WO2011079818A1 - 一种通信系统切换准备方法、中继节点、通信系统 - Google Patents

一种通信系统切换准备方法、中继节点、通信系统 Download PDF

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Publication number
WO2011079818A1
WO2011079818A1 PCT/CN2010/080597 CN2010080597W WO2011079818A1 WO 2011079818 A1 WO2011079818 A1 WO 2011079818A1 CN 2010080597 W CN2010080597 W CN 2010080597W WO 2011079818 A1 WO2011079818 A1 WO 2011079818A1
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Prior art keywords
cell
handover request
node
handover
identifier
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PCT/CN2010/080597
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English (en)
French (fr)
Inventor
马慧
陈卓
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华为技术有限公司
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Publication of WO2011079818A1 publication Critical patent/WO2011079818A1/zh

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    • 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
    • H04W36/0061Transmission or use of information for re-establishing the radio link of neighbour cell information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • 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 invention relates to a communication system switching preparation method, a relay node, and a communication system.
  • the application is submitted to the Chinese Patent Office on December 31, 2009, and the application number is 200910238888.1.
  • the invention name is "a communication system switching preparation method, a relay node,
  • the priority of the Chinese Patent Application for the communication system is hereby incorporated by reference in its entirety.
  • TECHNICAL FIELD The present invention relates to the field of mobile communication technologies, and in particular, to a communication system handover preparation method, a relay node, and a communication system.
  • a relay relay technology is proposed as a key technology for improving cell capacity and extended coverage, and deploying a relay node (RN) in a network can enhance the relationship between a base station and a terminal.
  • the RN also has the advantages of hardware cost, relatively low deployment cost, and flexible deployment.
  • the single-hop air interface link between the UE and the base station is divided into two segments, including an access link and a backhaul link, where the access link is a chain between the UE and the base station or between the UE and the RN.
  • the backhaul link is the link between the RN and the base station, and may also be referred to as a relay link.
  • the air interface transmission time of a backhaul link is increased, resulting in the same message being sent multiple times between the two nodes, which increases the signaling overhead and causes the handover preparation time to be too long and causes the handover to fail.
  • Embodiments of the present invention provide a communication system handover preparation method, a relay node, and a communication system to reduce signaling overhead in a handover process.
  • an embodiment of the present invention provides a communication system handover preparation method, including: Receiving, by the communication node, a handover request message, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells;
  • the communication node sends a handover request acknowledgement message, where the handover request acknowledgement message carries an identifier of the cell that accepts the handover request.
  • an embodiment of the present invention provides a communications node, including:
  • a transceiver module configured to receive a handover request message, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells;
  • An acknowledgment module configured to confirm that one of the cells in the set of cells under the node accepts the handover request
  • the transceiver module is further configured to send a handover request acknowledgement message according to the acknowledgement result of the confirmation module, where the handover request acknowledgement message carries the identifier of the cell that accepts the handover request.
  • an embodiment of the present invention provides a communication system, including:
  • a relay node configured to receive, in a handover preparation process, a handover request message sent by a base station, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells; And transmitting, by the cell in the cell set, the handover request acknowledgement message, where the handover request acknowledgement message carries the identifier of the cell that accepts the handover request.
  • the handover request message carries the cell identifier in the cell set under the node, and if one cell in the cell set under the communication node accepts the handover request, the communication node sends a handover request acknowledgement message, where The handover request acknowledgement message carries the identifier of the cell that accepts the handover request, thereby avoiding that, after a cell of the communication node rejects the handover request, the direct neighboring node of the lower node of the communication node needs to send to the communication node or the The communication node directly transmits the handover request message directly to the neighboring node, thereby reducing the signaling overhead in the handover process and reducing the handover control plane delay.
  • FIG. 1 is a schematic flowchart of a communication system handover preparation method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a communication system handover preparation method according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic flowchart of a communication system handover preparation method according to Embodiment 4 of the present invention
  • FIG. 5 is a schematic flowchart of a communication system handover preparation method according to Embodiment 5 of the present invention
  • FIG. 8 is a schematic flowchart of a communication system handover preparation method according to Embodiment 8 of the present invention
  • FIG. 8 is a schematic flowchart of a communication system handover preparation method according to Embodiment 8 of the present invention
  • FIG. 10 is a schematic structural diagram of a relay node switching method according to an embodiment of the present invention
  • FIG. 10 is a schematic structural diagram of a relay node according to an embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 12 is another schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a base station in a communication system according to an embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of a method for preparing a communication system according to Embodiment 1 of the present invention, including:
  • the communication node receives a handover request message, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells.
  • the communication node sends a handover request acknowledgement message, where the handover request acknowledgement message carries an identifier of the cell that accepts the handover request.
  • the handover request message carries the cell identifier in the cell set under the node, and if one cell in the cell set under the communication node accepts the handover request, the communication node sends a handover request acknowledgement message, where The handover request acknowledgement message carries the identifier of the cell that accepts the handover request, thereby avoiding that, after a cell of the communication node rejects the handover request, the direct neighboring node of the lower node of the communication node needs to send to the communication node or the The communication node directly transmits the handover request message directly to the neighboring node, thereby reducing the signaling overhead in the handover process and reducing the handover control plane delay.
  • FIG. 2 is a schematic flowchart of a handover optimization method of a communication system according to Embodiment 2 of the present invention.
  • the handover is performed by using a cell identifier and a security key parameter of a plurality of target cells carrying an RN node in a handover request message, which specifically includes:
  • the UE sends a measurement report to the eNB1, where the measurement report carries the measurement result of multiple cells.
  • the eNB1 performs a handover decision according to the measurement result of the measurement report.
  • the eNB1 selects multiple cells of the RN node as the target cell according to the measurement result;
  • the eNB 1 sends a handover request message to the eNB2, where the message carries the cell identifier and the security key parameter of the multiple target cells of the RN node.
  • the cell identifier is used to identify a cell, such as an E-UTRAN Cell Global Identity (ECGI); the security key parameter is used by the UE to use the security key of the target cell that accepts the handover request when interacting with the target cell data that accepts the handover request.
  • the parameters are protected by the access layer AS. 205.
  • the eNB2 sends a handover request message to the RN node, where the message carries the cell identifier and the security key parameter of the multiple target cells of the RN node.
  • the RN node sequentially determines whether each target cell in the multiple target cells can accept the handover request, until a target cell of the multiple target cells accepts the handover request.
  • the RN node sends a handover request acknowledgement message to the eNB2, where the message carries the configuration parameter of the target cell for accepting the handover request.
  • the configuration parameters include a target cell identifier, a target cell security algorithm identifier, and a target cell system message.
  • the eNB2 forwards the handover request acknowledgement message to the eNB1.
  • the eNB1 After receiving the handover request acknowledgement message, the eNB1 is configured to send a handover command message to the UE, where the message carries the configuration parameter of the target cell that accepts the handover request. 210.
  • the UE requests the configuration of the target cell according to the handover request.
  • the parameter accesses the target cell.
  • the embodiment of the present invention performs handover by using the cell identifier and the security key parameter of the multiple target cells that carry the RN node in the handover request message, thereby avoiding that the eNB 1 needs to be from the RN or the eNB 2 after the RN rejects the handover request by one cell of the RN.
  • the handover request message is repeatedly sent, which reduces signaling overhead during handover and reduces handover control plane delay.
  • FIG. 3 is a schematic flowchart of a handover optimization method of a communication system according to Embodiment 2 of the present invention, where handover is performed by using a cell identifier and a security key parameter of a plurality of target cells carrying an RN node and an eNB2 in a handover request message, and the steps of this embodiment are performed.
  • 301, 302, 308, 310, 311 are similar to steps 201, 202, 208, 209, 210 of the embodiment, except that:
  • the eNB1 selects the RN node and the multiple cells of the eNB2 as the target cell according to the measurement result;
  • the eNB1 sends a handover request message to the eNB2, where the message carries the cell identifier and the security key parameter of the multiple target cells of the RN node and the eNB2.
  • the cell identifier is used to identify a cell, such as an E-UTRAN Cell Global Identity (ECGI); the security key parameter is used when the UE interacts with the target cell data that accepts the handover request.
  • ECGI E-UTRAN Cell Global Identity
  • the security key parameter of the target cell subject to the handover request performs access layer AS security protection.
  • the eNB2 sends a handover request message to the RN node, where the message carries the cell identifier and the security key parameter of the multiple target cells of the RN node.
  • the eNB2 sends a handover request message to the RN node different from the handover request message received by the eNB2, and the eNB2 sends a handover request message to the RN node to regenerate a new handover request message for the eNB2, which generates a new handover request message and the received handover.
  • the request message differs in that only the cell identity and security key parameters of the plurality of target cells of the RN node are carried.
  • the RN node sequentially determines, according to the priority of the target cell, whether each target cell in the multiple target cells can accept the handover request.
  • the priority of each target cell is arranged or randomly arranged according to the quality of the cell identity signal quality of the target cell.
  • the RN sends a handover preparation failure message to the eNB2.
  • the reason that the handover condition is not satisfied may include that the cell is overloaded, the cell is a restricted cell, or the security algorithm does not match.
  • the eNB2 determines, according to the priority of the target cell of the eNB2, whether each target cell in the multiple target cells can accept the handover request, until a target cell in the multiple target cells accepts the handover. Request
  • the eNB2 sends the handover request acknowledgement message to the eNB1, where the message carries configuration parameters of the target cell of the eNB2.
  • the configuration parameters include a target cell identifier, a target cell security algorithm identifier, and a target cell system message.
  • the priority of each target cell is arranged or randomly arranged according to the quality of the cell identity signal quality of the target cell.
  • the embodiment of the present invention performs handover by using a cell identifier and a security key parameter of multiple target cells carrying the RN and the eNB2 in the handover request message, thereby avoiding a cell rejection by the RN.
  • the eNB1 also needs to repeatedly send the handover request message to the RN or the eNB2, which reduces the signaling overhead in the handover process and reduces the handover control plane delay.
  • Steps 401 and 402 in this embodiment are similar to steps 201 and 202 in the second embodiment, except that:
  • the eNB1 decides to perform the handover, the eNB1 selects one cell of the RN node as the target cell according to the measurement result, and selects multiple cells of the RN node as the candidate cell;
  • the eNB1 sends a handover request message to the eNB2, where the message carries a cell identifier and a security key parameter of a target cell of the RN node, and a cell identifier and a security key parameter of the multiple candidate cells of the RN node.
  • the eNB2 sends a handover request message to the RN node, where the message carries a cell identifier and a security key parameter of a target cell of the RN node, and a cell identifier and a security key parameter of the multiple candidate cells of the RN node.
  • the RN node determines whether the candidate cell can accept the handover request.
  • the RN node sends a handover request acknowledgement message to the eNB2, where the message carries configuration parameters of the target cell of the RN node.
  • the eNB2 forwards the handover request acknowledgement message to the eNB1, where the message carries configuration parameters of the target cell.
  • the eNB1 After receiving the handover request acknowledgement message, the eNB1 determines whether to accept the target cell selected by the eNB2.
  • the eNB1 accepts the target cell selected by the eNB2, send a handover life to the UE. a message carrying the configuration parameters of the target cell of the eNB2;
  • the UE accesses the target cell according to the configuration parameter of the target cell of the eNB2.
  • the embodiment of the present invention switches the cell identifier and the security key parameter of a target cell of the RN node carried in the request message, and the cell identifier and the security key parameter of the multiple candidate cells of the RN node, thereby avoiding the RN.
  • the eNB1 also needs to repeatedly send a handover request message to the RN or the eNB2, which reduces the signaling overhead during the handover process and reduces the handover control plane delay.
  • FIG. 5 is a schematic flowchart of a handover optimization method of a communication system according to Embodiment 5 of the present invention, in which a cell identifier and a security key parameter of a target cell carrying an RN node in a handover request message, and multiple candidates carrying an RN node and an eNB2 The cell identifier and the security key parameters of the cell are switched.
  • the steps 501 and 502 of the embodiment are similar to the steps 401 and 402 of the fourth embodiment, except that:
  • the eNB1 selects one cell of the RN node as the target cell according to the measurement result, and selects multiple cells of the RN node and the eNB2 as the candidate cell;
  • the eNB1 sends a handover request message to the eNB2, where the message carries the cell identifier and the security key parameter of the target cell of the RN node, and the cell identifier and the security key parameter of the multiple candidate cells that carry the RN node and the eNB2.
  • the eNB2 sends a handover request message to the RN node, where the message carries the cell identifier and the security key parameter of the target cell of the RN node, and the cell identifier and the security key parameter of the multiple candidate cells that carry the RN node.
  • the RN node determines whether the candidate cell can accept the handover request.
  • the RN node sends a handover preparation failure message to the eNB2.
  • the eNB2 sends a handover request acknowledgement message to the eNB1, where the message carries a configuration parameter of the target cell of the eNB2 and a handover indication, where the handover indication is an indication that the RN node rejects the handover request, and the eNB2 accepts the handover request.
  • the eNB1 After receiving the handover request acknowledgement message, the eNB1 learns that the eNB2 accepts the handover request, and the eNB1 determines whether to accept the target cell of the eNB2.
  • the eNB1 accepts the target cell of the eNB2, send a handover command to the UE, where the handover command carries configuration parameters of the target cell of the eNB2.
  • the UE accesses the target cell according to the configuration parameter of the target cell of the eNB2.
  • a cell carrying the RN node in the handover request message is used as the target cell, and multiple cells of the RN node and the eNB2 are selected as the candidate cell for handover, thereby avoiding that the eNB1 is still rejected after the cell rejects the handover request by the RN.
  • the handover request message needs to be repeatedly sent to the RN or the eNB2, which reduces the signaling overhead in the handover process and reduces the handover control plane delay.
  • the embodiment of the present invention may also perform handover by using a cell identifier and a security key parameter of a target cell that carries an RN node in the handover request message, and reject the target cell if the target cell of the RN node does not satisfy the handover condition.
  • the RN node further determines whether the candidate cell other than the target cell can accept the handover request, and the candidate cell is a cell other than the target cell and the candidate cell for the RN and the DeNB, if the RN node is prepared A cell in the selected cell accepts the handover request message, and selects the cell that accepts the handover request as the target cell, and the RN node sends a handover request acknowledgement message carrying the target cell configuration parameter to the eNB1 through the eNB2, if the eNB1 accepts the RN node to select The target cell, the eNB1 sends the security key parameter of the target cell to the eNB2, and the eNB2 forwards the security key parameter to the RN, and the eNB1 sends a handover command message to the UE, so that the UE accesses the target cell according to the configuration parameter of the RN node. .
  • the embodiment of the present invention may further perform handover by using a cell identifier and a security key parameter of a target cell that carries an RN node in the handover request message, and reject the handover request if the target cell of the RN node does not satisfy the handover condition. And determining whether the candidate cell other than the target cell of the RN node can accept the handover request, if the candidate cell of the RN node is unable to accept the The handover request further determines whether the candidate cell of the eNB2 can accept the handover request.
  • the cell that accepts the handover request of the eNB2 is selected as the target cell, and if the eNB1 accepts the handover request, The target cell of the eNB2, the eNB1 sends the security key parameter of the target cell to the eNB2, and the eNB1 sends a handover command message to the UE, so that the UE accesses the target cell according to the configuration parameter of the RN node.
  • the embodiment of the present invention may further include a relay node, and perform handover by using a cell identifier and a security key parameter of multiple target cells carrying the eNB2 in the handover request message, and the eNB2 sequentially determines each of the multiple target cells. Whether the target cell can accept the handover request until a certain target cell of the plurality of target cells accepts the handover request, and the eNB2 sends a handover request acknowledgement message to the eNB1, where the message carries the configuration parameter of the target cell accepting the handover request, and the eNB1 The UE sends a handover command message, so that the UE accesses the target cell according to the configuration parameter of the target cell of the eNB2.
  • FIG. 9 is a schematic flowchart of a handover optimization method according to an embodiment of the present invention, where the reestablishment of a reconfigurable cell security parameter of an RN node carried in a handover request message is performed, specifically:
  • the UE sends a measurement report to the eNB1, where the measurement report carries the measurement result of multiple cells.
  • the eNB1 performs a handover decision according to the measurement result of the measurement report.
  • the eNB1 selects one cell of the RN node as the target cell.
  • the eNB1 sends a handover request message to the eNB2, where the message carries a list of reconfigurable cells of the eNB2 and the RN node.
  • the reconfigurable cell list includes security parameters of each reconfigurable cell shortMAC-L
  • the eNB2 sends a handover request message to the RN node, where the message carries a reconfigurable cell security parameter list of the RN node.
  • the RN node If the target cell of the RN node accepts the handover request, the RN node sends a handover request acknowledgement message to the eNB2, where the message carries configuration parameters of the target cell of the RN node.
  • the eNB2 sends a handover request acknowledgement message to the eNB1. 908.
  • the eNB1 sends a handover command to the UE, where the command carries configuration parameters and reconfigurable security parameters of the target cell of the RN node.
  • the UE receives the message and performs handover to the target cell. If the UE fails to perform the handover according to the configuration parameter failure or the switch timer expires, the UE selects the cell according to the signal quality to perform the reconstruction.
  • the UE sends an RC connection reestablishment request to the cell, where the request uses the security parameter of the reconfigurable cell of the cell to perform the access layer AS. safety protection.
  • the eNB1 selects a cell under the RN as the target cell, and the eNB1 sends a handover request message to the eNB2, where the message carries the eNB2 and other reconfigurable cell security parameters of the RN, thereby reducing the eNB1 needs to send to the eNB2 after the handover failure.
  • the security parameter of the cell can be reconstructed, and the signaling overhead in the handover process is included in the case where the mobile station includes the relay station, and the handover control plane delay is reduced.
  • FIG. 10 is a schematic structural diagram of a relay node according to an embodiment of the present invention, including:
  • the transceiver module 101 is configured to receive a handover request message, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells, and the transceiver module is further configured to perform The confirmation result of the confirmation module sends a handover request acknowledgement message, where the handover request acknowledgement message carries the identifier of the cell that accepts the handover request;
  • the confirmation module 102 is configured to confirm that one of the cells in the set of cells under the node accepts the handover request.
  • the transceiver module is configured to receive a handover request message that carries an identifier of at least two target cells in a cell set under the eNB, where the cell set includes at least two target cells.
  • the transceiver module is configured to receive a handover request message that carries an identifier of at least two target cells in a cell set under the RN, where the cell set includes at least two target cells; or The transceiver module is configured to receive a cell set carrying the RN a handover request message of the identifier of the at least one target cell and the identifier of the at least one candidate cell, where the set of cells includes at least one target cell and at least one candidate cell; or the transceiver module is configured to receive the RN A handover request message of at least one target cell identifier in the set of cells, the set of cells comprising at least one target cell and at least one candidate cell.
  • the acknowledgment module is configured to confirm that one target cell in the cell set under the RN accepts the handover request, or is used to confirm that all target cells in the cell set under the RN reject the handover request, One candidate cell or one candidate cell in the set of cells accepts the handover request.
  • the acknowledgment module is further configured to confirm that all cells in the cell set under the RN reject the handover request;
  • the transceiver module is further configured to: after the confirming module confirms that all cells in the cell set under the RN reject the handover request, send a handover to a cell set under the direct neighboring node of the RN. Preparing a failure message, so that the direct neighboring node of the RN sends a handover request to the upper node of the immediate neighboring node after determining that one of the cell sets under the direct neighboring node accepts the handover request And an acknowledgement message, where the handover request acknowledgement message carries the identifier of the cell that accepts the handover request.
  • the acknowledgment module is configured to confirm that all target cells in the cell set under the RN reject the handover request, and one candidate cell in the cell set accepts the handover request, and the transceiver module further And a security key parameter of the target cell under the direct neighboring node that is sent by the directly neighboring node of the RN, where the target cell is a target cell that is confirmed by the direct neighboring node.
  • the handover request message carries the cell identifier in the cell set under the node, and if one cell in the cell set under the communication node accepts the handover request, the communication node sends a handover request acknowledgement message, where The handover request acknowledgement message carries the identifier of the cell that accepts the handover request, thereby avoiding that a cell of the communication node refuses to switch
  • the direct neighboring node of the lower node of the communication node also needs to repeatedly send a handover request message to the communication node or the directly adjacent node of the communication node, thereby reducing the signaling overhead in the handover process and reducing the handover control plane. Delay.
  • FIG. 11 is a schematic structural diagram of a communication system according to an embodiment of the present invention, including:
  • the relay node 110 is configured to receive, in the handover preparation process, a handover request message sent by the base station, where the handover request message carries an identifier of a cell in a cell set under the node, where the cell set includes at least two cells; And when the cell in the cell set accepts the handover request, sending a handover request acknowledgement message, where the handover request acknowledgement message carries the identifier of the cell that accepts the handover request.
  • the relay node is further configured to: when all the cells in the cell set reject the handover request, send a handover preparation failure message to the base station.
  • the communication system further includes a base station 111, configured to receive a handover request message sent by the upper-level node, where the handover request message carries an identifier of the cell in the cell set under the base station, and the middle And following the identifier of the cell in the cell set under the node, the cell set under the base station includes at least one cell, configured to send a handover request message to the relay node, and configured to receive the handover preparation failure sent by the relay node a message, and a cell in the cell set under the base station receives the handover request, and sends a handover request acknowledgement message to the upper node, where the handover request acknowledgement message carries the identity and handover of the cell that accepts the handover request Instructing, the handover indication is an indication that the base station accepts a handover request, and the relay node rejects the handover request;
  • the base station includes:
  • the transceiver module 1111 is configured to receive a handover request message sent by the upper node, where the handover request message carries an identifier of a cell in a cell set under the base station and an identifier of a cell in a cell set under the relay node,
  • the cell set under the base station includes at least one cell, configured to send a handover request message to the relay node, and configured to receive a handover preparation failure message sent by the relay node, and the confirming module confirms the base station a cell in the set of cells
  • Receiving the handover request sending a handover request acknowledgement message to the upper-level node, where the handover request acknowledgement message carries an identifier and a handover indication of the cell that accepts the handover request, where the handover indication is that the base station accepts a handover request,
  • the relay node rejects the indication of the handover request;
  • the acknowledgment module 1112 is configured to acknowledge, by the one of the cell sets under the RN, the handover request.
  • the handover request message carries the cell identifier in the cell set under the node, and if one cell in the cell set under the communication node accepts the handover request, the communication node sends a handover request acknowledgement message, where The handover request acknowledgement message carries the identifier of the cell that accepts the handover request, thereby avoiding that, after a cell of the communication node rejects the handover request, the direct neighboring node of the lower node of the communication node needs to send to the communication node or the The communication node directly transmits the handover request message directly to the neighboring node, thereby reducing the signaling overhead in the handover process and reducing the handover control plane delay.
  • the present invention can be implemented by means of software and a necessary general hardware platform. Of course, it can also be through hardware, but in many cases, the former is more Good implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, a server, or a network device, etc.) performs the method of various embodiments of the present invention.

Description

一种通信系统切换准备方法、 中继节点、 通信系统 本申请要求于 2009 年 12 月 31 日提交中国专利局、 申请号为 200910238888.1、 发明名称为"一种通信系统切换准备方法、 中继节点、 通 信系统"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明涉及移动通信通技术领域, 具体涉及一种通信系统切换准备方 法、 中继节点、 通信系统。 背景技术 随着通讯技术的不断发展, 中继 Relay技术作为一种关键技术被提出, 用于提高小区容量和扩展覆盖, 在网络中部署中继站 (Relay Node , RN ), 可以增强基站和终端之间的无线通信信号, 此外, RN还具有硬件成本以及 部署成本相对较低的优势及部署灵活等特性。 引入 RN后, UE和基站之间 的单跳空口链路被分为两段, 包括接入链路和回程链路, 其中接入链路为 UE和基站之间或者 UE和 RN之间的链路; 回程链路为 RN和基站之间的 链路, 也可以称为中继链路。
随着中继站的引入, 由于增加一段回程链路的空口传输时间, 从而导 致同一消息在两个节点之间多次发送, 增加了信令开销, 并且造成切换准 备时间过长而导致切换失败。
发明内容 本发明实施例提供一种通信系统切换准备方法、 中继节点、 通信系统, 以减少切换过程中的信令开销。
一方面, 本发明实施例提供了一种通信系统切换准备方法, 包括: 通信节点接收切换请求消息, 所述切换请求消息携带所述节点下的小 区集合中的小区的标识, 所述小区集合包括至少两个小区;
若所述通信节点下的小区集合中的一个小区接受所述切换请求; 所述通信节点发送切换请求确认消息, 所述切换请求确认消息携带所 述接受所述切换请求的小区的标识。
一方面, 本发明实施例提供了一种通信节点, 包括:
收发模块, 用于接收切换请求消息, 所述切换请求消息携带所述节点 下的小区集合中的小区的标识, 所述小区集合包括至少两个小区;
确认模块, 用于确认所述节点下的所述小区集合中的一个小区接受所 述切换请求;
所述的收发模块还用于根据所述确认模块的确认结果发送切换请求确 认消息, 所述切换请求确认消息携带所述接受切换请求的小区的标识。
再一方面, 本发明实施例提供了一种通信系统, 包括:
中继节点, 用于在切换准备过程中, 接收基站发送的切换请求消息, 所述切换请求消息携带所述节点下的小区集合中的小区的标识, 所述小区 集合包括至少两个小区; 以及在所述小区集合中的一个小区接受所述切换 请求时, 发送切换请求确认消息, 所述切换请求确认消息携带所述接受切 换请求的小区的标识。
本发明实施例通过切换请求消息中携带节点下小区集合中的小区标 识, 若所述通信节点下的小区集合中的一个小区接受所述切换请求, 所述 通信节点发送切换请求确认消息, 所述切换请求确认消息携带所述接受所 述切换请求的小区的标识, 从而避免了由于通信节点的一个小区拒绝切换 请求后, 该通信节点的下级节点的直接相邻节点还需要向该通信节点或该 通信节点直接相邻节点重复发送切换请求消息, 从而减少了切换过程中信 令开销, 减小切换控制面时延。 附图说明 为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述 中所需要使用的附图作简要介绍, 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, 对于本领域的普通技术人员来讲, 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为本发明实施例一的通信系统切换准备方法的流程示意图; 图 2为本发明实施例二的通信系统切换准备方法的流程示意图; 图 3为本发明实施例三的通信系统切换准备方法的流程示意图; 图 4为本发明实施例四的通信系统切换准备方法的流程示意图; 图 5为本发明实施例五的通信系统切换准备方法的流程示意图; 图 6为本发明实施例六的通信系统切换准备方法的流程示意图; 图 Ί为本发明实施例七的通信系统切换准备方法的流程示意图; 图 8为本发明实施例八的通信系统切换准备方法的流程示意图; 图 9为本发明实施例九的通信系统切换准备方法的流程示意图; 图 10为本发明实施例的中继节点的结构示意图;
图 11为本发明实施例的通信系统的一种结构示意图;
图 12为本发明实施例的通信系统的另一种结构示意图;
图 13为本发明实施例的通信系统中的基站的结构示意图。
具体实施方式 为了使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对 本发明作进一步地详细描述, 显然, 所描述的实施例仅仅是本发明一部份 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前提下所获得的所有其它实施例, 都属于本发 明保护的范围。 图 1为本发明实施例一的通信系统准备方法的流程示意图, 包括:
101、 通信节点接收切换请求消息, 所述切换倚求消息携带所述节点下 的小区集合中的小区的标识, 所述小区集合包括至少两个小区;
102、 若所述通信节点下的小区集合中的一个小区接受所述切换请求;
103、 所述通信节点发送切换请求确认消息, 所述切换请求确认消息携 带所述接受所述切换请求的小区的标识。
本发明实施例通过切换请求消息中携带节点下小区集合中的小区标 识, 若所述通信节点下的小区集合中的一个小区接受所述切换请求, 所述 通信节点发送切换请求确认消息, 所述切换请求确认消息携带所述接受所 述切换请求的小区的标识, 从而避免了由于通信节点的一个小区拒绝切换 请求后, 该通信节点的下级节点的直接相邻节点还需要向该通信节点或该 通信节点直接相邻节点重复发送切换请求消息, 从而减少了切换过程中信 令开销, 减小切换控制面时延。
图 2 为本发明实施例二的通信系统的切换优化方法的流程示意图, 通 过切换请求消息中携带 RN 节点的多个目标小区的小区标识和安全密钥参 数进行切换, 具体包括:
201、 UE向 eNBl 发送测量报告, 该测量报告携带多个小区的测量结 杲;
202、 eNBl根据该测量报告的测量结果进行切换判决;
203、若 eNBl决定进行切换, eNBl根据测量结果选择 RN节点的多个 小区作为目标小区;
204、 eNB 1向 eNB2发送切换请求消息, 该消息携带 RN节点的多个目 标小区的小区标识和安全密钥参数;
其中, 小区标识用于标识小区, 例如 E-UTRAN小区全球标识 (ECGI); 安全密钥参数用于 UE 与接受切换请求的目标小区数据交互时使用所述接 受切换请求的目标小区的安全密钥参数进行接入层 AS安全保护。 205、 eNB2向 RN节点发送切换请求消息,该消息携带所述 RN节点的 多个目标小区的小区标识和安全密钥参数;
206、 RN 节点依次判断多个目标小区中每个目标小区是否能够接受该 切换请求, 直至多个目标小区中的某个目标小区接受该切换请求;
207、 RN节点向 eNB2发送切换请求确认消息, 该消息携带该接受切 换请求目标小区的配置参数;
其中配置参数包括目标小区标识、 目标小区安全算法标识、 目标小区 系统消息等。
208、 eNB2向 eNBl转发该切换请求确认消息;
209、 eNBl收到切换请求确认消息后, 获知切换请求被接受, 则向 UE 发送切换命令消息, 该消息携带该接受切换请求目标小区的配置参数; 210、 UE根据该接受切换请求目标小区的配置参数接入目标小区。 本发明实施例通过切换请求消息中携带 RN 节点的多个目标小区的小 区标识和安全密钥参数进行切换,从而避免了由于 RN的一个小区拒绝切换 请求后, eNB 1还需要从向 RN或 eNB2重复发送切换请求消息, 减少了切 换过程中信令开销, 减小切换控制面时延。
图 3 为本发明实施例二的通信系统的切换优化方法的流程示意图, 通 过切换请求消息中携带 RN节点和 eNB2的多个目标小区的小区标识和安 全密钥参数进行切换, 该实施例的步骤 301、 302、 308、 310、 311 与实施 例的步骤 201、 202、 208、 209、 210类似, 不同之处在于:
303、若 eNBl决定进行切换, eNBl根据测量结杲选择 RN节点和 eNB2 的多个小区作为目标小区;
304、 eNBl向 eNB2发送切换请求消息, 该消息携带 RN节点和 eNB2 的多个目标小区的小区标识和安全密钥参数;
其中, 小区标识用于标识小区, 例如 E-UTRAN小区全球标识 (ECGI); 安全密钥参数用于 UE 与接受切换请求的目标小区数据交互时使用所述接 受切换请求的目标小区的安全密钥参数进行接入层 AS安全保护。
305、 eNB2向 RN节点发送切换请求消息,该消息携带所述 RN节点的 多个目标小区的小区标识和安全密钥参数;
其中, eNB2向 RN节点发送切换请求消息不同于 eNB2接收到的切换 请求消息, eNB2向 RN节点发送切换请求消息为 eNB2重新生成新的切换 请求消息, 该生成新的切换请求消息与收到的切换请求消息的不同在于只 携带 RN节点的多个目标小区的小区标识和安全密钥参数。
306、 RN 节点根据目标小区优先级高低依次判断多个目标小区中每个 目标小区的是否能够接受该切换请求;
其中, 每个目标小区的优先级根据目标小区的小区标识信号质量的优 劣进行排列或随机排列。
307、 若多个目标小区都不满足切换条件而拒绝该切换请求, RN 向 eNB2发送切换准备失败消息;
其中, 不满足切换条件的原因可以包括小区负载过重、 小区为受限小 区或安全算法不匹配等。
308、 eNB2收到该消息后, 根据 eNB2 的目标小区优先级高低依次判 断多个目标小区中每个目标小区的是否能够接受该切换请求, 直至多个目 标小区中的某个目标小区接受该切换请求;
309、 eNB2向 eNBl发送该切换请求确认消息, 该消息携带 eNB2的目 标小区的配置参数;
其中配置参数包括目标小区标识、 目标小区安全算法标识、 目标小区 系统消息等。
其中, 每个目标小区的优先级根据目标小区的小区标识信号质量的优 劣进行排列或随机排列。
本发明实施例通过切换请求消息中携带 RN和 eNB2 的多个目标小区 的小区标识和安全密钥参数进行切换,从而避免了由于 RN的一个小区拒绝 切换请求后, eNBl还需要从向 RN或 eNB2重复发送切换请求消息, 减少 了切换过程中信令开销, 减小切换控制面时延。
图 4 为本发明实施例四的通信系统的切换优化方法的流程示意图, 通 过切换请求消息中携带的 RN 节点的一个目标小区的小区标识和安全密钥 参数,和 RN节点的多个候选小区的小区标识和安全密钥参数进行切换,该 实施例的步骤 401与步骤 402与实施例二的步骤 201、 步骤 202类似, 不同 之处在于:
403、若 eNBl决定进行切换, eNBl根据测量结果选择 RN节点的一个 小区作为目标小区, 选择 RN节点的多个小区作为候选小区;
404、 eNBl向 eNB2发送切换请求消息, 该消息携带 RN节点的一个目 标小区的小区标识和安全密钥参数,和 RN节点的多个候选小区的小区标识 和安全密钥参数;
405、 eNB2向 RN节点发送切换请求消息,该消息携带 RN节点的一个 目标小区的小区标识和安全密钥参数,和 RN节点的多个候选小区的小区标 识和安全密钥参数;
406、 若 RN节点的目标小区由于不满足切换条件而拒绝该切换请求, RN节点进一步判断候选小区是否能够接受该切换请求;
407、 若 RN节点的多个候选小区中的一个候选小区接受该切换请求, 选择该接受切换倚求的候选小区作为目标小区;
408、 RN节点向 eNB2发送切换请求确认消息,该消息携带 RN节点的 目标小区的配置参数;
409、 eNB2向 eNBl 转发该切换请求确认消息, 该消息携带目标小区 的配置参数;
410、 eNBl收到切换请求确认消息后, eNBl判断是否接受该 eNB2所 选择的目标小区;
411、 若 eNBl接受该 eNB2所选择的目标小区, 则向 UE发送切换命 令消息, 该消息携带所述 eNB2的目标小区的配置参数;
412、 UE根据 eNB2的目标小区的配置参数接入目标小区。
本发明实施例通过切换请求消息中携带的 RN 节点的一个目标小区的 小区标识和安全密钥参数,和 RN节点的多个候选小区的小区标识和安全密 钥参数进行切换, 从而避免了由于 RN的一个小区拒绝切换请求后, eNBl 还需要向 RN或 eNB2重复发送切换请求消息,减少了切换过程中信令开销, 减小切换控制面时延。
图 5 为本发明实施例五的通信系统的切换优化方法的流程示意图, 通 过切换请求消息中携带 RN 节点的一个目标小区的小区标识和安全密钥参 数, 和携带 RN节点和 eNB2 的多个候选小区的小区标识和安全密钥参数 进行切换, 该实施例的步骤 501、 502与实施例四的步骤 401、 402类似 , 不同之处在于:
503、若 eNBl决定进行切换, eNBl根据测量结果选择 RN节点的一个 小区作为目标小区, 和选择 RN节点和 eNB2的多个小区作为候选小区;
504、 eNBl向 eNB2发送切换请求消息, 该消息携带 RN节点的目标小 区的小区标识和安全密钥参数,和携带 RN节点和 eNB2的多个候选小区的 小区标识和安全密钥参数;
505、 eNB2向 RN节点发送切换请求消息,该消息携带 RN节点的目标 小区的小区标识和安全密钥参数,和携带 RN节点的多个候选小区的小区标 识和安全密钥参数;
506、 若 RN节点的目标小区由于不满足切换条件而拒绝该切换请求, RN节点判断候选小区是否可以接受该切换请求;
507、 若多个候选小区都不能接受切换请求, RN节点向 eNB2发送切 换准备失败消息;
508、 若 eNB2多个候选小区中的一个候选小区接受该切换请求, 选择 该接受切换请求的候选小区作为目标小区; 509、 eNB2向 eNBl发送切换请求确认消息, 该消息携带所述 eNB2的 目标小区的配置参数和切换指示,该切换指示为 RN节点拒绝切换请求的指 示、 eNB2接受切换请求的指示;
510、 eNBl收到切换请求确认消息后,获知 eNB2接受切换请求, eNBl 判断是否接受该 eNB2的目标小区;
511、 若 eNBl接受该 eNB2的目标小区, 则向 UE发送切换命令, 该 切换命令携带该 eNB2的目标小区的配置参数;
512、 UE根据该 eNB2的目标小区的配置参数接入目标小区。
本发明实施例通过切换请求消息中携带 RN 节点的一个小区作为目标 小区, 和选择 RN节点和 eNB2的多个小区作为候选小区进行切换, 从而避 免了由于 RN的一个小区拒绝切换请求后, eNBl还需要向 RN或 eNB2重 复发送切换请求消息, 减少了切换过程中信令开销, 减小切换控制面时延。
如图 6所示,本发明的实施例还可以通过切换请求消息中携带 RN节点 的一个目标小区的小区标识与安全密钥参数进行切换,若 RN节点的目标小 区由于不满足切换条件而拒绝该切换请求, RN节点进一步判定除该目标小 区之外的备选小区是否能够接受该切换请求, 该备选小区为 RN 和 DeNB 下除目标小区和候选小区之外的小区,若该 RN节点的备选小区中某个小区 接受该切换请求消息, 选择该接受切换请求的小区作为目标小区, RN节点 通过 eNB2将携带目标小区配置参数的切换请求确认消息发送给 eNBl, 若 eNBl接受该 RN节点所选择的目标小区, eNBl向 eNB2发送该目标小区的 安全密钥参数, eNB2向 RN转发该安全密钥参数, 同时 eNBl向 UE发送 切换命令消息, 以使 UE根据该 RN节点的配置参数接入目标小区。
如图 7所示,本发明的实施例还可以通过切换请求消息中携带 RN节点 的一个目标小区的小区标识与安全密钥参数进行切换,若 RN节点的目标小 区不满足切换条件拒绝该切换请求,继续判定 RN节点除该目标小区之外的 备选小区是否能够接受该切换请求,若 RN节点的备选小区都不能够接受该 切换请求,进一步判断 eNB2的备选小区是否能够接受该切换请求,若 eNB2 的备选小区中某一小区能够接受该切换请求,则选择 eNB2的接受切换请求 的小区作为目标小区, 若 eNBl接受该 eNB2的目标小区, eNBl 向 eNB2 发送该目标小区的安全密钥参数, 同时 eNBl向 UE发送切换命令消息, 以 使 UE根据该 RN节点的配置参数接入目标小区。
如图 8所示, 本发明实施例还可以不包含中继节点, 通过切换请求消 息中携带 eNB2 的多个目标小区的小区标识和安全密钥参数进行切换, eNB2依次判断多个目标小区中每个目标小区是否能够接受该切换请求, 直 至多个目标小区中的某个目标小区接受该切换请求, eNB2向 eNBl发送切 换请求确认消息, 该消息携带该接受切换请求目标小区的配置参数, eNBl 向 UE发送切换命令消息, 以使 UE根据该 eNB2的目标小区的配置参数接 入目标小区。
图 9 为本发明实施例的切换优化方法的流程示意图, 通过切换请求消 息中携带的 RN节点的可重建小区安全参数进行重建, 具体包括:
901、 UE向 eNBl 发送测量报告, 该测量报告携带多个小区的测量结 果;
902、 eNBl根据该测量报告的测量结果进行切换判决;
903、 eNBl选择 RN节点的一个小区作为目标小区;
904、 eNBl向 eNB2发送切换请求消息, 该消息携带 eNB2和 RN节点 的可重建小区列表;
该可重建小区列表中包含各个可重建小区的安全参数 shortMAC-L
905、 eNB2向 RN节点发送切换请求消息,该消息携带该 RN节点的可 重建小区安全参数列表;
906、 若 RN节点的目标小区接受该切换请求, 则 RN节点向 eNB2发 送切换请求确认消息, 该消息携带该 RN节点的目标小区的配置参数;
907、 eNB2向 eNBl转发送切换请求确认消息; 908、 eNBl向 UE发送切换命令, 该命令携带该 RN节点的目标小区的 配置参数与可重建安全参数;
909、 UE收到该消息向目标小区进行切换, 若 UE根据该配置参数配 置失败或切换计时器过期等原因导致切换失败,则 UE根据信号质量选择小 区进行重建;
910、可选的,若 UE选择的小区为可重建小区安全参数列表中的小区, 则 UE向该小区发送 R C连接重建请求, 该请求使用该小区的可重建小区 的安全参数进行接入层 AS安全保护。
本发明实施例通过 eNBl选择 RN下的一个小区作为目标小区, eNBl 向 eNB2发送切换请求消息, 该消息携带 eNB2和 RN下其它可重建小区安 全参数,从而减少了切换失败后 eNBl还需要向 eNB2发送可重建小区的安 全参数, 在移动通信系统中包含中继站的情况下切换过程中信令开销, 减 小切换控制面时延。
图 10为本发明实施例中继节点的结构示意图, 包括:
收发模块 101, 用于接收切换请求消息, 所述切换请求消息携带所述节 点下的小区集合中的小区的标识, 所述小区集合包括至少两个小区; 所述 的收发模块还用于根据所述确认模块的确认结果发送切换请求确认消息, 所述切换请求确认消息携带所述接受切换请求的小区的标识;
确认模块 102,用于确认所述节点下的所述小区集合中的一个小区接受 所述切换请求。
其中, 若所述节点为 eNB, 所述收发模块用于接收携带所述 eNB下的 小区集合中的至少两个目标小区的标识的切换请求消息, 所述小区集合包 括至少两个目标小区。
其中, 若所述节点为 RN, 所述收发模块用于接收携带所述 RN下的小 区集合中的至少两个目标小区的标识的切换请求消息, 所述小区集合包括 至少两个目标小区; 或者,所述收发模块用于接收携带所述 RN下的小区集 合中的至少一个目标小区的标识与至少一个候选小区的标识的切换请求消 息, 所述小区集合包括至少一个目标小区与至少一个候选小区; 或者, 所 述收发模块用于接收携带所述 RN 下的小区集合中的至少一个目标小区标 识的切换请求消息, 所述小区集合包括至少一个目标小区与至少一个备选 小区。
其中,所述确认模块用于确认所述 RN下的小区集合中的一个目标小区 接受所述切换请求; 或者,用于确认所述 RN下的小区集合中的全部目标小 区拒绝所述切换请求, 所述小区集合中一个候选小区或一个备选小区接受 所述切换请求。
其中,所述确认模块,还用于确认所述 RN下的小区集合中的小区全部 拒绝所述切换请求;
其中,所述的收发模块,还用于在所述确认模块确认所述 RN下的小区 集合中的小区全部拒绝所述切换请求后,向所述 RN的直接相邻节点下的小 区集合发送切换准备失败消息,以使得所述 RN的直接相邻节点在确定所述 直接相邻节点下的小区集合中的一个小区接受所述切换请求后, 向所述直 接相邻节点的上级节点发送切换请求确认消息, 所述切换请求确认消息携 带所述接受所述切换请求的小区的标识。
其中,所述确认模块用于确认所述 RN下的小区集合中的全部目标小区 拒绝所述切换请求, 且所述小区集合中的一个备选小区接受所述切换请求, 所述的收发模块还用于接收所述 RN的直接相邻节点发送的、所述直接相邻 节点下的目标小区的安全密钥参数, 所述目标小区为所述直接相邻节点确 认的目标小区。
本发明实施例通过切换请求消息中携带节点下小区集合中的小区标 识, 若所述通信节点下的小区集合中的一个小区接受所述切换请求, 所述 通信节点发送切换请求确认消息, 所述切换请求确认消息携带所述接受所 述切换请求的小区的标识, 从而避免了由于通信节点的一个小区拒绝切换 请求后, 该通信节点的下级节点的直接相邻节点还需要向该通信节点或该 通信节点直接相邻节点重复发送切换请求消息, 从而减少了切换过程中信 令开销, 减小切换控制面时延。
图 11为本发明实施例通信系统的结构示意图, 包括:
中继节点 110,用于在切换准备过程中,接收基站发送的切换请求消息, 所述切换请求消息携带所述节点下的小区集合中的小区的标识, 所述小区 集合包括至少两个小区; 以及在所述小区集合中的一个小区接受所述切换 请求时, 发送切换请求确认消息, 所述切换请求确认消息携带所述接受切 换请求的小区的标识。
其中, 所述中继节点, 还用于在所述小区集合中的全部小区拒绝所述 切换请求时, 向所述基站发送切换准备失败消息。
近一步, 如图 12所示, 该通信系统还包括基站 111, 用于接收上级节 点发送的切换请求消息, 所述切换请求消息携带所述基站下的小区集合中 的小区的标识与所述中继节点下的小区集合中的小区的标识, 所述基站下 的小区集合包括至少一个小区; 用于向中继节点发送切换请求消息; 以及 用于接收到所述中继节点发送的切换准备失败消息, 且所述基站下的小区 集合中的一个小区接受所述切换请求时, 向所述上级节点发送切换请求确 认消息, 所述切换请求确认消息携带所述接受切换请求的小区的标识与切 换指示, 所述切换指示为所述基站接受切换请求、 所述中继节点拒绝切换 请求的指示;
进一步, 如图 13所示, 所述基站包括:
收发模块 1111, 用于接收上级节点发送的切换请求消息, 所述切换倚 求消息携带所述基站下的小区集合中的小区的标识与所述中继节点下的小 区集合中的小区的标识, 所述基站下的小区集合包括至少一个小区; 用于 向中继节点发送切换请求消息, 以及用于接收到所述中继节点发送的切换 准备失败消息, 且所述确认模块确认所述基站下的小区集合中的一个小区 接受所述切换请求时, 向所述上级节点发送切换请求确认消息, 所述切换 请求确认消息携带所述接受切换请求的小区的标识与切换指示, 所述切换 指示为所述基站接受切换请求、 所述中继节点拒绝切换请求的指示;
确认模块 1112, 用于所述确认所述 RN下的小区集合中的一个小区接 受所述切换请求。
本发明实施例通过切换请求消息中携带节点下小区集合中的小区标 识, 若所述通信节点下的小区集合中的一个小区接受所述切换请求, 所述 通信节点发送切换请求确认消息, 所述切换请求确认消息携带所述接受所 述切换请求的小区的标识, 从而避免了由于通信节点的一个小区拒绝切换 请求后, 该通信节点的下级节点的直接相邻节点还需要向该通信节点或该 通信节点直接相邻节点重复发送切换请求消息, 从而减少了切换过程中信 令开销, 减小切换控制面时延。
在通过以上的各实施例的描述, 本领域的技术人员可以清楚地了解到 本发明可借助软件及必需的通用硬件平台的方式来实现, 当然, 也可以通 过硬件, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明 的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形 式体现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令用 以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例该的方法。
虽然通过参照本发明的某些优选实施方式, 已经对本发明进行了图示 和描述, 但本领域的普通技术人员应该明白, 可以在形式上和细节上对其 作各种改变, 而不偏离本发明的精神和范围。

Claims

权利要求
1、 一种通信系统切换准备方法, 其特征在于, 包括:
通信节点接收切换请求消息, 所述切换请求消息携带所述通信节点下 小区集合中小区的标识, 所述小区集合包括至少两个小区;
所述通信节点下小区集合中一个小区接受所述切换请求;
所述通信节点发送切换请求确认消息, 所述切换请求确认消息携带所 述接受所述切换请求的小区的标识。
2、 根据权利要求 1所述的方法, 其特征在于,
若所述通信节点为基站 eNB, 所述切换请求消息携带所述通信节点下小 区集合中小区的标识, 包括: 所述切换请求消息携带所述 eNB下小区集合中 至少两个目标小区的标识;
所述至少两个小区包括至少两个目标小区。
3、 根据权利要求 1所述的方法, 其特征在于,
若所述通信节点为中继节点 RN , 所述切换请求消息携带所述通信节点 下小区集合中小区的标识, 包括:
所述切换请求消息携带所述 RN下小区集合中至少两个目标小区的标 识; 所述至少两个小区包括至少两个目标小区; 或者
所述切换请求消息携带所述 RN下小区集合中至少一个目标小区的标识 与至少一个候选小区的标识; 所述至少两个小区包括至少一个目标小区与 至少一个候选小区; 或者
所述切换请求消息携带所述 RN下小区集合中至少一个目标小区的标 识; 所述至少两个小区包括至少一个目标小区与至少一个备选小区。
4、 根据权利要求 3所述的方法, 其特征在于, 所述通信节点下小区集 合中一个小区接受所述切换请求包括: 所述 RN下小区集合中一个目标小区接受所述切换请求; 或者 如果所述 RN下小区集合中全部目标小区拒绝所述切换请求, 所述小区 集合中一个候选小区或一个备选小区接受所述切换请求。
5、 根据权利要求 4所述的方法, 其特征在于, 若所述 RN下小区集合中 小区全部拒绝所述切换请求, 所述方法还包括:
所述 RN向直接相邻节点下小区集合发送切换准备失败消息, 以使得所 述直接相邻节点在确定所述直接相邻节点下小区集合中一个小区接受所述 切换请求后, 向所述直接相邻节点的上级节点发送切换请求确认消息, 所 述切换请求确认消息携带所述接受所述切换请求的小区的标识。
6、 根据权利要求 4所述的方法, 其特征在于, 若一个备选小区接受所 述切换请求消息, 所述方法还包括:
所述 RN接收直接相邻节点发送的所述接受切换请求消息的备选小区安 全密钥参数, 所述目标小区为所述直接相邻节点确认的目标小区, 以使得 切换成功后, 用户终端 UE与接受切换请求的小区进行数据交互时, 使用所 述接受切换请求小区的安全密钥参数进行接入层 AS安全保护。
7、根据权利要求 4所述的方法, 其特征在于, 所述 RN为 eNB的下级节点, 所述方法还包括:
所述 RN接收 eNB发送的切换请求消息, 所述切换请求消息携带所述 RN下 小区集合中小区的标识和所述 eNB下小区集合中小区的标识, 所述 eNB下小 区集合包括至少一个小区, 所述 M下小区集合包括至少两个小区;
若所述 RN下小区集合中小区全部拒绝所述切换请求,所述 RN向所述 eNB 发送切换准备失败消息, 以使得所述 eNB下小区集合中一个小区接受所述切 换请求时, 所述 eNB发送切换倚求确认消息, 所述切换请求确认消息携带所 述接受切换请求的小区的标识与切换指示, 所述切换指示为所述 eNB接受切 换请求或所述 RN拒绝切换请求的指示。
8、 根据权利要求 1所述的方法, 其特征在于,
所述切换请求消息还携带所述节点下小区集合中小区的安全密钥参 数, 以使得切换成功后, 用户终端 UE与接受切换请求的小区进行数据交互 时, 使用所述接受切换请求小区的安全密钥参数进行接入层 AS安全保护。
9、 一种通信节点, 其特征在于, 包括:
收发模块, 用于接收切换请求消息, 所述切换请求消息携带所述通信节 点下小区集合中小区的标识, 所述小区集合包括至少两个小区;
确认模块, 用于根据所述收发模块接收的所述切换请求消息确认所述节 点下所述小区集合中一个小区接受所述切换倚求;
所述的收发模块还用于根据所述确认模块的确认结果发送切换请求确 认消息, 所述切换请求确认消息携带所述接受切换请求的小区的标识。
1 0、 根据权利要求 9所述的节点, 其特征在于,
若所述通信节点为基站 eNB, 所述收发模块具体用于接收携带所述 eNB 下小区集合中至少两个目标小区的标识的切换请求消息, 所述至少两个小 区包括至少两个目标小区。
1 1、 根据权利要求 9所述的节点, 其特征在于,
若所述通信节点为中继节点 RN, 所述收发模块具体用于接收携带所述 R 下小区集合中至少两个目标小区的标识的切换请求消息, 所述至少两个 小区包括至少两个目标小区; 或者具体用于接收携带所述 RN下小区集合中 至少一个目标小区的标识与至少一个候选小区的标识的切换请求消息, 所 述至少两个小区包括至少一个目标小区与至少一个候选小区; 或者具体用 于接收携带所述 RN下小区集合中至少一个目标小区标识的切换请求消息, 所述至少两个小区包括至少一个目标小区与至少一个备选小区。
12、 根据权利要求 11所述的节点, 其特征在于,
所述确认模块具体用于确认所述 RN下小区集合中一个目标小区接受所 述切换请求; 或者具体用于如果所述 M下小区集合中全部目标小区拒绝所 述切换请求, 确认所述小区集合中一个候选小区或一个备选小区接受所述 切换请求。
1 3、 根据权利要求 11或 12所述的节点, 其特征在于,
所述确认模块还用于确认所述 RN下小区集合中小区全部拒绝所述切换 请求;
所述的收发模块还用于在所述确认模块确认所述 M下小区集合中小区 全部拒绝所述切换请求后, 向所述 RN的直接相邻节点下小区集合发送切换 准备失败消息, 以使得所述 M的直接相邻节点在确定所述直接相邻节点下 小区集合中一个小区接受所述切换请求后, 向所述直接相邻节点的上级节 点发送切换请求确认消息, 所述切换请求确认消息携带所述接受所述切换 请求的小区的标识。
14、 根据权利要求 12所述的节点, 其特征在于,
当所述确认模块用于确认所述 RN下小区集合中全部目标小区拒绝所述 切换请求, 且所述小区集合中一个备选小区接受所述切换请求时, 所述的 收发模块还用于接收所述 的直接相邻节点发送的、 所述接受切换请求消 息的备选小区安全密钥参数, 所述目标小区为所述直接相邻节点确认的目 标小区。
15、 一种通信系统, 其特征在于, 包括:
中继节点, 用于在切换准备过程中, 接收基站发送的切换请求消息, 所述切换请求消息携带所述节点下小区集合中小区的标识, 所述小区集合 包括至少两个小区; 以及在所述小区集合中一个小区接受所述切换请求时, 发送切换请求确认消息, 所述切换请求确认消息携带所述接受切换请求的 小区的标识。
16、 根据权利要求 15所述的系统, 其特征在于, 所述通信系统还包括: 基站,
所述中继节点, 还用于在所述小区集合中全部小区拒绝所述切换请求 时, 向所述基站发送切换准备失败消息;
所述基站, 用于接收上级节点发送的切换请求消息, 所述切换请求消 息携带所述基站下小区集合中小区的标识与所述中继节点下小区集合中小 区的标识, 所述基站下小区集合包括至少一个小区; 用于向中继节点发送 切换请求消息; 以及用于接收到所述中继节点发送的切换准备失败消息, 且所述基站下小区集合中一个小区接受所述切换请求时, 向所述上级节点 发送切换请求确认消息, 所述切换请求确认消息携带所述接受切换请求的 小区的标识与切换指示, 所述切换指示为所述基站接受切换请求、 所述中 继节点拒绝切换请求的指示。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479934A (en) * 2010-04-30 2011-11-02 Nokia Siemens Networks Oy Handover from a relay node

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103327475B (zh) * 2012-03-21 2017-05-24 电信科学技术研究院 一种小区切换的寻址方法以及寻址装置
CN106535267B (zh) * 2015-09-11 2019-09-27 展讯通信(上海)有限公司 Mtc终端小区切换控制方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1350758A (zh) * 1999-04-01 2002-05-22 北方电讯网络有限公司 便于多模式多导频硬切换的方法和系统
CN101180909A (zh) * 2005-03-30 2008-05-14 诺基亚公司 在路由区域改变期间减少服务中断的系统、设备、方法和程序
US20080130585A1 (en) * 2006-12-04 2008-06-05 Electronics And Telecommunications Research Institute Method for managing cross-layer handover
CN101400088A (zh) * 2007-09-30 2009-04-01 华为技术有限公司 一种演进网络中的切换方法及设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1350758A (zh) * 1999-04-01 2002-05-22 北方电讯网络有限公司 便于多模式多导频硬切换的方法和系统
CN101180909A (zh) * 2005-03-30 2008-05-14 诺基亚公司 在路由区域改变期间减少服务中断的系统、设备、方法和程序
US20080130585A1 (en) * 2006-12-04 2008-06-05 Electronics And Telecommunications Research Institute Method for managing cross-layer handover
CN101400088A (zh) * 2007-09-30 2009-04-01 华为技术有限公司 一种演进网络中的切换方法及设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479934A (en) * 2010-04-30 2011-11-02 Nokia Siemens Networks Oy Handover from a relay node
GB2479934B (en) * 2010-04-30 2014-10-01 Nokia Solutions & Networks Oy Handover preparations

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