CN101959135B - Resource indication method and enhanced base station - Google Patents

Abstract

The present invention provides a resource indication method and an enhanced base station. The method is used in the multi-cell transmission mode of the multimedia broadcast multicast system MBMS, including: obtaining the first number of subframes actually required by the MBMS service; determining an MSAP instruction; MSAP The instruction is used to indicate a second number of initial subframes, and the second number is the minimum value greater than or equal to the first number among the number of subframes that can be indicated by the MSAP indication method; when the first number is less than the second number, from Selecting a third number of over-allocated subframes in the initial subframe, and generating a correction instruction indicating the position of the over-allocation subframe, the third number being the difference between the second number and the first number; sending the MSAP instruction and the correction instruction to the receiving end , indicating the receiving end that the subframe finally used to transmit the MBMS data in the scheduling period is a subframe in the initial subframe except the over-allocated subframe. The invention can reduce the energy consumption of the terminal; at the same time, it can improve the resource utilization rate.

Description

A resource indication method and enhanced base station

technical field

The present invention relates to MBMS (Multimedia Broadcast/Multicast System, multimedia broadcast multicast system), in particular to a resource indication method and an enhanced base station.

Background technique

In the LTE (Long Time Evolution, long-term evolution) system, MBMS is called Enhanced MBMS (EMBMS). In EMBMS, two transmission modes are defined: multi-cell (Multi-cell) transmission mode and single-cell (Single-cell) transmission mode. )transfer method.

Multi-cell transmission supports the combination of information of multiple cells, and can be transmitted synchronously. This method is called MBSFN (Multicast/Broadcast Single Frequency Network, Multicast Broadcast Single Frequency Network). In the broadcasting system, the SFN method is widely used, which sends the same signal on the same frequency resource and at the same time through multiple different transmitters. Through this transmission mode, information among multiple cells can be combined, thereby increasing the spectrum utilization rate of broadcasting. The channel structure of MBSFN is shown in FIG. 1 , which shows logical channels, transport channels and physical channels of MBSFN. The description is as follows in conjunction with FIG. 1 .

Assuming that one MBMS service (for example, the program of BTV-1 station) corresponds to one logical channel, one or more logical channels MTCH can be mapped to the same transport channel MCH, that is, multiple MBMS services will be assigned one Bundle Bit Rate, these services share this bundle of resources. The benefit of doing this is mainly for multiplexing gain.

The resources occupied by an MCH are represented by MSAP (MCH Subframe Allocation Pattern, transmission channel subframe allocation pattern).

An example in conjunction with Figure 1 is as follows, if MSAP={#1RF(#2and#8sub frame), #12RF(#2, #3and#7sub frame), #22RF(#3and#9sub frame)}, it means that in a scheduling cycle In the (SP), the first radio frame RF, the 12th radio frame and the 22nd radio frame all include MCH resources. As far as subframes are concerned, the 2nd and 8th subframes of the 1st radio frame are used to transmit MBMS data; the 2nd, 3rd and 7th subframes of the 12th radio frame are used for To transmit MBMS data.

According to the definition of 3GPP, the system needs to broadcast the MSAP once in each scheduling cycle. A scheduling period (320ms) includes 32 Radio Frames, and each Radio Frame includes 10 subframes, among which #0, #4, #5 and #9 subframes cannot be used to transmit MBMS data. That is to say, each scheduling cycle includes 32*6=192bit subframes (subframes) that may be used to transmit MBMS data.

To make precise indication, the easiest way is to use the form of bitmap, if it is a subframe used to transmit MBMS data, use 1 to indicate, otherwise, use 0 to indicate. In this way, the required signaling overhead is 192/320ms=600bps.

Obviously, the above-mentioned signaling overhead is relatively large. In order to reduce the signaling overhead for indication, in Release8 of 3GPP, the indication method of MSAP is defined as follows:

Among them, MBSFN-SubframeConfiguration means all subframes allocated to MBSFN, that is, MSAP.

This information is included in SIB2 (System Information Type 2, type 2 system information) of the system information, and is transmitted by the broadcast channel BCCH.

The following example illustrates the setting of MBSFN-SubframeConfiguration.

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{101100}}

The above settings indicate that in a scheduling cycle, there are 4 equally spaced Radio Frames containing subframes for transmitting MBMS data, and at the same time, the first Radio Frame in the scheduling cycle contains subframes for transmitting MBMS data. In each MBSFN RF there are 3 subframes for transmitting MBMS data, and the specific subframes are determined according to the bitmap.

According to the above MBSFN-SubframeConfiguration settings, the corresponding MSAP diagram is shown in Figure 2: the squares filled with single slashes represent radio frames containing subframes used to transmit MBMS data, and the squares filled with diamonds represent radio frames In the subframe used to transmit MBMS data, the subframe represented by the grid filled with the rectangle has been defined for other purposes and cannot be used to transmit MBMS data.

The following uses another example to illustrate the setting of MBSFN-SubframeConfiguration.

radioframeAllocationPeriod=n32

radioframeAllocationOffset=0

subframeAllocation=CHIOCE{fourFrames{1110011...}}

The above settings indicate that in one scheduling period, 32 Radio Frames include MBSFN subframes. And the first Radio Frame in the scheduling period includes subframes for transmitting MBMS data, and there are 17 subframes for transmitting MBMS data in every 4 radio frames.

FIG. 3 shows the positions of the 17 subframes for transmitting MBMS data in the 4 radio frames.

It can be seen from the above examples that the MSAP indication method defined in 3GPP greatly reduces signaling overhead.

However, the inventor found in the process of implementing the embodiments of the present invention that the prior art has at least the following disadvantages:

The MSAP indication method defined in 3GPP will lead to the problem of waste of resources, and an example is illustrated as follows.

Assume that according to service characteristics, 137 subframes need to be allocated to the MCH to transmit MBMS data. However, due to the limitation of SIB2, only 136 or 144 subframes can be indicated. According to the upper boundary principle, only 144 subframes can be selected and indicated, but after selecting the indicated 144, it is obvious that 7 more subframes are indicated, and the 7 more indicated subframes cannot be used to transmit useful data, which obviously causes waste of resources.

Contents of the invention

The object of the present invention is to provide a resource indication method and an enhanced base station, so as to realize precise indication of resources and improve resource utilization.

In order to achieve the above object, an embodiment of the present invention provides a resource indication method for a multi-cell transmission mode of a multimedia broadcast multicast system MBMS, which includes:

Obtaining a first number according to service characteristics of the MBMS service, where the first number is the number of subframes actually required by the MBMS service within a scheduling period;

Determine an MSAP instruction according to the first number; the MSAP instruction is used to indicate a second number of initial subframes used to transmit MBMS data, and the second number is greater than the number of subframes that can be indicated by the MSAP indication method or the minimum value equal to said first number;

When the first number is less than the second number, select a third number of over-allocated subframes from the initial subframes, and generate a correction instruction indicating the position of the over-allocated subframe according to the selection result, the the third number is the difference between the second number and the first number;

Sending the MSAP instruction and the correction instruction to the receiving end, instructing the receiving end that the subframe finally used for transmitting MBMS data in the scheduling period is a subframe in the initial subframe except the over-allocated subframe.

In the resource indication method above, the correction instruction is sent to the receiving end through a broadcast channel or an MBMS point-to-multipoint control channel MCCH.

The resource indication method above, wherein the selecting a third number of over-allocated subframes from the initial subframes, and generating a correction instruction indicating the position of the over-allocated subframes according to the selection result specifically includes:

arbitrarily selecting a third number of over-allocated subframes from said initial subframes;

determining the position of the selected over-allocated subframe;

A first correction instruction is generated, where the first correction instruction includes the sequence number of the radio frame where each of the over-allocated subframes is located, and the sequence number of each of the over-allocation subframes in the radio frame.

The resource indication method above, wherein the selecting a third number of over-allocated subframes from the initial subframes, and generating a correction instruction indicating the position of the over-allocated subframes according to the selection result specifically includes:

selecting a third number of over-allocated subframes from the initial subframes, in which the over-allocated subframes are continuously distributed;

generating a fourth amended instruction comprising said third number, first sequence number and second sequence number;

The first sequence number is the sequence number of the radio frame where the first over-allocated subframe is located;

The second sequence number is the sequence number of the first over-allocated subframe in the radio frame.

The resource indication method above, wherein the selecting a third number of over-allocated subframes from the initial subframes, and generating a correction instruction indicating the position of the over-allocated subframes according to the selection result specifically includes:

Select a third number of subframes from the initial subframes as over-allocated subframes, and the over-allocated subframes are distributed in the last fourth number of radio frames in the radio frames indicated by the MSAP instruction, and each of the over-allocation subframes In the fourth number of radio frames, the last fifth number of subframes belonging to the initial subframe are over-allocated subframes; the product of the fourth number and the fifth number is the third number;

A fifth amended instruction including the fourth number and the fifth number is generated.

The resource indication method above, wherein the selecting a third number of over-allocated subframes from the initial subframes, and generating a correction instruction indicating the position of the over-allocated subframes according to the selection result specifically includes:

From the initial subframes, sequentially select a third number of subframes as over-allocated subframes in a sequence from back to front or from front to back;

A sixth amended instruction including the third number is generated.

In order to achieve the above object, an embodiment of the present invention also provides an enhanced base station for the multi-cell transmission mode of the multimedia broadcast multicast system MBMS, including:

The first number determination module is configured to obtain a first number according to service characteristics of the MBMS service, the first number being the number of subframes actually required by the MBMS service within a scheduling period;

A first instruction generation module, configured to determine an MSAP instruction according to the first number; the MSAP instruction is used to indicate a second number of initial subframes used to transmit MBMS data, and the second number is specified by the MSAP indication method A minimum value greater than the first number among the indicated number of subframes;

A second instruction generation module, configured to select a third number of over-allocated subframes from the initial subframes when the first number is less than the second number, and generate instructions indicating the over-allocation subframes according to the selection result Instructions for modifying frame positions, the third number is the difference between the second number and the first number;

A sending module, configured to send the MSAP instruction and the correction instruction to the receiving end, instructing the receiving end that the subframes finally used to transmit MBMS data in the scheduling period are the subframes except the over-allocated subframes in the initial subframes subframes other than

A service processing module, configured to use subframes in the initial subframes other than the over-allocated subframes to process the MBMS service.

In the above-mentioned enhanced base station, the correction instruction is sent to the receiving end through a broadcast channel or an MBMS point-to-multipoint control channel MCCH.

In the above-mentioned enhanced base station, the second instruction generation module specifically includes:

means for arbitrarily selecting a third number of over-allocated subframes from said initial subframes;

means for determining the position of the selected over-allocated subframe;

A unit for generating a first correction instruction, where the first correction instruction includes the sequence number of the radio frame where each of the over-allocated subframes is located, and the sequence number of each of the over-allocation subframes in the radio frame.

In the above-mentioned enhanced base station, the second instruction generation module specifically includes:

A unit for selecting a third number of over-allocated subframes from the initial subframe, in which the over-allocated subframes are continuously distributed;

means for generating a fourth revision instruction comprising said third number, first sequence number and second sequence number;

The first sequence number is the sequence number of the radio frame where the first over-allocated subframe is located;

The second sequence number is the sequence number of the first over-allocated subframe in the radio frame.

In the above-mentioned enhanced base station, the second instruction generation module specifically includes:

A unit for selecting a third number of subframes from the initial subframes as over-allocated subframes, the over-allocated subframes being distributed in the last fourth number of radio frames in the radio frames indicated by the MSAP instruction , in each of the fourth number of radio frames, the last fifth number of subframes belonging to the initial subframe is an over-allocated subframe; the product of the fourth number and the fifth number is a third number;

Means for generating a fifth revision instruction comprising said fourth number and fifth number.

In the above-mentioned enhanced base station, the second instruction generation module specifically includes:

A unit for selecting a third number of subframes from the initial subframes in sequence from back to front or from front to back as an over-allocated subframe;

Means for generating a sixth revision instruction comprising said third number.

Embodiments of the present invention have the following beneficial effects:

In the specific embodiment of the present invention, by issuing a correction instruction on the basis of the existing technology, the correction instruction is used to indicate the position information of the over-allocated subframe, and after receiving the correction instruction, the receiving end can determine the MSAP indication for transmitting MBMS The over-indicated subframe in the initial subframe of the data, therefore, the terminal will not receive data on the over-allocated subframe, which will inevitably reduce the energy consumption of the terminal; at the same time, since the terminal will not receive data from the over-allocated subframe , so the over-allocated subframe can be used for transmission of unicast service data, which can improve resource utilization.

Description of drawings

FIG. 1 is a schematic diagram of logical channels, transport channels and physical channels of MBSFN;

FIG. 2 is a schematic diagram of a subframe indicated by an MSAP;

Fig. 3 is a schematic diagram of the positions of 17 subframes used to transmit MBMS data in 4 radio frames;

FIG. 4 is a schematic diagram of a resource indication method according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of a base station according to an embodiment of the present invention.

Detailed ways

The resource indication method and the enhanced base station in the embodiment of the present invention are used in the multi-cell transmission mode in MBMS, which indicates the subframes in the Radio Frame that are not used to transmit MBMS data by issuing the resource indication field, so as to realize accurate indication and improve resource utilization. utilization rate.

According to the definition in 3GPP R8, the numbers of all subframes indicated for transmitting MBMS data are as follows.

As shown in the above table, when the subframeAllocation field is 1 wireless frame. According to the definition, each scheduling period SP (320ms) can contain 1, 2, 4, 8 radio frames RF for transmitting MBMS data, and each Radio Frame can contain 1-6 RF frames for transmitting MBMS data subframe. Therefore, the number of all supported subframes for transmitting MBMS data only needs to be simply multiplied.

And when the subframeAllocation field is 4 wireless frames. By definition, each scheduling period SP (320ms) may contain 16 or 32 radio frames RF for transmitting MBMS data, and each 4 Radio Frames may contain 1-24 subframes for transmitting MBMS data. Therefore, the number of all supported subframes for transmitting MBMS data only needs to be simply multiplied.

According to the above description, it can be found that the number of subframes used to transmit MBMS data indicated by the MSAP indication method defined in 3GPP is discontinuous, as follows:

1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40, ..., 192.

Due to its discontinuity, once the number of subframes used to transmit MBMS data actually required by the service is not in the above-mentioned set, according to the upper boundary principle, only a subframe larger than the actual number but the closest to the actual number can be selected from the set. close to the number, and send the subframe indication corresponding to the determined number to the user equipment, resulting in an over-allocation problem.

It can be seen from the above collection that the difference between adjacent elements is less than or equal to 8, that is, according to the MSAP indication method defined in 3GPP, the number of over-allocated subframes is less than or equal to 7.

The resource indication method of the embodiment of the present invention is shown in Figure 4, including:

Step 41, obtaining a first number according to the service characteristics of the MBMS service to be transmitted, the first number being the number of subframes actually required by the MBMS service within a scheduling period;

Step 42, generate an MSAP instruction according to the MSAP indication method defined by the first number and 3GPP, and the MSAP instruction is used to indicate the number of initial subframes (the second number ) and the position of the initial subframe; the second number is the minimum value greater than or equal to the first number among the number of subframes that can be indicated by the MSAP indication method;

Step 43, when the first number is not equal to the second number, select a third number of over-allocated subframes from the initial subframes, and generate an over-allocated subframe indicating the position of the over-allocated subframe according to the selection result modifying the instruction, the third number is the difference between the second number and the first number;

Step 44, sending the MSAP instruction and the correction instruction to the user terminal, instructing the user terminal that the subframes finally used to transmit MBMS data in the scheduling period are the initial subframes except the over-allocated subframes subframe.

Finally, the base station processes the MBMS service to be transmitted by using the subframe finally used for transmitting MBMS data.

The enhanced base station of the embodiment of the present invention is shown in Figure 5, including:

The first number acquisition module is configured to acquire the first number according to the service characteristics of the MBMS service to be transmitted, and the first number is the number of subframes actually required by the MBMS service within a scheduling period;

The MSAP instruction generation module is used to determine an MSAP instruction according to the first number and the MSAP indication method defined by 3GPP, and the MSAP instruction is used to indicate the number of initial subframes used to transmit MBMS data preliminarily determined in a scheduling cycle (the second number) and the position of the initial subframe; the second number is the minimum value greater than or equal to the first number among the number of subframes that can be indicated by the MSAP indication method;

A correction module, configured to select a third number of over-allocated subframes from the initial subframes when the first number is not equal to the second number, and generate a position indicating the over-allocated subframe according to the selection result Instructions for modifying information, the third number is the difference between the second number and the first number;

A sending module, sending the MSAP instruction and the correction instruction to the user terminal, instructing the user terminal that the subframe finally used to transmit MBMS data in the scheduling period is a subframe in the initial subframe except the over-allocated subframe frame;

The service processing module processes the MBMS service to be transmitted by using the subframe finally used for transmitting MBMS data.

How to implement the correction module will be described in detail below.

<Implementation method one>

In the first implementation, the correction module arbitrarily specifies the third number of over-allocated subframes, which specifically includes:

a first selection unit, arbitrarily selecting a third number of over-allocated subframes from the initial subframes;

a position determination unit, configured to determine the position of the selected over-allocated subframe;

The first instruction generation unit is configured to generate a first modification instruction; the first modification instruction includes the sequence number of the radio frame where each over-allocated subframe is located, and the sequence number of each over-allocation subframe in the radio frame.

Considering that there are only 7 subframes at most, the position of the subframe includes the following two aspects of information:

The serial number of the radio frame where the subframe is located, indicating the position of the radio frame where it is located;

The sequence number of the subframe itself, indicating its position in the radio frame;

According to existing regulations, a scheduling period includes 32 radio frames, and each radio frame includes 10 subframes, so if you want to accurately indicate a subframe, you need:

5Bits indicates the serial number of the wireless frame where the subframe is located (the serial number of the first wireless frame is 0);

4Bits indicates the serial number of the subframe in the radio frame;

So a subframe needs 9bits to specify the position;

Therefore, in the first way, a maximum of 63 bits may be needed to indicate the position of any specified third number of over-allocated subframes.

Examples are as follows:

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, it is assumed that the selected over-allocated subframe is:

The second subframe in the first radio frame;

The third subframe in the fifth radio frame;

The fourth subframe in the 29th radio frame;

According to method 1, the first modification instruction can be in the following format:

00000 0010 00100 0011 11100 0100

The receiving end can first select 5 bits to determine the serial number of the wireless frame where the first over-allocated subframe is located, and then select 4 bits to determine the serial number of the first over-allocated subframe in the wireless frame, and so on, to determine All over-allocated subframes.

Of course, as for how to arrange the above information, it only needs to be negotiated by both parties, and it can also be in the following order:

00000 00100 11100 0010 0011 0100.

The receiving end determines the serial numbers of the radio frames where the first, second and third over-allocated subframes are located according to the first 15 bits, and then determines the location of the first, second and third over-allocated subframes according to the last 12 bits. The sequence number in the radio frame can determine the over-allocated subframe according to the above two pieces of information.

<Implementation method 2>

In the first implementation, a maximum of 63 bits may be required to indicate the position information of the over-allocated subframe. In order to reduce the length of the correction instruction, a second implementation of the correction module is proposed.

In the second implementation, the correction module specifically includes:

The second selection unit selects a third number of subframes from the initial subframes as over-allocated subframes, and all the over-allocated subframes have the same sequence number in the radio frame (indicating that there can only be one over-allocated subframe in a radio frame. allocate subframe);

The second instruction generation unit is configured to generate a second modification instruction, where the second modification instruction includes a sequence number in a radio frame and a sequence number of a radio frame where each of the over-allocated subframes is located.

Therefore, in the second implementation mode, the following number of bits may be required at most to indicate the position of the over-allocated subframe:

The serial number of the over-allocated subframe in the radio frame, since a radio frame includes 10 subframes, and all the over-allocated subframes have the same serial number, so this part only needs 4 bits;

The sequence number of the radio frame in which the over-allocated subframe is located. Since one scheduling period includes 32 radio frames, the sequence number of the radio frame in which each over-allocated subframe is located requires 5 bits.

Therefore, the bits that may be required at most are 4+5*7=39.

Compared with the first method that may require up to 63 bits, the length of the correction instruction is reduced.

Examples are as follows:

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, it is assumed that the selected over-allocated subframe is:

The second subframe in the first radio frame;

The second subframe in the fifth radio frame;

The second subframe in the 29th radio frame.

According to the second method, the second modification instruction can be in the following format:

0010 00000 00100 11100

The receiver first selects 4 bits to determine that the serial number of the over-allocated subframe in the radio frame is 2, then selects 5 bits to determine the serial number of the wireless frame where the first over-allocated subframe is located is 1, and then selects 5 bits to determine the serial number of the wireless frame where the first over-allocated subframe is located. The serial number of the radio frame where the two over-allocated subframes are located is 5, and the last 5 bits determine that the serial number of the radio frame where the third over-allocated subframe is located is 29, and all over-allocated subframes have been determined so far.

Of course, the following order of arrangement is also possible:

00000 00100 11100 0010.

<Implementation method three>

In the second implementation, a maximum of 39 bits may be required to indicate the location information of the over-allocated subframe. In order to further reduce the length of the correction command, a third implementation of the correction module is proposed.

In the third implementation, the correction module specifically includes:

The third selection unit selects a third number of subframes from the initial subframes as over-allocated subframes, and the over-allocated subframes are the last of the initial subframes of the radio frame in which they are located;

The third instruction generation unit is configured to generate a third modification instruction, where the third modification instruction includes the serial number of the radio frame where each of the over-allocated subframes is located.

An example is given below, assuming:

In MSAP, subframeAllocation=CHIOCE{oneFrame{111111}}, then each over-allocated subframe is the ninth subframe of the radio frame;

In MSAP, subframeAllocation=CHIOCE{oneFrame{111100}}, then each over-allocated subframe is the seventh subframe of the radio frame;

In MSAP, subframeAllocation=CHI0CE{oneFrame{111101}}, then each over-allocated subframe is the ninth subframe of the radio frame.

In the case where both communication parties understand the meaning of the correction command, since they both specify the last subframe that can be used to transmit MBMS data as an over-allocated subframe, the serial number of the over-allocated subframe does not need to be notified to the other end. For the implementation method 2, 4 bits are reduced, and a maximum of 35 bits may be required to indicate the position information of the over-allocated subframe.

Of course, it is also possible to select the first one of the subframes used to transmit MBMS data in the radio frame as the over-allocated subframe.

Examples are as follows:

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, and since the 2nd, 3rd, 4th, 7th, 8th, and 9th in the wireless frame are used to transmit MBMS data, according to the implementation method 3, the selected over-allocated subframes are:

The ninth subframe of the first radio frame;

The ninth subframe of the fifth radio frame;

The ninth subframe of the 29th radio frame;

According to the third method, the third revised instruction is as follows:

00000 00100 11100

The receiving end takes 5 bits to determine that the serial number of the wireless frame where the first over-allocated subframe is located is 1, and then takes 5 bits to determine that the serial number of the wireless frame where the second over-allocated subframe is located is 5, and the last 5 bits It is determined that the sequence number of the radio frame where the third over-allocated subframe is located is 29, and after determining the radio frame, it is determined that the last subframe in these radio frames is an over-allocation subframe.

<Implementation method 4>

In order to further reduce the length of the correction instruction, in the implementation mode 4, the correction module specifically includes:

The fourth selection unit selects a third number of over-allocated subframes from the initial subframes, and in the initial subframes, the over-allocated subframes are continuously distributed;

A fourth instruction generation unit, configured to generate a fourth correction instruction, the fourth correction instruction including the third number, the sequence number of the wireless frame where the first or last over-allocated subframe is located, and its own sequence number .

Considering that the number of initially determined initial subframes used to transmit MBMS data and the position of the initial subframes can be known according to the MSAP, and the over-allocated subframes are continuously distributed, if the first subframe or the last subframe is known The sequence number of the wireless frame and its own sequence number, the receiving end can determine the specific positions of all over-allocated subframes through simple calculations.

In the fourth implementation, it may need at most 3 (the third number) + 5 (indicating the sequence number of the radio frame where the first or last over-allocated subframe is located) + 4 (the first or last The sequence number of the over-allocated subframe itself)=12bits indicates the position of the over-allocated subframe.

The sequence number of the radio frame where the first subframe in the over-allocated subframe is located and the sequence number of the first subframe itself in the over-allocated subframe are illustrated as follows:

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, according to the implementation method 4, it is assumed that the selected over-allocated subframe is:

The ninth subframe in the first radio frame;

The second subframe in the fifth radio frame;

The third subframe in the fifth radio frame;

According to the fourth method, the fourth revised instruction is as follows:

011 00000 1001

The receiving end takes 3 bits to determine that the number of over-allocated subframes is 3, and then determines that the first over-allocated subframe is located in the first radio frame according to the next 00000, and the sequence number in the radio frame is 9 (1001) , after the first over-allocation subframe is determined, since the number of over-allocation subframes is known and the over-allocation subframes are continuously distributed, all over-allocation subframes can be determined.

<Implementation method five>

In order to further reduce the length of the correction instruction, in the fifth implementation, the correction module specifically includes:

The fifth selection unit selects a third number of subframes from the initial subframes as over-allocated subframes, and the radio frame with over-allocated subframes is the last radio frame for transmitting MBMS data indicated by the MSAP. Four numbers of radio frames (over-allocated subframes are distributed in the last fourth number of radio frames in the radio frames indicated by the MSAP instruction), the last of the subframes used to transmit MBMS data in the first radio frame The fifth number of subframes is an over-allocation subframe (in each of the fourth number of radio frames, the last fifth number of subframes belonging to the initial subframe is an over-allocation subframe); the fourth number and The product of the fifth number is the third number;

A fifth instruction generating unit, configured to generate a fifth modified instruction, where the fifth modified instruction includes the fourth number and the fifth number.

In the fifth implementation manner, at most 3 (indicating the fourth number)+3 (indicating the fifth number)=6 bits may be required to indicate the position of the over-allocated subframe.

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, according to the fifth implementation, the selected over-allocated subframes are:

The 9th subframe in the 21st radio frame;

The 9th subframe in the 25th radio frame;

The 9th subframe in the 29th radio frame;

According to the fifth method, the fifth revised instruction is as follows:

011 001

The receiving end takes 011 to determine that there are over-allocated subframes distributed in the last three wireless frames indicated by the MSAP for transmitting MBMS data, and the receiving end takes 001 to determine that in each wireless frame with over-allocated subframes distributed, for The last of the subframes for transmitting MBMS data is an over-allocation subframe, so far, all over-allocation subframes can be determined.

Assume that the number of subframes actually required by the current service is 42, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 6 over-allocated subframes, according to the fifth implementation, the selected over-allocated subframes are:

The 8th and 9th subframes in the 21st radio frame;

The 8th and 9th subframes in the 25th radio frame;

The 8th and 9th subframes in the 29th radio frame;

According to the fifth method, the fifth revised instruction is as follows:

011 010

The receiving end takes 011 to determine that there are over-allocated subframes distributed in the last three wireless frames indicated by the MSAP for transmitting MBMS data, and the receiving end takes 010 to determine that in each wireless frame with over-allocated subframes distributed, for The last two of the subframes for transmitting MBMS data are over-allocated subframes, so far, all over-allocated subframes can be determined.

<Implementation method six>

In order to further reduce the length of the correction instruction, in the sixth implementation, the correction module specifically includes:

The sixth selection module, from the initial subframes, sequentially select the third number of subframes as the over-allocated subframes according to the order from back to front or from front to back;

A sixth instruction generation unit, configured to generate a sixth modification instruction, where the sixth modification instruction includes the third number.

Considering that the number of initially determined initial subframes used to transmit MBMS data and the position of the initial subframes can be known according to the MSAP, and the over-allocated subframe is the last or the first subframe, the receiving end uses a simple The specific positions of all over-allocated subframes can be determined through calculation.

In the sixth implementation manner, 3 bits are fixedly required to indicate the position of the over-allocated subframe.

Taking the subframe that includes the over-allocated subframe as the first third number of subframes in the initial subframe as an example, the description is as follows:

Assume that the number of subframes actually required by the current service is 45, and assume that the determined MSAP is as follows:

radioframeAllocationPeriod=n4

radioframeAllocationOffset=0,

subframeAllocation=CHIOCE{oneFrame{111111}}

Since there are 3 over-allocated subframes, it is specified as:

The second subframe in the first radio frame;

The third subframe in the first radio frame;

The 4th subframe in the 1st radio frame.

According to method six, the sixth amendment instruction is as follows:

011

After the receiving end takes 3 bits to determine the number of over-allocated subframes, it determines that the first three subframes in the initial subframe are over-allocated subframes, that is, the second, third, and fourth subframes in the first radio frame.

The above provides six specific implementation manners of the correction module, but it should be understood that there are other manners capable of indicating the location of the over-allocated subframe, which will not be described here one by one.

At the same time, in the above-mentioned implementation mode 1, implementation mode 2 and mode 4, the correction instruction all involves the serial number of the over-allocated subframe in the radio frame. The sequence number of the subframe in the radio frame is assigned to indicate the position. Since there are 10 subframes in a radio frame, 4 bits are required for indication.

However, considering that in a radio frame, only 6 subframes can be used for the transmission of MBMS data at most, therefore, in the above-mentioned implementation mode 1, implementation mode 2 and mode 4, it is also possible to use allocating subframes that can be used in the radio frame The position is indicated by the sequence number in the subframe of the MBMS data transmission. Since only 6 subframes in the radio frame can be used for MBMS data transmission at most, only 3 bits are required for indication.

At the same time, the above six methods are all explained with subframeAllocation=CHIOCE{oneFrame{...}}, but it should be understood that they are also applicable to subframeAllocation=CHIOCE{fourFrame{... }}, of course, also applies to other subframeAllocations that may appear in the future.

In the specific embodiment of the present invention, by issuing a correction instruction on the basis of the existing technology, the correction instruction is used to indicate the position information of the over-allocated subframe, and after receiving the correction instruction, the receiving end can determine the MSAP indication for transmitting MBMS The over-indicated subframe in the initial subframe of data has the beneficial effects of the following two aspects:

First, the terminal will no longer receive data on the over-allocated subframe, which will definitely reduce the energy consumption of the terminal;

Secondly, since the terminal will not receive data from the over-allocated subframe, the over-allocated subframe can be used for transmission of unicast service data, which can improve resource utilization.

Assume that there are 3 over-allocated subframes, the bandwidth is 10MHz, and the spectral efficiency is 5bps/Hz. The resource gain brought by these 3 over-allocated subframes is as follows: 10MHz*5bps/Hz*3/320=0.47Mbps.

The above correction command can be carried by the SIB on the BCCH, of course, the premise is that the SIB carrying the correction command has enough undefined bytes, which can be used for transmission of the correction command. Of course, the correction command can be transmitted through the MCCH.

According to the example in Method 1, the format of the first modification instruction is as follows:

00000 001 00100 010 11100 0011. It’s just that 001, 010, and 011 represent the first, second, and third subframes of the wireless frame that can be used for MBMS data transmission. Considering that the first subframe of the wireless frame cannot be used for MBMS data transmission, so for the whole radio frame, it is the 2nd, 3rd and 4th subframes.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (12)

1. a resource indicating method, the many cell transmission pattern for multimedia broadcast multicast system MBMS, is characterized in that, comprising:

According to the service feature of MBMS business, obtain the first number, described the first number is the number of the subframe of described MBMS business actual needs in the dispatching cycle;

According to described the first number, determine a transmission channel sub-frame allocation pattern MSAP instruction; Described MSAP instruction is used to indicate the initial subframe for MBMS transmission data of the second number, and described the second number is in the number of subframes that can indicate of MSAP indicating means, to be more than or equal to the minimum value of described the first number;

When described the first number is less than described the second number, from described initial subframe, select the over-allocation subframe of the 3rd number, and according to selection result, generating the revision directive of indicating described over-allocation subframe position, described the 3rd number is the difference of described the second number and described the first number;

Sending described MSAP instruction and revision directive to receiving terminal, indicate described receiving terminal, is finally the subframe of described initial subframe except described over-allocation subframe for transmitting the subframe of MBMS data in dispatching cycle.

2. resource indicating method according to claim 1, is characterized in that, described revision directive sends to described receiving terminal by broadcast channel or the point-to-multipoint control channel MCCH of MBMS.

3. resource indicating method according to claim 2, is characterized in that, the described over-allocation subframe of selecting the 3rd number from described initial subframe, and specifically comprise according to the revision directive that selection result generates the described over-allocation subframe position of indication:

From described initial subframe, select arbitrarily the over-allocation subframe of the 3rd number;

Determine the position of the over-allocation subframe of selecting;

Generate the first revision directive, described the first revision directive comprises the sequence number of the radio frames at over-allocation subframe place described in each, and the sequence number of over-allocation subframe in radio frames described in each.

4. resource indicating method according to claim 2, is characterized in that, the described over-allocation subframe of selecting the 3rd number from described initial subframe, and specifically comprise according to the revision directive that selection result generates the described over-allocation subframe position of indication:

From described initial subframe, select the over-allocation subframe of the 3rd number, in described initial subframe, described over-allocation subframe continuous distribution;

Generation comprises the 4th revision directive of described the 3rd number, the first sequence number and the second sequence number;

Described the first sequence number is the sequence number of the radio frames at first over-allocation subframe place;

Described the second sequence number is the sequence number of described first over-allocation subframe in radio frames.

5. resource indicating method according to claim 2, is characterized in that, the described over-allocation subframe of selecting the 3rd number from described initial subframe, and specifically comprise according to the revision directive that selection result generates the described over-allocation subframe position of indication:

From described initial subframe, select the subframe of the 3rd number as over-allocation subframe, in last a 4th number radio frames of described over-allocation subframe distribution in the radio frames of described MSAP instruction indication, described in each, in a 4th number radio frames, last a 5th number subframe that belongs to described initial subframe is over-allocation subframe; Amassing of described the 4th number and the 5th number is the 3rd number;

Generation comprises the 5th revision directive of described the 4th number and the 5th number.

6. resource indicating method according to claim 2, is characterized in that, the described over-allocation subframe of selecting the 3rd number from described initial subframe, and specifically comprise according to the revision directive that selection result generates the described over-allocation subframe position of indication:

From described initial subframe, according to from back to front or vertical order select successively the subframe of the 3rd number as over-allocation subframe;

Generation comprises the 6th revision directive of described the 3rd number.

7. an enhanced base station, the many cell transmission pattern for multimedia broadcast multicast system MBMS, is characterized in that, comprising:

The first number determination module, for obtaining the first number according to the service feature of MBMS business, described the first number is the number of the subframe of described MBMS business actual needs in the dispatching cycle;

The first instruction generation module, for determining a transmission channel sub-frame allocation pattern MSAP instruction according to described the first number; Described MSAP instruction is used to indicate the initial subframe for MBMS transmission data of the second number, and described the second number is in the number of subframes that can indicate of MSAP indicating means, to be greater than the minimum value of described the first number;

The second instruction generation module, for when described the first number is less than described the second number, from described initial subframe, select the over-allocation subframe of the 3rd number, and according to selection result, generating the revision directive of indicating described over-allocation subframe position, described the 3rd number is the difference of described the second number and described the first number;

Sending module, for sending described MSAP instruction and revision directive to receiving terminal, indicates described receiving terminal, in dispatching cycle, for transmitting the subframe of MBMS data, is finally the subframe of described initial subframe except the subframe of described over-allocation;

Service Processing Module, for utilizing the subframe of described initial subframe except the subframe of described over-allocation to process described MBMS business.

8. enhanced base station according to claim 7, is characterized in that, described revision directive sends to described receiving terminal by broadcast channel or the point-to-multipoint control channel MCCH of MBMS.

9. enhanced base station according to claim 8, is characterized in that, described the second instruction generation module specifically comprises:

For selecting arbitrarily the unit of the over-allocation subframe of the 3rd number from described initial subframe;

For determining the unit of the position of the over-allocation subframe of selecting;

For generating the unit of the first revision directive, described the first revision directive comprises the sequence number of the radio frames at over-allocation subframe place described in each, and the sequence number of over-allocation subframe in radio frames described in each.

10. enhanced base station according to claim 8, is characterized in that, described the second instruction generation module specifically comprises:

For select the unit of the over-allocation subframe of the 3rd number from described initial subframe, in described initial subframe, described over-allocation subframe continuous distribution;

For generating the unit of the 4th revision directive that comprises described the 3rd number, the first sequence number and the second sequence number;

Described the first sequence number is the sequence number of the radio frames at first over-allocation subframe place;

Described the second sequence number is the sequence number of described first over-allocation subframe in radio frames.

11. enhanced base stations according to claim 8, is characterized in that, described the second instruction generation module specifically comprises:

For selecting the subframe of the 3rd number as the unit of over-allocation subframe from described initial subframe, in last a 4th number radio frames of described over-allocation subframe distribution in the radio frames of described MSAP instruction indication, described in each, in a 4th number radio frames, last a 5th number subframe that belongs to described initial subframe is over-allocation subframe; Amassing of described the 4th number and the 5th number is the 3rd number;

For generating the unit of the 5th revision directive that comprises described the 4th number and the 5th number.

12. enhanced base stations according to claim 8, is characterized in that, described the second instruction generation module specifically comprises:

For from described initial subframe, according to from back to front or vertical order select successively the subframe of the 3rd number as the unit of over-allocation subframe;

For generating the unit of the 6th revision directive that comprises described the 3rd number.