WO2015096402A1 - 移动性参数协商方法及基站 - Google Patents

移动性参数协商方法及基站 Download PDF

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Publication number
WO2015096402A1
WO2015096402A1 PCT/CN2014/079480 CN2014079480W WO2015096402A1 WO 2015096402 A1 WO2015096402 A1 WO 2015096402A1 CN 2014079480 W CN2014079480 W CN 2014079480W WO 2015096402 A1 WO2015096402 A1 WO 2015096402A1
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Prior art keywords
parameter adjustment
base station
mobility parameter
negotiation
serving cell
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PCT/CN2014/079480
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English (en)
French (fr)
Inventor
韩立锋
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中兴通讯股份有限公司
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Publication of WO2015096402A1 publication Critical patent/WO2015096402A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0064Transmission or use of information for re-establishing the radio link of control information between different access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link

Definitions

  • the present invention relates to a mobility parameter negotiation technique in a Long Term Evolution (LTE) mobile communication system, and more particularly to a mobility parameter negotiation method and a base station in an LTE mobile communication system.
  • LTE Long Term Evolution
  • the LTE network is composed of an evolved universal land-based radio access network (E-UTRAN, Evolved UTRAN) base station (eNB, Evolved NodeB) and an EPC (Evolved Packet Core), and the network is flattened.
  • 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. Sl and X2 are logical interfaces.
  • One EPC can manage one or more eNBs, and one eNB can also be controlled by one or more EPCs, and one eNB can manage one or more cells.
  • Self-organizing network is a technology that automatically performs 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 and saving a large amount. Human and material resources.
  • the parameters of the cell reselection and handover are optimized according to a certain algorithm to improve the performance of the network.
  • 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 Communications (GSM, Global System For Mobile Communication) or CDMA (Code Division Multiple Access) system switching.
  • UTRAN Universal Terrestrial Radio Access Network
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • 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 smallest, compared to 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 area needs to be considered.
  • the adjustment of some handover parameters may have a great influence on the handover behavior of the UE to the neighboring cell, for example, cell individual offset (CIO, Cell Individual). Offset), frequency specific offset, and hysteresis parameters can trigger premature and late handovers to a particular neighboring cell or all neighboring cells to the UE.
  • the handover parameters of a cell are adjusted, and the relevant neighboring cells are also adjusted accordingly.
  • the UE shows a ping-pong handover diagram between Cell a and Enb A of eNB B, and the UE may be in the cell Cell b and Cell a due to inappropriate handover parameters between Cell b and Cell a. Ping ping is performed between.
  • a related handover parameter negotiation mechanism is used for the handover parameter adjustment process.
  • the base station to which Cell a belongs When Cell a adjusts the handover parameters of Cell a to Cell b handover, the 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 adjustment reference value and a suitable cause value.
  • the base station to which the cell a belongs receives the handover parameter negotiation confirmation message, and the new handover parameter configuration is valid. When the handover parameter negotiation rejection message is received, the new handover parameter is not used.
  • the negotiation process will be initiated again the next time.
  • the negotiation process of the handover parameters can be optimized by using the mobile robustness optimization to optimize the handover parameters, and can also be used for load balancing, that is, the load balancing between the cells is realized by the mobility process brought by the change of the handover parameters.
  • the parameters of the cell reselection mainly include the offset between the serving cell and the neighboring cell (Qoffsets, n) and the frequency offset (Qoffsetfrequency) of the same frequency priority, and may also include the hysteresis value (Qhyst) of the rank ordering at the time of reselection.
  • the technical problem to be solved by the embodiments of the present invention is to provide a mobility parameter negotiation method and a base station to solve the technical problem that the mobility parameter negotiation is low in effectiveness.
  • a mobility parameter negotiation method comprising:
  • the first base station sends a mobility parameter adjustment negotiation request message to the second base station, where the mobility parameter adjustment negotiation request message carries the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information;
  • the second base station sends a mobility parameter adjustment negotiation response message to the first base station, where the mobility parameter adjustment negotiation response message carries the mobility parameter adjustment negotiation result information;
  • the mobility parameter adjustment negotiation response message sent by the second base station is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, a mobility parameter adjustment negotiation response message, carries the mobility parameter adjustment negotiation result information;
  • the load information is at least one of the following information:
  • Indication information indicating the level of the load
  • the mobility parameter adjustment coordination request message further carries deployment characteristic information of the serving cell, where the deployment characteristic information of the serving cell includes at least one of the following information: a type of the serving cell, a serving cell, and a target The coverage relationship of the neighboring cell, the deployment purpose of the serving cell, and the primary coverage cell of the serving cell.
  • the mobility parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value respectively corresponding to the multiple load information.
  • the method further includes:
  • the first base station adjusts the mobility parameter according to the mobility parameter adjustment negotiation result corresponding to the current load information of the serving cell, and notifies the second base station.
  • a base station includes a request sending module and a response receiving module, wherein:
  • the request sending module is configured to: send a mobility parameter adjustment negotiation request message to the other base station, where the mobility parameter adjustment negotiation request message carries the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information;
  • the response receiving module is configured to: receive a mobility parameter adjustment negotiation response message sent by the other base station, where the mobility parameter adjustment negotiation response message carries mobility parameter adjustment negotiation result information.
  • the base station further includes: a request receiving module and a response sending module, where: the request receiving module is configured to: receive the mobility parameter adjustment negotiation request message sent by another base station; and the response sending module is configured to: The mobility parameter adjustment negotiation response message is sent to the base station that sends the mobility parameter adjustment negotiation request message.
  • the load information is at least one of the following information:
  • Indication information indicating the level of the load
  • the mobility parameter adjustment coordination request message further carries deployment characteristic information of the serving cell, where the deployment characteristic information of the serving cell includes at least one of the following information: a type of the serving cell, a serving cell, and a target adjacency The coverage relationship of the cell, the deployment purpose of the serving cell, and the primary coverage cell of the serving cell.
  • the mobility parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value respectively corresponding to the multiple load information.
  • the base station further includes: a parameter adjustment module, where:
  • the parameter adjustment module is configured to: adjust the mobility parameter according to the mobility parameter adjustment negotiation result corresponding to the current load information of the serving cell, and notify other base stations.
  • the base station further includes: a parameter adjustment module, where:
  • the parameter adjustment module is configured to: enable mobility negotiation parameters corresponding to the notification according to notifications of other base stations.
  • a base station includes a request receiving module and a response sending module, where:
  • the request receiving module is configured to: receive a mobility parameter adjustment negotiation sent by another base station, And requesting, the mobility parameter adjustment negotiation request message carries load information of the serving cell and a mobility parameter adjustment value corresponding to the load information;
  • the response sending module is configured to: send a mobility parameter adjustment negotiation response message to the other base station, where the mobility parameter adjustment negotiation response message carries the mobility parameter adjustment negotiation result information.
  • the load information is at least one of the following information:
  • Indication information indicating the level of the load
  • the mobility parameter adjustment coordination request message further carries deployment characteristic information of the serving cell, where the deployment characteristic information of the serving cell includes at least one of the following information: a type of the serving cell, a serving cell, and a target The coverage relationship of the neighboring cell, the deployment purpose of the serving cell, and the primary coverage cell of the serving cell.
  • the mobility parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value respectively corresponding to the multiple load information.
  • the base station further includes: a parameter adjustment module, where the parameter adjustment module is configured to: enable mobility negotiation parameters corresponding to the notification according to notifications of other base stations.
  • the mobility parameter negotiation method and the base station in the embodiment of the present invention carry the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information in the mobility parameter adjustment negotiation request message to improve the efficiency of the negotiation process, and
  • the plurality of load information of the serving cell and the mobility parameter adjustment value corresponding to the multiple load information are respectively carried in the dynamic parameter adjustment negotiation request message, which can reduce the number of negotiation in the network and reduce the negotiation process. Bringing impact on signaling in the network, thereby improving the performance of the entire network.
  • FIG. 1 is a schematic diagram of a ping-pong switch between a cellb and a cella by a UE in the related art
  • 2 is a schematic flowchart of a mobility parameter negotiation method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a mobility parameter negotiation method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a mobility parameter negotiation method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station module according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station module according to an embodiment of the present invention. Preferred embodiment of the invention
  • the method of the embodiment of the present invention is described from the perspective of the first base station (herein, the base station that sends the mobility parameter adjustment negotiation request message is referred to as the first base station, and the base station that receives the request message is referred to as the second base station).
  • the mobility parameter negotiation method of the first embodiment of the present invention includes: Step 201: The first base station sends a mobility parameter adjustment negotiation request message to the second base station, where the load information of the serving cell and the mobility corresponding to the load information are carried.
  • the parameter adjustment value; the load information is at least one of the following:
  • Indication information indicating the level of the load
  • the mobility parameter adjustment coordination request message further carries deployment characteristic information of the serving cell, and the deployment characteristic information of the serving cell includes at least one of the following: a class of a serving cell Type, coverage relationship of the serving cell and the target neighboring cell, deployment purpose of the serving cell, and primary coverage cell of the serving cell.
  • the mobility parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value respectively corresponding to the multiple load information.
  • Step 202 The first base station receives a mobility parameter adjustment negotiation response message sent by the second base station, where the mobility parameter adjustment negotiation result information is carried.
  • the method further includes: the first base station adjusting the mobility parameter according to the mobility parameter adjustment negotiation result corresponding to the current load information of the serving cell, and notifying the second base station .
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the mobility parameter negotiation method in Embodiment 2 of the present invention includes the following steps: Step 310: A first base station generates a negotiated mobility parameter.
  • the first base station determines to modify the mobility parameter of the neighboring cell 2 under the jurisdiction of the serving cell 1 to the second base station according to the optimization requirement of the mobility robustness or the optimization requirement of the load balancing, and generates the target neighboring cell 2 to the service.
  • the mobility parameter request value of the cell 1, or the mobility parameter adjustment value of the target neighboring cell 2 to the serving cell 1; the mobility parameter request value of the serving cell 1 to the target neighboring cell 2 may also be generated according to the adjustment requirement, or the serving cell 1 The mobility parameter adjustment value to the target neighboring cell 2.
  • the mobility parameter request value of the serving cell 1 to the target neighboring cell 2 indicates the mobility parameter configuration result of the adjusted serving cell 1 to the target neighboring cell 2 desired by the serving cell 1, that is, the serving cell 1 to the target adjacency
  • the mobility threshold of the cell 2 (including the handover threshold or the cell reselection threshold); the mobility parameter adjustment value of the serving cell 1 to the target neighboring cell 2 refers to the amount of change of the mobility parameter value; the target neighboring cell 2 to the service
  • the cell 1 mobility parameter request value refers to the mobility threshold of the target neighboring cell 2 to the serving cell 1 that the first base station proposes to be adjusted by the second base station; the mobility parameter adjustment value of the target neighboring cell 2 to the serving cell 1 refers to the first
  • the base station proposes a change amount of the mobility threshold of the second neighboring base station to the target neighboring cell 2 to the serving cell 1.
  • Step 302 The first base station sends a mobility parameter adjustment negotiation request message to the second base station, where the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information are sent, and the mobility parameter adjustment negotiation process is initiated to the second base station. ;
  • the first base station includes a target neighboring cell 2 to the serving cell 1 mobility parameter adjustment value in the mobility parameter adjustment negotiation request message, and may further include a mobility parameter request value of the serving cell 1 to the target neighboring cell 2, and the serving cell 1
  • the mobility parameter adjustment value of the target neighboring cell 2; the target part connects one or more of the cell 2 to the serving cell 1 mobility parameter request value.
  • the mobility parameter negotiation is the handover negotiation
  • the mobility parameter is a handover parameter
  • the mobility parameter negotiation is the cell reselection negotiation
  • the mobility parameter is a cell reselection parameter
  • the load information may be indication information of high, medium, and low cell load; or may be an indication of different load intervals of the cell, for example, the load interval may be divided into 5 segments, and 1-5 is used to indicate different load intervals; Specific load value.
  • the mobility parameter adjustment negotiation request message carries the deployment characteristic information of the serving cell 1.
  • the deployment characteristic information of the serving cell 1 may include, but is not limited to, the cell type of the serving cell 1, the coverage relationship of the serving cell 1 and the target neighboring cell 2, the deployment purpose of the serving cell 1, and the primary coverage cell of the serving cell 1. Item or items.
  • the cell type may be a large area, a medium cell, a small cell, or the like; the coverage relationship of the serving cell 1 and the target neighboring cell 2 includes the same coverage, inclusion, inclusion, etc.; Refers to coverage purposes such as coverage compensation, capacity enhancement, hotspot cell, and data offload.
  • the primary coverage area of the serving cell 1 refers to the cell identification information that provides basic coverage for the area of the serving cell 1.
  • Step 303 After receiving the mobility parameter adjustment negotiation request message, the second base station determines whether the mobility parameter negotiation can be accepted.
  • the second base station may determine whether the mobility parameter negotiation can be accepted according to the information of the target cell 2, the information of the serving cell 1, and the like. For example, the deployment purpose of the serving cell 1, the load information, and the coverage of the serving cell 1 and the target cell 2 may be considered. A plurality of items in the relationship, the primary coverage cell of the serving cell 1, and the like, determine whether to accept the request for the mobility parameter adjustment. For example, if the load of the serving cell 1 is relatively high, a wider range of mobility parameter adjustments can be accepted, that is, a larger handover boundary of the serving cell 1 can be accepted, so that more users can switch to the target cell 2.
  • the information of the target cell 2 and the information of the serving cell 1 may include the load information of the cell, the type of the target cell and the serving cell 1, the coverage relationship of the serving cell 1 and the target neighboring cell 2, the deployment purpose of the target cell and the serving cell 1, Information such as the primary coverage cell of the serving cell 1.
  • Step 304 The second base station feeds back a mobility parameter adjustment negotiation response message to the first base station.
  • the mobility parameter adjustment negotiation response message carries the identification information of the target neighboring cell 2 and the serving cell 1, and may further include the load indication information of the serving cell 1.
  • the first base station may adjust the mobility parameter of the serving cell 1 to the target neighboring cell 2, improve handover performance, or perform load balancing between cells.
  • the second base station If the second base station does not accept the negotiation, the second base station returns a response message indicating that the mobility parameter adjustment negotiation fails to the first base station, and indicates to the first base station that the mobility parameter adjustment negotiation process initiated by the first base station is not accepted;
  • the second base station may carry the mobility parameter current value of the target neighboring cell 2 to the serving cell 1 and/or the mobility parameter adjustment of the acceptable target neighboring cell 2 to the serving cell 1 in the mobility parameter adjustment negotiation failure message.
  • the range of the mobility parameter adjustment range of the acceptable target neighboring cell 2 to the serving cell 1 and the acceptable mobility parameter adjustment range of the serving cell 1 to the neighboring cell may be according to Operation Administration And Maintenance (Operation Administration and Maintenance, The OAM configuration or other optimization scenario is given; after receiving the mobility parameter adjustment negotiation failure message, the first base station according to the current value of the mobility parameter of the neighboring cell to the serving cell 1 and/or the acceptable neighboring cell to The mobility parameter adjustment range of the serving cell 1 determines whether to return to step 302 to re-initiate the mobility parameter adjustment negotiation process.
  • the mobility parameter adjustment negotiation failure message may carry a waiting time; after receiving the mobility parameter adjustment negotiation failure message, the first base station After waiting at least for the waiting time, it may return to step 301 to continue execution.
  • the negotiation attempt is continuously performed according to the requirement of the first base station. If the negotiation failure message carries the allowed range, the first base station may coordinate to the negotiation range of other base stations or increase the negotiated base station, and then renegotiate with the second base station. Therefore, if the first negotiation is unsuccessful, the time spent in the entire completion negotiation process is lengthened, and the delay is for a high-load cell. The impact is also large, because it will affect the switching behavior between base stations.
  • a macro cell In the case of dense cell deployment, for example, a macro cell will have a very large number of neighbors of small cells. In the case that the load change of the small cell is relatively fast, for example, the small cell is used as the hotspot coverage, the small cell needs to frequently adjust the mobility parameter to perform load balancing, and the mobility parameter negotiation between the macro cell and the surrounding small cell is required frequently. . Therefore, a large number of mobility parameter negotiation processes will be generated in the entire network. The time consuming of the negotiation process will affect the actual real-time UE mobility. A large number of negotiation times will also have a great impact on the network signaling.
  • the following third embodiment proposes a specific solution to the above problem.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the mobility parameter negotiation method in the third embodiment of the present invention includes the following steps: Step 401: A first base station generates a negotiated mobility parameter.
  • the first base station determines to adjust the mobility parameter of the neighboring cell 2 under the jurisdiction of the serving cell 1 to the second base station according to the information such as the cell load and the cell deployment purpose, and generates the mobility of the target neighboring cell 2 to the serving cell 1 according to the adjustment requirement.
  • the mobility parameter request value of the serving cell 1 to the target neighboring cell 2 indicates the mobility parameter configuration result of the adjusted serving cell 1 to the target neighboring cell 2 desired by the serving cell 1, that is, the serving cell 1 to the target adjacency
  • the mobility threshold of the cell 2 (including the handover threshold or the cell reselection threshold); the mobility parameter adjustment value of the serving cell 1 to the target neighboring cell 2 refers to the amount of change of the mobility parameter value; the target neighboring cell 2 to the service
  • the cell 1 mobility parameter request value refers to the mobility threshold of the target neighboring cell 2 to the serving cell 1 that the first base station proposes to be adjusted by the second base station; the mobility parameter adjustment value of the target neighboring cell 2 to the serving cell 1 refers to the first
  • the base station proposes the variable of the second base station to the mobility threshold of the target neighboring cell 2 to the serving cell 1.
  • the combination of the mobility parameters of the request adjustment is defined as a set of mobility negotiation parameters.
  • the first base station may generate different mobility negotiation parameters according to different load interval indications. For example, the load interval of the 4 bar month service cell can be divided into 5 segments, then 5 sets of mobility negotiation parameters can be generated, and 3 sets of mobility negotiation parameters can also be generated, that is, multiple different load intervals can correspond to a set of mobility negotiation parameters. .
  • Step 402 The first base station sends a mobility parameter adjustment negotiation request message to the second base station, where the multiple load information of the serving cell and the mobility parameter adjustment value corresponding to the multiple load information are respectively carried.
  • the second base station initiates a mobility parameter adjustment negotiation process;
  • the first base station includes a target neighboring cell 2 to the serving cell 1 mobility parameter adjustment value in the mobility parameter adjustment negotiation request message, and may further include a mobility parameter request value of the serving cell 1 to the target neighboring cell 2, and the serving cell 1
  • the combination of the mobility parameters of the request adjustment is defined as a set of mobility negotiation parameters (also referred to as mobility parameter adjustment values).
  • Each set of parameters can be set with an identifier, that is, a mobility negotiation parameter identifier.
  • the mobility parameter negotiation is the handover negotiation
  • the mobility parameter is a handover parameter
  • the mobility parameter negotiation is the cell reselection negotiation
  • the mobility parameter is a cell reselection parameter
  • the load information may be indication information of high, medium, and low cell load; or may be an indication of different load intervals of the cell, for example, the load interval may be divided into 5 segments, and 1-5 is used to indicate different load intervals; Specific load value.
  • the mobility parameter adjustment negotiation request message carries the deployment characteristic information of the serving cell 1.
  • the deployment characteristic information of the monthly service cell 1 may include the type of the monthly service cell 1, the coverage relationship of the serving cell 1 and the target neighboring cell 2, the deployment purpose of the serving cell 1, and the primary coverage cell of the serving cell 1. Item or items.
  • the cell type may be a large area, a medium cell, a small cell, or the like; the coverage relationship of the serving cell 1 and the target neighboring cell 2 includes the same coverage, inclusion, and inclusion relationship; the deployment purpose of the cell refers to coverage. Compensation, capacity enhancement, hotspot cell, data offload and other deployment purposes.
  • the primary coverage cell of the serving cell 1 refers to the cell identification information that provides basic coverage for the area of the serving cell 1.
  • Step 403 After receiving the mobility parameter adjustment negotiation request message, the second base station determines whether the mobility parameter negotiation can be accepted.
  • the second base station may determine whether the mobility parameter negotiation can be accepted according to the information of the target cell, the information of the serving cell 1, and the like, that is, whether the adjustment of all the mobility parameters is accepted; the information of the target cell and the information of the serving cell 1 may be Contains the load information of the cell, the type of the target neighboring cell 2 and the serving cell 1, the coverage relationship of the serving cell 1 and the target neighboring cell 2, and the target adjacency Information such as the deployment purpose of the cell 2 and the serving cell 1, and the primary coverage cell of the serving cell 1. For example, if the serving cell 1 is a small cell and is covered by the target neighboring cell 2 to provide capacity enhancement, the second base station may consider the adjustment of the mobility parameter that is acceptable when the serving cell 1 has different load intervals. The base station may determine that the small cell 1 can provide a certain capacity, and when the load is relatively high, the load can be balanced to the cell 2 by modifying the handover parameter.
  • Step 404 The second base station feeds back the mobility parameter adjustment negotiation response message to the first base station.
  • the mobility parameter adjustment negotiation response message carries the identification information of the neighboring cell and the serving cell 1.
  • the mobility parameter adjustment range of the acceptable target neighboring cell 2 to the serving cell 1 and the acceptable mobility parameter adjustment range of the serving cell 1 to the neighboring cell may be according to Operation Administration And Maintenance (OAM). Configuration or other optimization scenarios are given;
  • the second base station When the second base station does not accept the adjustment of all the mobility parameters, the second base station returns a response message indicating that the mobility parameter adjustment negotiation fails to the first base station, where the second base station may include the negotiated mobility negotiation parameter in the message.
  • logo When the second base station does not accept the adjustment of all the mobility parameters, the second base station returns a response message indicating that the mobility parameter adjustment negotiation fails to the first base station, where the second base station may include the negotiated mobility negotiation parameter in the message.
  • the second base station may carry the mobility negotiation parameter identifier in the mobility parameter adjustment negotiation failure message, and may also include the mobility of the target neighboring cell 2 to the serving cell 1 corresponding to the load indication.
  • the first base station After receiving the response message indicating that the mobility parameter adjustment negotiation fails, the first base station determines whether to return to step 401 to re-initiate the mobility parameter adjustment negotiation process;
  • the first base station determines, according to the current value of the mobility parameter of the neighboring cell to the serving cell 1 and/or the acceptable mobility parameter of the neighboring cell to the serving cell 1, and determines whether to return to step S310 to re-initiate the mobility parameter adjustment negotiation process. .
  • the mobility parameter adjustment negotiation failure message may carry a waiting time; after receiving the mobility parameter adjustment negotiation failure message, the first base station After waiting at least for the waiting time, it may return to step 401 to continue execution.
  • Step 405 When the load information of the serving cell 1 changes, the first base station indicates the target cell. ⁇ use the mobility negotiation parameters corresponding to the current load information;
  • the first base station may send the message 1 to the second base station, indicating that the target cell uses the mobility negotiation parameter corresponding to the interval 2.
  • the message 1 may include information such as a load interval indication or a mobility negotiation parameter identifier of the service cell 1 and an identifier of the serving cell 1 and the target neighboring cell 2.
  • Step 406 The second base station enables the corresponding mobility negotiation parameter according to the indication.
  • the second base station receives the message 1 and enables the mobility parameter of the target neighboring cell 2 to the serving cell 1 corresponding to the load interval indication or the mobility negotiation parameter identifier.
  • load balancing can be smoothly implemented between cells without frequent mobility parameter negotiation.
  • the first base station may initiate a negotiation process to multiple second base stations, and multiple negotiation responses are received.
  • the first base station may only re-negotiate several of the second base stations, and send mobility parameter adjustment. Indicate the message.
  • the mobility parameter adjustment negotiation process may be used to negotiate handover parameters and cell reselection parameters.
  • the mobility parameter is the handover parameter;
  • the mobility parameter adjustment negotiation process is only used to negotiate the cell reselection parameters, the mobility parameter is the cell reselection. parameter.
  • the handover parameter of the serving cell to the neighboring cell refers to a decision parameter of a handover event of the serving cell to the neighboring cell, and includes a cell individual offset (CIO) and a frequency offset (frequency specific offset) of the neighboring cell, optionally Contains hysteresis parameters for mobility events, etc.
  • the handover parameters of the neighboring cell to the serving cell correspond to this.
  • the A3 event For example, the A3 event:
  • 0& is the frequency offset of the connected cell
  • Ocn is the individual cell offset of the connected cell;
  • Hys which is the hysteresis parameter of the A3 event;
  • Ms is the measurement result of the Yueliang Community
  • Ocs which is the cell individual offset of the serving cell
  • Off is the offset parameter of the A3 event.
  • the cell reselection parameter mainly includes a bias of the serving cell and the adjacent interval (Qoffsets, n) and a frequency offset (Qoffsetfrequency) of the same frequency priority, and optionally, a hysteresis value (Qhyst) of the rank order in the reselection. .
  • the cell reselection parameters of the neighboring cell to the serving cell correspond to this.
  • the mobility parameter adjustment value refers to a change value of the total offset in the handover event decision of the serving cell and the neighboring cell, or refers to a change value of the total offset of the serving cell and the neighboring cell in the cell reselection decision.
  • the message in the mobility parameter adjustment negotiation process of the embodiment of the present invention may be an independent message of the X2 interface, or an independent message of the S1 interface, or may be a message existing in other related technologies, that is, by, for example,
  • the base station configuration transmission message (eNB CONFIGURATION TRANSFER) and the mobility management unit configuration transmission message (MME CONFIGURATION TRANSFER) and the like transmit the interaction information in the mobility parameter negotiation process.
  • the mobility parameter adjustment negotiation process of the serving cell of the first base station to the neighboring cell of the second base station may be performed by a certain event, such as mobility parameter adjustment caused by load balancing optimization or mobility optimization. event.
  • the mobility parameter adjustment negotiation in the technical solution of the embodiment of the present invention is implemented by message interaction between base stations.
  • base stations When there is an X2 interface between the base stations, they can communicate with each other through the interface messages of the X2 interface. If there is no X2 interface between the base stations, they can interact through the interface messages of the S1 interface.
  • the embodiment of the present invention further provides a base station.
  • the request sending module 501, the response receiving module 502, and the request sending module 501 are configured to Transmitting, by the second base station, a mobility parameter adjustment negotiation request message, where the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information are carried;
  • the response receiving module 502 is configured to: receive the mobility parameter adjustment negotiation response message sent by the second base station, where the mobility parameter adjustment negotiation result information is carried; When the base station is used as the second base station, the request receiving module 503 and the response sending module 504 are included, where:
  • the request receiving module 503 is configured to: receive the mobility parameter adjustment negotiation request message sent by the first base station;
  • the response sending module 504 is configured to: adjust the negotiation response message to the mobility parameter sent by the first base station.
  • the load information is at least one of the following:
  • Indication information indicating the level of the load
  • the mobility parameter adjustment coordination request message further carries the deployment characteristic information of the serving cell, where the deployment characteristic information of the serving cell includes at least one of the following: a type of the serving cell, a serving cell, and a target neighboring cell. Coverage relationship, deployment purpose of the serving cell, and primary coverage cell of the serving cell.
  • the mobility parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value respectively corresponding to the multiple load information.
  • the base station of the embodiment further includes: a parameter adjustment module 601, where the parameter adjustment module 601 is configured to: adjust the mobility parameter according to the mobility parameter adjustment negotiation result corresponding to the current load information of the serving cell, And notifying the second base station, where the base station is the first base station in the method embodiment; the parameter adjustment module 601 is configured to: enable the corresponding mobility negotiation parameter according to the notification of the first base station, where the base station acts as The second base station in the method embodiment.
  • the mobility parameter negotiation method and the base station in the embodiment of the present invention carry the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information in the mobility parameter adjustment negotiation request message to improve the efficiency of the negotiation process, and further, the present invention
  • the dynamic parameter adjustment negotiation request message carries multiple load information of the serving cell and a mobility parameter adjustment value corresponding to the multiple load information, which can reduce the number of negotiation in the network, and reduce the negotiation process. The impact on signaling in the network, thereby improving the performance of the entire network.
  • the invention may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the mobility parameter negotiation method and the base station in the embodiment of the present invention carry the mobility parameter adjustment negotiation request message carrying the load information of the serving cell and the mobility parameter adjustment value corresponding to the load information to improve the efficiency of the negotiation process.
  • the multiple parameter information of the serving cell and the mobility parameter adjustment value corresponding to the multiple load information are respectively carried in the dynamic parameter adjustment negotiation request message, which can reduce the number of negotiation in the network and reduce As the negotiation process brings impact on signaling in the network, the performance of the entire network is improved. Therefore, the present invention has strong industrial applicability.

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Abstract

一种移动性参数协商方法及基站,该方法包括:第一基站向第二基站发送移动性参数调整协商请求消息,其中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整值;所述第一基站接收第二基站发送的移动性参数调整协商响应消息,其中携带所述移动性参数调整协商结果信息。上述技术方案的移动性参数协商方法及基站可以提高移动性参数协商有效性。

Description

移动性参数协商方法及基站
技术领域
本发明涉及长期演进( LTE , Long Term Evolution )移动通信系统中的移 动性参数协商技术, 尤其涉及 LTE移动通信系统中的移动性参数协商方法及 基站。
背景技术
LTE网络由演进的通用陆基无线接入网 ( E-UTRAN, Evolved UTRAN ) 基站( eNB, Evolved NodeB )和演进分组交换中心( EPC, Evolved Packet Core ) 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也可以受控于一个或多个 EPC, —个 eNB可 以管理一个或多个小区。
自组网 (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, 节约了大量的人力物力。
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基无线接入网 (UTRAN, Universal Terrestrial Radio Access Network ) 或全球移动通信系统 (GSM, Global System For Mobile Communication )或码分多址 ( CDMA, Code Division Multiple Access ) 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小, 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。 在调整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 切换参数的调整会对 UE到邻区的切换行为产生很大的影响, 例如小区个体 偏移 (CIO, Cell Individual Offset ) 、 频率偏移 ( frequency specific offset )和 迟滞(Hysteresis )参数, 能够触发到 UE的到特定邻接小区或所有邻接小区 的过早和过晚的切换。 在 4艮多场景下, 一个小区的切换参数进行调整, 其相 关邻区也要相应的进行调整。
如果一个小区的切换参数的调整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。 如图 1所示, UE在 eNB B的小区 Cell b和 Enb A的 Cell a 间乒乓切换示意图所示, UE由于 Cell b和 Cell a间的不合适的切换参数会在 小区 Cell b和 Cell a之间进行乒乓切换。 相关的一种切换参数协商的机制用 于切换参数的调整过程, Cell a调整 Cell a到 Cell b切换的切换参数时, Cell a 所属的基站必须与邻接 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调整参考值和一个合 适的原因值。 Cell a所属的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。 切换参数的协商过程可以用移动鲁棒性优化来优化切换参 数提供切换性能, 还可以用于负荷均衡, 即通过切换参数的改变带来的移动 性过程实现小区间的负荷均衡。
对于小区重选的参数调整来说, 也是釆用同样的协商方式。 小区重选的 参数主要包括服务小区和邻接小区之间的偏置 (Qoffsets,n ) 以及同一频率优 先级的频率偏置 ( Qoffsetfrequency ) , 还可以包括重选时等级排序的迟滞值 ( Qhyst ) 。
但目前的移动性协商方法的有效性仍比较低下。
发明内容
本发明实施例要解决的技术问题是提供一种移动性参数协商方法及基 站, 以解决移动性参数协商有效性低的技术问题。
为了解决上述技术问题, 釆用如下技术方案: 一种移动性参数协商方法, 该方法包括:
第一基站向第二基站发送移动性参数调整协商请求消息, 所述移动性参 数调整协商请求消息中携带服务小区的负荷信息以及与该负荷信息对应的移 动性参数调整值;
所述第二基站向所述第一基站发送移动性参数调整协商响应消息, 所述 移动性参数调整协商响应消息中携带所述移动性参数调整协商结果信息; 所述第一基站接收所述第二基站发送的所述移动性参数调整协商响应消 息。
可选地, 所述负荷信息是以下信息中的至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
可选地, 所述移动性参数调整协调请求消息还携带有所述服务小区的部 署特性信息, 所述服务小区的部署特性信息包括以下信息中的至少一个: 服 务小区的类型、服务小区和目标邻接小区的覆盖关系、服务小区的部署目的、 服务小区的主覆盖小区。
可选地, 所述移动性参数调整协商请求消息中携带所述服务小区的多个 负荷信息以及与所述多个负荷信息分别对应的移动性参数调整值。
可选地, 所述第一基站接收所述第二基站发送的接收移动性参数调整协 商响应消息后, 该方法还包括:
所述第一基站根据服务小区当前负荷信息对应的移动性参数调整协商结 果调整移动性参数, 并通知所述第二基站。
一种基站, 包括请求发送模块和响应接收模块, 其中:
所述请求发送模块设置成: 向其他基站发送移动性参数调整协商请求消 息, 所述移动性参数调整协商请求消息中携带服务小区的负荷信息以及与该 负荷信息对应的移动性参数调整值; 所述响应接收模块设置成: 接收其他所述基站发送的移动性参数调整协 商响应消息, 所述移动性参数调整协商响应消息中携带移动性参数调整协商 结果信息。
可选地, 该基站还包括: 请求接收模块和响应发送模块, 其中: 所述请求接收模块设置成: 接收其他基站发送的所述移动性参数调整协 商请求消息; 所述响应发送模块设置成: 向发送所述移动性参数调整协商请求消息的 基站发送所述移动性参数调整协商响应消息。
可选地, 所述负荷信息是以下信息中的至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
可选地, 所述移动性参数调整协调请求消息还携带所述服务小区的部署 特性信息, 所述服务小区的部署特性信息包括以下信息中的至少一个: 服务 小区的类型、 服务小区和目标邻接小区的覆盖关系、 服务小区的部署目的、 服务小区的主覆盖小区。
可选地, 所述移动性参数调整协商请求消息中携带所述服务小区的多个 负荷信息以及与所述多个负荷信息分别对应的移动性参数调整值。
可选地, 所述基站还包括: 参数调整模块, 其中:
所述参数调整模块设置成: 根据服务小区当前负荷信息对应的移动性参 数调整协商结果调整移动性参数, 并通知其他所述基站。
可选地, 所述基站还包括: 参数调整模块, 其中:
所述参数调整模块设置成: 根据其他基站的通知启用与所述通知对应的 移动性协商参数。
一种基站, 包括请求接收模块和响应发送模块, 其中:
所述请求接收模块设置成: 接收其他基站发送的移动性参数调整协商请 求消息, 所述移动性参数调整协商请求消息中携带服务小区的负荷信息以及 与该负荷信息对应的移动性参数调整值;
所述响应发送模块设置成: 向其他所述基站发送移动性参数调整协商响 应消息, 所述移动性参数调整协商响应消息中携带移动性参数调整协商结果 信息。
可选地, 所述负荷信息是以下信息中的至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
可选地, 所述移动性参数调整协调请求消息还携带所述服务小区的部署 特性信息, 所述服务小区的部署特性信息包括以下信息中的至少一项: 服务 小区的类型、 服务小区和目标邻接小区的覆盖关系、 服务小区的部署目的、 服务小区的主覆盖小区。
可选地, 所述移动性参数调整协商请求消息中携带所述服务小区的多个 负荷信息以及与所述多个负荷信息分别对应的移动性参数调整值。
可选地, 所述基站还包括: 参数调整模块, 所述参数调整模块设置成: 根据其他基站的通知启用与所述通知对应的移动性协商参数。
本发明实施例的移动性参数协商方法及基站, 在移动性参数调整协商请 求消息中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整 值以提高协商过程的效率, 另外, 本发明实施例在动性参数调整协商请求消 息中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的 移动性参数调整值, 可减少网络中协商次数, 减轻由于协商过程带来对网络 中信令的冲击, 从而提高了整个网络的性能。 附图概述
附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本 发明的实施例一起用于解释本发明, 并不构成对本发明的限制。 在附图中: 图 1为相关技术中 UE在 cellb和 cella之间乒乓切换的示意图; 图 2为本发明实施例 的移动性参数协商方法流程示意图 图 3为本发明实施例 的移动性参数协商方法流程示意图
图 4为本发明实施例 的移动性参数协商方法流程示意图
图 5为本发明实施例 的基站模块结构示意图;
图 6为本发明实施例 的基站模块结构示意图。 本发明的较佳实施方式
以下将结合附图及实施例来详细说明本发明的实施方式, 借此对本发明 如何应用技术手段来解决技术问题, 并达成技术效果的实现过程能充分理解 并据以实施。
需要说明的是, 如果不冲突, 本发明实施例以及实施例中的各个特征可 以相互结合, 均在本发明的保护范围之内。 另外, 在附图的流程图示出的步 骤可以在诸如一组计算机可执行指令的计算机系统中执行, 并且, 虽然在流 程图中示出了逻辑顺序, 但是在某些情况下, 可以以不同于此处的顺序执行 所示出或描述的步骤。
实施例一
从第一基站 (本文中, 将发送移动性参数调整协商请求消息的基站称为 第一基站, 将接收请求消息的基站称为第二基站) 的角度对本发明实施例方 法进行描述, 如图 2所示, 本发明实施例一的移动性参数协商方法包括: 步骤 201 : 第一基站向第二基站发送移动性参数调整协商请求消息, 其 中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整值; 所述负荷信息是以下至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
可选地, 所述移动性参数调整协调请求消息还携带所述服务小区的部署 特性信息, 所述服务小区的部署特性信息包括以下至少一项: 服务小区的类 型、 服务小区和目标邻接小区的覆盖关系、 服务小区的部署目的、 服务小区 的主覆盖小区。
可选地, 所述移动性参数调整协商请求消息中携带所述服务小区的多个 负荷信息以及与所述多个负荷信息分别对应的移动性参数调整值。
步骤 202: 所述第一基站接收第二基站发送的移动性参数调整协商响应 消息, 其中携带所述移动性参数调整协商结果信息。
可选地, 接收移动性参数调整协商响应消息后, 该方法还包括: 所述第 一基站根据服务小区当前负荷信息对应的移动性参数调整协商结果调整移动 性参数, 并通知所述第二基站。
以下结合第一基站和第二基站的处理, 对本发明实施例移动性参数协商 方法进行说明:
实施例二:
如图 3所示, 本发明实施例二的移动性参数协商方法包括以下步骤: 步骤 310, 第一基站生成协商的移动性参数;
第一基站根据移动性健壮性的优化需求或者负荷均衡的优化需求, 决定 修改第一基站的服务小区 1到第二基站所辖的邻接小区 2的移动性参数, 并 生成目标邻接小区 2到服务小区 1的移动性参数请求值, 或者目标邻接小区 2到服务小区 1 的移动性参数调整值; 还可以根据调整需求生成服务小区 1 到目标邻接小区 2的移动性参数请求值, 或者服务小区 1到目标邻接小区 2 的移动性参数调整值。
其中, 该服务小区 1到目标邻接小区 2的移动性参数请求值表示服务小 区 1所期望的调整后的服务小区 1到目标邻接小区 2的移动性参数配置结果, 即该服务小区 1到目标邻接小区 2的移动性门限(包含切换门限或小区重选 门限) ; 该服务小区 1到目标邻接小区 2的移动性参数调整值, 是指该移动 性参数值的变化量; 目标邻接小区 2到服务小区 1移动性参数请求值, 是指 第一基站建议第二基站调整到的目标邻接小区 2到服务小区 1的移动性门限; 目标邻接小区 2到服务小区 1移动性参数调整值是指第一基站建议第二基站 对目标邻接小区 2到服务小区 1的移动性门限的改变量。 步骤 302 , 第一基站向第二基站发送移动性参数调整协商请求消息, 其 中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整值, 向 第二基站发起移动性参数调整协商过程;
第一基站在移动性参数调整协商请求消息中, 包含目标邻接小区 2到服 务小区 1移动性参数调整值; 还可以包含服务小区 1到目标邻接小区 2的移 动性参数请求值, 服务小区 1到目标邻接小区 2的移动性参数调整值; 目标 部接小区 2到服务小区 1移动性参数请求值中的一项或多项。
其中, 所述移动性参数协商为所述切换协商时, 所述移动性参数为切换 参数; 所述移动性参数协商为所述小区重选协商时, 所述移动性参数为小区 重选参数。
所述负荷信息可以是小区负荷的高、 中、 低的指示信息; 也可以是小区 不同负荷区间的指示, 例如负荷区间可以分成 5段, 用 1-5来指示不同的负 荷区间; 还可以是具体的负荷值。 为所述服务小区 1当前的负荷信息。
可选地, 所述移动性参数调整协商请求消息, 携带所述服务小区 1的部 署特性信息。 所述服务小区 1 的部署特性信息可以包含但不限于服务小区 1 的小区类型、 服务小区 1和目标邻接小区 2的覆盖关系、 服务小区 1的部署 目的、 服务小区 1的主覆盖小区等信息一项或几项。 所述小区类型可以是大 小区、 中小区、 小小区等分类; 所述服务小区 1和目标邻接小区 2的覆盖关 系包含同覆盖、 包含、 被包含等关系; 所述服务小区 1的部署目的是指覆盖 补偿、 容量增强、 热点小区、 数据分流等部署目的。 服务小区 1的主覆盖小 区, 是指为服务小区 1的区域提供基础覆盖的小区标识信息。
步骤 303 , 第二基站收到该移动性参数调整协商请求消息后, 判断是否 可以接受该移动性参数协商;
第二基站可以根据目标小区 2的信息、 服务小区 1的信息等内容判断是 否可以接受该移动性参数协商, 例如可以考虑服务小区 1的部署目的、 负荷 信息、 服务小区 1和目标小区 2的覆盖关系、 服务小区 1的主覆盖小区等信 息中的若干项, 判断是否接受该移动性参数调整的请求。 例如服务小区 1的 负荷比较高, 则可以接受更大范围的移动性参数调整, 即可以接受服务小区 1的更大的切换边界, 使得更多的用户切换到目标小区 2中。 目标小区 2的信息、 服务小区 1的信息, 可以包含小区的负荷信息, 目 标小区和服务小区 1的类型、 服务小区 1和目标邻接小区 2的覆盖关系、 目 标小区和服务小区 1的部署目的、 服务小区 1的主覆盖小区等信息。
步骤 304, 第二基站向第一基站反馈移动性参数调整协商响应消息。 该移动性参数调整协商响应消息携带目标邻接小区 2和服务小区 1的标 识信息, 还可以含有服务小区 1的负荷指示信息。 第一基站在收到移动性参 数调整协商响应消息后, 可以调整服务小区 1到目标邻接小区 2的移动性参 数, 提高切换性能, 或者执行小区间的负荷均衡。
第二基站如果不接受协商则第二基站向第一基站返回表示移动性参数调 整协商失败的响应消息, 向第一基站表示不接受第一基站发起的移动性参数 调整协商过程; 结束。
其中, 第二基站可以在该移动性参数调整协商失败消息中携带目标邻接 小区 2到服务小区 1的移动性参数当前值和 /或可接受的目标邻接小区 2到服 务小区 1的移动性参数调整范围; 其中该可接受的目标邻接小区 2到服务小 区 1的移动性参数调整范围以及可接受的服务小区 1到邻接小区的移动性参 数调整范围, 可以根据运行管理与维护 ( Operations Administration And Maintenance, OAM )配置或者其它优化场景给出; 第一基站在收到该移动性 参数调整协商失败消息后, 根据其中的邻接小区到服务小区 1的移动性参数 当前值和 /或可接受的邻接小区到服务小区 1的移动性参数调整范围, 判断是 否返回步骤 302重新发起移动性参数调整协商过程。
可选地, 第二基站向第一基站返回移动性参数调整协商失败消息时, 该 移动性参数调整协商失败消息中可以携带等待时间; 第一基站在收到该移动 性参数调整协商失败消息后,在至少等待该等待时间之后,可以返回步骤 301 继续执行。
在移动性参数的协商过程中, 如果协商不成功, 且第二基站返回的失败 消息里没带允许的范围, 则需要根据第一基站的需求不断的进行协商尝试。 如果协商失败消息携带了允许的范围, 则第一基站可能要协调到其它基站的 协商范围或增加协商的基站, 再和第二基站重新协商。 因此, 如果首次协商 不成功导致整个完成协商过程消耗的时间加长, 这种延时对于高负荷的小区 影响也比较大, 因为会影响到基站间的切换行为。
在小区密集部署的情况下, 例如一个宏小区会存在数量非常多的小小区 的邻区。 在小小区的负荷变化比较快的情况下, 例如小小区作为热点覆盖, 那么小小区需要频繁的调整移动性参数来进行负荷均衡, 也就需要频繁和宏 小区及周围小小区进行移动性参数的协商。 因此, 在整个网络中会产生数量 巨大的移动性参数协商过程, 协商过程的耗时会影响到实际实时的 UE移动 性, 数量巨大的协商次数也会对网络的信令产生很大冲击。
下述实施例三对上述问题提出了具体的解决方案。
实施例三:
如图 4所示, 本发明实施例三的移动性参数协商方法包括如下步骤: 步骤 401 , 第一基站生成协商的移动性参数;
第一基站根据小区负荷、 小区部署目的等信息, 决定调整本服务小区 1 到第二基站所辖的邻接小区 2的移动性参数, 并根据调整需求并生成目标邻 接小区 2到服务小区 1移动性参数请求值,或者目标邻接小区 2到服务小区 1 移动性参数调整值。 或者还可以生成服务小区 1到目标邻接小区 2的移动性 参数请求值, 或者服务小区 1到目标邻接小区 2的移动性参数调整值;
其中, 该服务小区 1到目标邻接小区 2的移动性参数请求值表示服务小 区 1所期望的调整后的服务小区 1到目标邻接小区 2的移动性参数配置结果, 即该服务小区 1到目标邻接小区 2的移动性门限(包含切换门限或小区重选 门限) ; 该服务小区 1到目标邻接小区 2的移动性参数调整值, 是指该移动 性参数值的变化量; 目标邻接小区 2到服务小区 1移动性参数请求值, 是指 第一基站建议第二基站调整到的目标邻接小区 2到服务小区 1的移动性门限; 目标邻接小区 2到服务小区 1移动性参数调整值是指第一基站建议第二基站 对目标邻接小区 2到服务小区 1的移动性门限的该变量。 所述请求调整的移 动性参数组合, 定义为一套移动性协商参数。 第一基站可以根据不同的负荷 区间指示, 生成不同的移动性协商参数。 例如 4巴月良务小区的负荷区间可以分 成 5段, 则可以生成 5套移动性协商参数, 也可以生成 3套移动性协商参数, 即多个不同的负荷区间可以对应一套移动性协商参数。 步骤 402 , 第一基站向第二基站发送移动性参数调整协商请求消息, 其 中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的移 动性参数调整值, 以向第二基站发起移动性参数调整协商过程;
第一基站在移动性参数调整协商请求消息中, 包含目标邻接小区 2到服 务小区 1移动性参数调整值; 还可以包含服务小区 1到目标邻接小区 2的移 动性参数请求值, 服务小区 1到目标邻接小区 2的移动性参数调整值; 目标 邻接小区 2到服务小区 1移动性参数请求值中的一项或多项。 所述请求调整 的移动性参数组合,定义为一套移动性协商参数(也称为移动性参数调整值)。 每套参数可以设置一个标识, 即移动性协商参数标识。
其中, 所述移动性参数协商为所述切换协商时, 所述移动性参数为切换 参数; 所述移动性参数协商为所述小区重选协商时, 所述移动性参数为小区 重选参数。
所述负荷信息可以是小区负荷的高、 中、 低的指示信息; 也可以是小区 不同负荷区间的指示, 例如负荷区间可以分成 5段, 用 1-5来指示不同的负 荷区间; 还可以是具体的负荷值。
可选地, 所述移动性参数调整协商请求消息, 携带所述服务小区 1的部 署特性信息。 所述月良务小区 1的部署特性信息可以包含月良务小区 1的类型、 服务小区 1和目标邻接小区 2的覆盖关系、 服务小区 1的部署目的、 服务小 区 1的主覆盖小区等信息一项或几项。 所述小区类型可以是大小区、 中小区、 小小区等分类; 所述服务小区 1和目标邻接小区 2的覆盖关系包含同覆盖、 包含、 被包含等关系; 所述小区的部署目的是指覆盖补偿、 容量增强、 热点 小区、 数据分流等部署目的。 服务小区 1 的主覆盖小区, 是指为服务小区 1 的区域提供基础覆盖的小区标识信息。
步骤 403 , 第二基站收到该移动性参数调整协商请求消息后, 判断是否 可以接受该移动性参数协商;
第二基站可以根据目标小区的信息、 服务小区 1的信息等内容判断是否 可以接受该移动性参数协商, 也即是否接受全部移动性参数的调整; 目标小 区的信息、 服务小区 1 的信息, 可以包含小区的负荷信息, 目标邻接小区 2 和服务小区 1的类型、 服务小区 1和目标邻接小区 2的覆盖关系、 目标邻接 小区 2和服务小区 1的部署目的、 服务小区 1的主覆盖小区等信息。 例如, 服务小区 1是小小区, 并且被目标邻接小区 2所覆盖, 提供容量增强的功能, 则第二基站可以考虑在服务小区 1的不同负荷区间时, 可以接受的移动性参 数的调整, 第二基站判断的依据可以是保证小小区 1可以提供一定的容量, 并且在负荷比较高时, 可以通过修改切换参数, 实现负荷到小区 2的均衡。
步骤 404, 第二基站向第一基站反馈移动性参数调整协商响应消息; 第二基站接受全部移动性参数的调整时, 该移动性参数调整协商响应消 息携带邻接小区和服务小区 1 的标识信息, 其中该可接受的目标邻接小区 2 到服务小区 1的移动性参数调整范围以及可接受的服务小区 1到邻接小区的 移动性参数调整范围, 可以根据运行管理与维护 ( Operations Administration And Maintenance, OAM ) 配置或者其它优化场景给出;
第二基站不接受全部移动性参数的调整时, 第二基站向第一基站返回表 示移动性参数调整协商失败的响应消息, 其中, 在该消息中第二基站可以包 含接受协商的移动性协商参数标识。
对于不可接受协商的移动性协商参数, 第二基站可以在该移动性参数调 整协商失败消息中携带移动性协商参数标识, 还可以包含对应该负荷指示的 目标邻接小区 2到服务小区 1的移动性参数当前值和 /或可接受的目标邻接小 区 2到服务小区 1的移动性参数调整范围;
第一基站在收到表示该移动性参数调整协商失败的响应消息后, 判断是 否返回步骤 401重新发起移动性参数调整协商过程;
第一基站根据其中的邻接小区到服务小区 1的移动性参数当前值和 /或可 接受的邻接小区到服务小区 1 的移动性参数调整范围, 判断是否返回步骤 S310重新发起移动性参数调整协商过程。
可选地, 第二基站向第一基站返回移动性参数调整协商失败消息时, 该 移动性参数调整协商失败消息中可以携带等待时间; 第一基站在收到该移动 性参数调整协商失败消息后,在至少等待该等待时间之后,可以返回步骤 401 继续执行。
步骤 405 , 服务小区 1 的负荷信息发生变化时, 第一基站指示目标小区 釆用当前负荷信息对应的移动性协商参数;
例如从区间 1变化到了区间 2, 第一基站可以发送消息 1到第二基站, 指示目标小区釆用区间 2对应的移动性协商参数。 消息 1中可以含有服务小 区 1的负荷区间指示或移动性协商参数标识, 服务小区 1和目标邻接小区 2 的标识等信息。
步骤 406, 第二基站根据指示启用对应的移动性协商参数。
第二基站收到消息 1 , 启用该负荷区间指示或移动性协商参数标识对应 的目标邻接小区 2到服务小区 1的移动性参数。
从而可以在小区间平滑的实现负荷均衡, 而不用频繁的进行移动性参数 协商。
需要说明的是, 第一基站可能向多个第二基站发起了协商过程, 收到了 多个协商响应, 第一基站可能只会对其中几个第二基站进行再次协商, 并发 送移动性参数调整指示消息。
前述实施例一至三中, 移动性参数调整协商过程可以用来协商切换参数 和小区重选参数。 当移动性参数调整协商过程只用来协商切换参数时, 其中 的移动性参数就是切换参数; 当移动性参数调整协商过程只用来协商小区重 选参数时, 其中的移动性参数就是小区重选参数。 其中服务小区到邻接小区 的切换参数, 是指服务小区到邻接小区的切换事件的判决参数, 含有邻接小 区的小区个体偏移( CIO )和频率偏移( frequency specific offset ) , 可选地还 可含有移动性事件的迟滞(Hysteresis )参数等。 同理, 邻接小区到服务小区 的切换参数与此相对应。 例如 A3事件:
A3事件的参数描述如下:
其中:
Mn, 是部接小区的测量结果;
0&, 是部接小区的频率偏移;
Ocn, 是部接小区的小区个体偏移; Hys, 是 A3事件的迟滞参数;
Ms, 是月良务小区的测量结果;
Ofs, 是 Λ良务小区频率偏移;
Ocs, 是服务小区的小区个体偏移;
Off, 是 A3事件的偏移参数。
小区重选参数主要包括服务小区和邻区间的偏置 (Qoffsets,n ) 以及同一 频率优先级的频率偏置 ( Qoffsetfrequency ) , 可选地, 还可以包括重选时等 级排序的迟滞值(Qhyst )。 同理, 邻接小区到服务小区的小区重选参数与此 相对应。 移动性参数调整值是指服务小区和邻区的切换事件判决中的总偏置 的改变值, 或者是指小区重选判决中的服务小区和邻区的总偏置的改变值。
本发明实施例的技术方案移动性参数调整协商过程中的消息,可以是 X2 接口的独立消息, 也可以是 S1接口的独立消息,还可以是其他相关技术中已 有的消息, 也即通过比如基站配置传输消息 ( eNB CONFIGURATION TRANSFER ) 和移动管理单元配置传输消息 ( MME CONFIGURATION TRANSFER )等来传输移动性参数协商过程中的交互信息。
可选地, 第一基站所辖的服务小区到第二基站的所辖邻接小区的移动性 参数调整协商过程, 可由一定的事件, 比如进行负荷均衡优化或者移动性优 化导致的移动性参数调整等事件。
本发明实施例技术方案中的移动性参数调整协商, 通过基站间的消息交 互来实现。 基站间存在 X2接口的情况下, 可以通过 X2接口的接口消息来交 互; 基站间不存在 X2接口的情况下, 可以通过 S1接口的接口消息来交互。
为了实现上述方法实施例, 本发明实施例还提供了一种基站, 如图 5所 示, 该基站作为第一基站时, 包括请求发送模块 501、 响应接收模块 502、 : 请求发送模块 501设置成: 向第二基站发送移动性参数调整协商请求消 息, 其中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整 值;
响应接收模块 502设置成: 接收所述第二基站发送的移动性参数调整协 商响应消息, 其中携带所述移动性参数调整协商结果信息; 该基站作为第二基站时, 包括请求接收模块 503和响应发送模块 504, 其中:
请求接收模块 503设置成: 接收所述第一基站发送的所述移动性参数调 整协商请求消息;
响应发送模块 504设置成: 向所述第一基站发送的所述移动性参数调整 协商响应消息。
可选地, 所述负荷信息是以下至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
可选地, 所述移动性参数调整协调请求消息还携带所述服务小区的部署 特性信息, 所述服务小区的部署特性信息包括以下至少一项: 服务小区的类 型、 服务小区和目标邻接小区的覆盖关系、 服务小区的部署目的、 服务小区 的主覆盖小区。
可选地, 所述移动性参数调整协商请求消息中携带所述服务小区的多个 负荷信息以及与所述多个负荷信息分别对应的移动性参数调整值。
可选地, 如图 6所示, 所述实施例的基站还包括: 参数调整模块 601 , 参数调整模块 601设置成: 根据服务小区当前负荷信息对应的移动性参数调 整协商结果调整移动性参数, 并通知所述第二基站, 此时所述基站作为方法 实施例中的第一基站; 参数调整模块 601设置成: 根据第一基站的通知启用 对应的移动性协商参数, 此时所述基站作为方法实施例中的第二基站。
本发明实施例移动性参数协商方法及基站, 在移动性参数调整协商请求 消息中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整值 以提高协商过程的效率, 另外, 本发明实施例在动性参数调整协商请求消息 中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的移 动性参数调整值, 可减少网络中协商次数, 减轻由于协商过程带来对网络中 信令的冲击, 从而提高了整个网络的性能。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 或 者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软 件结合。
虽然本发明所揭露的实施方式如上, 但所述的内容只是为了便于理解本 发明而釆用的实施方式, 并非用以限定本发明。 任何本发明所属技术领域内 的技术人员, 在不脱离本发明所揭露的精神和范围的前提下, 可以在实施的 形式上及细节上作任何的调整与变化, 但本发明的专利保护范围, 仍须以所 附的权利要求书所界定的范围为准。
工业实用性 本发明实施例的移动性参数协商方法及基站, 在移动性参数调整协商请 求消息中携带服务小区的负荷信息以及与该负荷信息对应的移动性参数调整 值以提高协商过程的效率, 另外, 本发明实施例在动性参数调整协商请求消 息中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的 移动性参数调整值, 可减少网络中协商次数, 减轻由于协商过程带来对网络 中信令的冲击, 从而提高了整个网络的性能。 因此本发明具有很强的工业实 用性。

Claims

权 利 要 求 书
1、 一种移动性参数协商方法, 该方法包括:
第一基站向第二基站发送移动性参数调整协商请求消息, 所述移动性参 数调整协商请求消息中携带服务小区的负荷信息以及与该负荷信息对应的移 动性参数调整值;
所述第二基站向所述第一基站发送移动性参数调整协商响应消息, 所述 移动性参数调整协商响应消息中携带所述移动性参数调整协商结果信息; 所述第一基站接收所述第二基站发送的所述移动性参数调整协商响应消 息。
2、 如权利要求 1所述的移动性参数协商方法, 其中, 所述负荷信息是以 下信息中的至少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
3、 如权利要求 1所述的移动性参数协商方法, 其中: 所述移动性参数调 整协调请求消息还携带有所述服务小区的部署特性信息 , 所述服务小区的部 署特性信息包括以下信息中的至少一个: 服务小区的类型、 服务小区和目标 邻接小区的覆盖关系、 服务小区的部署目的、 服务小区的主覆盖小区。
4、 如权利要求 1所述的移动性参数协商方法, 其中: 所述移动性参数调 整协商请求消息中携带所述服务小区的多个负荷信息以及与所述多个负荷信 息分别对应的移动性参数调整值。
5、 如权利要求 1或 4所述的移动性参数协商方法, 其中, 所述第一基站 接收所述第二基站发送的接收移动性参数调整协商响应消息后, 该方法还包 括: 所述第一基站根据服务小区当前负荷信息对应的移动性参数调整协商结 果调整移动性参数, 并通知所述第二基站。
6、 一种基站, 包括请求发送模块和响应接收模块, 其中: 所述请求发送模块设置成: 向其他基站发送移动性参数调整协商请求消 息, 所述移动性参数调整协商请求消息中携带服务小区的负荷信息以及与该 负荷信息对应的移动性参数调整值;
所述响应接收模块设置成: 接收其他所述基站发送的移动性参数调整协 商响应消息, 所述移动性参数调整协商响应消息中携带移动性参数调整协商 结果信息。
7、 如权利要求 6所述的基站, 该基站还包括: 请求接收模块和响应发送 模块, 其中:
所述请求接收模块设置成: 接收其他基站发送的所述移动性参数调整协 商请求消息;
所述响应发送模块设置成: 向发送所述移动性参数调整协商请求消息的 基站发送所述移动性参数调整协商响应消息。
8、 如权利要求 6所述的基站, 其中, 所述负荷信息是以下信息中的至少 一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
9、 如权利要求 6所述的基站, 其中: 所述移动性参数调整协调请求消息 还携带所述服务小区的部署特性信息 , 所述服务小区的部署特性信息包括以 下信息中的至少一个: 服务小区的类型、 服务小区和目标邻接小区的覆盖关 系、 服务小区的部署目的、 服务小区的主覆盖小区。
10、 如权利要求 6所述的基站, 其中: 所述移动性参数调整协商请求消 息中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的 移动性参数调整值。
11、 如权利要求 6所述的基站, 所述基站还包括: 参数调整模块, 其中: 所述参数调整模块设置成: 根据服务小区当前负荷信息对应的移动性参 数调整协商结果调整移动性参数, 并通知其他所述基站。
12、 如权利要求 7所述的基站, 所述基站还包括: 参数调整模块, 其中: 所述参数调整模块设置成: 根据其他基站的通知启用与所述通知对应的 移动性协商参数。
13、 一种基站, 包括请求接收模块和响应发送模块, 其中:
所述请求接收模块设置成: 接收其他基站发送的移动性参数调整协商请 求消息, 所述移动性参数调整协商请求消息中携带服务小区的负荷信息以及 与该负荷信息对应的移动性参数调整值;
所述响应发送模块设置成: 向其他所述基站发送移动性参数调整协商响 应消息, 所述移动性参数调整协商响应消息中携带移动性参数调整协商结果 信息。
14、 如权利要求 13所述的基站, 其中, 所述负荷信息是以下信息中的至 少一种:
用于指示负荷高低的指示信息;
或用于指示不同负荷区间的指示信息;
或具体的负荷值。
15、 如权利要求 13所述的基站, 其中: 所述移动性参数调整协调请求消 息还携带所述服务小区的部署特性信息 , 所述服务小区的部署特性信息包括 以下信息中的至少一项: 服务小区的类型、 服务小区和目标邻接小区的覆盖 关系、 服务小区的部署目的、 服务小区的主覆盖小区。
16、 如权利要求 13所述的基站, 其中: 所述移动性参数调整协商请求消 息中携带所述服务小区的多个负荷信息以及与所述多个负荷信息分别对应的 移动性参数调整值。
17、 如权利要求 6或 9所述的基站, 其中, 所述基站还包括: 参数调整 模块, 所述参数调整模块设置成: 根据其他基站的通知启用与所述通知对应 的移动性协商参数。
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