WO2011009367A1

WO2011009367A1 - Method for sending, transmitting and receiving mcch information and transmission system thereof

Info

Publication number: WO2011009367A1
Application number: PCT/CN2010/074765
Authority: WO
Inventors: 苟伟; 马子江
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-07-20
Filing date: 2010-06-30
Publication date: 2011-01-27
Also published as: CN101959136A; WO2011009378A1; CN101959136B

Abstract

A method for sending, transmitting and receiving Multicast Control Channel (MCCH) information and a transmission system thereof are disclosed. The method for sending MCCH information involves: a sending side allocates independent resources for MCCH information, bears the MCCH information on the independent resources, and sends it to a receiving side in every repetition period of the MCCH information; wherein among the independent resources, besides the resources occupied by system information, control information and pilot data, of which the receiving side is aware, the rest of the recourses is merely used to transmit the MCCH information. In the solution, the reliability of receiving MCCH information has been enhanced.

Description

MCCH information transmission, transmission and reception method and transmission system

Technical field

The present invention relates to a Long Term Evolution (LTE) system, and particularly to a method for transmitting, transmitting, and receiving information of a Multicast Control Channel (MCCH), and a transmitting end, a receiving end, and a transmitting system.

Background technique

With the rapid development of the Internet and the popularity of large-screen multi-function mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have emerged, such as video conferencing, television broadcasting, video on demand, advertising, online education, interactive games, and the like. This aspect meets the rising business needs of mobile users and brings new business growth points to mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time, and have the characteristics of large data volume, long duration, and delay sensitivity compared with general data services.

In order to effectively utilize mobile network resources, 3rd Generation Partnership Project ( 3rd Generation

The Partnership Project (3GPP) proposes a Multimedia Broadcast Multicast Service (MBMS), which is a technology that transmits data from one data source to multiple targets, and implements the network (including the core network). The sharing of resources with the access network improves the utilization of network resources (especially air interface resources). MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile The trend of data development provides a better business prospect for the development of 3G.

In LTE, the MBMS service can be transmitted in a hybrid carrier mode. The hybrid carrier mode means that the unicast service (Unicast) and the multicast service (MBMS) are transmitted on the same carrier in a time division multiplexing manner, and the minimum unit of time division multiplexing is used. For sub-frames. Currently, LTE specifies that a two-level method is used to configure radio frames and subframes carrying MBMS, as described below:

The first level implements the radio frame configuration carrying the MBMS, and satisfies the following equation SFN mod radioFrameAllocationPeriod = radioFrameAllocationOffset. The SFN is the abbreviation of the system frame number system frame number, that is, the system's wireless frame number, from 0 to 1023. The radioFrameAllocationPeriod indicates a Multicast Broadcast Single Frequency Network (MB SFN) radio frame period, which can take any one of {1, 2, 4, 8, 16, 32}. The radioFrameAllocationOffset indicates the offset of the MBSFN radio frame, which is an integer and is smaller than the value of the selected MBSFN radio frame period, and is greater than or equal to zero. Mod indicates that the SFN modulo or spare the radioFrameAllocationPeriod. The above-described configuration is to carry an MBMS radio frame called an MBSFN radio frame.

The second level implements the specific MBMS service in the MBMS radio frame to carry the MBMS service, and uses the bitmap method. The subframe #0 in the Frequency Division Duplex (FDD) mode is specified in the LTE. #4, #5, #9 cannot carry MBMS services. In Time Division Duplex (TDD) mode, subframes #0, #1, #5, and #6 cannot carry MBMS services, so 6-bit bitmaps are used. Describe the remaining 6 subframes that carry the MBMS service. The subframe configuration for carrying the MBMS service in each MBSFN radio frame is the same. Since the two-level configuration signaling is transmitted to the terminal on the Broadcast Control Channel (BCCH), the subframe configuration in the MBSFN radio frame in each BCCH modification period cannot be changed. The above-mentioned subframe in which the MBMS service is carried in the MBSFN radio frame is called an MBSFN subframe, which is also called a multicast subframe.

Currently, the first or two Orthogonal Frequency Division Multiplexing (OFDM) symbols of an MBSFN subframe are used to transmit control information of a Unicast service, also called physical downlink control. A Physical Downlink Control Channel (PDCCH), the remaining resources in the subframe are used to send MBMS services or other services.

The MBSFN radio frame and the MBSFN sub-frame are configured by the existing two-stage method. The configured MBSFN sub-frame constitutes the physical resource for actually transmitting the MBMS service, that is, the Physical Multicast Channel (referred to as the Physical Multicast Channel). For PMCH). The PMCH carries a Multicast Channel (MCH). The MCH is a multicast channel defined by LTE, and is composed of a series of MBSFN subframes configured by a two-stage configuration method. Further, it is not excluded in LTE that these MBSFN subframes can be divided into multiple MCHs by certain rules. For example, a part of the MBSFN subframe in the MBSFN subframe configured through the two-stage system is used as the MCH1. The remaining MBSFN subframes are used as MCH2.

Then, MCCH information (hereinafter referred to as MCCH information, that is, multicast control information) should be allocated resources on the MCH. How to transmit and receive is an urgent problem to be solved. Summary of the invention

The technical problem to be solved by the present invention is to provide a method for transmitting, transmitting and receiving MCCH information, and a transmitting end, a receiving end and a transmitting system, so that the receiving end can receive MCCH information by means of joint decoding, and improve the reliability of MCCH information receiving. Sex.

In order to solve the above technical problem, the present invention provides a method for transmitting MCCH information, including: a transmitting end allocates an independent resource for MCCH information, and carries the MCCH information on the independent resource, in each MCCH information. The repetition period is sent to the receiving end;

The remaining resources are only used to transmit MCCH information except for the system information, control information, and resources occupied by the pilot data.

The above transmission method can also have the following characteristics:

The independent resource is one or more subframes.

The above transmission method can also have the following characteristics:

If the subframe is an MBSFN subframe, the remaining resources are the first or two orthogonal frequency divisions for the physical downlink control channel (PDCCH) transmission set by the transmitting end in the MBSFN subframe. Using OFDM symbols other than (OFDM) symbols;

If the subframe is a unicast subframe, the remaining resources are other than the first one or two or three or four OFDM symbols for the PDCCH transmission set in the MBSFN subframe. OFDM symbol.

The above transmission method can also have the following characteristics:

The independent resources are also PRBs, or OFDM symbols, or subcarriers.

The above transmission method can also have the following characteristics:

Before the sending end sends the MCCH information to the receiving end, the method further includes: The transmitting end informs the receiving end of the resource location of the MCCH information in the subframe by signaling. The above transmission method can also have the following characteristics:

In the step of carrying the MCCH information on the independent resource, if the TB formed by the MCCH information cannot fill the resource for transmitting the MCCH information, the MCCH information is generated by filling the MCCH information by using the padding data at the MAC layer. After the MAC PDU is output to the physical layer, the corresponding TB is filled with the subframe.

The above transmission method can also have the following characteristics:

Transmitting, by the sending end, the MCCH information on the independent resource, in the step of sending a repetition period of each MCCH information to the receiving end, the MCCH information adopting a MAC service data unit in the independent resource The form carries the bearer transmission while identifying the MCCH information using a pre-agreed logical channel.

In order to solve the above technical problem, the present invention provides a method for transmitting MCCH information, including: a transmitting end allocates an independent resource for MCCH information, and carries the MCCH information on the independent resource, in each MCCH information. a repetition period is sent to the receiving end;

The receiving end receives and parses the MCCH information, and if the MCCH information cannot be correctly decoded, the MCCH information received in the multiple repetition periods is jointly decoded to obtain the content of the MCCH information;

The above transmission method can also have the following characteristics:

The independent resources are subframes, or PRBs, or OFDM symbols, or subcarriers.

The above transmission method can also have the following characteristics:

If the independent resource is a PRB, or an OFDM symbol, or a subcarrier, before the sending end sends the MCCH information to the receiving end, the method further includes: the sending end notifying the receiving by signaling Ending the MCCH information in a resource location of the subframe;

Before the receiving end receives and parses the MCCH information, the method further includes: the receiving end learns, by using the signaling, the resource location of the MCCH information in a subframe, and further receives the The MCCH information.

The above transmission method can also have the following characteristics:

In order to solve the above technical problem, the present invention provides a method for receiving MCCH information, including: receiving, and parsing, MCCH information sent by a transmitting end, if the MCCH information cannot be correctly decoded, receiving the multiple repetition periods The MCCH information is jointly decoded to obtain the content of the MCCH information.

In order to solve the above technical problem, the present invention provides a transmitting end of MCCH information, including an allocation module and a sending module.

The allocation module is configured to: allocate independent resources for the MCCH information, and carry the MCCH information on the independent resources;

The sending module is configured to: send the MCCH information to the receiving end in a repetition period of each MCCH information.

In order to solve the above technical problem, the present invention provides a receiving end of MCCH information, including a receiving module and a parsing module.

The receiving module is configured to: receive MCCH information sent by the sending end;

The parsing module is configured to: parse the MCCH information, and if the MCCH information is not correctly decoded, perform joint decoding on the MCCH information received in the multiple repetition periods to obtain the content of the MCCH information.

In order to solve the above technical problem, the present invention provides a transmission system of MCCH information, including a transmitting end and a receiving end.

The sending end is configured to: allocate an independent resource for the MCCH information, and carry the MCCH information on the independent resource, and send it to the receiving end in a repetition period of each MCCH information; the receiving end is configured to: Receiving and parsing the MCCH information, if the MCCH letter is If the information cannot be correctly decoded, the MCCH information received in the multiple repetition periods is jointly decoded to obtain the content of the MCCH information.

The present invention uses the independent resources to transmit MCCH information, so that the receiving end can distinguish which resources carry the MCCH information in the physical layer, so that the physical layer can jointly decode the MCCH information received by the repetition period of the multiple MCCH information. Improve the reliability of MCCH information reception. BRIEF abstract

1 is a flowchart of a method for transmitting MCCH information according to an embodiment of the present invention;

2 is a schematic diagram of allocating an independent subframe for MCCH information;

3 is a schematic diagram of allocating two independent subframes for MCCH information;

4 is a schematic diagram of a subframe shared by MCCH information and other services;

FIG. 5 is a schematic diagram of allocating MCCH information to the MCCH information for the first subframe of the MCCH information, and the second subframe and other services are multiplexed. Preferred embodiment of the invention

The basic idea of the present invention is to configure independent resources for MCCH information transmission, for example, configuring independent subframes or partial resources within a subframe to transmit only MCCH information.

The known system information, control information, and resources occupied by the pilot data should be removed from the independent resources. The remaining resources are only used to transmit MCCH information, so that the physical layer can know exactly which MCCH information is carried. On the physical resources. Do not mix MCCH information with other service data, for example, do not mix MCCH information and MTCH data in one transport block (TB, Transport Block).

In this way, by configuring the MCCH information to configure independent resources for transmission, and then in the TB chunk, the MCCH information is not mixed with other MTCH data in one TB, and the receiving end can be in the object. The physical layer distinguishes the received MCCH information (for example, it can know which data belongs to the MCCH information and which data does not belong to the MCCH information), and the receiving end can utilize the received multiple transmitted MCCH information (the MCCH information has a repetition period) Each repetition period sends the same MCCH information, or different copies of the same MCCH information, and each copy can independently parse the MCCH information for soft combining (ie, joint decoding) to improve MCCH information transmission robustness. Improve the reliability of the terminal receiving MCCH information. At the same time, since the resources and data of the MCCH information are independent, an independent MCS (modulation and coding scheme) can be configured for the MCCH information to improve the efficiency and reliability of the MCCH information transmission without affecting other data. Transmission efficiency. For example, since the MCCH information is control information, in order to improve reliability, a low modulation mode and a low coding rate need to be configured, and the MTCH is not required. However, since the MCCH information and other MTCH data are mixed together, in order to ensure reliable MCCH information. Sex, it is necessary to configure the MCS of the MCCH information, which reduces the transmission efficiency of the MTCH.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1, the method for transmitting MCCH information in the embodiment of the present invention includes the following steps: Step 101: A transmitting end allocates an independent resource for MCCH information, and carries the MCCH information on the independent resource, where The repetition period of the MCCH information is sent to the receiving end; Step 102, the receiving end receives and parses the MCCH information, and if the MCCH information cannot be correctly decoded, the MCCH information received in multiple repetition periods is combined. Decoding, obtaining the content of the MCCH information.

Specifically, the receiving end receives the MCCH information in the Nth MCCH information repetition period, and performs decoding. If the decoding is correct, the MCCH information is acquired. Otherwise, the MCCH information received this time is stored, and the N+1 is received. When MCCH information repeats, MCCH information is received, and decoding is performed. If the decoding is correct, the MCCH information is acquired. Otherwise, the MCCH information received by the Nth and N+1 MCCH information repetition periods is jointly decoded. The main reason here is that the MCCH information of the MCCH repetition period is unchanged, so it can be known that the corresponding resource location should be the same data information. For example, a simple method of adding and subtracting two received data is divided into half and then sent for decoding. The soft combining method is currently mature, for example, using bit-level merging, or symbol-level merging, etc., and will not be described here. The system resources, the control information, and the resources occupied by the pilot data that are known by the receiving end should be removed from the independent resources, and the remaining resources are only used to transmit the MCCH information. That is to say, MBMS service data, dynamic scheduling information, and the like cannot be transmitted in the independent resources.

The process in which the sending end carries the MCCH information on the independent resource, if the TB formed by the smaller amount of the MCCH information cannot fill the resource for transmitting the MCCH information, the media access control ( The Medium Access Control (MAC) layer fills the MAC PDU generated by the MCCH information with padding. After the MAC PDU is output to the physical layer, the corresponding TB fills the subframe.

The transmitting end may be a base station or a relay station, and the receiving end may be a relay station or a terminal.

Method 1, the independent resource is a subframe

Allocating independent subframes is only used to transmit MCCH information. At this time, other service data is not allowed to be transmitted inside these subframes, except for control information on known resources in the subframe, such as PDCCH and some MAC CE (Medium Access Control Control Element). Control unit of the medium access control))) Control information in the form of, or system information on a known resource in a subframe, such as BCCH, or pilot data in a subframe.

The subframes may be one or more.

If the subframe is an MBSFN subframe, the transmitting end sets the first one or two OFDM symbols of the MBSFN subframe for transmitting Physical Downlink Control Channel (PDCCH) data, and the remaining OFDM symbol transmission MCCH. Information

If the subframe is a non-MBSFN subframe (ie, a unicast subframe), the transmitting end sets the unicast residual OFDM symbol transmission MCCH information.

In the first mode, when the amount of MCCH information data is small, in order to ensure that the TB formed by the MCCH information can fill the MBSFN resource of one MBSFN subframe, it can be ensured by padding in the Medium Access Control (MAC) layer. A TB composed of MCCH information or MCCH information can fill the MBSFN resource of the allocated subframe. When the physical layer allocates one or more subframes for transmitting the MCCH information, the MAC layer enters the MCCH information. When the MAC packet is grouped, it is possible to know how much data can be transmitted by one or more subframes. If the MCCH information cannot be filled with one or more subframes at this time, a certain amount of adding is filled.

In order to ensure that the TB formed by the MCCH information can fill the data field of a non-MBSFN subframe, the operation is the same as the process of filling the MBSFN subframe. The padding of the MAC layer can be used to ensure that the TB composed of the MCCH information or the MCCH information can be Fills the data field of the allocated subframe.

There are multiple ways of data transmission at the MAC layer. The data transmission of the control plane uses the MAC CE mode, and the data transmission of the user plane uses the MAC SDU mode. The MCCH information is the data of the control plane and should be used by the MAC CE. However, the MCE CE is not very convenient in terms of the data of the bearer length change. For example, most of the MAC CEs are of fixed length, and the MCCH information is variable length. . In order to better fit the transmission of the MCCH information, in the subframe allocated to the MCCH information in the present invention, the MCCH information may be carried in the form of a MAC SDU (Service Data Unit). And the MCCH information is identified by using a logical channel identity that is previously agreed upon.

Mode 2, the independent resource is a Physical Resource Block (PRB), or an OFDM symbol, or a subcarrier, and the like.

In mode 2, the present invention also provides another way to further divide the resources in the subframe into a plurality of smaller parts, for example, into multiple PRBs, or OFDM symbols, or subcarriers. Of course, the resources in a sub-frame can also be divided into a number of smaller other types of resources, which are not enumerated here. In summary, resources within one subframe need to be further divided into multiple partial resources. Thus, according to the present invention, after the resources in the subframe are divided, one or more partial resources in the allocated subframe transmit only the MCCH information. At this time, some of the resources allocated to the MCCH information are not allowed to transmit other service data, except that known control information such as PDCCH, or broadcast system information such as BCCH, or pilot data is transmitted on these partial resources.

In the mode 2, before the sending end sends the MCCH information to the receiving end, the sending end also informs the receiving end that the MCCH information of the receiving end is in the resource position of the subframe.

In mode 2, it is not necessary to ensure that all the MBSFN resources in the allocated subframe of the MCCH information or the MCCH information are not filled in the MAC layer, and only need to be filled in the subframe to be allocated to the subframe. The resources of the MCCH information may be used. For resources that do not send MCCH information in the subframe, it may be used to transmit other data or remain idle.

The transmission system of the MCCH information in the embodiment of the present invention includes a transmitting end and a receiving end, where the sending end is configured to allocate an independent resource for the MCCH information, and carry the MCCH information on the independent resource, where The repetition period of each MCCH information is sent to the receiving end; the receiving end is configured to receive and parse the MCCH information, and if the MCCH information cannot be correctly decoded, the MCCH information received in multiple repetition periods is combined. Decoding, obtaining the content of the MCCH information;

The sending end of the MCCH information in the embodiment of the present invention includes an allocating module and a sending module, where the allocating module is configured to allocate independent resources for the MCCH information, and carry the MCCH information on the independent resource;

The sending module is configured to send the MCCH information to the receiving end in a repetition period of each MCCH information.

The receiving end of the MCCH information in the embodiment of the present invention includes a receiving module and a parsing module, where the receiving module is configured to receive MCCH information sent by the sending end;

The parsing module is configured to parse the MCCH information, and if the MCCH information cannot be correctly decoded, jointly perform MCCH information received in multiple repetition periods to jointly obtain the content of the MCCH information.

The invention is further illustrated below with specific application examples.

Application example 1

It is specified in LTE R9 that the MCCH information must be carried in the MBSFN manner in the MBSFN subframe. (Of course, in future versions, there may be MCCH information in non-MBSFN subframes. Non-MBSFN mode transmission) This allocates a certain number of MBSFN subframes for transmitting only MCCH information. The current MBSFN subframe has a total of 12 OFDM symbols, and the first one or two OFDM symbols are used to transmit control information (PDCCH) of the unicast service. For the remaining resources, the MBMS service, including the MCCH information, is currently specified.

Currently, the LTE R9 specifies that the MCCH information is transmitted according to the repetition period. It is possible to further introduce the modification period of the MCCH information. A modification period generally includes multiple repetition periods, and the MCCH information is allowed to be updated when each modification period comes. We only want to transfer the MCCH information in one repetition period, and the other repetition periods and modification periods can be operated in the same way. Refer to Figures 2 and 3.

At the physical layer, when the timing of the repetition period of the MCCH information arrives, one or more MBSFN subframes are allocated for the MCCH information to carry only the MCCH information, and the specific allocation of several subframes needs to be determined according to the data amount of the MCCH information. Then, the MCCH information obtained from the upper layer is directly mapped to the MBSFN resource for transmitting the MBMS service in the allocated one or more MBSFN subframes. At this time, one or more MBSFN subframes only carry MCCH information, and no longer carry other service data, such as MTCH, DSI information, and the like. The MBSFN resources allocated for one or more MBSFN subframes carrying the MCCH information in this application example are filled with MCCH information or the MCCH information plus some padding are filled and filled.

Here, the following MCCH information is added to the MAC layer above the physical layer.

The MCCH is a logical channel, and the data of the MCCH at the MAC layer can be processed as follows. At the MAC layer, each logical channel may have its own logical channel identifier, and according to the logical channel identifier, multiple MAC service data units (SDUs) belonging to the same logical channel are connected (the connection rules may refer to existing ones). Protocol), which constitutes a MAC PDU (PDU, Protocol Data Unit). A MAC PDU should contain several MAC SDUs. According to the size of the physical resources, and the modulation mode and coding rate, the MAC PDUs are transmitted according to the size of the physical resources. Reverse the conversion of how much data the MAC PDU packet should contain, and then calculate how many MAC SDUs the data should consist of. If a MAC PDU is connected to an integer number of MAC SDUs and cannot be filled with physical resources through calculation, it can be filled with padding to fill the physical resources. Source, here can not exceed the carrying capacity of physical resources. The grouping of MAC PDUs in the above manner ensures that the MAC PDU contains only MCCH information and may also include padding. After the MAC PDU is output to the physical layer, corresponding to one TB of the physical layer, the TB uses a corresponding modulation mode, and after encoding, it can fill the subframe allocated to the MCCH information. Since padding is padded according to certain rules, the receiving end can resolve which MCCH information and which are padding through anti-rules.

This makes it possible to allocate independent subframes for only transmitting MCCH information. The receiving end obtains the MCCH information by using the corresponding control information, and the receiving end can calculate the MCCH information after being calculated in the subframes, and then parse the information, if not correctly decoded, Then, the MCCH information received last time or the MCCH information to be received next time may be soft combined and decoded. Since soft combining is a prior art, it will not be described here.

Application example 2

The purpose of application example 2 is the same as that of application example 1. However, the specific method of application is slightly different. It can be seen that application example 1 is to ensure MAC PDU output by the MAC layer after padding in the MAC layer (called TB in the physical layer). ), can fill MBSFN resources in one sub-frame. The application method 2 is to be applied in such a way that only a small amount of padding needs to be filled in the MAC layer, and it is ensured that the TB after the output of the MAC PDU can fill a part of the resources in the full sub-frame, and this part of the resource is only used to transmit the MCCH information. Independent resources. Some of the remaining resources in the subframe can be used to transmit other services, and of course can remain idle. Some resources may be some PRBs, or some OFDM symbols, or some subcarriers.

It is not difficult to see that application example 1 requires MCCH information to be padded to fill a sub-frame, and application example 2 only needs to be able to fill the resources allocated to the MCCH information in the sub-frame.

In order to apply the integrity of the example, a way of dividing the resources by the subframe is given here, and other ways are not enumerated. In summary, the application example 2 emphasizes that the MCCH information is allowed to be transmitted using part of the resources of the subframe. For example, a sub-frame is divided into multiple PRBs, and PRB is a time-frequency two-dimensional resource block formed by the time direction and the frequency direction. To match the specific example, we give a PRB of a specific size, when the sub-frame uses a standard cyclic prefix. (Normal Cyclic Prefix), PRB consists of 7 OFDM symbols and 12 subcarriers. When the subframe uses Extended Cyclic Prefix, the PRB consists of 6 OFDM symbols and 12 subcarriers. PRB in LTE R8/R9 be consistent. In addition, here we give a preferred PRB size as the PRB definition of the invention. When the subframe uses the standard cyclic prefix, the PRB selects 14 OFDM symbols and 12 subcarriers. When the subframe uses the extended loop When the prefix is used, the PRB selects 12 OFDM symbols and 12 subcarriers. At this time, when the PRB is used to carry data, it is necessary to remove resources that carry important information such as system information, control information, and pilot data.

The following is a case where the MCCH information occupies one subframe. Refer to the variation of Application Example 2 when the MCCH information occupies multiple sub-frames. Refer to Figure 4.

At the physical layer, when the timing of the repetition period of the MCCH information and/or the timing of the modification period comes, some MBSFN intra-frame resources (for example, some PRBs) are allocated at the MCCH information period to carry MCCH information, and several PRBs are specifically allocated. , need to be determined according to the amount of data of the MCCH information. The MCCH information is then directly mapped to these PRBs within the allocated MBSFN subframe for transmission.

The processing of the MAC layer is similar to the application example 1 except that the amount of padding padding at this time is determined by the ability to fill these PRBs. The application example 1 is determined according to the resources used for the MBMS service in the MBSFN subframe. I won't go into details here.

This makes it possible to allocate independent resources and only transmit MCCH information. The receiving end acquires, by using the corresponding control information, which part of the resources (actually those PRBs) in the subframe are carrying the MCCH information, and the receiving end can obtain the corresponding MCCH information in the subframes, and then parse the information, if If the decoding is not correct, the MCCH information received last time or the MCCH information to be received next time may be soft combined and decoded. Since soft combining is a prior art, it will not be described here.

Application example 2 variant

At the physical layer, when the repetition period of the MCCH information and/or the timing of the modification period comes, multiple MBSFN subframes are allocated to carry the MCCH information at the MCCH information period, because the MCCH information is too much, one subframe is not enough to bear. MCCH information. Therefore, the previous MBSFN subframe can be used in the manner of Application Example 1, and the last subframe can be used in the application example 2. Refer to Figure 5.

The processing at the receiving end is also combined with Application Example 1 and Application Example 2, and details are not described herein again. The invention may, of course, be embodied in various other forms and modifications without departing from the spirit and scope of the invention. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

The present invention uses the independent resources to transmit MCCH information, so that the receiving end can distinguish which resources carry the MCCH information in the physical layer, so that the physical layer can jointly decode the MCCH information received by the repetition period of the multiple MCCH information. Improve the reliability of MCCH information reception.

Claims

Claim

A method for transmitting multicast control channel (MCCH) information, including:

The transmitting end allocates an independent resource for the MCCH information, and carries the MCCH information on the independent resource, and sends the MCCH information to the receiving end in a repetition period of each MCCH information;

2. The transmitting method according to claim 1, wherein

The independent resource is one or more subframes.

3. The transmitting method according to claim 2, wherein

If the subframe is a multicast broadcast single frequency network (MBSFN) subframe, the remaining resources are the first one of the MBSFN subframes that is set by the transmitting end for physical downlink control channel (PDCCH) transmission. Or 2 OFDM symbols other than Orthogonal Frequency Division Multiplexing (OFDM) symbols;

4. The transmitting method according to claim 1, wherein

The independent resources are physical resource blocks (PRBs), or OFDM symbols, or subcarriers.

5. The transmitting method according to claim 4, wherein

Before the sending end sends the MCCH information to the receiving end, the method further includes: the sending end notifying, by the sending end, the resource location of the MCCH information in the subframe by the receiving end.

6. The transmitting method according to any one of claims 1 to 5, wherein

In the step of transmitting, by the sending end, the MCCH information on the independent resource, if the transport block (TB) formed by the MCCH information cannot fill the resource for transmitting the MCCH information, pass the media access control ( The MAC) layer fills the MAC protocol data unit (PDU) generated by the MCCH information with padding data, and after the MAC PDU is output to the physical layer, the corresponding TB is filled with the subframe.

7. The transmitting method according to any one of claims 1 to 6, wherein

8. A method for transmitting multicast control channel (MCCH) information, comprising:

9. The transmission method according to claim 8, wherein

The independent resources are subframes, or physical resource blocks (PRBs), or orthogonal frequency division multiplexing (OFDM) symbols, or subcarriers.

10. The transmission method according to claim 9, wherein

Before the step of receiving and parsing the MCCH information by the receiving end, the method further includes: the receiving end, by using the signaling, knowing, by using the signaling, a resource location of the MCCH information in a subframe.

The transmission method according to any one of claims 8 to 10, wherein

12. A method for receiving multicast control channel (MCCH) information, comprising: receiving, by a receiving end, parsing and parsing MCCH information sent by a transmitting end, and if the MCCH information cannot be correctly decoded, receiving the multiple repeated cycles. The MCCH information is jointly decoded to obtain the content of the MCCH information.

13. A transmitting end of multicast control channel (MCCH) information, comprising: an allocation module and a sending module,

14. A receiving end of multicast control channel (MCCH) information, comprising a receiving module and an analyzing module,

15. A transmission system for multicast control channel (MCCH) information, comprising a transmitting end and a receiving end,

The sending end is configured to: allocate an independent resource for the MCCH information, and carry the MCCH information on the independent resource, and send it to the receiving end in a repetition period of each MCCH information; the receiving end is configured to: Receiving and parsing the MCCH information, if the MCCH information cannot be correctly decoded, jointly decoding the MCCH information received in the multiple repetition periods to obtain the content of the MCCH information;