WO2011015144A1 - 一种传输小区切换信息的方法及演进基站 - Google Patents

一种传输小区切换信息的方法及演进基站 Download PDF

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Publication number
WO2011015144A1
WO2011015144A1 PCT/CN2010/075734 CN2010075734W WO2011015144A1 WO 2011015144 A1 WO2011015144 A1 WO 2011015144A1 CN 2010075734 W CN2010075734 W CN 2010075734W WO 2011015144 A1 WO2011015144 A1 WO 2011015144A1
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Prior art keywords
cell
handover parameter
handover
base station
parameter modification
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PCT/CN2010/075734
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English (en)
French (fr)
Inventor
韩立锋
艾建勋
Original Assignee
中兴通讯股份有限公司
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Publication of WO2011015144A1 publication Critical patent/WO2011015144A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/22Performing reselection for specific purposes for handling the traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/26Reselection being triggered by specific parameters by agreed or negotiated communication parameters

Definitions

  • the present invention relates to a wireless cellular communication system, and more particularly to a method and a base station for transmitting cell handover information. Background technique
  • the Long Term Evolution (LTE) network consists of an Evolved UTRAN (E-UTRAN), an Evolved NodeB (eNB), and an Evolved Packet Core (EPC).
  • E-UTRAN Evolved UTRAN
  • eNB Evolved NodeB
  • EPC Evolved Packet Core
  • the network is flat. Chemical.
  • the E-UTRAN includes a set of eNBs connected to the EPC through the S1 interface, and the eNBs can be connected through the X2 interface.
  • the Sl and X2 interfaces are logical interfaces.
  • One EPC can manage one or more eNBs, and one eNB can also be controlled by multiple EPCs, and one eNB can manage one or more cells.
  • Self Organizing Network is a technology that automates network configuration and optimization.
  • the feature of the technology is self-configuration self-optimization.
  • the application of the technology in LTE enables the LTE base station (eNB) to automatically configure network parameters according to certain measurements and automatically optimize according to network changes, thereby maintaining optimal network performance while saving. A lot of manpower and resources.
  • the handover here refers to the handover within the LTE system and the handover between systems.
  • the handover between the systems refers to the Universal Terrestrial Radio Access Network (UTRAN) or the Global System For Mobile Communication (Global System For Mobile Communication, GSM) or Handover of Code Division Multiple Access (CDMA) systems.
  • UTRAN Universal Terrestrial Radio Access Network
  • GSM Global System For Mobile Communication
  • CDMA Code Division Multiple Access
  • the self-optimization of the handover parameters can also be used for load balancing between cells.
  • the cell reselection and the optimization of the handover parameters can solve the unevenness of the traffic load and the number of handovers and redirections for load balancing.
  • the most d, compared to the static or no self-optimized cell reselection and handover parameters, can also increase the capacity of the system.
  • the handover parameter configuration of the relevant neighboring cell it is necessary to consider the handover parameter configuration of the relevant neighboring cell, and the modification of some handover parameters may have a great influence on the handover behavior of the UE to the neighboring cell, for example, small The Cell Individual Offset (CIO), frequency specific offset, and Hysteresis parameters can trigger premature and late handover of the UE to a particular neighboring cell or all neighboring cells.
  • CIO Cell Individual Offset
  • frequency specific offset frequency specific offset
  • Hysteresis parameters can trigger premature and late handover of the UE to a particular neighboring cell or all neighboring cells.
  • the handover parameters of a cell are modified, and the relevant neighboring cells are also tampering in response.
  • Figure 1 shows the ping-pong handover between the cell (Cell) b and Cell a.
  • the UE performs ping-pong switching between the cells Cell b and Cell a due to inappropriate handover parameters between Cell b and Cell a.
  • the existing handover parameter negotiation mechanism is used to modify the handover parameters.
  • the source base station to which Cell a belongs When Cell a modifies the handover parameters of Cell a to Cell b handover, the source base station to which Cell a belongs must negotiate with the base station to which the adjacent Cell b belongs, if the opposite base station If yes, return to the negotiation confirmation. If the peer base station rejects, bring back a handover parameter modification reference value and a suitable cause value.
  • the source base station receives the handover parameter negotiation confirmation message, the new handover parameter configuration takes effect; when the handover parameter negotiation rejection message is received, the new handover parameter is not used. The next negotiation process will be re-initiated.
  • the technical problem to be solved by the present invention is to provide a method and a base station for transmitting cell handover information, thereby realizing a self-optimization function of the network.
  • the present invention discloses a method for transmitting cell handover information, including: a first base station sends a handover parameter modification negotiation request to a neighboring second base station, where the handover parameter modification negotiation request carries a preset a handover parameter configuration of a second cell governed by a base station to a second cell under the jurisdiction of the second base station;
  • the parameter modification negotiation failure message carries the handover information of the current second cell to the first cell in the handover parameter modification negotiation failure message.
  • the method further includes: after the second base station receives the handover parameter modification negotiation request, when the second base station accepts the handover parameter configuration of the first cell to the second cell in the handover parameter modification negotiation request, The first base station returns a handover parameter modification negotiation response message.
  • the handover parameter modification negotiation response message carries the handover information of the current second cell to the first cell, and the handover information of the current second cell to the first cell is any one of the following:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the newly modified second cell to first cell handover parameter configuration and handover parameter modifiable range are the newly modified second cell to first cell handover parameter configuration and handover parameter modifiable range.
  • the method further includes: when the first base station receives the handover parameter modification negotiation response message, updating the first locally saved first configuration according to the handover parameter configuration of the first cell to the second cell in the handover parameter modification negotiation request The handover parameter configuration of the cell to the second cell, and the handover information of the current second cell to the first cell in the handover parameter modification negotiation response message is saved.
  • the handover information of the current second cell to the first cell carried in the handover parameter modification negotiation failure message is any one of the following:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the method further includes: when the first base station receives the handover parameter modification negotiation failure message, modifying the current handover information of the second cell to the first cell in the negotiation failure message according to the optimization requirement of the base station and the handover parameter, Whether to re-initiate the handover parameter modification negotiation process.
  • the handover parameter modification negotiation request, the handover parameter modification negotiation response message, and the handover parameter modification negotiation failure message are an XI interface message or an S1 interface message.
  • the first base station sends the handover parameter modification negotiation request to the second base station by using the mobility management entity, and the second base station sends the handover parameter modification negotiation response message to the first base station by using the mobility management entity, or the handover parameter modification negotiation fails. Message.
  • the invention also discloses a base station for transmitting cell handover information, comprising a receiving module, a sending module and a processing module, wherein:
  • the receiving module is configured to: receive a handover parameter modification negotiation request sent by the peer base station, and send the handover parameter modification negotiation request to the processing module;
  • the processing module is configured to: receive the handover parameter modification negotiation request, and if the handover parameter configuration of the second cell managed by the opposite base station in the handover parameter modification negotiation request to the second cell under the control of the local base station is rejected, Transmitting, by the sending module, a handover parameter modification negotiation failure message carrying the handover information of the current second cell to the first cell;
  • the sending module is configured to: receive the handover parameter modification negotiation failure message, and send the handover parameter modification negotiation failure message to the opposite base station.
  • the processing module is further configured to: if the handover parameter configuration of the first cell to the second cell in the handover parameter modification negotiation request is accepted, send a handover parameter modification negotiation response message to the sending module ;
  • the sending module is further configured to: receive the handover parameter modification negotiation response message, and send the handover parameter modification negotiation response message to the opposite base station.
  • the processing module is configured to: carry the handover information of the current second cell to the first cell in the handover parameter modification negotiation response message, where the handover information of the current second cell to the first cell is Any one:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the newly modified handover parameter configuration of the second cell to the first cell The newly modified second cell to first cell handover parameter configuration and handover parameter modifiable range.
  • the processing module is configured to: the switching information of the current second cell to the first cell carried in the handover parameter modification negotiation failure message is any one of the following:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the processing module is further configured to: update a handover parameter of the first cell that is controlled by the second cell to the peer cell, and carry the configuration of the handover parameter of the second cell to the first cell And the handover parameter modification negotiation request is sent to the sending module, and the handover parameter modification negotiation failure message and the handover parameter modification negotiation response message sent by the sending module are received, and the first one of the handover parameter modification negotiation failure message is saved. Handover information of the cell to the second cell;
  • the sending module is further configured to: receive the handover parameter modification negotiation request, and send the handover parameter modification negotiation request to the opposite base station;
  • the receiving module is further configured to: receive a handover parameter modification negotiation failure message and a handover parameter modification negotiation response message returned by the opposite base station, and send the handover parameter modification negotiation failure message and the handover parameter modification negotiation response message to the processing Module.
  • BRIEF abstract 1 is a schematic diagram of a ping-pong handover between a UE and a Cell a in the prior art
  • FIG. 2 is a schematic structural diagram of a base station transmitting cell handover information in the embodiment
  • FIG. 3 is a flow chart of transmitting cell handover information by the base station shown in FIG. 2;
  • FIG. 4 is a flowchart of the configuration of switching parameters of the cell 1 to the cell 2 in the embodiment of the present invention.
  • FIG. 5 is a flowchart of the handover parameter modification negotiation succeeded in the embodiment, and the handover parameter configuration of the cell 1 to the cell 2 and the handover parameter configuration of the cell 2 to the cell 1 are modified;
  • FIG. 6 is a flowchart of a handover parameter modification negotiation failure in the embodiment
  • FIG. 7 is a flowchart of the configuration of the handover parameter modification of the cell 1 to the cell 2 by configuring the transmission message to be successfully configured in the embodiment;
  • FIG. 8 is a flow chart showing the configuration of the handover parameter modification by configuring the transmission message and modifying the handover parameter configuration of the cell 1 to the cell 2 and the handover parameter configuration of the cell 2 to the cell 1 in the embodiment;
  • FIG. 9 is a flow chart of the failure of the negotiation of the modification of the handover parameter by configuring the transmission message in the embodiment.
  • the main idea of the present invention is that when the cell needs to update the handover parameter, it performs handover parameter negotiation with the neighboring cell, and interacts with the cell handover information of both parties (such as the handover parameter configuration and the range of the switchable parameter modification) in the negotiation process, thereby optimizing In the process of negotiation, the appropriate handover parameter settings are obtained.
  • the process of the handover parameter modification negotiation is implemented by the message interaction between the base stations.
  • the X2 interface message may be used to interact; if there is no X2 interface between the base stations, Then you can interact through the S1 interface message.
  • the message of the handover parameter modification negotiation process may be an independent message of the X2 interface, which is a handover parameter modification negotiation request message, a handover parameter modification negotiation response message, and a handover parameter modification negotiation failure message.
  • the message of the handover parameter modification negotiation process may also be an independent message, which is a handover parameter modification negotiation request message, a handover parameter modification negotiation response message, and a handover parameter modification negotiation failure message.
  • the contents of the three messages may also be transmitted by the base station configuration transmission message eNB CONFIGURATION TRANSFER and the mobility management entity configuration transmission message MME CONFIGURATION TRANSFER.
  • a base station 20 for transmitting cell handover information includes a receiving module 21, a transmitting module 22, and a processing module 23. The functions of each module are described below.
  • the receiving module 21 is configured to receive a handover parameter modification negotiation request, a handover parameter modification negotiation failure message, and a handover parameter modification negotiation response message sent by the opposite base station, and modify the received handover parameter modification negotiation request, the handover parameter modification negotiation failure message, and The handover parameter modification negotiation response message is sent to the processing module 23;
  • the processing module 23 is configured to receive the handover parameter modification negotiation request, and if the handover parameter configuration of the cell 1 under the jurisdiction of the base station under the handover of the handover modification request is rejected, the current cell 2 is carried
  • the handover parameter modification negotiation failure message of the handover information of the cell 1 is sent to the sending module, and if the handover parameter configuration of the cell 1 to the cell 2 in the handover parameter modification negotiation request is accepted, the handover parameter modification negotiation response message is sent to the sending module 22;
  • the processing module 23 is further configured to update the handover parameter configuration of the cell 2 to the cell 1, and send a handover parameter modification negotiation request carrying the modified handover parameter configuration of the cell 2 to the cell 1 to the sending module 22, and for receiving the handover.
  • the parameter modification negotiation failure message and the handover parameter modification negotiation response message, and the current cell 1 to cell 2 handover information in the handover parameter modification negotiation failure message are saved.
  • the switching information of the current cell 2 to the cell 1 carried by the processing module 23 in the handover parameter modification negotiation failure message is any one of the following:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the processing module 23 may also carry the handover information of the current cell 2 to the cell 1 in the handover parameter modification negotiation response message, and the handover information of the current cell 2 to the cell 1 is any one of the following:
  • the unmodified second cell to the first cell has a handover parameter configuration and a range in which the handover parameter can be modified;
  • the newly modified second cell to first cell handover parameter configuration and handover parameter modifiable range are the newly modified second cell to first cell handover parameter configuration and handover parameter modifiable range.
  • the sending module 22 is configured to receive the handover parameter modification negotiation failure message, the handover parameter modification negotiation response message, and the handover parameter modification negotiation request sent by the processing module 23, and modify the received handover parameter modification negotiation failure message and the handover parameter modification negotiation response message. And the handover parameter modification negotiation request is separately sent to the opposite base station.
  • the following describes the process of transmitting cell handover information by the base station in combination with an example.
  • the cell 1 and the cell 2 are adjacent cells, the cell 1 belongs to the base station 1, and the cell 2 belongs to the base station 2.
  • the base station 1 initiates a handover parameter modification negotiation process to the base station 2, as shown in FIG. 3, including the following steps:
  • Step 301 The base station 1 sends a handover parameter modification negotiation request message to the base station 2, where the message carries the new handover parameter configuration of the cell 1 to the cell 2 (that is, the preset handover parameter configuration of the cell 1 to the cell 2);
  • the modification negotiation procedure of the handover parameter of the cell 1 to the cell 2 under the jurisdiction of the base station 1 may be triggered by a certain algorithm, such as performing load balancing optimization or Modification of handover parameters caused by mobility optimization, etc.
  • Step 302 The base station 2 receives the handover parameter modification negotiation request message, reads the configuration of the handover parameter of the new cell 1 to the cell 2, and determines whether the handover parameter configuration of the new cell 1 to the cell 2 can be accepted. If yes, Go to step 303 ( a ), otherwise go to step 303 ( b ) ; In this step, the base station 2 determines whether the handover parameter configuration of the new cell 1 to the cell 2 can be accepted according to the prior art, wherein the prior art determines whether to accept the new cell 1 to cell 2 handover parameter configuration rule, the cell 1 to cell 2 handover parameter configuration and cell 2 to cell 1 handover parameter configuration, there is a certain margin between the two geographically generated handover boundaries, that is, a certain constraint must be met between the two sets of handover parameters Relationship, the constraint relationship can be specified by Operations Administration And Maintenance (OAM), or agreed by both parties.
  • OAM Operations Administration And Maintenance
  • the base station 2 may further carry the handover information of the current cell 2 to the cell 1 in the returned handover parameter modification negotiation response (may be used as a reference for the base station 1 to modify the handover parameter configuration of the cell 1 to the cell 2 next time), or
  • the handover information of any cell 2 to cell 1 is carried, where the handover information of the current cell 2 to the cell 1 is any one of the following:
  • Unmodified cell 2 to cell 1 handover parameter configuration and handover parameter modifiable range new cell 2 to cell 1 handover parameter configuration (base station 2 accepts new cell 1 to cell 2 handover parameter configuration, It is also possible to modify the handover parameter configuration of the cell 2 to the cell 1, and the modified handover parameter configuration of the cell 2 to the cell 1 is the handover parameter configuration of the new cell 2 to the cell 1);
  • the new cell 2 to cell 1 handover parameter configuration and handover parameters can be modified.
  • the handover information of the current cell 2 to the cell 1 carried by the base station 2 in the handover parameter modification negotiation failure message may be an unmodified cell 2 to cell 1 handover parameter configuration, or an unmodified cell 2 to The handover parameter configuration of the cell 1 and the range in which the handover parameters can be modified may be modified by the OAM configuration or other optimization scenarios.
  • the handover information of the current cell 2 to the cell 1 carried in the handover parameter modification negotiation failure message may further include a waiting time for the handover parameter modification negotiation re-initiation.
  • the base station 1 when the handover parameter modification negotiation response message carries the handover parameter configuration of the cell 2 to the cell 1, the base station 1 also stores the handover parameter configuration of the cell 2 to the cell 1;
  • the base station 1 modifies the unmodified cell in the negotiation failure message according to the optimization requirement of the base station and the handover parameter. 2 to the handover parameter configuration of the cell 1 and the range in which the handover parameter can be modified, and decide whether to re-initiate the handover parameter modification negotiation process.
  • the handover parameter modification negotiation failure message also carries the handover parameter modification negotiation re-initiation waiting time
  • the base station 1 must initiate the next cell 1 to cell 2 handover after reaching at least the waiting time. Parameter modification negotiation process.
  • the handover parameter modification negotiation request message, the handover parameter modification negotiation response message, and the handover parameter modification negotiation failure message in the handover parameter modification negotiation process may be an independent message of the X2 interface, or an S1 interface independent message, or
  • the base station configures the transport message eNB CONFIGURATION TRANSFER and the mobility management entity configuration transport message MME CONFIGURATION TRANSFER to transmit the contents of these three messages.
  • Step 401 The base station 1 decides to modify the handover parameter configuration of the cell 2 to the cell 2 under the jurisdiction of the base station 2 according to the optimization requirement of the handover robustness or the optimization requirement of the load balancing (that is, the handover parameter of the cell 2 to the cell 2 under the cell 2 needs to be updated) Configuration), the base station 1 generates a new set of handover parameter configurations, that is, a new handover parameter configuration of the cell 1 to the cell 2;
  • Step 402 The base station 1 initiates cutting by sending a handover parameter modification negotiation request message to the base station 2.
  • the parameter modification negotiation process is performed, and the handover parameter modification negotiation request message carries the new handover parameter configuration of the cell 1 to the cell 2 (that is, the preset handover parameter configuration of the cell 1 to the cell 2);
  • Step 403 When receiving the handover parameter modification negotiation request message, the base station 2 determines, according to a certain rule, that the handover parameter configuration of the new cell 1 to the cell 2 that the base station 1 requests to modify is accepted, and the handover parameter configuration of the cell 2 to the cell 1 is not used. After the modification, the base station 1 returns a handover parameter modification negotiation response message, where the handover parameter modification negotiation response message carries the unmodified cell 2 to cell 1 handover parameter configuration;
  • the base station 2 may carry the unmodified cell 2 to cell 1 handover parameter configuration and the handover parameter modifiable range in the handover parameter modification negotiation response message.
  • Step 404 The base station 1 receives the handover parameter modification negotiation response message, updates the locally saved handover parameter configuration of the cell 1 to the cell 2, and uses the new cell 1 to cell 2 handover parameter configuration (ie, the updated cell 1 to cell 2) The handover parameter configuration), and save the information of the handover parameter configuration of the cell 2 to the cell 1 in the handover parameter modification negotiation response message.
  • the handover parameter modification negotiation response message returned by the base station 2 to the base station 1 may not carry the information of the handover parameter configuration of the cell 2 to the cell 1.
  • the handover parameter modification negotiation succeeds, and the process of configuring the handover parameter configuration of the cell 1 to the cell 2 and the handover parameter configuration of the cell 2 to the cell 1 includes the following steps: Step 501: Base station 1 according to handover robustness The optimization requirement or the optimization requirement of the load balancing decides to modify the handover parameter configuration of the cell 2 to the cell 2 under the jurisdiction of the base station 2, and the base station 1 generates a new set of handover parameter configurations;
  • Step 502 The base station 1 initiates a handover parameter modification negotiation process by sending a handover parameter modification negotiation request message to the base station 2, and carries a new handover parameter configuration of the cell 1 to the cell 2 in the handover parameter modification negotiation request message (that is, the preset cell 1) Switching parameter configuration to cell 2);
  • Step 503 The base station 2 receives the handover parameter modification negotiation request message, and according to a certain rule, determines that the new cell 1 to the cell 2 that the base station 1 requests to modify may be accepted when the handover parameter configuration of the cell 2 to the cell 1 is modified.
  • the handover parameter configuration generates a new set of handover parameter configuration of the cell 2 to the cell 1 (ie, the modified handover parameter configuration of the cell 2 to the cell 1), and gives The base station 1 returns a handover parameter modification negotiation response message, and carries a new handover parameter configuration of the cell 2 to the cell 1 in the handover parameter modification negotiation response message, and the base station 2 uses the handover parameter configuration of the new cell 2 to the cell 1;
  • the base station 2 may carry a new cell 2 to cell 1 handover parameter configuration and a handover parameter modifiable range in the handover parameter modification negotiation response message.
  • Step 504 The base station 1 receives the handover parameter modification negotiation response message, updates the locally configured handover parameter configuration of the cell 1 to the cell 2, and uses the new handover parameter configuration of the cell 1 to the cell 2, and saves the handover parameter modification negotiation response. Information about the handover parameter configuration of the new cell 2 to cell 1 in the message.
  • the base station 1 when the handover parameter modification negotiation response message carries a new cell 2 to cell 1 handover parameter configuration and a handover parameter modifiable range, the base station 1 stores the new cell 2 to cell 1 handover parameter configuration information. And switch the range of parameters that can be modified.
  • the handover parameter modification negotiation failure process includes the following steps: Step 601: The base station 1 determines to modify the handover parameters of the cell 2 to the cell 2 under the jurisdiction of the base station 2 according to the optimization requirement of the handover robustness or the optimization requirement of the load balancing. Configuration, the base station 1 generates a new set of handover parameter configurations;
  • Step 602 The base station 1 initiates a handover parameter modification negotiation process by sending a handover parameter modification negotiation request message to the base station 2, and carries a new handover parameter configuration of the cell 1 to the cell 2 in the handover parameter modification negotiation request message (that is, the preset cell 1) Switching parameter configuration to cell 2);
  • Step 603 The base station 2 receives the handover parameter modification negotiation request message, and determines that the handover parameter configuration of the new cell 1 to the cell 2 cannot be accepted according to a certain rule, and returns a handover parameter modification negotiation failure message to the base station 1, and performs the handover parameter. Modifying the negotiation failure message carries the unmodified cell 2 to cell 1 handover parameter configuration;
  • Step 604 The base station 1 receives the handover parameter modification negotiation failure message, and modifies the unmodified cell 2 to cell 1 handover parameter configuration in the negotiation failure message according to the optimization requirement of the base station and the handover parameter, and determines whether to re-initiate the handover parameter modification negotiation process. .
  • both the base station 1 and the base station 2 use the unmodified cell 1 to cell 2 Switching parameter configuration and handover parameter configuration of cell 2 to cell 1.
  • the base station 2 may carry a handover parameter configuration of the cell 2 to the cell 1 in addition to the unmodified cell 2 to cell 1 handover parameter configuration in the handover parameter modification negotiation failure message.
  • the range in which the handover parameter can be modified may be given by the OAM configuration or other optimization scenarios.
  • the base station 1 modifies the unmodified cell 2 to cell 1 handover parameter configuration in the negotiation failure message according to the optimization requirements and handover parameters of the base station. And the range in which the handover parameter can be modified, and decide whether to re-initiate the handover parameter modification negotiation process.
  • the base station 2 may also carry the handover parameter modification negotiation re-initiation waiting time in the handover parameter modification negotiation failure message. At this time, the base station 1 must initiate or exceed the waiting time before initiating the next cell. 1 to the handover parameter modification negotiation process of the cell 2.
  • the process of configuring the transmission message to perform the handover parameter modification negotiation successfully, and modifying only the handover parameter configuration of the cell 1 to the cell 2 includes the following steps:
  • Step 701 The base station 1 determines to modify the handover parameter configuration of the cell 2 to the cell 2 under the jurisdiction of the base station 2 according to the optimization requirement of the handover robustness or the optimization requirement of the load balance, and the base station 1 generates a new handover parameter configuration.
  • Step 702 The base station 1 sends a base station configuration transmission message eNB CONFIGURATION TRANSFER to the Mobility Management Entity (MME), and the MME sends a mobility management entity configuration transmission message MME CONFIGURATION TRANSFER to the base station 2 to initiate a handover parameter modification negotiation process.
  • the configuration transmission message and the mobility management entity configuration transmission message contain the handover parameter modification negotiation request content, and carry the new handover parameter configuration of the cell 1 to the cell 2 (ie, the preset handover parameter configuration of the cell 1 to the cell 2);
  • Step 703 After receiving the handover parameter modification negotiation request of the base station 1 by the MME, the base station 2 determines, according to a certain rule, that the handover parameter configuration of the new cell 1 to the cell 2 that the base station 1 requests to modify is accepted, and the cell 2 to the cell 1 The handover parameter configuration is not modified, and the base station 1 returns a handover parameter modification negotiation response, and the handover parameter modification negotiation response includes the unmodified cell 2 to cell 1 handover parameter configuration;
  • the base station 2 sends a base station configuration transmission message to the MME, and then the MME sends the base station to the base station.
  • the mobile mobility management entity configures the transmission message, and the handover parameter modification negotiation response content is included in the base station configuration transmission message and the mobility management entity configuration transmission message.
  • Step 704 The base station 1 receives the handover parameter modification negotiation response content sent by the base station 2 through the MME, updates the locally configured handover parameter configuration of the cell 1 to the cell 2, and uses the new handover parameter configuration of the cell 1 to the cell 2, and The information of the handover parameter configuration of the cell 2 to the cell 1 in the handover parameter modification negotiation response content is saved.
  • the base station 2 returns to the base station 1 information that the handover parameter modification negotiation content does not carry the handover parameter configuration of the cell 2 to the cell 1.
  • the base station 2 may carry the unmodified cell 2 to cell 1 handover parameter configuration and the handover parameter modifiable range in the handover parameter modification negotiation response message.
  • the base station 1 uses the new cell 1 to The handover parameter configuration of the cell 2, and the handover parameter configuration of the cell 2 to the cell 1 in the handover parameter modification negotiation response content and the range in which the handover parameter can be modified are saved.
  • the following describes the process of successfully changing the handover parameters by configuring the transmission message, and modifies the handover parameter configuration of the cell 1 to the cell 2 and the handover parameter configuration of the cell 2 to the cell 1 in the following steps, including the following steps:
  • Step 801 The base station 1 determines to modify the handover parameter configuration of the cell 1 to the cell 2 under the jurisdiction of the base station 2 according to the optimization requirement of the handover robustness or the optimization requirement of the load balance, and the base station 1 generates a new handover parameter configuration.
  • Step 802 The base station 1 sends a base station configuration transmission message eNB CONFIGURATION TRANSFER to the mobility management entity MME, and the MME sends a mobility management entity configuration transmission message MME CONFIGURATION TRANSFER to the base station 2 to initiate a handover parameter modification negotiation process, where the base station configures the transmission message and the mobility management entity.
  • the configuration transmission message includes a handover parameter modification negotiation request content, and carries a new handover parameter configuration of the cell 1 to the cell 2 (that is, a preset handover parameter configuration of the cell 1 to the cell 2);
  • Step 803 After receiving the handover parameter modification negotiation request of the base station 1 by the MME, the base station 2 determines, according to a certain rule, that when the handover parameter configuration of the cell 2 to the cell 1 is modified, the base station 1 may accept the new modification requested by the base station 1.
  • the handover parameter configuration of the cell 1 to the cell 2 generates one
  • the handover parameter configuration of the new cell 2 to the cell 1 is performed, and the handover parameter modification negotiation response is returned to the base station 1.
  • the handover parameter modification negotiation response includes the new handover parameter configuration of the cell 2 to the cell 1, and the base station 2 uses the new cell 2 Switching parameter configuration to cell 1;
  • the base station 2 sends a base station configuration transmission message to the MME, and then the MME sends a mobility management entity configuration transmission message to the base station 1, and the handover parameter modification negotiation response content is included in the base station configuration transmission message and the mobility management entity configuration transmission message.
  • Step 804 The base station 1 receives the handover parameter modification negotiation response sent by the base station 2 through the MME, updates the locally configured handover parameter configuration of the cell 1 to the cell 2, uses the new handover parameter configuration of the cell 1 to the cell 2, and saves The switching parameter modifies the information of the new cell 2 to cell 1 handover parameter configuration in the negotiation response.
  • the base station 2 may carry a new cell 2 to cell 1 handover parameter configuration and a handover parameter modifiable range in the handover parameter modification negotiation response message. At this time, the base station 1 saves the handover parameter modification negotiation response content. The new cell 2 to cell 1 handover parameter configuration and handover parameter modifiable range.
  • the base station 2 returns to the base station 1 information that the handover parameter modification negotiation content does not carry the handover parameter configuration of the cell 2 to the cell 1.
  • Figure 9 below shows the process of switching the parameter modification negotiation failure by configuring the transmission message, including the following steps:
  • Step 901 The base station 1 determines to modify the handover parameter configuration of the cell 2 to the cell 2 under the jurisdiction of the base station 2 according to the optimization requirement of the handover robustness or the optimization requirement of the load balance, and the base station 1 generates a new handover parameter configuration.
  • Step 902 The base station 1 sends a base station configuration transmission message eNB CONFIGURATION TRANSFER to the mobility management entity MME, and the MME sends a mobility management entity configuration transmission message MME CONFIGURATION TRANSFER to the base station 2 to initiate a handover parameter modification negotiation process, where the base station configures the transmission message and the mobility management entity.
  • eNB CONFIGURATION TRANSFER to the mobility management entity MME
  • MME sends a mobility management entity configuration transmission message MME CONFIGURATION TRANSFER to the base station 2 to initiate a handover parameter modification negotiation process, where the base station configures the transmission message and the mobility management entity.
  • the configuration transmission message includes the handover parameter modification negotiation request content, and the handover parameter modification negotiation request carries the new handover parameter configuration of the cell 1 to the cell 2 (that is, the preset handover parameter configuration of the cell 1 to the cell 2);
  • Step 903 After receiving the handover parameter modification negotiation request of the base station 1 by the MME, the base station 2 determines that the handover parameter configuration of the new cell 1 to the cell 2 cannot be accepted according to a certain rule, and returns the handover parameter modification negotiation failure content to the base station 1 And carrying the unmodified cell 2 to cell 1 handover parameter configuration in the handover parameter modification negotiation failure content;
  • the base station 2 sends a base station configuration transmission message to the MME, and then the MME sends a mobility management entity configuration transmission message to the base station 1, and the handover parameter modification negotiation failure content is included in the base station configuration transmission message and the mobility management entity configuration transmission message.
  • Step 904 The base station 1 receives the handover parameter modification negotiation failure content sent by the base station 2 through the MME, and modifies the handover parameter configuration of the cell 2 to the cell 1 that is not modified in the negotiation failure content according to the optimization requirement of the base station and the handover parameter, and determines whether Re-initiate the handover parameter modification negotiation process.
  • both the base station 1 and the base station 2 use the unmodified cell 1 to cell 2 handover parameter configuration and the cell 2 to cell 1 handover parameter configuration.
  • the base station 2 may carry a handover parameter configuration of the cell 2 to the cell 1 in addition to the unmodified cell 2 to cell 1 handover parameter configuration in the handover parameter modification negotiation failure content.
  • the range in which the handover parameter can be modified may be given by the OAM configuration or other optimization scenarios.
  • the base station 1 modifies the unmodified cell 2 to cell 1 handover parameter configuration in the negotiation failure content according to the optimization requirements and handover parameters of the base station. And the range in which the handover parameter can be modified, and decide whether to re-initiate the handover parameter modification negotiation process.
  • the base station 2 may carry the handover parameter modification negotiation re-initiation waiting time in the handover parameter modification negotiation failure content. At this time, the base station 1 must initiate or exceed the waiting time before initiating the next cell 1 The handover parameter modification negotiation process to the cell 2.
  • the technical solution of the present invention can return the handover of the opposite base station to the source base station in the handover parameter negotiation process, compared with the handover parameter modification reference value returned in the case of the failure of the handover parameter negotiation in the prior art.
  • Parameter configuration or return the switch parameter configuration and the modifiable range of the peer base station, as a reference for the next negotiation process.
  • the specific handover parameter configuration is optimized, the entire negotiation process is simplified, the waste of network resources is reduced, the performance of the network is improved, and the self-optimization function of the network is realized.
  • the technical solution of the present invention can optimize the specific handover parameter configuration, simplify the entire negotiation process, reduce the waste of network resources, improve the performance of the network, and realize the self-optimization function of the network.

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Description

一种传输小区切换信息的方法及演进基站
技术领域
本发明涉及无线蜂窝通信系统, 特别涉及一种传输小区切换信息的方法 及基站。 背景技术
长期演进(Long Term Evolution, LTE ) 网络由演进通用陆地无线接入 网络(Evolved UTRAN, E-UTRAN)、 基站( Evolved NodeB、 eNB )和演进 分组交换中心( Evolved Packet Core , EPC )组成,网络扁平化。其中 E-UTRAN 包含和 EPC通过 S1接口连接的 eNB的集合, eNB之间能通过 X2接口连接。
Sl、 X2接口是逻辑接口。 一个 EPC可以管理一个或多个 eNB, —个 eNB也 可以受控于多个 EPC , —个 eNB可以管理一个或多个小区。
自组网 ( Self Organizing Network, SON )是一种自动进行网络配置和优 化的技术。该技术的特点是自配置自优化,该技术在 LTE中的应用使得 LTE 基站 (eNB )可以根据一定的测量自动配置网络参数, 并根据网络变化进行 自动优化, 从而保持网络性能最优, 同时节约大量的人力物力。
对于 LTE系统的切换参数自优化来说, 需要根据网络的运行状况, 根据 切换相关的测量, 按照一定的算法来优化小区重选和切换相关的参数, 以提 高网络的性能。 这里的切换是指 LTE系统内部的切换和系统间的切换, 系统 间的切换是指到通用陆地无线接入网络(Universal Terrestrial Radio Access Network , UTRAN ) 或全球移动通讯系统 ( Global System For Mobile Communication, GSM )或码分多址接入 ( Code Division Multiple Access, CDMA ) 系统的切换。 同样, 对于切换参数的自优化也可用于小区间的负荷 均衡, 通过小区重选和切换参数的优化可以解决流量负荷的不均勾, 并且使 得为实现负荷均衡而进行的切换和重定向的次数最 d、, 相比静止的或没有自 优化的小区重选和切换参数来说, 还能够提高系统的容量。
目前,在修改本小区的切换参数时,需要考虑相关邻区的切换参数配置, 某些切换参数的修改会对 UE到邻区的切换行为产生很大的影响, 例如, 小 区个体偏移( Cell Individual Offset, CIO )、频率偏移( frequency specific offset ) 和迟滞( Hysteresis )参数, 能够触发 UE到特定邻接小区或所有邻接小区的 过早和过晚的切换。 在很多场景下, 一个小区的切换参数进行修改, 其相关 邻区也要响应的进行爹改。
如果一个小区的切换参数的修改, 只考虑本小区的切换参数配置而不考 虑相关邻接小区的切换参数配置, 那么就可能会产生不合适的切换参数, 从 而会导致乒乓切换。 图 1所示即为 UE在小区 (Cell ) b和 Cell a间的乒乓 切换, 由于 Cell b和 Cell a间的不合适的切换参数, UE会在小区 Cell b和 Cell a之间进行乒乓切换。 现有的切换参数协商的机制用于切换参数的修改 过程, Cell a修改 Cell a到 Cell b切换的切换参数时, Cell a所属的源基站必 须与邻接 Cell b所属基站进行协商, 如果对端基站同意, 则返回协商确认, 如果对端基站拒绝, 则带回一个切换参数修改参考值和一个合适的原因值。 源基站收到切换参数协商确认消息则将新的切换参数配置生效; 收到切换参 数协商拒绝消息, 则不使用新的切换参数。 下一次重新发起协商过程。
由上可以看出,现有方式没有提出两个基站都需要修改参数的解决方式, 并且在协商失败时对端仅返回一个切换参数修改参考值也是不够的。
发明内容
本发明所要解决的技术问题是, 提供一种传输小区切换信息的方法及基 站, 从而实现网络的自优化功能。
为了解决上述问题,本发明公开了一种传输小区切换信息的方法, 包括: 第一基站向相邻的第二基站发送切换参数修改协商请求, 所述切换参数 修改协商请求中携带预设置的第一基站所管辖的第一小区到第二基站所管辖 的第二小区的切换参数配置; 以及
所述第二基站接收所述切换参数修改协商请求, 当所述第二基站拒绝所 述切换参数修改协商请求中第一小区到第二小区的切换参数配置时, 向所述 第一基站返回切换参数修改协商失败消息, 所述切换参数修改协商失败消息 中携带当前第二小区到第一小区的切换信息。 所述方法还包括: 所述第二基站接收所述切换参数修改协商请求后, 当 所述第二基站接受所述切换参数修改协商请求中第一小区到第二小区的切换 参数配置时, 向所述第一基站返回切换参数修改协商响应消息。
其中, 所述切换参数修改协商响应消息中携带当前第二小区到第一小区 的切换信息, 所述当前第二小区到第一小区的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
新修改的第二小区到第一小区的切换参数配置;
新修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围。
所述方法还包括: 当所述第一基站收到所述切换参数修改协商响应消息 时, 根据所述切换参数修改协商请求中第一小区到第二小区的切换参数配置 更新本地保存的第一小区到第二小区的切换参数配置, 并保存所述切换参数 修改协商响应消息中当前第二小区到第一小区的切换信息。
所述切换参数修改协商失败消息中所携带的当前第二小区到第一小区的 切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
未修改的第二小区到第一小区的切换参数配置和切换参数修改协商重新 发起的等待时间;
未修改的第二小区到第一小区的切换参数配置、 切换参数可修改的范围 和切换参数修改协商重新发起的等待时间。
所述方法还包括:所述第一基站收到所述切换参数修改协商失败消息时, 根据本基站的优化需求和切换参数修改协商失败消息中当前第二小区到第一 小区的切换信息, 决定是否重新发起切换参数修改协商过程。 所述切换参数修改协商请求、 切换参数修改协商响应消息和切换参数修 改协商失败消息为 XI接口消息或者 S1接口消息。
所述第一基站通过移动管理实体向第二基站发送所述切换参数修改协商 请求, 所述第二基站通过移动管理实体向第一基站发送所述切换参数修改协 商响应消息或者切换参数修改协商失败消息。
本发明还公开了一种传输小区切换信息的基站, 包括接收模块、 发送模 块和处理模块, 其中:
所述接收模块设置为: 接收对端基站发送的切换参数修改协商请求, 并 将所述切换参数修改协商请求发送给所述处理模块;
所述处理模块设置为: 接收所述切换参数修改协商请求, 若拒绝所述切 换参数修改协商请求中对端基站所管辖的第一小区到本基站所管辖的第二小 区的切换参数配置, 则将携带有当前所述第二小区到所述第一小区的切换信 息的切换参数修改协商失败消息发送给所述发送模块;
所述发送模块设置为: 接收所述切换参数修改协商失败消息, 并将所述 切换参数修改协商失败消息发送给所述对端基站。
上述基站中, 所述处理模块还设置为: 若接受所述切换参数修改协商请 求中所述第一小区到第二小区的切换参数配置, 则将切换参数修改协商响应 消息发送给所述发送模块;
所述发送模块还设置为: 接收所述切换参数修改协商响应消息, 并将所 述切换参数修改协商响应消息发送给对端基站。
其中, 所述处理模块是设置为: 在所述切换参数修改协商响应消息中携 带当前所述第二小区到所述第一小区的切换信息, 当前第二小区到第一小区 的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
新修改的第二小区到第一小区的切换参数配置; 新修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围。
所述处理模块是设置为: 在所述切换参数修改协商失败消息中携带的当 前所述第二小区到所述第一小区的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
未修改的第二小区到第一小区的切换参数配置和切换参数修改协商重新 发起的等待时间;
未修改的第二小区到第一小区的切换参数配置、 切换参数可修改的范围 和切换参数修改协商重新发起的等待时间。
所述处理模块还设置为: 更新本基站所管辖的第二小区到对端基站所管 辖的第一小区的切换参数, 并将携带所述第二小区到所述第一小区的切换参 数配置的切换参数修改协商请求发送给所述发送模块, 以及接收所述发送模 块发送的切换参数修改协商失败消息和切换参数修改协商响应消息, 并保存 所述切换参数修改协商失败消息中当前所述第一小区到所述第二小区的切换 信息;
所述发送模块还设置为: 接收所述切换参数修改协商请求, 并将所述切 换参数修改协商请求发送给对端基站;
所述接收模块还设置为: 接收对端基站返回的切换参数修改协商失败消 息和切换参数修改协商响应消息, 并将所述切换参数修改协商失败消息和切 换参数修改协商响应消息发送给所述处理模块。
釆用本发明技术方案, 可以对具体的切换参数配置进行优化, 简化整个 协商的过程, 减少网络资源的浪费, 提高网络的性能, 从而实现网络的自优 化功能。 附图概述 图 1为现有技术中 UE在 Cell b和 Cell a间乒乓切换的示意图; 图 2为本实施例中传输小区切换信息的基站结构示意图;
图 3为图 2所示基站传输小区切换信息的流程图;
图 4为本实施例中切换参数修改协商成功且只修改小区 1到小区 2的切 换参数配置的流程图;
图 5为本实施例中切换参数修改协商成功并修改了小区 1到小区 2的切 换参数配置和小区 2到小区 1的切换参数配置的流程图;
图 6为本实施例中切换参数修改协商失败的流程图;
图 7为本实施例中通过配置传输消息进行切换参数修改协商成功且只修 改小区 1到小区 2的切换参数配置的流程图;
图 8为本实施例中通过配置传输消息进行切换参数修改协商成功并修改 了小区 1到小区 2的切换参数配置和小区 2到小区 1的切换参数配置的流程 图;
图 9为本实施例中通过配置传输消息进行切换参数修改协商失败的流程 图。 本发明的较佳实施方式
本发明的主要构思是, 本小区需要更新切换参数时, 和邻接小区进行切 换参数协商, 并在协商过程中交互双方的小区切换信息 (如切换参数配置以 及切换参数可修改的范围) , 从而优化了协商的过程, 得到了合适的切换参 数西己置 ( handover parameter settings ) 。
具体地, 考虑到切换参数修改协商的过程是通过基站间的消息交互来实 现的, 当基站间存在 X2接口的情况下, 可以通过 X2接口消息来交互; 基站 间不存在 X2接口的情况下, 则可以通过 S1接口消息来交互。 切换参数修改 协商过程的消息可以是 X2接口的独立消息, 分别为切换参数修改协商请求 消息、 切换参数修改协商响应消息和切换参数修改协商失败消息。 在 S1 接 口, 切换参数修改协商过程的消息也可以是独立消息, 分别为切换参数修改 协商请求消息、 切换参数修改协商响应消息和切换参数修改协商失败消息。 也可以通过基站配置传输消息 eNB CONFIGURATION TRANSFER和移动管 理实体配置传输消息 MME CONFIGURATION TRANSFER来传输这三条消 息的内容。
下面结合附图及具体实施例对本发明技术方案作进一步详细说明。
一种传输小区切换信息的基站 20 , 如图 2所示, 包括接收模块 21、发送 模块 22和处理模块 23。 下面介绍各模块的功能。
接收模块 21 , 用于接收对端基站发送的切换参数修改协商请求、 切换参 数修改协商失败消息和切换参数修改协商响应消息, 并将所接收的切换参数 修改协商请求、 切换参数修改协商失败消息和切换参数修改协商响应消息分 别发送给处理模块 23 ;
处理模块 23 , 用于接收切换参数修改协商请求, 若拒绝切换参数修改协 商请求中对端基站所管辖的小区 1到本基站所管辖的小区 2的切换参数配置, 则将携带有当前小区 2到小区 1的切换信息的切换参数修改协商失败消息发 送给发送模块, 若接受切换参数修改协商请求中小区 1到小区 2的切换参数 配置, 则将切换参数修改协商响应消息发送给发送模块 22;
处理模块 23 , 还用于更新小区 2到小区 1的切换参数配置, 并将携带有 修改的小区 2到小区 1的切换参数配置的切换参数修改协商请求发送给发送 模块 22, 以及用于接收切换参数修改协商失败消息和切换参数修改协商响应 消息,并保存切换参数修改协商失败消息中当前小区 1到小区 2的切换信息。
其中, 处理模块 23 在切换参数修改协商失败消息中携带的当前小区 2 到小区 1的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
未修改的第二小区到第一小区的切换参数配置和切换参数修改协商重新 发起的等待时间;
未修改的第二小区到第一小区的切换参数配置、 切换参数可修改的范围 和切换参数修改协商重新发起的等待时间。
在其他实施例中,处理模块 23还可以在切换参数修改协商响应消息中携 带当前小区 2到小区 1的切换信息, 当前小区 2到小区 1的切换信息为以下 任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
新修改的第二小区到第一小区的切换参数配置;
新修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围。
发送模块 22,用于接收处理模块 23发送的切换参数修改协商失败消息、 切换参数修改协商响应消息和切换参数修改协商请求, 并将所接收的切换参 数修改协商失败消息、 切换参数修改协商响应消息和切换参数修改协商请求 分别发送给对端基站。
下面结合实例介绍上述基站传输小区切换信息的过程。
例如, 小区 1和小区 2是邻接小区, 小区 1属于基站 1 , 小区 2属于基 站 2, 在 LTE系统中, 基站 1向基站 2发起切换参数修改协商过程, 如图 3 所示, 包括以下步骤:
步骤 301 : 基站 1向基站 2发送切换参数修改协商请求消息, 该消息中 携带新的小区 1到小区 2的切换参数配置 (即预设置的小区 1到小区 2的切 换参数配置 ) ;
该步骤中, 基站 1所管辖的小区 1到基站 2所管辖小区 2的切换参数的 修改协商过程(即基站 1发起切换参数修改协商请求消息) , 可由一定的算 法触发, 比如进行负荷均衡优化或者移动性优化导致的切换参数修改等。
步骤 302: 基站 2接收上述切换参数修改协商请求消息, 读取其中新的 小区 1到小区 2的切换参数配置, 并判断是否可以接受新的小区 1到小区 2 的切换参数配置, 如果是, 则进入步骤 303 ( a ) , 否则进入步骤 303 ( b ) ; 该步骤中, 基站 2根据现有技术判断是否可以接受新的小区 1到小区 2 的切换参数配置, 其中, 现有技术判断是否接受新的小区 1到小区 2的切换 参数配置的规则指, 小区 1到小区 2的切换参数配置和小区 2到小区 1的切 换参数配置, 在地理上产生的两条切换的边界之间需要有一定的余量, 即两 套切换参数之间要满足一定的制约关系, 该制约关系可以是操作、 管理和维 护(Operations Administration And Maintenance, OAM )规定, 或者双方约定 的。
步骤 303 ( a ): 基站 2向基站 1返回切换参数修改协商响应, 以表示协 商成功, 进入步骤 304 ( a ) ;
该步骤中, 基站 2在返回的切换参数修改协商响应中还可以携带当前小 区 2到小区 1的切换信息 (可以作为基站 1下次修改小区 1到小区 2的切换 参数配置的参考) , 或者不携带任何小区 2到小区 1的切换信息, 其中, 当 前小区 2到小区 1的切换信息为以下任一种:
未修改的小区 2到小区 1的切换参数配置;
未修改的小区 2到小区 1的切换参数配置和切换参数可修改的范围; 新的小区 2到小区 1的切换参数配置 (基站 2在接受新的小区 1到小区 2的切换参数配置的同时, 还可能修改小区 2到小区 1的切换参数配置, 所 修改的小区 2到小区 1的切换参数配置即为新的小区 2到小区 1的切换参数 配置);
新的小区 2到小区 1的切换参数配置和切换参数可修改的范围。
步骤 303 ( b ) : 基站 2向基站 1返回切换参数修改协商失败消息, 该消 息中携带当前小区 2到小区 1的切换信息, 进入步骤 304 ( b ) ;
该步骤中, 基站 2在切换参数修改协商失败消息中所携带的当前小区 2 到小区 1的切换信息, 可以是未修改的小区 2到小区 1的切换参数配置, 或 者是未修改的小区 2到小区 1的切换参数配置和切换参数可修改的范围, 切 换参数可修改的范围可以是由 OAM配置或者其它优化场景给出的。 还有一 些实施例中, 切换参数修改协商失败消息中所携带的当前小区 2到小区 1的 切换信息还可以包括切换参数修改协商重新发起的等待时间。 步骤 304 ( a ) : 基站 1接收切换参数修改协商响应消息, 更新本地所保 存的小区 1到小区 2的切换参数配置, 并使用新的小区 1到小区 2的切换参 数配置 (即更新的小区 1到小区 2的切换参数配置 ) , 结束本流程;
该步骤中, 当切换参数修改协商响应消息中携带有小区 2到小区 1的切 换参数配置时, 基站 1还保存小区 2到小区 1的切换参数配置;
步骤 304 ( b ) : 基站 1接收切换参数修改协商失败消息, 可以根据本基 站的优化需求和切换参数修改协商失败消息中未修改的小区 2到小区 1的切 换参数配置, 决定是否重新发起切换参数修改协商过程;
在其他实施例中, 当切换参数修改协商失败消息中还携带小区 2到小区 1的切换参数可修改的范围时, 基站 1根据本基站的优化需求、 切换参数修 改协商失败消息中未修改的小区 2到小区 1的切换参数配置和该切换参数可 修改的范围,决定是否重新发起切换参数修改协商过程。还有一些实施例中, 当切换参数修改协商失败消息中还携带切换参数修改协商重新发起的等待时 间时, 基站 1必须在到达至少超过该等待时间后才能发起下一次小区 1到小 区 2的切换参数修改协商过程。
在上述流程中, 切换参数修改协商过程的中的切换参数修改协商请求消 息、 切换参数修改协商响应消息和切换参数修改协商失败消息可以是 X2接 口的独立消息, 或者是 S1接口独立消息, 或者通过基站配置传输消息 eNB CONFIGURATION TRANSFER 和移动管理实体配置传输消息 MME CONFIGURATION TRANSFER来传输这三条消息的内容。
下面结合图 4, 介绍切换参数修改协商成功, 且只修改小区 1到小区 2 的切换参数配置的过程, 包括以下步骤:
步骤 401 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置 (即需要更新小区 1 到基站 2所管辖小区 2的切换参数配置) , 基站 1生成一套新的切换参数配 置, 即新的小区 1到小区 2的切换参数配置;
步骤 402: 基站 1通过向基站 2发送切换参数修改协商请求消息发起切 换参数修改协商过程, 在切换参数修改协商请求消息中携带新的小区 1到小 区 2的切换参数配置 (即预设置的小区 1到小区 2的切换参数配置) ;
步骤 403: 基站 2收到切换参数修改协商请求消息时, 根据一定的规则 判断可以接受基站 1请求修改的新的小区 1到小区 2的切换参数配置, 且小 区 2到小区 1的切换参数配置不用修改, 则给基站 1返回切换参数修改协商 响应消息, 切换参数修改协商响应消息中携带有未修改的小区 2到小区 1的 切换参数配置;
在其他实施例中, 基站 2在切换参数修改协商响应消息中可以携带未修 改的小区 2到小区 1的切换参数配置和切换参数可修改的范围。
步骤 404: 基站 1收到切换参数修改协商响应消息, 更新本地保存的小 区 1到小区 2的切换参数配置, 并使用新的小区 1到小区 2的切换参数配置 (即更新的小区 1到小区 2的切换参数配置) , 并保存切换参数修改协商响 应消息中小区 2到小区 1的切换参数配置的信息。
在其他实施例中, 基站 2给基站 1返回的切换参数修改协商响应消息中 也可以不携带小区 2到小区 1的切换参数配置的信息。
下面结合图 5介绍, 切换参数修改协商成功, 同时修改了小区 1到小区 2的切换参数配置和小区 2到小区 1的切换参数配置的过程, 包括以下步骤: 步骤 501 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置, 基站 1生成一套新 的切换参数配置;
步骤 502: 基站 1通过向基站 2发送切换参数修改协商请求消息发起切 换参数修改协商过程, 在切换参数修改协商请求消息中携带新的小区 1到小 区 2的切换参数配置 (即预设置的小区 1到小区 2的切换参数配置) ;
步骤 503: 基站 2收到切换参数修改协商请求消息, 根据一定的规则, 判断在修改了小区 2到小区 1的切换参数配置的情况下, 可以接受基站 1请 求修改的新的小区 1到小区 2的切换参数配置, 则生成一套新的小区 2到小 区 1的切换参数配置 (即修改了的小区 2到小区 1的切换参数配置) , 并给 基站 1返回切换参数修改协商响应消息, 在切换参数修改协商响应消息中携 带新的小区 2到小区 1的切换参数配置, 同时, 基站 2使用新的小区 2到小 区 1的切换参数配置;
在其他实施例中, 基站 2在切换参数修改协商响应消息中可以携带新的 小区 2到小区 1的切换参数配置和切换参数可修改的范围。
步骤 504: 基站 1收到切换参数修改协商响应消息, 更新本地所保存的 小区 1到小区 2的切换参数配置, 并使用新的小区 1到小区 2的切换参数配 置, 并保存切换参数修改协商响应消息中新的小区 2到小区 1的切换参数配 置的信息。
在其他实施例中, 切换参数修改协商响应消息中携带新的小区 2到小区 1的切换参数配置和切换参数可修改的范围时, 基站 1保存新的小区 2到小 区 1的切换参数配置的信息和切换参数可修改的范围。
下面结合图 6介绍, 切换参数修改协商失败过程, 包括以下步骤: 步骤 601 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置, 基站 1生成一套新 的切换参数配置;
步骤 602: 基站 1通过向基站 2发送切换参数修改协商请求消息发起切 换参数修改协商过程, 在切换参数修改协商请求消息中携带新的小区 1到小 区 2的切换参数配置 (即预设置的小区 1到小区 2的切换参数配置) ;
步骤 603: 基站 2收到切换参数修改协商请求消息, 根据一定的规则, 判断不能接受新的小区 1到小区 2的切换参数配置, 则给基站 1返回切换参 数修改协商失败消息, 并在切换参数修改协商失败消息中携带未修改的小区 2到小区 1的切换参数配置;
步骤 604: 基站 1收到切换参数修改协商失败消息, 根据本基站的优化 需求和切换参数修改协商失败消息中未修改的小区 2到小区 1的切换参数配 置, 决定是否重新发起切换参数修改协商过程。
上述协商过程结束后, 基站 1和基站 2都使用未修改的小区 1到小区 2 的切换参数配置和小区 2到小区 1的切换参数配置。
在其他实施例中, 基站 2在切换参数修改协商失败消息中除了携带未修 改的小区 2到小区 1的切换参数配置外, 还可以携带一个小区 2到小区 1的 切换参数可修改的范围, 这个切换参数可修改的范围可以是由 OAM配置或 者其它优化场景给出的, 此时, 基站 1根据本基站的优化需求和切换参数修 改协商失败消息中未修改的小区 2到小区 1的切换参数配置和该切换参数可 修改的范围, 决定是否重新发起切换参数修改协商过程。
还有一些实施例中, 基站 2在切换参数修改协商失败消息中还可以携带 切换参数修改协商重新发起的等待时间, 此时, 基站 1必须在到达或者超过 这个等待时间后,才能发起下一次小区 1到小区 2的切换参数修改协商过程。
下面结合图 7介绍, 通过配置传输消息进行切换参数修改协商成功, 且 只修改小区 1到小区 2的切换参数配置的过程, 包括如下步骤:
步骤 701 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置, 基站 1生成一套新 的切换参数配置;
步骤 702: 基站 1向移动管理实体(Mobility Management Entity, MME ) 发送基站配置传输消息 eNB CONFIGURATION TRANSFER, MME再向基 站 2发送移动管理实体配置传输消息 MME CONFIGURATION TRANSFER 来发起切换参数修改协商过程, 在基站配置传输消息和移动管理实体配置传 输消息中含有切换参数修改协商请求内容, 并携带新的小区 1到小区 2的切 换参数配置 (即预设置的小区 1到小区 2的切换参数配置) ;
步骤 703: 基站 2通过 MME收到基站 1的切换参数修改协商请求后, 根据一定的规则, 判断可以接受基站 1请求修改的新的小区 1到小区 2的切 换参数配置, 且小区 2到小区 1的切换参数配置不用修改, 则给基站 1返回 切换参数修改协商响应, 在切换参数修改协商响应中含有未修改的小区 2到 小区 1的切换参数配置;
该步骤中, 基站 2向 MME发送基站配置传输消息, 然后 MME向基站 1 发送移动管理实体配置传输消息, 在基站配置传输消息和移动管理实体配 置传输消息中含有切换参数修改协商响应内容。
步骤 704: 基站 1收到基站 2通过 MME发来的切换参数修改协商响应 内容, 更新本地所保存的小区 1到小区 2的切换参数配置, 使用新的小区 1 到小区 2的切换参数配置, 并保存切换参数修改协商响应内容中小区 2到小 区 1的切换参数配置的信息。
在其他实施例中, 基站 2给基站 1返回切换参数修改协商响应内容中可 以不携带小区 2到小区 1的切换参数配置的信息。
还有一些实施例中, 基站 2在切换参数修改协商响应消息中可以携带未 修改的小区 2到小区 1的切换参数配置和切换参数可修改的范围, 此时, 基 站 1使用新的小区 1到小区 2的切换参数配置, 并保存切换参数修改协商响 应内容中小区 2到小区 1的切换参数配置和切换参数可修改的范围。
下面结合图 8, 介绍通过配置传输消息进行切换参数修改协商成功, 同 时修改了小区 1到小区 2的切换参数配置和小区 2到小区 1的切换参数配置 的过程, 包括以下步骤:
步骤 801 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置, 基站 1生成一套新 的切换参数配置;
步骤 802: 基站 1 向移动管理实体 MME发送基站配置传输消息 eNB CONFIGURATION TRANSFER, MME再向基站 2发送移动管理实体配置传 输消息 MME CONFIGURATION TRANSFER发起切换参数修改协商过程, 在基站配置传输消息和移动管理实体配置传输消息中含有在切换参数修改协 商请求内容, 并携带新的小区 1到小区 2的切换参数配置 (即预设置的小区 1到小区 2的切换参数配置 ) ;
步骤 803: 基站 2通过 MME收到基站 1的切换参数修改协商请求后, 根据一定的规则, 判断在修改了小区 2到小区 1的切换参数配置的情况下, 可以接受基站 1请求修改的新的小区 1到小区 2的切换参数配置, 则生成一 套新的小区 2到小区 1的切换参数配置, 给基站 1返回切换参数修改协商响 应, 在切换参数修改协商响应中含有新的小区 2到小区 1的切换参数配置, 基站 2使用新的小区 2到小区 1的切换参数配置;
该步骤中, 基站 2向 MME发送基站配置传输消息, 然后 MME向基站 1 发送移动管理实体配置传输消息, 在基站配置传输消息和移动管理实体配 置传输消息中含有切换参数修改协商响应内容。
步骤 804: 基站 1收到基站 2通过 MME发来的切换参数修改协商响应, 更新本地所保存的小区 1到小区 2的切换参数配置, 使用新的小区 1到小区 2的切换参数配置, 并保存切换参数修改协商响应中新的小区 2到小区 1的 切换参数配置的信息。
在其他实施例中, 基站 2在切换参数修改协商响应消息中可以携带新的 小区 2到小区 1的切换参数配置和切换参数可修改的范围, 此时, 基站 1保 存切换参数修改协商响应内容中新的小区 2到小区 1的切换参数配置和切换 参数可修改的范围。
在其他实施例中, 基站 2给基站 1返回切换参数修改协商响应内容中可 以不携带小区 2到小区 1的切换参数配置的信息。
下面图 9 , 介绍通过配置传输消息进行切换参数修改协商失败的过程, 包括如下步骤:
步骤 901 :基站 1根据切换健壮性的优化需求或者负荷均衡的优化需求, 决定修改小区 1到基站 2所管辖小区 2的切换参数配置, 基站 1生成一套新 的切换参数配置;
步骤 902: 基站 1 向移动管理实体 MME发送基站配置传输消息 eNB CONFIGURATION TRANSFER, MME再向基站 2发送移动管理实体配置传 输消息 MME CONFIGURATION TRANSFER发起切换参数修改协商过程, 在基站配置传输消息和移动管理实体配置传输消息中含有在切换参数修改协 商请求内容, 在切换参数修改协商请求中携带新的小区 1到小区 2的切换参 数配置 (即预设置的小区 1到小区 2的切换参数配置) ; 步骤 903: 基站 2通过 MME收到基站 1的切换参数修改协商请求后, 根据一定的规则, 判断不能接受新的小区 1到小区 2的切换参数配置, 则给 基站 1返回切换参数修改协商失败内容, 并在切换参数修改协商失败内容中 携带未修改的小区 2到小区 1的切换参数配置;
该步骤中, 基站 2向 MME发送基站配置传输消息, 然后 MME向基站 1 发送移动管理实体配置传输消息, 在基站配置传输消息和移动管理实体配 置传输消息中含有切换参数修改协商失败内容。
步骤 904: 基站 1收到基站 2通过 MME发来的切换参数修改协商失败 内容, 根据本基站的优化需求和切换参数修改协商失败内容中未修改的小区 2到小区 1的切换参数配置, 决定是否重新发起切换参数修改协商过程。
上述协商过程结束后, 基站 1和基站 2都使用未修改的小区 1到小区 2 的切换参数配置和小区 2到小区 1的切换参数配置。
在其他实施例中, 基站 2在切换参数修改协商失败内容中除了携带未修 改的小区 2到小区 1的切换参数配置外, 还可以携带一个小区 2到小区 1的 切换参数可修改的范围, 这个切换参数可修改的范围可以是由 OAM配置或 者其它优化场景给出的, 此时, 基站 1根据本基站的优化需求和切换参数修 改协商失败内容中未修改的小区 2到小区 1的切换参数配置和该切换参数可 修改的范围, 决定是否重新发起切换参数修改协商过程。
还有一些实施例中, 基站 2可以在切换参数修改协商失败内容中携带切 换参数修改协商重新发起的等待时间, 此时, 基站 1必须在到达或者超过该 等待时间后, 才能发起下一次小区 1到小区 2的切换参数修改协商过程。
从上述实施例可以看出, 与现有技术中切换参数协商失败情况下返回的 切换参数修改参考值相比, 本发明技术方案在切换参数协商过程中, 可以向 源基站返回对端基站的切换参数配置, 或者返回对端基站的切换参数配置和 可修改的范围, 作为下次协商过程发起的参考。 这样, 就对具体的切换参数 配置进行了优化, 简化了整个协商的过程, 减少了网络资源的浪费, 提高了 网络的性能, 从而实现网络的自优化功能。 当然, 本发明还可有多种实施方式, 在不背离本发明精神及其实质的情 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进, 均应包含 在本发明所附的权利要求的保护范围之内。
工业实用性 釆用本发明技术方案, 可以对具体的切换参数配置进行优化, 简化整个 协商的过程, 减少网络资源的浪费, 提高网络的性能, 从而实现网络的自优 化功能。

Claims

权 利 要 求 书
1、 一种传输小区切换信息的方法, 该方法包括:
第一基站向相邻的第二基站发送切换参数修改协商请求, 所述切换参数 修改协商请求中携带预设置的第一基站所管辖的第一小区到第二基站所管辖 的第二小区的切换参数配置; 以及
所述第二基站接收所述切换参数修改协商请求, 当所述第二基站拒绝所 述切换参数修改协商请求中第一小区到第二小区的切换参数配置时, 向所述 第一基站返回切换参数修改协商失败消息, 所述切换参数修改协商失败消息 中携带当前第二小区到第一小区的切换信息。
2、 如权利要求 1所述的方法, 所述方法还包括:
所述第二基站接收所述切换参数修改协商请求后, 当所述第二基站接受 所述切换参数修改协商请求中第一小区到第二小区的切换参数配置时, 向所 述第一基站返回切换参数修改协商响应消息。
3、 如权利要求 2所述的方法, 其中,
所述切换参数修改协商响应消息中携带当前第二小区到第一小区的切换 信息, 所述当前第二小区到第一小区的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
新修改的第二小区到第一小区的切换参数配置;
新修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围。
4、 如权利要求 3所述的方法, 该方法还包括:
当所述第一基站收到所述切换参数修改协商响应消息时, 根据所述切换 参数修改协商请求中第一小区到第二小区的切换参数配置更新本地保存的第 一小区到第二小区的切换参数配置, 并保存所述切换参数修改协商响应消息 中当前第二小区到第一小区的切换信息。
5、 如权利要求 1、 2或 3所述的方法, 其中,
所述切换参数修改协商失败消息中所携带的当前第二小区到第一小区的 切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
未修改的第二小区到第一小区的切换参数配置和切换参数修改协商重新 发起的等待时间;
未修改的第二小区到第一小区的切换参数配置、 切换参数可修改的范围 和切换参数修改协商重新发起的等待时间。
6、 如权利要求 5所述的方法, 所述方法还包括:
所述第一基站收到所述切换参数修改协商失败消息时, 根据本基站的优 化需求和切换参数修改协商失败消息中当前第二小区到第一小区的切换信 息, 决定是否重新发起切换参数修改协商过程。
7、 如权利要求 5所述的方法, 其中,
所述切换参数修改协商请求、 切换参数修改协商响应消息和切换参数修 改协商失败消息为 XI接口消息或者 S1接口消息。
8、 如权利要求 5所述的方法, 其中,
所述第一基站通过移动管理实体向第二基站发送所述切换参数修改协商 请求, 所述第二基站通过移动管理实体向第一基站发送所述切换参数修改协 商响应消息或者切换参数修改协商失败消息。
9、一种传输小区切换信息的基站, 该基站包括接收模块、发送模块和处 理模块, 其中: 所述接收模块设置为: 接收对端基站发送的切换参数修改协商请求, 并 将所述切换参数修改协商请求发送给所述处理模块;
所述处理模块设置为: 接收所述切换参数修改协商请求, 若拒绝所述切 换参数修改协商请求中对端基站所管辖的第一小区到本基站所管辖的第二小 区的切换参数配置, 则将携带有当前所述第二小区到所述第一小区的切换信 息的切换参数修改协商失败消息发送给所述发送模块;
所述发送模块设置为: 接收所述切换参数修改协商失败消息, 并将所述 切换参数修改协商失败消息发送给所述对端基站。
10、 如权利要求 9所述的基站, 其中,
所述处理模块还设置为: 若接受所述切换参数修改协商请求中所述第一 小区到第二小区的切换参数配置, 则将切换参数修改协商响应消息发送给所 述发送模块;
所述发送模块还设置为: 接收所述切换参数修改协商响应消息, 并将所 述切换参数修改协商响应消息发送给对端基站。
11、 如权利要求 10所述的基站, 其中,
所述处理模块是设置为: 在所述切换参数修改协商响应消息中携带当前 所述第二小区到所述第一小区的切换信息, 当前第二小区到第一小区的切换 信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
新修改的第二小区到第一小区的切换参数配置;
新修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围。
12、 如权利要求 9、 10或 11所述的基站, 其中,
所述处理模块是设置为: 在所述切换参数修改协商失败消息中携带的当 前所述第二小区到所述第一小区的切换信息为以下任一种:
未修改的第二小区到第一小区的切换参数配置;
未修改的第二小区到第一小区的切换参数配置和切换参数可修改的范 围;
未修改的第二小区到第一小区的切换参数配置和切换参数修改协商重新 发起的等待时间;
未修改的第二小区到第一小区的切换参数配置、 切换参数可修改的范围 和切换参数修改协商重新发起的等待时间。
13、 如权利要求 9、 10或 11所述的基站, 其中,
所述处理模块还设置为: 更新本基站所管辖的第二小区到对端基站所管 辖的第一小区的切换参数, 并将携带所述第二小区到所述第一小区的切换参 数配置的切换参数修改协商请求发送给所述发送模块, 以及接收所述发送模 块发送的切换参数修改协商失败消息和切换参数修改协商响应消息, 并保存 所述切换参数修改协商失败消息中当前所述第一小区到所述第二小区的切换 信息;
所述发送模块还设置为: 接收所述切换参数修改协商请求, 并将所述切 换参数修改协商请求发送给对端基站;
所述接收模块还设置为: 接收对端基站返回的切换参数修改协商失败消 息和切换参数修改协商响应消息, 并将所述切换参数修改协商失败消息和切 换参数修改协商响应消息发送给所述处理模块。
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