WO2010015135A1

WO2010015135A1 - A method for transmitting resource configuration information of multimedia broadcast multicast service

Info

Publication number: WO2010015135A1
Application number: PCT/CN2008/073764
Authority: WO
Inventors: 苟伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-08-07
Filing date: 2008-12-26
Publication date: 2010-02-11
Also published as: CN101645783B; CN101645783A

Abstract

A method for transmitting resource configuration information of multimedia broadcast multicast service (MBMS) is provided. The method includes steps of: the signaling structure for indicating resource configuration information of MBMS is appointed by the side of network and user equipment; the signaling structure includes a direction indicating period of the radio frame carrying the MBMS in a modification period of the MBMS area, a direction for the amount of the radio frames allocated to the MBMS area in a modification period, and a direction for the amount of the sub-frames carrying MBMS allocated to each and every radio frame of the MBMS area in a modification period. The signaling structure configured is transmitted according to the appointed mode when it is transmitted by the side of the network, and the signaling structure is analyzed according to the appointed mode by the user equipment after the user equipment receives it. Adopting the present invention, the flexibility of resource allocation can be increased, and the over allocation can be avoided farthest, furthermore, the information indicating the configuration of MBMS in the present invention can include release information of the sub-frame over allocated, the sub-frame over allocated can be released even if in circumstance of over allocation, and the resource waste can be avoided.

Description

Method for transmitting multimedia broadcast and multicast service resource configuration information

Technical field

The present invention relates to the field of wireless communications, and in particular, to a method for transmitting multimedia broadcast and multicast service resource configuration information in a hybrid carrier 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 have emerged, and various high-bandwidth multimedia services have emerged, such as video conferencing, television broadcasting, video on demand, advertising, online education, interactive games, etc. On the one hand, it meets the rising business needs of mobile users, and at the same time brings new business growth points for mobile operators. These mobile multimedia services require multiple users to receive the same data at the same time. Compared with general data, they have the characteristics of large data volume, long duration, and delay sensitivity.

In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP) proposes Multimedia Broadcast Multicast Service (MBMS), which is a data source. The technology of transmitting data to multiple targets, thereby sharing resources of the network (including the core network and the access network) and improving 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 better business prospects for the development of 3G.

The transmission of the MBMS service on the air interface is divided into a dedicated carrier and a hybrid carrier. The main difference between the two transmission modes is: the dedicated carrier mode, the carrier only carries the MBMS service; the hybrid carrier mode, the carrier not only carries the MBMS service, but also carries the non-MBMS service (non-MBMS service, such as unicast unicast service). In this way, in the process of the hybrid carrier carrying the MBMS service, there are cases where the two types of services multiplex the same carrier. How to make the two types of services do not interfere with each other and play the most important role in the transmission business process has always been a key topic in the industry discussion.

Using a hybrid carrier to carry MBMS services and non-MBMS services, two types of services The multiplexing is mainly based on FDM (Frequency-Division Multiplexing), TDM (Time-Division Multiplexing), and FDM/TDM hybrid multiplexing. At present, the industry uses TDM as the main reuse method for research. The present invention also uses TDM as a multiplexing method for hybrid carrier MBMS services and non-MBMS services.

The MBMS service and the non-MBMS service need to take into account various factors in the process of TDM multiplexing, including: impact on unicast service delay, UE (User Equipment) power saving, over-allocation, Scheduling granularity, system overhead, and scheduling flexibility. A more reasonable configuration method is to use the two-level (two-level system) configuration, as shown in Figure 1:

The two-level method uses a level 2 parameter to define the location of a specific subframe that indicates the MBMS service is carried out, as follows:

At the radio frame level (macro level), the parameter N is used to discretely allocate 2 ^N radio frames, and the value of N is implemented by using 3 bits. In addition, in order to avoid interference caused by overlapping multiple MBMS regions, Another 3bit is used to implement the offset (Offset) on the radio frame level allocation of different MBMS areas;

The sub-frame configuration (micro level) is also implemented in a 3-bit manner, and the 3-bit specific size indicates the number of consecutive sub-frames from sub-frame #1 (excluding #0).

Using this method finds a good balance between system overhead and configuration flexibility; and uses discrete mode for the allocation of radio frames, and centralized allocation for sub-frame allocation, so that delays in unicast services can be used. The UE that affects and receives the MBMS service has the advantage of complementing each other; configuring the modification period to 320ms meets the requirements of scheduling granularity. However, the biggest drawbacks of using this method at present are the problem of over-allocation and un-allocation of resources when overlapping coverage of different MBMS areas. Due to the limitation of the configuration algorithm, when the system needs to configure 129 multicast subframes in the 320ms modification period, 160 subframes are configured, and 31 subframes are over-provisioned, which causes a large amount of waste of wireless resources. . This is not allowed for wireless communication systems where wireless resources are invaluable. The resource allocation is not flexible when overlapping coverage is performed in different MBMS areas. If there are more MBMS areas covered repeatedly, the method cannot implement allocation.

Summary of the invention The technical problem to be solved by the present invention is to provide a method for transmitting multimedia broadcast and multicast service resource configuration information, which solves the problem of inflexible resource allocation and repeated allocation in some cases.

The technical solution of the present invention is a method for transmitting multimedia broadcast and multicast service resource configuration information, including: the network side and the user equipment agree to indicate a signaling structure of the MBMS resource configuration information of the multimedia broadcast and the multicast service;

The signaling structure includes a period indicating a radio frame used by the MBMS region to carry the MBMS in a modification period, indicating a number of radio frames allocated for the MBMS region in a modification period, and indicating that the MBMS region is within a modification period. The number of subframes allocated for each MBM for carrying MBMS;

When the network side sends the configured signaling structure, it is sent in an agreed manner. After receiving the signaling structure, the user equipment parses according to an agreed manner.

Further, the signaling structure further includes offset information indicating a radio frame for carrying the MBMS allocated by the MBMS area in a modification period.

Further, the number of subframes for carrying MBMS allocated for each radio frame of the MBMS region within a modification period is indicated by 3 bits;

If the modification period is M radio frames, the number of bits used for indicating the following information does not exceed log ₂ M: indicating the period of the radio frame used by the MBMS region to carry the MBMS in a modification period, indicating that the modification period is The number of radio frames allocated by the MBMS area and the offset information indicating the radio frame used by the MBMS area to carry the MBMS in a modification period.

Further, if the modification period is 32 radio frames, 3 bits are used to indicate a period of the radio frame used by the MBMS area to carry the MBMS in a modification period, and 4 bits are used to indicate the allocation of the MBMS area in a modification period. The number of radio frames, with 3 bits indicating the offset information of the radio frame used by the MBMS area to carry the MBMS in a modification period.

Further, the 3-bit indicates that the MBMS area is used for carrying in a modification period.

The period of the radio frame of the MBMS means that the decimal value corresponding to the 3-bit binary code is N, and when N 5, the number of radio frames per two adjacent radio frames is 2 ^N -1 , when N is equal to 6 Or 7 o'clock, corresponding to the case where the number of radio frames allocated in one modification period is greater than 16, at this time, every two adjacent The number of radio frames in the line frame interval is 0;

The use of 4 bits to indicate the number of radio frames allocated for the MBMS region in a modification period means that when N 5 is used, the decimal value corresponding to the 4-bit binary code plus 1 is expressed as the MBMS region in a modification period. The number of radio frames allocated within, when N is equal to 6 or 7, the decimal value corresponding to the 4-bit binary code plus 17 is used to indicate the number of radio frames allocated by the MBMS region in a modification period;

The offset information indicating that the MBMS area is used to carry the MBMS radio frame in a modification period by using 3 bits means that the MBMS area is represented by a decimal value corresponding to the 3-bit binary code in a modification period. The offset of the starting radio frame carrying the MBMS;

The number of subframes for carrying MBMS allocated for each radio frame of the MBMS region in a modification period by using 3 bits means that the radio frame corresponding to the 3-bit binary code is used to allocate each radio frame. The number of subframes used to carry MBMS.

Further, the signaling structure further includes subframe release information indicating that the MBMS region is over-allocated.

Further, the subframe release information indicating that the MBMS region is over-allocated is indicated by 3 bits; the subframe release information indicating that the MBMS region is over-allocated with 3 bits means that the decimal value corresponding to the 3-bit binary code is represented by The number of subframes that need to be released when the MBMS area is over-allocated during resource allocation.

Further, in the FDD or TDD mode, the last radio frame or the subframe used to carry the MBMS in the first radio frame is released, and the last one in the last radio frame or the first radio frame is released. The subframe used to carry the MBMS starts to be released forward until the number of subframes that need to be released is reached, or from the first radio frame or the first subframe in the first radio frame used to carry the MBMS. Release until the number of subframes that need to be released is reached.

Further, if the modification period is M radio frames, the decimal value corresponding to the binary code that does not exceed the lo _g2 M bits plus 1 indicates the number of radio frames allocated from the front to the back in the MBMS region during a modification period, or The number of radio frames not allocated to the MBMS area is calculated from the back forward in one modification period.

Further, when only one MBMS area covers the same area, if the signaling structure is not And including offset information indicating a radio frame of the MBMS area for carrying the MBMS in a modification period, where the network side and the user equipment agree to start the radio frame of the MBMS to carry the MBMS.

In summary, the present invention provides a method for transmitting multimedia broadcast and multicast service resource configuration information, which improves resource allocation flexibility and minimizes over-allocation. Furthermore, the present invention indicates MBMS configuration. The information may also include over-allocated subframe release information, so that over-allocated subframes may be released even if over-allocation occurs, thereby avoiding waste of resources. BRIEF abstract

1 is a schematic diagram of configuring a multicast subframe by using a two-level system in the prior art;

2 is a schematic diagram of the structure of the signaling structure of the method;

FIG. 3a is a schematic structural diagram of an LTE FDD frame;

FIG. 3b is a schematic structural diagram of an LTE TDD frame;

4 is a schematic diagram of overlapping coverage of three different SFN regions;

FIG. 5 is an application example of resource allocation for the overlapping coverage situation in FIG. 4;

FIG. 6 is an application example of resource allocation for the overlapping coverage situation in FIG. 4 in the FDD mode; FIG. 7 is an application example of resource allocation for the overlapping coverage situation in FIG. 4 in the TDD mode.

Preferred embodiment of the invention

The technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

The present invention provides a method for transmitting multimedia broadcast and multicast service resource configuration information, including: a signaling structure for the network side and the UE to indicate MBMS resource configuration information, the signaling structure including indicating that the MBMS region is used in a modification period. The period of the radio frame carrying the MBMS, indicating the number of radio frames allocated for the MBMS area in one modification period, and the number of sub-frames for carrying MBMS allocated for each radio frame of the MBMS area in one modification period. The signaling structure further includes offset information (offset) indicating a radio frame used by the MBMS area to carry the MBMS in a modification period, when the same area is repeatedly covered in at least the multiple MBMS areas, The signaling structure may further include the subframe release information indicating the over-allocation. When the network side sends the configured signaling structure, the network sends the configured signaling structure. When the UE receives the signaling structure, it parses according to the agreed manner. The order of the pieces of information in the signaling structure is not limited. Information indicating the MBMS resource configuration may be transmitted in the cell through a system broadcast message.

The signaling structure of the present invention indicating MBMS resource configuration information is as shown in FIG. 2:

And indicating a period of the radio frame used by the MBMS area to carry the MBMS in a modification period, indicating the number of radio frames in each of the two adjacent radio frames in the radio frame allocated for the MBMS area in a modification period;

The number of radio frames allocated for the MBMS area in a modification period, indicating the number of radio frames allocated for the MBMS area for carrying the MBMS in a modification period;

The offset information of the radio frame used to carry the MBMS in the MBMS area during a modification period is indicated, indicating the offset of the initial radio frame used by the MBMS area to carry the MBMS in a modification period, that is, the allocation of the radio frame. In the initial position, when only one MBMS area covers the same area, the part of the information may not be included. In this case, the network side and the UE may stipulate the starting position of the MBMS area for carrying the MBMS, for example, but not limited to, a modification. The first radio frame in the period is the starting radio frame.

The number of subframes for carrying MBMS allocated for each radio frame of the MBMS region during a modification period, indicating the number of subframes allocated for each radio frame in the MBMS region for carrying MBMS;

The sub-frame release information indicating the allocation is indicated, indicating the number of sub-frames that need to be released when the MBMS area is over-allocated.

The number of bits used in each part is determined according to the length of the set modification period. If the modification period is M radio frames, the number of bits used to indicate the following information does not exceed lo _g2 M: Indicates that the allocated radio frame is used within a modification period. The period of the radio frame carrying the MBMS, the number of radio frames allocated for the MBMS area within a modification period, and the offset information indicating the radio frame used by the MBMS area to carry the MBMS in a modification period. Considering the factor of granularity of MBMS service scheduling, the modification period in LTE (Long Term Evolution) is usually 320 ms, corresponding to 32 radio frames. The present invention is convenient for description, and the modification period is 32 radio frames as an example, but The modification period is other length The number of bits used in each part can still be determined by the method of the present invention.

The period in which the MBMS area is used to carry the radio frame of the MBMS in one modification period may be indicated by 3 bits. Set a parameter N, the decimal value corresponding to the 3-digit binary code is the value of N; N has 8 kinds of values, and 6 of them can be used to indicate that the period of the radio frame is 2 ^N (0 N 5). For convenience of description, it may be set that when N 5 corresponds to a case where the number of radio frames allocated in one modification period is less than or equal to 16, and at this time, discrete allocation is performed with 2 ^N radio frames as a cycle, that is, each of the allocated radio frames The number of radio frames between two adjacent radio frames is 2 ^N -1 , and when N is equal to 6 or 7, the number of radio frames allocated in a modification period is greater than 16, so every two adjacent radio frames The number of spaced radio frames is 0, that is, there is no interval. The 3bit signaling format and its representative meaning are shown in Table 1:

Table 1: The value of N and its meaning:

3bit signaling format

N=0: indicates the interval between every two adjacent radio frames in a tampering period

000

0 radio frames, and the number of allocated radio frames is less than or equal to 16

N=l: indicates the interval between every two adjacent radio frames in a modification period.

001

1 radio frame, and the number of allocated radio frames is less than or equal to 16

N=2: indicates the interval between every two adjacent radio frames in a modification period.

010

3 radio frames, and the number of allocated radio frames is less than or equal to 16

N=3: indicates the interval between every two adjacent radio frames in a modification period.

011

7 radio frames, and the number of allocated radio frames is less than or equal to 16

N=4: indicates the interval between every two adjacent radio frames in a tampering period

100

15 radio frames, and the number of allocated radio frames is less than or equal to 16

N=5: indicates the interval between every two adjacent radio frames in a modification period.

101

31 radio frames, and the number of allocated radio frames is less than or equal to 16

N=6: indicates that there is no between every two adjacent radio frames in a modification period.

110

Interval, and the number of allocated radio frames is greater than 16

N=7: indicates that there is no between every two adjacent radio frames in a modification period.

111

Interval, and the number of allocated radio frames is greater than 16 4 bits can be used to indicate the number of radio frames allocated for an MBMS area in a modification period, and a parameter Q is set. The decimal value corresponding to the 4-bit binary code is the value of Q; since the value of Q is at most 16, At most, it can only indicate that 16 radio frames are allocated in a modification period. Therefore, it is necessary to use the parameter Q and the parameter N to indicate the allocation of 32 radio frames, that is, the number of allocated radio frames is less than or equal to 16 and The case where the number of radio frames is greater than 16 is described. As shown in Table 2.1, the number of allocated radio frames is less than or equal to 16, as shown in Table 2.2, the number of allocated radio frames is greater than 16. Indicates the number of radio frames allocated for an MBMS area in a modification period, which may be a decimal value corresponding to a binary code not exceeding log ₂ M bits plus 1 to indicate the number of radio frames allocated from the front to the back in the MBMS region during a modification period. Or, indicating that the number of radio frames not allocated to the MBMS area is calculated from the back forward in a modification period.

When N 5, the value of Q and its meaning

4bit signaling format

0000 Q=0: Indicates that the number of radio frames allocated during a modification period is 1

0001 Q=l : Indicates that the number of radio frames allocated during a modification period is 2

0010 Q=2: Indicates that the number of radio frames allocated during a modification period is 3

0011 Q=3: Indicates that the number of radio frames allocated during a modification period is 4

0100 Q=4: Indicates that the number of radio frames allocated during a modification period is 5

0101 Q=5: Indicates that the number of radio frames allocated during a modification period is 6

0110 Q=6: Indicates that the number of radio frames allocated during a modification period is 7

0111 Q=7: Indicates that the number of radio frames allocated during a modification period is 8

1000 Q=8: Indicates that the number of radio frames allocated during a modification period is 9

1001 Q=9: Indicates that the number of radio frames allocated during a modification period is 10

1010 Q=10: Indicates that the number of radio frames allocated during a modification period is 11

1011 Q=ll : Indicates that the number of radio frames allocated during a modification period is 12

1100 Q=12: Indicates that the number of radio frames allocated during a modification period is 13

1101 Q=13: Indicates that the number of radio frames allocated during a modification period is 14. 1110 Q=14: Indicates that the number of radio frames allocated during a modification period is 15

1111 Q=15: Indicates that the number of radio frames allocated during a modification period is 16. As can be seen from Table 2.1, when N 5, the decimal value corresponding to the 4-bit binary code (that is, the value of Q) is increased by one. The number of radio frames allocated for an MBMS area during the modification period. The number of radio frames allocated to the MBMS can also be calculated from the back. For example, when N=001, when the number of radio frames is Q=1011, if it is calculated from the back to the front, the number of radio frames allocated to the MBMS area is 4, The maximum number of radio frames that can be allocated to the MBMS service in the period corresponding to N=001 is 16 minus the decimal number corresponding to Q.

Table 2.2: The value of Q and its meaning when N=6 or 7

1111 Q=15: Indicates that the number of radio frames allocated during a modification period is 32. As can be seen from Table 2.2, when N=6 or 7, the decimal value corresponding to the 4-bit binary code (that is, the value of Q) is increased by 17 That is, the number of radio frames allocated for one MBMS area in a modification period. The number of radio frames allocated to the MBMS can also be calculated from the back. For example, when N=110, when the number of radio frames is Q=1011, if it is calculated from the back to the front, the number of radio frames allocated to the MBMS area is 21, The maximum number of radio frames that can be allocated to the MBMS service in the period corresponding to N=001 is subtracted from the decimal number corresponding to Q.

The offset information of the radio frame for carrying the MBMS in an MBMS area in a modification period may be indicated by 3 bits, and a parameter M is set, and the decimal value corresponding to the 3-bit binary code is the value of M; the 3-bit binary code corresponds to The decimal value (that is, the value of M) is the offset of the initial radio frame used by the MBMS area to carry the MBMS in a modification period, and the starting radio frame number of the MBMS area is determined according to the numbering manner of the radio frame. If the radio frame is numbered from 0, the value of M is the starting radio frame number of the MBMS area. If the radio frame is numbered from 1, the value of M is incremented by 1 to be the starting radio frame number of the MBMS area. Shown is the case where the radio frames are numbered starting from 0.

Table 3: 3bit signaling format and its representative meaning

It can be used to indicate the allocation of each radio frame for an MBMS area within a modification period by 3 bits. The number of subframes carrying MBMS, the decimal value corresponding to the 3-bit binary code is the number of subframes allocated for each radio frame to carry MBMS, and Table 4.1 shows the number of subframe allocations in FDD mode, which is generally used for allocation. In the continuous allocation mode, the starting subframe may be, but not limited to, the first subframe that can be used to carry the MBMS, as shown in FIG. 3a, which is a schematic diagram of the FDD frame structure, where 0# (subframe 0), 4# (sub Frames 4) and 5# (subframe 5) do not carry MBMS, so 1# (subframe 1) is the starting subframe, for example, 010 indicates that 2 subframes are allocated, because the starting subframe is 1# (subframe 1) Therefore, the allocated subframes are 1# (subframe 1) and 2# (subframe 2), 100 indicates that 4 subframes are allocated, and 4 subframes are sequentially allocated from 1# (subframe 1), that is, 1 subframe. # (subframe 1), 2# (subframe 2), 3# (subframe 3), and 6# (subframe 6).

Table 4.1: 3bit signaling format and the number of sub-frame allocations represented in FDD mode

Table 4.2 shows the information about the number of subframe allocations in the TDD mode. In the allocation, the continuous allocation mode is generally used. The starting subframe can be, but is not limited to, the first subframe that can be used to carry the MBMS, as shown in Figure 3b. A schematic diagram of a TDD frame structure, where 0# (subframe 0), 1# (subframe 1), 2# (subframe 2), 5# (subframe 5), and 6# (subframe 6) do not carry MBMS, Therefore, 3# (subframe 3) is the starting subframe, and the decimal value corresponding to the binary code is the number of allocated subframes, for example, 010 indicates that 2 subframes are allocated, because the starting subframe is 3# (subframe 3), Therefore, the allocated subframes are 3# (subframe 3) and 4# (subframe 4), 100 indicates that 4 subframes are allocated, and 4 subframes are sequentially allocated from 3# (subframe 3), that is, 3# ( Subframes 3), 4# (subframe 4), 7# (subframe 7), and 8# (subframe 8). Table 4.2: 3bit signaling format and the number of sub-frame allocations represented in TDD mode

It is also possible to use 3 bits to indicate the allocated subframe release information, that is, to describe the number of subframes that need to be released when the allocation occurs during the resource allocation process in the MBMS region. The decimal value corresponding to the 3-bit binary code is the number of subframes that need to be released in the MBMS area. First, it is necessary to stipulate which radio frame is used to carry the MBMS subframe, but it is not limited to releasing the first wireless. The subframe used to carry the MBMS in the frame or the subframe used to carry the MBMS in the last radio frame may also be the subframe used to carry the MBMS in a certain radio frame in the middle, and may be the last one when released. The last frame in the radio frame or the first radio frame used to carry the MBMS starts to be released forward until the number of subframes that need to be released is reached, or may be from the last radio frame or the first radio frame. A subframe for carrying MBMS starts to be released backward until the number of subframes that need to be released is reached.

Assume that Tables 5.1 and 5.2 stipulate that the subframes used to carry MBMS in the last radio frame are released. The decimal number corresponding to the binary code indicates the number of over-allocated subframes that need to be released. If 000 indicates no over-allocation, no release is required. , 001 indicates that the last subframe used to carry the MBMS is released;

Table 5.1: 3bit signaling format and meaning in FDD mode (agreement to release the subframes used to carry MBMS in the last radio frame) Subframe information released by the 3bit signaling format

000 has not been assigned

001 Releases the last subframe of the last radio frame used to carry MBMS

010 Release the last 2 subframes of the last radio frame used to carry MBMS

Oi l releases the last three subframes of the last radio frame used to carry MBMS

100 Release the last 4 subframes used to carry MBMS for the last radio frame

101 Release the last 5 subframes used to carry MBMS for the last radio frame

110 Release the last 6 subframes used to carry MBMS for the last radio frame

111 reserved

Table 5.2: 3bit signaling format and meaning in TDD mode (agreement to release the subframe used to carry MBMS in the last radio frame)

The present invention will be further described below by way of an application example. The following SFN (single frequency network) area is MBMS area:

Application example 1 :

As shown in Fig. 4, it is a typical case where multiple SFN areas overlap, and the area marked as area A in the figure is repeatedly covered by three different SFN areas. Now you need to allocate resources to each SFN area. It is assumed that the MBMS of the SFN1, SFN2, and SFN3 areas require 36, 18, and 16 subframes per modification period.

According to the present invention, a configuration scheme as shown in FIG. 5 can be provided, wherein each small square represents a radio frame, and the radio frame marked with a number represents a radio frame allocated to the SFN area, and the marked number indicates the radio frame. The number of subframes allocated to carry MBMS.

The above scheme is described in the form of signaling as follows, and both FDD and TDD modes are satisfied:

Since the number of radio frames required by the SFN1, SFN2, and SFN3 areas is less than 16, the parameter N < 5, that is, the value of N is in the range of {000, 001, 010, 011, 100, 101}, corresponding to the value of Q. The number of allocated radio frames is as shown in Table 2.1. It is assumed that the configuration order of each part of the information in the signaling structure is a period indicating the radio frame used to carry the MBMS in one modification period, indicating that the MBMS is within one modification period. The number of radio frames allocated by the area, the offset information indicating the radio frame used by the MBMS area to carry the MBMS in a modification period, and the subframe for carrying the MBMS allocated for each radio frame of the MBMS area in one modification period. For the quantity, the signaling structure corresponding to SFN1 in application example 1 is 0011011111011, the signaling structure corresponding to SFN2 is 0100101010011, and the signaling structure corresponding to SFN3 is 0100011100100.

Application example 2:

Still taking Figure 4 as an example, Area A is still repeatedly covered by 3 different SFN areas, assuming The MBMS of the SFN1, SFN2, and SFN3 areas respectively require the number of subframes to be 133, 15, and 4 in each modification period.

According to the present invention, the configuration schemes shown in FIG. 6 and FIG. 7 can be respectively provided for FDD and TDD, wherein each small square represents a radio frame, and the radio frame marked with a number represents a radio frame allocated to the SFN area. The number marked indicates the number of subframes allocated in this radio frame for carrying MBMS.

In FDD mode, the above scheme is described in signaling form as follows:

For the SFN1 area, the number of allocated radio frames is 19, which is greater than 16. Therefore, the value of the parameter N is 6 or 7, which is 110 or 111. The value of the corresponding Q indicates the number of allocated radio frames. As shown, Q has a value of 2 and a corresponding binary code of 0010.

For SFN2 and SFN3, the number of required radio frames is 3 and 2, respectively, which are less than 16, so the value of parameter N is in the range of {000, 001, 010, 011, 100, 101 }, corresponding to Q. The number of allocated radio frames represented by the values is shown in Table 2.1.

In the TDD mode, the above scheme is described in signaling form as follows:

For the SFN1 area, the number of allocated radio frames is 27, which is greater than 16, therefore, the parameter N The value of the value is 6 or 7, which is 110 or 111. The value of the corresponding radio indicates the number of allocated radio frames as shown in Table 2.2. Therefore, the value of Q is 10, and the corresponding binary code is 1010. In this way, a total of 135 subframes are allocated for the SFN1 area, and the over-allocation is added. Therefore, the signaling for releasing the allocated subframes needs to be added. Here, two over-allocated subframes appear in SFN1, so the over-allocation subframe release signaling is 010, indicating Release the last two subframes of the last radio frame.

For SFN2 and SFN3, the number of radio frames required is 3 and 1, respectively, which are less than 16, so the value of parameter N is in the range of {000, 001, 010, 011, 100, 101}, corresponding to Q. The number of allocated radio frames represented by the values is shown in Table 2.1. Since the SFN2 and the SFN3 do not have an allocation, the information indicating the release of the allocated subframe may not be configured. After the UE receives the information indicating the configuration of the MBMS resource, the UE may obtain the accurate information of the signaling structure in other manners, for example, An indication bit for indicating whether there is over-allocated subframe release information is added to the message sent by the network side to the UE. After receiving the message, the UE identifies, by using the indication bit, whether the signaling structure configured at this time exists. The allocated subframe release information, the UE may also learn by blind detection, that is, first parsing once the information of the over-allocated subframe is released, and if there is an error, parsing the sub-frame release information without over-allocation.

The above two application examples can be used: The prior art cannot perform resource configuration or must be partially solved by over-allocation, and the present invention can complete the above configuration without over-allocation, thereby improving resource allocation flexibility. Sexuality, and to the greatest extent avoid over-allocation. In application example 2, the SFN1 area uses the parameter N and the parameter Q to jointly define the number of allocated radio frames, and the system overhead is minimized on the basis of improving resource allocation flexibility. Further, the present invention indicates that the information of the MBMS configuration may further include the over-allocated subframe release information, so that even if the over-allocation occurs, the over-allocated subframe can be released, thereby avoiding waste of resources.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention. Industrial applicability

The technical solution of the present invention improves the flexibility of resource allocation, and the over-allocation is avoided to the utmost extent. Furthermore, the information indicating that the MBMS configuration may further include the over-allocated subframe release information, therefore, Even if an allocation occurs, the over-allocated subframe can be released, avoiding waste of resources.

Claims

Claim

A method for transmitting multimedia broadcast and multicast service resource configuration information, comprising: a signaling structure in which a network side and a user equipment agree to indicate MBMS resource configuration information of a multimedia broadcast and a multicast service;

2. The method of claim 1 wherein:

The signaling structure further includes offset information indicating a radio frame for carrying the MBMS allocated by the MBMS region within a modification period.

3. The method of claim 1 or 2, characterized by:

3 bits are used to indicate the number of subframes allocated for each radio frame of the MBMS region for carrying MBMS within a modification period;

4. The method of claim 3 wherein:

If the modification period is 32 radio frames, 3 bits are used to indicate the period of the radio frame used by the MBMS area to carry the MBMS in a modification period, and 4 bits are used to indicate the number of radio frames allocated for the MBMS area in one modification period. The offset information of the radio frame for carrying the MBMS in the MBMS area is indicated by 3 bits in a modification period.

5. The method of claim 4 wherein: The period of the radio frame for carrying the MBMS in the MBMS area for indicating the MBMS area in one modification period is that the decimal value corresponding to the 3-bit binary code is N, and when N 5, every two adjacent radio frames The number of inter-spaced radio frames is 2 ^Ν -1 . When N is equal to 6 or 7, the number of radio frames allocated in one modification period is greater than 16. The number of radio frames per two adjacent radio frames is 0;

6. The method of claim 1 or 2, characterized by:

The signaling structure further includes subframe release information indicating that the MBMS region is over-allocated.

7. The method of claim 6 wherein:

Sub-frame release information indicating that the MBMS area is over-allocated with 3 bits;

The sub-frame release information indicating that the MBMS area is over-allocated with 3 bits means that the sub-frame to be released when the MBMS area is over-allocated during the resource allocation process is represented by a decimal value corresponding to the 3-bit binary code. Quantity.

8. The method of claim 7 wherein:

In the FDD or TDD mode, the last radio frame or the subframe used to carry the MBMS in the first radio frame is released, and the last one from the last radio frame or the first radio frame is used for carrying The MBMS subframe starts to be released forward until the number of subframes that need to be released is reached, or The latter is released from the last radio frame or the first subframe in the first radio frame for carrying the MBMS until the number of subframes that need to be released is reached.

9. The method of claim 3, further comprising:

If the modification period is M radio frames, the decimal value corresponding to the binary code not exceeding the log ₂ M bits plus 1 indicates the number of radio frames allocated from the front to the back in the MBMS region during a modification period, or indicates a modification. The number of radio frames not allocated to the MBMS area is calculated from the back forward in the period.

10. The method of claim 1 wherein:

When only one MBMS area covers the same area, if the signaling structure does not include offset information indicating that the MBMS area is used to carry the MBMS radio frame in a modification period, the network side and the user equipment agree that the MBMS area is used for The starting position of the radio frame carrying the MBMS.