CN100344179C - Method for receiving group broadcasting broadcast business data by mobile station in radio network - Google Patents

Abstract

The present invention discloses a method for receiving multicast broadcast service (MBS) data by a mobile station in a wireless network, which comprises the following procedures: the mobile station obtains a mapping relationship between an index number of the current modulation and encoded mode and a specific code modulation mode; the mobile station obtains an index number of a modulation and encoded mode used in a multicast broadcast service resource zone (MBS ZONE) and service resources occupied by a corresponding MBS link; the mobile station receives an updated down channel descriptor message and obtains an updated mapping relationship between the index number of the modulation and encoded mode and the specific code modulation mode; the mobile station receives MBS service data according to the obtained service resources occupied by the corresponding MBS link. The updated mapping relationship is searched and the code modulation mode corresponding to the index number is obtained according to the index number of the modulation and encoded mode to parse the MBS service data.

Description

The method of receiving group broadcasting broadcast business data by mobile station in the wireless network

Technical field

The present invention relates to the multicast and broadcast technology in the wireless network, particularly relate to the method for receiving group broadcasting broadcast business data by mobile station in a kind of wireless network.

Background technology

The IEEE 802.16 definition fixed broadband wirelesses that IEEE (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electric Engineers) formulates insert the wireless metropolitan area network standard of (BWA, Broad WirelessAccess).This standard pin is to the different physical-layer techniques of different frequency range definition, and its range of application is mainly towards dwelling house, small office/family office (SOHO), teleworker and SME (medium-sized and small enterprises) market.

IEEE 802.16 can support very disadvantageous user environment, can deal with the applied environment that has hundreds and thousands of users on each channel, supports different traffic carrying capacitys such as continous way and burst type.Has ATM (Asynchronous Transmission Mode in the network, asynchronous transfer mode) convergence sub-layer and grouping convergence sub-layer, after being handled through convergence sub-layer, a plurality of high level datas unit is packaged into a MAC (Media Access Control, the medium access control) PDU (Protocol Data Unit, protocol Data Unit) sends, can realize protocol transparency to ATM, IP (Internet Protocol, Internet protocol) and Ethernet service.

For effectively utilizing mobile network resource, introduce multicast broadcast service (MBS, Multicast and Broadcast Service) among the up-to-date agreement IEEE802.16e/D5 of IEEE802.16.The MBS business is provided among the mobile network by a data source and sends the standard of data to a plurality of users, realizes point-to-multipoint service, thereby shared network resource, improves utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.

Compare with traditional mobile network's cell broadcaste service (CBS:Cell Broadcast Service), the MBS business can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business, comply with the trend of following mobile data development.

Seeing also Fig. 1, is the structural representation of realizing the mobile network system of MBS business.

Described system comprises the multicast broadcast service Distributor (MBSServer, Multicast and Broadcast Service Server) 100 that is used for supporting the MBS business.On the one hand, MBS server 100 connects media server (Media Sever) 900, serves as content provider's inlet; On the other hand, MBS server 100 connects subordinate's base station (BS, Base Station) 200 by network, the transmission of the multicast and broadcast data of planning subordinate's base station 200, and distribution multicast broadcast data is given subordinate's base station 200.

Travelling carriage (MSS, Mobile Subscriber Station) 300 carries out data interaction, the 200 receiving group broadcast datas from the base station with base station 200.

The realization flow of MBS business mainly comprises: MBS service lists information is obtained, MBS service authentication and encryption key obtains, MBS is professional normal receives.

Seeing also Fig. 2, is the flow chart that MBS service lists information is obtained.

Because travelling carriage 300 is in wake-up states (Awake Mode) Shi Caineng and obtains MBS service lists information or MBS service authentication and encryption key, therefore, if travelling carriage 300 is in idle pulley (IDLE Mode), then needs to switch to wake-up states.

At first, relevant content server is sought in travelling carriage 300 decision inquiry MBS business tine tabulations; Secondly, travelling carriage 300 sends a HTTP Request message for one or more MBS servers 100; Subsequently, after MBS server 100 carries out respective handling, send a HTTP Response message, comprising MBS contents list, multicast ip address/port numbers etc.

Seeing also Fig. 3, is the flow chart that MBS service authentication and encryption key obtain.

After obtaining the contents list information of MBS business, travelling carriage 300 sends DSA-REQ (dynamic Service increases request) message and gives base station 200, comprising the multicast ip address/port numbers of the selected MBS business that receives; Subsequently, base station 200 sends DSX-RVD (acknowledging receipt of) message to travelling carriage 300, carries out the authentication process that the MBS business tine receives simultaneously; Through after the successful authentication and licensing process, base station 200 sends DSA-RSP (dynamic Service increases response) message, comprising MBS downlink business parameter; Travelling carriage 300 sends the PKM-REQ message to base station 200, obtaining the MBS key, and the MBS MAC PDU that receives with this secret key decryption; Base station 200 sends PKM-RSP message to travelling carriage 300, comprising the MBS key; After obtaining MBS downlink business parameter and MBS key, travelling carriage 300 can utilize the relevant MAC PDU of the message pick-up that obtains, and enters the professional accepting state of normal MBS.

MBS is professional normal to be received and mainly refers to MBS downlink business parameter that travelling carriage 300 utilizations the receive receiving course to the MBS business tine.

When receiving the MBS business for the first time, when perhaps causing the professional reception of MBS step-out owing to the channel quality variation, travelling carriage 300 needs to receive the DL_MAP message by base station 200 broadcasting, comprises among the information word MBS_MAP_IE of this message that MBS ZONE sign (MBS Zone identifier), multicast connect (Multicast CID).Travelling carriage 300 is oriented the residing position of MBS_MAP message according to the MBS_MAP_IE of this message, promptly learns the place that MBS ZONE begins, thereby begins to receive MBSM_AP message.

MBS-MAP message is to introduce in the up-to-date agreement IEEE802.16e/D5 of current I EEE802.16, and this message is transmitted in MBS ZONE, and its included information word is as shown in table 1.

Table 1

Grammer (Syntax)	Length	Remarks
			MBS-MAP_Message_Format(){
Management Message Type=	8
			Frame number	24	Identical with the frame number among the DL-MAP
for(i=0;i<n;i++){
			Multicast CID	12	12LSB of CID for multicast
DIUC	4	Modulation coding mode
			OFDMA Symbol offset	8	With respect to MBS zone
Subchannel offset	6
			Boosting	3	Power bias
No.OFDMA Symbols	7
			No.Subchannels	6
Repetition Coding Indication	2	Circulation decoding indication
			Next MBS frame offset	8	The position of next MBS traffic frame
Next MBS OFDMA Symbol offset	8
		}
if!(byte boundary){
		Padding Nibble	4	Padding to reach byte boundary.
}
		}

MBS-MAP message is used for notifying in given MBS ZONE, the concrete physical channel resources (shared OFDM symbol, employed subchannel) of connecting (Multicast CID) for concrete multicast to distribute, the position (Next MBS frame offset, NextMBS OFDMA Symbol offset) of employed modulation coding mode (DIUC), power bias (Boosting), next MBS traffic frame on given physical channel resources.As long as can correctly detect MBS-MAP message, the multicast that travelling carriage 300 just can obtain desired reception in view of the above connects the corresponding physical channel resource, employed modulation coding mode, power bias on given physical channel resources, comprise the position of the MBS traffic frame of this multicast connection in further definite next frame, thereby carry out the Data Receiving that normal multicast connects.

In MBS-MAP message, information word " DIUC (Downlink Interval Usage Code) " is one 4 bit-identify, be used for identifying current Burst (time slot) and go up employed modulation coding mode, forming mapping relations between itself and the concrete modulation coding mode, is an index that points to concrete modulation coding mode.Be positioned in DCD (Downlink ChannelDescriptor, the down channel descriptor) message that current area broadcasts about the concrete definition of DIUC value.Current area is periodically broadcasted DCD message, and uses " DCD count " to identify its variation in DCD message.

Subsequently, travelling carriage 300 is located real MBS professional shared physical channel resources and code modulation mode, thereby is gone to receive the MBS business according to the MBS service resources and the DIUC of the appointment of MBS_MAP message.

Travelling carriage 300 receives follow-up MBS business according to the professional residing position of MBS next time indicated in the MBS_MAP message simultaneously; After this no longer receive the DCD message comprise DL_MAP message etc., travelling carriage 300 is in Sleep (dormancy) and IDLE pattern to reach less electricity consumption.

There are some defectives in the receiving course of the MBS business of the prior art:

At first, when the different base station area of coverage of travelling carriage in MBS ZONE moves, can not guarantee the continuous reception of MBS business.Make a concrete analysis of as follows:

A) base station is provided by different manufacturers, and the mapping relations of defined DIUC and concrete code modulation mode are inconsistent in the DCD message of different manufacturers; Therefore when two the such base station coverage area of travelling carriage in same MBSZONE zone shift, travelling carriage is according to the DIUC that was engraved in the indicated MBS business of MBS_MAP message in the former base station last a period of time, in current base station, can not accurately locate the modulation coding mode of current base station reality, thereby can't decode;

B) mapping relations of defined DIUC of DCD message that supposes different manufacturers base station and concrete code modulation mode are consistent, be in the mapping relations that to change DIUC and concrete code modulation mode when different base station in the same MBS ZONE upgrades DCD message, (this is to be " down channel descriptor " because DCD describes and different base station is asynchronous when upgrading DCD message, itself to as if be confined in certain base station scope, so the renewal of DCD is independently controlled by each base station fully), cause travelling carriage only according to the DIUC of MBS_MAP message, the DIUC in the new base station and the mapping relations of modulation coding mode can not know for sure, and cause and to be correctly decoded, thereby can not guarantee the continuous reception of MBS business.

In addition, travelling carriage can't be at the effective grand diversity of MBS business realizing.

In the MBS business, realize under the situation of grand diversity, travelling carriage need receive the MBS business datum that two or more base stations issue simultaneously, being in the base station that in the same MBS ZONE all issue the MBS business is synchronous at the delivery time of MBS business, and employed physical channel resources should be consistent, as subchannel, the OFDMA symbol, code modulation mode etc., because the DCD updated time of different base station can not be synchronous, cause travelling carriage only according to the DIUC of MBS_MAP message, the DIUC in two different base stations and the mapping relations of definite code modulation mode can not know for sure, thereby can not adopt correct decoding process, can't realize grand diversity.

Summary of the invention

In order to overcome the above-mentioned defective of prior art, the technical problem that the present invention solves provides the method for receiving group broadcasting broadcast business data by mobile station in a kind of wireless network, can guarantee the continuous reception of MBS business when the different base station district of travelling carriage in same MBSZONE moves and the reliable realization of grand diversity.

For this reason, the technical scheme of technical solution problem of the present invention is: the method for receiving group broadcasting broadcast business data by mobile station in a kind of wireless network is provided, comprises step:

1) travelling carriage receives and the relevant down channel descriptor message of MBS business, obtains the call number of the modulation of current MBS business and coded system and the mapping relations between the concrete code modulation mode;

2) the MBS_MAP message among the described travelling carriage receiving multicast and broadcast service resource-area MBS ZONE, and resolve wherein information obtains that the call number and the corresponding MBS of employed modulation and coded system is connected shared physical channel resources among the MBS ZONE;

3) after described travelling carriage receives and upgrades with the professional relevant down channel descriptor message of MBS, obtain modulate and the call number of coded system and concrete code modulation mode between renewal after mapping relations;

4) described travelling carriage is according to described step 2) MBS of the correspondence obtained connects shared physical channel resources, receives the MBS business datum; Search mapping relations after the aforementioned renewal according to the call number of described modulation and coded system, obtain the modulation coding mode corresponding, this MBS business datum is resolved with this call number.

Preferably, described step 2) specifically comprise:

2A) base station periodic MBS_MAP message that sends in MBS ZONE, the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources;

2B) described travelling carriage receives the MBS_MAP message among the MBS ZONE, resolves information wherein, comprises that the call number MBS DIUC and the corresponding MBS of employed modulation and coded system is connected shared physical channel resources among the MBS ZONE.

Preferably, described step 2) specifically comprise:

2a) base station periodic MBS_MAP message that sends in MBS ZONE comprises in this message that employed modulation and the call number MBS DIUC of coded system, corresponding MBS are connected shared physical channel resources, indicate the information word MBS_DCD_Count of the down channel descriptor message of current association among the MBS ZONE;

2b) described travelling carriage receives the MBS_MAP message among the MBS ZONE, resolve information wherein, comprise employed modulation and the index MBS DIUC of coded system and the information word MBS_DCD_Count that corresponding MBS is connected the down channel descriptor message of shared physical channel resources, the current association of indication among the MBS ZONE.

Preferably, this method also comprises the renewal of down channel descriptor message relevant with the MBS business among the MBS server coordination MBS ZONE.

With respect to prior art, the invention has the beneficial effects as follows: because among the present invention, travelling carriage is after receiving MBS_MAP message, down channel descriptor message after further reception is upgraded is to obtain definite call number and the mapping relations between the modulation coding mode, and determine the modulation coding mode of the call number correspondence in the MBS_MAP message, thereby in MBS ZONE, guarantee the continuous reception of MBS business and the realization of grand diversity under the variable situation of the mapping relations between call number and the concrete modulation coding mode according to these mapping relations.

In addition, in a preferred version of the present invention, need not the message and the parameter of prior art are changed, just when receiving the MBS business, travelling carriage is after MBS ZONE receives MBS_MAP message constantly, and the DCD message that receives after upgrading just receives the MBS business again, when the different base station district of assurance travelling carriage in MBSZONE moves, the reliable realization of reception and grand diversity continuously, and can guarantee that the MBS business is variable at resource and code modulation mode that difference takies constantly.

In another preferred version of the present invention, need not existing down channel descriptor message is changed, but set up MBS_DCD message, in this MBS_DCD message, mapping relations may be upgraded in the MBS_DCD information updating, so travelling carriage is after MBS ZONE receives MBS_MAP message constantly, and the MBS_DCD message that receives after upgrading just receives the MBS business again, when guaranteeing that the different base station district of travelling carriage in MBS ZONE moves, the reliable realization of reception and grand diversity continuously.

In another preferred version of the present invention, need not equally existing down channel descriptor message is changed, but set up MBS_DCD message, in this MBS_DCD message, mapping relations may be upgraded in the MBS_DCD information updating, but the MBS_DCD message in the same MBS ZONE is by the MBS server controls, each base station is upgraded simultaneously, and in MBS_MAP message, increase MBSDCD Change Count information word, with the variation of tracking mapping relations, thereby guarantee the travelling carriage continuous reception of realization and grand diversity when the same MBS ZONE zone different base station area of coverage moves.

Description of drawings

Fig. 1 is a structural representation of realizing the mobile network system of MBS business;

Fig. 2 is the flow chart that MBS service lists information is obtained;

Fig. 3 is the flow chart that MBS service authentication and encryption key obtain;

Fig. 4 is the flow chart of the embodiment one of the inventive method;

Fig. 5 is the flow chart of the embodiment two of the inventive method;

Fig. 6 is the flow chart of the embodiment three of the inventive method;

Fig. 7 is the flow chart of the embodiment four of the inventive method;

Fig. 8 is the flow chart of the embodiment five of the inventive method;

Fig. 9 is the flow chart of the embodiment six of the inventive method;

Figure 10 is the flow chart of the embodiment seven of the inventive method.

Embodiment

Seeing also Fig. 4, is the flow chart of the embodiment of the invention one.

Step S11 sets up the DIUC (call number of modulation and coded system) of MBS business and the fixing mapping relations of code modulation mode in MBS ZONE.

For example, can on the basis of existing IEEE 802.16, set up MBS DIUC information word, and clearly provide the mapping relations of MBS DIUC and concrete modulation coding mode.A kind of optional mapping relations are as shown in table 2.

Table 2

MBS DIUC	Modulation coding mode
		0	BPSK 1/2
1	QPSK 1/2
		2	QPSK 3/4
3	16-QAM 1/2
		4	16-QAM 3/4
5	64-QAM 2/3
		6	64-QAM 3/4
7-15	Keep (Reserved)

That is to say, between the different base station district in the same MBS ZONE, set up the mapping relations of identical MBSDIUC and modulation coding mode.

And, the renewal of the DCD message that these mapping relations can not send because of the base station and changing, the DCD message in MBS DIUC and the MBS ZONE has nothing to do in other words.

Step S12 periodically sends message in MBS ZONE, the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources.

Described message can be the MBS MAP message that comprises MBS DIUC information word, and is as shown in table 3.

Table 3

Grammer (Syntax)	Length	Remarks
			MBS-MAP_Message_Format(){
Management Message Type=	8
			Frame number	24	Identical with the frame number among the DL-MAP
for(i=0;i<n;i++){
			Multicast CID	12	12LSB of CID for multicast
MBS DIUC	4	The modulation coding mode index
			OFDMA Symbol offset	8	With respect to MBS zone
Subchannel offset	6
			Boosting	3	Power bias
No.OFDMA Symbols	7
			No.Subchannels	6
Repetifion Coding Indication	2	Circulation decoding indication
			Next MBS frame offset	8	The position of next MBS traffic frame
Next MBS OFDMA Symbol offset	8
		}
if!(byte boundary){
		Padding Nibble	4	Padding to reach byte boundary.
}
		}

Step S13, travelling carriage receive this message and resolve information in this message, comprise that at least the index MBS DIUC and the corresponding MBS of employed modulation and coded system is connected shared physical channel resources among the MBSZONE.

Step S14, travelling carriage receives the MBS business datum according to described physical channel resources; Search aforementioned mapping relations according to described MBS DIUC, obtain the modulation coding mode corresponding, this MBS business datum is resolved with it.

Because the MBS DIUC of different base station is consistent with the mapping relations of modulation coding mode and fixing, travelling carriage is between the different base station area of coverage of same MBS ZONE when mobile, according to the MBS DIUC in the MBS MAP message, can obtain the modulation coding mode corresponding with it, the MBS business datum that receives is correctly decoded, thus the continuous reception and the grand diversity of realization MBS business.

The process that the travelling carriage that is appreciated that embodiment one receives the MBS business has nothing to do with the DCD message that the base station sends.This is because the mapping relations of MBS DIUC and modulation coding mode are determined, for the professional reception of MBS, need not consider DCD message, travelling carriage goes to receive MBS_MAP message at the MBSZONE resource-area in other words in the corresponding moment, the MBS DIUC and this MBS that analyze the MBS connection of correspondence indicated in the MBS_MAP message connect shared physical channel resources, can go to receive the MBS business, and mapping relations according to MBS DIUC and concrete code modulation mode, just can obtain the MBS that attitude will receive and connect employed concrete code modulation mode, and not spend the mapping relations of being set up in the DCD message that inquiry receives.

Seeing also Fig. 5, is the flow chart of the embodiment of the invention two.

Step S21 sets up the fixing mapping relations of the call number MBS DIUC and the code modulation mode of the modulation of MBS business and coded system in MBS ZONE.

Its specific implementation process is identical with embodiment one, and this does not give unnecessary details.

Step S22, travelling carriage in request MBS business, the DIUC of the MBS business that the MBS server is applied at upper-layer protocol (as HTTP) lining notice travelling carriage according to described mapping relations, and the shared physical channel resources of this MBS ZONE.

Step S23, in MBS ZONE, periodically send in the message, the call number MBS DIUC and the corresponding MBS that need not in this message to comprise employed modulation among the MBSZONE and coded system are connected shared physical channel resources, but should comprise that corresponding MBS connects the moment that next time arrives.

Described message can be MBS_MAP message as shown in table 4.

Table 4

Grammer (Syntax)	Length	Remarks
			MBS-MAP_Message_Format(){

Management Message Type=	8
			Frame number	24	Identical with the frame number among the DL-MAP
for(i=0;i<n;i++){
			Multicast CID	12	12LSB of CID for multicast
Next MBS frame offset	8	The position of next MBS traffic frame
			Next MBS OFDMA Symbol offset	8
}
		if!(byte boundary){
Padding Nibble	4				Padding to reach byte boundary.
		}
}

No longer change owing to belong to the code modulation mode of the MBS business in the same MBS ZONE and take physical resource, the call number MBS DIUC of employed modulation and coded system and corresponding MBS were connected shared physical channel resources during periodicity sent and no longer comprises MBSZONE in the specific message in MBS ZONE.

Step S24, travelling carriage receives specific message MBS_MAP among the MBS ZONE, analyzes and record information wherein, and the information of record comprises that corresponding M BS connects the time information that next time arrives.

Step S25, travelling carriage receive the MBS business datum in the place of correspondence, and obtain modulation coding mode according to MBS DIUC and aforementioned mapping relations in conjunction with the information and the physical channel resources of above-mentioned record, and the MBS business datum is resolved.

Because the MBS DIUC of different base station is consistent with the mapping relations of modulation coding mode and fixing, and by MBS server notification MBS DIUC, when between the different base station area of coverage of travelling carriage at same MBS ZONE when mobile, according to this MBS DIUC, can obtain the modulation coding mode corresponding with it, the MBS business datum that receives is correctly decoded, thereby assurance realizes the continuous reception and the grand diversity of MBS business.

Seeing also Fig. 6, is the flow chart of third embodiment of the invention.

Step S31, MBS ZONE generate DCD message, comprise the fixing mapping relations between DIUC and the concrete code modulation mode in this DCD message.

That is to say that the mapping relations of DIUC and concrete code modulation mode in the clear and definite DCD message make the mapping relations that have consistent DIUC and concrete code modulation mode between the equipment of different manufacturers; And in the DCD information updating, do not upgrade these mapping relations, only upgrade the pairing content in other territories in the DCD message, as parameters such as frequency resource or transmitting powers according to actual conditions.

Step S32, travelling carriage receive DCD message in MBS ZONE, obtain the fixing mapping relations between DIUC and the concrete code modulation mode.

Step S33, the specific message of periodic transmission in MBS ZONE, the call number DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources.

Step S34, travelling carriage receives specific message (as MBS MAP) among the MBS ZONE, analyze and record information wherein, the information of record comprises at least the index of employed modulation among the MBS ZONE and coded system and corresponding MBS is connected shared physical channel resources.

Step S35, travelling carriage utilize the information of above-mentioned record, and analyze other fields, and this analysis result is used for the MBS business datum and receives.Specifically: travelling carriage receives the MBS business datum according to described physical channel resources; Search aforementioned mapping relations according to described DIUC, obtain the modulation coding mode corresponding, this MBS business datum is resolved with it.

Because the DIUC in the DCD message and the mapping relations of modulation coding mode are fixed, so when continuous reception that realizes the MBS business and grand diversity, the asynchronous decoding that does not influence the MBS business datum of the DCD information updating of different base station.That is to say that travelling carriage is as long as just can know the DIUC of MBS business by deciphering MBS_MAP message, and the pairing concrete code modulation mode of DIUC is the same under different base stations.

Need to prove that in the present embodiment, travelling carriage can use different code modulation modes at the MBS business after transferring to the another one base station from a base station in the same MBS ZONE.Key is that mapping relations are changeless.

Seeing also Fig. 7, is the flow chart of fourth embodiment of the invention.

Step S41 before travelling carriage receives the MBS business, may receive DCD message sometime after registration MBS business.Travelling carriage receives the mapping relations that DCD message just can be obtained current DIUC and concrete code modulation mode.

Step S42, the base station is the specific MBS_MAP message of periodic transmission in MBS ZONE, and the call number DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources.

Step S43, travelling carriage receives specific MBS_MAP message among the MBS ZONE, analyze and record information wherein, the information of record comprises at least the index of employed modulation among the MBS ZONE and coded system and corresponding MBS is connected shared physical channel resources.

Step S44, travelling carriage judge whether to receive new MBS_DCD message, if then enter step S45; If not, then wait for the DCD message that reception is new.

This be because, though travelling carriage can parse the DIUC of current MBS business after receiving MBS_MAP message, but because the travelling carriage that is under the IDLE pattern may be crossed over different base station overlay areas in moving process, also do not know DIUC in the DCD message in the present base station area of coverage and the mapping relations of concrete code modulation mode this moment.Therefore be the normal reception of assurance MBS business and the realization of grand diversity, travelling carriage must be waited for and receiving after the new DCD message, the concrete code modulation mode of current indicated DIUC correspondence that just can know for sure, thus go to finish the reception of MBS business datum.

Step S45 writes down the information among the above-mentioned MBS_MAP, and analyzes other fields, and analysis result is used for the MBS business datum and receives.Specifically: travelling carriage receives the MBS business datum according to described physical channel resources; Search mapping relations in the DCD message according to described DIUC, obtain the modulation coding mode corresponding, this MBS business datum is resolved with it.

In the present embodiment, owing to keep the implication of current existing DCD message in the agreement, do not do any requirement, this moment is with regard to the inconsistent problem of mapping relations of DIUC in the DCD message that has distinct device provider and concrete code modulation mode, even and the equipment of same manufacturer difference constantly DCD also may upgrade its mapping relations when upgrading.If this moment, travelling carriage was in the IDLE pattern, may not know the definite information of the base station overlay area of present MBS ZONE of living in, therefore require travelling carriage constantly, receive and to receive the MBS business after MBS_MAP message must receive later DCD message at MBSZONE.

Seeing also Fig. 8, is the flow chart of fifth embodiment of the invention.

Step S51 before travelling carriage receives the MBS business (may after registration MBS business), receiving and is resolving MBS_DCD message sometime, therefrom obtains the mapping relations of MBS DIUC and concrete code modulation mode.No longer change after these mapping relations.

That is to say that at the professional MBS_DCD message that generates of MBS, in this MBS_DCD message, mapping relations are fixed, can be not different because equipment is provided by different manufacturers; And in the MBS_DCD information updating, can not upgrade these mapping relations.

As shown in table 5, be a kind of execution mode of this MBS_DCD message.

Table 5

Grammer (Syntax)	Length	Remarks
			MBS_DCD_Message_Format(){
Management Message Type=	8
			Begin PHY Specific Section{		See applicable PHY section
for(i=1;i<=n;i++){		For each downlink burst profile 1 to n
			MBS DIUC	4
Modulation and FEC Code Type	8
			}
}
			}

Wherein, the definition of " Modulation and FEC Code Type " is referring to the 11.4.2 joint of IEEE802.16-2004.

Step S52, the base station is the specific MBS_MAP message of periodic transmission in MBS ZONE, and the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources.

Step S53, travelling carriage receives specific MBS_MAP message among the MBS ZONE, analyze and record information wherein, the information of record comprises at least the index of employed modulation among the MBS ZONE and coded system and corresponding MBS is connected shared physical channel resources.

Step S54, travelling carriage utilize the information of above-mentioned record, and analyze other fields, and this analysis result is used for the MBS business datum and receives.Specifically can be: travelling carriage receives the MBS business datum according to described physical channel resources; Search aforementioned mapping relations according to described MBS DIUC, obtain the modulation coding mode corresponding, this MBS business datum is resolved with it.

Because the MBS DIUC in the MBS DCD message and the mapping relations of modulation coding mode are fixed, the pairing concrete code modulation mode of this MBS DIUC is the same under different base stations, therefore when continuous reception that realizes the MBS business and grand diversity, the MBS_DCD information updating of different base station is asynchronous, and also it doesn't matter, travelling carriage needs only by decoding MBS_MAP message just knows the DIUC of MBS business, and obtains corresponding modulation coding mode.

Need to prove that in the present embodiment, travelling carriage can use different code modulation modes at the MBS business after transferring to the another one base station from a base station in the same MBS ZONE.

In the present embodiment, no matter the renewal of MBS_DCD message is finished the enforcement that does not influence scheme by base station side or by a concentrated MBS server.

Seeing also Fig. 9, is the flow chart of the embodiment of the invention six.

Step S61 before travelling carriage receives the MBS business, may receive and resolve MBS_DCD message sometime after registration MBS business, therefrom obtain the mapping relations of current MBS DIUC and concrete code modulation mode.

A kind of execution mode of this MBS DCD message can be with reference to table 6.

Table 6

Grammer (Syntax)	Length	Remarks
			MBS_DCD_Message_Format(){
Management Message Type=	8
			MBS_DCD Change Count	8
Begin PHY Specific Section{		See applicable PHY section
			for(i=1;i<=n;i++){		For each downlink burst profile 1 to n
MBS DIUC	4
			Modulation and FEC Code Type	8
}
			}
}

Wherein, the definition of " Modulation and FEC Code Type " is referring to the 11.4.2 joint of IEEE802.16-2004.

By the renewal of the unified control of MBS server MBS_DCD message, guarantee that all base stations in the MBS ZONE are upgraded simultaneously.These mapping relations may change in the MBS_DCD information updating, are undertaken by revising MBS_DCD Change Count.

Step S62, the base station is the specific MBS_MAP message of periodic transmission in MBS ZONE, the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources, and simultaneously by the current associated MBS_DCD message of MBS DIUC of MBS_DCD_Count indication.

A kind of execution mode of this MBS_MAP message can be with reference to table 7.

Table 7

Grammer (Syntax)	Length	Remarks
			MBS-MAP_Message_Format(){
Management Message Type=	8
			Frame number	24	Identical with the frame number among the DL-MAP
for(i=0;i<n;i++){
			Multicast CID	12	12LSB of CID for multicast
MBS DCD Count	8
			MBS DIUC	4	The modulation coding mode index
OFDMA Symbol offset	8	With respect to MBS zone
			Subchannel offset	6
Boosting	3	Power bias
			No.OFDMA Symbols	7
No.Subchannels	6
			Repetition Coding Indication	2	Circulation decoding indication
Next MBS frame offset	8	The position of next MBS traffic frame
			Next MBS OFDMA Symbol offset	8
}
			if!(byte boundary){
Padding Nibble	4	Padding to reach byte boundary.
			}
}

Step S63, travelling carriage receives specific MBS_MAP message among the MBS ZONE, analyze and record information wherein, the information of record comprises that at least index DIUC and corresponding MBS to employed modulation among the MBS ZONE and coded system are connected shared physical channel resources, also comprises the MBS_DCD message indication MBS_DCD Count that current MBS_MAP message is associated.

Step S64, travelling carriage judge whether the associated MBS_DCD count of current MBS_MAP message is consistent with the MBS_DCD Change Count in the MBS_DCD message that once received, if then enter step S66; If not, then change step S65 over to.

Step S65 receives new MBS_DCD message, so that obtain the mapping relations of current MBS DIUC and concrete code modulation mode, and enters step S66.

Step S66, travelling carriage utilize the information of above-mentioned record, and analyze other fields, and this analysis result is used for the MBS business datum and receives.

In a word, present embodiment is not done any constraint to existing DCD message, but generates MBS_DCD message, in this MBS_DCD message, mapping relations may be upgraded in the MBS_DCD information updating, but because the MBS_DCD message in the same MBS ZONE is controlled by MBS Server, upgrade simultaneously; And in MBS_MAP message, increase MBS DCD Count information word,, can guarantee that therefore travelling carriage realization when the same MBS ZONE zone different base station area of coverage moves receives and grand diversity continuously to follow the tracks of the variation of these mapping relations.

Seeing also Figure 10, is the flow chart of the embodiment of the invention seven.

Step S71 before travelling carriage receives the MBS business, may receive MBS_DCD message sometime after registration MBS business.Travelling carriage receives the mapping relations that MBS_DCD message just can be obtained current MBS DIUC and concrete code modulation mode.

The form of the message among the form of this MBS_DCD message and the embodiment six is identical, and this does not give unnecessary details.

Step S72, the base station is the specific MBS_MAP message of periodic transmission in MBS ZONE, and the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources.

Step S73, travelling carriage receives specific MBS_MAP message among the MBS ZONE, analyze and record information wherein, the information of record comprises at least the index of employed modulation among the MBS ZONE and coded system and corresponding MBS is connected shared physical channel resources.

Step S74, travelling carriage judge whether to receive new MBS_DCD message, if then enter step S75; If not, then wait for the MBS_DCD message that reception is new.

This be because, though travelling carriage can parse the MBS DIUC of current MBS business after receiving MBS_MAP message, but because the travelling carriage that is under the IDLE pattern may be crossed over different base station overlay areas in moving process, also do not know MBS DIUC in the MBS_DCD message in the present base station area of coverage and the mapping relations of concrete code modulation mode this moment.Therefore travelling carriage must be waited for and receiving after the new MBS_DCD message, could normally receive the MBS business.

Step S75 writes down the information among the above-mentioned MBS_MAP, and analyzes other fields, and analysis result is used for the MBS business datum and receives.

In a word, in the present embodiment, existing DCD message is not done any constraint, but generate MBSD_CD message, and in this MBS_DCD message, mapping relations may be upgraded in the MBS_DCD information updating, but the MBS_DCD message in the same MBS ZONE is by base stations control, can not guarantee to upgrade simultaneously.Realize receiving continuously and grand diversity when the same MBS ZONE zone different base station area of coverage moves for guaranteeing travelling carriage, need travelling carriage this moment after receiving MBS_MAP message in the MBS ZONE, must receive MBS DCD message, just normally receive the MBS business.

In sum, in the embodiments of the invention one, two, three and five, in MBS ZONE, set up fixing mapping relations between call number and the concrete modulation coding mode, that is to say, all base station overlay areas adopt identical mapping relations, therefore when travelling carriage is mobile between the different base station of same MBS ZONE, can obtain definite modulation coding mode, can guarantee the continuous reception and the grand diversity of MBS business effectively according to the call number in the MBS MAP message.

In the embodiments of the invention four, six and seven, mapping relations in MBS ZONE between call number and the concrete modulation coding mode are variable, therefore, travelling carriage is after receiving MBS MAP message, further receive the down channel descriptor message after upgrading, obtaining definite call number and the mapping relations between the modulation coding mode, thereby guarantee the continuous reception of MBS business and the realization of grand diversity.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. the method for receiving group broadcasting broadcast business data by mobile station in the wireless network is characterized in that, comprises step:

1) travelling carriage receives and the relevant down channel descriptor message of MBS business, obtains the call number of the modulation of current MBS business and coded system and the mapping relations between the concrete code modulation mode;

2) the MBS_MAP message among the described travelling carriage receiving multicast and broadcast service resource-area MBS ZONE, and resolve wherein information obtains that the call number and the corresponding MBS of employed modulation and coded system is connected shared physical channel resources among the MBS ZONE;

3) after described travelling carriage receives and upgrades with the professional relevant down channel descriptor message of MBS, obtain modulate and the call number of coded system and concrete code modulation mode between renewal after mapping relations;

4) described travelling carriage is according to described step 2) MBS of the correspondence obtained connects shared physical channel resources, receives the MBS business datum; Search mapping relations after the aforementioned renewal according to the call number of described modulation and coded system, obtain the modulation coding mode corresponding, this MBS business datum is resolved with this call number.

2. the method for receiving group broadcasting broadcast business data by mobile station is characterized in that in the wireless network according to claim 1, described step 2) specifically comprise:

2A) base station periodic MBS_MAP message that sends in MBS ZONE, the call number MBS DIUC and the corresponding MBS that comprise in this message employed modulation among the MBS ZONE and coded system are connected shared physical channel resources;

2B) described travelling carriage receives the MBS_MAP message among the MBS ZONE, resolves information wherein, comprises that the call number MBS DIUC and the corresponding MBS of employed modulation and coded system is connected shared physical channel resources among the MBS ZONE.

3. the method for receiving group broadcasting broadcast business data by mobile station is characterized in that in the wireless network according to claim 1, described step 2) specifically comprise:

2a) base station periodic MBS_MAP message that sends in MBS ZONE comprises in this message that employed modulation and the call number MBS DIUC of coded system, corresponding MBS are connected shared physical channel resources, indicate the information word MBS_DCD_Count of the down channel descriptor message of current association among the MBS ZONE;

2b) described travelling carriage receives the MBS_MAP message among the MBS ZONE, resolve information wherein, comprise employed modulation and the index MBS DIUC of coded system and the information word MBS_DCD_Count that corresponding MBS is connected the down channel descriptor message of shared physical channel resources, the current association of indication among the MBS ZONE.

4. the method for receiving group broadcasting broadcast business data by mobile station is characterized in that in the wireless network according to claim 3, also comprises the renewal of down channel descriptor message relevant with the MBS business among the MBS server coordination MBS ZONE.

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