CN101166145A

CN101166145A - Downlink transmission method and system for multicast broadcast service

Info

Publication number: CN101166145A
Application number: CNA2006101426011A
Authority: CN
Inventors: 梁文亮; 吴建军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-10-18
Filing date: 2006-10-18
Publication date: 2008-04-23
Anticipated expiration: 2026-10-18
Also published as: WO2008049369A1; CN101166145B

Abstract

The method and system make terminal possible to receive pointed MBS service from aerial port. In the invention, through SFID, tunnel ID, IP stream ID or logic channel ID in tunnel, base station distinguishes different MBS services from MBS server as well as sends each MBS service through different channels to terminals. Logic channel ID can be added to head of MAC PDU. Independent physical resources can be configured for each logic channel.

Description

Multimedia Broadcast Multicast Service downlink transmission method and system thereof

Technical field

The present invention relates to wireless communication field, particularly Multimedia Broadcast Multicast Service (Multicast BroadcastService is called for short " MBS ") technology.

Background technology

Along with the growth of development of Communication Technique and user's request, data service has obtained developing rapidly, and the increasing rapidly of data business volume makes people grow to even greater heights to the demand of communication bandwidth, and broadband access shows a huge market to industrial circle.For breaking through the bandwidth bottleneck of Access Network, people have released multiple broadband access technology.

IEEE802.16 is (the Institute of Electrical andElectronics Engineers of Institute of Electrical and Electronics Engineers, be called for short " IEEE ") in promulgation in December calendar year 2001, the standard that provides last kilometer WiMAX to insert at metropolitan area network is provided.

Micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access, be called for short " WiMAX ") be that present industry is to the wireless MAN access technology based on IEEE 802.16 series standards, its elementary object provides a kind of under some multivendor environment to multiple spot of metropolitan area network, effectively the broadband wireless access means of interoperability.

Specifically, 802.16 series standards have been stipulated the air interface part protocol layer of WiMAX system, mainly comprise physical layer (PHY), and medium access control (Medium Access Control is called for short " MAC ") layer.Wherein, the PHY layer is finished physically to operations such as the modulation of signal and encoding and decoding, and the MAC layer is mainly finished the medium access control function of WiMAX system.

Fig. 1 illustrates the end-to-end reference model of WiMAX.Wherein the R1 interface is a wireless air interface, is mainly defined by IEEE802.16d/e.All the other interfaces are wireline interface.

As can be seen, WiMAX mainly comprises travelling carriage (Mobile Station, be called for short " MS ")/subscriber station (Subscribe Station, abbreviation " SS "), access service network (Access ServiceNetwork, be called for short " ASN ") and connectivity serving network (Connectivity Service Network is called for short " CSN ").

ASN is defined as the network function set that the wireless access service is provided for the WiMAX user terminal, and ASN has comprised BS and ASN gateway (ASN GateWay is called for short " ASN-GW ") network element, and an ASN may be shared by a plurality of CSN.

The major function of ASN comprises the function of BS and the function of ASN-GW.Wherein, the function of BS has: provide that BS is connected with the L2 of subscriber station SS/MS, the compression and the encryption of RRM, measurement and the power control and the data of eating dishes without rice or wine.The function of ASN-GW has: for SS/MS authentication, mandate, billing function provide agency (proxy) function; Support the network of NSP to find and selection; For SS provides relaying (Relay) function of L3 information, as IP address assignment.

CSN is defined as to the WiMAX user terminal IP is provided Connection Service.CSN mainly provides the IP address assignment of following function: SS/MS, Internet inserts, authentication, mandate, charging protocol (Authentication, Authorization, Account, be called for short " AAA ") agency (proxy) or service (server), authorization control based on the user, ASN is to the tunnel of CSN, WiMAX user's charging and the clearing between the operator, tunnel under the roaming condition between the CSN, switching between the ASN and various WiMAX service (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business).

MS/SS is (moving) terminal, and the user uses this terminal to insert the WiMAX network.

More than WiMAX and network architecture thereof are illustrated, below MBS is simply introduced.

Fast development along with Internet (internet), people no longer are satisfied with phone and messaging service to the demand of mobile communication, a large amount of multimedia services emerge, the some of them applied business requires a plurality of users can receive identical data simultaneously, as video request program, television broadcasting, video conference, online education, interactive game etc.On cable network, can adopt internetworking agreement (Internet Protocol at present, abbreviation " IP ") multicast and broadcast technology realize, but these business are transplanted on the mobile network, compare with general data, characteristics such as data volume is big because these business have, longer duration, delay sensitive, and mobile network has particular network structure, functional entity and wave point etc., and existing ip multicast and broadcast technology can not be directly applied for mobile network.

In order to effectively utilize mobile network resource, WiMAX has defined the MBS business, and the MBS business is that the point-to-multipoint service of a data source to a plurality of users send data is provided in the mobile network, realizes that Internet resources are shared, improve utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.The MBS of WiMAX definition 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, and this has complied with the trend of following mobile data development undoubtedly.

In the WiMAX network, by service flow sign (Service Flow Identifier, be called for short " SFID "), identify different one directional service stream, identify different connections by CID, all service flow transmit in the connection of eating dishes without rice or wine by media interviews control (Medium Access Control is called for short " MAC ") layer, by shining upon, service flow is transmitted in the connection of correspondence between the SFID of service flow and the CID that the MAC layer is connected.Based on WiMAX network MBS business on the basis of above-mentioned sign, also identifying multicast specially by multicast connection identifiers (Multicast CID) connects, identify a multicast service by multicast content sign (MBS Contents ID), a MulicastCID goes up the protocol Data Unit (Protocol Data Unit is called for short " PDU ") that transmits and can comprise one or more MBS business.

In the MBS business, the service flow of some whole world definition can be carried to the broadcast or multicast information of a plurality of terminals, these service flow comprise service quality (Quality of Service, be called for short " QoS ") parameter, in order to improve service security, can encrypt it with the data encryption key of whole world definition.

Two kinds of access modules of MBS business support based on the WiMAX network: single base station is inserted and many base stations are inserted.Under the access module of many base stations, having defined the MBS territory (is MBS Zone, identify with MBS_zoneID) notion, so-called set that the MBS territory is exactly a base station, all base stations in MBS territory are with identical multicast connection identifiers (Multicast CID, be called for short " MCID ") and MBS group Security Association (MBS Group Security Association, be called for short " MBS GSA "), send the content of same MBS service flow, the terminal of having registered the MBS service can receive the MBS business datum by a plurality of base stations in this MBS territory, and when the terminal that is in Idle state moves in interior span base station, MBS territory, need not rebuild connection, can impregnable reception MBS business, realize the seamless switching of MBS business.It is a kind of special case that MBS are inserted in many base stations that MBS is inserted in single base station, and MBS territory scope is defined as in the base station range, and all users of this MBS of reception use same multicast connection identifiers in MBS territory.Prior art does not have detailed description to single base station mode, but under many base station modes, and how the base station sends the MBS data, and how terminal receives the MBS data, and how the base station to notify the transmission of the interested MBS data of terminal, and corresponding description is all arranged.

That eats dishes without rice or wine in the existing system mainly is described below:

At first, the DL-MAP that broadcasting connection identifier (broadcasting CID) is gone up broadcasting comprises zero to one or more MBS-MAP-IE, MBS-MAP-IE last each with MBS territory ID as sign;

The second, one MBS-MAP-IE sign eats dishes without rice or wine to go up the physical resource of a MBS-MAP message of broadcasting; If single base station mode is then directly indicated the physical resource of MBS business;

The three, one MBS-MAP message can comprise zero MBS-DATA-IE to one or more MBS-DATA-IE or expansion, the physical parameter between these MBS-DATA-IE can unanimity also can be inconsistent, determine by network side; But a MBS-DATA-IE only has only a physical parameter collection;

Comprise one or more multicasts CID among the four, one MBS-DATA-IE; Why requiring a MBS-DATA-IE to comprise one is for the consideration that reduces the MBS-MAP message-length to a plurality of multicast CID, and pairing multicast CID indicates in a MBS-DATA-IE the MBS data of identical DIUC.On transfer of data, exactly the identical MAC PDU of DIUC is placed on a physical resource burst (Burst) and goes up transmission, though the data of different MBS services have mixed in Burst, can on the MAC layer, distinguish by the multicast CID on the MAC PDU head.Not every multicast CID is corresponding to same MBS business, but each multicast CID is corresponding to a MBS business.

Among the five, one the expansion MBS-DATA-IE, a multicast CID also comprises one or more logic channels ID.Use during logic channel ID eats dishes without rice or wine, be used for informing whether the MBS data of the current indication of terminal have its interested content;

In addition, DCD is last can carry zero to one or more MBS territory ID.According to the regulation of agreement 802.16e to content identification Content ID: this group information of Content ID and multicast CID and logic channel ID is corresponding one by one.Content ID is the upper layer data stream that is used for identifying WiMAX Access Network service flow (SF) carrying.

DL-MAP message indicates the physical resource that next MBS-MAP message sends, but does not distinguish multicast CID and the logic channel ID that comprises in the MBS-MAP message; Indication to next MBS-MAP message physical resource is also arranged among the MBS-DATA-IE, be different with the indication among the DL-MAP, the MBS-MAP message here is a special MBS-MAP message, wherein necessarily comprises a MBS-DATA-IE and has multicast CID and the logic channel ID consistent with current MBS-DATA-IE.Like this, terminal just need not to receive one by one DL-MAP message, only needs just can know from current MBS-MAP-IE the delivery time of the next MBS-MAP message of being concerned about.

In addition, also have one among the MBS-DATA-IE and change indication,, just directly receive the MBS data if do not change; Otherwise need to resolve new MBS-DATA-IE, with the relevant MBS information of new terminal more.

More than be the main description of existing protocol, describe that prior art is not carried under a plurality of ip multicast stream situations the description how Access Network is distinguished to terminal to the base station about an ASN service flow in conjunction with above-mentioned eating dishes without rice or wine to eating dishes without rice or wine in the MBS system.

Summary of the invention

The technical problem underlying that the embodiment of the invention will solve provides a kind of Multimedia Broadcast Multicast Service downlink transmission method and system thereof, makes terminal can receive the MBS business of appointment from eating dishes without rice or wine.

The invention provides a kind of Multimedia Broadcast Multicast Service downlink transmission method, comprise following steps:

Multimedia Broadcast Multicast Service MBS server sends to access service network gateway with the MBS service bearer in IP stream;

Each IP stream that described access service network gateway will be received is carried on and sends to the base station in the service flow;

Described base station is carried on each the MBS business in the service flow of receiving respectively in the logic channel of eating dishes without rice or wine to connect and sends to terminal.

The present invention also provides a kind of method to set up of Logic Channel Identifier, comprises following steps, at MAC layer data bag new field, described Logic Channel Identifier is set.

The present invention also provides a kind of base station to send the method for Multimedia Broadcast Multicast Service, comprises following steps:

Eat dishes without rice or wine to connect each the logical channel assignment separated physical resource that comprises for same, and notify terminal the corresponding relation of described logic channel and its physical resource;

The MAC PDU that forms is flowed with the professional different IP of same MBS in the base station, is carried in the Different Logic channel corresponding physical resource to send to terminal.

The present invention also provides a kind of Multimedia Broadcast Multicast Service descending transmitting system, comprise MBS server, at least one access service network gateway/MBS agency and base station, described MBS server also comprises the MBS server service transmission unit that is used for the MBS service bearer is sent at IP stream described access service network gateway;

Described access service network gateway also comprises and is used for each the IP stream from the MBS server is carried on the professional transmission unit of access service network gateway that service flow sends to described base station;

Described base station also comprises and is used for each the MBS business from the service flow of described access service network gateway is carried on the BTS service transmission unit that sends to terminal in the logic channel of eating dishes without rice or wine to connect respectively.

The present invention also provides a kind of base station, comprises:

Resource distribution module is used to same each the logical channel assignment separated physical resource that comprises of eating dishes without rice or wine to connect, and notifies terminal with the corresponding relation of described logic channel and its physical resource;

Sending module is used for the MAC PDU with the formation of the professional different IP stream of same MBS, is carried in the Different Logic channel corresponding physical resource to send to terminal.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream, the ASN gateway is the different SFID of each IP flow distribution that is received, corresponding to different service flow, each service flow is arrived the base station by different tunnel transmission respectively, the base station is that each service flow of being received is distributed different MCID respectively, different service flow is carried on different eating dishes without rice or wine to be sent to terminal in the connection, make in the process of the professional transmission of different MBS, can be distinguished mutually, as when the base station, by MBS business of MCID unique identification, make the MBS business that the base station can the required reception of unique definite terminal, indicating terminal connects this MBS business of reception from eating dishes without rice or wine accordingly; Or, identical MCID can also identical service flow be distributed for the qos parameter of same MBS business in the base station, and each service flow is carried in the same Different Logic channel of eating dishes without rice or wine to connect sends to terminal, can pass through Logic Channel Identifier (LogicalChannel ID equally, abbreviation " LCID ") the MBS business of the required reception of unique definite terminal, indicating terminal receives this MBS business from corresponding logic channel.

Perhaps, the ASN gateway is the identical identical SFID of IP flow distribution of the qos parameter of same MBS business, these IP streams are carried in the identical service flow by different tunnel transmission to the base station, the base station can be flowed according to the different IP of the tunnel identification that receives, in addition, the base station equally can be for the qos parameter of same MBS business the identical identical MCID of IP flow distribution, will be carried on from the service flow in different tunnels in the same Different Logic channel of eating dishes without rice or wine to connect and send to terminal.Can reach the effect of unique identification MBS business equally by LCID, make terminal can receive the MBS business of appointment according to the actual requirements.

Perhaps, the ASN gateway can pass through the tunnel transmission of base station granularity to the base station with each IP stream of being received, carry out identification and differentiation by the base station, be the identical identical MCID of IP flow distribution of the qos parameter of same MBS business, these IP circulation be changed to MAC PDU be carried in the same Different Logic channel of eating dishes without rice or wine to connect and send to terminal.

Perhaps, the ASN gateway is after receiving IP stream, be the identical identical SFID of IP flow distribution of the qos parameter of same MBS business, and convert thereof into MAC layer data bag by the Type-2 tunnel style, these MAC layer data bags are carried in the same service flow by different tunnel transmission to the base station, be converted into MAC PDU by the base station and be transferred to terminal by different logic channels, make terminal just to tell this PDU and whether comprise own interested MBS business, simplified the operation of terminal at the MAC layer.

Perhaps, the ASN gateway is after changing the IP circulation into MAC PDU, add LCID in its packet header, which kind of no matter by mode transmit afterwards, the base station all can unique definite MBS business, and, make interested terminal receive this MBS business from corresponding logic channel by the corresponding MAC PDU of logic channel transmission that LCID indicates.

Can LCID be set by three kinds of modes: directly in the newly-increased LCID field of MAC PDU; Or the indication whether this LCID field is arranged is set in MAC PDU, and be designated as when comprising the LCID field at this, add LCID, this method flexibility is higher, when not needing LCID is set, can not transmit the LCID field, has improved the utilance of resource; Or be the sub-head type of the newly-increased expansion of MAC PDU, at the sub-head of the expansion of newly-increased type LCID is set.

The base station can be each logical channel assignment separated physical resource, MAC PDU in the physical resource transmission counterlogic channel that passes through to be distributed, and indicating terminal obtains the packet of required MAC business from LCID corresponding physical resource, makes terminal can distinguish in physical layer whether the current MAC PDU that receives comprises own required MBS business datum.

Description of drawings

Fig. 1 is a WiMAX schematic network structure in the prior art;

Fig. 2 is according to the professional downlink transmission method flow chart of the MBS of first embodiment of the invention;

Fig. 3 is according to the professional downlink transmission method flow chart of the MBS of second embodiment of the invention;

Fig. 4 is according to the professional downlink transmission method flow chart of the MBS of third embodiment of the invention;

Fig. 5 is according to the professional downlink transmission method flow chart of the MBS of four embodiment of the invention;

Fig. 6 is according to the professional downlink transmission method flow chart of the MBS of fifth embodiment of the invention;

Fig. 7 is according to the professional downlink transmission method flow chart of the MBS of sixth embodiment of the invention;

Fig. 8 is according to the schematic diagram that increases LCID in the professional downlink transmission method of the MBS of sixth embodiment of the invention by method 1 at the MAC pdu header newly;

Fig. 9 is according to the schematic diagram that increases LCID in the professional downlink transmission method of the MBS of sixth embodiment of the invention by method 2 at the MAC pdu header newly;

Figure 10 is according to the schematic diagram of expanding the son head in the professional downlink transmission method of the MBS of sixth embodiment of the invention by method 3 at the newly-increased LCID of MAC pdu header.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

In the present invention, by with different MBS service bearers in different IP stream, and distinguish these MBS business by different SFID and/or transmission R6 tunnel and/or MCID and/or LCID, make that the base station can MBS business of unique indication, terminal can be according to the indication of base station, in the own interested MBS business of connection reception of appointment.

Below first embodiment of the invention is described, first embodiment of the invention relates to the professional downlink transmission method of MBS.

As shown in Figure 2, in step 201, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 202, the ASN gateway is the different SFID of each IP flow distribution that is received, corresponding to different service flow, each service flow is arrived the base station by different R6 tunnel transmission respectively.

Then enter step 203, after IP stream is received in the base station,, the packet on the different service flow is converted to MAC PDU is carried on different eating dishes without rice or wine (being air interface) and sends to terminal in connecting for each service flow of being received is distributed different MCID respectively.Can add this business to base station requests to the professional interested terminal of this MBS, obtain this professional information such as MCID, from this MBS business of reception of eating dishes without rice or wine to connect of MCID sign.

Second embodiment of the invention relates to the professional downlink transmission method of MBS, and the present embodiment and first execution mode are roughly the same, and its difference is that in the first embodiment, the base station is that different service flow is distributed different MCID; But in the present embodiment, in order to utilize the MCID resource more efficiently, can distribute identical MCID for the service flow of the identical qos parameter of same MBS business (QoS of MBS business that is these service flow correspondences is identical), carry different IP stream by different logic channels.

Specifically as shown in Figure 3, in step 301, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 302, the ASN gateway is the different SFID of each IP flow distribution that is received, corresponding to different service flow, each service flow is arrived the base station by different R6 tunnel transmission respectively.In this step, the ASN gateway can also be informed the base station to the corresponding relation of content identification that is used for unique identification MBS business (Content-ID) and SFID, makes the base station can determine the MBS business of each service flow correspondence.

Then enter step 303, the base station is that the service flow of corresponding different MBS services is distributed MCID, the identical service flow of qos parameter that is same MBS business is distributed identical MCID, and the packet on the different service flow that the qos parameter of same MBS business is identical is converted to MAC PDU and is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal.Different MBS business can be distinguished by LCID with terminal in the base station, makes terminal when certain MBS of request is professional, and the base station can receive this MBS business by issuing the LCID indicating terminal in the appointment logic channel that appointment eats dishes without rice or wine to connect.

Third embodiment of the invention relates to the professional downlink transmission method of MBS, and the present embodiment and second execution mode are roughly the same, and its difference is that in second execution mode, ASN is the different different SFID of IP flow distribution, the service flow that it is corresponding different; And in the present embodiment, ASN is the identical SFID of IP flow distribution of the identical qos parameter of same MBS business, by different R6 tunnels it is transferred to the base station.

As shown in Figure 4, in step 401, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 402, the ASN gateway is each the IP flow distribution SFID that is received, be the identical service flow sign of the identical IP flow distribution of the qos parameter of same MBS business, the different IP stream that the qos parameter of same MBS business is identical arrives the base station by the different R6 tunnel transmission of same service flow.In this step, the ASN gateway can also be informed the base station to the corresponding relation in content identification that is used for unique identification MBS business and transmission R6 tunnel, makes the base station can determine the pairing MBS business of service flow in each R6 tunnel.

Then enter step 403, the base station is that the service flow received is distributed MCID, is carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal being converted to MAC PDU from the content in different R6 tunnel in the same service flow.Because different MBS business can be distinguished by LCID with terminal in the base station, make terminal when certain MBS of request is professional, the base station can be by issuing LCID, and indicating terminal receives this MBS business in the counterlogic channel that appointment eats dishes without rice or wine to connect.

Four embodiment of the invention relates to the professional downlink transmission method of MBS, the difference of present embodiment and the 3rd execution mode is, in the 3rd execution mode, ASN is the identical SFID of IP flow distribution of the identical qos parameter of same MBS business, by different R6 tunnel transmission it is transferred to the base station; And in the present embodiment, between ASN gateway and base station, set up the R6 tunnel of a base station granularity, to send to the base station from the IP stream of MBS server by this tunnel, and distinguish the service parameter of different IP stream by the base station, and be mapped on different MCID and the LCID.So-called " base station granularity " is meant between each base station of ASN gateway and subordinate and only builds a tunnel.

Specifically as shown in Figure 5, in step 501, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 502, the ASN gateway directly passes through the R6 tunnel transmission of base station granularity to the base station with each IP stream of being received.In this step, the ASN gateway also needs to inform the base station, the corresponding relation of multicast IP stream and content identification.

Then enter step 503, after each IP packet is received in the base station, directly it is analyzed, obtain the IP stream information, and according to the corresponding relation of IP stream and content identification, distinguish the IP stream in the R6 tunnel, be the identical same MCID of IP flow distribution of the qos parameter of same MBS business, and the IP circulation that the qos parameter of same MBS business is identical is changed to MAC PDU and is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal.Because different MBS business can be distinguished by LCID with terminal in the base station, make terminal when certain MBS of request is professional, the base station can receive this MBS business by issuing the LCID indicating terminal in the logic channel of correspondence.

Fifth embodiment of the invention relates to the professional downlink transmission method of MBS.In the present embodiment, after the ASN gateway is received IP stream, by the Type-2 tunnel style to its processing of classifying, it is mapped to a service flow, carry out the compression of IP head at this service flow then, it is divided into MAC PDU from MAC service data unit (Service Data Unit is called for short " SDU "), on MAC PDU, can comprises control information (for example LCID).

Specifically as shown in Figure 6, in step 601, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 602, the ASN gateway is each the IP flow distribution SFID that is received, be the identical identical SFID of IP flow distribution of the qos parameter of same MBS business, and the data that each IP is flowed convert MAC layer data bag to by the Type-2 tunnel style, as MAC PDU, the MAC layer data bag that different IP stream in the same service flow is formed arrives the base station by different R6 tunnel transmission.Just the IP circulation being changed to MAC PDU at the ASN gateway transmits, make terminal to distinguish different multicast IP stream at the MAC layer, whether be self required reception and do not need that all MAC PDU are combined into the IP packet if just distinguishing this IP packet later on, this can reach the effect of saving amount of calculation and energy for terminal.

Then enter step 603, the base station is that each service flow of being received is distributed MCID, and is carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal being converted to MAC PDU (if be MACPDU then do not need conversion) from the MAC packet in different R6 tunnel in the same service flow.Same because different MBS business can be distinguished by LCID with terminal in the base station, make terminal when certain MBS of request is professional, the base station can receive this MBS business by issuing the LCID indicating terminal in the logic channel of correspondence.

Sixth embodiment of the invention relates to the professional downlink transmission method of MBS, present embodiment and the 5th execution mode are roughly the same, its difference is, in the present embodiment, in the control information in the MACPDU packet header that the ASN gateway forms, comprise a LCID, no matter how the ASN gateway transmits to the data of base station, and the base station can be directly be transferred to terminal with the logic channel of eating dishes without rice or wine to connect of data by correspondence.

As shown in Figure 7, in step 701, the MBS server sends to the ASN gateway with the MBS service bearer in IP stream.

Then enter step 702, the ASN gateway will change MACPDU into from the IP circulation of MBS server, and the MAC PDU that forms for same IP stream is provided with identical LCID, MAC PDU is sent to the base station by the tunnel, the base station is according to the LCID among the MAC PDU, the MAC PDU that receives is carried in the corresponding logic channel of eating dishes without rice or wine to connect send to terminal.Because being about to IP stream at the ASN gateway is split as MAC PDU and transmits, and in the control information of MAC pdu header, increase LCID, make no matter to adopt which kind of form transmission between ASN gateway and base station, the base station can be directly be transferred to terminal with the logic channel of relevant MAC PDU by correspondence, and whether the packet that terminal can receive in the MAC layer discrimination is that self needs, the MAC PDU that need not to receive merges into the IP bag, discerns again, has reduced the operation of terminal.

In the present embodiment, the mode that LCID is set in MAC PDU can have following three kinds:

1, by newly-increased fixing LCID field on the packet header of MAC PDU, is used to be provided with LCID,, can also increases a reserved field alternatively in order to guarantee byte-aligned.As shown in Figure 8.

2, whether original reserved field sign MAC PDU is carrying MBS business in the packet header by MAC PDU, promptly original reserved field (Rsv) is changed into the MBS field, be used to identify the MBS business, if what carry among this MAC PDU is the MBS business datum, then this field is set to 1, otherwise is set to 0.In this MBS field is 1 o'clock, in the newly-increased LCID field in the packet header of this MAC PDU, is used to be provided with LCID, same, in order to guarantee byte-aligned, can increase a reserved field alternatively, as shown in Figure 9.The relative first kind of mode of this mode when not transmitting the MBS business, can reduce the space of MAC PDU, improves the utilance of interface-free resources.

3, can utilize an existing expansion technology in the prior art, the ESF sign is set to 1, for sub-head of expansion of MAC PDU structure, is used to be provided with LCID, and the structure of this expansion head as shown in figure 10.

More than three kinds of methods can be applied to equally in other execution mode of the present invention.

By the structure of MAC PDU is made amendment, newly-increased LCID sign, make terminal to begin whether the packet that identification receives is that self needs from the MAC layer, promptly receive interested business from the MAC layer, terminal need not after the synthetic IP bag of packet, carry out identification again, reduced the complexity of terminal operation.Even yet adopting this method, terminal still need all receive the data in the burst (Burst) in physical layer, is distinguished at the MAC layer then.In order further to reduce the complexity of terminal operation, can in expansion MBS-DATA-IE, be each LCID distributing independent physical resource, MAC PDU in the physical resource transmission counterlogic channel that passes through to be distributed, make terminal from physical layer just can identification receives data, thereby receive only the interested MACPDU of this terminal.

For the mode of logical channel assignment separated physical resource can have following several:

1. be that unit is each logical channel assignment physical resource with subchannel (Subchannel), by setting the subchannel number of being distributed, for belonging to all symbols that it eats dishes without rice or wine to connect at least one subchannel of each logical channel assignment.

2. be that unit is each logical channel assignment physical resource with symbol (Symbol), by setting the number of symbols distributed, for each logical channel assignment belongs at least one symbol on its all subchannels of eating dishes without rice or wine to connect.

3. be that unit is each logical channel assignment physical resource with basic time-frequency piece (Slot), by setting the basic time-frequency piece number that is distributed, at least one belongs to the basic time-frequency piece of eating dishes without rice or wine to connect for each logical channel assignment.

4. the subchannel number by setting initial subchannel, being distributed, and the primary sign on these subchannels and the number of symbols that is distributed are defined as the physical resource of logical channel assignment.

Regulation according to 802.16e is specifically described above four kinds of methods below.

802.16e the expansion MBS-DATA-IE of defined is as follows:

In order in expansion MBS-DATA-IE, to be each LCID distribution physical resource, can make amendment to it by four kinds of modes:

One, each LCID adds the attribute specification of a Subchannel length.

Two, each LCID adds the attribute specification of a Symbol length.

Three, each LCID adds the attribute specification of a Slot length.

Shown in specific as follows:

In above LCID resource distribution mode, can be that unit carries out resource allocation with Subchannel, or be that unit carries out resource allocation, or be that unit carries out resource allocation with Slot with Symbol.With Slot being unit when carrying out resource allocation, can also be further divided into the preferential and preferential dual mode of Symbol of Subchannel.

Four, be each LCID distributing independent MBS DIUC, OFDMA symbol offset (primary sign), Subchannel offset (initial subchannel), Boosting, No.OFDMA symbols (number of symbols), No.subchannels (subchannel number), Repetition coding indication.

In the 4th kind of method, MBS DIUC, Boosting, Repetition coding indication and resource allocation do not have and contact directly, if be the MBS DIUC that each LCID distributed, Boosting, Repetition coding indication is identical, be OFDMA symbol offset (primary sign), Subchannel offset (initial subchannel), No.OFDMA symbols (number of symbols), No.subchannels (subchannel number) difference, then can be each logic channel unified distribution MBS DIUC, Boosting, Repetition coding indication, specific as follows shown in.

Seventh embodiment of the invention relates to the professional descending transmitting system of MBS.

Comprise MBS server, at least one ASN gateway and base station, wherein, the MBS server also comprises the MBS server service transmission unit that is used for the MBS service bearer is sent at IP stream the ASN gateway; The ASN gateway also comprises and is used for each the IP stream from the MBS server is carried on the ASN gateway service transmission unit that service flow sends to the base station; The base station also comprises and is used for each the MBS business from the service flow of ASN gateway is carried on the BTS service transmission unit that sends to terminal in the logic channel of eating dishes without rice or wine to connect respectively.

Wherein, ASN gateway service transmission unit and BTS service transmission unit can also have one of following six functions:

ASN gateway service transmission unit also is used for, for from the different SFID of each IP flow distribution of MBS server, corresponding to different service flow, and with each service flow respectively by different R6 tunnel transmission to the base station; The BTS service transmission unit also is used for, and for each service flow from the ASN gateway is distributed different MCID respectively, the packet on the different service flow is converted to MAC PDU is carried on and different sends to terminal in eating dishes without rice or wine to connect.

Perhaps, the professional transmission unit of access service network gateway also is used for, and for from the different SFID of each IP flow distribution of MBS server, corresponding to different service flow, and each service flow is arrived the base station by different tunnel transmission respectively; The BTS service transmission unit also is used for, for each service flow from access service network gateway is distributed MCID, the identical service flow of qos parameter that is same MBS business is distributed identical MCID, is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal having distributed packet on each service flow of identical MCID to be converted to MAC PDU.

Perhaps, the professional transmission unit of access service network gateway also is used for, and is the identical identical SFID of IP flow distribution of the qos parameter of same MBS business, corresponding service flow, and the different IP that will belong to this service flow by different tunnels spreads and is passed to the base station; Be each IP flow distribution SFID,, and it be carried in the identical service flow by different tunnel transmission to the base station if the qos parameter of IP stream is identical then be the identical SFID of these IP flow distribution from the MBS server; The BTS service transmission unit also is used for, and is to distribute MCID from the service flow of access service network gateway, is carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal being converted to MAC PDU from the content in different tunnels in the same service flow.

Perhaps, the professional transmission unit of access service network gateway also is used for, and will pass through the tunnel transmission of base station granularity to the base station from each IP stream of MBS server; The BTS service transmission unit also is used for, be the identical same MCID of IP flow distribution of qos parameter that belongs to same MBS business in the tunnel, and will have distributed the IP circulation of identical MCID to be changed to MAC PDU to be carried in the same Different Logic channel of eating dishes without rice or wine to connect and to send to terminal.

Perhaps, the professional transmission unit of access service network gateway also is used for, be each IP flow distribution SFID from the MBS server, be the identical identical SFID of IP flow distribution of the qos parameter of same MBS business, corresponding service flow, and the data transaction of each IP stream become MAC layer data bag, the MAC layer data bag that different IP stream in the same service flow is formed arrives the base station by different tunnel transmission; If the qos parameter of IP stream is identical then be the identical SFID of these IP flow distribution, and convert thereof into MAC PDU, be carried in the identical service flow by different tunnel transmission to the base station; The BTS service transmission unit also is used for, for the service flow from access service network gateway is distributed different MCID respectively, and be carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and send to terminal with being converted to MAC PDU from the MAC layer data bag in different tunnels in the same service flow.

Perhaps, the professional transmission unit of access service network gateway also is used for, to change MAC PDU into from the IP circulation of MBS server, and, MAC PDU is carried in the corresponding logic channel by the tunnel send to the base station for the MAC PDU of same IP stream formation is provided with identical LCID;

The BTS service transmission unit also is used for, and according to the LCID among the MAC PDU, the MACPDU that is received is carried in the corresponding logic channel sends to terminal.

Eighth embodiment of the invention relates to the system that is provided with of Logic Channel Identifier, comprises module is set, and is used at MAC layer data bag packet header new field LCID being set.

This is provided with module newly-increased LCID field on the packet header of MAC PDU, and LCID is set.

Or whether reserved field in MAC pdu header sign MAC PDU comprises the LCID field, is designated when comprising the LCID field at reserved field, in the newly-increased LCID field in the packet header of MAC PDU, LCID is set.

Or, be the sub-head type of the newly-increased expansion of MAC PDU, at the sub-head of the expansion of newly-increased type the LCID sign is set, this newly-increased sub-head type of expansion is as shown in figure 10.。

By above three kinds of set-up modes, make terminal to differentiate different MACPDU at the MAC layer, the MAC PDU that need not to receive forms IP layer data bag and differentiates, has reduced the reception operation of terminal, for terminal offers convenience.

Ninth embodiment of the invention relates to a kind of base station, comprises:

Resource distribution module is used to same each the logical channel assignment separated physical resource that comprises of eating dishes without rice or wine to connect, and notifies terminal with the corresponding relation of logic channel and its physical resource; Sending module is used for the MAC PDU with the formation of the professional different IP stream of same MBS, is carried in the Different Logic channel corresponding physical resource to send to terminal.By this mode, make terminal from physical layer just can identification receives data, thereby receive only the interested MAC PDU of this terminal, further reduced terminal and received operation complexity.

Wherein, resource distribution module is the logical channel assignment separated physical resource one of in the following manner:

With the subchannel is that unit is the logical channel assignment physical resource, by setting the subchannel number of being distributed, for belonging to all symbols that it eats dishes without rice or wine to connect at least one subchannel of each logical channel assignment.

Or, be that unit is the logical channel assignment physical resource with the symbol, by setting the number of symbols distributed, for each logical channel assignment belongs at least one symbol on its all subchannels of eating dishes without rice or wine to connect.

Or, be that unit is the logical channel assignment physical resource with basic time-frequency piece, by setting the basic time-frequency piece number that is distributed, at least one belongs to its basic time-frequency piece of eating dishes without rice or wine to connect for each logical channel assignment.

Or, by the subchannel number of setting initial subchannel, being distributed, and primary sign on these subchannels and the number of symbols that distributed, be defined as the physical resource of logical channel assignment.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims

1. a Multimedia Broadcast Multicast Service downlink transmission method is characterized in that, comprises following steps:

2. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1, it is characterized in that, described Access Service Network Gateway is the different service flow sign of being received of each IP flow distribution, corresponding to different service flow, each service flow is arrived described base station by different tunnel transmission respectively;

Described base station is that each service flow of being received is distributed different multicast connection identifiers respectively, the packet on the different service flow is converted to MAC layer protocol Data Unit MAC PDU is carried on and different sends to terminal in eating dishes without rice or wine to connect.

3. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1, it is characterized in that, described access service network gateway is the different service flow sign of being received of each IP flow distribution, corresponding to different service flow, each service flow is arrived described base station by different tunnel transmission respectively;

Described base station is that each service flow of being received is distributed multicast connection identifiers, the identical service flow of QoS parameter that is same MBS business is distributed identical multicast connection identifiers, is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal having distributed packet on each service flow of identical multicast connection identifiers to be converted to MAC PDU.

4. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1, it is characterized in that, described access service network gateway is each IP flow distribution service flow sign of being received, be the identical service flow sign of the identical IP flow distribution of the QoS parameter of same MBS business, corresponding service flow, the different IP that will belong to this service flow by different tunnels spreads and is passed to described base station;

Described base station is that each service flow of being received is distributed multicast connection identifiers respectively, is carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal being converted to MAC PDU from the content in different tunnels in the same service flow.

5. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1 is characterized in that, described access service network gateway directly arrives described base station by the tunnel transmission of base station granularity with each IP stream of being received;

Described base station is the identical same multicast connection identifiers of IP flow distribution of QoS parameter that belongs to same MBS business in the described tunnel, and the described IP circulation that has distributed identical multicast connection identifiers is changed to MAC PDU is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal.

6. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1, it is characterized in that, described access service network gateway is each IP flow distribution service flow sign of being received, be the identical service flow sign of the identical IP flow distribution of the QoS parameter of same MBS business, corresponding service flow, and the data transaction of each IP stream become MAC layer data bag, the MAC layer data bag that different IP stream in the same service flow is formed arrives described base station by different tunnel transmission;

Described base station is that each service flow of being received is distributed multicast connection identifiers respectively, and is carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal being converted to MAC PDU from the MAC layer data bag in different tunnels in the same service flow.

7. Multimedia Broadcast Multicast Service downlink transmission method according to claim 1, it is characterized in that, described access service network gateway will change MAC PDU into from the IP circulation of MBS server, and by access service network gateway or MBS agency for the MAC PDU that same IP stream forms is provided with identical Logic Channel Identifier, described MAC PDU is sent to described base station by the tunnel;

Described base station is according to the Logic Channel Identifier among the MAC PDU, the MAC PDU that is received is carried in the logic channel of described correspondence to send to terminal.

8. according to each described Multimedia Broadcast Multicast Service downlink transmission method in the claim 3 to 7, it is characterized in that,, described Logic Channel Identifier is set by newly-increased Logic Channel Identifier field on the packet header of described MAC PDU.

9. according to each described Multimedia Broadcast Multicast Service downlink transmission method in the claim 3 to 7, it is characterized in that, whether be carrying MBS business to original reserved field in the packet header by described MAC PDU if identifying described MACPDU, in the newly-increased Logic Channel Identifier field in the packet header of the MAC PDU that carries the MBS business, described Logic Channel Identifier is set.

10. according to each described Multimedia Broadcast Multicast Service downlink transmission method in the claim 3 to 7, it is characterized in that, is the sub-head type of the newly-increased expansion of described MAC PDU, at the sub-head of the expansion of described newly-increased type described Logic Channel Identifier is set.

11. according to each described Multimedia Broadcast Multicast Service downlink transmission method in the claim 3 to 7, it is characterized in that, described base station is each logical channel assignment separated physical resource, and the MAC PDU in each logic channel is carried in the separated physical resource and sends to terminal.

12. the method to set up of a Logic Channel Identifier is characterized in that, comprises following steps:

At MAC layer data bag new field, described Logic Channel Identifier is set.

13. the method to set up of Logic Channel Identifier according to claim 12 is characterized in that, newly-increased Logic Channel Identifier field is provided with described Logic Channel Identifier on the packet header of described MAC PDU.

14. the method to set up of Logic Channel Identifier according to claim 12, it is characterized in that, identify described MAC PDU by the reserved field in the packet header of described MAC PDU and whether comprise the Logic Channel Identifier field, be designated when comprising the Logic Channel Identifier field, in the newly-increased Logic Channel Identifier field in the packet header of MAC PDU, described Logic Channel Identifier is set.

15. the method to set up of Logic Channel Identifier according to claim 12 is characterized in that, is the sub-head type of the newly-increased expansion of described MAC PDU, at the sub-head of the expansion of described newly-increased type described Logic Channel Identifier is set.

16. a base station sends the method for Multimedia Broadcast Multicast Service, it is characterized in that, comprises following steps:

17. base station according to claim 16 sends the method for Multimedia Broadcast Multicast Service, it is characterized in that, be described logical channel assignment separated physical resource one of in the following manner:

With the subchannel is that unit is described logical channel assignment physical resource, by setting the subchannel number of being distributed, for belonging to described all symbols of eating dishes without rice or wine to connect at least one subchannel of each logical channel assignment;

With the symbol is that unit is described logical channel assignment physical resource, by setting the number of symbols distributed, for each logical channel assignment belongs at least one symbol on described all subchannels of eating dishes without rice or wine to connect;

With basic time-frequency piece is that unit is described logical channel assignment physical resource, and by setting the basic time-frequency piece number that is distributed, at least one belongs to described basic time-frequency piece of eating dishes without rice or wine to connect for each logical channel assignment;

By the subchannel number of setting initial subchannel, being distributed, and primary sign on these subchannels and the number of symbols that distributed, be defined as the physical resource of described logical channel assignment.

18. descending transmitting system of Multimedia Broadcast Multicast Service, comprise MBS server, at least one access service network gateway and base station, it is characterized in that described MBS server also comprises the MBS server service transmission unit that is used for the MBS service bearer is sent at IP stream described access service network gateway;

19. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18, it is characterized in that, the professional transmission unit of described access service network gateway also is used for, for identifying from the different service flow of each IP flow distribution of described MBS server, corresponding to different service flow, and with each service flow respectively by different tunnel transmission to described base station;

Described BTS service transmission unit also is used for, and for each service flow from described access service network gateway is distributed different multicast connection identifiers respectively, the packet on the different service flow is converted to MACPDU is carried on and different sends to terminal in eating dishes without rice or wine to connect.

20. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18, it is characterized in that, the professional transmission unit of described access service network gateway also is used for, for identifying from the different service flow of each IP flow distribution of described MBS server, corresponding to different service flow, and with each service flow respectively by different tunnel transmission to described base station;

Described BTS service transmission unit also is used for, for each service flow from described access service network gateway is distributed multicast connection identifiers, the identical service flow of QoS parameter that is same MBS business is distributed identical multicast connection identifiers, is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal having distributed packet on each service flow of identical multicast connection identifiers to be converted to MAC PDU.

21. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18, it is characterized in that, the professional transmission unit of described access service network gateway also is used for, be the identical service flow sign of the identical IP flow distribution of the QoS parameter of same MBS business, corresponding service flow, the different IP that will belong to this service flow by different tunnels spreads and is passed to described base station;

Described BTS service transmission unit also is used for, be to distribute multicast connection identifiers, be carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and send to terminal with being converted to MAC PDU from the content in different tunnels in the same service flow from the service flow of described access service network gateway.

22. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18 is characterized in that, the professional transmission unit of described access service network gateway also is used for, and will pass through the tunnel transmission of base station granularity to described base station from each IP stream of described MBS server;

Described BTS service transmission unit also is used for, be the identical same multicast connection identifiers of IP flow distribution of QoS parameter that belongs to same MBS business in the described tunnel, and the described IP circulation that has distributed identical multicast connection identifiers is changed to MAC PDU is carried in the same Different Logic channel of eating dishes without rice or wine to connect and sends to terminal.

23. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18, it is characterized in that, the professional transmission unit of described access service network gateway also is used for, be each IP flow distribution service flow sign from described MBS server, be the identical service flow sign of the identical IP flow distribution of the QoS parameter of same MBS business, corresponding service flow, and the data transaction of each IP stream become MAC layer data bag, the MAC layer data bag that different IP stream in the same service flow is formed arrives described base station by different tunnel transmission;

Described BTS service transmission unit also is used for, for the service flow from described access service network gateway is distributed different multicast connection identifiers respectively, and be carried on respectively in the same Different Logic channel of eating dishes without rice or wine to connect and send to terminal with being converted to MAC PDU from the MAC layer data bag in different tunnels in the same service flow.

24. the descending transmitting system of Multimedia Broadcast Multicast Service according to claim 18, it is characterized in that, the professional transmission unit of described access service network gateway also is used for, to change MAC PDU into from the IP circulation of MBS server, and, described MAC PDU is sent to described base station by the tunnel for the MAC PDU of same IP stream formation is provided with identical Logic Channel Identifier;

Described BTS service transmission unit also is used for, and according to the Logic Channel Identifier among the MAC PDU, the MAC PDU that is received is carried in the logic channel of described correspondence and sends to terminal.

25. the system that is provided with of a Logic Channel Identifier comprises module is set, and is used at MAC layer data bag new field described Logic Channel Identifier being set.

26. the method to set up of Logic Channel Identifier according to claim 25 is characterized in that, the described module that is provided with also is used for newly-increased Logic Channel Identifier field on the packet header of MAC PDU, and described Logic Channel Identifier is set.

27. the method to set up of Logic Channel Identifier according to claim 25, it is characterized in that, the described module that is provided with also is used for reserved field at described MAC pdu header and identifies described MACPDU and whether comprise the Logic Channel Identifier field, be designated when comprising the Logic Channel Identifier field at described reserved field, in the newly-increased Logic Channel Identifier field in the packet header of MAC PDU, described Logic Channel Identifier is set.

28. the method to set up of Logic Channel Identifier according to claim 25 is characterized in that, the described module that is provided with also is used to the sub-head type of the newly-increased expansion of described MAC PDU, at the sub-head of the expansion of described newly-increased type described Logic Channel Identifier is set.

29. a base station is characterized in that, comprises:

30. base station according to claim 29 is characterized in that, described resource distribution module is described logical channel assignment separated physical resource one of in the following manner: