WO2010051655A1

WO2010051655A1 - Method, base station and mobile station for receiving frames having mapped multi-media broadcast and multicast service data subframes

Info

Publication number: WO2010051655A1
Application number: PCT/CN2008/001855
Authority: WO
Inventors: 汪勇刚; 陈宇
Original assignee: 上海贝尔阿尔卡特股份有限公司; 阿尔卡特朗讯
Priority date: 2008-11-07
Filing date: 2008-11-07
Publication date: 2010-05-14
Also published as: CN102144412B; CN102144412A

Abstract

A method for a mobile station (MS) to receive the frames having mapped multi-media broadcast and multicast service (MBMS) data subframes from a base station (BS) is provided by the present invention. In the method, the BS acquires, from a network control end, the location number sequence of the multiple frames having mapped MBMS data subframes in the frame sequence composed of a specific number of frames; the BS processes the acquired location number sequence to enable the location numbers in the location number sequence to be denoted with signaling as consecutively as possible and delivers the signaling to the MS; the BS sends the frame sequence to the MS and the MS determines, from the received frame sequence, the frames having mapped MBMS data subframes according to the signaling delivered by the BS.

Description

Method, base station and mobile station for receiving frames mapped with MBMS data sub-frames

The present invention relates to the field of mobile communications, and more particularly to a method, a base station, and a mobile station for receiving a frame mapped with an MBMS (Multimedia Broadcast Multicast Service) data sub-frame from a base station by a mobile station, capable of moving from a base station to a mobile station The station transmits signaling indicating a sequence of position numbers in a frame sequence consisting of a specific number of frames with a plurality of signaling resources mapped with less signaling resources, thereby saving radio resources. Background technique

At the RAN2 #62 meeting of the 3GPP (3rd Generation Partnership Project), the two-level allocation scheme was agreed:

- Micro-level allocation of subframe allocation;

- Indicates the macro level assignments that can be applied at the micro level.

For the "micro level" of sub-frame allocation, all MBSFNs containing frames have the same amount of hall SFN subframes for a duration of 1 frame period. The subframe will be continuously allocated in the frame (TDD (Time Division Duplex) continuous DL (downlink) subframe). That is, there is continuity between the allocated subframes (for example, there are no 0, 4, 5 subframes for FDD (Frequency Division Duplex), and no UL (uplink) subframe for TDD). However, for macro-level allocation, further research is needed. The so-called macro level allocation involves allocating a plurality of frames mapped with MBMS service data sub-frames in a sequence of frames consisting of a specific number of frames.

There are two basic requirements for macro-level distribution.

(1) The mapping of physical frames must be dispersed as much as possible, that is, the frames allocated with the MBMS service data sub-frames are fully dispersed in time to facilitate channel measurement, scheduling, and retransmission of unicast services;

(2) Avoid over-allocation, that is, the allocation of signaling indications has more frames of MBMS service data subframes than actually allocated to save resources.

In the prior art, it has been proposed that there is full flexibility at the macro level, that is, a 32-bit map in 320 ms, that is, a 32-bit map indicates that a plurality of frames mapped with MBMS service data sub-frames are in a certain number of frames. A sequence of position numbers in the constructed frame sequence. The goal is that any combination of any number of MBSFN (Multicast Broadcast Single Frequency Network) radio frames and MBSFN radio frames is feasible, thereby avoiding the organization of MBSFN areas and the reorganization of MBMS service scheduling. Consider SIB1 (system information block 1) (repeated every 80ms) The 32-bit may be costly, and a 10-bit secondary flexibility scheme is proposed in the present application as described below.

Another prior art solution involves a 2N scheme in which only six radio frames such as 1, 2, 4, 8, 16 or 32 can be allocated to the MBSFN. The first value indicates that each radio frame includes an MBSFN subframe; the second value indicates that one frame per MB frame includes MBSFN, and the third value indicates that one frame per four radio frames includes MBSFN, and so on, such as Figure 1 shows.

The problem with the prior art solutions described above is that too many resources are wasted, an average of 9.5 subframes are over-allocated, and there is an over-allocation of less than one subframe on average for a 1-frame scheme.

In Table 1 below, the portion of the radio frame will be evaluated for data granularity, which reflects how much MBSFN data must be transmitted if MBSFN subframes are added in the scheme of 2.

Table 1: Impact of adding MBSFN subframes to increase MBSFN bandwidth

As is apparent from Table 1, from 16 radio frames to 32 radio frames, the granularity is too large for allocation. Summary of the invention

The present invention has been made in order to overcome the above disadvantages of the prior art. Accordingly, it is an object of the present invention to provide a method, a base station, and a mobile station that receive a frame mapped with an MBMS data subframe from a base station by a mobile station, and can transmit a representation from the base station to the mobile station with less signaling resources. The plurality of frames of the MBMS service data subframe are signaled by a sequence of position numbers in a sequence of frames consisting of a specific number of frames, thereby saving radio resources.

According to the present invention, a mobile broadcast multicast service is received by a mobile station from a base station.

The method for the frame of the MBMS data subframe includes: the base station acquires, from the network control end, a sequence of position numbers of a plurality of frames mapped with the MBMS service data subframe in a frame sequence consisting of a specific number of frames; and the base station processes the acquired location The numbering sequence is such that the location number in the sequence of location numbers is signaled in as continuous a manner as possible and the signaling is communicated to the mobile station; the base station transmits the sequence of frames to the mobile station, and the mobile station transmits according to the slave base station The signaling determines a frame mapped with an MBMS service data subframe from the received sequence of frames.

Preferably, the base station processes the acquired sequence of location numbers to make the location in the sequence of location numbers The 2008/001855 numbering step of signaling in as continuous a manner as possible comprises: the base station converting the sequence of position numbers into a sequence of consecutive position numbers from a minimum position number to a maximum position number, and a sequence of consecutive position numbers to be converted Expressed in the binary bit signaling.

Preferably, the binary bit signaling is composed of a continuous bit amount and a bit offset, and the bit offset indicates a starting position number of the frame in which the MBMS service data subframe is mapped in the frame sequence, and a continuous bit amount. Indicates the number of consecutive mappings of the MBMS service data subframe from the start position number.

Preferably, the step of the base station processing the acquired location number sequence to signal the location number in the location number sequence in a continuous manner as possible comprises: the base station consecutively one or more of the acquired location number sequences The location number subsequence and one or more discrete location numbers are each represented by respective respective binary bit signaling.

Preferably, each of the respective respective binary bit signalings is composed of a continuous bit amount and a bit offset, and the bit offset indicates that a frame mapped with the MBMS service data subframe is in the frame sequence. The start position number, and the continuous bit amount indicate the number of consecutively mapped frames of the MBMS service data sub-frame from the start position number.

Preferably, the sequence of frames transmitted by the base station to the mobile station is interleaved, and wherein the mobile station determines that the MBMS is mapped from the received sequence of frames according to the signaling transmitted from the base station. The step of the frame of the service data subframe includes: the base station transmitting the mapping information of the interleaving process to the mobile station; and the mobile station obtaining, according to the received mapping information of the interleaving process, the frame of each position number in the frame sequence after the interleaving process a location map; the mobile station determines a frame to which the MBMS service data subframe is mapped from the received sequence of frames based on the signaling transmitted from the base station and the location map.

Preferably, the method is suitable for a multicast broadcast single frequency network MBSFN.

In addition, according to the present invention, a base station is provided, including: an obtaining apparatus, configured to acquire, from a network control end, a sequence of position numbers in a frame sequence consisting of a specific number of frames of a plurality of frames mapped with MBMS service data subframes And a processing device, configured to process the acquired sequence of location numbers such that the location numbers in the sequence of location numbers are signaled in as continuous a manner as possible, and the transmitting device transmits the signaling to the mobile station.

Preferably, the base station further includes: an interleaving device, configured to perform interleaving processing on the frame sequence; and wherein the transmitting device sends the interleaved frame sequence and the interleaved processing mapping information to the mobile station

Preferably, the processing device converts the sequence of position numbers into a number from a minimum position to a maximum A sequence of consecutive position numbers of position numbers, and a sequence of consecutive position numbers converted to be represented by the binary bit signaling.

Preferably, the processing means respectively represents one or more consecutive position number subsequences and one or more discrete position numbers in the acquired sequence of position numbers by respective corresponding two-bit bit signals.

Preferably, the base station is located in a multicast broadcast single frequency network MBSFN.

Further, according to the present invention, a mobile station is provided, comprising: receiving means, receiving a sequence of frames from a base station, and representing a plurality of frames mapped with MBMS service data sub-frames in a continuous manner as possible by a specific number of frames Signaling of the location number sequence in the sequence of frames; and determining means for determining a frame to which the MBMS service data subframe is mapped from the received sequence of frames based on the received signaling.

Preferably, the mobile station further includes: an obtaining device, configured to obtain, according to the mapping information of the interleaving process received from the base station, a location map of the frame of each location number in the frame sequence after the interleaving process; and wherein the receiving device The mapping information of the interleaving process is received from the base station, and the determining means determines, from the received frame sequence, a frame to which the MBMS service data subframe is mapped, according to the received signaling and the location map.

Preferably, the mobile station is located in a multicast broadcast single frequency network MBSFN. DRAWINGS

The above objects, advantages and features of the present invention will become apparent from the Detailed Description of the Drawing Description

Figure 1 is a schematic illustration of a prior art 2" N solution;

2 is a schematic diagram showing an example of a layout of an MBSFN to which the present invention is applied;

3 is a frame for receiving, by a mobile station, a subframe in which an MBMS data subframe is mapped, according to an embodiment of the present invention. Flow chart of the method;

4 is a schematic diagram of interleaving a sequence of frames according to an embodiment of the present invention;

Figure 5 is a block diagram of a base station according to an embodiment of the present invention;

Figure 6 is a block diagram of a mobile station in accordance with an embodiment of the present invention. detailed description

The present invention relates to macro level allocation and proposes a 10-bit secondary flexibility scheme for signaling transfer between a base station and a mobile station, as will be described in detail later.

Fig. 2 is a schematic diagram showing an example of the layout of the MBSFN to which the present invention is applied.

As shown in FIG. 2, the MBSFN network to which the present invention is applied includes a plurality of single frequency network areas SFA1 to SFA7, and a plurality of single frequency network areas overlap each other, and each single frequency network area is composed of one or more base stations (not shown). To cover, and a plurality of mutually disjoint areas a to 1 are formed. There is a network controller (not shown) in the MBSFN network for overall control of devices (including base stations) in the network.

3 is a flow diagram of a method for receiving, by a mobile station, a frame mapped with an MBMS data sub-frame from a base station in accordance with an embodiment of the present invention.

As shown in FIG. 3, in accordance with the method of the present invention, in step 301, a base station (e.g., a base station in area a) acquires, from a network control terminal, a plurality of frames mapped with MBMS service data subframes, which are composed of a specific number of frames. A sequence of position numbers in a sequence of frames. At step 303, the base station processes the acquired sequence of location numbers to cause the location numbers in the sequence of location numbers to be signaled in as continuous a manner as possible and to communicate the signaling to a mobile station (e.g., a mobile station in area a) . In step 305, the base station performs interleaving processing on the frame. In step 307, the base station transmits the interleaved frame sequence and the interleaved mapping information to the mobile station. In step 309, the mobile station receives the interleaved frame sequence transmitted by the base station and the mapping information of the interleaving process, and obtains the frame sequence of the frame of each position number after the interleaving process according to the received mapping information of the interleaving process. Location map in . In step 31, the mobile station determines a frame to which the MBMS service data subframe is mapped from the received frame sequence based on the signal transmitted from the base station and the location map.

Referring to FIG. 2, the first scheme in which the base station processes the acquired location number sequence and is signaled is shown in Table 2. Table 2

The full flexibility column in Table 2 reflects the location number of a base station (e.g., a base station in area a) that is obtained from a network control end and has a plurality of frames mapped with MBMS service data sub-frames in a sequence of frames consisting of a specific number of frames. The sequence and the second flexibility column reflect the sequence of position numbers processed by the base station and its binary bit signaling representation.

As shown in Table 2, the base station converts the sequence of position numbers into a sequence of consecutive position numbers from the minimum position number to the maximum position number, and the converted sequence of consecutive position numbers is represented by the binary bit signal.

Here, the binary bit signaling consists of a continuous bit amount and a bit offset, the bit offset indicating a starting position number of a frame in which the MBMS service data subframe is mapped in the frame sequence, and a continuous bit amount indicating The consecutive mapping starting from the start position number has the number of frames of the MBMS service data subframe. As an example, the continuous bit amount and the bit offset may be represented by 5 bits, respectively. For example, a special bit string 11 1 11, 1 111 1 indicates that the entire 32 frames are allocated. As signaling = 00101, 01000, the amount of allocated frames is 5, and the starting frame is 8. Referring to FIG. 2, the second scheme in which the base station processes the acquired location number sequence and is signaled is shown in Table 3. table 3

As shown in Table 3, the base station expresses one or more consecutive position number subsequences and one or more discrete position numbers in the acquired position number sequence, respectively, in respective respective binary bit signalings. For example, the base station of area a denotes a discrete position number 1 with a binary bit signalling 00001, 00000, and the remaining two consecutive position number subsequences 4 and 5 are represented by a binary bit signal 00010, 00011. .

As shown in Table 3, the representation of each of the respective said binary bit signaling is similar to the representation of the binary bit signaling of Table 2. As an example, in the actual macro level allocation frame, considering unicast scheduling, retransmission, and channel measurement, it is necessary to map MBSFN radio frames as discretely as possible at the physical layer. To achieve this, the easiest way is to interleave, for example using a standardized 8 X 4 block interleaver, which will better discretize the MBSFN radio frame. Fig. 4 shows a schematic diagram of interleaving a sequence of frames.

It has been described above in the method of the present invention that the base station interleaves the sequence of frames and transmits the mapping information of the interleaving process to the mobile station for the mobile station to perform corresponding processing. It should be noted that the means for interleaving in the specific implementation of the present invention is optional, and the interleaving means is only an example of the present invention, and the present invention is not limited thereto. . Figure 5 is a block diagram of a base station in accordance with an embodiment of the present invention.

As shown in FIG. 5, the base station according to the present invention includes: an obtaining means 501, a processing means 503, an interleaving means 505, and a transmitting means 507. The obtaining means 501 acquires, from the network control terminal, a sequence of position numbers of a plurality of frames mapped with MBMS service data sub-frames in a frame sequence composed of a specific number of frames. Processing device 503 processes the sequence of location numbers obtained to cause the location numbers in the sequence of location numbers to be signaled in as continuous a manner as possible. The interleaving unit 505 performs interleaving processing on the frame sequence. The transmitting device 507 transmits the signaling to the mobile station, and transmits the interleaved frame sequence and the interleaved mapping information to the mobile station. Figure 6 is a block diagram of a mobile station in accordance with an embodiment of the present invention.

As shown in FIG. 6, the mobile station according to the present invention includes: a receiving device 601, an obtaining device 603, and a determining device 605. The receiving device 601 receives the frame sequence from the base station, and indicates, as far as possible, the signaling of the position number sequence of the plurality of frames mapped with the MBMS service data subframe in the frame sequence composed of the specific number of frames, and the interleaving process. Map information. The obtaining means 603 obtains a position map in the frame sequence after the interleaving process of the frames of the respective position numbers based on the mapping information of the interleaving process received from the base station. The determining means 605 determines, from the received sequence of frames, a frame to which the MBMS service data subframe is mapped, based on the received signaling and the location map. While the invention has been described in terms of the preferred embodiments of the present invention, it will be understood that various modifications, changes and changes may be made to the inventions without departing from the spirit and scope of the invention. Therefore, the present invention should not be limited by the foregoing embodiments, but by the appended claims and their equivalents.

Claims

A method for receiving, by a mobile station, a frame mapped with a MBMS data sub-frame of a multimedia broadcast multicast service from a base station, comprising: a base station acquiring, from a network control end, a plurality of frames mapped with an MBMS service data sub-frame by a specific number of a sequence of position numbers in a sequence of frames formed by frames;

The base station processes the acquired sequence of location weight numbers to cause the location numbers in the sequence of location numbers to be signaled in as continuous a manner as possible, and to communicate the signaling to the mobile station;

The base station transmits the sequence of frames to the mobile station, and

The mobile station determines, according to the signaling transmitted from the base station, a mapping from the received sequence of frames.

The frame of the MBMS service data subframe. begging

2. The method according to claim 1, wherein the step of the base station processing the acquired sequence of location numbers such that the location numbers in the sequence of location numbers are signaled in as continuous a manner as possible comprises: the base station will The numbering sequence is converted to a sequence of consecutive position numbers from the minimum position number to the maximum position number, and

The converted sequence of consecutive position numbers is represented by the binary bit signaling.

3. The method according to claim 2, wherein said binary bit signaling is composed of a continuous bit amount and a bit offset, and the bit offset indicates that a frame mapped with an MBMS service data sub-frame is in said frame sequence. The starting position number, and the number of consecutive bits, indicate the number of consecutively mapped frames of the MBMS service data sub-frame starting from the starting position number.

4. The method according to claim 1, wherein the step of the base station processing the acquired sequence of location numbers such that the location numbers in the sequence of location numbers are signaled in as continuous a manner as possible comprises: the base station One or more consecutive position number subsequences and one or more discrete position numbers in the sequence of position numbers are each represented by respective respective ones of said binary bit signals.

5. The method according to claim 4, wherein each of said respective said binary bit signallings is composed of a continuous bit amount and a bit offset, the bit offset indicating that the MBMS service data subframe is mapped. The starting position number of the frame in the sequence of frames, and the continuous bit amount indicates the number of consecutive frames of the MBMS service data subframe mapped from the starting position number.

6. The method according to claim 1, wherein the sequence of frames transmitted by the base station to the mobile station is After interleaving, and

The step of determining, by the mobile station, the frame mapped with the MBMS service data subframe from the received frame sequence according to the signaling transmitted from the base station includes:

The base station sends the mapping information of the interleaving process to the mobile station;

The mobile station obtains a location map of the frames of the respective location numbers in the frame sequence after the interleaving process according to the received mapping information of the interleaving process;

The mobile station determines a frame to which the MBMS service data subframe is mapped from the received frame sequence based on the signaling transmitted from the base station and the location map.

7. The method of claim 1 wherein the method is suitable for multicast broadcast single frequency network MBSFN.

8. A base station comprising:

And an obtaining device, configured to acquire, from the network control end, a sequence of position numbers of a plurality of frames mapped with MBMS service data subframes in a frame sequence consisting of a specific number of frames;

Processing means for processing the acquired sequence of position numbers such that the position numbers in the sequence of position numbers are signaled in as continuous a manner as possible, and

The transmitting device transmits the signaling to the mobile station.

9. The base station according to claim 8, further comprising:

An interleaving device for interleaving a sequence of frames;

The transmitting device transmits the frame sequence after the interleaving process and the mapping information of the interleaving process to the mobile station.

10. The base station according to claim 8, wherein said processing means converts said sequence of position numbers into a sequence of consecutive position numbers from a minimum position number to a maximum position number, and said converted sequence of consecutive position numbers is said Binary bit signaling is used to indicate.

The base station according to claim 10, wherein the binary bit signaling is composed of a continuous bit amount and a bit offset, and the bit offset indicates that a frame mapped with an MBMS service data subframe is in the frame sequence. The starting position number, and the continuous bit number, indicate the number of consecutively mapped frames of the MBMS service data sub-frame starting from the starting position number.

12. The base station according to claim 8, wherein said processing means separates one or more consecutive position number subsequences and one or more discrete position numbers in the acquired sequence of position numbers into respective ones Binary bit signaling is used to indicate.

13. The base station according to claim 12, wherein each of said respective binary bit letters Each of the commands consists of a continuous bit amount and a bit offset, the bit offset indicating the starting position number of the frame in which the MBMS service data subframe is mapped in the frame sequence, and the continuous bit amount indicating the starting position The consecutive mapping starting with the number has the number of frames of the MBMS service data subframe.

14. The base station according to claim 8, wherein the base station is located in a multicast broadcast single frequency network leg SFN.

15. A mobile station comprising: a receiving device, receiving a sequence of frames from a base station, and indicating in a as continuous as possible a position of a plurality of frames mapped with MBMS service data sub-frames in a sequence of frames consisting of a specific number of frames Signaling of the numbering sequence;

The determining means determines, based on the received signaling, a frame in which the MBMS service data subframe is mapped from the received sequence of frames.

16. The mobile station of claim 15, further comprising:

Obtaining, according to the mapping information of the interleaving process received from the base station, obtaining a position map of the frame of each position number in the frame sequence after the interleaving process;

And mapping information in which the receiving device receives the interleaving process from the base station, and the determining device determines, based on the received signaling and the location map, that the MBMS service data is mapped from the received sequence of frames The frame of the frame.

17. The mobile station of claim 15, the mobile station being located in a multicast broadcast single frequency network MBSFN.