CN104301960A - Community switching method, system and base station - Google Patents
Community switching method, system and base station Download PDFInfo
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- CN104301960A CN104301960A CN201310302736.XA CN201310302736A CN104301960A CN 104301960 A CN104301960 A CN 104301960A CN 201310302736 A CN201310302736 A CN 201310302736A CN 104301960 A CN104301960 A CN 104301960A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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Abstract
本发明公开了一种小区切换方法，该方法包括：源基站对接收到的测量报告中携带的邻小区按照归属的基站进行分组，并对邻小区分组进行优先级排序；所述源基站从优先级最高的邻小区分组中选择一个或多个邻小区作为候选小区，将所述一个或多个候选小区的信息发送给目标基站以实现后续切换；目标基站获取自身小区的无线资源测量结果，按照所述无线资源测量结果从接收到的一个或多个候选小区中确定出负荷最轻的候选小区，并指示所述UE切换到所述负荷最轻的候选小区。本发明同时还公开了一种小区切换系统和基站。采用本发明的技术方案，能够降低小区切换过程中带来的切换时延，降低了小区切换中UE掉话的风险。
The invention discloses a cell handover method, which comprises: a source base station groups neighboring cells carried in a received measurement report according to their belonging base stations, and prioritizes the groups of neighboring cells; Select one or more neighboring cells from the highest-level neighboring cell group as candidate cells, and send the information of the one or more candidate cells to the target base station to achieve subsequent handover; the target base station obtains the radio resource measurement results of its own cell, and performs The radio resource measurement result determines the candidate cell with the lightest load from the received one or more candidate cells, and instructs the UE to switch to the candidate cell with the lightest load. The invention also discloses a cell switching system and a base station. By adopting the technical scheme of the invention, it is possible to reduce the switching time delay brought about in the cell switching process, and reduce the risk of UE call drop in the cell switching process.
Description
Technical Field
The present invention relates to communication technologies, and in particular, to a cell switching method, system, and base station.
Background
The Long Term Evolution (LTE) system performs handover in a network control and User Equipment (UE) assisted manner, and the whole handover process includes three stages of handover preparation, handover execution, and handover completion. The specific switching process is as follows:
in a handover preparation phase, a source evolved node B (eNB, evolved NodeB) sends a Radio Resource Control (RRC) connection reconfiguration message to a UE, receives a measurement report returned by the UE, performs a handover decision based on channel Quality information of a local cell and a neighboring cell carried in the measurement report and Radio Resource management information, selects a final handover candidate cell list, and selects an optimal handover target cell from the candidate cell list, wherein the channel Quality information includes Reference Signal Received Power (RSRP) or Reference Signal Received Quality (RSRQ, Reference Signal Received Quality); and the source eNB sends a switching request to the target eNB, the target eNB carries out admission control, prepares switching resources for the UE and replies a switching request response to the source eNB.
In the switching execution stage, the source eNB sends a switching command generated by the target eNB to the UE to indicate the UE to switch to the target cell; and the source eNB carries out uplink and downlink data back transmission to the target eNB. And the UE successfully accesses the target cell and establishes uplink synchronization, and sends a switching confirmation to the target eNB to carry out a switching completion stage.
In the switching completion phase, the core network element completes the conversion of the downlink path, the target eNB sends the data which is transmitted in advance and newly received in sequence, and meanwhile, the source eNB releases the resources occupied by the UE.
In the existing cell switching method, a switching request can only carry one target cell, if a plurality of candidate cells belong to the same eNB, because the switching process cannot be executed concurrently and can only be carried out serially, the time length of a switching preparation stage is increased, and the risk of UE call drop is increased; meanwhile, in order to select an optimal target cell to guarantee the service quality of the UE in handover decision, load information interaction based on an X2 interface between the target eNB and the source eNB is required, which increases processing complexity and is limited by the fact that an available X2 interface must exist between the source eNB and the target eNB.
Disclosure of Invention
In view of this, the main objective of the present invention is to provide a cell handover method, system and base station, which can reduce handover delay caused in a cell handover process, reduce a risk of UE call drop in the cell handover, and reduce complexity of the handover process.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a cell switching method, which comprises the following steps:
the source base station groups the adjacent cells carried in the received measurement report according to the affiliated base stations and carries out priority sequencing on the adjacent cell groups;
and the source base station selects one or more adjacent cells from the adjacent cell group with the highest priority as candidate cells, and sends the information of the one or more candidate cells to the target base station to realize subsequent handover.
In the foregoing solution, the prioritizing the neighbor cell groups includes:
and carrying out priority sequencing on the adjacent cell groups according to the RSRP and/or the RSRQ in the measurement report, and carrying out priority sequencing on the adjacent cells in each adjacent cell group according to the RSRP and/or the RSRQ.
In the foregoing solution, the selecting one or more neighboring cells from the neighboring cell group with the highest priority as candidate cells and sending information of the candidate cells to the target base station includes:
and the source base station selects one or more adjacent cells as candidate cells from the adjacent cell group with the highest priority in the order of the priority from high to low, and sends the information of the candidate cells to the target base station through a switching request message.
The invention also provides a cell switching method, which comprises the following steps: the target base station obtains a wireless resource measurement result of a cell of the target base station, determines a candidate cell with the lightest load from one or more candidate cells sent by a received source base station according to the wireless resource measurement result, and indicates the UE to switch to the candidate cell with the lightest load.
In the above solution, the obtaining, by the target base station, a radio resource measurement result of the cell itself includes:
the RRC sublayer of the target base station indicates a Media Access Control (MAC) sublayer to measure the wireless resources of the object to be measured;
and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
In the above solution, the instructing, by the target base station, the UE to switch to the candidate cell with the lightest load includes:
the target base station sends a switching request response message to the source base station, wherein the switching request response message carries the candidate cell information with the lightest load;
and the source base station sends the received candidate cell information with the lightest load to the UE through an RRC connection reconfiguration message.
The present invention also provides a base station, wherein the base station is a source base station, and the base station comprises: the device comprises a first receiving module, a grouping module, a sorting selection module and a first sending module; wherein,
the first receiving module is configured to receive a measurement report and send the measurement report to the grouping module and the sorting selection module;
the grouping module is configured to group the neighboring cells carried in the measurement report according to the affiliated base station, and send the neighboring cell groups to the sorting selection module;
the sorting selection module is configured to perform priority sorting on the neighbor cell groups, select one or more neighbor cells from the neighbor cell group with the highest priority as candidate cells, and send information of the candidate cells to the first sending module;
the first sending module is configured to send the information of the one or more candidate cells sent by the sorting selection module to a target base station to implement subsequent handover.
In the foregoing scheme, the sorting selection module is configured to perform priority sorting on the adjacent cell groups according to RSRP and/or RSRQ in the measurement report, and perform priority sorting on the adjacent cells in each adjacent cell group according to RSRP and/or RSRQ.
In the above scheme, the ranking selection module is configured to select one or more neighboring cells as candidate cells from a group of neighboring cells with a highest priority in an order from high to low according to priority;
correspondingly, the first sending module is configured to send information of one or more candidate cells to the target base station through the handover request message.
In the above scheme, the first receiving module is further configured to receive a handover request response message sent by a target base station, where the handover request response message carries information of the candidate cell with the lightest load;
the first sending module is further configured to send the candidate cell information with the lightest load to the UE through an RRC connection reconfiguration message.
The present invention also provides a base station, wherein the base station is a target base station, and the base station comprises: the device comprises an acquisition module, a second receiving module, a determination module and a switching indication module; wherein,
the acquiring module is configured to acquire a radio resource measurement result of a cell of the mobile terminal and send the radio resource measurement result to the determining module;
the second receiving module is configured to receive information of a candidate cell sent by a source base station, and send the information of the candidate cell to the determining module;
the determining module is configured to determine a candidate cell with the lightest load from the candidate cells according to the radio resource measurement result;
the handover indicating module is configured to indicate the UE to handover to the candidate cell with the lightest load.
In the above scheme, the obtaining module is configured to instruct, through a radio resource control RRC sublayer, a media access control MAC sublayer to perform radio resource measurement on an object to be measured; and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
In the foregoing scheme, the handover indication module is configured to send a handover request response message to the source base station, where the handover request response message carries information of the candidate cell with the lightest load.
The invention also provides a cell switching system, which comprises the source base station and the target base station.
According to the cell switching method, the system and the base station, the source base station groups the adjacent cells carried in the received measurement report according to the affiliated base stations, and performs priority sequencing on the adjacent cell groups; selecting one or more adjacent cells from the adjacent cell grouping with the highest priority as candidate cells, and sending the information of the candidate cells to a target base station to realize subsequent switching; the target base station acquires a radio resource measurement result of a cell of the target base station, determines a candidate cell with the lightest load from the received candidate cells according to the radio resource measurement result, and indicates the UE to switch to the candidate cell with the lightest load; therefore, the source base station sends a plurality of candidate cells to the target base station in parallel, and the switching time delay caused by the fact that the target base station can only be sent by the plurality of candidate cells in series in the prior art is reduced; on the other hand, the target base station can select the cell with the optimal quality and the minimum load to perform switching preparation, so that the risk of UE call drop in cell switching is reduced; in addition, in the technical scheme of the invention, the process of exchanging the load information through the X2 interface in the prior art is omitted, and the complexity of the switching process is reduced.
Drawings
FIG. 1 is a flow chart illustrating a cell switching method according to the present invention;
fig. 2 is a flowchart illustrating a cell switching method according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a cell switching method according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for a target base station to obtain radio resource measurement results according to a third embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for a target base station to obtain radio resource measurement results according to a fourth embodiment of the present invention;
FIG. 6 is a schematic diagram of a structure of a base station as a source base station according to the present invention;
fig. 7 is a schematic structural diagram of a target base station as a base station according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic flow chart of a cell handover method of the present invention, as shown in fig. 1, including the following steps:
step 101: the source base station groups the adjacent cells carried in the received measurement report according to the base stations to which the adjacent cells belong;
here, before the source base station receives the measurement report, the step further includes: the source base station sends down an RRC connection reconfiguration message according to the configuration of the background and the capability of the UE; and according to the measurement configuration parameters carried in the RRC reconfiguration message, the UE sends the measurement result to the source base station through a measurement report.
Step 102: carrying out priority sorting on the adjacent cell groups;
here, the source base station prioritizes the adjacent cell groups according to RSRP and/or RSRQ carried by channel quality in the measurement report, and prioritizes the adjacent cells in each adjacent cell group according to the RSRP and/or RSRQ.
Step 103: the source base station selects one or more adjacent cells from the adjacent cell grouping with the highest priority as candidate cells, and sends the information of the one or more candidate cells to the target base station to realize subsequent switching;
here, the source base station selects one or more neighbor cells as candidate cells from a neighbor cell group with the highest priority in order of priority from high to low, and transmits information of the one or more candidate cells to a target base station through a handover request message to form a candidate cell list.
Step 104: the target base station acquires a radio resource measurement result of a cell of the target base station, and determines a candidate cell with the lightest load from the received one or more candidate cells according to the radio resource measurement result;
here, the acquiring, by the target base station, the radio resource measurement result of the own cell includes:
the RRC sublayer of the target base station indicates the MAC sublayer to carry out wireless resource measurement on the object to be measured;
and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
Specifically, a target base station receives a handover request message sent by a source base station, wherein the handover request message carries a candidate cell list;
and the target base station sorts the candidate cells in the candidate cell list according to the acquired wireless resource measurement result of the cell per se, and selects the candidate cell with the lightest load as the target switching cell.
Step 105: instructing the UE to switch to the candidate cell with the lightest load;
here, the target base station selects the candidate cell with the lightest load as a target handover cell for handover preparation, and returns a handover request response message to the source base station when the handover preparation is successful, where the handover request response message carries the target handover cell information and mobility control information, and the target handover cell information is specifically the target handover cell identifier.
Further, the source base station receives a handover request response message sent by the target base station, wherein the handover request response message carries the target handover cell identification information and the mobility control information;
and the source base station sends the received candidate cell information with the lightest load and the mobility control information to the UE through an RRC connection reconfiguration message to indicate the UE to carry out cell switching.
Fig. 2 is a schematic flow chart of a cell switching method according to a first embodiment of the present invention, where the first embodiment is a cell switching method based on an S1 interface, as shown in fig. 2, including the following steps:
step 201 to step 203: the source eNB sends a radio resource control connection reconfiguration message to the UE, receives a radio resource control connection reconfiguration completion message returned by the UE, and receives a measurement report returned by the UE;
here, the source eNB issues measurement configuration parameters to the UE through an RRC connection reconfiguration message, and the UE performs measurement on an execution object according to the measurement configuration parameters and sends a measurement report to the source eNB after a reporting condition is satisfied.
Step 204: the source eNB filters adjacent cells in an adjacent cell list carried by a measurement report, groups the adjacent cells according to a home base station, performs priority sequencing on the adjacent cell groups according to a measurement result, and selects one or more adjacent cells in the adjacent cell group with the highest priority as candidate cells;
here, the source eNB filters the neighboring cells in the neighboring cell list carried in the measurement report, filters out the neighboring cells that are not supported, groups the neighboring cells according to the home base station, prioritizes the neighboring cell groups according to RSRP and/or RSRQ carried in channel quality in the measurement result, prioritizes the neighboring cells in each neighboring cell group according to the RSRP and/or RSRQ, and selects one or more neighboring cells in the neighboring cell group with the highest priority as candidate cells.
Step 205 to step 206: a source eNB sends a switching request message to a target eNB through a core network element Mobility Management Entity (MME);
here, the handover request message carries a candidate cell list, and is sent to the target eNB through the MME, where the candidate cell list includes the one or more candidate cells.
Step 207: the target eNB acquires a wireless resource measurement result, sorts a candidate cell list carried in the switching request message according to the measurement result, and selects a candidate cell with the lightest load as a target switching cell for switching preparation;
here, the RRC sublayer of the target base station instructs the MAC sublayer to perform radio resource measurement on the object to be measured;
and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
Step 208: the target eNB sends a switching request response message to the MME;
here, after the handover preparation of the target eNB is successful, a handover request response message is sent to the MME, where the handover request response message carries a target handover cell identifier and mobility control information.
Step 209 to step 210: the MME sends a switching command message to a source eNB, and the source eNB forwards the switching command message to the UE;
here, the source eNB forwards the handover command message to the UE through an RRC connection reconfiguration message; the handover command message carries a target handover cell identifier and mobility control information.
Step 211: performing uplink and downlink data reverse transmission between the source eNB and the target eNB;
here, the source eNB sends the uplink and downlink data of the UE to the target eNB, and the target eNB sends the downlink data to the UE through an air interface, so that the data is not lost during the cell handover of the UE.
Step 212: UE sends switching confirmation message to target eNB;
here, after synchronizing to the target handover cell, the UE transmits a handover confirm message to the target eNB through an RRC connection reconfiguration complete message.
Step 213: and the target eNB sends a switching notification message to the MME to notify the MME that the cell switching is completed.
Step 214 to step 215: the MME sends a UE context release command message to the source eNB and receives a UE context release completion message returned by the source eNB;
here, the MME sends a UE context release command message to the source eNB to release resources, UE context information, and the like on the source eNB side, and after the release is completed, returns a UE context release completion message to the MME.
Fig. 3 is a schematic flow chart of a cell switching method according to a second embodiment of the present invention, where the second embodiment is a cell switching method based on an X2 interface, as shown in fig. 3, including the following steps:
step 301 to step 303: the source eNB sends a radio resource control connection reconfiguration message to the UE, receives a radio resource control connection reconfiguration completion message returned by the UE, and receives a measurement report returned by the UE;
here, the source eNB issues measurement configuration parameters to the UE through an RRC connection reconfiguration message, and the UE performs measurement on an execution object according to the measurement configuration parameters and sends a measurement report to the source eNB after a reporting condition is satisfied.
Step 304: the source eNB filters adjacent cells in an adjacent cell list carried by a measurement report, groups the adjacent cells according to a home base station, performs priority sequencing on the adjacent cell groups according to a measurement result, and selects one or more adjacent cells in the adjacent cell group with the highest priority as candidate cells;
here, the source eNB filters the neighboring cells in the neighboring cell list carried in the measurement report, filters out the neighboring cells that are not supported, groups the neighboring cells according to the home base station, prioritizes the neighboring cell groups according to RSRP and/or RSRQ carried in channel quality in the measurement result, prioritizes the neighboring cells in each neighboring cell group according to the RSRP and/or RSRQ, and selects one or more neighboring cells in the neighboring cell group with the highest priority as candidate cells.
Step 305: a source eNB sends a switching request message to a target eNB;
here, the handover request message carries a candidate cell list, and the candidate cell list includes the one or more candidate cells.
Step 306: the target eNB acquires a wireless resource measurement result, sorts a candidate cell list carried in the switching request message according to the measurement result, and selects a candidate cell with the lightest load as a target switching cell for switching preparation;
here, the RRC sublayer of the target base station instructs the MAC sublayer to perform radio resource measurement on the object to be measured;
and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
Step 307: the target eNB sends a switching request response message to the source eNB;
here, after the handover preparation of the target eNB is successful, a handover request response message is sent to the source eNB, where the handover request response message carries a target handover cell identifier and mobility control information.
Step 308: the source eNB sends a switching command message to the UE;
here, the source eNB transmits the handover command message to the UE through an RRC connection reconfiguration message; the handover command message carries a target handover cell identifier and mobility control information.
Step 309: uplink and downlink data are reversely transmitted between the source eNB and the target eNB;
here, the source eNB sends the uplink and downlink data of the UE to the target eNB, and the target eNB sends the downlink data to the UE through an air interface, so that the UE does not lose data during cell handover.
Step 310: UE sends switching confirmation message to target eNB;
here, after synchronizing to the target handover cell, the UE transmits a handover confirm message to the target eNB through an RRC connection reconfiguration complete message.
Step 311 to step 312: and the target eNB sends a path switching request message to the MME and receives a path switching request response message returned by the MME.
Step 313: the target eNB sends a UE context release message to the source eNB;
here, the destination eNB transmits a UE context release command message to the source eNB to release resources, UE context information, and the like on the source eNB side.
Fig. 4 is a flowchart illustrating a method for acquiring a radio resource measurement result by a target base station according to a third embodiment of the present invention, as shown in fig. 4, including the following steps:
step 401 to step 402: the RRC sublayer sends a radio resource measurement request message to the MAC sublayer and receives a radio resource measurement request response message returned by the MAC sublayer;
here, the RRC sublayer of the target eNB sends a radio Resource measurement request message to the MAC sublayer, where the radio Resource measurement request message carries an object of radio Resource measurement, including a Physical Resource Block (PRB) utilization rate and a measurement period.
Step 403: the MAC sublayer sends a radio resource measurement result to the RRC sublayer;
here, the MAC sublayer starts to measure a corresponding measurement object according to the object carrying the radio resource measurement in the radio resource measurement request message, and periodically reports the measurement result of the radio resource measurement to the RRC sublayer according to the measurement period carried in the measurement report.
Fig. 5 is a flowchart illustrating a method for acquiring a radio resource measurement result by a target base station according to a fourth embodiment of the present invention, as shown in fig. 5, including the following steps:
step 501: the RRC sublayer sends a radio resource measurement indication message to the MAC sublayer;
here, the RRC sublayer of the target eNB decides that radio resource measurement needs to be performed, and sends a radio resource measurement indication message to the MAC sublayer, where the radio resource measurement indication message is used to indicate "start" of a radio resource measurement operation of the MAC sublayer, and the radio resource measurement request message carries an object of radio resource resources, including PRB utilization and the like.
Step 502: the RRC sublayer sends a wireless source measurement request message to the MAC sublayer, wherein the wireless resource measurement request message is used for requesting the MAC to send a measurement result of wireless resource measurement.
Step 503: the MAC sublayer returns the radio resource measurement result to the RRC sublayer.
Step 504: the RRC sublayer sends a radio resource measurement indication message to the MAC sublayer;
here, the RRC sublayer receives the radio resource measurement result, decides that radio resource measurement needs to be stopped, and sends a radio resource measurement indication message to the MAC sublayer, which is used to indicate the MAC sublayer that the radio resource measurement operation is "stopped".
Based on the above method, the present invention further describes a base station, which is used as a source base station, as shown in fig. 6, the source base station 60 includes: a first receiving module 61, a grouping module 62, an ordering selection module 63 and a first sending module 64; wherein,
the first receiving module 61 is configured to receive a measurement report, and send the measurement report to the grouping module and the sorting selection module 63;
the grouping module 62 is configured to group the neighboring cells carried in the measurement report according to the affiliated base station, and send the neighboring cell groups to the sorting selection module 63;
the sorting selection module 63 is configured to perform priority sorting on the adjacent cell groups, select one or more adjacent cells from the adjacent cell group with the highest priority as candidate cells, and send information of the candidate cells to the first sending module 64;
the first sending module 64 is configured to send the information of the one or more candidate cells sent by the sorting selection module 63 to the target base station to implement subsequent handover.
Further, the sorting selection module 63 is configured to prioritize the adjacent cell groups according to RSRP and/or RSRQ in the measurement report, and prioritize the adjacent cells in each adjacent cell group according to RSRP and/or RSRQ.
Further, the sorting selection module 63 is configured to select one or more neighboring cells as candidate cells from a neighboring cell group with the highest priority in an order from high to low according to priority;
correspondingly, the first sending module 64 is configured to send information of one or more candidate cells to the target base station through a handover request message.
Further, the first receiving module 61 is further configured to receive a handover request response message sent by a target base station, where the handover request response message carries the information of the candidate cell with the lightest load;
the first sending module 64 is further configured to send the candidate cell information with the lightest load to the UE through an RRC connection reconfiguration message.
The present invention further describes a base station, which is a target base station, as shown in fig. 7, the target base station 70 includes: an acquisition module 71, a second receiving module 72, a determination module 73 and a switching indication module 74; wherein,
the acquiring module 71 is configured to acquire a radio resource measurement result of a cell of the cell, and send the radio resource measurement result to the determining module 73;
the second receiving module 72 is configured to receive information of a candidate cell sent by a source base station, and send the information of the candidate cell to the determining module 73;
the determining module 73 is configured to determine, according to the radio resource measurement result, a candidate cell with a lightest load from the candidate cells;
the handover instructing module 74 is configured to instruct the UE to handover to a candidate cell with the lightest load among the candidate cells.
Further, the obtaining module 71 is configured to instruct, through the radio resource control RRC sublayer, the media access control MAC sublayer to perform radio resource measurement on the object to be measured; and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
Further, the handover instructing module 74 is configured to send a handover request response message to the source base station, where the handover request response message carries the information of the candidate cell with the lightest load.
The present invention also describes a cell switching system, which includes the source base station 60 shown in fig. 6 and the target base station 70 shown in fig. 7. The cell switching system of the embodiment of the present invention has the same structure as the existing network, except that the functions executed by the source base station and the target base station are different from the functions of the base station in the existing network, and specific functions are different as described above, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent, and improvement made within the spirit and scope of the present invention shall fall within the protection scope of the present invention.
Claims (14)
1. A method of cell handover, the method comprising:
the source base station groups the adjacent cells carried in the received measurement report according to the affiliated base stations and carries out priority sequencing on the adjacent cell groups;
and the source base station selects one or more adjacent cells from the adjacent cell group with the highest priority as candidate cells, and sends the information of the one or more candidate cells to the target base station to realize subsequent handover.
2. The method of claim 1, wherein prioritizing the neighbor cell groupings comprises:
and performing priority ranking on the adjacent cell groups according to the Reference Signal Received Power (RSRP) and/or the Reference Signal Received Quality (RSRQ) in the measurement report, and performing priority ranking on the adjacent cells in each adjacent cell group according to the RSRP and/or the RSRQ.
3. The method of claim 2, wherein the selecting one or more neighbor cells from the neighbor cell group with the highest priority as candidate cells and sending information of the candidate cells to a target base station comprises:
and the source base station selects one or more adjacent cells as candidate cells from the adjacent cell group with the highest priority in the order of the priority from high to low, and sends the information of the candidate cells to the target base station through a switching request message.
4. A method of cell handover, the method comprising:
the target base station obtains a wireless resource measurement result of a cell of the target base station, determines a candidate cell with the lightest load from one or more candidate cells sent by a received source base station according to the wireless resource measurement result, and indicates the UE to switch to the candidate cell with the lightest load.
5. The method of claim 4, wherein the obtaining, by the target base station, the radio resource measurement result of the own cell comprises:
the radio resource control RRC sublayer of the target base station indicates the media access control MAC sublayer to carry out radio resource measurement on the object to be measured;
and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
6. The method of claim 4, wherein the target base station instructs the UE to handover to the candidate cell with the lightest load, comprising:
the target base station sends a switching request response message to the source base station, wherein the switching request response message carries the candidate cell information with the lightest load;
and the source base station sends the received candidate cell information with the lightest load to the UE through an RRC connection reconfiguration message.
7. A base station, the base station being a source base station, the base station comprising: the device comprises a first receiving module, a grouping module, a sorting selection module and a first sending module; wherein,
the first receiving module is configured to receive a measurement report and send the measurement report to the grouping module and the sorting selection module;
the grouping module is configured to group the neighboring cells carried in the measurement report according to the affiliated base station, and send the neighboring cell groups to the sorting selection module;
the sorting selection module is configured to perform priority sorting on the neighbor cell groups, select one or more neighbor cells from the neighbor cell group with the highest priority as candidate cells, and send information of the candidate cells to the first sending module;
the first sending module is configured to send the information of the one or more candidate cells sent by the sorting selection module to a target base station to implement subsequent handover.
8. The base station of claim 7, wherein the ranking selection module is configured to prioritize the groups of neighbor cells according to RSRP and/or RSRQ in the measurement report, and to prioritize the neighbor cells in each of the groups of neighbor cells according to RSRP and/or RSRQ.
9. The base station according to claim 8, wherein the ranking selecting module is configured to select one or more neighbor cells as candidate cells from the neighbor cell group with the highest priority in order from high to low;
correspondingly, the first sending module is configured to send information of one or more candidate cells to the target base station through the handover request message.
10. The base station of claim 7, wherein the first receiving module is further configured to receive a handover request response message sent by a target base station, where the handover request response message carries information of the candidate cell with the lightest load;
the first sending module is further configured to send the candidate cell information with the lightest load to the UE through an RRC connection reconfiguration message.
11. A base station, the base station being a target base station, the base station comprising: the device comprises an acquisition module, a second receiving module, a determination module and a switching indication module; wherein,
the acquiring module is configured to acquire a radio resource measurement result of a cell of the mobile terminal and send the radio resource measurement result to the determining module;
the second receiving module is configured to receive information of a candidate cell sent by a source base station, and send the information of the candidate cell to the determining module;
the determining module is configured to determine a candidate cell with the lightest load from the candidate cells according to the radio resource measurement result;
the handover indicating module is configured to indicate the UE to handover to the candidate cell with the lightest load.
12. The base station of claim 11, wherein the obtaining module is configured to instruct, through a radio resource control RRC sublayer, a media access control MAC sublayer to perform radio resource measurement on an object to be measured; and the MAC sublayer performs radio resource measurement on the object to be measured and returns a radio resource measurement result to the RRC sublayer.
13. The base station of claim 11, wherein the handover indication module is configured to send a handover request response message to a source base station, where the handover request response message carries the information of the candidate cell with the lightest load.
14. A cell handover system, characterised in that the system comprises a source base station according to claims 7 to 10 and a target base station according to claims 11 to 13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310302736.XA CN104301960A (en) | 2013-07-18 | 2013-07-18 | Community switching method, system and base station |
| PCT/CN2014/078574 WO2014166456A2 (en) | 2013-07-18 | 2014-05-27 | Cell handoff method, system, base station and computer storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310302736.XA CN104301960A (en) | 2013-07-18 | 2013-07-18 | Community switching method, system and base station |
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| CN104301960A true CN104301960A (en) | 2015-01-21 |
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| CN201310302736.XA Withdrawn CN104301960A (en) | 2013-07-18 | 2013-07-18 | Community switching method, system and base station |
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| WO (1) | WO2014166456A2 (en) |
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| Publication number | Publication date |
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| WO2014166456A2 (en) | 2014-10-16 |
| WO2014166456A3 (en) | 2014-12-04 |
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