CN102100090B

CN102100090B - Method and apparatus for recognizing multicast and broadcast service region in broadband wireless communication system

Info

Publication number: CN102100090B
Application number: CN200980127825.7A
Authority: CN
Inventors: 孙泳文; 沈哉廷; 薛志允; 林爱利
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2008-07-17
Filing date: 2009-07-16
Publication date: 2015-01-21
Anticipated expiration: 2029-07-16
Also published as: KR20100009446A; KR101497607B1; CN102100090A

Abstract

A method and an apparatus for recognizing a Multicast and Broadcast Service (MBS) region in a broadband wireless communication system are provided. In the method, whether a next MBS MAP message transmission point of a first frame and an MBS data burst transmission point indicated by MBS burst assignment information of a second frame match with each other in a third frame is determined. When matching with each other in the third frame, a control message including information for determining a starting point of an MBS region is generated. The generated control message is transmitted during one of the first and second frames.

Description

The method and apparatus of multicast and broadcast service zone is identified in system of broadband wireless communication

Technical field

The present invention relates to the multicast in wireless communication system and broadcasting service (Multicast and Broadcast Service, MBS).More specifically, the present invention relates to the method and apparatus for being identified MBS region in a broadband wireless communication system by MBS daisy chain (DaisyChain) mechanism.

Background technology

As in the 4th generation (4G) communication system of next generation communication system, carrying out the research for utilizing the transmission speed of about 100Mbps to provide the business with various service quality (Quality of Services, QoS) to user energetically.More specifically, carrying out energetically for thinking that broadband wireless access (BWA) communication system of such as WLAN (wireless local area network) (LAN) system and wireless MAN (MAN) system ensures that the form of mobility and QoS supports the research of high speed business.In addition, with regard to representational communication system, there is Institute of Electrical and Electric Engineers (IEEE) 802.16 system.

System of broadband wireless communication based on IEEE 802.16 provides internet, based on the speech (VoIP) of Internet Protocol and non real-time stream business as basic service.In addition, have recently emerged a kind of new business, i.e. Multimedia Broadcast Multicast Service (Multicast Broadcast Service, MBS), it is a kind of real time broadcasting service.More specifically, in MBS, multiple base station sends broadcast data burst (burst) using same-code scheme by identical frequency and time resource, even thus the terminal being positioned at cell edge also can be merged by radio frequency (RF) and obtain grand diversity effect.

Fig. 1 shows descending (DownLink, the DL) frame structure providing MBS in traditional system of broadband wireless communication.

As shown in Figure 1, in order to support grand diversity, a part for frame is defined as MBS region 150 by multiple base station, and sends MBS data burst 111,113 and 115 by this MBS region 150.Here, the position in MBS region is transmitted by DL MAP (mapping) message 103.DL MAP message 103 comprises MBS_MAP_IE 105.MBS_MAP_IE 105 comprises the positional information of MBS MAP message 107, and MBS MAP message 107 comprises distribution (assignment) information of MBS data burst 111 to 115.Therefore, terminal identifies the position of MBS MAP message 107 by DL MAP message 103, and identified position and the coded message of the MBS data burst 111 to 115 in the position in MBS region 150 and MBS region 150 by MBS MAP message 107, thus receive MBS data burst 111 to 115.

In other words, in order to receive MBS data burst 111 to 115, associated terminal is decoded the MBS_MAP_IE 105 be included in DL MAP message 103, use the MBS_MAP_IE 105 of decoding to decode MBS MAP message 107, and use the MBS_DATA_IE 109 be included in MBS MAP message 107 to identify position and the coded message of MBS data burst 111 to 115.

When every frame send various MBS MAP information and MBS MAP message with decode MBS data burst 111 to 115 time, can expense be produced.In order to reduce this expense, MBS daisy chain mechanism can be used.MBS daisy chain mechanism only can decode MBS MAP message 107 to receive MBS data burst, and without the need to DL MAP message 103 of decoding.

But, suppose that the starting point in MBS data burst position and MBS region is mated mutually, in MBS daisy chain mechanism, when being carried out the MBS region that sends according to transmission cycle of MBS data burst by it and existed for the MBS MAP message of different MBS data burst simultaneously, MBS does not mate mutually in end in region.Thus MBS daisy chain mechanism possibly cannot correctly receive MBS data burst.

Summary of the invention

An aspect of of the present present invention is intended at least solve the problem and/or shortcoming, and at least provides following advantage therefore, and an aspect of of the present present invention is provided for the method and apparatus identifying MBS region in a broadband wireless communication system.

Another aspect of the present invention is provided for the method and apparatus of the MBS region mismatch problem solved in a broadband wireless communication system caused by MBS daisy chain mechanism.

Another aspect of the invention is provided for configuring MBS MAP message in a broadband wireless communication system to solve the method and apparatus of MBS region mismatch problem.

Another aspect of the invention is provided for configuring MBS DATA (data) IE in a broadband wireless communication system to solve the method and apparatus of MBS region mismatch problem.

According to an aspect of the present invention, one is provided to operate base station in a broadband wireless communication system to identify the method in multicast and broadcasting service (MBS) region.The method comprises: determine whether next MBS MAP message sending point of the first frame and the MBS data burst sending point indicated by the MBS burst allocation information of the second frame mutually mate in the 3rd frame; When mutually mating in the 3rd frame, produce the control message of the information of the starting point comprised for determining MBS region; And in one of the first frame and the second frame, send the control message produced.

According to a further aspect in the invention, provide a kind of operating terminal in a broadband wireless communication system to identify the method in MBS region.The method comprises: receive MBS MAP message, and this MBS MAP message indicates in the associated frame cycle from the position of the MBS data burst of base station; From received MBSMAP message extraction for determining the information of the starting point in MBS region; Use the starting point in the MBS region in the information determination associated frame extracted; And MBSMAP message of decoding from the starting point in MBS region is to receive MBS data burst.

In accordance with a further aspect of the present invention, provide a kind of in a broadband wireless communication system for identifying the base station apparatus in MBS region.This device comprises: scheduler, for determining whether the MBS data burst sending point corresponding with the MBS_DATA_IE of the second frame, next MBS MAP message sending point of the first frame mutually mates in the 3rd frame; Message builder, for when mutually mating in the 3rd frame, produce control message, this control message comprises the information of the starting point for determining MBS region; And transmitter, for sending the control message produced in one of the first frame and the second frame.

In accordance with a further aspect of the present invention, provide a kind of in a broadband wireless communication system for identifying the terminal installation in MBS region.This device comprises: receiver, and for receiving MBS MAP message, this MBSMAP message indicates in the associated frame cycle from the position of the MBS data burst of base station; Message reader, for extracting the information of the starting point for determining MBS region from received MBS MAP message; And controller, for using the starting point in the MBS region in extracted information determination associated frame, wherein, described receiver decodes MBS MAP message to receive MBS data burst from the starting point in MBS region.

In accordance with a further aspect of the present invention, provide a kind of base station that operates in a broadband wireless communication system to identify the method in MBS region.The method comprises: determine whether next MBS MAP message sending point of the first frame and the MBS data burst sending point indicated by the MBS burst allocation information of the second frame mutually mate in the 3rd frame; And when they mutually mate in the 3rd frame, the information of descending (DL) MAP message of instruction the 3rd frame is incorporated to the MBS burst allocation information of the second frame, and sends this MBS burst allocation information.

In accordance with a further aspect of the present invention, provide a kind of base station that operates in a broadband wireless communication system to identify the method in MBS region.The method comprises: determine whether next MBS MAP message sending point of the first frame and the MBS data burst sending point indicated by the MBS burst allocation information of the second frame mutually mate in the 3rd frame; And when they mutually mate in the 3rd frame, the deviant of the starting point in instruction MBS region is incorporated to the MBS burst allocation information of the second frame, and sends this MBS burst allocation information.

In accordance with a further aspect of the present invention, provide a kind of base station that operates in a broadband wireless communication system to identify the method in MBS region.The method comprises: determine whether next MBS MAP message sending point of the first frame and the MBS data burst sending point indicated by the MBS burst allocation information of the second frame mutually mate in the 3rd frame; And when they mutually mate in the 3rd frame, generate in the MBS MAP message of the second frame for the skew of each MBS burst frame from DL subframe to the offset information of the starting point in MBS region, and send this MBS MAP message.

In accordance with a further aspect of the present invention, provide a kind of operating terminal in a broadband wireless communication system to identify the method in MBS region.The method comprises: the information determining whether there is instruction decoding DL MAP message while using MBS daisy chain to receive MBS burst; And when there is the information of instruction decoding DLMAP message, this DL MAP message of decoding is to determine MBS region.

In accordance with a further aspect of the present invention, provide a kind of operating terminal in a broadband wireless communication system to identify the method in MBS region.The method comprises: the skew determining the starting point that whether there is instruction MBS region in MBS burst allocation information while using MBS daisy chain to receive MBS burst; And use this skew to determine the starting point in MBS region.

In accordance with a further aspect of the present invention, provide a kind of operating terminal in a broadband wireless communication system to identify the method in MBS region.The method comprises: determine whether there is while using MBS daisy chain to receive MBS burst for each MBS burst frame skew from DL subframe to the offset information of the starting point in MBS region, depend on whether described offset information exists, determine the skew of the starting point in the instruction MBS region in MBS burst allocation information for each MBS burst frame skew, and use the skew for each MBS burst frame skew to determine the starting point in MBS region.

To those skilled in the art, from the specific descriptions disclosing one exemplary embodiment of the present invention below in conjunction with accompanying drawing, other aspects of the present invention, advantage and prominent features will become clear.

Accompanying drawing explanation

By the description below in conjunction with accompanying drawing, the above-mentioned and other aspects, features and advantages of some one exemplary embodiment of the present invention will clearly, in accompanying drawing:

Fig. 1 shows in conventional broadband wireless communication system for providing the example of the frame structure of MBS;

Fig. 2 shows according to the MBS daisy chain mechanism in the system of broadband wireless communication of one exemplary embodiment of the present invention;

Fig. 3 shows the flow chart of the process for operating base station in a broadband wireless communication system according to one exemplary embodiment of the present invention;

Fig. 4 shows the flow chart for the process of operating terminal in a broadband wireless communication system according to one exemplary embodiment of the present invention;

Fig. 5 shows the flow chart for the process of operating terminal in a broadband wireless communication system according to one exemplary embodiment of the present invention;

Fig. 6 illustrates the block diagram according to the base station in the system of broadband wireless communication of one exemplary embodiment of the present invention; And

Fig. 7 illustrates the block diagram according to the terminal in the system of broadband wireless communication of one exemplary embodiment of the present invention.

Run through accompanying drawing, identical reference marker refers to identical part, assembly and structure by being understood to.

Embodiment

The description referring to accompanying drawing is provided to be one exemplary embodiment of the present invention in order to help complete understanding claim and equivalent thereof to define.It comprises various detail to help to understand, but these details should only be counted as exemplary.Therefore, persons of ordinary skill in the art will recognize that and can make various changes and modifications embodiment described herein and not depart from scope and spirit of the present invention.Further, for clarity and conciseness, the description to known function and structure is eliminated.

The term below described and use in claim and word are not limited to literal meaning, but are only used for people being known and as one man understanding the present invention by inventor.Therefore, those skilled in the art are noted that and provide the following description to one exemplary embodiment of the present invention to be only for illustrational object, instead of in order to limit the present invention, the present invention is by claims and equivalents thereof.

Will be understood that, singulative " " and " being somebody's turn to do " comprise a plurality of referents, unless context clearly provides contrary instruction.Such as, include one or more surface like this when thus, mentioning " assembly surface ".

One exemplary embodiment of the present invention provides a kind of for providing the method for broadcasting service in cellular radio Communication system.More specifically, one exemplary embodiment of the present invention provides a kind of method for reducing the expense caused due to MBSMAP message.

Here, depend on standard group or operator, broadcasting service can be referred to as multicast and broadcasting service (Multicast and Broadcast Service, MCBCS), multicast and broadcasting service (MBS), MBMS (Multimedia Broadcast and Multicast Service, MBMS), broadcast/multi broadcast business (BroadCast/MultiCast Service, BCMCS), DMB (Digital Multimedia Broadcasting DMB) or MediaFLO.

In the following description, the title of network entity or network element (Network Element NE) according to correlation function definition, and can change according to standard group or operator.Such as, base station (BS) can be referred to as access point (Access Point, AP), radio access station (Radio Access Station, RAS) or Node B.Equally, base station controller can be referred to as radio network controller (Radio Network Controller, RNC), base station controller (Base Station Controller, BSC), access control router (Access Control Router, or access business network gateway (Access Service Network-Gate Way, ASN-GW) ACR).

Hereinafter, by be described based on the system of broadband wireless communication of OFDM/OFDM (OFDM)/(OFDMA).Note, the present invention is applicable to any wireless communication system providing broadcasting service, and has nothing to do with scheme.

Table 1 below gives the form of the MBS MAP IE 105 of Fig. 1

Table 1

In Table 1, the identifier in the relevant MBS region of MBS sector marker (MBS Zone identifier) instruction, and OFDMA symbol skew (OFDMA Symbol Offset) instruction is present in the start offset of the MBS MAP message 107 in MBS region 150.This skew represents the symbol offset (Symbol Offset) in frame.The starting point of MBS MAP message 107 represents the starting point in MBS region 150.That is, MBS MAP message 107 always should be positioned at the starting point in MBS region 150.

Information after lower between-line spacing uses code (Downlink Interval Usage Code, DIUC) change instruction (DIUC change indication) comprises the size information of MBS MAP message 107 and the information needed for decoding MBS MAP message 107.

MBS region 150 comprises MBS MAP message 107 and MBS data burst 111,113 and 115, and this MBS MAP message 107 comprises MBS_Data_IE 109.

MBS MAP message 107 comprises the terminal that receives MBS business in order to the information needed for the position of MBS data burst of decoding and this data burst.The form of MBS MAP message 107 is provided by table 2 below.

Table 2

In table 2, MBS MAP message comprises multiple IE (that is, indicating the management message type (Management message type) of the type of message that will send), frame number and MBS data burst information and media interviews control (MAC) general header (MAC Generic Header).This frame number is identical with the frame number of DL-MAP, and MBS DIUC change count (MBS DIUC Change Count) informs that whether MBS data burst profile (profile) is identical with previous MBS data burst profile.If MBS DIUC change count changes, then user terminal should receive the DL burst profile information comprised with the form of the type-length-value (Type-Length-Value, TLV) of MBS MAP message 107.Alternatively, if do not comprise DL burst profile information in MBS MAP message 107, then terminal should pass through next Downlink Channel Descriptor (Downlink Channel Descriptor, DCD) message sink DL burst profile information.The MBS data burst information that MBS_DATA_IE 109 and MBS_DATA_Time_Diversity_IE (not shown) indicating terminal will receive.That is, the information in region 111,113 and 115 that is sent to of the MBS data burst of MBS_DATA_IE 109 indicator diagram 1.MBS_DATA_Time_Diversity_IE is similar to MBS_DATA_IE 109, and the MBS data burst information distributed when being included in the MBS data burst only existed for the terminal supporting hybrid automatic repeat-request (Hybrid Automatic Repeat Request, H-ARQ).

Following table 3 shows the form of the MBS_DATA_IE 109 of Fig. 1.

Table 3

In table 3, MBS_DATA_IE informs the multicast identifier corresponding with IE, MBS data receiver position and the information needed for decoding MBS data.MBS burst frame skew (MBS Burst Frame Offset) of table 3 indicates the skew from the frame to the actual frame be assigned to of MBS data burst that wherein have sent current MBS MAP message.More particularly, the skew of MBS burst frame has the skew of 2 to 5 frames comprising the frame that wherein have sent current MBS MAP message.Even if there is not MBS MAP message, the region that wherein only there is MBS data burst is also included within MBS region.

Next MBS vertical shift (Next MBS Frame Offset) is used to refer to the frame by sending next MBS MAP message wherein.That is, next MBS vertical shift instruction is from the skew of the frame to the frame by sending next MBS MAP message wherein that wherein have sent current MBS MAP message.Next MBS OFDMA symbol skew (Next MBS OFDMA symbol offset) is used to refer to the original position (or the starting point in MBS region) of the inner MBS MAP message of frame specified by next MBS vertical shift.That is, the relative value (OFDMA symbol offsets (OFDMA Symbol Offset)) starting to separate of next MBS OFDMA symbol skew instruction and associated frame.Thus the instruction MBS region, position of MBS MAP message, because MBS MAP message is positioned at the starting point in MBS region.

In brief, position and the information of MBS data burst can be learnt by MBS_DATA_IE 109, and the transmitting time of next MBS MAP message can be learnt in advance.

As mentioned above, terminal can by first at arbitrfary point decoding MBS_MAP_IE once, the MBS MAP message of decoding MBS_MAP_IE instruction the MBS_DATA_IE of MBS MAP message of decoding and learn following information.

Terminal can know the MBS data burst of associated terminal by the frame be sent to, in the location/size of the inner MBS data burst of this associated frame, next MBS MAP message by the frame that is sent to and the starting point in the inner MBS MAP message of this frame.

If base station formulates rule is to be placed on the starting point in MBS region by the MBS data burst position of particular frame (frame by specified by next MBS vertical shift of table 3), even if then the terminal MBS_MAP_IE that no longer decodes also can know the starting point in MBS region.That is, if terminal at first at arbitrfary point decoding MBS_MAP_IE once and repeat above-mentioned process, even if then terminal no longer receives/decodes DL MAP message and also can continue to receive MBS data.This operation is called as MBS daisy chain mechanism

But, even MBS daisy chain mechanism also has limitation, this is illustrated with reference to Fig. 2

Fig. 2 shows according to the MBS daisy chain mechanism in the system of broadband wireless communication of one exemplary embodiment of the present invention.

With reference to Fig. 2, from intermediate frame 210, terminal can know the starting point (that is, the position of MBS MAP message 215) in MBS region in same frame, and to be decoded MBS MAP message 215 by the MBS_MAP_IE 216 of DL-MAP message.MBS MAP message 215 has 3 MBS_DATA_IE.Two MBS_DATA_IE 213 indicate and the MBS data burst position of present frame every the frame 220 of 1 frame.As described in reference to table 3, the position 260 of next MBS vertical shift field value instruction (250) next MBS MAP message of two MBS_DATA_IE 213.

Another MBS_DATA_IE 214 indicate with the MBS data burst position of present frame in the frame 230 of 2 frames.Further, next MBS vertical shift field value of MBS_DATA_IE 214 can indicate the position different from the position of next the MBS MAP message specified by two MBS_DATA_IE 213.This be due to MBS channel between the difference in transmission cycle (period).But, in fig. 2, assuming that this next MBS vertical shift field value is identical with the position of next the MBSMAP message specified by two MBS_DATA_IE 213.

Can release from the above description, according to the transmission cycle of MBS data burst, in the namely transmission cycle of MBS channel, the MBS MAP message of different MBS data burst (that is, different MBS channel) can be arranged in the MBS region that MBS data burst is sent to.Such as, send a message, this message not only comprises the information of the MBS data burst 231 about MBS_Data_IE 214, and comprise about indicated by the MBS_DATA_IE of the MBS MAP message 201 of frame 200, next MBS MAP message will be sent to the information of the frame 230 of (240), thus can be present in the MBS region of the 3rd frame 230 that will send for the MBS MAP message 232 of another different MBS channel simultaneously.In this case, when machine-processed by when being identified as the starting point in MBS region near the starting point of the MBS data burst 231 of the start-up portion of frame in MBS data burst by MBS daisy chain, the position in actual MBS region is position A235, but is position B 236 by MBS daisy chain mechanism terminal by the location recognition in MBS region.Therefore, there is not mating of MBS region.In other words, due to MBS_MAP_IE and the MBS MAP message/MBS_DATA_IE of the frame 200 or 220 that the terminal of the MBS MAP message 215 of frame 210 of having decoded is not decoded previous, so terminal can not identify the existence of the MBS MAP message 232 be positioned at before MBS data burst 231.Therefore, the starting point using MBS daisy chain mechanism the starting point of the MBS data burst of the beginning near frame to be identified as MBS region has limitation.

When terminal can not identify the starting point in MBS region exactly, channel is estimated and MBS data burst of can not correctly decoding in end-error ground.

In the following description, the not match information in MBS region is informed to solve the circumscribed exemplary method of MBS daisy chain mechanism by a kind of for description for point unmatched in MBS region.

As the first one exemplary embodiment, the MBS_DATA_IE to table 3 adds following parameter.

Table 4

Here, even if perform MBS daisy chain mechanism, as decoding terminals MBS_DATA_IE, if this parameter is set to 1, then Read_MBS_MAP_IE represents to there is MBS MAP message in the MBS region being offset the frame of specifying by MBS burst frame, or different from the starting point in MBS region near the starting point of the MBS data burst of the beginning of frame.Therefore, the MBS_MAP_IE (see table 1) in decoding terminals DL MAP message, to identify the starting point in MBS region.If this parameter is set to 0, then Read_MBS_MAP_IE represents that the starting point of the MBS data burst of the beginning near frame is identical with the starting point in MBS region.

As the second one exemplary embodiment, the MBS_DATA_IE to table 3 adds following parameter.

Table 5

Here, true OFDMA symbol skew (Real OFDMA Symbol Offset of MBS Permutation zone) of MBS arrangement section represents that the OFDMA symbol from the starting point of the frame specified by the skew of MBS burst frame to MBS region offsets.

In the second one exemplary embodiment, with the addition of " the true OFDMA symbol skew that MBS arranges section " to MBS_DATA_IE.But, when there being multiple MBS_DATA_IE to be included in MBS MAP message, if multiple MBS_DATA_IE is categorized as some groups, that is, if after some MBS data bursts are positioned at two frames from present frame, after some MBS data bursts are positioned at 3 frames from present frame, after some MBS data bursts are positioned at 4 frames from present frame, and after some MBS data bursts are positioned at 5 frames from present frame, then all MBS_DATA_IE may not have identical offset information.That is, release from the above description, after the MBS data burst that MBS burst frame skew (2 bit) can be used to express is positioned at 2 frames, 3 frames, 4 frames and 5 frames from present frame.

As the 3rd one exemplary embodiment, the MBS MAP message to table 2 adds following parameter.

Table 6

Here, true OFDMA symbol skew [i] (Real OFDMA Symbol Offset of MBS Permutation zone [i]) that MBS arranges section sequentially represents the OFDMA symbol deviant from the starting point of the frame (the 2/ the 3/ the 4/ 5th frames from present frame) specified by the skew of MBS burst frame to MBS region.Whenever decoding terminals MBS_DATA_IE, terminal extracts true OFDMA symbol skew [i] value that relevant MBS arranges section, to identify the starting point in the MBS region of associated frame according to the MBS burst frame deviant of MBS_DATA_IE.Such as, if burst frame skew is 2, the i.e. skew of 2+2=4 frame, it is the 4th vertical shift being offset the frame of specifying by MBS burst frame, thus terminal extracts the OFDMA symbol deviant that MBS arranges true OFDMA symbol skew [2] of section, extracted value to be used as the starting point in the MBS region of associated frame.

As the 4th one exemplary embodiment, even if terminal supports MBS daisy chain mechanism, terminal also may not support base station.In this case, following parameter is consulted.

Table 7

TLV coding can be included in the message of such as SBC-REQ/RSP.Depend on concrete condition, similar message can be used hold consultation.Such as, if this TLV is not included in the message for consulting, that is, if this parameter is default value 0, then MBS daisy chain mechanism is not supported in the instruction of this parameter.Even if terminal sends this parameter being set to 1, when base station does not comprise this parameter or transmission is set to this parameter of 0, base station also indicates it not support MBS daisy chain mechanism.This indicating terminal uses traditional MBS, and does not use MBS daisy chain mechanism.Therefore, terminal is used as the method being identified MBS region by decoding DL MAP message and the decoding MBS_MAP_IE be included in DL MAP message of conventional method.

In above-described 3rd one exemplary embodiment, the OFDMA symbol deviant that the true OFDMA symbol that the MBS from the starting point of the frame (the 2/ the 3/ the 4/ 5th vertical shifts from present frame) specified by the skew of MBS burst frame to MBS region arranges section offsets [i] is sequentially determined.But if the MBS_DATA_IE be included in MBS MAP message unreferenced (refer to) all MBS arrange true OFDMA symbol skew [i] of section, then the value be not cited may become expense.Such as, if all MBS_DATA_IE of MBS MAP message are positioned at the 2nd vertical shift, then all MBS_DATA_IE only quote true OFDMA symbol skew [0] that MBS arranges section.Now, MBS arranges true OFDMA symbol skew [2] of section, [3] and [4] become parameter without the need to transmission.Therefore, according to the 5th one exemplary embodiment, the MBS only needing the MBS_DATA_IE comprising MBS MAP message to quote arranges the true OFDMA symbol skew of section.For this reason, MBS MAP message amendment (interpolation) of his-and-hers watches 6 is as follows.

Table 8

Here, each bit of MBS burst frame skew instruction (MBS Burst Frame Offset Indication) indicates respectively and arranges section whether there is MBS from the 2/ the 3/ the 4/ 5th frames with the frame that have sent MBS MAP message to it.That is, MBS burst frame skew instruction is used to specify and comprises the frame that MBS arranges section, and when base station produces MBS MAP, MBS data burst is distributed to described MBS arrangement section in base station.

According to each bit value of MBS burst frame skew instruction, the MBS included in (n+i+2) frame risen from here arranges the true OFDMA symbol skew of section, to inform that the MBS in associated frame arranges the starting point of section.Such as, if the skew of MBS burst frame is designated as 0b0101, after " N+2 frame " and " N+4 frame ", then comprise MBS arrange section, thus after MBS burst frame skew instruction, comprise the MBS arrangement section starting point that the MBS being positioned at " N+2 frame " and " N+4 frame " arranges section.Here, N is the index of the frame that MBS MAP message is sent to.

Naturally, MBS MAP message only comprises the MBS_DATA_IE in the region after sensing (N+2) frame and (N+4) frame.

Differently can use the selectivity acceptance of the true OFDMA symbol skew MBS risen from here in (n+i+2) frame being arranged to section, the true OFDMA symbol skew that wherein said MBS arranges section is for informing the parameter of the starting point of arrangement section in the 5th one exemplary embodiment.In the 5th one exemplary embodiment, when there is MBS and arranging section, the true OFDMA symbol skew that the MBS risen from here in (n+i+2) frame arranges section is unconditionally comprised, and the related bits of relative MBS burst frame skew instruction is set to 1.But, for having circumscribed frame, suggestion comprises the true OFDMA symbol skew of MBS arrangement section playing (n+i+2) individual frame from here, and the related bits of relative MBS burst frame skew instruction is set to 1 (the 6th one exemplary embodiment), wherein said limitation refers to, the position in actual MBS region is position A 235, but caused by MBS daisy chain mechanism, the location recognition in this MBS region is position B236 by terminal, the limitation of the MBS daisy chain mechanism namely described in fig. 2.In this case, when decoding MBS_DATA_IE, in MBS burst frame skew instruction, the frame be positioned at and the bit mapped are 0 by MBS data burst, terminal recognition goes out does not have relevant MBS to arrange the true OFDMA symbol skew of section in (n+i+2) frame risen from here, and, similar MBS daisy chain mechanism, starting point near that MSB data burst this frame in the MBS data burst be included in same associated frame (burst indicated by the MBS_MAP_IE with the skew of identical MBS burst frame) is identified as the starting point in MBS region.

As revealed here, be different from the 5th one exemplary embodiment, MBS_DATA_IE can be incorporated to the frame be not included in the true OFDMA symbol skew of the MBS arrangement section risen from here in (n+i+2) frame by base station, informs that the MBS in associated frame arranges the starting point of section with each bit value utilizing MBS burst frame to offset instruction.

Above-mentioned 5th one exemplary embodiment accepts for the selectivity of the true OFDMA symbol skew MBS risen from here in (n+i+2) frame being arranged to section, and the true OFDMA symbol skew that the described MBS risen from here in (n+i+2) frame arranges section is for informing that MBS arranges the parameter of the starting point of section.Similarly, above-mentioned 6th one exemplary embodiment also accepts for selectivity.According to the 7th one exemplary embodiment, the information that MBS arranges the starting point of section is configured to TLV form, and this will be described below.

Table 9 below represents the compound TLV form be included in MBS MAP message.Inform that the sub-TLV of the starting point of MBS arrangement section is included in the value position of this compound TLV.

Table 9

Type	Length	Value
			X	Variable	Compound TLV

As described below, can identify that in associated frame, MBS arranges the point of section according to the type (Type) of included sub-TLV.

The method of above-mentioned 6th one exemplary embodiment is applied to the 7th one exemplary embodiment.That is, when the frame do not existed indicated by the MBS burst frame of MBS MAP IE offsets and sub-TLV (Sub-TLV) that map, the starting point near that data burst this frame in the MBS data burst be included in same associated frame (burst indicated by the MBS_MAP_IE with the skew of identical MBS burst frame) can be identified as the starting point in MBS region by terminal.

Basis described above is described below the example operation of base station and terminal.

Fig. 3 shows the process for operating base station in a broadband wireless communication system according to one exemplary embodiment of the present invention.At first, base station is supposed can to send MBS data burst and without the need to using MBS daisy chain mechanism encoding D L MAP message.

With reference to Fig. 3, in step 301, base station determines whether it is transmission cycle of MBS MAP message.That is, send MBS MAP message in predetermined period, and the frame that should send MBS MAP message is wherein determined based on this cycle in base station.

Here, the described cycle is by the MBS burst frame offset word segment value of MBS_DATA_IE and the impact of next MBS vertical shift field value.

If base station determines it is transmission cycle of MBS MAP message, then in step 303, base station determines whether because MBS daisy chain mechanism causes the starting point in MBS region not mated.

Such as, as described in figure 2, when MBS_DATA_IE next MBS vertical shift field value indicated by the position (being called a MBS region) of next MBS MAP message and the position (being called the 2nd MBS region) of MBS data burst of distributing to the associated frame indicated by MBS burst frame offset field be applied to same frame time, the starting point in MBS region is not mated mutually.Therefore, base station can consider by scheduling, the MBS MAP transmission cycle determines that a MBS region and the 2nd MBS region are applied to the point of same frame.

In step 305, base station is incorporated to the instruction whether unmatched information in MBS region (the first one exemplary embodiment) or informs the information (second and the 3rd one exemplary embodiment) of starting point in actual MBS region, to produce at least one MBS_DATA_IE for each MBS channel.That is, base station produces for each MBS channel transmission cycle information and the start offset information that MBS_DATA_IE, this MBS_DATA_IE comprise MBS data burst, and the transmission cycle information of MBS MAP message and start offset information.Such as, as shown in table 4 or table 5, MBS_DATA_IE is configured.As a reference, if MBS region is mated mutually, then can conventionally configuration MBS_DATA_IE as shown in table 3.

And, MBS burst frame can be used to offset instruction and to comprise information (the 5th embodiment of informing and whether there is MBS arrangement section in associated frame, with reference to table 8) in exemplary implementations, the 5th one exemplary embodiment is only applied to causing MBS region mutually not mated due to MBS daisy chain mechanism and comprising the frame of information according to the 6th one exemplary embodiment.In exemplary implementations, the 5th and the 6th one exemplary embodiment can be comprised with the form of compound TLV (with reference to table 9).

After generation MBS_DATA_IE, in step 307, base station produces the MBS MAP message comprising the MBS_DATA_IE that at least one produces above.Here, when informing the sending point of next MBS MAP message by MBS MAP message, base station produces the MBS MAP message of the sending point information comprising at least one MBS_DATA_IE and next MBS MAP message.The example of MBSMAP message is provided by table 2.

After generation MBS MAP message, in step 309, base station sends MBS MAP message, then sends MBS data burst according to the information of MBS MAP message.

Afterwards, this exemplary algorithm is terminated in base station.

According to the 3rd one exemplary embodiment, when MBS_DATA_IE is divided into multiple groups, in step 303, terminal determines that the starting point in MBS region is not mated mutually, in step 305 configuration as shown in table 3 MBS_DATA_IE, and in step 307 configuration as shown in table 6 MBS MAP message.

Fig. 4 shows the process for operating terminal in a broadband wireless communication system according to one exemplary embodiment of the present invention.

With reference to Fig. 4, in step 401, whether terminal determination frame is the frame receiving MBS MAP message wherein.Here, MBS MAP message is periodically received.The acceptance point of MBS MAP message is determined by previous MBS MAP message or use frame number.

If the acceptance point of MBS MAP message, then receive in step 403 terminal and read MBSMAP message.Here, MBS MAP message comprises at least one MBS_DATA_IE.When informing the sending point of next MBS MAP message by MBS MAP message, MBS MAP message comprises the sending point information of at least one MBS_DATA_IE and next MBS MAP message.The example of MBSMAP message arrangement is provided by table 2 or table 6.

After receiving MBS MAP message, in step 405, terminal determines whether to need decoding DL MAP message by the Read_MBS_MAP_IE field value of MBS_DATA_IE.That is, if Read_MBS_MAP_IE value is 1, there is MBS MAP message in its expression, or not identical with the starting point in MBS region near the starting point of the MBS data burst of the beginning of frame in the MBS region of the frame specified by the skew of MBS burst frame.If Read_MBS_MAP_IE value is 0, then its expression is identical with the starting point in MBS region near the starting point of the MBS data burst of the beginning of this frame.

If determine that the starting point of the MBS data burst of the beginning near frame is not identical with the starting point in MBS region in step 405, then in step 407, the MBS_MAP_IE (with reference to table 1) of decoding terminals DL MAP message, to determine position and the information of MBS MAP message, and be identified in the information that MBS MAP message comprises.That is, the starting point in terminal recognition MBS region.

On the contrary, if the starting point in step 405 near the MBS data burst of the beginning of frame is identical with the starting point in MBS region, then terminal uses the starting point in this MBS region.

In step 409, terminal is determined the start offset information of the MBS data burst of each MBS channel and is sent cycle information by least one MBS_DATA_IE.That is, periodically can send the MBS data burst of each MBS channel, and MBS_DATA_IE comprise for the MBS data burst of a MBS channel start offset information and send cycle information.Here, start offset information represents the vertical shift from the frame to the frame of the MBS data burst by receiving relevant MBS channel wherein receiving MBS MAP message wherein.Such as, as shown in table 4ly MBS_DATA_IE is configured.

In step 411, terminal according in the effective coverage (valid section) of received MBS MAP message, the start offset information of the MBS data burst of each MBS channel as above determined and send cycle information and receive MBS data burst.Such as, when receiving MBS channel 1, terminal through receiving the MBS data burst of MBS channel 1 afterwards, and continues according to the cycle of transmission the MBS data burst receiving MBS channel 1 in the frame part corresponding with the start offset that the MBS_DATA_IE by MBS channel 1 determines.

Afterwards, terminal terminates this exemplary algorithm.

Fig. 5 shows the process for operating terminal in a broadband wireless communication system according to one exemplary embodiment of the present invention.

With reference to Fig. 5, in step 501, terminal determines whether this frame is the frame receiving MBS MAP message wherein.

If the acceptance point of MBS MAP message, then receive in step 503 terminal and read MBSMAP message.

After receiving MBS MAP message, in step 505, the true OFDMA symbol offset word segment value that terminal arranges section by the MBS of MBS_DATA_IE determines that the first OFDMA symbol from the starting point of the frame specified by the skew of MBS burst frame to MBS region offsets.That is, terminal determines the starting point in MBS region.

If determine that the first OFDMA symbol skew exists in step 505, then in step 507, decoding terminals is included in the MBS_DATA_IE (with reference to table 5) in DL MAP message, to determine the starting point in MBS region.

On the contrary, if there is not the first OFDMA symbol skew in step 505, then configuration MBS_DATA_IE as shown in table 3.

In step 509, terminal is determined the start offset information of the MBS data burst of each MBS channel and is sent cycle information by least one MBS_DATA_IE.That is, periodically can send the MBS data burst of each MBS channel, and MBS_DATA_IE comprise for the MBS data burst of a MBS channel start offset information and send cycle information.Here, start offset information represents the vertical shift from the frame to the frame of the MBS data burst by receiving relevant MBS channel wherein receiving MBS MAP message wherein.

In step 511, terminal according in the effective coverage of received MBS MAP message, the start offset information of the MBS data burst of each MBS channel as above determined and send cycle information and receive MBS data burst.

Afterwards, terminal terminates this exemplary algorithm.

Fig. 6 illustrates the block diagram according to the base station in the system of broadband wireless communication of one exemplary embodiment of the present invention.

With reference to Fig. 6, this base station comprises MBS MAP cycle determining unit 600, MBS scheduler 602, message builder 604, MBS data buffer 606, encoder 608, modulator 610, resource mapper 612, OFDM modulation device 614 and radio frequency (RF) transmitter 616.

MBS MAP cycle determining unit 600 determines the point by sending MBS MAP message.Such as, MBS MAP cycle determining unit 600 can use the transmission cycle to perform modular arithmetic to frame number, and the frame being ' 0 ' by modular arithmetic value is defined as the sending point of MBS MAP message.When arriving the sending point of MBS MAP message, MBS MAP cycle determining unit 600 informs the sending point of MBS MAP message to MBS scheduler 602 and message builder 604.That is, send MBS MAP message by predetermined period, and MBS MAP cycle determining unit 600 determines whether this frame is the frame that should send MBS MAP message wherein.

MBS scheduler 602 is responsible for the scheduling of MBS and is managed the transmitting scheduling information of MBS data burst.According to one exemplary embodiment, MBS scheduler 602 is provided for message builder 604 information producing MBS MAP message.That is, when providing the sending point of MBS MAP message from MBS MAP cycle determining unit 600, MBS scheduler 602 determines whether the transmission cycle of MBS data burst is applied to same frame with the transmission cycle for the MBS MAP message of other MBS data bursts.

Message builder 604 produces the MAC administrative messag that will send to terminal.Such as, message builder 604 generates and comprises the DL resource allocation information (MAP IE) of MBS region and MBS MAP message and the DL MAP message of assignment information (MBS_MAP_IE) and MBS MAP message.More specifically, message builder 604 uses the start offset information of the MBS data burst of each MBS channel provided from MBS scheduler 604 and sends cycle information and produces MBS MAP message.That is, message builder 604 produces at least one start offset information comprising the MBS data burst of each MBS channel and sends the MBS_DATA_IE of cycle information.Such as, as shown in table 4 or table 5, MBS_DATA_IE is configured.Further, message builder 604 produces the MBS MAP message comprising this at least one MBS_DATA_IE.Here, when informing the sending point of next MBS MAP message by MBS MAP message, message builder 604 produces the MBS MAP message of the sending point comprising at least one MBS_DATA_IE and next MBS MAP message.Here, the sending point information of next MBS MAP message uses the frame number comprising the frame of next MBS MAP message to represent.

MBS data buffer 606 stores the MBS data that will send temporarily, and under the control of MBS scheduler 602, export stored MBS data.

The encoder 608 of physical layer is encoded from the signaling message of message builder 604 and the data burst from MBS data buffer 606 according to modulation and encoding scheme (MCS) grade.Here, encoder 608 can use convolution code (Convolution Code, CC), Turbo code (Turbo Code, TC), CTC (Convolution Turbo Code, CTC), low-density checksum (Low Density Parity Check, LDPC) code etc.Modulator 610 according to the encoded grouping of MCS hierarchical modulation from encoder 608, to produce modulated symbol.Such as, modulator 610 can use Quadrature Phase Shift Keying (Quadrature Phase-Shift Keying, QPSK), 16 quadrature amplitude modulations (16Quadrature Amplitude Modulation, 16QAM), 64QAM etc.

The data-mapping of resource mapper 612 automodulation in the future device 610 is to the resource (or subcarrier) preset.OFDM modulation device 614 performs OFDM modulation, to produce OFDM symbol to the data through resource mapping from resource mapper 612.Here, OFDM modulation comprises inverse fast Fourier transform (IFFT) operation, Cyclic Prefix (Cyclic Prefix, CP) insertion etc.RF transmitter 616 converts the sampled data from OFDM modulation device 614 to analog signal, and analog signal is transformed into RF signal, to send RF signal by antenna.

With reference to Fig. 7, this terminal comprises RF receiver 700, ofdm demodulator 702, resource de-mapping device 704, demodulator 706, decoder 708, message reader 710, MBS data buffer 712 and MBS controller 714.

The RF signal received by antenna is transformed into baseband signal by RF receiver 700, and converts baseband signal to digital sample data.Ofdm demodulator 702 performs OFDM demodulation, to export frequency domain data to the digital sample data from RF receiver 700.Here, OFDM demodulation comprises CP deletion, fast Fourier transform (FFT) operation etc.Resource de-mapping device 704 extracts from the frequency domain data from ofdm demodulator 702 will the burst of demodulation.

Demodulator 706 demodulation is from the burst of resource de-mapping device 704.Decoder 708 is decoded the data of demodulated device 706 demodulation.Here, if the grouping of decoding is signaling message, then this signaling message is supplied to message reader 710.If the grouping of decoding is MBS flow, then this grouping is supplied to MBS data buffer 712.

Message reader 710 reads the control message received from base station.Further, the information identified from MBS related control information is supplied to MBS controller 714 by message reader 710.Here, MBS associated control message comprises DL MAP message and MBS MAP message, and this DL MAP message comprises MBS_MAP_IE.More specifically, message reader 710 determines the information of the assignment information of the MBS data burst determining each channel and the starting point in MBS region from least one MBS_DATA_IE be included in MBS MAP message.That is, periodically can send the MBS data burst of each MBS channel, and MBS_DATA_IE comprise for the MBS data burst of a MBS channel start offset information and send cycle information.Here, start offset information represents the vertical shift from the frame to the frame of the MBS data burst by receiving relevant MBS channel wherein receiving MBS MAP message wherein.Such as, as shown in table 4 or table 5, MBS_DATA_IE is configured.

The operation of MBS controller 714 control terminal is to receive MBS data burst.That is, MBS controller 714 controls, and receives MBS data burst with the assignment information according to the MBS data burst provided from message reader 710.More particularly, the acceptance point of MBS MAP message determined by MBS controller 714.That is, MBS MAP message is periodically received.The acceptance point of MBS MAP message or can use frame number to determine by previous MBS MAP message.But when terminal continues executive communication, terminal can identify the acceptance point of MBSMAP message by the DL MAP received at every frame.

If the acceptance point of MBS MAP message, then MBS controller 714 controls resource de-mapping device 704 and extracts DL MAP message and MBS MAP message.Here, MBS MAP message comprises at least one MBS_DATA_IE.When informing the sending point of next MBS MAP message by MBS MAP message, MBS MAP message comprises the sending point information of at least one MBS_DATA_IE and next MBSMAP message.The example of MBS MAP message configuration is provided by table 2.Therefore, MBS controller 714 controls resource (subcarrier) de-mapping device 704, so that the assignment information of the MBS data burst according to each channel, the start offset information of each channel namely in the effective coverage of received MBS MAP message and transmission cycle information, extract MBS data burst.Such as, when receiving MBS channel 1, MBS controller 714 with by the corresponding frame part of the determined start offset of the MBS_DATA_IE of MBS channel 1 through extracting the MBS data burst of MBS channel 1 afterwards, and according to sending periodic Control and continue to extract the MBS data burst of MBS channel 1.

MBS data buffer 712 stores the MBS data received from base station temporarily, and these MBS data is supplied to the module of related application layer.

As mentioned above, one exemplary embodiment of the present invention, by sending the MBS MAP message comprised for informing the MBS region not information of match point in a broadband wireless communication system, can reduce because the decoding losses of caused MBS data burst is not mated in MBS region.

Although illustrate and describe the present invention with reference to some one exemplary embodiment, but it will be appreciated by those skilled in the art that, the various changes in form and details can be made the present invention, and the spirit and scope of the present invention limited by claim and equivalent thereof can not be departed from.

Claims

1. operate base station in a broadband wireless communication system to identify the method in multicast and broadcasting service MBS region, the method comprises:

When the position of the MBS data burst indicated by the position of next MBS MAP message of the first frame and the MBS burst allocation information of the second frame is present in the 3rd frame simultaneously, identify not mating of MBS region;

Produce control message, this control message comprises the information of the decoding of the starting point in the MBS region be used to indicate in descending (DL) MAP message; And

The control message produced is sent in one of the first frame and the second frame period,

Wherein, described MBS region comprises MBS MAP message and MBS data burst region.

2. the method for claim 1, wherein, the information being used to indicate the decoding of the starting point in MBS region described in comprises: inform the information whether starting point of the MBS data burst of the beginning near the 3rd frame that will send is identical with the starting point in MBS region.

3. method as claimed in claim 2, also comprises:

When the MBS data burst starting point of the beginning near the 3rd frame that will send is not identical with the starting point in described MBS region, descending (DL) MAP message of encoding, to allow the starting point in MBS region described in terminal recognition; And

When the starting point of the MBS data burst of the beginning near the 3rd frame that will send is identical with the starting point in MBS region, allow terminal the starting point of this MBS data burst is identified as MBS region starting point and without the need to described DL MAP message of decoding.

4. the method for claim 1, wherein described in be used to indicate the decoding of the starting point in MBS region information comprise: from DL subframe to the offset information of the starting point in MBS region in described 3rd frame.

5. the method for claim 1, wherein described in be used to indicate the decoding of the starting point in MBS region information comprise: for the skew of each MBS burst frame from DL subframe to the offset information of the starting point in MBS region.

6. method as claimed in claim 5, wherein, described in be used to indicate the decoding of the starting point in MBS region information also comprise: indicate whether to exist for the skew of each MBS burst frame from DL subframe to the information of the deviant of the starting point in MBS region.

7. method as claimed in claim 5, wherein, described being merged in the form being included in the compound type-Length Value TLV MBS MAP message from DL subframe to the offset information of the starting point in MBS region for each MBS burst frame skew.

8., in a broadband wireless communication system for identifying the base station apparatus in multicast and broadcasting service MBS region, this device comprises:

Scheduler, when the position for the MBS data burst indicated by the position of next the MBS MAP message when the first frame and the MBS burst allocation information of the second frame is present in the 3rd frame simultaneously, identifies not mating of MBS region;

Message builder, for generation of control message, this control message comprises the information of the decoding of the starting point in the MBS region be used to indicate in descending (DL) MAP message; And

Transmitter, for sending in one of the first frame and the second frame period the control message produced,

Wherein, the starting point in described MBS region is identified as the position of the MBS data burst indicated by MBS burst allocation information of the second frame,

9. device as claimed in claim 8, wherein, the information being used to indicate the decoding of the starting point in MBS region described in comprises: inform the information whether starting point of the MBS data burst of the beginning near the 3rd frame that will send is identical with the starting point in MBS region.

10. device as claimed in claim 9, also comprises:

11. devices as claimed in claim 8, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: from DL subframe to the offset information of the starting point in MBS region in described 3rd frame.

12. devices as claimed in claim 8, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: for the skew of each MBS burst frame from DL subframe to the offset information of the starting point in MBS region.

13. devices as claimed in claim 12, wherein, described in be used to indicate the decoding of the starting point in MBS region information also comprise: indicate whether to exist for the skew of each MBS burst frame from DL subframe to the information of the deviant of the starting point in MBS region.

14. devices as claimed in claim 12, wherein, described being merged in the form being included in the compound type-Length Value TLV MBS MAP message from DL subframe to the offset information of the starting point in MBS region for each MBS burst frame skew.

15. 1 kinds operating terminal is to identify the method in multicast and broadcasting service MBS region in a broadband wireless communication system, and the method comprises:

Receive MBS MAP message, the instruction of this MBS MAP message is from the position of the MBS data burst of base station;

The information of the decoding of the starting point in the MBS region be used to indicate in descending (DL) MAP message is extracted from received MBS MAP message;

Determined the starting point in MBS region by decoding DL MAP message based on extracted information; And

MBS MAP message of decoding from the starting point in MBS region to receive MBS data burst,

16. methods as claimed in claim 15, wherein, the information being used to indicate the decoding of the starting point in MBS region described in comprises: inform the information whether starting point of the MBS data burst of the beginning near the frame that will send is identical with the starting point in described MBS region.

17. methods as claimed in claim 16, also comprise:

When the starting point of the MBS data burst of the beginning near the frame that will send is not identical with the starting point in described MBS region, descending (DL) MAP message of decoding, to identify the starting point in described MBS region; And

When the starting point of the MBS data burst of the beginning near the frame that will send is identical with the starting point in MBS region, the starting point of MBS data burst is identified as MBS region starting point and without the need to described DL MAP message of decoding.

18. methods as claimed in claim 15, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: the offset information from DL subframe to the starting point in MBS region in associated frame.

19. methods as claimed in claim 15, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: for each MBS burst frame skew from DL subframe to the offset information of the starting point in MBS region.

20. methods as claimed in claim 19, wherein, described in be used to indicate the decoding of the starting point in MBS region information also comprise: indicate whether to exist for each MBS burst frame skew from DL subframe to the information of the deviant of the starting point in MBS region.

21. 1 kinds in a broadband wireless communication system for identifying the terminal installation in multicast and broadcasting service MBS region, this device comprises:

Receiver, for receiving MBS MAP message, the instruction of this MBS MAP message is from the position of the MBS data burst of base station;

Message reader, for extracting the information of the decoding of the starting point in the MBS region be used to indicate in descending (DL) MAP message from received MBS MAP message; And

Controller, for controlling the starting point being determined MBS region based on extracted information by decoding DL MAP message,

Wherein, described receiver decodes MBS MAP message to receive MBS data burst from the starting point in MBS region,

22. devices as claimed in claim 21, wherein, the information being used to indicate the decoding of the starting point in MBS region described in comprises: inform the information whether starting point of the MBS data burst of the beginning near the frame that will send is identical with the starting point in described MBS region.

23. devices as claimed in claim 22, also comprise:

24. devices as claimed in claim 21, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: the offset information from DL subframe to the starting point in MBS region in associated frame.

25. devices as claimed in claim 21, wherein, described in be used to indicate the decoding of the starting point in MBS region information comprise: for each MBS burst frame skew from DL subframe to the offset information of the starting point in MBS region.

26. devices as claimed in claim 25, wherein, described in be used to indicate the decoding of the starting point in MBS region information also comprise: indicate whether to exist for each MBS burst frame skew from DL subframe to the information of the deviant of the starting point in MBS region.