WO2008046337A1 - Système wimax et procédé de transfert de terminal et station de base appropriée - Google Patents

Système wimax et procédé de transfert de terminal et station de base appropriée Download PDF

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Publication number
WO2008046337A1
WO2008046337A1 PCT/CN2007/070756 CN2007070756W WO2008046337A1 WO 2008046337 A1 WO2008046337 A1 WO 2008046337A1 CN 2007070756 W CN2007070756 W CN 2007070756W WO 2008046337 A1 WO2008046337 A1 WO 2008046337A1
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WIPO (PCT)
Prior art keywords
base station
terminal
target
mbs
target base
Prior art date
Application number
PCT/CN2007/070756
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English (en)
Chinese (zh)
Inventor
Jianyong Li
Liang Gu
Musen Li
Wenliang Liang
Changhong Shan
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008046337A1 publication Critical patent/WO2008046337A1/fr

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Classifications

    • 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
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • 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
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a microwave access global interworking system, a terminal switching method thereof, and a base station.
  • WiMAX Worldwide Interoperability for Microwave Access
  • MS Mobile Station
  • ASN Access Service Network
  • CSN Connection Service Network
  • the ASN is defined as a network function set for providing WiMAX user terminals with radio access services.
  • the ASN includes a base station (Base Station, referred to as "BS") and an ASN gateway (ASN Gate Way referred to as "ASN-GW”) network element, and an ASN. May be shared by multiple CSNs.
  • BS Base Station
  • ASN gateway ASN Gate Way referred to as "ASN-GW”
  • the main functions of the ASN include the functions of the base station and the functions of the ASN-GW.
  • the functions of the base station are: providing L2 connection of the base station and the subscriber station SS/MS, radio resource management, measurement and power control, and compression and encryption of air interface data.
  • the functions of ASN-GW include: proxy function for SS/MS authentication, authorization and accounting functions; network discovery and selection for NSP; relay function for providing L3 information for SS, such as IP address allocation .
  • CSN is defined to provide IP connection services for WiMAX user terminals.
  • the CSN mainly provides the following functions: IP address allocation of SS/MS, Internet access, Authentication, Authorization, Account (“AAA”) proxy or service, user-based authorization control, ASN to CSN Tunnels, billing for WiMAX subscribers, and settlement between operators, tunneling between CSNs in roaming, switching between ASNs, and various WiMAX services (such as location-based Business, multimedia multicast and broadcast services, IP Multimedia Subsystem services).
  • AAA Authentication, Authorization, Account
  • the MS/SS is a (mobile) user equipment that the user uses to access the WiMAX network.
  • the WiMAX network now mainly follows the IEEE 802.16-2004 (802.16d) standard, which operates from 2 GHz to 11 GHz and is a licensed and unlicensed hybrid band.
  • the physical layer of Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Multiple Access (OFDMDMA) can effectively resist multipath fading. . In the case of optimal channel fading, the transmission rate can approach 75 Mbps.
  • the IEEE 802.16-2004 (802.16d) standard is used for non-line-of-sight point-to-multipoint technology in metropolitan area networks, primarily in the form of fixed and nomadic networks.
  • IP multicast technology is only applicable to wired IP networks, not to mobile networks, because mobile networks have specific network structures, functional entities, and wireless interfaces, which are different from wired IP networks.
  • the WiMAX network introduces a Multicast Broadcast Service (MBS), which is a point-to-multipoint service that provides a data source to send data to multiple users in a mobile network.
  • MBS Multicast Broadcast Service
  • Network resource sharing improves the utilization of network resources, especially air interface resources.
  • the MBS introduced by the WiMAX network can not only realize plain-text low-rate message-like multicast and broadcast, but also realize multicast and broadcast of high-speed multimedia services, which undoubtedly conforms to the trend of future mobile data development.
  • MBS based on WiMAX network supports two access modes: single base station access and multiple base station access.
  • multi-base access mode all base stations in an MBS zone (identified by MBS zone ID) use the same multicast connection identifier (Multicast Connection ID, "MCID") and MBS multicast group security.
  • MBS GSA MBS Group Security Association
  • MBS GSA transmits the content of the same MBS stream, and the terminal registered with the MBS service can receive the MBS content through multiple base stations in the MBS domain.
  • the terminal in the idle (Idle) mode moves across the base station in the MBS domain, there is no need to re-establish the connection, and the MBS can be received without being affected, and the MBS is realized. Sew switch.
  • Some globally defined service flows can carry broadcast or multicast information to multiple terminals. These service flows have Quality of Service (QoS) parameters and may need to be encrypted with a globally defined data encryption key.
  • QoS Quality of Service
  • a Service Flow Identifier (“SFID") is used to identify a one-way service flow
  • a Connection ID (“CID") is used to identify a connection. All traffic flows are transmitted over the air interface through the MAC (Media Access Control) layer, ie the SFID is mapped to a CID.
  • the MCID is the connection identifier dedicated to the multicast connection.
  • 802.16e specifies the use of MBS Content ID to identify a multicast service.
  • a Protocol Data Unit (“PDU”) transmitted on one MCID contains one or more MBSs.
  • PDU Protocol Data Unit
  • the link layer uses a logical channel identifier ("LCID") to indicate which content is carried in the link layer packet.
  • LCID logical channel identifier
  • the LCID and MCID uniquely correspond to a content identifier.
  • GSA Group Security Association
  • GTEK Group Traffic Encryption Key
  • Each GSA has two GTEKs that are randomly generated in the base station or other devices on the network and encrypted using the same algorithm encrypted with a Traffic Encryption Key (“ ⁇ ").
  • the GTEK in the " ⁇ 2 Key-Request/Reply” message is encrypted by the Key Encryption Key (“KEK").
  • GKEK Group Key Encryption Key
  • Each GSA has only one GKEK, which is used to encrypt each GTEK of a message in the same multicast group.
  • PPMv2 Key-Request/Reply is also encrypted by the GKEK.
  • the following key is included in an MBS GSA:
  • MAK MBS Authentication Key
  • the MBS Group Traffic Encryption Key (MGTEK), which is 128 bits long, is used to indirectly protect MBS data and is updated more frequently than MAK.
  • MGTEK is a random number provided by an access network, such as a base station that acts as an access network authorization key. It is only used to generate an MBS Traffic Key (MTK) with the MAK.
  • MTK MBS Traffic Key
  • MTK MBS data encryption key
  • MTK is used to encrypt MBS transmission data. It is a 128-bit key generated by MAK and MGTEK through a function.
  • the terminal decrypts the received data according to the MTK generated by MAK and MGTEK.
  • the inventors have found that the existing protocol describes the implementation of service reception continuity under the new base station in which the terminal moves to the same MBS domain in the idle state (Idle) in the MBS, but does not provide the active (Active) state.
  • the context transfer process does not describe how to ensure that when the terminal is in an active state and moves to a new base station in a different MBS domain that transmits the same MBS. Business continuity.
  • Embodiments of the present invention provide a microwave access global interworking system and a terminal handover method thereof and a base station thereof, so that an active terminal in a WiMAX network can maintain MBS service continuity when switching.
  • An embodiment of the present invention provides a terminal switching method for a microwave access global interworking system, including:
  • the target base station and/or the target gateway acquires, from the source base station and/or the source gateway, the identifier of the multicast broadcast service that the terminal is receiving;
  • the target gateway and the target base station send the multicast broadcast service corresponding to the identifier
  • the multicast broadcast service corresponding to the identifier is received from the target base station.
  • the embodiment of the present invention further provides a global access system for microwave access, including a target base station, a target gateway, a source base station, and a source gateway.
  • the source base station and/or the source gateway include: a module for sending an identifier of a multicast broadcast service received by the terminal when the terminal performs handover;
  • the target base station and/or target gateway includes: And a module for acquiring an identifier of the multicast broadcast service received by the terminal when the terminal performs the handover; the target base station and the target gateway further include: a module for sending the MBS corresponding to the identifier.
  • the target base station and/or the target gateway acquires the identifier of the MBS received by the terminal from the source base station and/or the source gateway, and delivers the MBS corresponding to the identifier. After the terminal switches to the target base station, the MBS corresponding to the identifier is received from the target base station.
  • the problem of continuity of MBS service transmission after an active terminal in a WiMAX network is switched to a different base station is solved.
  • the target base station and/or the target gateway acquires the identifier of the MBS received by the terminal from the source base station and/or the source gateway, and includes multiple situations, for example, the target base station acquires from the source base station, and the target base station acquires from the source gateway, the target.
  • the gateway is obtained from the source gateway, and the target gateway is obtained from the source base station. If the target gateway and the source gateway are the same gateway, the target base station can be said to be obtained from the source gateway, or can be obtained from the target gateway.
  • FIG. 1 is a schematic diagram of a WiMAX network architecture according to the prior art
  • FIG. 2 is a flow chart of a terminal handover method of a WiMAX system according to a first embodiment of the present invention
  • FIG. 3 is a flow chart of a terminal handover method of a WiMAX system according to a third embodiment of the present invention.
  • the first embodiment of the present invention relates to a terminal handover method of a WiMAX system.
  • the target base station of the terminal handover is in the same MBS domain as the source base station, and the specific process is as shown in FIG. 2.
  • step 201 when the terminal in the active state moves in the same MBS domain across the base station, the handover is initiated by sending a "MOB_MSHO-REQ (Mobile Terminal Handover Request)" message to the serving base station, that is, the source base station.
  • MOB_MSHO-REQ Mobile Terminal Handover Request
  • the source base station sends a "MOB_MSHO-REQ" message sent by the terminal, and then sends a handover request (HO request) message to the serving gateway, that is, the source gateway.
  • the handover request message carries context information of the terminal, where the context information includes an identifier of the MBS.
  • the identifier of the MBS is a service flow identifier (SFID) and/or a content identifier (Content ID). And/or business identifier (MBS Service ID), also That is, the handover request message is required to carry the content such as the SFID and/or the content identifier and/or the MBS Service ID; if the terminal joins (MBN) the MBS multicast group by using the multicast group technology, the identifier of the MBS is MBS.
  • the IP multicast address of the MBS domain that is, the handover request message is required to carry an IP multicast address and the like.
  • step 203 the source gateway forwards the handover request message to the target gateway, and the forwarded handover request message carries the terminal context information including the MBS identifier.
  • the source base station and the target base station are connected to one gateway, this step can be omitted.
  • the target gateway obtains the MBS context information of the terminal by obtaining the terminal context information, and further obtains the context of the MBS service, so that the terminal can switch to the target base station, Receiving the MBS service under the target base station solves the problem of continuity of MBS service transmission after the terminal in the active state in the WiMAX network switches to a different base station.
  • the MBS context information of the terminal is used for the target gateway to obtain the context information of the MBS service, so that the target gateway determines whether the bearer information of the MBS service already exists, and further determines whether the service can be the service without the MBS service bearer. Pre-registration and bearer establishment are performed in order to maintain the continuity of the MBS service.
  • the target gateway registers with the MBS server to establish a service bearer of the MBS, so that the active terminal in the WiMAX network can be continuously received after switching to the base station without the MBS service.
  • the source base station and the target base station are connected to a gateway, and the corresponding MBS service bearer has been established on the gateway, this step can be omitted.
  • the gateway controls whether to send to the access network according to Counting; Second, when no terminal receives the MBS, even the gateway also Do not send. If the target gateway and the source base station of the handover belong to the same MBS domain, no target terminal receives the MBS service under the target gateway, and in this case, the second service is captured between the MBS server and the target gateway. In the transmission mode, the potential joining of a terminal at this time is equivalent to the first terminal that joins the MBS service under the target gateway. In order to speed up the process of receiving the service after the handover, the target gateway can be injected into the MBS server at this time. To update the downlink playlist of the MBS service, and to establish a service bearer between the target gateway and the MBS server.
  • the establishment of the service bearer between the target gateway and the MBS server can be completed in one of the following ways: (1) After receiving the handover request message, the target gateway performs the MBS registration process with the MBS server to perform the service between the target gateway and the MBS server. The establishment process of the bearer. That is, this step 205 is performed after step 204.
  • step 205 is performed after step 210.
  • the target gateway After receiving the handover confirmation message, the target gateway performs the MBS registration process with the MBS server to establish a service bearer between the target gateway and the MBS server. That is to say, this step 205 is performed after step 215.
  • the target gateway sends a handover request message carrying the terminal context information including the MBS identifier to the target base station.
  • the source gateway sends the message.
  • the target base station obtains the terminal context information, and further obtains the MBS context information, so that the terminal can receive the MBS service under the target base station after the terminal switches to the target base station.
  • the problem that the continuity of the MBS service transmission after the terminal in the active state in the WiMAX network switches to a different base station is solved.
  • the target base station needs to request the MBS related information, such as the MCID, from the target gateway or the MBS proxy (MBS Proxy) during the handover preparation process. And the security association identifier (SAID) and context information. Assuming step 206' of the step of requesting MBS related information for the target base station, step 206' may be performed after step 206 or after step 216.
  • MBS related information such as the MCID
  • MBS Proxy MBS proxy
  • SAID security association identifier
  • step 206' may be performed after step 206 or after step 216.
  • the process also needs to go to step 208, the target base station establishes the service bearer of the MBS, and the base station side acquires the relevant key.
  • the terminal in the active state of the WiMAX network can be continuously received after switching to the base station without the MBS service.
  • This step can be performed after step 207, or step 209, or step 216.
  • the target base station establishes a service bearer of the MBS by performing a pre-registration and registration process of the data path, and performs authentication, authorization, and accounting (AAA) in the service bearer process.
  • the server or MBS server obtains the relevant key of the MBS.
  • the pre-registration and registration process for the data channel can be done in one of the following phases:
  • the target base station After receiving the handover request message, the target base station performs a pre-registration process of the data channel, and performs a registration process of the data channel when receiving the handover confirmation message. That is, it is executed after step 207.
  • the target base station After transmitting the handover response message, the target base station performs a pre-registration process of the data channel, and performs a registration process of the data channel when receiving the handover confirmation message. That is, at the step
  • the target base station After receiving the handover confirmation message, the target base station performs a registration process of the data channel. That is, it is executed after step 216.
  • step 209 the target base station returns a handover response (HO response) message to the target gateway.
  • step 210 the target gateway returns a handover response message to the source gateway.
  • HO response handover response
  • step 211 the source gateway returns a handover response message to the source base station.
  • the source base station sends a "MOB_BSHO-RSP (Mobile Handover Response)" message to the terminal in response to the handover request message initiated by the terminal.
  • MOB_BSHO-RSP Mobile Handover Response
  • step 213 the terminal transmits a "MOB_HO_IND (Mobile Handover Indication)" message to the source base station to confirm the handover.
  • MOB_HO_IND Mobile Handover Indication
  • step 214 the source base station sends a HO confirm message to the source gateway.
  • step 215 the source gateway sends a handover confirmation message to the target gateway.
  • step 216 the target gateway sends a handover confirmation message to the target base station.
  • the signaling flow between the gateways in the above steps may be omitted.
  • step 217 after the terminal accesses the target base station, the MBS is received under the target base station.
  • the target base station performs a counting decision whether to transmit the MBS using the ptp (point-to-point) transmission mode or the ptm (point-to-multipoint) transmission mode. If the original PTP mode is used, the target base station decides to switch to the ptm mode. Then, the target base station leads the conversion process of the transmission mode.
  • the terminal when the terminal moves in the same MBS domain and accesses the target base station, if the target base station transmits the MBS in the ptm mode, and the source base station switched by the terminal also transmits the ptm transmission mode MBS, the terminal does not need to switch the transmission mode, and can continue to receive the MBS service by using the original receiving parameters.
  • the target base station transmits the MBS in ptp mode
  • the source base station transmits the MBS in the ptm or /ptp transmission mode, or the target base station transmits the MBS in the ptm mode, and the source base station transmits the MBS in the ptp transmission mode
  • the target base station And the terminal needs to perform the MBS service reception in the transmission mode of the target base station through the transmission mode conversion process.
  • the target base station and/or the target gateway acquires the identifier of the MBS received by the terminal through the handover request message sent by the source base station and/or the source gateway, and acquires the MBS context and adds the context of the terminal in advance when the handover starts.
  • the information is used to establish a transmission bearer and MBS key information for a base station that has not previously transmitted the MBS. Therefore, when the terminal accesses the target base station, the terminal can immediately receive the MBS under the target base station, which speeds up the reception of the terminal after receiving the target base station. The process of MBS.
  • the target base station needs to notify the original serving base station, that is, the source base station, by using the network message, and deletes the context information of the terminal and the related information of the terminal in the MBS context to save system resources.
  • the target base station sends a message that the handover is completed to the target gateway, as in step 218.
  • the target gateway sends a message that the handover completes to the source gateway. If the target gateway and the source gateway are not the same gateway, the target gateway also needs to notify the source gateway to delete the context information of the terminal by using the message that the handover is completed.
  • the MBS has context information about the terminal to save system resources.
  • the source gateway sends a message that the handover is completed to the source base station.
  • the source base station deletes the context information of the terminal and the information about the terminal in the MBS context to save system resources. As step 220.
  • the source gateway needs to notify the target base station that it has previously sent the handover request message but the terminal does not receive the MBS service under it and the target gateway deletes the context of the terminal. If the terminal that has not completed the access is used as the first potential user, and the service bearer of the MBS is pre-established, the bearer needs to be removed to save system resources, as shown in step 221. For however, if there is no target gateway under which the terminal receives the MBS, if the MBS server does not send a service to the MBS server when no MBS server receives the MBS under it, the target gateway needs to perform the MBS server. The process of registering the business.
  • the target gateway and the source gateway are not the same gateway as an example. If the target gateway and the source gateway are the same gateway, the target gateway and the source gateway in the embodiment may be omitted.
  • a second embodiment of the present invention relates to a terminal handover method of a WiMAX system.
  • the present embodiment is substantially the same as the first embodiment except that in the first embodiment, the target base station and/or the target gateway are advanced at the start of handover.
  • the context information of the terminal is added, and the service bearer and the MBS key information are established for the base station without the MBS transmission before, to avoid waste of resources caused by the terminal not finally accessing the target base station.
  • the target base station After the terminal accesses the target base station, if the target base station already has the
  • the target base station needs to perform the ptp/ptm mode conversion judgment. If the terminal originally uses the ptm mode to receive the MBS service, and the target base station decides to use the ptm mode, the terminal directly uses the original MCID and the key parameter to continue. Receive the MBS. If the terminal needs to be converted from -t- to ptm or from ptm to ptp, or both before and after the pt-transmission mode, you need to obtain new MCID or CID information during the Ranging process, and then use the new one. The MCID or CID receives the MBS under the target base station. Of course, it is also necessary to increase the MBS context information of the terminal in the target gateway.
  • the target base station If the target base station does not have the MBS service transmission, after the terminal accesses the target base station, if the target base station decides to extract the ptm mode transmission, the target base station requests the MCID and the SAID from the target gateway or the MBS proxy. Context information, obtaining MBS key information; if the target base station decides to extract the ptp mode transmission, the target base station allocates the CID, and requests the security gateway context information from the target gateway or the MBS proxy to obtain the MBS key information. The target base station establishes the MBS context information, and establishes a service bearer of the MBS with the target gateway.
  • the target gateway needs to perform the MBS to the MBS server. Registration, while establishing and hosting resources for the MBS server.
  • the third embodiment of the present invention relates to a terminal handover method of a WiMAX system.
  • the present embodiment is substantially the same as the first embodiment except that in the first embodiment, the target base station switched by the terminal is in the same MBS as the source base station. In the present embodiment, the target base station of the terminal handover is in a different MBS domain than the source base station.
  • step 301 when the terminal in the active state moves across the base station, it moves to the same MBS content included in the different MB S domain of the same MB S and is announced through the service announcement service. Identifying or the same MBS IP multicast address information or other means, the terminal can know that the same MBS service can also be received under the target base station, and obtain the MBS content identifier of the same MBS service and/or the IP of the MBS. Multicast address and/or the MBS service identifier.
  • the terminal may initiate a handover procedure by transmitting a "MOB_MSHO-REQ" message to the serving base station, that is, the source base station.
  • Steps 302 to 316 are the same as steps 202 to 216, and are not described here.
  • step 317 after the terminal accesses the target base station, information related to receiving the MBS, such as an MCID or a CID, is obtained through the Ranging access procedure.
  • the target base station may determine, according to the identifier of the source base station in the received handover request message, that the base station is in a different MBS domain than the source base station, and the target base station needs to send the terminal the required terminal to receive the MBS under the target base station.
  • Related Information If the target base station needs to switch the transmission mode after the terminal accesses the target base station, the target base station controls the transmission mode conversion process, and the target base station can apply for the MCID in the MBS domain to the target gateway or the MBS proxy.
  • the target base station when the target base station and the source base station are in different MBS domains, the target base station sends relevant information to the terminal to receive the MBS under the target base station, so as to ensure that the activated terminal moves to a different transmission of the same MBS.
  • the MBS domain When the MBS domain is down, the MBS can still be received continuously.
  • the terminal For the terminal, if the terminal originally uses the ptm mode for reception, and according to the parameter range sent by the target base station, it is determined that the newly obtained parameter is the MCID, indicating the transmission mode of the source base station and the target base station. If the ptm mode is used, the terminal uses the parameter of the target base station to access the MBS to access; if the terminal originally uses the ptp transmission mode, according to the parameter range, it is determined that the newly obtained parameter is the MCID, and the terminal needs to be removed first. A connection to the source base station; then receiving the MBS based on the new parameters. The terminal also needs the DSA process to obtain the SAID and context information and inform the MBS Content list, and obtain the key information required by the MBS through the Key request/Key reply process.
  • the terminal determines that the newly obtained parameter is a CID according to the parameter range delivered by the target base station, it indicates that the terminal may be the first terminal that receives the MBS under the target base station; or the target base station is in the ptp mode. After the terminal joins and receives the MBS, no transmission mode transition has occurred. The terminal obtains SAID, LCID and other information through the DSA process, and obtains the key message required by the MBS through the Key request/Key reply process.
  • the network side After the terminal receives the MBS in the target base station, in order to save system resources, the network side also needs to delete necessary information in the relevant network element, such as step 318 to step 321, and steps 318 to 321 are the same as steps 218 to 221, respectively. , will not repeat them here.
  • the target base station if the target base station originally transmits the MBS in the ptp mode, after the new terminal is added, the target base station still uses the ptp mode for transmission, and the target base station can improve the access process.
  • the CID is selected when receiving the handover request from the target gateway; for consideration of avoiding wasting CID resources, it is also possible to select not to allocate the CID when receiving the handover request from the target gateway, and to allocate the CID when there is a real service to be transmitted. If the target base station has already transmitted in the p-t-m (point-to-multipoint) mode and the new MBS is still transmitted in the p-t-m mode after the terminal is added, the target base station does not need to allocate the CID.
  • the terminal may be triggered by the network side (the above solution), or the terminal may re-initiate the Join process.
  • the relevant MBS context at the source base station/gateway can be deleted, and the context under the new MBS domain is re-established on the target side (base station or gateway).
  • a fourth embodiment of the present invention relates to a terminal handover method of a WiMAX system, and the present embodiment is substantially the same as the third embodiment, except that in the third embodiment, the target base station and/or the target gateway are advanced at the start of handover.
  • the target base When the terminal accesses the target base station, the station and/or the target gateway adds the context information of the terminal, and establishes a service bearer and MBS key information for the base station that has not previously transmitted the MBS, so as to avoid the terminal being missed due to the terminal. Waste of resources caused by entering the target base station.
  • the terminal accesses the target base station, if the target base station already has the MBS service being transmitted, it is necessary to increase the context information of the terminal and add the terminal information in the MBS context. If the target base station does not have the MBS service yet, the terminal is the first terminal to join the MBS. Because the target gateway and the target base station do not obtain the information about the MBS service, the terminal cannot obtain the MCID through the Ranging process. Or CID and other information, so the terminal needs to perform IGMP Join or DSA to join the MBS service multicast group. If the target gateway is not registered in the MBS server before then, the target gateway needs to perform the service registration process with the MBS server and establish a bearer. If the target base station has not pre-registered the bearer resources, the target base station needs to target the target. The gateway performs the registration process of the bearer resources.
  • a fifth embodiment of the present invention relates to a terminal handover method of a WiMAX system.
  • the present embodiment is substantially the same as the third embodiment except that, in the third embodiment, after the terminal accesses the target base station, the terminal is connected by Ranging.
  • the ingress process obtains relevant information, such as MCID or CID, required to receive the MBS under the target base station.
  • the Ranging access procedure notifies the terminal to perform related information, such as MCID or CID, required to receive the MBS under the target base station.
  • the DSA process tells the SA-related information that the MBS key information is obtained through the Key request/Key reply process.
  • the target base station if the target base station has transmitted the MBS in the ptm mode or originally transmitted the MBS in the ptp mode, but after the new terminal is added, the ptm mode is used for transmission, and the target base station informs the terminal through the Ranging process.
  • the target base station Receiving the MCID required by the MBS under the target base station, telling the terminal SAID and the context information through the DSA process, and informing the MBS key information through the Key request/Key reply process; if the target base station originally transmits in the ptp mode, the new join After the terminal, the target base station still uses the -t- mode for transmission, and the target base station can select the CID to be allocated at this time, and tell the terminal to receive the CID required by the MBS under the target base station through the Ranging process.
  • the DSA tells the terminal the SAID and the context information, and tells the MBS key information through the Key request/Key Reply procedure.
  • the scenario in which the base station establishes an MBS service bearer is described, that is, if the target base station does not have the MBS service bearer received by the terminal at the source base station, the MBS is established in the target base station.
  • Service bearer but in practical applications, the MBS service bearer can also be established based on the MBS domain, that is, when an MBS is in an MBS domain, there is the first terminal that receives or potentially receives the MBS, The bearer of the MBS is established under all the base stations and gateways in the MBS domain.
  • the handover procedure between the base stations belonging to one MBS domain is similar to the handover in the scenario of not receiving the MBS service, except that the MBS service related information is included in the delivered terminal context.
  • the difference from the above embodiments is that, in the handover process, the process of establishing an MBS service bearer is not accompanied. The establishment of the MBS service bearer needs to occur in the switching scenario between the MBS domains.
  • the terminal switches from base station A to base station B, and base station A and base station B are in the same MBS domain. Then, the base station B needs to obtain the context information of the MBS of the terminal by acquiring the context information process of the terminal.
  • the MBS service bearer can also be established based on the MBS domain. Therefore, the base station B has previously established the MBS service bearer. Therefore, the base station B can deliver the MBS through the established bearer.
  • the target gateway may obtain the context information of the terminal's MBS by obtaining the context information of the terminal, and pass the established The bearer delivers the MBS.
  • the MBS service bearer needs to be established under all the base stations and gateways of the MBS domain where the base station B is located.
  • the service bearer of the MBS is established based on the MBS domain, when the target base station of the terminal and the source base station are in the same MBS domain, the MBS service related information needs to be included in the delivered terminal context without accompanying the establishment of the MBS service bearer.
  • the process further ensures that the terminal can continuously receive the MBS after switching to different base stations.
  • a sixth embodiment of the present invention relates to a WiMAX system including a target base station, a target gateway, a source base station, and a source gateway.
  • the source base station and/or the source gateway include: means for transmitting an identifier of the MBS received by the terminal when the terminal performs handover.
  • the target base station and/or the target gateway include: a module for acquiring an identifier of the MBS received by the terminal when the terminal performs handover.
  • the target base station and the target gateway further include a module for delivering the MBS corresponding to the identifier to solve the activated terminal in the WiMAX network. The problem of continuity of MBS service transmission after switching to different base stations.
  • the target base station and/or the target gateway further includes means for establishing a traffic bearer from the MBS server to the target gateway and the target base station, the module receiving the first one of the target base station and/or the target gateway at the terminal
  • the service bearer is established when the terminal of the MBS is potentially received. Therefore, the active terminal in the WiMAX network can be continuously received after switching to the base station that has not been delivered by the MBS service.
  • the target base station further includes: means, when the target base station and the source base station are in different MBS domains, send, to the terminal, a module that receives the information about the MBS under the target base station; and is configured to acquire the information in the process of establishing a service bearer.
  • a module for MBS related keys The terminal obtains the relevant key of the MBS through a key request and response process. It is guaranteed that when the active terminal moves to a different MBS domain transmitting the same MBS, the MBS can still be received continuously.
  • the target base station further includes a module for notifying the source base station to delete the context information of the MBS of the terminal through the target gateway and the source gateway after the terminal accesses the target base station, thereby saving system resources.
  • the target gateway includes a module for notifying the source gateway to delete the context information of the MBS of the terminal when the target gateway and the source gateway are not the same gateway, thereby saving system resources.
  • the source base station, the source gateway, the target base station, and the target gateway may further include: configured to: when an MBS is in the MBS domain where the network entity is located, the first one receives or potentially receives the MBS.
  • the module of the MBS service bearer is established.
  • the MBS service bearer is built based on the MBS domain.
  • the target base station further includes a module for obtaining context information of the MBS of the terminal by acquiring a context information process of the terminal when the target base station and the source base station are in the same MBS domain.
  • the module of the target base station is configured to deliver the MBS corresponding to the MBS.
  • the MBS is delivered by the established bearer.
  • the target gateway further includes a module for obtaining the context information of the MBS of the terminal by acquiring the context information of the terminal when the target gateway is not the same gateway as the source gateway but is in the same MBS domain.
  • the module of the target gateway is configured to deliver the MBS corresponding to the MBS.
  • the MBS is delivered by the established bearer.
  • the delivered terminal context includes MBS service related information without the process of establishing an MBS service bearer, further ensuring that the terminal can continuously receive the MBS after switching to different base stations.
  • the related information of the MBS mentioned above includes one or any combination of the following: a multicast connection identifier, a logical channel identifier, a content identifier, a multicast broadcast service domain identifier, a multicast IP address, and a multicast broadcast service. Related key.
  • the target network obtains the identifier of the MBS received by the terminal from the source network, and delivers the MBS corresponding to the identifier. After the terminal switches to the target base station, the MBS corresponding to the identifier is received from the target base station.
  • the problem of continuity of MBS service transmission after an active terminal in a WiMAX network is switched to a different base station is solved.
  • the target network obtains the identifier of the MBS received by the terminal from the source network, and includes multiple situations, for example, the target base station acquires from the source base station, the target base station acquires from the source gateway, the target gateway acquires from the source gateway, and the target gateway obtains from the source gateway.
  • the base station acquires, if the target gateway and the source gateway are the same gateway, the target base station can be said to be obtained from the source gateway, or can be said to be obtained from the target gateway.
  • the target base station and/or the target gateway have not received the MBS service corresponding to the identifier of the MBS, establish a bearer from the MBS server to the target gateway to the target base station, so that the active terminal in the WiMAX network switches to the original without MBS. After the base station delivered by the service, the service can be continuously received.
  • the target base station sends relevant information to the terminal to receive the MBS under the target base station, and ensures that the activated terminal moves to a different MBS domain that transmits the same MBS.
  • the MBS can still be received continuously.
  • the access information under the target base station is notified to the terminal in advance by means of network assistance.
  • the target base station and/or the target gateway acquires the identifier of the MBS received by the terminal by using the handover request message sent by the source base station and/or the source gateway, and adds the context information of the terminal in advance when the handover starts, and the base station without the MBS transmission beforehand
  • the transmission bearer and the MBS key information are established, and the process of receiving the MBS after the terminal moves to the target base station is accelerated.
  • the target base station and/or the target gateway access the target base station, the corresponding bearer is established and the MBS key information is acquired and the context information of the terminal is added, thereby avoiding that the terminal does not eventually access the target base station.
  • the resulting resources are wasted.
  • the target base station After the terminal accesses the target base station, the target base station notifies the source base station through the target gateway and the source gateway. Deleting the context information of the terminal and the context information about the terminal of the MBS. If the target gateway is not the same gateway as the source gateway, the target gateway notifies the source gateway to delete the context information of the terminal and the MBS about the terminal. Contextual information to conserve system resources.
  • the MBS service bearer is established based on the MBS domain, when the target base station of the terminal and the source base station are in the same MBS domain, the MBS service-related information needs to be included in the delivered terminal context without the process of establishing the MBS service bearer. Further ensuring that the terminal can continuously receive the MBS after switching to different base stations.

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

Abstract

L'invention concerne un système WIMAX et un procédé de transfert de terminal pour assurer une continuité de service MBS durant un transfert de terminal en mode actif dans un système WIMAX. Il s'agit, selon l'invention, d'acquérir un identificateur MBS auprès d'une station de base source et/ou d'une passerelle source, par une station de base cible et/ou une passerelle cible pendant un transfert de terminal, puis de redistribuer le MBS correspondant à un tel identificateur MBS et de recevoir, en provenance de la station de base cible, le MBS correspondant à un tel identificateur MBS, une fois le transfert de terminal effectué vers la station de base cible. Si la station de base cible et/ou la passerelle cible n'ont pas reçu le service MBS correspondant à un tel identificateur MBS, il est prévu de mettre en place un service de transmission allant du serveur MBS à la passerelle cible, puis à la station de base cible. Si la station de base cible et la station de base source ne font pas partie de la même zone MBS, la station de base cible redistribue au terminal les informations pertinentes de l'identificateur MBS reçu par la station de base cible.
PCT/CN2007/070756 2006-10-12 2007-09-24 Système wimax et procédé de transfert de terminal et station de base appropriée WO2008046337A1 (fr)

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CN200610139126 2006-10-12
CN2007100048462A CN101163334B (zh) 2006-10-12 2007-02-02 微波接入全球互通系统及其终端切换方法
CN200710004846.2 2007-02-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9137720B2 (en) 2010-01-04 2015-09-15 Thomson Licensing Handover method of multicast and broadcast service based on buffer fullness
US20230020443A1 (en) * 2020-03-18 2023-01-19 Huawei Technologies Co., Ltd. Message forwarding method and apparatus
EP4199582A4 (fr) * 2020-08-14 2024-02-21 Datang mobile communications equipment co ltd Procédé de transmission de données mbs, appareil côté réseau et dispositif

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101674526B (zh) * 2008-09-09 2015-04-01 中兴通讯股份有限公司 Mbs的移动性管理方法、及终端的mbs的切换方法
CN101577911B (zh) * 2008-09-19 2011-09-21 中兴通讯股份有限公司 切换方法和系统
CN101686539B (zh) 2008-09-26 2013-04-17 华为技术有限公司 一种去注册方法、室内基站和室内基站网关
CN102111748B (zh) * 2009-12-28 2014-04-30 中兴通讯股份有限公司 本地ip连接建立方法及系统
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CN102281599B (zh) * 2010-06-09 2016-03-30 中兴通讯股份有限公司 Wimax系统中重接入时业务流部分接纳失败的处理方法和基站
CN102547845B (zh) * 2010-12-10 2015-10-21 中兴通讯股份有限公司 一种标识网中移动节点切换时数据报文的管理方法及系统
CN103379442B (zh) * 2012-04-20 2016-06-22 中兴通讯股份有限公司 预同步式及反应式组播切换的方法及装置
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CN111526553A (zh) * 2020-05-13 2020-08-11 腾讯科技（深圳）有限公司 Ue执行的方法及ue、以及smf实体执行的方法及smf实体
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CN114205754B (zh) * 2020-09-17 2023-09-22 维沃移动通信有限公司 Bwp切换方法和终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1496159A (zh) * 2002-08-17 2004-05-12 ���ǵ�����ʽ���� 移动通信系统中在切换期间发送/接收数据的设备和方法
CN1549611A (zh) * 2003-05-11 2004-11-24 北京三星通信技术研究有限公司 Mbms业务上下文更新的方法
WO2006011763A2 (fr) * 2004-07-29 2006-02-02 Lg Electronics Inc. Procede permettant de fournir et de recevoir un service de radiodiffusion et de multidiffusion pendant le transfert intercellulaire dans un systeme d'acces sans fil a large bande
CN1845527A (zh) * 2005-11-02 2006-10-11 华为技术有限公司 在微波接入全球互通系统中提供组播业务的方法及系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050007823A (ko) * 2003-07-11 2005-01-21 에스케이 텔레콤주식회사 멀티미디어 방송/멀티캐스트 서비스를 제공하는 이동통신시스템에서 ｓｇｓｎ 간에 소프트 핸드오버가 발생하는경우 연속적 서비스를 제공하는 방법 및 시스템

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1496159A (zh) * 2002-08-17 2004-05-12 ���ǵ�����ʽ���� 移动通信系统中在切换期间发送/接收数据的设备和方法
CN1549611A (zh) * 2003-05-11 2004-11-24 北京三星通信技术研究有限公司 Mbms业务上下文更新的方法
WO2006011763A2 (fr) * 2004-07-29 2006-02-02 Lg Electronics Inc. Procede permettant de fournir et de recevoir un service de radiodiffusion et de multidiffusion pendant le transfert intercellulaire dans un systeme d'acces sans fil a large bande
CN1845527A (zh) * 2005-11-02 2006-10-11 华为技术有限公司 在微波接入全球互通系统中提供组播业务的方法及系统

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9137720B2 (en) 2010-01-04 2015-09-15 Thomson Licensing Handover method of multicast and broadcast service based on buffer fullness
US20230020443A1 (en) * 2020-03-18 2023-01-19 Huawei Technologies Co., Ltd. Message forwarding method and apparatus
US11979247B2 (en) * 2020-03-18 2024-05-07 Huawei Technologies Co., Ltd. Message forwarding method and apparatus
EP4199582A4 (fr) * 2020-08-14 2024-02-21 Datang mobile communications equipment co ltd Procédé de transmission de données mbs, appareil côté réseau et dispositif

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