CN101005338B - Multiplexing method for broadcast multicast service data and de-multiplexing method - Google Patents

Multiplexing method for broadcast multicast service data and de-multiplexing method Download PDF

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CN101005338B
CN101005338B CN2006100056727A CN200610005672A CN101005338B CN 101005338 B CN101005338 B CN 101005338B CN 2006100056727 A CN2006100056727 A CN 2006100056727A CN 200610005672 A CN200610005672 A CN 200610005672A CN 101005338 B CN101005338 B CN 101005338B
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broadcast
service data
multicast service
multiplexing
network side
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CN101005338A (en
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丁颖哲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2006/002684 priority patent/WO2007082431A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The method includes steps: network side transfers each broadcast/multicast traffic (BMT) data after processed by medium access control layer to physical layer; based on multiplexing control information, physical layer executes multiplexing process for each BMT data. The invention also discloses method for demultiplexing BMT data. The demultiplexing method includes steps: after demodulation at physical layer, UE obtains multiplexing control information (MCI) in use for multiplexing processing BMT data down sent from network side; based on MCI, physical layer only carries out demultiplexing and demodulating processes for relevant BMT data in broadcast/multicast multiplexing traffic data down sent from network side. The invention reduces power consumption needed by UE to demodulate multiplexing data, and guarantees that all UE with different transmission bandwidth can receive needed BMT, and gets better balance between performance of BMT and use ratio of wireless resources.

Description

The multiplexing method of broadcast and multicast service data and Deplexing method
Technical field
The present invention relates to the broadcasting multicast service technical field in 3-G (Generation Three mobile communication system) and the next generation mobile communication system, especially relate to a kind of multiplexing method and corresponding Deplexing method thereof of broadcast and multicast service data.
Background technology
Be accompanied by the development of mobile communication technology, the user no longer is satisfied with speech business to the demand of mobile communication business, because 3-G (Generation Three mobile communication system) and next generation mobile communication system are (as orthogonal frequency division multiplex OFDM, Orthogonal Frequency Division Multiplexing system etc.) can provide the message transmission rate higher than second generation mobile communication system, therefore a large amount of multimedia services just emerge, such as: services such as Internet network are downloaded, browsed at a high speed to visual telephone, picture.Wherein, some applied business require a plurality of users can receive identical data simultaneously, such as: business such as video request program, television broadcasting, video conference, online education, interactive game.
In order effectively to utilize the mobile communications network resource, 3-G (Generation Three mobile communication system) has been introduced the notion of multicast and broadcasting, and multimedia broadcast/multicast service is a kind of technology that transmits identical data from a data source to a plurality of targets.Thus, the WCDMA/GSM global standardsization organize 3GPP to propose multimedia broadcast/group broadcast service (MBMS, Multimedia Broadcast/Multicast Service), so-called MBMS is professional to provide a data source to send the point-to-multipoint service of identical data to a plurality of users in mobile communications network exactly, share to realize Internet resources, improve the utilance of utilization rate of network resource, especially air interface resource.Wherein the MBMS business of 3GPP proposition not only can realize the multicast and the broadcasting of plain text low rate information series business, but also can realize the multicast and the broadcasting of high-speed multimedia business.
Wherein in the MBMS operation system, network side can transmit a plurality of different MBMS business simultaneously; For the user terminal (UE that receives the MBMS business, User Equipment), to whether subscribe to this MBMS business and the receiving ability of self according to self and select whether to receive this MBMS business, if it is professional and have an ability of this MBMS business of reception that is: UE has subscribed to this MBMS, then this MBMS business is received, otherwise will not receive.
As shown in Figure 1, transmit simultaneously under 4 different MBMS service conditions for the existing network side, the user is to the accepting state schematic diagram of corresponding MBMS business, and network side transmits four different MBMS business simultaneously a moment among the figure; If user X has subscribed to professional 1 and professional 2 (S1 and S2) in advance, then user X only receives treatment S 1 and the S2 business is just passable, and other two business that issue for network side will not receive, and promptly other two business (S3 and S4) are not received processing.As mentioned above, a plurality of MBMS business issue under the situation of transmission simultaneously in the MBMS operation system, UE will optionally receive a plurality of MBMS business that network side issues according to the situation of own subscribing MBMS business, for the MBMS business that does not have to subscribe to, UE can receive processing, thereby reduces the power consumption of UE.Wherein in the MBMS operation system, issue simultaneously under the situation of a plurality of MBMS business of transmission, therefore network side is that a plurality of different MBMS business are carried out issuing after the multiplexing process, makes relevantly how a plurality of different MBMS business to be carried out multiplexing process and become research hot issue in the MBMS technical field.
At present in WCDMA R6 version, professional transmission of relevant MBMS and multiplex technique have been proposed, owing to be subjected to the restriction of original version at that time, and made the multiplexing process process of a plurality of MBMS business in MAC layer (MAC, Media Access Control) layer, to carry out.Wherein, need in the MAC layer of UTRAN side and UE side, to increase respectively the MAC-m protocol architecture, to be used for that the MBMS business is carried out multiplexing and transmission process for the MBMS transmission business.
As shown in Figure 2, a plurality of MBMS business are carried out the process schematic diagram of multiplexing process for the MAC-m protocol architecture of existing UTRAN side, in the UTRAN side, different MBMS business enters the MAC-m of system end by MBMS logic channel separately, MAC-m can be respectively the professional corresponding MBMS_ID (MBMS traffic identification number) that adds of each MBMS, then a plurality of MBMS business are carried out multiplexing process, to the scheduling service data after the multiplexing process, select corresponding transformat to be transferred to physical layer for the business datum after the scheduling processing at last again.
Accordingly, as shown in Figure 3, the MBMS multiplexing service that receives is carried out the process schematic diagram of demultiplexing processing for the MAC-m protocol architecture of existing UE side, the physical layer of UE is after demodulating the MBMS multiplexing service data that receive, can all report MAC-m, the MAC-m of UE side can carry out demultiplexing to the MBMS multiplexing service that physical layer reports to be handled, to obtain the MBMS_ID of each MBMS business, UE just can handle the MBMS_ID information that obtains according to the MAC-m demultiplexing like this, the MBMS that self is subscribed to is professional and then report high-rise the continuation and handle, and the MBMS business of simultaneously self not being subscribed to abandons to be disregarded.
But, in the MAC of UTRAN side layer, a plurality of MBMS business are carried out multiplexing process based on what propose in the WCDMA R6 version, and in the MAC of UE side layer, the MBMS business that receives is carried out demultiplexing and handle, but exist certain limitation, specific as follows:
1, because in the UTRAN side, it is multiplexing in the encoding block of a physical layer that a plurality of MBMS business are carried out multiplexing, different MBMS business datum at the MAC layer.Like this when UE receives the MBMS multiplexing service data that the UTRAN side issues, the physical layer of UE is only known the subframe at required MBMS business datum place, and can not really required MBMS business datum be discerned, must have only the whole demodulation of all multiplexing service data in the multiplexed sequence are come out to report the MAC layer, by the MAC layer MBMS multiplexing service data are carried out after demultiplexing handles, to obtain the MBMS_ID of each MBMS business, the user can recognize own interested MBMS business, and then selects and oneself want the MBMS business datum that receives.
Specifically as shown in Figure 4, for the existing network side a plurality of MBMS business datums are carried out multiplexing process and issue, and UE selects the processing procedure schematic diagram of corresponding MBMS business datum according to the MBMS service conditions of self liking in MBMS multiplexing service data; This shows, when network side carries out multiplexing process when issuing with the MBMS business datum (as the Video business datum) of the MBMS business datum (as the Text business datum) of low rate and two-forty, if UE only wants to receive the MBMS business datum of low rate, need a large amount of power of physical layer cost to go high-rate service data in the demodulation MBMS multiplexing service data also, the UE physical layer is carried out demodulation process without any meaning for the MBMS business datum of high rate speed in this case in fact, and the process that makes the UE physical layer carry out demodulation for nonsensical MBMS business datum like this will too much consume the power of UE.
2, because different MBMS business datums is that different service quality (QoS is arranged, Quality ofService) requires, then different MBMS business datums is the desired error rate (BER in the coded modulation processing procedure, Bit Error Rite) also be inequality, it is just different that following published article spare and voice and video flow needed BER standard, it is the 10E-3 rank that the BER of video flowing (video) and voice flow (audio) requires, and the BER of file in download or software requirement is the 10E-6 rank.If network side carries out different MBMS business datums when multiplexing at the MAC layer like this, then also must adopt identical channel coding method and modulation system in physical layer for different MBMS business datums with different B ER demand, therefore if guarantee the service feature requirement of the MBMS business that each is re-used, then can cause utilization ratio of wireless resources to reduce; And if the assurance utilization ratio of wireless resources then just can not guarantee the service feature requirement of the MBMS business that part is re-used.
3, in next generation mobile communication system, as long-time evolution items tissue (LTE, Long TermEvolution) ofdm system of formulating, will support different UE can receive the MBMS business datum that network side issues based on different transmission bandwidths, if like this network side with a plurality of different MBMS business datums when the MAC layer carries out multiplexing process, will increase the transmission bandwidth of MBMS business datum, thereby may cause the low UE of transmission bandwidth ability can not receive corresponding M BMS business.For example: network side will send MBMS business 1 (S1) and MBMS business 2 (S2), suppose to send the transmission bandwidth that professional S1 need take 3MHz, send the transmission bandwidth that professional S2 need take 5MHz, two MBMS business (S1 and S2) that network side will issue issue the transmission bandwidth that takies 8MHz after the MAC layer carries out multiplexing process; Like this when a transmission bandwidth ability of only having subscribed to the user UE1 of MBMS business 1 (S1) is 5MHz, can only see the Business Stream of a 8MHz transmission bandwidth in physical layer, the transmission bandwidth ability 5MHz that has surpassed self, therefore can not receive the multiplexing MBMS business datum that issues of network side, thereby also just not receive the data of the MBMS business 1 (S1) of self subscribing to.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of multiplexing method and Deplexing method thereof of broadcast and multicast service data, to reduce UE is the power consumption that the demodulation multiplex data needs, and the UE that guarantees different transmission bandwidths can both receive required broadcasting multicast service, simultaneously the relation of broadcasting multicast service performance and wireless resource utility efficiency carried out balanced preferably.
For addressing the above problem, the technical scheme that the present invention proposes is as follows:
A kind of multiplexing method of broadcast and multicast service data comprises step:
Each broadcast and multicast service data after network side is handled MAC layer is sent to physical layer;
According to multiplexing control information each broadcast and multicast service data is carried out multiplexing process by physical layer; And
Broadcast group broadcast multiplexing service data and the corresponding multiplexing control information of network side after with multiplexing process is handed down to user terminal respectively.
Wherein, the process of each broadcast and multicast service data being carried out multiplexing process by physical layer comprises:
Network side carries out chnnel coding in physical layer respectively to each broadcast and multicast service data to be handled; And
Each broadcast and multicast service data after according to multiplexing control information chnnel coding being handled is modulated and multiplexing process.
Wherein, by MAC layer the processing that each broadcast and multicast service data carries out is comprised:
The priority orders of the broadcast and multicast service data that network side issues according to each preparation in MAC layer, the broadcast and multicast service data that each preparation is issued is dispatched processing successively; And
For the broadcast and multicast service data after each scheduling processing distributes corresponding transformat.
Preferably, the transformat that network side is assigned with in MAC layer according to each broadcast and multicast service data in physical layer is selected corresponding channel coding method that each broadcast and multicast service data is carried out chnnel coding respectively and is handled.
Preferably, the Block Error Rate demand of the broadcast and multicast service data that network side issues according to each preparation in MAC layer is respectively each broadcast and multicast service data and distributes corresponding transformat.
Preferably, network side is modulated each broadcast and multicast service data and the process of multiplexing process specifically comprises in physical layer:
Network side each broadcast and multicast service data after physical layer is handled chnnel coding respectively carries out corresponding modulation treatment; And
Carry out multiplexing process according to multiplexing control information each broadcast and multicast service data after to modulation treatment.
Preferably, network side is modulated each broadcast and multicast service data and the process of multiplexing process specifically comprises in physical layer:
Network side each broadcast and multicast service data after physical layer is handled chnnel coding according to multiplexing control information carries out multiplexing process; And
Broadcast group broadcast multiplexing service data after the multiplexing process are carried out modulation treatment.
Preferably, network side carries out multiplexing process according to following at least a multiplex mode to each broadcast and multicast service data in physical layer:
The code division multiplexing mode;
The frequency division multiplexing mode; And
Time division multiplexing mode.
Preferably, described network is the OFDM networks system.Then network side carries out multiplexing process according to following at least a multiplex mode to each broadcast and multicast service data in physical layer:
Frequency division multiplexing mode in the frame;
Time division multiplexing mode in the frame;
Multiplex mode at random in the frame; And
The interframe time division multiplexing mode.
Preferably, described method comprises that also the pairing broadcasting multicast service identifier of broadcast and multicast service data that network side issues each preparation is handed down to the step of user terminal.
Preferably, network side in physical layer with the part of each broadcasting multicast service identifier as corresponding broadcast and multicast service data, multiplexing in the multiplexing service data of each broadcast and multicast service data, be handed down to user terminal in the lump with broadcast group broadcast multiplexing service data.
Preferably, network side pairing broadcasting multicast service identifier of broadcast and multicast service data that each preparation is issued and multiplexing control information are carried in the lump and are handed down to user terminal in the broadcast multicase control information.
Preferably, network side is handed down to user terminal with multiplexing control information by one of following manner:
Be handed down to user terminal by broadcast multicast service control channel;
Be handed down to user terminal by Broadcast Control Channel;
Multiplexing control information and broadcast group broadcast multiplexing service data are handed down to user terminal by the broadcasting multicast service channel in the lump.
A kind of Deplexing method of broadcast and multicast service data comprises step:
User terminal obtains the multiplexing control information that is used for the broadcast and multicast service data multiplexing process that network side issues in the physical layer demodulation; And
The broadcasting multicast service identifier of each broadcast and multicast service data in the broadcast group broadcast multiplexing service data that user terminal receives and demodulation map network side issues; And
Each the broadcasting multicast service identifier that obtains according to demodulation is in the broadcast group broadcast multiplexing service data that network side issues;
Based on the multiplexing control information that demodulation obtains, only the relevant broadcast and multicast service data that identifies is carried out demultiplexing and demodulation process in physical layer.
Preferably, user terminal demodulates the pairing broadcasting multicast service identifier of each broadcast and multicast service data the broadcast group broadcast multiplexing service data that physical layer issues from network side.
Preferably, user terminal demodulates the pairing broadcasting multicast service identifier of each broadcast and multicast service data in physical layer from the broadcast multicase control information that network side issues.
Preferably, user terminal specifically comprises the process that the relevant broadcasts multi-cast business data carries out demultiplexing and demodulation process:
Each broadcasting multicast service identifier that user terminal obtains according to demodulation, the relevant broadcasts multi-cast business data in the broadcast group broadcast multiplexing service data that the recognition network side issues; And
Only the broadcast and multicast service data that recognizes is carried out the demultiplexing processing according to the multiplexing control information that demodulation obtains in physical layer; And
Each broadcast and multicast service data after the demultiplexing processing is carried out demodulation process respectively.
Preferably, user terminal specifically comprises the process that the relevant broadcasts multi-cast business data carries out demultiplexing and demodulation process:
Each broadcasting multicast service identifier that user terminal obtains according to demodulation, the relevant broadcasts multi-cast business data in the broadcast group broadcast multiplexing service data that the recognition network side issues; And
Only the broadcast and multicast service data that recognizes is carried out demodulation process in physical layer; And
The broadcast group broadcast multiplexing service data of the multiplexing control information that obtains according to demodulation after to demodulation process are carried out demultiplexing and are handled.
Wherein, described relevant broadcasts multi-cast business data is: the user's interest broadcast and multicast service data; Or the broadcast and multicast service data subscribed to of user.
The beneficial effect that the present invention can reach is as follows:
The present invention program proposes network side and in physical layer a plurality of broadcast and multicast service datas is carried out multiplexing process, and proposes UE demodulate self interested business datum the broadcast group broadcast multiplexing service data that physical layer only issues from network side, thereby can reach:
The physical layer of A.UE end only needs to demodulate user's interest (or having subscribed to) business datum, reports high-rise the continuation and handles and needn't demodulate a large amount of unwanted business datums, thereby reached the purpose of conserve power consumption for UE;
B. the physical layer of network side can be according to the demand of different broadcasting multicast services to BLER, being respectively every kind of broadcast and multicast service data selects respective coding and modulation system that it is encoded and modulation treatment, thereby solved the performance of broadcasting multicast service and the contradictory problems of Radio Resource utilization ratio, guaranteed the balance between performance of services and the wireless resource utility efficiency preferably;
C. because next generation mobile communication system (as the mobile communication system that adopts the OFDM technology etc.) in transmission broadcasting multicast service process, can the UE of different transmission bandwidth abilities be supported, after adopting the present invention program like this, different UE receives only the business datum that demodulation oneself can be supported in physical layer, the UE that therefore can guarantee to have different transmission bandwidth abilities can receive the broadcast and multicast service data of self, has effectively solved the reception problem of the UE of different transmission bandwidth abilities to broadcasting multicast service.
Description of drawings
Fig. 1 transmits under 4 different MBMS service conditions simultaneously for the existing network side, and the user is to the accepting state schematic diagram of corresponding MBMS business;
Fig. 2 carries out the process schematic diagram of multiplexing process to a plurality of MBMS business for the MAC-m protocol architecture of existing UTRAN side;
Fig. 3 carries out the process schematic diagram that demultiplexing is handled for the MAC-m protocol architecture of existing UE side to the MBMS multiplexing service that receives;
Fig. 4 carries out multiplexing process for the existing network side to a plurality of MBMS business datums and issues, and UE selects the processing procedure schematic diagram of corresponding MBMS business datum according to the MBMS service conditions of self liking in MBMS multiplexing service data;
Fig. 5 is the main realization principle flow chart of the multiplexing method of broadcast and multicast service data of the present invention;
Fig. 6 is for carrying out the multiplexing view of FDM multiplexing process in the frame to three different broadcast and multicast service datas in physical layer in ofdm system;
Fig. 7 is for carrying out the multiplexing view of TDM multiplexing process in the frame to three different broadcast and multicast service datas in physical layer in ofdm system;
Fig. 8 is for carrying out the multiplexing view of Scattered multiplexing process in the frame to three different broadcast and multicast service datas in physical layer in ofdm system;
Fig. 9 is for carrying out the multiplexing view of interframe TDM multiplexing process to three different broadcast and multicast service datas in physical layer in ofdm system;
Figure 10 is the main realization principle flow chart of the Deplexing method of broadcast and multicast service data of the present invention;
Figure 11 carries out the main body implementation procedure schematic diagram of multiplexing process to the MBMS business for the present invention program;
Figure 12 be in the embodiment of the invention according to the professional shared transmission bandwidth situation of each MBMS and the situation of user's subscribing MBMS business, different MBMS business are carried out the schematic diagram of multiplexing process.
Embodiment
In order to overcome in the existing WCDMAR6 version different MBMS business datums are carried out multiplexing process at the MAC layer, can increase UE power consumption, cause MBMS performance of services and wireless resource utility efficiency not to reach the limitation that good equilibrium and inapplicable UE with different transmission bandwidth abilities thereof can both receive the MBMS business, the present invention proposes broadcast and multicast service data multiplexing method and the corresponding Deplexing method thereof that the problems referred to above can be avoided fully.
Be explained in detail below in conjunction with main realization principle, embodiment and the corresponding beneficial effect thereof of each accompanying drawing the present invention program.
As shown in Figure 5, be the main realization principle flow chart of the multiplexing method of broadcast and multicast service data of the present invention, its main implementation procedure is as follows:
Step S10, (said here network can be supported the 3-G (Generation Three mobile communication system) of broadcasting multicast service ability to network side, as the WCDMA network system etc.; Can also be support the next generation mobile communication system of broadcasting multicast service ability, as the OFDM network system etc.) each broadcast and multicast service data after the MAC layer is handled is sent to physical layer;
The priority orders of the network side broadcast and multicast service data that can issue according to each preparation at the MAC layer wherein, the broadcast and multicast service data that each preparation is issued is dispatched processing successively, distribute corresponding transformat TF for the broadcast and multicast service data after each scheduling processing then, Block Error Rate (the BLER of the broadcast and multicast service data that can issue according to each preparation at the MAC layer wherein, Block Error Rate) demand, be respectively each broadcast and multicast service data and distribute corresponding transformat TF, and then the transmission channel of each broadcast and multicast service data that will distribute transformat TF by separately is transferred to physical layer by the MAC layer.
Step S20 carries out corresponding multiplexing process according to corresponding multiplexing control information to each broadcast and multicast service data by physical layer; Wherein specific as follows to the process of each broadcast and multicast service data execution multiplexing process by physical layer:
At first, network side carries out processing such as chnnel coding, symbol interleaving in physical layer respectively to each broadcast and multicast service data, the transformat TF that physical layer can be assigned with at the MAC layer according to each broadcast and multicast service data, be respectively each broadcast and multicast service data and select corresponding channel coding method, it is carried out processing such as corresponding chnnel coding, symbol interleaving;
Secondly, each broadcast and multicast service data after network side is handled above-mentioned chnnel coding in physical layer and then according to corresponding multiplexing control information is modulated and multiplexing process; Wherein network side can take each broadcast and multicast service data after dual mode is handled chnnel coding to modulate and multiplexing process in physical layer, and is specific as follows:
First kind: if each broadcast and multicast service data that network side is prepared to issue is mutually based on different channel coding methods and modulation system, then network side each broadcast and multicast service data after physical layer is handled chnnel coding at first respectively carries out corresponding modulation treatment;
And then carry out multiplexing process according to corresponding multiplexing control information each broadcast and multicast service data after to modulation treatment.
Second kind: if each broadcast and multicast service data that network side is prepared to issue is based on identical channel coding method and modulation system, then network side each broadcast and multicast service data after physical layer can at first be handled chnnel coding according to corresponding multiplexing control information carries out multiplexing process;
Then the broadcast group broadcast multiplexing service data after the multiplexing process are carried out unified modulation treatment.
In addition, if each broadcast and multicast service data that network side is prepared to issue is respectively based on identical channel coding method and modulation system, can also directly earlier carry out multiplexing process in physical layer, and then the multiplexing service data after the multiplexing process be carried out unified chnnel coding handle and modulation treatment each broadcast and multicast service data.
Wherein in above-mentioned steps S20, network side can be taked code division multiplexing (CDM in physical layer, CodeDivision Multiplexing) mode, frequency division multiplexing (FDM, Frequency Division Multiplexing) mode or time division multiplexing (TDM, Time Division Multiplexing) mode is carried out multiplexing process to each broadcast and multicast service data.
Concrete, if the multiplexing method of the broadcast and multicast service data that the present invention is proposed is applied in the OFDM network system, then in above-mentioned steps S20, network side can take following several multiplex mode that each broadcast and multicast service data is carried out multiplexing process in physical layer:
1. frequency division multiplexing mode (FDM in the frame) in the frame, as shown in Figure 6, for in ofdm system, three different broadcast and multicast service datas being carried out the multiplexing view of FDM multiplexing process in the frame in physical layer, be that different broadcast and multicast service datas transmits in a subframe simultaneously, each broadcast and multicast service data takies different subcarriers respectively;
2. time division multiplexing mode (TDM in the frame) in the frame, as shown in Figure 7, for in ofdm system, three different broadcast and multicast service datas being carried out the multiplexing view of TDM multiplexing process in the frame in physical layer, be that different broadcast and multicast service datas transmits in a subframe simultaneously, each broadcast and multicast service data takies different OFDM symbols respectively;
3. multiplex mode at random (Scattered in the frame) in the frame, as shown in Figure 8, for in ofdm system, three different broadcast and multicast service datas being carried out the multiplexing view of Scattered multiplexing process in the frame in physical layer, be that different broadcast and multicast service datas transmits in a subframe simultaneously, each broadcast and multicast service data takies different frequency hopping patterns respectively;
4. interframe time division multiplexing mode (interframe TDM), as shown in Figure 9, for in ofdm system, three different broadcast and multicast service datas being carried out the multiplexing view of interframe TDM multiplexing process in physical layer, promptly a subframe only is used for transmitting a broadcast and multicast service data, and different broadcast and multicast service datas takies different subframes respectively.
Subsequent network side and then broadcast group broadcast multiplexing service data after physical layer multiplex is handled and corresponding multiplexing control information are handed down to UE respectively, wherein network side can be with multiplexing control information by broadcast multicast service control channel (MCCH, MBMS Control Channel) is handed down to UE, also can be with multiplexing control information by Broadcast Control Channel (BCCH, Broadcast Control Channel) is handed down to UE, multiplexing control information and broadcast group broadcast multiplexing service data can also be handed down to UE by broadcasting multicast service channel (MTCH, MBMS Traffic Channel) in the lump.
Can in the broadcast group broadcast multiplexing service data that network side issues, find self broadcast and multicast service data interested or that subscribed to for the ease of follow-up UE, the pairing broadcasting multicast service identifier of the broadcast and multicast service data that network side also will issue each preparation (broadcasting multicast service ID) is handed down to UE, wherein network side can be with the part of each broadcasting multicast service identifier as the broadcast and multicast service data of correspondence in physical layer, multiplexing in the multiplexing service data of each broadcast and multicast service data, be handed down to UE in the lump with broadcast group broadcast multiplexing service data; Network side pairing broadcasting multicast service identifier of broadcast and multicast service data that each preparation can also be issued and multiplexing control information are carried in the lump and are handed down to UE in the broadcast multicase control information in addition.
Above-mentioned broadcasting multicast service mentioned in the multiplexing method of broadcast and multicast service data of the present invention can but be not limited to multimedia broadcast-multicast service MBMS.
Multiplexing method corresponding to the broadcast and multicast service data of the above-mentioned proposition of the present invention, the proposition that the present invention is also corresponding here a kind of Deplexing method of broadcast and multicast service data, as shown in figure 10, be the main realization principle flow chart of the Deplexing method of broadcast and multicast service data of the present invention, its main implementation procedure is as follows:
Step S100, UE at first obtain the multiplexing control information that is used for the broadcast and multicast service data multiplexing process that network side issues in the physical layer demodulation;
Step S200, the multiplexing control information that UE obtains based on above-mentioned demodulation, relevant broadcasts multi-cast business data in the broadcast group broadcast multiplexing service data that physical layer only issues network side carries out corresponding demultiplexing and demodulation process, wherein Xiang Guan broadcast and multicast service data can but be not limited to the user's interest broadcast and multicast service data, or the broadcast and multicast service data of having subscribed to for the user.
The broadcasting multicast service identifier of each broadcast and multicast service data in the corresponding broadcast group broadcast multiplexing service data that can side Network Based issue of UE wherein, identification interested (or having subscribed to) broadcast and multicast service data in the broadcast group broadcast multiplexing service data that network side issues; Wherein UE can demodulate the pairing broadcasting multicast service identifier of each broadcast and multicast service data the broadcast group broadcast multiplexing service data that physical layer issues from network side; Also can from the broadcast multicase control information that network side issues, demodulate the pairing broadcasting multicast service identifier of each broadcast and multicast service data in physical layer.
Then UE can realize by dual mode the process that broadcast and multicast service data interested carries out demultiplexing and demodulation process, and is specific as follows:
First kind: each broadcasting multicast service identifier that UE at first obtains according to demodulation, (or having subscribed to) the interested broadcast and multicast service data in the broadcast group broadcast multiplexing service data that the recognition network side issues;
The multiplexing control information that UE obtains according to demodulation is more only carried out demultiplexing to the broadcast and multicast service data that recognizes in physical layer and is handled;
Each broadcast and multicast service data after UE handles above-mentioned demultiplexing at last carries out demodulation process.
Second kind: each broadcasting multicast service identifier that UE at first obtains according to demodulation, (or having subscribed to) the interested broadcast and multicast service data in the broadcast group broadcast multiplexing service data that the recognition network side issues;
UE only carries out demodulation process to the broadcast and multicast service data that recognizes in physical layer;
The broadcast group broadcast multiplexing service data of the multiplexing control information that UE obtains according to demodulation again after to above-mentioned demodulation process are carried out demultiplexing and are handled.
Above-mentioned broadcasting multicast service mentioned in the Deplexing method of broadcast and multicast service data of the present invention can but be not limited to multimedia broadcast-multicast service MBMS.
In sum, the design philosophy of the Deplexing method of the multiplexing method of the broadcast and multicast service data that the present invention proposes and correspondence thereof (is that example describes with the MBMS business with the MBMS business exactly here, other broadcasting multicast services are suitable equally) the multiplexing process process transfer to physical layer by original MAC layer and carry out, the multiplexing process that is about to the MBMS business is moved the L1 layer from the L2 layer.As shown in figure 11, the MBMS business is carried out the main body implementation procedure schematic diagram of multiplexing process for the present invention program, wherein at the MAC layer, remove the multiplexing process process of MBMS business and the process of interpolation MBMS traffic identification number (MBMS_ID), only stay the scheduling processing of MBMS business and be the processing of MBMS service selection respective transmissions form; In physical layer, increase the multiplexing process process of MBMS business.Need in the physical layer of receiving terminal UE side, increase the demultiplexing processing procedure accordingly, and remove the demultiplexing processing procedure of MAC layer.Need transmit a plurality of different MBMS when professional when network side like this, the MAC layer is at first according to the priority relationship of each MBMS business, each MBMS business is dispatched processing successively, distribute corresponding transformat TF according to professional needed Block Error Rate (BLER) characteristic of each MBMS that is dispatched to for it again; Physical layer is modulated and is multiplexed on the physical channel and transmit after each MBMS business is carried out processing such as chnnel coding and symbol interleaving.At receiving terminal, the physical layer of UE is according to multiplexing control information (or having subscribed to) the MBMS business datum that only demodulates in the MBMS multiplexing service data that network side issues that self is interested, and ignore other uninterested (or not subscribe to) MBMS business datum, again and then the MBMS business datum that demodulates is reported high-rise the continuation handle.
Wherein network side can adopt as multiplex modes such as code division multiplexing (CDM), frequency division multiplexing (FDM) or Time Division Multiplexing when physical layer is carried out multiplexing process to a plurality of MBMS business datums in Figure 11; When the MBMS business datum is carried out when multiplexing in physical layer, its each professional corresponding MBMS_ID information of MBMS can be transmitted by dual mode: a kind of is in physical layer each MBMS business datum to be carried out increasing when multiplexing multiplexing to MBMS_ID, make MBMS_ID send together in company with the MBMS business datum, like this in receiving terminal UE side, to in MBMS multiplexing service data, demodulate each MBMS_ID earlier, again according to the MBMS_ID demodulates information go out in requisition for the MBMS business datum; Another method is that MBMS_ID and multiplexing control letter information are carried on transmission together in the MBMS control information simultaneously, like this in receiving terminal UE side, to from the MBMS control information, demodulate corresponding M BMS_ID earlier, and according to MBMS_ID in requisition for the MBMS business datum carry out demodulation process.
For example suppose that network side is carried on transmission together in the MBMS control information simultaneously with MBMS_ID and multiplexing control letter information, then network side carries out multiplexing process in physical layer to a plurality of MBMS business datums, and UE side physical layer is as follows to the process that self interested MBMS business datum is carried out demodulation process as required:
1) different MBMS business datum enters the MAC-m layer of system end by MBMS logic channel separately;
2) the MAC-m layer is according to the priority relationship between each MBMS business datum, each MBMS business datum is dispatched processing successively, and select corresponding transformat TF respectively for each MBMS business datum, as can be according to the demand difference of different MBMS business datums to BLER, select different TF for different MBMS business datums, then each MBMS business datum after the above-mentioned processing is arrived physical layer by transmission channel;
3) physical layer of system is the respective transmissions form TF that each MBMS business datum is selected according to the MAC-m layer, respectively each MBMS business datum is carried out processing such as chnnel coding, symbol-modulated;
4) physical layer of system is according to corresponding multiplexing control information, and each MBMS business datum is sent after the multiplexing process carrying out on the physical channel;
5) in receiving terminal UE side, the MBMS_ID that obtains according to the multiplexing control information and the demodulation of correspondence, in the MBMS multiplexing service data that the network system side issues, only user's interest (subscription) MBMS business datum is carried out demodulation process, and ignore the MBMS business datum of user's uninterested (not subscribing to), promptly user's's uninterested (not subscribing to) MBMS business datum is not carried out demodulation process, thereby make UE reach the purpose of conserve power consumption.
In above-mentioned treatment step, the multiplexing control information that UE uses, the UTRAN side can send to UE by the MCCH channel, also can send to UE by the BCCH channel, can also send with MBMS multiplexing service data, but the positional information of the transformat TF of multiplexing control information and the time-frequency resources that takies is that UTRAN and UE know altogether.
The implementation procedure of the implementation procedure of another situation and above-mentioned this kind situation is similar in addition, no longer too much gives unnecessary details here.
In order further to describe the present invention program in detail,, be that example is enumerated an embodiment and is described in detail with the MBMS business below in conjunction with the multiplexing method and the Deplexing method of the broadcast and multicast service data of the above-mentioned proposition of the present invention.
Suppose in a communication environment, physical layer adopts the OFDM technology, the communications bandwidth that Node B supports is 20MHz, the UE that has a plurality of transmission bandwidth abilities in the system simultaneously, the transmission bandwidth ability of wherein supposing UE_X is 20MHz, the transmission bandwidth ability of UE_Y is 10MHz, and the transmission bandwidth ability of UE_Z is 5MHz; Supposing that this moment, system had four different MBMS service needed to send, is respectively S1, S2, and S3 and S4, each MBMS business needs to take the transmission bandwidth of 5MHz respectively.Wherein, suppose that user UE_X has subscribed to S1, S2 and S3 business, UE_Y has subscribed to S2 and S3 business, and UE_Z has subscribed to the S4 business.Then system is to professional S1, S2, and the multiplex process of S3 and S4 and different UEs are as follows to the demultiplexing process of corresponding service:
1) the professional S1 of MBMS, S2, S3 and S4 enter into the MAC-m layer of system end by MBMS logic channel separately;
2) MAC-m is according to the professional S1 of MBMS, S2, the priority orders between S3 and the S4, respectively to professional S1, S2, S3 and S4 dispatch processing (the supposing the system resource are relatively more sufficient, four MBMS business can send simultaneously), and according to professional S1, S2, S3 and S4 are respectively to the conditions of demand of BLER, be followed successively by the corresponding transformat TF of each service selection, then with the professional S1 after the above-mentioned processing, S2, S3 and S4 by transmission channel to physical layer;
3) physical layer of system is professional S1 according to the MAC-m layer, S2, and the respective transmissions form TF that S3 and S4 select, respectively to professional S1, S2, S3 and S4 carry out processing such as chnnel coding, symbol-modulated;
4) physical layer of system is carried out multiplexing process to four MBMS business datums according to corresponding multiplexing control information on physical layer; Wherein here according to the professional shared transmission bandwidth situation of each MBMS and the situation of user's subscribing MBMS business, employing schematic diagram as shown in figure 12 is to professional S1, S2, S3 and S4 carry out multiplexing process, as shown in figure 12, wherein professional S2 and S3 adopt the multiplex mode of (scattered) at random to carry out multiplexing on the transmission bandwidth of a 10MHz, to improve frequency and the diversity gain of time, it is multiplexing that professional S1 and S4 adopt the FDM multiplex mode to carry out respectively;
And the MBMS multiplexing service data of multiplexing process, corresponding multiplexing control information are handed down to UE with relevant MBMS_ID information by MCCH.
5) each UE is on physical layer, and UE_X only demodulates business datum S1 according to MBMS_ID information of being correlated with and corresponding multiplexing control information in MBMS multiplexing service data, S2 and S3, and report the high-rise processing that continues; UE_Y only demodulates business datum S2 and S3 according to MBMS_ID information of being correlated with and corresponding multiplexing control information in MBMS multiplexing service data, and reports the high-rise processing that continues; UE_Z only demodulates business datum S4 according to MBMS_ID information of being correlated with and corresponding multiplexing control information in MBMS multiplexing service data, and reports the high-rise processing that continues.
In sum, behind the multiplexing method and Deplexing method of the broadcast and multicast service data that employing the present invention proposes, with respect to the scheme of different MBMS business datums being carried out multiplexing process in the MAC layer that proposed in the former WCDMAR6 version, the advantage that has is as follows:
1.UE the physical layer of end only needs to demodulate user's interest (or having subscribed to) MBMS business datum, report the high-rise processing that continues and needn't demodulate a large amount of unwanted MBMS business datums, thereby for UE, reached the purpose of conserve power consumption.
2. the physical layer of network side can be according to the different demands of different MBMS business to BER, being respectively every kind of MBMS business datum selects respective coding and modulation system that it is encoded and modulation treatment, thereby solved the contradictory problems of MBMS performance of services and Radio Resource utilization ratio, guaranteed the balance between MBMS performance of services and the wireless resource utility efficiency preferably.
Because next generation mobile communication system (as the mobile communication system that adopts the OFDM technology etc.) in the MBMS transmission business procedure, can the UE of different transmission bandwidth abilities be supported, the wherein RAN28 meeting of LTE decision: the transmission bandwidth from 1.25MHz to 20MHz will be used by next generation mobile communication system, that is to say, in same communication system, have the UE that supports different transmission bandwidth abilities and exist, and the UTRAN system needs to connect with the UE of different transmission bandwidth abilities respectively.After adopting the present invention program like this, different UE receives only the MBMS business datum that demodulation oneself can be supported in physical layer, the UE that therefore can guarantee to have different transmission bandwidth abilities can receive the MBMS business datum of self, has effectively solved the reception problem of the UE of different transmission bandwidth abilities to the MBMS business.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (20)

1. the multiplexing method of a broadcast and multicast service data is characterized in that, comprises step:
Each broadcast and multicast service data after network side is handled MAC layer is sent to physical layer;
According to multiplexing control information each broadcast and multicast service data is carried out multiplexing process by physical layer; And
Broadcast group broadcast multiplexing service data and the corresponding multiplexing control information of network side after with multiplexing process is handed down to user terminal respectively.
2. the method for claim 1 is characterized in that, the process of each broadcast and multicast service data being carried out multiplexing process by physical layer comprises:
Network side carries out chnnel coding in physical layer respectively to each broadcast and multicast service data to be handled; And
Each broadcast and multicast service data after according to multiplexing control information chnnel coding being handled is modulated and multiplexing process.
3. method as claimed in claim 2 is characterized in that, by MAC layer the processing that each broadcast and multicast service data carries out is comprised:
The priority orders of the broadcast and multicast service data that network side issues according to each preparation in MAC layer, the broadcast and multicast service data that each preparation is issued is dispatched processing successively; And
For the broadcast and multicast service data after each scheduling processing distributes corresponding transformat.
4. method as claimed in claim 3, it is characterized in that, the transformat that network side is assigned with in MAC layer according to each broadcast and multicast service data in physical layer is selected corresponding channel coding method that each broadcast and multicast service data is carried out chnnel coding respectively and is handled.
5. as claim 3 or 4 described methods, it is characterized in that the Block Error Rate demand of the broadcast and multicast service data that network side issues according to each preparation in MAC layer is respectively each broadcast and multicast service data and distributes corresponding transformat.
6. method as claimed in claim 2 is characterized in that, network side is modulated each broadcast and multicast service data and the process of multiplexing process specifically comprises in physical layer:
Network side each broadcast and multicast service data after physical layer is handled chnnel coding respectively carries out corresponding modulation treatment; And
Carry out multiplexing process according to multiplexing control information each broadcast and multicast service data after to modulation treatment.
7. method as claimed in claim 2 is characterized in that, network side is modulated each broadcast and multicast service data and the process of multiplexing process specifically comprises in physical layer:
Network side each broadcast and multicast service data after physical layer is handled chnnel coding according to multiplexing control information carries out multiplexing process; And
Broadcast group broadcast multiplexing service data after the multiplexing process are carried out modulation treatment.
8. as claim 1,6 or 7 described methods, it is characterized in that network side carries out multiplexing process according to following at least a multiplex mode to each broadcast and multicast service data in physical layer:
The code division multiplexing mode;
The frequency division multiplexing mode; And
Time division multiplexing mode.
9. as claim 1,6 or 7 described methods, it is characterized in that described network is the OFDM networks system.
10. method as claimed in claim 9 is characterized in that, network side carries out multiplexing process according to following at least a multiplex mode to each broadcast and multicast service data in physical layer:
Frequency division multiplexing mode in the frame;
Time division multiplexing mode in the frame;
Multiplex mode at random in the frame; And
The interframe time division multiplexing mode.
11. the method for claim 1 is characterized in that, comprises that also the pairing broadcasting multicast service identifier of broadcast and multicast service data that network side issues each preparation is handed down to the step of user terminal.
12. method as claimed in claim 11, it is characterized in that, network side in physical layer with the part of each broadcasting multicast service identifier as corresponding broadcast and multicast service data, multiplexing in the multiplexing service data of each broadcast and multicast service data, be handed down to user terminal in the lump with broadcast group broadcast multiplexing service data.
13. method as claimed in claim 11 is characterized in that, pairing broadcasting multicast service identifier of broadcast and multicast service data that network side issues each preparation and multiplexing control information are carried in the lump and are handed down to user terminal in the broadcast multicase control information.
14. method as claimed in claim 13 is characterized in that, network side is handed down to user terminal with multiplexing control information by one of following manner:
Be handed down to user terminal by broadcast multicast service control channel;
Be handed down to user terminal by Broadcast Control Channel;
Multiplexing control information and broadcast group broadcast multiplexing service data are handed down to user terminal by the broadcasting multicast service channel in the lump.
15. the Deplexing method of a broadcast and multicast service data is characterized in that, comprises step:
User terminal obtains the multiplexing control information that is used for the broadcast and multicast service data multiplexing process that network side issues in the physical layer demodulation; And
The broadcasting multicast service identifier of each broadcast and multicast service data in the broadcast group broadcast multiplexing service data that user terminal receives and demodulation map network side issues; And
In the broadcast group broadcast multiplexing service data that network side issues, discern relevant broadcast and multicast service data according to each broadcasting multicast service identifier that demodulation obtains;
Based on the multiplexing control information that demodulation obtains, only the relevant broadcast and multicast service data that identifies is carried out demultiplexing and demodulation process in physical layer.
16. method as claimed in claim 15 is characterized in that, user terminal demodulates the pairing broadcasting multicast service identifier of each broadcast and multicast service data the broadcast group broadcast multiplexing service data that physical layer issues from network side.
17. method as claimed in claim 15 is characterized in that, user terminal demodulates the pairing broadcasting multicast service identifier of each broadcast and multicast service data in physical layer from the broadcast multicase control information that network side issues.
18. method as claimed in claim 15 is characterized in that, user terminal specifically comprises the process that the relevant broadcasts multi-cast business data carries out demultiplexing and demodulation process:
Each broadcasting multicast service identifier that user terminal obtains according to demodulation, the relevant broadcasts multi-cast business data in the broadcast group broadcast multiplexing service data that the recognition network side issues; And
Only the broadcast and multicast service data that recognizes is carried out the demultiplexing processing according to the multiplexing control information that demodulation obtains in physical layer; And
Each broadcast and multicast service data after the demultiplexing processing is carried out demodulation process respectively.
19. method as claimed in claim 15 is characterized in that, user terminal specifically comprises the process that the relevant broadcasts multi-cast business data carries out demultiplexing and demodulation process:
Each broadcasting multicast service identifier that user terminal obtains according to demodulation, the relevant broadcasts multi-cast business data in the broadcast group broadcast multiplexing service data that the recognition network side issues; And
Only the broadcast and multicast service data that recognizes is carried out demodulation process in physical layer; And
The broadcast group broadcast multiplexing service data of the multiplexing control information that obtains according to demodulation after to demodulation process are carried out demultiplexing and are handled.
20., it is characterized in that described relevant broadcasts multi-cast business data is as claim 15,18 or 19 described methods:
The user's interest broadcast and multicast service data; Or
The broadcast and multicast service data that the user has subscribed to.
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