WO2013037276A1 - 一种中继节点切换方法、基站和通讯系统 - Google Patents

一种中继节点切换方法、基站和通讯系统 Download PDF

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Publication number
WO2013037276A1
WO2013037276A1 PCT/CN2012/081086 CN2012081086W WO2013037276A1 WO 2013037276 A1 WO2013037276 A1 WO 2013037276A1 CN 2012081086 W CN2012081086 W CN 2012081086W WO 2013037276 A1 WO2013037276 A1 WO 2013037276A1
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WO
WIPO (PCT)
Prior art keywords
base station
information
relay node
target base
tnl
Prior art date
Application number
PCT/CN2012/081086
Other languages
English (en)
French (fr)
Inventor
王可
彭炎
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
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12832620.4A priority Critical patent/EP2747482B1/en
Publication of WO2013037276A1 publication Critical patent/WO2013037276A1/zh
Priority to US14/203,067 priority patent/US9179376B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0064Transmission or use of information for re-establishing the radio link of control information between different access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0077Transmission or use of information for re-establishing the radio link of access information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/04Terminal devices adapted for relaying to or from another terminal or user
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/34Modification of an existing route
    • H04W40/36Modification of an existing route due to handover
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a communication system for relay node handover. Background technique
  • the wireless connection between the base station and the user equipment is a direct wireless connection, that is, a single-hop network connection.
  • the relay technology is to add one or more relay nodes (hereinafter referred to as RNs) between the base station and the UE, and is responsible for forwarding the wireless signals sent by the base station to the UE after one or more signals are forwarded.
  • RNs relay nodes
  • the base station may be referred to as a donor base station (English: donor eNB, abbreviated as DeNB), and the base station may control the RN.
  • the radio link between the base station and the UE is divided into a base station to the RN, and two radio links from the RN to the UE, to obtain higher link capacity and more. Good coverage.
  • the radio link from the base station to the RN may be referred to as a backhaul link (in English: backhaul link), and the radio link from the RN to the UE is referred to as an access link.
  • the present invention provides a relay node handover method, a base station, and a communication system to solve the problem that a relay node switches from a source base station to a target base station when the relay node moves.
  • An aspect of the present invention provides a method for switching a relay node, including:
  • the target base station receives a handover request sent by the source base station serving the relay node;
  • the target base station acquires first transmission network layer TNL information from the source base station; and the target base station establishes a connection with the relay node according to the first TNL information.
  • a base station including:
  • a processor configured to determine to switch a relay node served by the base station to a target base station, and a transmitter, configured to send a handover request and first transmission network layer TNL information to the target base station, so that the target base station is configured according to the The first TNL information establishes a connection with the relay node.
  • a base station including:
  • a receiver configured to receive a handover request and a first transmission network layer TNL information sent by a source base station serving the relay node;
  • a processor configured to establish a connection with the relay node according to the first TNL information.
  • Another aspect of the present invention provides a communication system, including:
  • target base station can implement an action performed by the target base station in the foregoing relay node handover method
  • the source base station may implement an action performed by the source base station in the foregoing relay node handover method.
  • the present invention implements the handover of the relay node from the source base station to the target base station by using the TNL information transmitted by the source base station to the target base station in the scenario of the relay node moving, thereby ensuring the connection establishment of the relay node and the target base station.
  • FIG. 1 is a schematic diagram of a network scenario with a relay node according to the present invention
  • FIG. 2 is a schematic diagram of another network scenario with a relay node according to the present invention.
  • FIG. 3 is a schematic flowchart of a method for switching a relay node according to a first embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for switching a relay node according to a second embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for switching a relay node according to a third embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to a fifth embodiment of the present invention. detailed description
  • a terminal a device that provides voice and/or data connectivity to a user, including a wireless terminal or a wireless terminal.
  • the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, and a mobile terminal that communicates with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the wireless terminal can be a mobile station (English: mobile station), an access point (English: access point), or a user equipment (English: user equipment, referred to as UE).
  • UE user equipment
  • a base station may refer to a device in an access network that communicates with a wireless terminal over one or more cells over an air interface.
  • the base station may be a base station in GSM or CDMA (base transceiver station, BTS for short), or a base station in WCDMA (in English: NodeB), or an evolved base station in LTE (in English: Evolutional Node B, Jane The eNB or the e-NodeB, or the base station in the subsequent evolved network, is not limited by the present invention.
  • system and “network” are often used interchangeably herein.
  • the term “and/or,” is merely an association describing an associated object, indicating that there may be three relationships.
  • a and / or B can mean: There are three cases of A, A and B, and B alone.
  • the character "/" in this article generally means that the contextual object is an "or" relationship.
  • the network scenario of the different embodiments of the present invention may be applied to a communication network including at least one relay node.
  • the application is applied to the two-hop relay network architecture as an example.
  • the embodiment of the present invention may also be applied to multiple hops.
  • the relay node RNs (RN1 to RN3) access the network through two base stations, respectively.
  • the UEs (UE1-UE4) are respectively attached to the RNs (RN1 to RN3), and the UE5 is directly attached to the base station.
  • the RN may establish a connection with a mobility management entity (MME) to transmit control signaling.
  • MME mobility management entity
  • the RN also establishes a connection with the service gateway (English: service gateway, S-GW for short) to transmit user plane data.
  • the service gateway (English: service gateway, S-GW for short) to transmit user plane data.
  • the base station may be a macro base station or a micro base station, but embodiments of the present invention are not limited thereto.
  • the network scenario of the different embodiments of the present invention is as shown in FIG. 2, wherein the interface between each base station and the UE, and the interface between the RN and the UE are both air interfaces (Un interface), and the Un interface is mainly used for control plane signaling. And the transfer of user plane data.
  • base stations can be connected through an X2 interface. After the RN is introduced, there is an S 1 /X2 interface between the RN and the base station. Therefore, the base station will provide a proxy function for the S1/X2 interface between the RN and other network nodes.
  • the air interface protocol stack consists of two layers, namely the access stratum (English: access stratum, AS for short) and the transport network layer (transport network layer, TNL for short).
  • the AS layer includes: a physical layer (English: physical layer, referred to as PHY), media access control (English: media access control, MAC for short), and wireless link control (English: radio link control, abbreviation RLC), and packet data convergence protocol (in English: packet data convergence protocol, PDCP for short).
  • the TNL layer is composed of the following One or more protocol layers: IP, stream control transmission protocol (English: stream control transmission protocol, referred to as SCTP), and user data protocol (English: use datagram protocol, UDP for short).
  • the S1/X2 interfaces are carried on the corresponding TNL, where: the user plane data of the S1/X2 interface is carried on the UDP/IP.
  • the control plane signaling of the S1/X2 interface is carried on SCTP/IP.
  • UDP For UDP, this is based on the connectionless transport layer protocol, that is, between the RN and the source base station, or between the RN and the target base station, the transmission of user plane data based on UDP does not need to pass the set communication channel or path. get on. Therefore, when the RN switches to the target base station, there is no need to reestablish the connection for the UDP between the target base station and the RN.
  • SCTP this is a connection-based transport layer protocol, that is, between the RN and the source base station, or between the RN and the target base station, the transmission of control signaling based on the SCTP needs to be performed through a predetermined communication channel or path.
  • the communication channel may be SCTP coupled.
  • SCTP coupling refers to a logical connection or path for data transmission established by a four-step handshake mechanism established by the SCTP protocol between two SCTP endpoints, and details are not described herein.
  • the RN handover method provided by the first embodiment of the present invention includes: S301: The target base station receives a handover request sent by a source base station serving the RN;
  • the target base station acquires transport network layer TNL information from the source base station.
  • the target base station establishes a connection with the RN according to the TNL information.
  • the source base station when the RN provides a handover request to the source base station, the source base station confirms the target base station according to the measurement report reported by the RN, and sends a handover request to the target base station, for switching the RN.
  • the source base station may also actively confirm the target base station according to the cell load condition, and send a handover request to the target base station, for switching the RN.
  • the TNL information may be SCTP coupled information and/or user plane transport address information.
  • the SCTP coupling information includes one or more of the following information:
  • the primary path address of the RN and the source base station is the primary path address of the RN and the source base station.
  • the transport address list of the control plane of the RN has at least one control plane transport address information of the RN.
  • the foregoing transport address information may be an IP address of a control plane of the RN, an SCTP port address of the RN, or a combination of the two.
  • the control plane transmission address may be a route for transmitting a data packet based on a control plane, or may be another address for transmitting RN control plane signaling, and details are not described herein again.
  • the transport address list of the control plane of the source base station includes at least one control plane transport address information of the source base station.
  • the foregoing transport address information may be an IP address of a control plane of the source base station, an SCTP port address of the source base station, or a combination of the two.
  • the control plane transmission address may be a route for transmitting a data packet based on a control plane, or may be another address for transmitting RN control plane signaling, and details are not described herein again.
  • the primary path IP address is a path address of the control plane signaling between the source base station and the RN, and includes a control plane transmission address selected by the transport address list of the control plane of the RN, and / or a control plane transport address selected from the transport address list of the control plane of the source base station. Based on the path address, the source base station and the RN can transmit control plane signaling on the SCTP coupling.
  • the target base station may obtain the transport addresses of the control planes of the RN and the source base station from the transport address list of the control plane of the RN and the transport address list of the control plane of the source base station, and perform the transport address based on the transport address.
  • the connection of the target base station to the RN may directly use the acquired RN and the primary path address of the source base station, and perform the connection between the target base station and the RN based on the primary path address.
  • the transport address list of the control plane of the RN acquired by the target base station and/or the transport address of the other control plane in the transport address list of the control plane of the source base station may be used as the alternate path address between the target base station and the RN (in English: Secondary path IP address), for When the control plane signaling cannot be transmitted on the primary path, the primary path for transmitting the SCTP control plane signaling between the base station and the RN is switched to the alternate path.
  • the user plane transmits the address information
  • the source base station and the user plane of the RN transmit the address information
  • the transmission address information of the user plane may be an IP address of a source base station and a user plane of the RN, or may be a source base station and a port address of a user plane of the RN, or a combination of the two. It can be understood by those skilled in the art that the transmission address of the user plane may be a route for sending a data packet based on the control plane, and may also be another address for transmitting user plane data between the source base station and the RN, and details are not described herein. .
  • control plane transmission address and the user plane transmission address of the RN may be the same or different.
  • control plane transmission address and the user plane transmission address of the source base station may be the same or different, and the present invention is This is not limited.
  • the source base station may send the foregoing TNL information in the handover request to the target base station.
  • the source base station may also send the TNL information to other target messages or cells to send to the target base station.
  • the source base station may send the TNL information in the sequence number status transmission message to the target base station.
  • the source base station may also send a separate message or a cell to the target base station, where the message or the cell carries the TNL information, which is not limited by the present invention.
  • the target base station or the RN establishes a TNL connection between the target base station and the RN according to the TNL information, including establishing an SCTP coupling and/or user plane between the target base station and the RN. Connection.
  • the RN accesses the cell under the target base station, and the RN randomly accesses the cell under the target base station, and the RN can receive the scheduling information of the target base station in the cell.
  • the target base station or the RN may immediately initiate a connection between the target base station and the RN.
  • the target base station or the RN may transfer the primary path between the source base station and the RN to the target base station and the RN according to the TNL information, for example, according to the primary path address of the RN and the source base station, where the target base station passes the The first primary path connects to the RN.
  • the target base station can perform configuration on the target base station side before establishing the SCTP coupling between the target base station and the RN. It can be understood by those skilled in the art that the configuration of the target base station side may be configured on the target base station side according to the SCTP coupling information according to the SCTP coupling information, and is not described here.
  • the SCTP coupling information used by the target base station to perform configuration on the target base station side may also include, but is not limited to, the following parameters:
  • the error count is used to indicate the transmission error count of the current target base station;
  • the error threshold (Error Threshold) is used to indicate the error threshold of the current target base station, for example, when the error count exceeds the above error threshold, the above is considered
  • the SCTP-coupled control plane transport address cannot be transmitted to the target base station.
  • the parameters of the SCTP coupling information used by the target base station for configuration are not limited thereto, as long as the target base station can correctly obtain the SCTP connection status between the source base station and the RN, and implement the SCTP connection status according to the foregoing.
  • the parameters that the RN synchronizes from the source base station to the target base station may be omitted.
  • the RN accesses the cell under the target base station, and when the RN or the target base station transmits data to the opposite end, the target base station or the RN is triggered to initiate a connection between the target base station and the RN. .
  • the TNL information transmitted by the source base station to the target base station is configured on the target base station side, and the RN is switched from the source base station to the target base station, thereby ensuring the connection establishment between the RN and the target base station.
  • the RN switching method of the second embodiment of the present invention is as shown in FIG. 4, and includes:
  • the target base station receives a handover request sent by a source base station serving the RN.
  • the target base station acquires SCTP coupling information from the source base station.
  • the SCTP coupling information may be referred to the related description in the first embodiment, and details are not described herein again.
  • the SCTP coupling information and the user plane transmission address information of the RN, the target base station, and the source base station may remain unchanged in a pre-configured manner.
  • the SCTP coupling information and the user plane transmission address information of the RN, the target base station, and the source base station are defined by the operator to keep the SCTP coupling unchanged.
  • the SCTP coupling information transmitted by the source base station to the target base station includes Two separate SCTP couplings of the above X2/S1 interface.
  • the target base station performs configuration on the target base station side according to the SCTP coupling information.
  • the SCTP coupling information and the user plane transmission address of the RN, the target base station, and the source base station are all maintained unchanged in a pre-configured manner or an operator-defined manner, and the source base station does not need to transmit the user plane address.
  • the SCTP coupling information of the source base station side is sent to the target base station, so that the target base station correctly acquires the SCTP connection status between the source base station and the RN, and synchronizes the RN from the source base station to the target according to the SCTP connection status.
  • Base station Sending to the target base station, the SCTP coupling information of the source base station side is sent to the target base station, so that the target base station correctly acquires the SCTP connection status between the source base station and the RN, and synchronizes the RN from the source base station to the target according to the SCTP connection status. Base station.
  • the foregoing main path may be stopped.
  • Information transmission such as stopping the transmission of information related to the heartbeat mechanism.
  • the target base station transfers the primary path between the source base station and the RN to the target base station and the RN according to the SCTP coupling information. And establishing connection establishment between the RN and the target base station.
  • the target base station implements a connection between the target base station and the RN through a trigger mechanism according to the primary path address in the SCTP coupling information, to restore SCTP coupling and control plane signaling carried over the SCTP coupling. transmission.
  • the triggering mechanism may be that the transmission of the control plane signaling that needs to be carried on the SCTP coupling is implicitly indicated that the SCTP coupling has resumed connectivity.
  • the initiator of the transmission control plane signaling can be an RN or a target base station.
  • the receiving party is the target base station or the RN, which is not limited by the present invention.
  • the target base station sends control plane signaling on the SCTP coupling to the RN on the primary path based on the primary path address
  • the RN can receive the SCTP coupling between the target base station and the RN when receiving the control plane signaling. A connection has been established.
  • the target base station when the target base station sends control plane signaling on the SCTP coupling to the RN on the primary path, and the RN cannot receive the control plane signaling, it indicates that the SCTP coupling between the target base station and the RN has not been established yet.
  • the SCTP coupling state information of the source base station and the RN need to be forwarded to the target base station in advance in the process of handover preparation, so that the Un interface can be made.
  • the SCTP coupling state on the top is not affected.
  • the RN switching method of the third embodiment of the present invention includes:
  • S501 The source base station serving the RN sends a handover request to the target base station.
  • the source base station sends the first transport network layer TNL information to the target base station.
  • the first TNL information includes first SCTP coupling information and/or first user plane transmission address information.
  • the first SCTP coupling information and/or the first user plane transmission address information may refer to the related descriptions of the SCTP coupling information and/or the user plane transmission address information in the first embodiment, and details are not described herein again.
  • the source base station may decide whether to switch the RN to the target base station, and send the first TNL information to the target base station. It can be understood by those skilled in the art that the source base station can also decide whether to switch the RN to the target base station and send the first TNL information to the target base station, which is not limited by the present invention.
  • the target base station sends the second transport network layer TNL information to the source base station according to the first transport network layer TNL information.
  • the target base station when the SCTP coupling of any one of the RN, the target base station, and the source base station, or the user plane transmission address of any one of the RN, the target base station, and the source base station changes, that is, when the RN Transmission address list of the control plane, transmission address of the control plane of the source base station a list, a transport address list of the control plane of the target base station, and at least one of the RN and a primary path address of the source base station are changed; or, the source base station and the user plane transport address of the RN
  • the target base station sends the second TNL information to the source base station according to the first TNL information.
  • the second TNL information includes second SCTP coupling information and/or second user plane transmission address information.
  • the second SCTP coupling information is configured by the target base station and includes one or more of the following information:
  • the target base station may configure the second SCTP coupling information, and update the second SCTP.
  • the coupling information is sent to the source base station. For example, when the source base station transmits the current SCTP coupling information of the source base station/RN to the target base station, the target base station finds any one of the control plane transmission addresses of the RN/source base station and the transmission used by the target side according to the local configuration of the target base station side.
  • the target base station When the address conflicts, or when any control plane transmission address of the RN/source base station cannot be used in the local transmission network configured on the target side (for example, any control plane transmission address of the RN/source base station and the transmission address used by the target side) Not the address in the same IP subnet), the target base station sends the updated second SCTP coupling information to the source base station.
  • the configuration of the second SCTP coupling information by the target base station may be that the target base station reconfigures the second SCTP coupling information according to actual conditions, and may also select the existing parameters to update the second SCTP information for the target base station.
  • the invention is not limited thereto.
  • the second user plane transmission address information transmitted by the target base station to the source base station is a user plane transmission address between the source base station and the RN configured via the target base station and confirmed by the source base station.
  • the target base station finds that the user plane transmission address of the source base station/RN is unavailable according to the local configuration of the target base station side (for example, any user plane transmission address of the RN/source base station conflicts with the transmission address used by the target side, or
  • the target base station transmits the updated source base station and/or the user plane transport address of the RN to the source base station.
  • the target base station may send a handover request acknowledgement message indicating that the second TNL information is sent to the source base station.
  • the target base station may confirm that the first TNL information cannot be used and needs to send updated TNL information to the source base station, the source base station may be correspondingly indicated by the handover request acknowledgement message, and the second TNL information is transmitted to the source. Base station.
  • the RN receives the data through the source base station. Forwarding.
  • the source base station sends an S1 message or an RRC message indicating that the second TNL information is sent to the RN.
  • the S1 message may be a message carrying the S1 interface control plane signaling, such as a message carrying the S1AP signaling
  • the RRC message may be an RRC connection reconfiguration message or an RRC downlink transmission message.
  • a transparent container or a cell for indicating the second TNL information may be added to the S1 message or the RRC connection reconfiguration message for carrying the updated SCTP coupling information and/or the user plane transport address.
  • the source base station sends third transport network layer TNL information to the target base station according to the second transport network layer TNL information.
  • the source base station adds a second primary path between the RN and the source base station according to the updated control plane transmission address and/or the second primary path address, for SCTP coupling when the RN switches to the target base station.
  • the SCTP coupling of the control plane signaling between the source base station and the RN is still the first primary path, that is, the transmission control plane signaling is still transmitted on the first primary path.
  • the third TNL information is the third SCTP coupling information and/or the second user plane. Transfer address information.
  • the third SCTP coupling information is confirmed by the source base station, and includes one or more of the following information:
  • the RN and the second primary path address of the source base station are identical to The RN and the second primary path address of the source base station.
  • the transport address list of the control plane of the RN in the third SCTP coupling information may be the same as the transport address list of the control plane of the RN in the second SCTP coupling information. It can also be different. Similarly, the transport address list of the control plane of the source base station in the third SCTP coupling information may be the same as or different from the transport address list of the control plane of the source base station in the second SCTP coupling information, and the present invention does not do this. limited.
  • the target base station receives a sequence number status transmission message that is sent by the source base station according to the second TNL information and includes the third TNL information.
  • the above sequence number status transmission message may be a synchronous status transmission message.
  • the updated SCTP coupling state information and/or the user plane transmission address information needs to be notified to the target base station, so
  • the third TNL information is delivered using the synchronization status transfer message described above.
  • a transparent container or signaling for indicating a third TNL connection state may be added to the synchronization state transmission message for carrying the updated SCTP coupling information and/or user plane transmission address information.
  • the target base station establishes a connection with the target base station according to the third transport network layer TNL information.
  • the target base station establishes a connection with the RN based on the second user plane transmission address information.
  • the target base station transfers the second primary path between the source base station and the RN to the third SCTP coupling information to Between the target base station and the RN, the target base station is connected to the RN by using the second primary path.
  • the target base station switches the transmission of the control plane signaling from the first primary path to the second primary path according to the third SCTP coupling information, and performs the target base station by using the second primary path. Connection to the RN.
  • the switching of the control plane signaling on the first primary path and the second primary path may include the following two methods:
  • the source base station may transmit the communication information on the first primary path based on the first primary path address (in the present In an embodiment, the communication information may be controlled by control plane signaling to be transmitted on a second primary path based on the second primary path address. Then, the source base station deletes the first main path.
  • the target base station first transfers the first primary path and the second primary path between the RN and the source base station to the RN and the target base station. Subsequently, the target base station switches the communication information transmitted on the first primary path based on the first primary path address to the second primary path based on the second primary path address, and deletes the first primary path.
  • the target base station performs configuration on the target base station side, such as configuration of the protocol stack, or before the RN successfully switches to the target base station.
  • the information transmission on the first primary path or the second primary path stops the transmission of information related to the heartbeat mechanism.
  • the target base station is directed to the source.
  • the source base station sends the third TNL information confirmed by the source base station to the target base station, so as to implement the handover of the RN from the source base station to the target base station, thereby ensuring the connection establishment of the RN and the target base station.
  • the fourth embodiment of the present invention provides a base station, and the main structure thereof is as shown in FIG. 6, and includes: a receiver 61, configured to: Receiving a handover request and a first transmission network layer TNL information sent by a source base station serving the RN; and
  • the processor 62 is configured to establish a connection with the RN according to the first TNL information.
  • the processor is further configured to configure the second TNL information, where the second TNL information includes the second SCTP coupling information and/or The second user plane transmits the address information.
  • the base station further includes a transmitter 63, configured to send second TNL information to the source base station according to the first TNL information.
  • the receiver 61 is further configured to receive third TNL information that is sent by the source base station according to the second TNL information, where the third TNL information is confirmed by the source base station.
  • the base station may implement the actions performed by the target base station in the RN handover method of the first to third embodiments, for example, the receiver 61 may perform the action of S101 in the first embodiment. Therefore, in this embodiment, the handover of the RN from the source base station to the target base station is implemented for the scenario in which the RN moves, thereby ensuring the connection establishment between the RN and the target base station.
  • a fifth embodiment of the present invention provides a base station, which may be configured as shown in FIG. 7, and includes: a processor 71, configured to determine to switch an RN served by the base station to a target base station;
  • the transmitter 72 is configured to send a handover request and first TNL information to the target base station, so that the target base station establishes a connection with the RN according to the first TNL information.
  • the first TNL information includes: a first flow control transmission protocol SCTP coupling information and/or a first user plane transmission address information.
  • the first SCTP coupling information includes at least one of the following information: a list of transport addresses of the control plane of the RN;
  • the first primary path address of the RN and the base station is the first primary path address of the RN and the base station.
  • the base station further includes a receiver 73, configured to: when the target base station confirms that at least one control plane transmission address of the control plane transmission address of the base station and the control plane transmission address of the RN is unavailable, and/or Receiving, by the target base station, the second TNL sent by the target base station to the base station according to the first TNL information, when at least one of the user plane transmission address of the base station and the user plane transmission address of the RN is unavailable.
  • the second TNL information includes second SCTP coupling information and/or second user plane transmission address information configured by the target base station.
  • the transmitter 72 is further configured to send third TNL information to the target base station according to the second TNL information, where the third TNL information includes third SCTP coupling information confirmed by the base station, and/or The second user plane transmits address information.
  • the second SCTP coupling information configured by the target base station includes at least one of the following information:
  • the third SCTP coupling information confirmed by the base station includes at least one of the following information: a transport address list of the control plane of the RN;
  • the second primary path address of the RN and the base station is the same.
  • the processor 71 is further configured to confirm the third SCTP coupling information and/or the second user plane transmission address information.
  • the transmitter 72 is further configured to send an S1 message or a radio resource control RRC message to the RN, where the S1 message or the RRC message includes the second TNL information.
  • the base station may implement the actions performed by the source base station in the RN handover methods of the first to third embodiments, for example, the transmitter 72 may perform the action of S501 in the third embodiment. Therefore, in this embodiment, the RN moves from the source base station to the target base station, so as to ensure the connection establishment between the RN and the target base station.
  • a sixth embodiment of the present invention provides a communication system including a relay node, a mobility management entity, a target base station, and a source base station.
  • the target base station may be the base station in the fourth embodiment to implement the actions performed by the target base station in the RN handover methods of the first to third embodiments.
  • the source base station may be the base station in the fifth embodiment to implement the actions performed by the source base station in the RN handover methods of the first to third embodiments described above.
  • the handover of the RN from the source base station to the target base station is implemented for the scenario in which the RN moves, thereby ensuring the connection establishment between the RN and the target base station.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the embodiments may be combined into one module, or may be further split into multiple sub-modules.
  • the division of the device modules in the embodiments of the present invention is a functional division, and the actual specific structure may be the splitting or merging of the above functional modules.

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Abstract

本发明涉及通信技术领域,提供一种中继节点切换方法,包括:目标基站接收服务于中继节点的源基站发送的切换请求;所述目标基站从所述源基站获取第一传输网络层(TNL)信息;及所述目标基站根据所述第一TNL信息与所述中继节点建立连接。本发明还提供一种基站和通讯系统。本发明可以实现中继节点从源基站至目标基站的切换,从而保证了中继节点与目标基站间的连接建立。

Description

一种中继节点切换方法、 基站和通讯系统 技术领域
本发明涉及通信技术领域, 具体涉及一种中继节点切换的方法、 基站、 和通讯系统。 背景技术
在传统网络中, 基站和用户设备 (英文为: User Equipment, 简称 UE ) 之间的无线连接是直接的无线连接, 也就是单跳的网络连接。 而中继技术 是在基站和 UE之间增加一个或多个中继节点 (英文为: relay node, 简称 RN ), 用于负责将基站发送的无线信号做一次或多次信号转发后到达 UE。 当在基站和 UE之间具有 RN时,上述基站可以称为施主基站(英文为: donor eNB, 简称 DeNB ), 上述基站可以对 RN进行控制。 以较简单的两跳中继 网络架构为例, 将基站与 UE之间的无线链路分割为基站到 RN, 以及 RN 到 UE的两条无线链路, 以获得更高的链路容量以及更好的覆盖。 其中, 基 站到 RN的无线链路可以称为回程链路(英文为: backhaul link ), 而 RN到 UE的无线链路称为接入链路。
目前, 业界期盼一种有效的实现方式, 当 RN发生移动的时候, 可以 实现 RN在多个基站之间的切换。 发明内容
本发明提供一种中继节点切换方法、 基站和通讯系统, 以解决当中继 节点移动时, 中继节点从源基站切换到目标基站的问题。
本发明一方面提供一种中继节点切换方法, 包括:
目标基站接收服务于中继节点的源基站发送的切换请求;
所述目标基站从所述源基站获取第一传输网络层 TNL信息; 及 所述目标基站根据所述第一 TNL信息与所述中继节点建立连接。 本发明另一方面提供一种基站, 包括:
处理器, 用于决定将所述基站服务的中继节点切换至目标基站; 发射机, 用于向所述目标基站发送切换请求及第一传输网络层 TNL信 息,以便于所述目标基站根据所述第一 TNL信息与所述中继节点建立连接。
本发明又一方面提供一种基站, 包括:
接收机, 用于接收服务于中继节点的源基站发送的切换请求及第一传 输网络层 TNL信息; 及
处理器, 用于根据所述第一 TNL信息与所述中继节点建立连接。
本发明再一方面提供一种通讯系统, 包括:
目标基站, 所述目标基站可实现上述中继节点切换方法中目标基站所 执行的动作; 及
源基站, 所述源基站可实现上述中继节点切换方法中源基站所执行的 动作。
本发明针对中继节点移动的场景, 通过源基站向目标基站传送的 TNL 信息, 实现了中继节点从源基站至目标基站的切换, 从而保证中继节点与 目标基站的连接建立。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附 图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出 创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1 为本发明的一具有中继节点的网络场景示意图;
图 2 为本发明的另一具有中继节点的网络场景示意图;
图 3为本发明第一实施例一种中继节点切换方法的流程示意图; 图 4 为本发明第二实施例一种中继节点切换方法的流程示意图; 图 5 为本发明第三实施例一种中继节点切换方法的流程示意图; 图 6为本发明第四实施例一种基站的结构示意图;
图 7 为本发明第五实施例一种基站的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动的前 提下所获得的所有其他实施例, 都属于本发明保护的范围。
本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图中 的模块或流程并不一定是实施本发明所必须的。
本文中结合终端和 /或基站来描述各种方面。
终端, 指向用户提供语音和 /或数据连通性的设备, 包括无线终端或有 线终端。 无线终端可以是具有无线连接功能的手持式设备、 或连接到无线 调制解调器的其他处理设备, 经无线接入网与一个或多个核心网进行通信 的移动终端。 例如, 无线终端可以是移动电话(或称为"蜂窝"电话)和具有 移动终端的计算机。 又如, 无线终端也可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移动装置。 再如, 无线终端可以为移动站 (英文 为: mobile station )、 接入点 (英文为: access point )、 或用户装备 (英文为: user equipment , 简称 UE )等。 为便于叙述, 本发明的各实施例将以 UE为例 加以描述。
基站, 可以是指接入网中在空中接口上通过一个或多个小区与无线终 端通信的设备。 例如, 基站可以是 GSM或 CDMA中的基站 (英文为: base transceiver station , 简称 BTS ) , 也可以是 WCDMA中的基站 (英文为: NodeB ), 还可以是 LTE中的演进型基站 (英文为: evolutional Node B, 简 称 eNB或 e-NodeB ), 或者是后续演进网络中的基站, 本发明对此并不做限 定。
另外, 本文中术语"系统,,和"网络"在本文中常被可互换使用。本文中术 语"和 /或,,, 仅仅是一种描述关联对象的关联关系, 表示可以存在三种关系, 例如, A和 /或 B , 可以表示: 单独存在 A, 存在 A和 B , 单独存在 B这三种情 况。 另外, 本文中字符" /", 一般表示前后关联对象是一种"或"的关系。
本发明不同实施例的网络场景可以应用于包括至少一个中继节点的 通信网络, 为方便起见, 以应用于两跳中继网络架构为例进行说明, 本 发明实施例也可以适用于多跳中继网络架构。 如图 1所示, 中继节点 RN(RN1至 RN3) 分别通过两个基站接入网络, UE(UE1-UE4)分别附着在 RN(RN1至 RN3)下, UE5直接附着在基站下。 在 RN入网的过程中, RN可以 和移动管理实体(英文为: mobile management entity, 简称 MME )建立连 接, 以传输控制信令。 同时, RN也会和业务网关(英文为: service gateway, 简称 S-GW )建立连接, 以传输用户面数据。 本领域的技术人员可以理解, 所述基站可以为宏基站或者为微基站, 但本发明各实施例并不仅限于此。
本发明不同实施例的网络场景如图 2所示, 其中, 各基站与 UE间的接 口, 以及 RN与 UE间的接口都属于空口 (简称 Un接口) , 上述 Un接口主要 用于控制面信令以及用户面数据的传送。 以 LTE技术为例, 基站之间可以 通过 X2接口相连接。 在引入 RN之后, RN和基站之间存在 S 1 /X2接口, 因 此, 基站将为 RN和其他网络节点之间提供 S1/X2接口的代理功能。
对 RN而言, 其空口协议栈包含了 2个层次, 分别为接入层 (英文为: access stratum, 简称 AS )、 及传输网络层 (英文为: transport network layer, 简称 TNL )。 其中, 所述 AS层包括: 物理层(英文为: physical layer, 简称 PHY ), 媒体接入控制 (英文为: media access control, 简称 MAC )、 无线链 路控制 (英文为: radio link control, 简称 RLC )、 及分组数据汇聚协议(英 文为: packet data convergence protocol, 简称 PDCP)。 所述 TNL层由下列一 个或多个协议层组成: IP、 流控制传输协议 (英文为: stream control transmission protocol,简称 SCTP )、及用户数据才艮协议(英文为: use datagram protocol, 简称 UDP )。
例如, 在图 1和图 2所示的场景中, 具体而言, 上述 S1/X2接口都是承载 在对应的 TNL上的,其中: S1/X2接口的用户面数据承载在 UDP/IP上, S1/X2 接口的控制面信令承载在 SCTP/IP上。
对 UDP而言, 这是基于无连接的传输层协议, 也就是说, 在 RN与源基 站、 或 RN与目标基站间, 基于 UDP上用户面数据的传送不需要通过设定的 通讯通道或路径进行。 故, 当 RN切换至目标基站时, 在目标基站和 RN间不 需要针对 UDP重建连接。
对 SCTP而言,这是基于连接的传输层协议,也就是说,在 RN与源基站、 或 RN与目标基站间,基于 SCTP上控制信令的传送需要通过预定的通讯通道 或路径进行。这就意味着当 RN切换到目标基站时, 需要重建 RN与目标基站 间的通讯通道或路径。 在本实施例中, 上述通讯通道可以为 SCTP偶联。 本 领域的技术人员可以理解, SCTP偶联指的是在两个 SCTP端点间通过 SCTP 协议制定的四步握手机制建立起来的进行数据传递的逻辑联系或路径, 在 此不再赘述。
本发明第一实施例提供的一种 RN切换方法, 如图 3所示, 包括: S301 : 目标基站接收服务于 RN的源基站发送的切换请求;
S302: 所述目标基站从所述源基站获取传输网络层 TNL信息;
S303: 所述目标基站根据所述 TNL信息与所述 RN建立连接。
在 S301中, 可选的, 当 RN在移动中向源基站提供切换请求时, 源基 站会根据 RN上报的测量报告确认目标基站, 并向目标基站发送切换请求, 用于切换 RN。 可选的, 源基站也可以根据小区负载情况, 主动确认目标基 站, 并向目标基站发送切换请求, 用于切换 RN。
在 S302中, TNL信息可以为 SCTP偶联信息和 /或用户面传输地址信息。 所述 SCTP偶联信息, 包括下列信息中的一种或一种以上:
所述 RN的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述 RN及所述源基站的主路径地址。
其中,所述 RN的控制面的传输地址列表中具有 RN的至少一个控制面 传输地址信息。 例如, 上述传输地址信息可以为 RN的控制面的 IP地址, 也可以为 RN的 SCTP端口地址, 或者二者的组合。本领域的技术人员可以 理解, 上述控制面传输地址可以为基于控制面的发送数据包的路由, 也可 以为其他用于传输 RN控制面信令的地址, 在此不再赘述。
所述源基站的控制面的传输地址列表中包含源基站的至少一个控制面 传输地址信息。例如,上述传输地址信息可以为源基站的控制面的 IP地址, 也可以为源基站的 SCTP端口地址, 或者二者的组合。 同样, 本领域的技术 人员也可以理解, 上述控制面传输地址可以为基于控制面的发送数据包的 路由, 也可以为其他用于传输 RN控制面信令的地址, 在此不再赘述。
所述主路径地址(英文为: primary path IP address )为源基站与 RN间 传送控制面信令的路径地址,包括由 RN的控制面的传输地址列表中选择出 的一个控制面传输地址, 和 /或由源基站的控制面的传输地址列表中选择出 的一个控制面传输地址。 基于上述路径地址, 源基站与 RN间可以在 SCTP 偶联上传送控制面信令。
在本实施例中 , 例如, 目标基站可以从 RN的控制面的传输地址列表、 源基站的控制面的传输地址列表中分别获取 RN、源基站的控制面的传输地 址, 并基于上述传输地址进行目标基站与 RN的连接。 又如, 目标基站也可 以直接使用获取的 RN和源基站的主路径地址,并基于主路径地址进行目标 基站与 RN的连接。 此时, 目标基站获取的 RN的控制面的传输地址列表和 /或源基站的控制面的传输地址列表中的其他控制面的传输地址可以作为目 标基站与 RN间的备用路径地址 (英文为: secondary path IP address), 用于 当在主路径上无法传送控制面信令时,将基站与 RN间传送 SCTP控制面信 令的主路径切换至备用路径。
在本实施例中, 所述用户面传输地址信息, 为源基站与 RN的用户面传 输地址信息。 例如, 上述用户面的传输地址信息可以为源基站及 RN的用户 面的 IP地址, 也可以为源基站及 RN的用户面的端口地址, 或者二者的组合。 本领域的技术人员可以理解, 上述用户面的传输地址可以为基于控制面的 发送数据包的路由, 还可以为其他用于在源基站及 RN间传送用户面数据的 地址, 在此不再赘述。 并且, 本领域的技术人员也可以理解, RN的控制面 传输地址和用户面传输地址可以相同或不同; 同样, 源基站的控制面传输 地址和用户面传输地址也可以相同或不同, 本发明对此不作限定。
在本实施例中, 可选的, 源基站可以将上述 TNL信息携带在切换请求 中向目标基站发送。 可选的, 源基站也可以将上述 TNL信息携带在其他消 息或信元中向目标基站发送, 例如, 源基站可以将上述 TNL信息携带在序 列号状态传输消息向目标基站发送。 或者, 源基站也可以向目标基站发送 单独的消息或信元, 所述消息或信元中携带上述 TNL信息, 本发明对此不 作限定。
在 S303中, 当 RN接入到目标基站下的小区后, 目标基站或 RN根据 TNL信息, 建立目标基站与 RN间的 TNL连接, 包括建立目标基站与 RN 间的 SCTP偶联和 /或用户面的连接。 所述 RN接入目标基站下的小区, 是 指 RN随机接入目标基站下的小区, 且在所述小区中 RN可以接收到目标 基站的调度信息。
可选的, 当上述 TNL信息为 SCTP偶联信息且当 RN接入到目标基站 下的小区时, 目标基站或 RN可以立刻发起目标基站与 RN间的连接。具体 而言, 上述目标基站或 RN可以根据 TNL信息, 如根据 RN及源基站的主 路径地址将源基站和 RN间的主路径转移至目标基站及 RN间,用于所述目 标基站通过所述第一主路径连接所述 RN。 在本实施例中,在建立目标基站与 RN的 SCTP偶联前, 目标基站可以 进行目标基站侧的配置。 本领域的技术人员可以理解, 上述目标基站侧的 配置可以为根据 SCTP偶联信息在目标基站侧根据 SCTP偶联信息进行协议 栈 SCTP上的数据结构的配置, 在此不再赘述。
在本实施例中,目标基站在目标基站侧进行配置所用到的 SCTP偶联信 息, 还可以包括但不限于如下参数:
差错计数(Error Count ) ,用于指示当前到达目标基站的传输差错计数; 差错门限( Error Threshold ) , 用于指示当前对应目标基站的差错门限, 例如, 当差错计数超过上述差错门限时,认为上述 SCTP偶联的控制面传输 地址无法传送至目标基站。
本领域的技术人员可以理解,目标基站进行配置所用到的 SCTP偶联信 息的参数不限于此, 只要是能使目标基站正确获取源基站与 RN间的 SCTP 连接状态,并根据上述 SCTP连接状态实现 RN从源基站间同步到目标基站 的参数即可, 在此不再赘述。
可选的, 当 TNL信息为用户面传输地址信息、 RN接入到目标基站下 的小区后且当 RN或目标基站向对端传送数据时,触发目标基站或 RN发起 目标基站与 RN间的连接。
本实施例针对 RN移动的场景, 通过源基站向目标基站传送的 TNL信 息, 进行目标基站侧的配置, 实现了 RN从源基站至目标基站的切换, 从而 保证 RN与目标基站的连接建立。
本发明第二实施例的 RN切换方法如图 4所示, 包括:
S401 : 目标基站接收服务于 RN的源基站发送的切换请求。
上述 S401可以参考第一实施例中的相关描述, 在此不再赘述。
S402: 目标基站从所述源基站获取 SCTP偶联信息。
在本实施例中, 所述 SCTP偶联信息可参考第一实施例中的相关描述, 在此不再赘述。 在本实施例中, RN、 目标基站、 及源基站的 SCTP偶联信息、 及用户 面传输地址信息可以通过预配置的方式保持不变。 例如, 通过运营商自行 定义 RN、 目标基站、及源基站的 SCTP偶联信息、及用户面传输地址信息, 使上述 SCTP偶联保持不变。
在本实施例中, 因为源基站及 RN间具有 X2/S1接口, 并且上述 X2/S1 接口对应两个独立的 SCTP偶联,所以在源基站向目标基站传送的 SCTP偶 联信息中, 包括对应上述 X2/S1接口的两个单独的 SCTP偶联。
S403: 所述目标基站根据所述 SCTP偶联信息进行所述目标基站侧的 配置。
在本实施例中 ,通过预配置的方式或运营商自行定义的方式,确定 RN、 目标基站、源基站的 SCTP偶联信息及用户面传输地址均保持不变, 源基站 无需将用户面传输地址发送给目标基站,只需要将源基站侧的 SCTP偶联信 息发送给目标基站,使得目标基站正确获取源基站与 RN间的 SCTP连接状 态, 并根据上述 SCTP连接状态实现 RN从源基站同步到目标基站。
可选的,为了保证基站与 RN间的 SCTP连接状态在切换的过程中保持 不变,在目标基站进行目标基站侧的配置时、或 RN成功切换到目标基站前, 可以停止上述主路径上的信息传输, 例如停止心跳机制相关信息的传输。
S404: 当所述 RN接入到所述目标基站下的小区后, 目标基站基于所 述 SCTP偶联信息将所述源基站及所述 RN间的主路径转移至所述目标基站 与所述 RN间, 以实现所述 RN及所述目标基站的连接建立。
在本实施例中, 目标基站根据 SCTP偶联信息中的主路径地址,通过触 发机制来实现目标基站与 RN间的连接,以恢复 SCTP偶联及在 SCTP偶联 上承载的控制面信令的传输。
本实施例中,上述触发机制可以为通过需要承载在 SCTP偶联上的控制 面信令的传输,来隐含的指示对端上述 SCTP偶联已恢复连通性。本领域的 技术人员可以理解,传输控制面信令的发起方可以是 RN或者目标基站,相 应的, 接收方是目标基站或者 RN, 本发明对此不做限定。 例如, 当目标基 站在基于所述主路径地址的主路径上向 RN发送 SCTP偶联上的控制面信 令, RN能够接收到上述控制面信令时, 表示目标基站与 RN间的 SCTP偶 联已经建立连接。 又如, 当目标基站在所述主路径上向 RN发送 SCTP偶联 上的控制面信令, RN不能接收到上述控制面信令时, 表示目标基站与 RN 间的 SCTP偶联还没有建立。
本实施例针对 RN移动的场景, 当 RN从源 RN切换至目标基站时, 只 需要把源基站与 RN的 SCTP偶联状态信息在切换准备的过程中提前传递给 目标基站, 就可以让 Un接口上的 SCTP偶联状态不受影响。
本发明第三实施例的 RN切换方法, 如图 5所示, 包括:
S501 : 服务于 RN的源基站向目标基站发送切换请求。
上述 S501可以参考第一实施例中的相关描述, 在此不再赘述。
S502: 所述源基站向目标基站发送第一传输网络层 TNL信息。
在本实施例中,所述第一 TNL信息包括第一 SCTP偶联信息和 /或第一 用户面传输地址信息。 所述第一 SCTP偶联信息和 /或第一用户面传输地址 信息可参考第一实施例中针对 SCTP偶联信息和 /或用户面传输地址信息的 相关描述, 在此不再赘述。
在本实施例中, 根据 RN向源基站上报的测量报告, 所述源基站可以决 定是否将 RN切换至目标基站, 并向所述目标基站发送所述第一 TNL信息。 本领域的技术人员可以理解, 源基站也可以自行决定是否将 RN切换至目标 基站, 并向所述目标基站发送所述第一 TNL信息, 本发明对此不做限定。
S503: 所述目标基站根据所述第一传输网络层 TNL信息向所述源基站 发送第二传输网络层 TNL信息。
在本实施例中, 当 RN、 目标基站、 源基站中任何一个的 SCTP偶联、 或 RN、 目标基站、 源基站中任何一个的用户面传输地址发生变化时, 也就是 说, 当所述 RN的控制面的传输地址列表、 所述源基站的控制面的传输地址 列表、 所述目标基站的控制面的传输地址列表、 所述 RN与所述源基站的主 路径地址中的至少一个发生变化; 或者, 所述源基站和所述 RN的用户面传 输地址中的至少一个发生变化时, 目标基站根据第一 TNL信息向源基站发 送第二 TNL信息。
在本实施例中,所述第二 TNL信息包括第二 SCTP偶联信息和 /或第二 用户面传输地址信息。所述第二 SCTP偶联信息由所述目标基站配置, 包括 下列信息的一种或一种以上:
所述 RN的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述目标基站的控制面的传输地址列表;
所述 RN及所述源基站的第二主路径地址。
在本实施例中, 当所述 RN的控制面的传输地址、所述源基站的控制面 的传输地址不可用时, 目标基站可以配置所述第二 SCTP偶联信息,并将更 新后第二 SCTP偶联信息发送给源基站。例如, 当源基站将源基站/ RN当前 的 SCTP偶联信息传输给目标基站时, 目标基站根据目标基站侧的本地配 置, 发现 RN/源基站的任意一个控制面传输地址与目标侧使用的传输地址 发生冲突时, 或者发现 RN/源基站的任意一个控制面传输地址无法在目标 侧配置的本地传输网络中使用时 (譬如 RN/源基站的任意一个控制面传输 地址与目标侧使用的传输地址不是同一个 IP子网内的地址 ),目标基站将更 新后的第二 SCTP偶联信息发送给源基站。本领域的技术人员可以理解,上 述目标基站配置第二 SCTP偶联信息可以为目标基站根据实际情况重新配 置第二 SCTP偶联信息, 也可以为目标基站选取既有的参数更新第二 SCTP 信息, 本发明对此不做限定。
在本实施例中, 目标基站向源基站传送的第二用户面传输地址信息, 为经由目标基站配置的且经由源基站确认的所述源基站及 RN间的用户面传 输地址。 例如, 当源基站将源基站及 RN间当前的用户面传输地址传输给目 标基站时, 目标基站根据目标基站侧的本地配置, 发现源基站 /RN的用户面 传输地址不可用时(如 RN/源基站的任意一个用户面传输地址与目标侧使用 的传输地址发生冲突,或者 RN/源基站的任意一个用户面传输地址无法在目 标侧配置的本地传输网络中使用时 ), 目标基站将更新后的源基站和 /或 RN 的用户面传输地址发送给源基站。
在本实施例中, 根据所述第一 TNL信息, 所述目标基站可以向所述源 基站发送指示有所述第二 TNL信息的切换请求确认消息。 如上所述, 如果 目标基站确认不能沿用第一 TNL信息且需要向源基站发送更新的 TNL信息 时,则可以通过切换请求确认消息来对源基站进行相应指示,并把第二 TNL 信息传递给源基站。
在本实施例中, 目标基站将 SCTP偶联信息和 /或用户面传输地址信息传 送至源基站后, 因为 RN无法直接接收到目标基站发送的数据, 故, RN接收 到上述数据是通过源基站的转发。 例如, 源基站接收所述目标基站发送的 所述第二 TNL信息后, 所述源基站向所述 RN发送指示有所述第二 TNL信息 的 S1消息或 RRC消息。 例如, 所述 S1消息可以为承载 S1接口控制面信令的 消息, 如承载 S1AP信令的消息, 所述 RRC消息可以为 RRC连接重配置消息 或 RRC下行传输消息。 在上述 S1消息或 RRC连接重配置消息中可以增加一 个用于指示第二 TNL信息的透明容器或信元, 用于携带更新后的 SCTP偶联 信息和 /或用户面传输地址。
S504: 所述源基站根据所述第二传输网络层 TNL信息向所述目标基站 发送第三传输网络层 TNL信息。
在本实施例中, 源基站根据更新的控制面传输地址和 /或第二主路径地 址,在 RN和源基站间添加第二主路径,用于 RN切换至目标基站时的 SCTP 偶联。此时,在源基站与 RN间传输控制面信令的 SCTP偶联仍旧为第一主 路径, 也就是说, 传输控制面信令仍在第一主路径上进行传输。
在本实施例中,第三 TNL信息为第三 SCTP偶联信息和 /或第二用户面 传输地址信息。所述第三 SCTP偶联信息经由所述源基站确认, 包括下列信 息的一种或一种以上:
RN的控制面的传输地址列表;
源基站的的控制面的传输地址列表;
RN及所述源基站的第二主路径地址。
在本实施例中,本领域的技术人员可以理解,第三 SCTP偶联信息中的 RN的控制面的传输地址列表与第二 SCTP偶联信息中的 RN的控制面的传 输地址列表可以相同, 也可以不同。 同样, 第三 SCTP偶联信息中的源基站 的控制面的传输地址列表与第二 SCTP偶联信息中的源基站的控制面的传 输地址列表可以相同, 也可以不同, 本发明对此不做限定。
在本实施例中, 所述目标基站接收所述源基站根据第二 TNL信息发送 的包括所述第三 TNL信息的序列号状态传输消息。 例如, 上述序列号状态 传输消息可以为同步状态传输消息。 如上所述, 当 RN和源基站更新好了 SCTP偶联和 /或用户面传输地址后,还需要把更新后的 SCTP偶联状态信息 和 /或用户面传输地址信息告诉给目标基站, 因此可以使用上述同步状态传 输消息来传递第三 TNL信息。 例如, 在同步状态传输消息中可以增加一个 用于指示第三 TNL 连接状态的透明容器或信令, 用于携带所述更新后的 SCTP偶联信息和 /或用户面传输地址信息。
S505: 所述目标基站根据所述第三传输网络层 TNL信息与所述目标基 站建立连接。
可选的, 所述目标基站基于所述第二用户面传输地址信息与所述 RN 建立连接。
可选的, 当所述 RN接入到所述目标基站下的小区后,所述目标基站基 于所述第三 SCTP偶联信息将所述源基站及所述 RN间的第二主路径转移至 所述目标基站与所述 RN间,用于所述目标基站通过所述第二主路径连接所 述 RN。 可选的,所述目标基站根据所述第三 SCTP偶联信息,将控制面信令的 传输从第一主路径切换至第二主路径, 且通过所述第二主路径进行所述目 标基站与所述 RN的连接。
在本实施例中, 针对第一主路径和第二主路径上控制面信令的切换可 以包含如下两种方式:
1、 在将源基站和 RN间的第二主路径转移至目标基站和 RN间之前, 所述源基站可以将基于所述第一主路径地址的第一主路径上传送的通讯信 息 (在本实施例中, 上述通讯信息可以为控制面信令)切换至基于所述第 二主路径地址的第二主路径上传送。 随后, 所述源基站删除所述第一主路 径。
2、 目标基站首先将 RN和源基站间第一主路径及第二主路径全部转移 至 RN和目标基站间。 随后, 目标基站将基于所述第一主路径地址的第一主 路径上传送的通讯信息切换至基于所述第二主路径地址的第二主路径上传 送, 并且删除所述第一主路径。
可选的,为了保证基站与 RN间的 SCTP连接状态在切换的过程中保持 不变, 在目标基站进行目标基站侧的配置时, 如协议栈的配置、或 RN成功 切换到目标基站前, 停止上述第一主路径或第二主路径上的信息传输, 例 如停止心跳机制相关信息的传输。
故, 本实施例针对 RN移动的场景, 在源基站 /目标基站/ RN中任意一 个的 SCTP偶联、 或源基站 /RN中任意一个的用户面传输地址需要更新的 情况下, 目标基站向源基站发送自行配置的第二 TNL信息后, 源基站向目 标基站发送经由源基站确认的第三 TNL信息, 以实现了 RN从源基站至目 标基站的切换, 从而保证 RN与目标基站的连接建立。
本领域技术人员可以理解实现方法实施例的全部或部分可以通过程序 指令相关的硬件来完成, 前述的程序可以存储于一计算机可读取存储介质 中, 上述述程序在执行时, 执行包括上述方法实施例的流程; 而前述的存 储介质包括: ROM、 RAM, 磁碟或者光 盘等各种可以存储程序代码的介 本发明第四实施例提供一种基站, 其主要结构可参照图 6所示, 包括: 接收机 61 , 用于接收服务于 RN的源基站发送的切换请求及第一传输网 络层 TNL信息; 及
处理器 62, 用于根据所述第一 TNL信息与所述 RN建立连接。
其中, 如果所述源基站的控制面传输地址、 及所述中继节点的控制面 传输地址中的至少一个控制面传输地址不可用, 和 /或所述源基站的用户面 传输地址、 及所述中继节点的用户面传输地址中的至少一个用户面传输地 址不可用,所述处理器还 82用于配置第二 TNL信息,所述第二 TNL信息包括 第二 SCTP偶联信息和 /或第二用户面传输地址信息。
其中, 所述基站还包括发射机 63 , 用于根据所述第一 TNL信息, 向所 述源基站发送第二 TNL信息。
其中, 上述接收机 61 , 还用于接收所述源基站根据所述第二 TNL信息 发送的第三 TNL信息, 所述第三 TNL信息由所述源基站所确认。
所述基站可以实现上述第一至第三实施例的 RN切换方法中所述目标 基站执行的动作, 例如, 所述接收机 61可以执行第一实施例中 S101的动 作。 故, 本实施例针对 RN移动的场景, 实现了 RN从源基站至目标基站的 切换, 从而保证 RN与目标基站的连接建立。
本发明第五实施例提供一种基站, 其主要结构可参照图 7所示, 包括: 处理器 71, 用于决定将所述基站服务的 RN切换至目标基站;
发射机 72, 用于向所述目标基站发送切换请求及第一 TNL信息, 以便 于所述目标基站根据所述第一 TNL信息与所述 RN建立连接。
其中, 所述第一 TNL信息, 包括: 第一流控制传输协议 SCTP偶联信息 和 /或第一用户面传输地址信息。
所述第一 SCTP偶联信息, 包括下列信息中的至少一种: 所述 RN的控制面的传输地址列表;
所述基站的的控制面的传输地址列表;
所述 RN及所述基站的第一主路径地址。
其中, 上述基站还包括接收机 73 , 用于当所述目标基站确认所述基站 的控制面传输地址、 及所述 RN的控制面传输地址中的至少一个控制面传输 地址不可用, 和 /或所述基站的用户面传输地址、 及所述 RN的用户面传输地 址中的至少一个用户面传输地址不可用时, 接收所述目标基站根据所述第 一 TNL信息向所述基站发送的第二 TNL信息,所述第二 TNL信息包括由所述 目标基站配置的第二 SCTP偶联信息和 /或第二用户面传输地址信息。
其中, 所述发射机 72还用于根据所述第二 TNL信息向所述目标基站发 送第三 TNL信息, 所述第三 TNL信息包括由所述基站确认的第三 SCTP偶联 信息和 /或所述第二用户面传输地址信息。
其中, 所述由目标基站配置的第二 SCTP偶联信息, 包括下列信息中的 至少一种:
所述 RN的控制面的传输地址列表;
所述基站的的控制面的传输地址列表;
所述目标基站的控制面的传输地址列表;
所述 RN及所述基站的第二主路径地址; 及
所述由基站确认的第三 SCTP偶联信息, 包括下列信息中的至少一种: 所述 RN的控制面的传输地址列表;
所述基站的的控制面的传输地址列表;
所述 RN及所述基站的第二主路径地址。
其中,上述处理器 71还用于确认所述第三 SCTP偶联信息和 /或所述第二 用户面传输地址信息。
其中, 上述发射机 72, 还用于向所述 RN发送 S1消息或无线资源控 制 RRC消息, 所述 S1消息或所述 RRC消息分别包括所述第二 TNL信息。 所述基站可以实现上述第一至第三实施例的 RN切换方法中所述源基 站执行的动作, 例如, 所述发射机 72可以执行第三实施例中 S501的动作。 故,本实施例针对 RN移动的场景,实现了 RN从源基站至目标基站的切换, 从而保证 RN与目标基站的连接建立。
本发明第六实施例提供一种通讯系统, 包括中继节点, 移动性管理实 体, 目标基站; 及源基站。 所述目标基站可以为第四实施例中的基站, 以 实现上述第一至第三实施例的 RN切换方法中所述目标基站执行的动作。
所述源基站可以为第五实施例中的基站, 以实现上述第一至第三实施 例的 RN切换方法中所述源基站执行的动作。
故, 本实施例针对 RN移动的场景, 实现了 RN从源基站至目标基站的 切换, 从而保证 RN与目标基站的连接建立。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描 述进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实施例 的一个或多个装置中。 并且, 实施例的模块可以合并为一个模块, 也可以 进一步拆分成多个子模块。
本领域技术人员可以理解, 本发明实施例中装置模块的划分为功能划 分, 实际具体结构可以为上述功能模块的拆分或合并。
以上实施例的序号仅仅为了描述, 不代表实施例的优劣。
权利要求的内容记载的方案也是本发明实施例的保护范围。
以上实施例仅用以说明本发明的技术方案, 而非对其限制; 尽管参照 前述实施例对本发明进行了详细的说明, 本领域的普通技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分 技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的本 质脱离本发明各实施例技术方案的范围。

Claims

权利要求
、 一种中继节点切换方法, 其特征在于, 包括:
目标基站接收服务于中继节点的源基站发送的切换请求; 所述目标基站从所述源基站获取第一传输网络层 TNL信息; 及 所述目标基站根据所述第一 TNL信息与所述中继节点建立连接。 、 如权利要求 1所述的方法, 其特征在于, 所述第一 TNL信息, 包 括:
第一流控制传输协议 SCTP偶联信息和 /或第一用户面传输地址信 息。
、 如权利要求 2所述的方法,其特征在于: 所述第一 SCTP偶联信息, 包括下列信息中的至少一种:
所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述中继节点及所述源基站的第一主路径地址。
、 如权利要求 2或 3所述的方法, 其特征在于, 所述目标基站根据所 述第一 TNL信息与所述中继节点建立连接, 包括:
所述目标基站基于所述第一 SCTP偶联信息将所述源基站和所述 中继节点间的第一主路径转移至所述目标基站与所述中继节点 间, 用于所述目标基站通过所述第一主路径连接所述中继节点。 、 如权利要求 1-3任一项所述的方法, 其特征在于, 还包括:
根据所述第一 TNL信息, 所述目标基站向所述源基站发送第二 TNL信息, 所述第二 TNL信息包括第二 SCTP偶联信息和 /或第二 用户面传输地址信息。
、 如权利要求 5所述的方法, 其特征在于, 所述根据所述第一 TNL 连接状态信息, 所述目标基站向所述源基站发送第二 TNL信息, 包括:
如果所述目标基站根据所述第一 TNL信息确认源基站的控制面 传输地址、及中继节点的控制面传输地址中的至少一个控制面传 输地址不可用,和 /或如果所述目标基站根据所述第一 TNL信息确 认源基站的用户面传输地址、及中继节点的用户面传输地址中的 至少一个用户面传输地址不可用, 所述目标基站向所述源基站发 送所述第二 TNL信息。
、 如权利要求 6所述的方法, 其特征在于, 所述根据所述第一 TNL 连接状态信息, 所述目标基站向所述源基站发送第二 TNL信息, 包括:
如果所述目标基站确认所述源基站的控制面传输地址、及所述中 继节点的控制面传输地址中的至少一个控制面传输地址不可用 时, 所述目标基站根据所述第一 SCTP偶联信息配置所述第二 SCTP偶联信息, 并向源基站发送所述第二 SCTP偶联信息。
、 如权利要求 5-7任一项所述的方法, 所述第二 SCTP偶联信息包括 下列信息中的至少一种:
所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述目标基站的控制面的传输地址列表;
所述中继节点及所述源基站的第二主路径地址。
、 如权利要求 5-8任一项所述的方法, 其特征在于, 还包括:
所述目标基站接收所述源基站根据所述第二 TNL信息发送的第 三 TNL信息, 所述第三 TNL信息包括第三 SCTP偶联信息和 /或所 述第二用户面传输地址信息。
、 如权利要求 9所述的方法, 其特征在于:
所述第三 SCTP偶联信息由所述源基站确认, 包括下列信息中的 至少一种:
所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述中继节点及所述源基站的第二主路径地址。 11、 如权利要求 9或 10所述的方法, 其特征在于, 所述目标基站根据 所述第一 TNL信息与所述中继节点建立连接, 包括:
所述目标基站基于所述第三 SCTP偶联信息将所述源基站及所述 中继节点间的第二主路径转移至所述目标基站与所述中继节点 间, 用于所述目标基站通过所述第二主路径连接所述中继节点。
12、 如权利要求 5-10任一项所述的方法, 其特征在于, 所述目标基站 根据所述第一 TNL信息与所述中继节点建立连接, 包括: 所述目标基站基于所述第二用户面传输地址信息连接所述目标 基站与所述中继节点。
13、 如权利要求 5-12任一项所述的方法, 其特征在于:
所述第一用户面传输地址信息为所述源基站向所述目标基站发 送的所述源基站和 /或所述中继节点的用户面传输地址信息; 及 所述第二用户面传输地址信息为所述目标基站配置的且经由所 述源基站确认的所述源基站和 /或所述中继节点的用户面传输地 址信息。
14、 如权利要求 1-13任一项所述的方法, 其特征在于, 所述目标基站 从所述源基站获取第一传输网络层 TNL信息, 包括:
所述目标基站接收所述源基站发送的切换请求消息, 所述切换请 求消息包括所述第一 TNL信息。
15、 如权利要求 5-14任一项所述的方法, 其特征在于, 所述根据所述 第一 TNL信息, 所述目标基站向所述源基站发送第二 TNL信息, 包括:
根据所述第一 TNL信息, 所述目标基站向所述源基站发送切换请 求确认消息, 所述切换请求确认消息包括所述第二 TNL信息。
16、 如权利要求 9-15任一项所述的方法, 其特征在于, 所述目标基站 接收所述源基站根据第二 TNL信息发送的第三 TNL信息, 包括: 所述目标基站接收所述源基站根据第二 TNL信息发送的序列号 状态传输消息, 所述序列号状态传输消息包括所述第三 TNL信 、 一种基站, 其特征在于, 包括:
处理器, 用于决定将所述基站服务的中继节点切换至目标基站; 发射机, 用于向所述目标基站发送切换请求及第一传输网络层 TNL信息, 以便于所述目标基站根据所述第一 TNL信息与所述中 继节点建立连接。
、 如权利要求 17所述的基站, 其特征在于, 所述第一 TNL信息, 包 括:
第一流控制传输协议 SCTP偶联信息和 /或第一用户面传输地址信 息。
、 如权利要求 18所述的基站, 其特征在于:
所述第一 SCTP偶联信息, 包括下列信息中的至少一种: 所述中继节点的控制面的传输地址列表;
所述基站的控制面的传输地址列表;
所述中继节点及所述基站的第一主路径地址。
、 如权利要求 17-19任一项所述的基站, 其特征在于, 还包括: 接收机, 用于当所述目标基站确认所述基站的控制面传输地址、 及所述中继节点的控制面传输地址中的至少一个控制面传输地 址不可用,和 /或所述基站的用户面传输地址、及所述中继节点的 用户面传输地址中的至少一个用户面传输地址不可用时,接收所 述目标基站根据所述第一 TNL信息向所述基站发送的第二 TNL 信息, 所述第二 TNL信息包括由所述目标基站配置的第二 SCTP 偶联信息和 /或第二用户面传输地址信息; 及
所述发射机, 还用于根据所述第二 TNL信息向所述目标基站发送 第三 TNL信息, 所述第三 TNL信息包括由所述基站确认的第三 SCTP偶联信息和 /或所述第二用户面传输地址信息。
、 如权利要求 20所述的基站, 其特征在于:
所述由目标基站配置的第二 SCTP偶联信息, 包括下列信息中的 至少一种:
所述中继节点的控制面的传输地址列表;
所述基站的的控制面的传输地址列表;
所述目标基站的控制面的传输地址列表;
所述中继节点及所述基站的第二主路径地址; 及
所述由基站确认的第三 SCTP偶联信息, 包括下列信息中的至少 一种:
所述中继节点的控制面的传输地址列表;
所述基站的的控制面的传输地址列表;
所述中继节点及所述基站的第二主路径地址。
22、 如权利要求 20或 21所述的基站, 其特征在于, 所述处理器还用于 确认所述第三 SCTP偶联信息和 /或所述第二用户面传输地址信 息。
23、 一种基站, 其特征在于, 包括:
接收机, 用于接收服务于中继节点的源基站发送的切换请求及第 一传输网络层 TNL信息; 及
处理器, 用于根据所述第一 TNL信息与所述中继节点建立连接。
24、 如权利要求 23所述的基站, 其特征在于, 所述第一 TNL信息, 包 括:
第一流控制传输协议 SCTP偶联信息和 /或第一用户面传输地址信 息, 所述第一 SCTP偶联信息包括下列信息中的至少一种: 所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述中继节点及所述源基站的第一主路径地址。
25、 如权利要求 23或 24所述的基站, 其特征在于:
如果所述源基站的控制面传输地址、及所述中继节点的控制面传 输地址中的至少一个控制面传输地址不可用,和 /或所述源基站的 用户面传输地址、及所述中继节点的用户面传输地址中的至少一 个用户面传输地址不可用, 所述处理器还用于配置第二 TNL信 息, 所述第二 TNL信息包括第二 SCTP偶联信息和 /或第二用户面 传输地址信息; 及
所述基站还包括发射机, 用于向所述源基站发送所述第二 TNL信 息。
26、 如权利要求 25所述的基站, 其特征在于:
所述接收机, 还用于接收所述源基站根据所述第二 TNL信息发送 的第三 TNL信息, 所述第三 TNL信息包括由所述源基站确认的第 三 SCTP偶联信息和 /或所述第二用户面传输地址信息。
27、 如权利要求 26所述的基站, 其特征在于:
所述第二 SCTP偶联信息, 包括下列信息中的至少一种: 所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述基站的控制面的传输地址列表;
所述中继节点及所述源基站的第二主路径地址; 及
所述第三 SCTP偶联信息, 包括下列信息中的至少一种: 所述中继节点的控制面的传输地址列表;
所述源基站的的控制面的传输地址列表;
所述中继节点及所述源基站的第二主路径地址。
28、 一种通讯系统, 其特征在于, 包括:
如权利要求 17-22任一项所述的基站; 及
如权利要求 23-27任一项所述的基站。
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