling, where the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; Or indicating that the DCI having the specific format includes the control information of the UE 2. That is, the UE can correctly understand whether the received DCI is control information including only one UE or control information including two UEs.

Thereby, the conventional DCI and the DCI of the embodiment of the present invention can be flexibly configured statically. However, the present invention is not limited thereto. For example, the RRC signaling configuration may not be used, and the DCI is pre-agreed to include control information of two UEs.

The TB2 in the DCI format 2 is used to carry the control information of the UE1, and the TB1 in the DCI format 2 is used to carry the control information of the UE2, but the DCI format 2 in the DCI format 2 is used for the following. The invention is not limited thereto.

In an embodiment, the base station may statically notify the UE2 through RRC signaling: when detecting the PDCCH carrying the specific format DCI, the UE2 needs to understand according to the DCI including control information of, for example, two UEs.

FIG. 3 is another schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 3, the transmission method includes:

Step 301: The base station sends RRC signaling for configuring DCI to UE2.

In this embodiment, after the UE2 receives the RRC signaling, the DCI of the specific format is understood as follows: the control information of the two user equipments (the near-end user equipment and the remote user equipment) is carried at the same time, instead of only Carry control information for a single user device.

Step 302: The base station sends a DCI to the UE2, where the DCI includes control information of the UE1 and UE2. Control information.

Step 303: The UE2 acquires control information of the UE1 and control information of the UE2 from the DCI.

In this embodiment, the UE2 may perform multi-user superimposed transmission using the obtained control information of the two UEs, and obtain data sent by the base station to the UE2.

Step 304: The base station sends, to the UE2, the RRC signaling for de-configuring the DCI, where the signaling is used to indicate the previously configured DCI for multi-user overlay transmission to be DCI for single-user transmission;

In this embodiment, after receiving the RRC signaling, the UE2 will understand the DCI of a specific format as follows: only the control information of a single user equipment (ie, UE2 itself) is carried. Step 304 is an optional step, and the base station determines whether to send the RRC signaling according to whether it needs to fall back to single-user transmission.

For example, the meaning of each field in the DCI format 2 in the embodiment of the present invention is as follows:

In addition, for transport block 1: is a TB sent to UE2;

-Modulation and coding scheme–5bits(MCS)- is the MCS sent to UE2;

-New data indicator - 1 bit (NDI) - is the NDI sent to UE2;

-Redundancy version–2bits (RVI) - is the RVI sent to UE2;

In addition, for transport block 2: is a TB sent to UE1;

-Modulation and coding scheme–5bits(MCS)- is the MCS sent to UE1;

-New data indicator - 1 bit (NDI) - is the NDI sent to UE1;

-Redundancy version–2bits (RVI) - is the RVI sent to UE1;

-Precoding information (PMI) is the PMI used by UE1 and UE2 at the same time, and the PMI corresponds to the PMI when one codeword is transmitted.

For other fields in DCI format 2, no changes can be made, and reference can be made to the prior art.

In addition, one TB (TB1) in the DCI can carry control information of the UE (UE2) that receives the DCI, and for another TB (TB2) in the DCI, it is no longer determined whether it is enabled in the manner of the existing system. (Enable), specifically, in the existing system, when the MCS of TB2 = 0, and the RVI of the TB2 is 1, the TB2 is judged to be disabled. In the embodiment of the present invention, the TB2 is determined to correspond to the control information of the UE1.

Therefore, through a new dedicated RRC signaling, the UE2 configured with the MUST capability can understand the TB2-related information as the transmission control information of the MC1 of the UE1, so that the UE2 is fast. Obtain information such as the MCS of UE1.

In another embodiment, the base station may semi-statically notify the UE2 through RRC signaling: when detecting the PDCCH carrying the specific format DCI, the UE2 may understand, according to the DCI, including control information of, for example, two UEs, or may follow the The DCI contains a UE's control information to understand. And, in a case where the DCI satisfies a predetermined condition, the UE 2 understands that the DCI includes, for example, control information of two UEs.

FIG. 4 is another schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 4, the transmission method includes:

Step 401: The base station sends RRC signaling for configuring DCI to the UE2.

In this embodiment, after receiving the RRC signaling, the UE2 can understand the DCI of the specific format as the control information of the two user equipments (the near-end user equipment and the remote user equipment), and can also be in a specific format. The DCI is understood to carry control information of only a single user equipment.

Step 402: The base station sends a DCI to the UE2, where the DCI includes control information of the UE1 and control information of the UE2.

In this embodiment, the DCI including the control information of the two UEs needs to meet certain preset conditions, and the specific content about the preset conditions is as described later.

Step 403, UE2 determines that the DCI meets a preset condition;

Step 404: The UE2 acquires control information of the UE1 and control information of the UE2 from the DCI.

In this embodiment, if the DCI meets the preset condition, the DCI includes control information of two UEs, and if the DCI does not satisfy the preset condition, the DCI includes control information of one UE. Therefore, the UE2 can accurately determine whether to acquire control information of one UE or control information of two UEs according to whether the DCI satisfies a preset condition.

Step 405: The base station sends, to the UE2, the RRC signaling for canceling the DCI configuration, where the signaling is used to indicate the previously configured DCI for multi-user overlay transmission to be DCI for single-user transmission; step 405 is an optional step, the base station is Whether to transmit the RRC signaling is determined according to whether it is necessary to fall back to the single user transmission.

In this embodiment, after the UE2 receives the RRC signaling, the DCI of the specific format is understood as follows: only the control information of the single user equipment (UE2 itself) is carried.

In the present embodiment, the preset condition may be a bit combination of certain fields in the DCI, but the present invention is not limited thereto.

In one mode, the predetermined condition may include: a coded modulation mode (MCS) of a certain transport block in the DCI The value is 0 to 28 (when the system does not support 256QAM, for example, the value of MCS is 0 to 28, which can be 0 or 28) or 0 to 27 (when the system supports 256QAM, such as MCS) The value is 0 to 27, which can be 0 or 27), and the new data indication (NDI) of the transport block is not toggled; the specific meaning of whether the NDI is flipped can refer to the related technology. .

In addition, for transport block 1: is a TB sent to UE2;

-Modulation and coding scheme–5bits(MCS)- is the MCS sent to UE2;

-New data indicator - 1 bit (NDI) - is the NDI sent to UE2;

-Redundancy version–2bits (RVI) - is the RVI sent to UE2;

In addition, for transport block 2: is a TB sent to UE1;

-Modulation and coding scheme - 5 bits (MCS) - is the MCS sent to UE1; wherein the value of the MCS is 0 to 28 (when the system does not support 256QAM), or 0 to 27 (when the system supports 256QAM);

-New data indicator - 1 bit (NDI) - is the NDI sent to UE1; wherein the NDI is not flipped;

-Redundancy version–2bits (RVI) - is the RVI sent to UE1;

For other fields in DCI format 2, no changes can be made, and reference can be made to the prior art. When the combination of MCS and NDI of TB2 is not {0-28 (not supporting 256QAM) or 0-27 (supporting 256QAM), and does not flip}, the DCI only carries control information of one user equipment.

In another mode, the predetermined condition includes: a coded modulation mode (MCS) of a certain transport block in the DCI is 29 to 31 (when the system does not support 256QAM) or 28 to 31 (when the system supports 256QAM) And the new data indication (NDI) of the transport block is not toggled; the specific meaning of whether the NDI is flipped can be referred to the related art.

In addition, for transport block 1: is a TB sent to UE2;

-Modulation and coding scheme–5bits(MCS)- is the MCS sent to UE2;

-New data indicator - 1 bit (NDI) - is the NDI sent to UE2;

-Redundancy version–2bits (RVI) - is the RVI sent to UE2;

In addition, for transport block 2: is a TB sent to UE1;

-Modulation and coding scheme - 5 bits (MCS) - is the MCS sent to UE1; wherein the value of the MCS is 29 to 31 (when the system does not support 256QAM), or 28 to 31 (when the system supports 256QAM);

-Redundancy version–2bits (RVI) - is the RVI sent to UE1;

For other fields in DCI format 2, no changes can be made, and reference can be made to the prior art. When the combination of MCS and NDI of TB2 is not {29~31 (256QAM is not supported) or 28~31 (supports 256QAM), and does not flip}, the DCI only carries control information of one user equipment.

In addition, when the step 403 determines that the DCI meets the preset condition, one TB (TB1) in the DCI may carry control information of the UE (UE2) that receives the DCI; for another TB (TB2) in the DCI, Then, according to the manner of the existing system, it is judged whether it is enabled. Specifically, in the existing system, when the MCS of TB2=0, and the RVI of the TB2 is 1, the TB2 is judged as de-energized ( Disable), ie there is no second TB. In the embodiment of the present invention, the TB2 is determined to correspond to the control information of the UE1.

Therefore, by using a new dedicated RRC signaling, the UE having the MUST capability can determine whether the DCI contains another UE according to a specific combination of certain bits in the DCI when receiving the specific DCI. information.

For example, when a specific bit combination occurs in the DCI, the UE receiving the DCI understands the control information of one TB in the DCI as its own control information, and the control information of the other TB as the control information of another UE, and A MUST related receiving algorithm can be performed. When a specific bit combination does not appear in the DCI, the UE that receives the DCI can understand the DCI according to the control signaling format of the existing system, that is, the DCI only carries the control information sent to the UE.

Compared with the static notification method shown in FIG. 3, the method shown in FIG. 4 can be more flexibly in MUST and Traditional orthogonal transmission techniques are switched between, and there is no need to increase the number of blind detections at the UE side.

The DCI format 2 is used as an example. For DCI format 2a/2b/2c/2d, a similar design can be used to carry the UE receiving the DCI (such as the near-end user equipment) by using information such as MCS of one TB in the DCI. The control information of the UE2) uses information such as the MCS of another TB in the DCI to carry control information of another UE (such as the remote user equipment UE1) during the MUST transmission.

As shown in the foregoing embodiment, the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.

Example 2

The embodiment of the invention provides a method for transmitting downlink control information, which is described from the user equipment side; wherein the near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user superposition transmission. The same content of the embodiment of the present invention and the first embodiment will not be described again.

FIG. 5 is a schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 5, the transmission method includes:

Step 501: The UE2 receives the DCI sent by the base station for performing multi-user superimposed transmission, where the DCI includes control information of the UE1 and control information of the UE2.

Step 502: The UE2 obtains control information of the UE1 and control information of the UE2 from the DCI.

Therefore, when receiving the data transmitted by the base station, the UE2 can detect the signal sent to the UE1 according to the control information of the UE1, and after subtracting the signal sent to the UE1 from the data, can detect the signal sent to the UE2 itself. .

In this embodiment, the UE2 may receive the RRC signaling sent by the base station for configuring the DCI. The RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; or indicate that the DCI having the specific format includes the control information of the UE2.

In this embodiment, the control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information. However, the present invention is not limited thereto, and other control information may be included.

In this embodiment, the fields corresponding to the two transport blocks in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.

In this embodiment, the UE2 may also determine whether the DCI satisfies a predetermined condition; the DCI satisfies a predetermined condition. In the case of the UE2, the UE2 obtains the control information of the UE1 and the control information of the UE2 from the DCI; if the DCI does not satisfy the predetermined condition, the UE2 obtains the control information of the UE2 from the DCI.

The predetermined condition may include, for example, that the MCS of a certain transport block (for example, TB2) in the DCI has a value of 0 to 28 or 0 to 27, and the NDI of the transport block is not inverted; or, a certain transmission in the DCI. The MCS of the block (e.g., TB2) has a value of 29 to 31 or 28 to 31, and the NDI of the transport block is not flipped.

Example 3

The embodiment of the invention provides a transmission device for downlink control information, which is configured in a base station; wherein the near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user superposition transmission. The embodiment of the present invention corresponds to the method for transmitting downlink control information described in Embodiment 1, and the same content is not described herein again.

FIG. 6 is a schematic diagram of a downlink control information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 6, the downlink control information transmission apparatus 600 includes:

The information transmitting unit 601 transmits a DCI for performing multi-user superimposed transmission; wherein the DCI includes control information of the UE1 and control information of the UE2 that performs multi-user superimposed transmission with the UE1.

As shown in FIG. 6, the transmission device 600 for downlink control information may further include:

The signaling sending unit 602 sends RRC signaling for configuring DCI.

In an embodiment, the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; or indicate that the DCI having the specific format includes the control information of the UE2.

For example, when the value of the Transport block to codeword swap flag in the DCI is 1, the field corresponding to the first transport block (TB1) is used to transmit the control information of the UE1, corresponding to the second transport block (TB2). The field is used to transmit the control information of the UE2; or, when the value of the Transport block to codeword swap flag in the DCI is 0, the field corresponding to the first transport block is used to transmit the control information of the UE2, corresponding to the second transmission. The fields of the block are used to transmit control information of UE1.

In this embodiment, in the case where the value of the MCS of a certain transport block (for example, TB2) in the DCI is 0 and the value of the RVI is 1, the information corresponding to the transport block is the control information of the UE1.

In this embodiment, the precoding information in the DCI is PMI information commonly used by UE1 and UE2.

In another embodiment, the DCI may include control information of the UE1 and control information of the UE2 if the DCI satisfies a predetermined condition.

The embodiment of the invention further provides a base station, which is provided with the downlink control information transmission device 600 as described above.

FIG. 7 is a schematic diagram of a structure of a base station according to an embodiment of the present invention. As shown in FIG. 7, base station 700 can include a central processing unit (CPU) 200 and memory 210; and memory 210 is coupled to central processing unit 200. The memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200.

The function of the transmission device 600 of the downlink control information may be integrated into the central processing unit 200. The central processing unit 200 can be configured to implement the transmission method of the downlink control information as described in Embodiment 1.

In addition, as shown in FIG. 7, the base station 700 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and are not described herein again. It should be noted that the base station 700 also does not have to include all the components shown in FIG. 7; in addition, the base station 700 may further include components not shown in FIG. 7, and reference may be made to the prior art.

Example 4

The embodiment of the invention provides a downlink control information transmission device, which is configured in a near-end user equipment (UE2) in. The near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user overlay transmission. The embodiment of the present invention corresponds to the method for transmitting downlink control information described in Embodiment 2, and the same content is not described herein again.

FIG. 8 is a schematic diagram of a downlink control information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 8, the downlink control information transmission apparatus 800 includes:

The information receiving unit 801 is configured to receive, by the base station, a DCI for performing multi-user superimposed transmission, where the DCI includes control information of the UE1 and control information of the UE2.

The information acquisition unit 802 obtains control information of the UE1 and control information of the UE2 from the DCI.

As shown in FIG. 8, the transmission device 800 for downlink control information may further include:

The signaling receiving unit 803 receives the RRC signaling sent by the base station for configuring the DCI.

The condition determining unit 804 determines whether the DCI satisfies a predetermined condition;

The information obtaining unit 802 is further configured to obtain control information of the UE1 and control information of the UE2 from the DCI if the DCI satisfies the predetermined condition.

The predetermined condition may include: the value of the MCS of a certain transport block (for example, TB2) in the DCI is 0 to 28 or 0 to 27, and the NDI of the transport block is not reversed; or, a certain transmission in the DCI The MCS of the block (e.g., TB2) has a value of 29 to 31 or 28 to 31, and the NDI of the transport block is not flipped.

The embodiment of the invention further provides a user equipment, and the transmission device 800 configured with the downlink control information described above.

FIG. 9 is a schematic diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 9, the user device 900 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of the transmission device 800 of the downlink control information may be integrated into the central processor 100. The central processing unit 100 can be configured to implement the transmission method of the downlink control information as described in Embodiment 1.

In another embodiment, the downlink control information transmission device 800 can be configured separately from the central processing unit 100. For example, the downlink control information transmission device 800 can be configured as a chip connected to the central processing unit 100, and controlled by the central processing unit. The function of the transmission device 800 that implements downlink control information.

As shown in FIG. 9, the user equipment 900 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a memory 140, a camera 150, a display 160, and a power source 170. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 900 does not have to include all the components shown in FIG. 9, and the above components are not required; in addition, the user equipment 900 may further include components not shown in FIG. There are technologies.

Example 5

The embodiment of the present invention further provides a communication system, and the same contents as those of Embodiments 1 to 4 are not described herein.

FIG. 10 is a schematic diagram of a communication system according to an embodiment of the present invention. As shown in FIG. 10, the communication system 1000 includes: a base station 1001, a first user equipment 1002, and a second user equipment 1003.

The base station 1001 sends a DCI for performing multi-user superimposed transmission; the DCI includes control information of the first user equipment 1002 and control information of the second user equipment 1003; the first user equipment 1002 and the second user equipment 1003 perform multi-user Superimposed transmission; and the second user equipment 1003 receives the DCI sent by the base station 1001, and obtains control information of the first user equipment 1002 and control information of the second user equipment 1003 from the DCI.

In this embodiment, the second user equipment 1003 is further configured to: receive data sent by the base station 1001. When the signal sent to the first user equipment 1002 is detected according to the control information of the first user equipment 1002, and the signal sent to the first user equipment 1002 is subtracted from the data, the second user equipment can be detected and sent. 1003 own signal.

An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute a transmission method of downlink control information as described in Embodiment 2 in the user equipment.

An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a transmission method of downlink control information as described in Embodiment 2 in a user equipment.

An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to perform a transmission method of downlink control information as described in Embodiment 1 in the base station.

An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information as described in Embodiment 1 in a base station.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the invention in accordance with the principles of the invention, which are also within the scope of the invention.

Claims

A transmission device for downlink control information is configured in a base station, where the transmission device includes:

An information sending unit that transmits downlink control information for performing multi-user overlay transmission; wherein the downlink control information includes control information of the first user equipment and a second user equipment that performs multi-user overlay transmission with the first user equipment Control information.
The transmission device of claim 1, wherein the transmission device further comprises:

a signaling sending unit that transmits radio resource control signaling for configuring the downlink control information.
The transmission device according to claim 2, wherein the radio resource control signaling is used to: indicate that the downlink control information having a specific format includes control information of the first user equipment and the second user equipment Control information; or indicating that the downlink control information having a specific format includes control information of the second user equipment.
The transmission device according to claim 1, wherein the control information of the first user equipment comprises one or more of the following information: modulation and coding mode information, resource block allocation information, and precoding matrix indication information.
The transmission device according to claim 1, wherein the fields corresponding to the two transport blocks in the downlink control information are respectively used to carry control information of the first user equipment and control information of the second user equipment.
The transmission apparatus according to claim 5, wherein when a value of a transport block pair codeword exchange flag in the downlink control information is 1, a field corresponding to the first transport block is used to transmit the first user The control information of the device, the field corresponding to the second transport block is used to transmit control information of the second user equipment;

Or, when the value of the transport block pair codeword exchange flag in the downlink control information is 0, the field corresponding to the first transport block is used to transmit control information of the second user equipment, corresponding to the second transmission. The field of the block is used to transmit control information for the first user equipment.
The transmission device according to claim 1, wherein in the case where the value of the coded modulation mode of a certain transport block in the downlink control information is 0 and the value of the redundancy version information is 1, the certain transport block The corresponding information is control information of the first user equipment.
The transmission device according to claim 1, wherein the precoding information in the downlink control information is precoding matrix indication information commonly used by the first user equipment and the second user equipment.
The transmission device according to claim 2, wherein said downlink control information satisfies a predetermined condition The downlink control information includes control information of the first user equipment and control information of the second user equipment.
The transmission device according to claim 9, wherein the predetermined condition comprises: a value of a coded modulation mode of a certain transmission block in the downlink control information is 0 to 28 or 0 to 27, and the certain The new data of the transport block indicates that it has not been flipped;

Alternatively, the coded modulation mode of a certain transport block in the downlink control information takes a value of 29 to 31 or 28 to 31, and the new data indication of the certain transport block is not inverted.
A transmission device for downlink control information is configured in a second user equipment that performs multi-user overlay transmission with a first user equipment, where the transmission device includes:

An information receiving unit, which receives downlink control information, which is sent by the base station, for performing multi-user superimposed transmission, where the downlink control information includes control information of the first user equipment and control information of the second user equipment;

An information obtaining unit that obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.
The transmission device of claim 11, wherein the transmission device further comprises:

And a signaling receiving unit, configured to receive radio resource control signaling sent by the base station to configure the downlink control information.
The transmission device according to claim 12, wherein the radio resource control signaling is used to: indicate that the downlink control information having a specific format includes control information of the first user equipment and the second user equipment Control information; or indicating that the downlink control information having a specific format includes control information of the second user equipment.
The transmission device according to claim 11, wherein the control information of the first user equipment comprises one or more of the following information: modulation and coding mode information, resource block allocation information, and precoding matrix indication information.
The transmission device according to claim 11, wherein the fields of the two transmission blocks in the downlink control information are respectively used to carry control information of the first user equipment and control information of the second user equipment.
The transmission apparatus according to claim 15, wherein when a value of a transport block pair codeword exchange flag in said downlink control information is 1, a field corresponding to said first transport block is used to transmit said first user Equipment Control information corresponding to a field of the second transport block is used to transmit control information of the second user equipment;

Or, when the value of the transport block pair codeword exchange flag in the downlink control information is 0, the field corresponding to the first transport block is used to transmit control information of the second user equipment, corresponding to the second transmission. The field of the block is used to transmit control information for the first user equipment.
The transmission device of claim 12, wherein the transmission device further comprises:

a condition determining unit that determines whether the downlink control information satisfies a predetermined condition;

The information acquiring unit is further configured to: obtain, after the downlink control information meets the predetermined condition, control information of the first user equipment and control of the second user equipment from the downlink control information information.
The transmission device according to claim 17, wherein the predetermined condition comprises: a value of a coded modulation mode of a certain transmission block in the downlink control information is 0 to 28 or 0 to 27, and the certain The new data of the transport block indicates that it has not been flipped;

Alternatively, the coded modulation mode of a certain transport block in the downlink control information takes a value of 29 to 31 or 28 to 31, and the new data indication of the certain transport block is not inverted.
A communication system, the communication system comprising:

a base station, which transmits downlink control information for performing multi-user superimposed transmission; wherein the downlink control information includes control information of the first user equipment and control information of the second user equipment;

The first user equipment performing multi-user overlay transmission with the second user equipment;

The second user equipment receives the downlink control information sent by the base station, and obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.
The communication system according to claim 19, wherein the second user equipment is further configured to: when receiving the data sent by the base station, detect, according to the control information of the first user equipment, that the sending is sent to the first A signal of a user equipment, and subtracting a signal sent to the first user equipment from the data, and detecting a signal sent to the second user equipment.