WO2011017820A1

WO2011017820A1 - Method and corresponding equipment for transmitting mbms messages

Info

Publication number: WO2011017820A1
Application number: PCT/CN2009/000917
Authority: WO
Inventors: 汪勇刚; 陈宇; 晁华; 王河
Original assignee: 上海贝尔股份有限公司; 阿尔卡特朗讯
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2011-02-17
Also published as: CN102396246B; CN102396246A

Abstract

A method for transmitting Multimedia Broadcast Multicast Service (MBMS) messages is provided in the present invention, which includes the following steps: a transmission period, offset and subframe allocation bitmap of a radio frame where a Multicast Channel(MCH) exists are defined; a radio frame subframe configuration signaling containing the transmission period, offset and subframe allocation bitmap is generated; an index related to the transmission period, offset and subframe allocation bitmap is set; a radio frame allocation bitmap corresponding to the MCH is determined according to whether the MCH exists or not in every transmission period of time defined by the transmission period and offset; a radio frame configuration signaling containing the index and radio frame allocation bitmap is generated; the radio frame subframe configuration signaling and radio frame configuration signaling are sent. The present invention provides substantially a more advanced Multicast Channel Subframe Allocation Pattern (MSAP) design solution. Usage in MBMS transmission of the format, which is more flexible, with less granularity, simpler and uses less bits, is enabled by using the solution of the present invention.

Description

Message transmission method for MBMS and corresponding device thereof

The present invention relates to a multicast broadcast service, and more particularly to a message transmission method for MBMS in an LTE system and a corresponding device thereof. Background technique

In the 3GPP RAN2#66, the control plane of the Multimedia Broadcast Multicast Service (MBMS) is discussed. After the meeting, email discussions on the topic continued. In these discussions, the Multicast Channel (MCH) Subframe Allocation Pattern (MSAP) is considered to be included in the Broadcast Control Channel (BCCH) and/or the MBMS Control Channel (MBMS). Parameters in Control Channel, MCCH). However, the signaling design for MSAP has not yet been determined.

In the current 36.331, the specific configuration of the Multicast Broadcast Single Frequency Network (MBSFN) subframe allocation defined in Systemlnfo wakeupB ckType2 (system information type 2, SIB2) is as follows: MBSFN-SubframeConfigList ::= SEQUENCE (SIZE

( 1..maxMB SFN- Allocations)) OF MBSFN-SubframeConfig

MBSFN-SubframeConfig ::= SEQUENCE {

radioframeAllocationPeriod ENUMERATED (nl , n2, n4, n8, nl 6, n32} ,

radioframeAllocationOffset INTEGER (0..7),

subframeAllocation CHOICE {

oneFrame BIT STRING (SIZE(6)), fourFrames BIT STRING (SIZE(24))

} Since the MBSFN subframe is used for MBMS transmission or relay transmission between the eNB and the relay station, the UE can determine the MBMS or the MBMS based on the MBSFN subframe allocation signaling. All subframes of the relay. However, the UE still needs to know which subframes are used for the MCCH/MTCH. The existing scheme is to map both the MCCH and the MTCH onto the MCH, so the UE can use the MSAP to determine the corresponding subframe for the MCCH or MTCH.

At present, some companies have put forward their own proposals for MSAP signaling design. Some of them will be introduced below.

1. R2-093702 proposed by Datang Telecom

In this proposal, Datang Telecom proposed the idea of 'periodic (OP) + offset (OP) + MSAP bitmap'.

In this proposal, the parameters for MSAP transmitted on the BCCH/MCCH can be in the following format -

- Subframe bitmap, 6 bits or 24 bits;

- the radio frame offset value, in the range 0-7;

- Wireless frame transmission period, the range is FFS.

The range of the transmission period is FFS, because MCCH and MTCH can be different. If the period and offset of the MSAP are the same as those of the MBSFN, in order to reduce the signaling credit, the period and offset of the MSAP may not be indicated in the RRC (Radio Resource Control) signaling. Therefore, the period and offset should be any Information Element (IE) in the RRC message. It should be noted that for LTE R9, if there is no overlapping MBSFN area, the offset is unnecessary.

For example, as shown in Fig. 1, it is assumed that the radio frame transmission period = 20 ms, offset = 0, and subframes #2, #3, #7, and #8: are used for MBSFN (i.e., bitmap = '011.011 '). The transmission period and offset of the MSAP are equivalent to the radio frame transmission period and offset of the MBSFN subframe, and the subframes #3 and #8 are used for the MCH.

The problem with this proposal is that it is impossible to indicate aperiodic radio frame allocation for a specific MCH, and it is also impossible to indicate that, for example, a specific MCH occupies the lower half of MBSFN-SubframeConfig, that is, the radio frame offset is greater than 7.

2. Samsung proposed R2-093833

Samsung proposed in this proposal that each (P) MCH uses a configurable number of consecutive subframes allocated to a set other than the MBSFN area. As shown in Figure 2, for each (P) MCH, only a single parameter, ie start, size or end, needs to be signaled. The problem with this proposal is: For each MCH, as long as there is more than one Subframe Allocation Pattern (SAP) in SIB2, the MSAP must span two or more SAPs. However, SAP is actually only used to distinguish between different MBSFNs, so people do not want to mix them in one MCH.

3. Rising R2-093895

ZTE proposed in the proposal: MSAP includes one or more sets of MBSFN-SubframeConfiglist, and selects all frames and partial sub-frames in each set.

As shown in FIG. 3, the MSAP includes a first set {period, offset }, a second set {period, an offset }, and a third set {period, offset }. In addition, the proposal also recommends using the bitmap method to select all MBSFN subframes. This is because some MBSFN frames in each set will introduce unnecessary complexity, and a new set with another {cycle, offset} can achieve the same purpose.

The problem with this solution is that the MBSFN-SubframeConfiglist has been determined during the system configuration phase and does not change over time as the MCH definition needs. In addition, the granularity of all the frames in the set assigned to one MCH is too large. For example, in most common cases, SIB2 with 32 radio frames has only one SAP, and thus the granularity is lbit/s/Hz * 20 MHz * ( 1 subframe I 6subframe) = 3.333 Mbits/s. Even if a new set can be configured with another {cycle, offset}, it will increase the burden on the BCCH, which is also undesirable.

Non-patent literature:

[1] 3GPP TS 36.331 V8.6.0 (2009-06)

[2] R2-093702, "MSAP signalling design", CATT, 3 GPP TSG RAN WG2 meeting #66bis, Los Angeles, USA, 29 Jun - 3 Jul, 2009

[3] R2-093833, "Further eMBMS control plane details", Samsung, 3GPP TSG-RAN2#66b meeting, Los Angelos, U.S.A, 29 June- 3 July 2009

[4] R2-093895, "MSAP configuration", ZTE Corporation, 3GPP TSG-RAN WG2 Meeting #66bis, 29 June - 03 July, Los Angeles, USA The present invention has been made in view of the above problems.

According to an aspect of the present invention, a message transmission method for MBMS is provided, including: defining a transmission period, an offset, and a subframe allocation bitmap of a radio frame in which an MCH is located; generating carrying the transmission period, an offset, and a subframe. Assigning a radio frame subframe configuration signaling of the bitmap; setting an index associated with the transmission period, the offset, and the subframe allocation bitmap; whether the MCH exists according to each transmission period defined by the transmission period and the offset Determining a radio frame allocation bitmap corresponding to the MCH; generating radio frame configuration signaling carrying the index and radio frame allocation bitmap; and transmitting the radio frame subframe configuration signaling and radio frame configuration signaling.

Preferably, the radio frame is an MBSFN radio frame.

Preferably, the step of determining a radio frame allocation bitmap corresponding to the MCH according to whether the MCH exists in each transmission period defined by the transmission period and the offset comprises: determining a bit of the radio frame allocation bitmap according to the transmission period And determining a value of each bit of the radio frame allocation bitmap according to whether the MCH exists in each transmission period defined by the transmission period and the offset.

According to another aspect of the present invention, a message transmission method for MBMS is provided, the method comprising the steps of: receiving radio frame subframe configuration signaling and radio frame configuration signaling from a base station; configuring from a radio frame subframe Extracting a transmission period, an offset, and a subframe allocation bitmap of the radio frame in which the MCH is located in the signaling; extracting an index and a radio frame allocation associated with the transmission period, the offset, and the subframe allocation bitmap from the radio frame configuration signaling a bitmap; and determining the placement of the MCH based on the extracted transmission period, offset, subframe allocation bitmap, and radio frame allocation bitmap. :'.

According to another aspect of the present invention, a base station for MBMS transmission is provided, including: a defining unit, configured to define a transmission period, an offset, and a subframe allocation bitmap of a radio frame in which the MCH is located; and an index setting unit, And setting an index associated with the transmission period, the offset, and the subframe allocation bitmap; the radio frame allocation bitmap determining unit determines, according to whether the MCH exists in each transmission period defined by the transmission period and the offset a radio frame allocation bitmap corresponding to the MCH; a signaling generating unit, configured to generate a radio frame subframe configuration signaling carrying the transmission period, the offset, and the subframe allocation bitmap, and carrying the index and the radio frame allocation bitmap Radio frame configuration signaling; and a signaling sending unit that transmits the radio frame subframe configuration signaling and radio frame configuration signaling. According to still another aspect of the present invention, a UE for MBMS transmission is provided, where the UE includes: a receiving unit, configured to receive radio frame subframe configuration signaling and radio frame configuration signaling from a base station; A transmission period, an offset, and a subframe allocation bitmap for extracting a radio frame in which the MCH is located from the radio frame subframe configuration signaling, and extracting a transmission period, an offset, and a subframe allocation bit from the radio frame configuration signaling An associated index and radio frame allocation bitmap; and an MCH location determining unit configured to determine a location of the MCH based on the extracted transmission period, offset, subframe allocation bitmap, and radio frame allocation bitmap.

In summary, the present invention provides a MAP that is more flexible, has a smaller granularity, is simpler, and uses fewer bits, so that a specific MCH can occupy any radio frame and any subframe defined by the MBSFN-SubframeConfigList in SIB2. . DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from the description

Figure 1 shows an existing MCH subframe allocation scheme;

Figure 2 shows an existing MCH subframe allocation scheme;

Figure 3 shows an existing MCH subframe allocation scheme;

4 is a block diagram showing a base station for MBMS message transmission in accordance with a first embodiment of the present invention;

FIG 5 shows a flowchart of a method for transmitting the MBMS message to the first embodiment of the base station according to the present ^invention;:

6 shows an MCH subframe allocation scheme according to a first embodiment of the present invention; FIG. 7 shows a UE block diagram for MBMS message transmission according to a first embodiment of the present invention;

Figure 8 is a flow chart showing a method for MBMS message transmission in a UE according to a first embodiment of the present invention. detailed description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, some specific embodiments are for illustrative purposes only, and should not be construed as limiting the invention in any way. It is only an example of the invention.

Because MBSFN radio frames for transmission between the relay MBMS transmission or eNB and the relay station, MBSFN radio frame for MBMS transmission embodiment will be described below as an example embodiment ₀

[First Embodiment]

In the first embodiment of the present invention, it is assumed that subframes allocated to, for example, relay transmission have been indicated in SIB2 signaling, and subframe allocation signaling can be omitted.

In this case, MSAP is defined as:

MSAP-SubframeConfiguration ::= SEQUENCE (SIZE (L.maxMBSFN- Allocations)) OF SEQUENCE {

radioframeAllocationSeqlndex INTEGER (1..8),

radioframeAllocationBitMap BIT STRING (SIZE(l), SIZE(2), SIZE(4), SIZE(8), SIZE(16), or SIZE(32)),

}

Fig. 4 is a block diagram showing a base station for MBMS transmission according to the first embodiment of the present invention. As shown, the base station includes a defining unit 401 for defining a transmission period, an offset, and a subframe allocation bitmap of a radio frame in which the MCH is located; an index setting unit 403, configured to set and transmit a period, an offset, and a subframe. Assigning an index associated with the bitmap; a radio frame allocation bitmap determining unit 405, determining a radio frame allocation corresponding to the MCH according to whether the MCH exists in each transmission period defined by a transmission period and an offset a bitmap generating unit 407, configured to generate radio frame subframe configuration signaling that carries the transmission period, offset, and subframe allocation bitmap, and radio frame configuration signaling that carries the index and radio frame allocation bitmap And a signaling sending unit 409, configured to send the radio frame subframe configuration signaling and the radio frame configuration signaling. The MCH can occupy any subframe in any radio frame.

The radio frame allocation bitmap determining unit 403 includes: a bitmap bit number determining unit configured to determine a bit number of the radio frame allocation bitmap according to the transmission period; and a bitmap value determining unit configured to be used according to the transmission period and the offset The MCH is present in each defined transmission period to determine the value of each bit of the radio frame allocation bitmap.

The MBMS transmission method performed by the base station according to the first embodiment of the present invention will be described below. Line description.

FIG. 5 shows a method for MBMS transmission on the base station side according to the first embodiment of the present invention, as shown in FIG.

The method begins in step S501.

In step S503, the defining unit 401 in the base station defines a transmission period, an offset, and a subframe allocation bitmap of the radio frame in which the MCH is located, wherein the MCH can occupy any subframe in any radio frame.

In step S505, the signaling generating unit 407 in the base station generates radio frame subframe configuration signaling carrying the transmission period, offset, and subframe allocation bitmap.

For example, if there are two types of SAP in the SIB2 signaling, the subframe allocation mode, the base station will generate the definition of MBSFN radio frame subframe configuration signaling for the two SAPs, as follows:

MB SFN- SubframeConfigList = SEQUENCE(2) {

MB SFN- SubframeConfig_ 1 = {

radioframeAllocationPeriod n2,

radioframeAllocationOffset 0,

subframeAllocation 0010000100

}

MBSFN-SubframeConfig_2 = {

radioframeAllocationPeriod n4,

radioframeAllocationOffset 3,

subframeAllocation 0011000110

}

Wherein, radioframeAllocationPeriod (n2) indicates the transmission period of the MBSFN radio frame where MCH1 is located, n2 indicates that the transmission period is 20 ms; radioframeAllocationOffset (0) indicates that the offset of the MBSFN radio frame where MCH1 is located is 0; subframeAllocation (0010000100) indicates the MBSFN radio frame A bitmap representation of a subframe allocated for MBMS transmission is specified in advance, and in 10 lms subframes of a 10 ms frame, 1 indicates that it is used for MBMS transmission, and 0 indicates that it is not used for MBMS transmission. In step S507, the index setting unit 403 in the base station sets an index associated with the transmission period, the offset, and the subframe allocation bitmap.

In step S509, the radio frame allocation bitmap determining unit 405 in the base station determines a radio frame allocation bitmap corresponding to the MCH according to whether or not the MCH exists in each transmission period defined by the transmission period and the offset. The step specifically includes: determining a bit number of the radio frame allocation bitmap according to the transmission period; and determining, according to whether the MCH exists in each transmission period defined by the transmission period and the offset, determining each bit of the radio frame allocation bitmap value.

In step S511, the signaling generating unit 407 in the base station generates radio frame configuration signaling carrying the index and the radio frame allocation bitmap.

Here, assuming that there are three MCHs, MCH1, MCH2, and MCH3, respectively, the base station can separately generate radio frame configuration signaling for the three MCHs:

1. The MSAP-SubframeConfiguration of MCH1 is:

MSAP-SubframeConfiguration = SEQUENCE (1) {

radioframeAllocationSeqlndex 1,

radioframeAllocationBitMap 10101010,10111111

}

2. The MSAP-SubframeConfiguration of MCH2 is:

MSAP-SubframeConfiguration = SEQUENCE (1) {

radioframeAllocationSeqlndex 1,

radioframeAllocationBitMap 01010101,01000000

}

3. The MSAP-SubframeConfiguration of MCH3 is:

MSAP-SubframeConfiguration = SEQUENCE (1) {

radioframeAllocationSeqlndex 2,

radioframeAllocationBitMap 1111

}

} It should be noted that the MSAP herein includes one or more sets of MBSFN-SubframeConfiglist, and selects all or part of the frames in each set, and selects all subframes other than _, for example, Relay. The length of the radioframeAllocationBitMap is based on mdioframeAllocationSeqlndex. For example, if -†* mdioframeAllocationSeqlndex in 'MBSFN-Sub frameConfiglist' has a radioframeAllocationPeriod of n2, the BIT STRING of the shell 'J radioframeAllocationBitMap is SIZE (16).

As can be seen from the primitives listed above, radioframeAllocationSeqlndex ( 1 ) indicates that MCH1 uses MBSFN-SubframeConfig_1 in the MBSFN subframe configuration, so that the transmission period of the MBSFN radio frame where MCH1 is located can be obtained = n2, offset=0. , and the subframe allocation bitmap = 0010000100. On this basis, combined with the actual location of MCH1, the radio frame allocation bitmap of MCH1 can be obtained.

As shown in FIG. 6, the left diagonal line indicates the radio frame where MCH1 is located, and the radio frame allocation bitmap corresponding to MCH1 can be determined by determining whether MCH1 exists in each transmission period (n2). Since n2 indicates that the period is 20ms and the total scheduling length is 320ms, only 16bits can be used to indicate that the number of all allocated radio frames in a scheduling length is 320m _S / 20ms = 16. For example, as shown in the figure, there is MCH1 in the first period, so the first bit of the radio frame allocation bitmap of MCH1 is ', and there is no MCH1 in the second period, then the second bit of the radio frame allocation bitmap of MCH1 For <0,, and so on, the radio frame allocation bitmap of MCH1 can be finally obtained, ΙΌΙ Ι Ι Ι ΙΙ MCH2 adopts the same MBSFN subframe configuration as MCH1, @., and the MBSFN radio frame where MCH2 is located can be obtained. The transmission period = n2, offset = 0, and the subframe allocation bitmap = 0010000100.

As shown in Figure 6, the left diagonal line indicates the radio frame where MCH2 is located. Similar to MCH1, the radio frame allocation bitmap '01010101, 01000000' corresponding to MCH2 can be determined by judging whether MCH2 exists in each transmission period (n2).

According to the radioframeAllocationSeqlndex (1) of the MCH3, the MCH3 adopts the MBSFN-SubframeConfig_2 in the MBSFN subframe configuration, so that the transmission period of the MBSFN radio frame where the MCH3 is located = n4, offset = 3, and the subframe allocation bitmap = 0011000110. As shown in FIG. 6, the checkered pattern indicates the radio frame in which the MCH3 is located. Similar to MCH1, the radio frame allocation bitmap '111' corresponding to MCH3 can be determined by judging whether MCH3 exists in each transmission period (n4). Since η4 indicates that the period is 80ms and the total scheduling length is 320ms, it is only necessary to use 4 bits to indicate that the number of all allocated radio frames in a scheduling length is 320ms/80ms=4.

The MBMS transmission method shown in FIG. 5 further includes: the signaling sending unit 409 in the base station transmits the radio frame subframe configuration signaling and the radio frame configuration signaling (step S513). The method ends at step S515.

The apparatus and method for receiving radio frame subframe configuration signaling and radio frame configuration signaling transmitted from the eNB side by the UE side will be specifically described below with reference to FIG. 7 and FIG. 8.

Fig. 7 shows a block diagram of a UE for MBMS transmission according to a first embodiment of the present invention. As shown in the figure, the UE includes: a receiving unit 701, configured to receive radio frame subframe configuration signaling and radio frame configuration signaling from a base station; and an extracting unit 703, configured to extract, from the radio frame subframe configuration signaling a transmission period, an offset, and a subframe allocation bitmap of the radio frame in which the MCH is located, and an index and a radio frame allocation bitmap associated with the transmission period, the offset, and the subframe allocation bitmap extracted from the radio frame configuration signaling; The MCH location determining unit 705 is configured to determine a location of the MCH according to the extracted transmission period, the offset, the subframe allocation bitmap, and the radio frame allocation bitmap.

The extracting unit 703 includes: a radio frame determining unit, configured to determine a radio frame corresponding to the MCH according to the extracted transmission period, the offset, and the radio frame allocation bitmap; and the subframe determining unit, and allocate the bitmap according to the subframe Further determining which subframes in the determined radio frame are used for the MCH.

FIG. 8 shows a method in which a UE receives radio frame subframe configuration signaling and radio frame configuration signaling transmitted from an eNB side. As shown in Figure 8:

The method begins in step S801.

In step S803, the receiving unit 701 in the UE receives radio frame subframe configuration signaling and radio frame configuration signaling from the eNB.

In step S805, the extracting unit 703 in the UE extracts, from the radio frame subframe configuration signaling, a transmission period, an offset, and a subframe allocation bitmap of the radio frame in which the MCH is located, and extracts and transmits the radio frame configuration signaling. Period, offset, and subframe allocation bitmap associated with the cable Quote and radio frame allocation bitmap.

In step S807, the MCH location determining unit 705 in the UE determines the location of the MCH based on the extracted transmission period, offset, subframe allocation bitmap, and radio frame allocation bitmap. The method ends at step S809.

[Second embodiment]

The second embodiment of the present invention differs from the first embodiment only in that: The second embodiment specifies a subframe scheme allocated to the MBMS in MSAP signaling.

For each MCH, the most complete MSAP is defined as follows:

MSAP-SubframeConfiguration ::= SEQUENCE (SIZE (1..maxMB SFN- Allocations)) OF SEQUENCE {

radioframeAllocationSeqlndex INTEGER (1..8),

subframeAllocation CHOICE {

oneFrame BIT STRING (SIZE(6)), fourFrames BIT STRING (SIZE(24))

}

Note: The MSAP here includes one or more sets of MBSFN-SubframeConfigList, and selects all or part of each set, and all or part of the subframes in the selected frame. - It will be discussed below whether the MSAP for one MCH in this embodiment occupies all subframes other than the Relay assigned to the selected frame.

The maximum throughput of MBSFN frames is:

Lbit/s/Hz * 20MHz * (6subframe I 320subframe) = 375 kbits/s.

The transmission rate has a small granularity and is basically equivalent to the transmission rate of an MBMS service. Therefore, with the second embodiment of the present invention, we can specify that all subframes in the MBSFN frame are assigned to one MSAP, and the simplified scheme is also the first embodiment of the present invention. Compared with the first embodiment, the second embodiment allocates the most flexible manner and can represent the pattern of any subframe allocation, but has the disadvantage of occupying more bits than the first embodiment. [Third embodiment]

The third embodiment of the present invention differs from the first embodiment only in that: In the third embodiment, a complete BitMAP is used, that is, BitMAP is 32 bits.

In this case, for each MCH, the most complete MSAP BitMap is defined as follows:

MSAP-SubframeConfiguration ::= {

radioframeAllocationBitMap BIT STRING (SIZE(32)),

}

In general, the MCH corresponds to the SAP (or part thereof) of one SIB2, but does not span two or more SAPs, and its period is always greater than 10ms, the third embodiment uses more bits than the first An embodiment.

In summary, the present invention provides a more advanced MSAP design. With the scheme of the present invention, a more flexible, smaller granularity, simpler, and less bit-based format can be used in MBMS transmission.

The invention has thus far been described in connection with the preferred embodiments. It will be appreciated that various other changes, substitutions and additions can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention is not limited to the specific embodiment described above, but is defined by the appended claims.

Claims

Rights request

A message transmission method for a multimedia broadcast multicast service MBMS, comprising: a transmission period, an offset, and a subframe allocation bitmap of a radio frame in which a multicast channel MCH is defined;

Generating radio frame subframe configuration signaling carrying the transmission period, offset, and subframe allocation bitmap;

Setting an index associated with a transmission period, an offset, and a subframe allocation bitmap;

Determining a radio frame allocation bitmap corresponding to the MCH according to whether the MCH exists in each transmission period defined by a transmission period and an offset;

Generating radio frame configuration signaling carrying the index and radio frame allocation bitmap; and transmitting the radio frame subframe configuration signaling and radio frame configuration signaling.

2. The method according to claim 1, wherein the radio frame is a multicast broadcast single frequency network MBSFN radio frame.

3. The method according to claim 1, wherein the step of determining a radio frame allocation bitmap corresponding to the MCH according to whether the MCH exists in each transmission period defined by a transmission period and an offset comprises:

Determining the number of bits of the radio frame allocation bitmap according to the transmission period;

The value of each bit of the radio frame allocation bitmap is determined based on whether or not the MCH is present in each transmission period defined by the transmission period and the offset.

4. A message transmission method for MBMS of a multimedia broadcast multicast service, the method comprising the steps of:

Receiving radio frame subframe configuration signaling and radio frame configuration signaling from the base station; extracting, from the radio frame subframe configuration signaling, a transmission period, an offset, and a subframe allocation bitmap of the radio frame where the multicast channel MCH is located;

Extracting an index and a radio frame allocation bitmap associated with a transmission period, an offset, and a subframe allocation bitmap from the radio frame configuration signaling;

The location of the MCH is determined based on the extracted transmission period, offset, subframe allocation bitmap, and radio frame allocation bitmap.

5. The method of claim 4, wherein the radio frame is a multicast broadcast Single frequency network MBSFN radio frame.

6. The method according to claim 4, wherein the determining the location of the MCH according to the extracted transmission period, the offset, the subframe allocation bitmap, and the radio frame allocation bitmap comprises:

Determining a radio frame for the MCH based on the extracted transmission period, offset, and radio frame allocation bitmap;

Further determining which of the determined radio frames are used for the MCH is further determined based on the subframe allocation bitmap. ,

A base station for MBMS transmission of a multimedia broadcast multicast service, comprising: a limiting unit, configured to define a transmission period, an offset, and a subframe allocation bitmap of a radio frame in which the multicast channel MCH is located;

An index setting unit, configured to set an index associated with a transmission period, an offset, and a subframe allocation bitmap;

a radio frame allocation bitmap determining unit that determines a radio frame allocation bitmap corresponding to the MCH according to whether the MCH exists in each transmission period defined by a transmission period and an offset;

a signaling generating unit, configured to generate radio frame subframe configuration signaling that carries the transmission period, offset, and subframe allocation bitmap, and radio frame configuration signaling that carries the index and radio frame allocation bitmap;

And a signaling sending unit, configured to send the radio frame subframe configuration signaling and radio frame configuration signaling.

8. The base station according to claim 7, wherein the radio frame is a multicast broadcast single frequency network MBSFN radio frame.

9. The base station according to claim 7, wherein the radio frame allocation bitmap determining unit comprises:

a bitmap bit number determining unit, configured to determine a bit number of the radio frame allocation bitmap according to the transmission period;

And a bitmap value determining unit configured to determine a value of each bit of the radio frame allocation bitmap according to whether the MCH exists in each transmission period defined by the transmission period and the offset.

10. A user equipment UE for MBMS transmission of a multimedia broadcast multicast service, The UE includes:

a receiving unit, configured to receive radio frame subframe configuration signaling and radio frame configuration signaling from a base station;

And an extracting unit, configured to extract, from the radio frame subframe configuration signaling, a transmission period, an offset, and a subframe allocation bitmap of the radio frame where the multicast channel MCH is located, and extract and transmit a period from the radio frame configuration signaling, An index and a radio frame allocation bitmap associated with the offset and subframe allocation bitmap;

The MCH location determining unit is configured to determine a location of the MCH according to the extracted transmission period, the offset, the subframe allocation bitmap, and the radio frame allocation bitmap.

The UE according to claim 10, wherein the radio frame is a multicast broadcast single frequency network MBSFN radio frame.

The UE according to claim 10, wherein the extracting unit comprises: a radio frame determining unit, configured to determine a radio frame for the MCH according to the extracted transmission period, the offset, and the radio frame allocation bitmap;

The subframe determining unit further determines which of the determined radio frames are used for the MCH according to the subframe allocation bitmap.