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WO2007082431A1 - Procédé de multiplexage et démultiplexage de données de service diffusées en multidiffusion - Google Patents

Procédé de multiplexage et démultiplexage de données de service diffusées en multidiffusion Download PDF

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Publication number
WO2007082431A1
WO2007082431A1 PCT/CN2006/002684 CN2006002684W WO2007082431A1 WO 2007082431 A1 WO2007082431 A1 WO 2007082431A1 CN 2006002684 W CN2006002684 W CN 2006002684W WO 2007082431 A1 WO2007082431 A1 WO 2007082431A1
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WIPO (PCT)
Prior art keywords
broadcast multicast
service data
multicast service
multiplexing
network side
Prior art date
Application number
PCT/CN2006/002684
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English (en)
Chinese (zh)
Inventor
Yingzhe Ding
Original Assignee
Huawei Technologies Co., Ltd.
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Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007082431A1 publication Critical patent/WO2007082431A1/fr

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Classifications

    • 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. Transmission Power Control [TPC] 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 leader and terminal is follower
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower 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

Definitions

  • the present invention relates to the field of broadcast multicast service technologies in the third generation mobile communication system and the next generation mobile communication system, and more particularly to a method for multiplexing broadcast multicast service data and a corresponding demultiplexing method thereof.
  • the third generation mobile communication system introduces the concept of multicast and broadcast, which is a technology for transmitting the same data from one data source to multiple targets. Therefore, WCDMA/GSM Global Standards Organization 3GPP proposes Multimedia Broadcast/Multicast Service (MBMS), which is a point in the mobile communication network that provides a data source to send the same data to multiple users.
  • MBMS Multimedia Broadcast/Multicast Service
  • To multi-point services to achieve network resource sharing, improve the utilization of network resources, especially the utilization of air interface resources.
  • the MBMS service proposed by 3GPP can not only realize multicast and broadcast of plain text low-rate message-type services, but also realize multicast and broadcast of high-rate multimedia services.
  • the network side can simultaneously transmit multiple different MBMS services; for the user equipment (UE, User Equipment) that receives the MBMS service, according to whether it subscribes to the MBMS service and its own receiving capability. Select whether to receive the MBMS service, that is, if the UE subscribes to the MBMS service and has the capability of receiving the MBMS service, Then, the MBMS service is received, otherwise it is not received.
  • UE User Equipment
  • FIG. 1 a schematic diagram of a receiving state of a corresponding MBMS service in a case where four different MBMS services are simultaneously transmitted by an existing network side, where the network side simultaneously transmits four different MBMS services at one time;
  • X has already subscribed to service 1 and service 2 (S1 and S2) in advance, and user X only receives the processing of S1 and S2 services, and does not receive the other two services delivered by the network side, that is, the other two services. (S3 and S4) No reception processing is performed.
  • the UE selectively receives multiple MBMS services delivered by the network side according to the situation of subscribing to the MBMS service, for no subscription. For the MBMS service, the UE may not receive the processing, thereby reducing the power consumption of the UE.
  • the network side performs multiplexing processing on multiple different MBMS services, so that how to perform multiple different MBMS services is performed. Reuse processing has become a research hotspot in the field of MBMS technology.
  • the related MBMS service transmission and multiplexing technology has been proposed. Due to the limitation of the original version at the time, the multiplexing process of multiple MBMS services can only be performed at the media access control layer (MAC, Media Access). Control ) is done in the layer. In order to transmit the MBMS service, the MAC-m protocol structure needs to be added to the MAC layer on the UTRAN side and the UE side respectively to perform multiplexing and transmission processing on the MBMS service.
  • MAC media access control layer
  • FIG. 2 a schematic diagram of a process of multiplexing multiple MBMS services by using the MAC-m protocol structure on the existing UTRAN side.
  • different MBMS services enter the MAC-m of the system through their respective MBMS logical channels.
  • MAC-m will add the corresponding MBMS_ID (MBMS service identification number) for each MBMS service, then multiplex the multiple MBMS services, and then schedule the multiplexed service data, and finally, after the scheduling process.
  • the business data is selected to be transmitted to the physical layer in the corresponding transport format.
  • FIG. 3 a schematic diagram of a process of demultiplexing the received MBMS multiplexing service by the MAC-m protocol structure of the existing UE side, and the physical layer of the UE demodulates the received MBMS multiplexing.
  • the service data is transmitted to the MAC-m
  • the MAC-m on the UE side will be physical.
  • the MBMS complex reported by the layer is demultiplexed with the service to obtain the MBMS-ID of each MBMS service, so that the UE can report the MBMS service subscribed to by itself according to the MBMSJtD information obtained by the MAC-m demultiplexing process.
  • the higher layer continues to process, and the unsubscribed MBMS service is discarded.
  • the existing network side performs multiplexing processing on multiple MBMS service data, and the UE selects corresponding MBMS service data in the MBMS multiplexed service data according to the MBMS service situation of the UE.
  • the network side multiplexes the low-rate MBMS service data (such as the Text service data) and the high-rate MBMS service data (such as the Video service data)
  • the UE only wants to receive low
  • the MBMS service data of the rate also requires the physical layer to spend a lot of power to demodulate the high-rate service data in the MBMS multiplexed service data.
  • the UE physical layer demodulates the high rate rate MBMS service data. It does not make any sense, so that the process of demodulating the MBMS service data of the meaning by the UE physical layer will consume too much power of the UE.
  • the error rate (BER, Bit Error Rite) required for different MBMS service data in the code modulation process is also Not the same, as required to download files and voice and video streams
  • the required BER flag is different.
  • the BER requirements for video and audio are 10E-3, while the BER for downloading files or software is 10E-6.
  • the network side multiplexes different MBMS service data in the MAC layer the same channel coding mode and modulation mode must be adopted in the physical layer for different MBMS service data with different BER requirements, so if each is to be guaranteed
  • the service performance requirements of the multiplexed MBMS service will result in a decrease in the utilization of the radio resources. If the utilization of the radio resources is to be ensured, the service performance requirements of the partially multiplexed MBMS services cannot be guaranteed.
  • next-generation mobile communication system such as the Long Term Evolution (LTE)
  • LTE Long Term Evolution
  • an OFDM system is being developed, which will support different UEs to receive MBMS services delivered by the network side based on different transmission bandwidths. Data, so if the network side multiplexes multiple different MBMS service data at the MAC layer, it will increase the transmission bandwidth of the MBMS service data, which may result in the UE with low transmission bandwidth capability not receiving the corresponding data.
  • MBMS business For example, the network side sends the MBMS service 1 (S1) and the MBMS service 2 (S2).
  • the transmission service S1 needs to occupy the transmission bandwidth of 3 MHz
  • the transmission service S2 needs to occupy the transmission bandwidth of 5 MHz
  • the two MBMSs to be delivered by the network side.
  • the services (81 and 82) are multiplexed at the MAC layer, and the transmission bandwidth of 8 MHz is transmitted; thus, when the transmission bandwidth capability of the UE1 that subscribes only to the MBMS service 1 (S1) is 5 MHz, the physical The layer can only see an 8MHz transmission bandwidth service flow, which has exceeded its own transmission bandwidth capacity of 5MHz, so it will not be able to receive the MBMS service data delivered by the network side, and thus will not receive the MBMS service 1 of its own subscription. (S1) data. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a method for multiplexing broadcast multicast service data and a method for demultiplexing the same, so as to reduce the power consumption required by the UE for demodulating and multiplexing data, and ensure that UEs with different transmission bandwidths are guaranteed. It can receive the required broadcast multicast service and balance the relationship between broadcast multicast service performance and radio resource utilization.
  • a method for multiplexing broadcast multicast service data includes the following steps:
  • the network side transmits the data of each broadcast multicast service processed by the media access control layer to the physical layer;
  • the physical layer performs multiplexing processing on each broadcast multicast service data according to the multiplexing control information.
  • the process of performing multiplexing processing on each broadcast multicast service data by the physical layer includes: performing, by the network side, channel coding processing on each broadcast multicast service data at the physical layer respectively; and performing channel coding processing according to the multiplexing control information.
  • Each broadcast multicast service data is modulated and multiplexed.
  • the method further includes the step of the network side transmitting the multiplexed broadcast multicast multiplexed service data and the corresponding multiplexed control information to the user terminal respectively.
  • the processing performed by the media access control layer on each broadcast multicast service data includes: the network side in the media access control layer, according to the priority order of each broadcast multicast service data to be delivered, sequentially prepares each to be delivered. Broadcast multicast service data for scheduling processing; and
  • a corresponding transmission format is allocated for each scheduled broadcast multicast service data.
  • the network side performs channel coding processing on each broadcast multicast service data according to a transmission format allocated by the media access control layer according to each broadcast multicast service data in the physical layer.
  • the network side allocates a corresponding transmission format for each broadcast multicast service data in the media access control layer according to the block error rate requirement of each broadcast multicast service data to be delivered.
  • the process of the network side modulating and multiplexing the broadcast multicast service data at the physical layer specifically includes:
  • the network side performs corresponding modulation processing on each broadcast multicast service data after channel coding processing at the physical layer respectively;
  • the respective broadcast multicast service data after the modulation processing is multiplexed according to the multiplexing control information.
  • the process of the network side modulating and multiplexing the broadcast multicast service data at the physical layer includes: The network side performs multiplexing processing on each broadcast multicast service data after the channel coding process in the physical layer data multiplexing control information;
  • the multiplexed broadcast multicast multiplexed service data is modulated.
  • the network side performs multiplexing processing on each broadcast multicast service data in the physical layer according to at least one multiplexing manner as follows:
  • the network is an orthogonal frequency division multiplexing network system. Then, the network side performs multiplexing processing on each broadcast multicast service data in the physical layer according to at least one multiplexing manner as follows:
  • the method further includes the step of the network side transmitting the broadcast multicast service identification number corresponding to each of the broadcast multicast service data to be delivered to the user terminal.
  • the network side uses each broadcast multicast service identification number as a component of the corresponding broadcast multicast service data at the physical layer, and multiplexes it in the multiplexed service data of each broadcast multicast service data, and broadcasts multicast.
  • the multiplexed service data is sent to the user terminal.
  • the network side carries the broadcast multicast service identification number corresponding to each of the broadcast multicast service data that is to be delivered, and the multiplex control information, in the broadcast multicast control information, and sends the information to the user terminal.
  • the network side sends the multiplexed control information to the user terminal in one of the following manners: the broadcast multicast service control channel is sent to the user terminal;
  • the multiplex control information and the broadcast multicast multiplexed service data are sent to the user terminal through the broadcast multicast service channel.
  • a method for demultiplexing broadcast multicast service data includes the following steps:
  • the user terminal demodulates at the physical layer to obtain multiplexing control information for the multicast processing of the broadcast multicast service data delivered by the network side;
  • the method further comprises the steps of:
  • the user terminal receives and demodulates the broadcast multicast service identification number of each broadcast multicast service data corresponding to the broadcast multicast multiplexed service data delivered by the network side;
  • the broadcast multicast service data is identified in the broadcast multicast multiplexing service data sent by the network side according to each broadcast multicast service identification number obtained by the demodulation.
  • the user terminal demodulates the broadcast multicast service identification number corresponding to each broadcast multicast service data in the broadcast multicast multiplex service data sent by the physical layer from the network side.
  • the user terminal demodulates the broadcast multicast service identification number corresponding to each broadcast multicast service data in the broadcast multicast control information sent by the physical layer from the network side.
  • the process of demultiplexing and demodulating the related broadcast multicast service data by the user terminal specifically includes:
  • the user terminal identifies, according to each broadcast multicast service identification number obtained by the demodulation, the related broadcast multicast service data in the broadcast multicast multiplexing service data delivered by the network side;
  • Demodulation processing is performed on each broadcast multicast service data after the demultiplexing process.
  • the process of demultiplexing and demodulating the related broadcast multicast service data by the user terminal specifically includes:
  • the user terminal identifies, according to each broadcast multicast service identification number obtained by the demodulation, the related broadcast multicast service data in the broadcast multicast multiplexing service data delivered by the network side;
  • the related broadcast multicast service data is: broadcast multicast service data that is of interest to the user; or broadcast multicast service data that the user has subscribed to.
  • the solution of the present invention proposes that the network side multiplexes multiple broadcast multicast service data at the physical layer, and proposes that the UE demodulates the information of interest in the broadcast multicast multiplex service data sent by the network layer only from the network side.
  • Business data which can be achieved:
  • the physical layer of the UE only needs to demodulate the service data that the user is interested in (or has subscribed to), and does not have to demodulate a large amount of unnecessary service data and report it to the upper layer for further processing, thereby achieving savings for the UE.
  • the physical layer on the network side can separately address the BLER requirements of different broadcast multicast services, thereby solving the contradiction between the performance of the broadcast multicast service and the utilization efficiency of the radio resources, and better guarantees the performance of the service and a balance between wireless resource utilization;
  • next generation mobile communication system (such as a mobile communication system using OFDM technology) can support UEs with different transmission bandwidth capabilities in the process of transmitting broadcast multicast services
  • different UEs are The physical layer can only receive the service data that can be supported by the demodulation. Therefore, the UE with different transmission bandwidth capability can receive its own broadcast multicast service data, which effectively solves the problem of the broadcast multicast service of the UE with different transmission bandwidth capabilities. Receive questions. DRAWINGS
  • FIG. 1 is a schematic diagram of a receiving state of a user's corresponding MBMS service in the case where four different MBMS services are simultaneously transmitted by the existing network side;
  • FIG. 2 is a schematic diagram of a process of multiplexing multiple MBMS services by using a MAC-m protocol structure on the existing UTRAN side;
  • 3 is a schematic diagram of a process of demultiplexing a received MBMS multiplexing service by using a MAC-m protocol structure of an existing UE side
  • 4 is a schematic diagram of a process of selecting a corresponding MBMS service data in an MBMS multiplexed service data according to a MBMS service situation of the MBMS service data that is transmitted by the existing network side;
  • FIG. 5 is a flowchart of a main implementation principle of a method for multiplexing broadcast multicast service data according to the present invention
  • FIG. 6 is a schematic diagram of performing intra-frame FDM multiplexing processing on three different broadcast multicast service data at a physical layer in an OFDM system. State diagram
  • FIG. 7 is a schematic diagram of a multiplexing state of performing intra-frame TDM multiplexing processing on three different broadcast multicast service data at a physical layer in an OFDM system;
  • FIG. 8 is a schematic diagram of a multiplexing state in which an intra-frame Scattered multiplexing process is performed on three different broadcast multicast service data at a physical layer in an OFDM system;
  • FIG. 9 is a schematic diagram of a multiplexing state in which an inter-frame TDM multiplexing process is performed on three different broadcast multicast service data at a physical layer in an OFDM system;
  • FIG. 10 is a flowchart of a main implementation principle of a method for demultiplexing broadcast multicast service data according to the present invention
  • FIG. 11 is a schematic diagram of a main implementation process for multiplexing a MBMS service according to an embodiment of the present invention
  • the power consumption of the UE is increased, the performance of the MBMS service and the utilization of the radio resources are not well balanced, and it is not applicable.
  • the UEs with different transmission bandwidth capabilities can receive the limitations of the MBMS service.
  • the present invention proposes a broadcast multicast service data multiplexing method and a corresponding demultiplexing method thereof that can completely avoid the above problems.
  • Step S10 the network side (the network mentioned here may be a third-generation mobile communication system supporting the capability of the broadcast multicast service, such as a WCDMA network system, etc.; and may also be a next-generation mobile communication system supporting the capability of the broadcast multicast service, such as An OFDM network system or the like) transmits the broadcast multicast service data processed by the MAC layer to the physical layer;
  • the network side may perform scheduling processing on each broadcast multicast service data to be delivered in sequence according to the priority order of the broadcast multicast service data to be delivered in the MAC layer, and then perform broadcast processing for each scheduling process.
  • the transport format TF corresponding to the multicast service data allocation where the MAC layer can separately generate the broadcast multicast service data according to the block error rate (BLER) of each broadcast multicast service data to be delivered.
  • BLER block error rate
  • the corresponding transport format TF is allocated, and then each broadcast multicast service data to which the transport format TF is allocated is transmitted from the MAC layer to the physical layer through the respective transport channels.
  • Step S20 The physical layer performs corresponding multiplexing processing on each broadcast multicast service data according to the corresponding multiplexing control information.
  • the process of performing multiplexing processing on each broadcast multicast service data by the physical layer is as follows:
  • the network side performs channel coding, symbol interleaving, and the like for each broadcast multicast service data at the physical layer, and the physical layer may allocate a transmission format TF at the MAC layer according to each broadcast multicast service data, respectively. Broadcasting the multicast service data to select a corresponding channel coding mode, to perform corresponding channel coding, symbol interleaving, and the like;
  • the network side modulates and multiplexes the broadcast-multicast service data processed by the channel coding process according to the corresponding multiplexing control information at the physical layer.
  • the network side can perform channel coding processing in the physical layer in two ways.
  • the subsequent broadcast multicast service data is modulated and multiplexed, as follows:
  • the first type If each broadcast multicast service data to be delivered by the network side is based on different channel coding modes and modulation modes, the network side first performs each channel broadcast coded data for each broadcast multicast service data at the physical layer. Corresponding modulation processing;
  • the modulated broadcast multicast service data is multiplexed according to the corresponding multiplexing control information.
  • the second type If the broadcast multicast service data to be delivered by the network side is based on the same channel coding mode and modulation mode, the network side may firstly use the corresponding multiplex control information for each channel after the channel coding process. Multicast service data is multiplexed;
  • the multiplexed processed broadcast multicast multiplexed service data is subjected to unified modulation processing.
  • the physical layer may directly perform multiplexing processing on each broadcast multicast service data, and then reuse the data.
  • the processed multiplexed service data performs unified channel coding processing and modulation processing.
  • the network side may adopt a Code Division Multiplexing (CDM), a Frequency Division Multiplexing (FDM) method, or a Time Division Multiplexing (TDM) at the physical layer.
  • CDM Code Division Multiplexing
  • FDM Frequency Division Multiplexing
  • TDM Time Division Multiplexing
  • the network side may adopt the following multiplexing manners for each broadcast multicast in the physical layer.
  • Business data is multiplexed:
  • Intra-frame FDM Intra-frame frequency division multiplexing
  • Figure 6 is a multiplexing state for intra-frame FDM multiplexing processing of three different broadcast multicast service data at the physical layer in an OFDM system.
  • a schematic diagram that is, different broadcast multicast service data is simultaneously transmitted in one subframe, and each broadcast multicast service data occupies different subcarriers respectively;
  • Intra-frame time division multiplexing mode is a schematic diagram of a multiplexing state for performing intra-frame TDM multiplexing processing on three different broadcast multicast service data at the physical layer in an OFDM system. That is, different broadcast multicast service data is simultaneously transmitted in one subframe, and each broadcast multicast service data respectively occupies different OFDM symbols;
  • Intra-frame Scattered Multiplexing is a schematic diagram of the multiplexing state of intra-Scattered multiplexing processing on three different broadcast multicast service data at the physical layer in the OFDM system. That is, different broadcast multicast service data is simultaneously transmitted in one subframe, and each broadcast multicast service data occupies different hopping patterns respectively; 4.
  • Inter-frame time division multiplexing mode is a schematic diagram of a multiplexing state for performing inter-frame TDM multiplexing processing on three different broadcast multicast service data at the physical layer in an OFDM system. That is, one subframe is only used to transmit one broadcast multicast service data, and different broadcast multicast service data respectively occupy different subframes.
  • the subsequent network side further sends the broadcast multicast multiplexed service data and the corresponding multiplexed control information that are processed by the physical layer to the UE, where the network side can pass the multiplexed control information to the broadcast multicast service control channel (
  • the MCCH, MBMS Control Channel is sent to the UE, and the multiplex control information can be sent to the UE through the Broadcast Control Channel (BCCH), and the multiplex control information and the broadcast multicast multiplexed service data can also be used. It is sent to the UE through the broadcast multicast service channel (MTCH, MBMS Traffic Channel).
  • the network side In order to facilitate the subsequent UEs to find the broadcast multicast service data that they are interested in or subscribed to in the broadcast multicast multiplexed service data sent by the network, the network side also needs to broadcast each broadcast multicast service data.
  • the corresponding broadcast multicast service identification number (broadcast multicast service ID) is sent to the UE, where the network side can use each broadcast multicast service identification number as a component of the corresponding broadcast multicast service data at the physical layer.
  • the multiplexed service data of each broadcast multicast service data is multiplexed with the broadcast multicast multiplexed service data and sent to the UE; and the network side can also correspond to each broadcast multicast service data to be delivered.
  • the broadcast multicast service identification number and the multiplex control information are carried in the broadcast multicast control information and sent to the UE.
  • the above-mentioned broadcast multicast service mentioned in the multiplexing method of the broadcast multicast service data of the present invention may be, but not limited to, a multimedia broadcast multicast service MBMS.
  • the present invention also correspondingly proposes a method for demultiplexing broadcast multicast service data, as shown in FIG. 10, which is the broadcast multicast of the present invention.
  • the main implementation principle flow chart of the demultiplexing method of business data, the main implementation process is as follows:
  • Step S100 The UE first demodulates at the physical layer to obtain multiplexing control information that is sent by the network side for broadcast multicast service data multiplexing processing.
  • Step S200 the UE is based on the demodulation obtained by the demodulation, and only the network is in the physical layer.
  • the related broadcast multicast service data in the broadcast multicast multiplexing service data sent by the side is demultiplexed and demodulated correspondingly, and the related broadcast multicast service data may be, but not limited to, broadcast multicast interested in the user. Service data, or broadcast multicast service data that the user has subscribed to.
  • the UE may use the broadcast multicast service identification number of each broadcast multicast service data corresponding to the broadcast multicast multicast service data delivered by the network side, and identify the sense in the broadcast multicast multiplexing service data sent by the network side.
  • Interested (or already subscribed) broadcast multicast service data wherein the UE can demodulate the broadcast multicast corresponding to each broadcast multicast service data in the broadcast multicast multiplex service data delivered by the physical layer from the network side
  • the service identification number may also be used to demodulate the broadcast multicast service identification number corresponding to each broadcast multicast service data in the broadcast multicast control information sent by the physical layer from the network side.
  • the process of demultiplexing and demodulating the broadcast multicast service data of interest by the UE can be implemented in two ways, as follows:
  • the first type the UE first identifies, according to each broadcast multicast service identification number obtained by the demodulation, the broadcast multicast service data of interest (or already subscribed) in the broadcast multicast multiplex service data delivered by the network side;
  • the UE performs demultiplexing processing only on the identified broadcast multicast service data at the physical layer according to the multiplexed control information obtained by the demodulation;
  • the UE finally performs demodulation processing on each of the broadcast multicast service data after the demultiplexing process.
  • the second type the UE first identifies, according to each broadcast multicast service identification number obtained by the demodulation, the broadcast multicast service data of interest (or already subscribed) in the broadcast multicast multiplex service data delivered by the network side;
  • the UE performs demodulation processing only on the identified broadcast multicast service data at the physical layer
  • the UE further performs demultiplexing processing on the demodulated broadcast multicast multiplexed service data according to the multiplexed control information obtained by the demodulation.
  • the above-mentioned broadcast multicast service mentioned in the demultiplexing method of the broadcast multicast service data of the present invention may be, but not limited to, a multimedia broadcast multicast service MBMS.
  • the method for multiplexing broadcast multicast service data and the corresponding demultiplexing method proposed by the present invention is to design an MBMS service (here, an MBMS service is taken as an example for description.
  • the multiplexing process of other broadcast multicast services is also transferred from the original MAC layer to the physical layer, that is, the multiplexing process of the MBMS service is moved from the L2 layer to the L1 layer. As shown in FIG.
  • FIG. 11 a schematic diagram of a main implementation process of multiplexing processing of an MBMS service according to the solution of the present invention, wherein in the MAC layer, the multiplexing process of the MBMS service and the process of adding the MBMS service identification number (MBMSJD) are left, leaving only The scheduling process of the lower MBMS service and the process of selecting the corresponding transmission format for the MBMS service; at the physical layer, the multiplexing process of the MBMS service is increased.
  • the MAC layer first performs scheduling processing on each MBMS service according to the priority relationship of each MBMS service, and then according to the required block error rate of each scheduled MBMS service (
  • the BLER feature assigns a corresponding transport format TF to it; the physical layer performs channel coding and symbol interleaving for each MBMS service, and then modulates and multiplexes it onto the physical channel for transmission.
  • the physical layer of the UE only demodulates the MBMS service data of interest (or already subscribed) in the MBMS multiplexed service data sent by the network side according to the multiplex control information, and ignores other ills.
  • the MBMS service data of interest (or no subscription) is further reported to the upper layer for processing.
  • the network side when the network side performs multiplexing processing on multiple MBMS service data at the physical layer, it may adopt, for example, code division multiplexing (CDM), frequency division multiplexing (FDM), or time division multiplexing (TDM).
  • CDM code division multiplexing
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • the MBMS-ID information corresponding to each MBMS service can be transmitted in two ways: One is to increase the pair when the physical layer multiplexes each MBMS service data.
  • the multiplexing of the MBMS-ID causes the MBMSJD to be sent along with the MBMS service data, so that at the receiving end UE side, each MBMS-ID is first demodulated in the MBMS multiplexed service data, and then the corresponding needs are demodulated according to the MBMSJD information.
  • MBMS service data another method is to transmit the MBMS-ID and the multiplex control information simultaneously in the MBMS control information, so that the UEMS on the receiving end first demodulates the corresponding MBMS_ID from the MBMS control information. And according to the MBMSJD, the corresponding required MBMS service data is demodulated.
  • the network side carries MBMSJD and multiplexing control information simultaneously in MBMS control.
  • the information is sent together, and the network side performs multiplexing processing on multiple MBMS service data at the physical layer, and the UE side physical layer demodulates the MBMS service data that is of interest to the UE layer as follows:
  • the MAC-m layer sequentially performs scheduling processing on each MBMS service data according to the priority relationship between the MBMS service data, and selects a corresponding transmission format TF for each MBMS service data, for example, according to different MBMS service data.
  • the requirements for the BLER are different, and different TFs are selected for different MBMS service data, and then the processed MBMS service data is transmitted to the physical layer through the transmission channel;
  • the physical layer of the system multiplexes and processes each MBMS service data on the physical channel according to the corresponding multiplexing control information
  • the multiplex control information used by the UE may be sent to the UE through the MCCH channel, or may be sent to the UE through the BCCH channel, or may be sent along with the MBMS multiplexed service data, but the control information is multiplexed.
  • the transport format TF and the location information of the occupied time-frequency resources are well known to the UTRAN and the UE.
  • the multiplexing method and the demultiplexing method of the broadcast multicast service data proposed by the present invention are combined with the MBMS service as an example to enumerate an embodiment.
  • the line elaborates.
  • the physical layer adopts OFDM technology, and the communication transmission bandwidth supported by Node B is 20 MHz.
  • the transmission bandwidth capability of UE-X is 20 MHz, UE-Y.
  • the transmission bandwidth capability is 10MHz, and the transmission bandwidth capability of UE-Z is 5MHz.
  • BMS services there are four different BMS services to be sent in the system, namely SI, S2, S3 and S4, and each MBMS service needs to occupy 5MHz respectively. Transmission bandwidth.
  • the UE UE_X subscribes to the SI, S2 and S3 services
  • the UE_Y subscribes to the S2 and S3 services
  • the UE-Z subscribes to the S4 service.
  • the multiplexing process of the services SI, S2, S3, and S4 and the demultiplexing process of the corresponding services by different UEs are as follows:
  • MBMS services SI, S2, S3 and S4 enter the MAC-m layer of the system through their respective MBMS logical channels;
  • the MAC-m performs scheduling processing on the services S1, S2, S3 and S4 according to the priority order between the MBMS services SI, S2, S3 and S4 (assuming that the system resources are sufficient, and four MBMS services can be simultaneously transmitted) And according to the service SI, S2, S3 and S4 respectively, the demand for the BLER, the corresponding transmission format TF is selected for each service in turn, and then the processed services S1, S2, S3 and S4 are transmitted to the physical through the transmission channel.
  • Floor
  • the physical layer of the system performs channel coding and symbol modulation on the services Sl, S2, S3 and S4 according to the corresponding transmission format TF selected by the MAC-m layer for the services SI, S2, S3 and S4;
  • the physical layer of the system is corresponding to the multiplexing control information, and the four MBMS service data are multiplexed at the physical layer; where the transmission bandwidth of each MBMS service is used and the user subscribes to the MBMS service,
  • the services shown in FIG. 12 are multiplexed with services S1, S2, S3, and S4, as shown in FIG. 12, in which services S2 and S3 are multiplexed in a 10 MHz transmission bandwidth by using a scattered multiplexing method.
  • services S1 and S4 are respectively multiplexed by FDM multiplexing;
  • the multiplexed MBMS multiplexed service data, the corresponding multiplexed control information, and the associated MBMS-ID information are sent to the UE through the MCCH.
  • Each ⁇ is on the physical layer
  • UE_X is based on the relevant MBMS__ID information and the corresponding complex
  • the control information only the service data SI, S2 and S3 are demodulated in the MBMS multiplexed service data, and reported to the upper layer for further processing; the UE-Y is multiplexed in the MBMS according to the related MBMS_ID information and the corresponding multiplex control information. Only the service data S2 and S3 are demodulated in the service data, and are reported to the upper layer for further processing; the UE-Z demodulates only the service in the MBMS multiplexed service data according to the related MBMS-ID information and the corresponding multiplex control information. Data S4 is reported to the higher layer for further processing.
  • the scheme for multiplexing different MBMS service data in the MAC layer is proposed in comparison with the previous WCDMA R6 version. , has the following advantages:
  • the physical layer of the UE only needs to demodulate the MBMS service data that is of interest (or already subscribed) by the user, and does not need to demodulate a large amount of unneeded MBMS service data and report it to the upper layer for further processing, thereby achieving The purpose of saving power consumption.
  • the physical layer on the network side can separate the different BER requirements of different MBMS services, thus solving the contradiction between the performance of the MBMS service and the utilization efficiency of the radio resources, and better guarantees the performance and radio resources of the MBMS service.
  • the balance between utilization can be used.
  • next-generation mobile communication system (such as mobile communication system using OFDM technology) can support UEs with different transmission bandwidth capabilities in the process of transmitting MBMS services
  • the RAN28 conference of LTE determines: from 1.25MHz to 20MHz.
  • the transmission bandwidth will be used by the next generation mobile communication system. That is to say, in the same communication system, there may be UEs supporting different transmission bandwidth capabilities, and the UTRAN system needs to be able to establish connections with UEs with different transmission bandwidth capabilities, respectively.
  • different UEs only receive and demodulate MBMS service data that can be supported by the UE at the physical layer, so that UEs with different transmission bandwidth capabilities can receive their own MBMS service data, effectively solving different transmissions.
  • the problem of bandwidth-capable UE receiving MBMS services The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

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

Abstract

L'invention porte sur un procédé de multiplexage de données diffusées en multidiffusion comportant les étapes suivantes: transmission par le réseau à la couche physique (S10) des données diffusées en multidiffusion traitées par la couche de gestion d’accès aux média; exécution par la couche physique du processus de multiplexage des données correspondantes de service diffusées en multidiffusion en fonction des informations (S20) de commande du multiplexage. L'invention porte également sur un procédé de démultiplexage de données diffusées en multidiffusion comportant les étapes suivantes: démodulation et obtention par l’UE de l’information de gestion du multiplexage utilisée pour le multiplexage des données de service diffusées en multidiffusion au niveau de la couche physique; et en suivant les informations de gestion du multiplexage, démultiplexage et démodulation au niveau de la couche physique simplement au moyen des données relatives de service diffusées en multidiffusion transmises par le réseau (S200). L’invention peut: réduire le gaspillage de la puissance requise par l’UE pour démoduler les données multiplexées; fournir à l’UE différentes largeurs de bande de transmission pour recevoir les services diffusés en multidiffusion requis; et équilibrer finement la relation entre les performances du service diffusé en multidiffusion, et utiliser la vitesse des ressources sans fil.
PCT/CN2006/002684 2006-01-16 2006-10-12 Procédé de multiplexage et démultiplexage de données de service diffusées en multidiffusion WO2007082431A1 (fr)

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CN102326420A (zh) * 2009-04-29 2012-01-18 上海贝尔股份有限公司 Mbms业务传输方法和设备
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CN109922517A (zh) * 2017-12-13 2019-06-21 成都鼎桥通信技术有限公司 一种降低组播终端功率的方法
CN109995434B (zh) * 2017-12-29 2020-09-08 华为技术有限公司 一种数据传输方法、通信设备及存储介质
CN111432470B (zh) * 2019-01-09 2023-04-07 成都鼎桥通信技术有限公司 应用层寻呼消息的处理方法和装置
CN113015181B (zh) * 2019-12-20 2022-07-29 北京华信泰科技股份有限公司 业务传输方法、装置及相关设备
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