WO2010063226A1 - Procédé, appareil et système de communication pour transmettre les données de service mbms - Google Patents

Procédé, appareil et système de communication pour transmettre les données de service mbms Download PDF

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Publication number
WO2010063226A1
WO2010063226A1 PCT/CN2009/075182 CN2009075182W WO2010063226A1 WO 2010063226 A1 WO2010063226 A1 WO 2010063226A1 CN 2009075182 W CN2009075182 W CN 2009075182W WO 2010063226 A1 WO2010063226 A1 WO 2010063226A1
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WO
WIPO (PCT)
Prior art keywords
data packet
data
supplemented
sequence number
base station
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Application number
PCT/CN2009/075182
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English (en)
Chinese (zh)
Inventor
黄曲芳
邵飞
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of WO2010063226A1 publication Critical patent/WO2010063226A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS

Definitions

  • a multimedia broadcast/multicast service (MBMS) service is a data packet that transmits the same number and the same information to multiple user equipments (UEs) in different cells at the same time.
  • MBMS multimedia broadcast/multicast service
  • the base station transmits the same number of packets of the same information to the multiple UEs in each cell, where each cell has a different The progress of the transmission.
  • SC-PTM mode single cell mode
  • the UE When the UE receives the data packet sent by the source cell base station in the source cell, the UE receives the configuration information of the target cell, and receives the data packet currently sent by the target cell by using the handover procedure.
  • the inventor finds that: if the sequence number of the current data packet sent by the target cell is greater than the sequence number of the current data packet sent by the source cell, the UE may not receive the data packet normally due to the missed reception time of the data packet, thereby reducing the system. performance. Summary of the invention
  • the method, device, and communication for transmitting MBMS service data are provided in the embodiment of the present invention, in order to solve the problem that the UE sends data packets to the target cell in the prior art, because the transmission progress of the target cell is faster than that of the source cell, and the UE loses the data packet. system.
  • An aspect of the present invention provides a method for transmitting MBMS service data, including: detecting a handover of a UE from a source cell to a target cell; acquiring a sequence number A of a current data packet sent by the source cell, and current data sent by the target cell a sequence number B of the packet; if the sequence number B is greater than the sequence number A, determining a data packet to be supplemented; and transmitting the determined data packet to be supplemented.
  • a base station including: a detecting module, configured to detect that a UE is handed over from a source cell to a target cell, and an acquiring module, configured to acquire a sequence number A of a current data packet sent by the source cell, and the The sequence number B of the current data packet sent by the target cell, and the determining module, configured to determine, when the sequence number B is greater than the sequence number A, the data packet whose sequence number is greater than the sequence number A and smaller than the sequence number B is determined as a data packet to be supplemented And a sending module, configured to send the determined to-be-compensated data packet.
  • Another aspect of the present invention provides a communication system, including: a base station, configured to detect a handover of a UE from a source cell to a target cell; acquire a sequence number A of a current data packet sent by the source cell, and a current data packet sent by the target cell Sequence number B; If the above sequence number B is greater than the above sequence number A, it is determined that the data packet to be supplemented is sent.
  • the method, the device, and the communication system provided by the embodiment of the present invention by determining the transmission progress of the target cell and the source cell, send a to-be-submitted data packet to the UE that is handed over to the target cell, which solves the problem that the UE switches to the transmission progress in the prior art.
  • the problem of not receiving part of the data packet due to missed data packet receiving time reduces the data amount of the lost data packet of the UE and improves the reliability of the network.
  • FIG. 3 is a third embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for transmitting MBMS service data according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;
  • FIG. 6 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be further explained below in conjunction with specific embodiments and the accompanying drawings.
  • the embodiment of the present invention provides an MBMS service.
  • the method of data As shown in FIG. 1, the first embodiment of the present invention provides a method for transmitting MBMS service data, and this embodiment may include the following steps.
  • the detecting UE switches from the source cell to the target cell.
  • S102 Obtain the sequence number A of the current data packet sent by the source cell, and the sequence number B of the current data packet sent by the target cell.
  • serial number B is greater than the serial number A, determine a data packet to be supplemented.
  • the data packet that cannot be normally received by the UE due to the handover belongs to the data packet to be supplemented, and the data packet to be supplemented sent by the network side of the data packet to be supplemented may include all or part of the data whose sequence number is greater than the sequence number A and smaller than the sequence number B.
  • the packet may further include a data packet that all or part of the UE misses during the handover time.
  • the method provided by the embodiment of the present invention by determining the transmission progress of the target cell and the source cell, sends a to-be-subscribed data packet to the UE that is handed over to the target cell, and solves the problem that the UE switches to the target cell whose transmission progress is faster than the source cell in the prior art. After that, due to the missed packet receiving time, the problem of not receiving part of the data packet reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.
  • the method provided in the first embodiment above will be described in detail below through the second to fourth embodiments.
  • the second embodiment of the present invention provides a method for sending MBMS service data, which may include the following steps.
  • the eNB (Evolved Node B, evolved base station) detects that the UE switches from the source cell to the target cell. Specifically, the method for detecting the handover of the UE by the base station in the prior art is applicable to this step, and details are not described herein again.
  • the eNB acquires a sequence number of the current data packet sent by the source cell and the target cell. Specifically, after acquiring the handover success message sent by the target cell, the eNB forwards the handover success message to the source cell, and sends a request for the uplink data packet sequence number to the source cell and the target cell, requesting the source cell and the target cell to report The sequence number of the currently sent packet.
  • the sequence numbers of the data packets currently sent by the source cell and the target cell are obtained by receiving the information reported by the source cell and the target cell.
  • an application scenario in which an eNB receives and forwards a handover success message is taken as an example. However, the present invention is not limited thereto.
  • the method may be obtained by sending a report sequence number request.
  • the current data packet sequence number of the two cells for example, the application scenario in which the UE switches to the target cell or the cell synchronization between the base stations is negotiated. In this embodiment, it is assumed that the current data packet sequence number a sent by the source cell is 37, and the current data packet sequence number b sent by the target cell is 41.
  • the eNB determines whether the sequence number b is greater than the sequence number a. If yes, execute S204. In this step, if the sequence number b is greater than the sequence number a, it indicates that the data packet currently sent by the target cell is later than the data packet currently sent by the source cell, and the UE cannot receive the data packet whose sequence number is between the sequence numbers a and b, that is, to be supplemented.
  • the serial number of the data packet is the entire serial number of the serial number a and the serial number b. In this embodiment, the sequence number b (i.e., 41) is greater than the sequence number a (i.e., 37), so the eNB performs S204.
  • the eNB sends the to-be-compensated data packet. Specifically, the eNB selects at least one subframe from the data frame of the data packet encapsulating the target cell number b, and encapsulates the to-be-compensated data packet into the transport data block (TB) of the subframe, and is in the physical downlink control channel.
  • the address identifier is filled in the header area of the foregoing subframe, and is sent through the air interface.
  • the addressing identifier may be an identifier C-RNTI (Cell Radio Network Temporary Identifier) of a certain UE that receives the service data in the coverage of the cell, or indicates that the service is received within the coverage of the cell.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the eNB may select which of the foregoing identifiers to use for addressing according to actual conditions. For example, the preferred C-RNTI may be transmitted only for a certain UE, and the UE corresponding to the C-RNTI is a UE that is handed over from the source cell to the target cell, and the receiver of the data packet is compared with the other two addressing identifiers.
  • the waste of transmission resources is reduced.
  • the method provided by the embodiment of the present invention by determining the transmission progress of the target cell and the source cell, sends a to-be-subscribed data packet to the UE that is handed over to the target cell, and solves the problem that the UE switches to the target cell whose transmission progress is faster than the source cell in the prior art. After that, due to the missed packet receiving time, the problem of not receiving part of the data packet reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.
  • the third embodiment of the present invention provides a method for transmitting MBMS service data, where the eNB determines that the to-be-compensated data packet is composed of two parts: the data packet to be supplemented in the handover time-consuming period and the data packet whose sequence number is greater than the sequence number A and smaller than the sequence number B.
  • This embodiment may include the following steps.
  • the eNB acquires a handover time of the UE, that is, a time when the UE sends a handover request to a handover to a target cell. Specifically, the eNB may start a timer when acquiring a request for the UE to switch to the target cell, and when detecting that the UE completes the handover from the source cell to the target cell, the time recorded by the H ⁇ timer is t; optionally, the eNB at this time This timer can be stopped.
  • the method for detecting whether the UE completes the handover in the eNB is applicable to this step in the prior art, and details are not described herein again.
  • S302-303 is the same as S202-203 in the second embodiment and will not be described again.
  • the eNB determines a data packet to be supplemented.
  • the data packet to be supplemented in this step includes a data packet whose sequence number is larger than the sequence number a and smaller than the sequence number b, and the data packet missed during the UE handover process.
  • the UE is in the process of handover, that is, the handover time is too long, and some data packets sent by the source cell and/or the target cell are not normally received. In the embodiment of the present invention, these data packets are referred to as UE handover. Packets that are missing in time.
  • the eNB calculates the data packet that is missed in the UE handover time-consuming period, and specifically includes: the eNB acquires the average transmission rate V of the MBMS service received by the UE, and obtains the data amount that the UE misses during the handover time according to the time length recorded by the timer.
  • the amount of data packet missed by the UE during the handover time is determined by the foregoing ,, and the sequence number of the data packet missed by the UE during the handover time is before the sequence number a, thereby determining the data packet that the UE misses during the handover time.
  • the method provided by the embodiment of the present invention by determining the transmission progress of the target cell and the source cell, sends a to-be-subscribed data packet to the UE that is handed over to the target cell, and solves the problem that the UE switches to the target cell whose transmission progress is faster than the source cell in the prior art. After that, due to the missed packet receiving time, the problem of not receiving part of the data packet reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.
  • the fourth embodiment of the present invention provides a method for transmitting MBMS service data, where the eNB may send all the to-be-compensated data packets to the UE, and may also send some to-be-compensated data packets to the UE.
  • the fourth embodiment of the present invention is similar to the foregoing embodiment 2, and may include the following steps.
  • S401-S403 The same as S201-203 in the second embodiment, and details are not described herein again.
  • the eNB determines a to-be-transmitted data packet, and sends the determined to-be-transmitted data packet.
  • This step is similar to the S204 in the second embodiment. The difference is that in this step 404, the eNB does not directly send all the to-be-compensated data packets, but first determines the to-be-compensated data packets to be sent.
  • the eNB determines that the to-be-compensated data packet to be sent is referred to as a to-be-sent data packet.
  • the eNB may use all the to-be-compensated data packets as the to-be-sent data packets, or may use the partial-replenish data packets that meet the predetermined condition as the to-be-sent data packets. For example, the eNB calculates a maximum data amount of the local re-supplied data packet of the target cell according to the obtained current air interface busyness.
  • the part of the to-be-compensated data packet is determined as The data packet to be sent, wherein the total amount of data of the determined part of the to-be-compensated data packet is less than or equal to the maximum data amount; otherwise, all the to-be-compensated data packets are used as the to-be-sent data packet. Further, the eNB sends the determined to-be-sent data packet to the UE.
  • the method provided by the embodiment of the present invention by determining the transmission progress of the target cell and the source cell, sends a to-be-subscribed data packet to the UE that is handed over to the target cell, and solves the problem that the UE switches to the target cell whose transmission progress is faster than the source cell in the prior art. After that, due to the missed packet receiving time, the problem of not receiving part of the data packet reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.
  • the maximum data volume of the data packet can be re-sent, and the data packet to be sent can be determined, which can avoid the congestion problem of the transmission channel that may be caused when the data volume of the data packet to be supplemented is too large, thereby fully utilizing the channel resources to avoid the UE during the handover process. Missing the problem of receiving data packets and improving the quality of service of the business.
  • a person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the above program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • a fifth embodiment of the present invention provides a base station 50, including a detection module 501, an obtaining module 502, a determining module 503, and a sending module 504.
  • the detecting module 501 is configured to detect that the UE is handed over from the source cell to the target cell.
  • the obtaining module 502 is configured to obtain the sequence number A of the current data packet sent by the source cell, and the sequence number B of the current data packet sent by the target cell.
  • the determining module 503 is configured to determine, when the sequence number B is greater than the sequence number A, the data packet to be supplemented; wherein the data packet to be supplemented may include a data packet whose sequence number is greater than the sequence number A and smaller than the sequence number B, and may further include the UE Packets missed during the time.
  • the sending module 504 is configured to send a to-be-completed data packet.
  • the obtaining module 502 is further configured to acquire a handover time of the UE.
  • the determining module 503 is further configured to determine, as the data packet to be supplemented, the data packet that the UE misses during the handover time.
  • the obtaining module 502 is further configured to acquire a maximum amount of data that the target cell can transmit the data packet to be supplemented;
  • the sending module 504 is specifically configured to: when the data volume of the data packet to be supplemented is greater than the maximum data volume, Transmitting, by the part, the determined data packet to be supplemented; the data quantity of the to-be-complemented data packet determined by the part is less than or equal to the maximum data quantity; when the data quantity of the to-be-complemented data packet is less than or equal to the maximum data quantity, Send all of the determined data packets.
  • the base station provided by the embodiment of the present invention can be used in combination with the method provided by the embodiment of the present invention to determine the sending progress of the target cell and the source cell, and send the to-be-subscribed data packet to the UE that is handed over to the target cell, thereby solving the UE in the prior art.
  • the problem of not receiving part of the data packet due to missed packet reception time reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the sixth embodiment of the present invention provides a communication system 60, including: a base station 601, configured to detect that the UE 602 is handed over from the source cell to the target cell; and obtain the sequence number A of the current data packet sent by the source cell, and the current data sent by the target cell.
  • the serial number B of the packet if the serial number B is greater than the serial number A, it is determined that the data packet to be supplemented is sent.
  • the communication system provided by the embodiment of the present invention can be used in combination with the method and the device provided by the embodiment of the present invention to determine the transmission progress of the target cell and the source cell, and send the to-be-replenished data packet to the UE that is handed over to the target cell, thereby solving the existing In the technology, after the UE switches to the target cell whose transmission progress is faster than that of the source cell, the problem of not receiving part of the data packet due to missed data packet receiving time reduces the data amount of the lost data packet of the UE, and improves the reliability of the network.

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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, un appareil et un système de communication pour transmettre les données de service de diffusion/multidiffusion multimédia (MBMS), le procédé de transmission des données de service MBMS comprenant : la détection d'une commutation d'un équipement utilisateur (UE) d'une cellule source à une cellule de destination; l'obtention du numéro d'ordre A du paquet de données courant transmis par la cellule source et du numéro d'ordre B du paquet de données courant transmis par la cellule de destination; la détermination du paquet de données devant être fourni, si le numéro d'ordre B est supérieur au numéro d'ordre A; et la transmission du paquet de données devant être fourni. La mise en œuvre de l'invention résout le problème dans la technologie existante selon lequel, après que l'équipement utilisateur a commuté vers la cellule de destination dont la progression de transmission est plus rapide que celle de la cellule source, une partie des paquets de données ne sont pas reçus en raison de l'absence du temps de réception des paquets de données. La quantité des données perdues est réduite, et la fiabilité du réseau est améliorée.
PCT/CN2009/075182 2008-12-01 2009-11-27 Procédé, appareil et système de communication pour transmettre les données de service mbms WO2010063226A1 (fr)

Applications Claiming Priority (2)

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CN200810179209A CN101754111A (zh) 2008-12-01 2008-12-01 发送mbms业务数据的方法、设备及通信系统
CN200810179209.3 2008-12-01

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WO2021175443A1 (fr) * 2020-03-06 2021-09-10 Nokia Technologies Oy Prévention de perte de paquets dans des transmissions point à multipoint
CN115087051A (zh) * 2021-03-11 2022-09-20 中国移动通信有限公司研究院 业务处理方法、装置及相关设备

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CN108260175B (zh) * 2018-01-10 2021-02-26 海能达通信股份有限公司 集群通信系统、集群终端、集群核心网及切换小区的方法
CN110912633A (zh) * 2018-09-17 2020-03-24 北京华信泰科技股份有限公司 一种数据播发方法及装置
WO2021134456A1 (fr) * 2019-12-31 2021-07-08 华为技术有限公司 Appareils et procédés d'envoi et de réception de multidiffusion
CN111741439A (zh) * 2020-06-22 2020-10-02 河北远东通信系统工程有限公司 一种B-Trunc系统的集群组播切换方法

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WO2021175443A1 (fr) * 2020-03-06 2021-09-10 Nokia Technologies Oy Prévention de perte de paquets dans des transmissions point à multipoint
CN115087051A (zh) * 2021-03-11 2022-09-20 中国移动通信有限公司研究院 业务处理方法、装置及相关设备

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