WO2010015159A1 - Procédé de synchronisation entre des éléments de réseau d’un service de diffusion et de multidiffusion multimédia (mbms) au moyen du multiplexage de canal et son système correspondant - Google Patents

Procédé de synchronisation entre des éléments de réseau d’un service de diffusion et de multidiffusion multimédia (mbms) au moyen du multiplexage de canal et son système correspondant Download PDF

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Publication number
WO2010015159A1
WO2010015159A1 PCT/CN2009/071705 CN2009071705W WO2010015159A1 WO 2010015159 A1 WO2010015159 A1 WO 2010015159A1 CN 2009071705 W CN2009071705 W CN 2009071705W WO 2010015159 A1 WO2010015159 A1 WO 2010015159A1
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WIPO (PCT)
Prior art keywords
service
mbms
identifier
network element
mbms service
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PCT/CN2009/071705
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English (en)
Chinese (zh)
Inventor
艾建勋
姚翠峰
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中兴通讯股份有限公司
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Publication of WO2010015159A1 publication Critical patent/WO2010015159A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to a wireless communication technology, and in particular to a method and system for synchronizing MBMS (Multimedia Broadcast Multicast) service network elements of a multiplexed channel.
  • MBMS Multimedia Broadcast Multicast
  • the MBMS technology is proposed to achieve the most efficient use of mobile network resources. It refers to a point-to-multipoint service in which a data source sends data to multiple users, thereby realizing network resource sharing, including mobile core network and access network resource sharing, especially It is the sharing of air interface resources.
  • MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service multicast and broadcast, which undoubtedly conforms to the trend of future mobile data development.
  • MBSFN MBMS Single Frequency Network
  • the neighboring cells synchronously transmit the same wireless signal, and the UE (user equipment) can come from Signals from different base stations are considered multipath signals.
  • the public physical channel transmits the broadcast service to obtain a relatively large signal gain, thereby improving the Qos (Quality of Service) performance of the MBMS service.
  • a group of cells that simultaneously transmit MBMS service radio signals form an MBSFN synchronization area, and these cells are referred to as MBSFN cells.
  • the same MBMS service signal is synchronously transmitted in the cell in the MBSFN synchronization area.
  • FIG. 1 it is a logical architecture diagram of a master network element and a slave network element in the prior art.
  • the same master network element includes multiple slave network elements (subordinate network element 1 to slave network element N, N is a natural number). ).
  • the MBMS service is for the entire network, and the same MBMS service may be established on different subordinate network element nodes.
  • the following is a known networking method for synchronizing MBMS services between multiple network elements:
  • a group of NEs that need to send MBMS services synchronously are classified into a master network element and a slave network element, and are dependent on each other.
  • the synchronous transmission of the MBMS service is implemented by the cooperation between the network element and the main control network element.
  • the main control network element performs part or all of the user plane processing of the MBMS service data, and after the time stamp is marked, it is sent to
  • Each of the subordinate network elements performs the same processing on the MBMS service data at the specified time according to the timestamp information, so as to implement consistency in processing of the MBMS service data.
  • a master network element and one or more slave network elements may be the same network element in physical function, or may be different network elements, and are divided into a master control network element and a slave network element only for collaborative completion of the wireless interface.
  • the public control such a function is logically divided, that is, a plurality of identical or different physical network elements are divided into one master network element and several slave network elements according to logical functions. These network elements cooperate to implement the MBMS service in a multi-cell combination manner in the subordinate network element cell.
  • the master network element and the slave network element may be a combination of the following network elements, but are not limited to the following combinations:
  • the main control network element is the RNC (Radio Network Controller), and the subordinate network element. Is a subordinate RNC.
  • the interface between the master network element and the slave network element is the Iur interface.
  • the master network element and the slave network element are network elements with the same physical function.
  • the master network element is the RNC or the master NB+ (master NodeB + ), and the slave network element For the slave NB+ (slave NodeB + ), the interface between the master network element and the slave network element is the Iur interface.
  • the master network element and the slave network element are network elements with the same physical function but different logical functions.
  • the main control network element is MGW (Media Gate Way), MCE (Master Communication Equipment), and subordinate network.
  • MGW Media Gate Way
  • MCE Master Communication Equipment
  • the E-UTRAN NodeB is an M2 interface between the master network element and the slave network element.
  • a plurality of MBMSs multiplex the same channel
  • the channel referred to herein may be a transport channel or a physical channel.
  • multiple MBMS services can be mapped to The same transport channel, which is transport channel multiplexing; or, multiple MBMS services are mapped to the same or different transport channels, and these transport channels are mapped to the same physical channel, which is physical channel multiplexing.
  • data of multiple MBMS services may exist in the same transmission time interval, and the data is sent to the user terminal in a certain form through the wireless interface in the same transmission time interval.
  • the transmission channels and arrangements of the MBMS service mapping are different in different architectures, as follows:
  • the transport channel is FACH (Forward Access Channel), and MAC PDUs (Media Access Control Layer Protocol Data Units) of multiple services can be sent in the same transmission time interval of the same FACH channel.
  • FACH Forward Access Channel
  • MAC PDUs Media Access Control Layer Protocol Data Units
  • Different services are distinguished by the MBMS-ID field in the MAC PDU protocol header.
  • the transport channel is an MCH (Multicast Channel)
  • RLC PDUs of multiple MBMS services can be carried in a MAC PDU (Medium Access Control Layer Protocol Data Unit) of the same transmission time interval of the same MCH channel.
  • MAC PDU Medium Access Control Layer Protocol Data Unit
  • Different services are identified by logical channel identifiers (such as MBMS-ID, ie, multimedia broadcast multicast service identifiers) in the MAC PDU protocol header.
  • the time sequence in which the data elements of the different MBMS services are received by the different network elements is different, and the MBMS service data multiplexing of multiple MBMS services is processed by different network elements.
  • the manners of the transmission channels are different, so that the MBMS service radio signals of the cells under different network elements are not synchronized, causing interference between adjacent cells.
  • the technical problem to be solved by the present invention is to provide a method and system for synchronizing between multimedia broadcast multicast service network elements of a multiplexed channel, which can ensure MBMS service content between multiple network elements when the transmission channel of the MBMS service is multiplexed. Synchronize.
  • the present invention provides a method for synchronizing between multimedia broadcast multicast service network elements of a multiplex channel, including:
  • the slave network element receives the multimedia broadcast multicast MBMS service data and the corresponding timestamp.
  • the slave network element pair The data blocks of the plurality of MBMS services are sorted according to their service identifiers and then sent in the TTI.
  • the synchronization method may also have the following features:
  • the service identifier is one of the following identifiers: an MBMS service logical channel identifier, a temporary multicast group identifier, a MBMS service transmission identifier, or an MBMS service service identifier.
  • the synchronization method may also have the following features:
  • the sorting according to the service identifier thereof refers to the data block of the plurality of MBMS services in the order of the size of the MBMS service logical channel identifier, the temporary multicast group identifier, the MBMS service transmission identifier, or the MBMS service service identifier. Sort.
  • the synchronization method may also have the following features:
  • the logical channel identifier is an MBMS identifier or a radio bearer identifier.
  • the synchronization method may also have the following features:
  • the slave network element processes the data block of the MBMS service into a data block in the form of a medium access control layer protocol data packet MAC PDU, and the slave network element needs to be Data blocks of different MBMS services transmitted in the same TTI are sorted and sent.
  • the synchronization method may also have the following features:
  • the slave network element sorts the data blocks of the MBMS service
  • the data blocks of the MBMS service multiplexed on the same channel form a transport data block set
  • the transport data block set is sent in the same TTI. .
  • the synchronization method may also have the following features:
  • the slave network element processes the data block of the MBMS service into a radio link control protocol data unit RLC PDU or a medium access control layer service data unit MAC SDU.
  • RLC PDU radio link control protocol data unit
  • MAC SDU medium access control layer service data unit
  • the synchronization method may also have the following features:
  • the slave network element will use different RLC PDUs of the MBMS service when constructing the MAC PDU or
  • the MAC SDU data blocks are arranged in order.
  • the synchronization method may also have the following features:
  • the service identifier is included in a medium access control layer MAC protocol header.
  • the present invention further provides a synchronization system between the multimedia broadcast multicast service network elements of the multiplexed channel, including a master control network element and one or more slave network elements, where: the slave network element For receiving the MBMS service data and the corresponding timestamp from the master network element, when the data blocks of the multiple MBMS services multiplexed on the same channel need to be sent in the same TTI, the slave network element is also used to The data blocks of the plurality of MBMS services are sorted according to their service identifiers and then sent in the TTI.
  • the synchronization system may also have the following features:
  • the service identifier is one of the following identifiers: an MBMS service logical channel identifier, a temporary multicast group identifier, a MBMS service transmission identifier, or an MBMS service service identifier.
  • the synchronization system may also have the following features:
  • the slave network element is configured to sort the data blocks of the plurality of MBMS services according to the size sequence of the MBMS service logical channel identifier, the temporary multicast group identifier, the MBMS service transmission identifier, or the MBMS service service identifier.
  • the synchronization system may also have the following features:
  • the logical channel identifier is an MBMS identifier or a radio bearer identifier.
  • the synchronization system may also have the following features:
  • the slave network element is further configured to process the data block of the MBMS service into
  • a data block in the form of a MAC PDU which needs to sort data blocks of different MBMS services transmitted in the same TTI, and combines data blocks of MBMS services multiplexed on the same channel to form transmission data.
  • the block is assembled and sent.
  • the synchronization system may also have the following features:
  • the slave network element is further configured to process the data block of the MBMS service into a data block in the form of an RLC PDU or a MAC SDU, and the RLC PDU or MAC SDU data of different MBME services that need to be sent in the same TTI.
  • the blocks form a MAC PDU and are sent.
  • a group of network elements that synchronously send MBMS services can enable multiple network elements to multiplex MBMS service data of multiple MBMS services to the same transport channel in the same manner, thereby ensuring a transport channel in the MBMS service.
  • the MBMS service content between multiple network elements is synchronized.
  • FIG. 1 is a logical architecture diagram of a master network element and a slave network element in the prior art
  • FIG. 2 is a schematic diagram of a method for using the present invention in a UTRAN architecture
  • FIG. 3 is a schematic diagram of a method for using the present invention in an LTE architecture.
  • the present invention is applied to wireless communication technologies such as TD-SCDMA, WCDMA, HSPA+, and 3GPP LTE, especially in the MBMS content synchronization networking of the above wireless communication technologies.
  • the slave network element may sort the MBMS service data blocks according to one of the following sorting rules:
  • the logical channel identifier may be an MBMS-ID or an RB ID (Radio Bear).
  • Embodiment 1 Implementation method under UTRAN architecture
  • the slave network element receives the data packet sent by the master network element, and the data packet includes the MBMS service data and the corresponding time stamp.
  • the master network element mentioned here may be the master RNC, or SRNC, or the master NB+ (master NB+) under the HSPA+ flat architecture of UTRAN.
  • the slave network element may be a slave RNC under the UTRAN architecture, or a DRNC (Drift). Radio Network Controller, Wireless Slave Network Controller), or slave NB+ (slave NB+) under UTRAN's HSPA+ flat architecture.
  • the MBMS service data received by the slave network element or the MBMS service data further processed by the slave network element is specifically a data block in the form of a MAC PDU. If the data blocks are scheduled to be processed by the slave network element according to their time stamps, and the data blocks of different MBMS services need to be sent together in the same transmission time interval (TTI), the slave network elements are different according to the sorting rule of the present invention.
  • the data blocks of the MBMS service are arranged to form a set of transport block sets (Transport Block Sets) in the TTI, and the transport block set is a data block or a set of data packets in the form of MAC PDUs.
  • FIG. 2 it is a schematic diagram of a method for using the UTRAN architecture in the present invention.
  • one of the subordinate network elements receives the MBMS service data, some of the data blocks need to be in the same TTI. If the transmission is performed, the slave network element needs to sort the data blocks of different MBMS services mapped to the same transmission channel according to the sorting rule, and then send the data blocks.
  • the MBMS service has an MBMS service data block that needs to be sent within a certain TTI and is represented by a MAC PDU-11; MBMS service 2 has two MBMS service data blocks that are sent in the same ,, respectively using MAC PDU-21 and MAC.
  • PDU-22 indicates.
  • the slave network element sorts the MBMS service data blocks represented by the MAC PDU-11, the MAC PDU-21, and the MAC PDU-22, and the sorted MAC PDUs are in the order of MAC PDU-11, MAC PDU-21, and MAC PDU-22.
  • the network element forms the above MBMS service data block into a transport data block set in one TTI. (Transport Block Set), then, the slave network element sends the set of transport data blocks in the same TTI of the same FACH.
  • each subordinate network element is in the MBMS service.
  • the ordering of the data blocks must be a consistent collation. Therefore, when the transmission channel of the MBMS service is multiplexed, the MBMS service content between the plurality of network elements is synchronized.
  • Embodiment 2 Implementation method under the LTE architecture
  • the slave network element receives the data packet sent by the master network element, and the data packet includes MBMS service data and a corresponding time stamp.
  • the master network element mentioned here may be an MGW under the LTE architecture, or an MCE, and the slave network element may be an ENB under the LTE architecture.
  • the slave network element For the MBMS service data received by the slave network element, or the MBMS service data further processed by the slave network element, specifically, the RLC PDU (Radio Link Control Protocol Data Unit) or the MAC SDU (Media Access Control Layer Service Data) a data block in the form of a unit, if the data blocks are scheduled to be processed by the slave network element according to their time stamps, and the data blocks of different MBMS services need to be sent together in the same TTI, the slave network element is in accordance with the sorting rule of the present invention, The data blocks of these different MBMS services are arranged.
  • the slave network element constructs the MAC PDU, the different data blocks RLC PDU or MAC SDU are sequentially arranged and then transmitted.
  • the MBMS service data received by the slave network element includes N (N is a natural number) data blocks, and some of the data blocks need to be in
  • N is a natural number
  • the slave network element sorts and combines the above N data blocks in a MAC protocol data unit (ie, a MAC PDU), and then adds a MAC protocol header to form a MAC PDU, and the slave network element is in the same
  • the MAC PDU is sent out in the same frame of the MCH.
  • the logical channel identifier (such as MBMS-ID or RB ID) is included in the MAC protocol header.
  • each subordinate network element is in the MBMS service. Sorting of data blocks It must be a consistent sorting rule. Therefore, when the transmission channel of the MBMS service is multiplexed, the MBMS service content between the multiple network elements is synchronized.
  • the synchronization system between the multimedia broadcast multicast service network elements of the multiplex channel of the embodiment of the present invention includes a master control network element and one or more slave network elements, where:
  • the slave network element is configured to receive MBMS service data and a corresponding timestamp from the master network element, where the data blocks of multiple MBMS services multiplexed on the same channel need to be sent in the same TTI, the slave network The element is further configured to send, in the TTI, the data blocks of the multiple MBMS services according to their service identifiers.
  • the service identifier is one of the following identifiers:
  • the logical channel identifier is an MBMS identifier or a radio bearer identifier.
  • the slave network element is configured to sort the data blocks of the plurality of MBMS services according to the size sequence of the MBMS service logical channel identifier, the temporary multicast group identifier, the MBMS service transmission identifier, or the MBMS service service identifier.
  • the slave network element is further configured to process the data block of the MBMS service into a data block in the form of a MAC PDU, and sort the data blocks of different MBMS services that need to be sent in the same TTI, and then multiplex the data block in the same TTI.
  • the data blocks of the MBMS service of the same channel constitute a transmission data block set and transmitted.
  • the slave network element is further configured to process the data block of the MBMS service into a data block in the form of an RLC PDU or a MAC SDU, and the RLC PDU or MAC SDU data of different MBME services that need to be sent in the same TTI.
  • the blocks form a MAC PDU and are sent.
  • the present invention provides a synchronization and system between multimedia broadcast multicast service network elements of a multiplexed channel, and the data blocks of multiple MBMS services are sorted according to their service identifiers by the slave network element, so that multiple network elements are in the same manner.
  • the MBMS service data of multiple MBMS services are multiplexed to the same transport channel, so as to ensure that the MBMS service content between multiple network elements is synchronized when the transport channel of the MBMS service is multiplexed, and interference between adjacent cells is avoided.

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

Abstract

La présente invention concerne un procédé de synchronisation entre des éléments de réseau d’un service de diffusion et de multidiffusion multimédia (MBMS) au moyen du multiplexage de canal et son système correspondant. Le procédé de synchronisation comprend : un élément de réseau esclave reçoit les données de service MBMS et les références temporelles correspondantes ; lorsque des blocs de données de différents services MBMS multiplexés dans le même canal doivent être transmis dans le même intervalle de temps de transmission (TTI), l’élément de réseau esclave séquence les blocs de données des différents services MBMS en fonction de leurs identificateurs de service et transmet par la suite les blocs de données dans le TTI.
PCT/CN2009/071705 2008-08-07 2009-05-08 Procédé de synchronisation entre des éléments de réseau d’un service de diffusion et de multidiffusion multimédia (mbms) au moyen du multiplexage de canal et son système correspondant WO2010015159A1 (fr)

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CN200810135443A CN101646130A (zh) 2008-08-07 2008-08-07 复用信道的多媒体广播组播业务网元间的同步方法
CN200810135443.6 2008-08-07

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CN101883329B (zh) * 2010-07-01 2012-11-14 北京邮电大学 一种基于融合的eps支持mbms业务内容同步的方法和装置
WO2023197171A1 (fr) * 2022-04-12 2023-10-19 北京小米移动软件有限公司 Procédé et appareil de synchronisation de transmission, et support d'enregistrement

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