CN102325353B - Method, equipment and system for selecting target cell during handover - Google Patents
Method, equipment and system for selecting target cell during handover Download PDFInfo
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- CN102325353B CN102325353B CN201110198666.9A CN201110198666A CN102325353B CN 102325353 B CN102325353 B CN 102325353B CN 201110198666 A CN201110198666 A CN 201110198666A CN 102325353 B CN102325353 B CN 102325353B
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Abstract
The invention provides a method for selecting a target cell during handover. The target cell is selected according to the load and the signal quality of neighbor cells, the handover is not conducted according to an artificially set target cell and the quality of cell handover is improved. The method comprises the steps of: obtaining the reference signal received power (RSRP) information of the current neighbor cells and the serving cell of a terminal; and selecting the target cell for the terminal according to the obtained current load information of the neighbor cells of the terminal and the obtained RSRP information of the neighbor cells and the serving cell. The invention additionally provides corresponding equipment and a corresponding system, which can be used for making comparisons between the cell load and downlink signal quality to find out a high-quality cell for handover.
Description
Technical field
The present invention relates to LTE communication technical field, relate in particular to a kind of in handoff procedure method, the equipment and system of select target community.
Background technology
In LTE communication system, S1 interface is the communication interface between base station and packet-based core networks, and X2 is the communication interface between base station and base station.S1 and X2 interface are two the most basic interfaces, in terminal, carry out in moving process, generally have two kinds of switching modes: by S1 interface or X2 interface, switch.
In prior art, according to the measurement of UE, report and select adjacent cell as Target cell, handover triggering condition reasonable in design, should avoid triggering unnecessary handoff procedure, avoids again conversation loss.When Target cell and the cell-of-origin selected belong to different base station, X2 port switching X2-based handover is carried out in the certain determination methods judgement of source base station or S1 port switches S1-based handover, to target BS, sends handover request message or sends handover request message to MME.Switching mode is mainly to cross the OMC of operation maintenance center manual configuration adjacent cell according to geographical information exchange at present, and the parameters such as switching mode, affair, handoff threshold, switching delay time are set by OMC.
Shown in Figure 1, the detailed process of switching by terminal to report measurement report is as follows:
S101, base station sends measures configuration messages to terminal.
S102, terminal is measured after receiving and measuring configuration messages, and return measurement report is to base station.
S103, opening timing device.
S104 selects to prepare collection community according to measurement report before timer expiry.
S105, base station judgement is initiated switch or switch based on S1 port S1-based based on X2 port x 2-based.
S106, select target community.
S107, according to Handover Request Acknowledge (HANDOVER REQUESTACK) the response message select target community of preparing the reply of collection community; As chosen successfully, enter step 107; As unsuccessful process ends.
S108, sends switching cell order.
Along with the expansion of network small area and number of base stations, quality of handoff is also more and more important.In existing method, by fixed configurations in adjacent area, be just that S1 or X2 switch, switch to the adjacent cell of the artificial setting of terminal to report, can not change according to actual conditions, thereby cause handover success rate not high.Manually according to geographical information configuration adjacent cell, the adjacent cell situation of can not real reaction terminal measuring, can not switch to and be more suitable for the adjacent cell switched, also affects handover success rate.
Summary of the invention
The object of the present invention is to provide a kind of in handoff procedure method, base station and the terminal of select target community, in order to improve the success rate of switching.
The invention provides a kind of in handoff procedure the method for select target community, the method comprises:
Obtain the RSRP information of the current adjacent cell of terminal and Serving cell;
According to the adjacent cell present load information of this terminal of obtaining, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community.
The invention provides a kind of in handoff procedure the method for select target community, the method comprises: terminal is measured the RSRP information of Serving cell and adjacent cell, and the RSRP information reporting of the Serving cell measuring and adjacent cell is carried out to the selection of Target cell to base station.
An equipment for select target community in handoff procedure, this equipment comprises:
Acquiring unit, for obtaining the RSRP information of the current adjacent cell of terminal and Serving cell;
Selected cell, the adjacent cell present load information of this terminal of obtaining for basis, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community.
An equipment for select target community in handoff procedure, this equipment comprises:
Measuring unit, for measuring the RSRP information of Serving cell and adjacent cell, and carries out the selection of Target cell by the RSRP information reporting of the Serving cell measuring and adjacent cell to base station.
In embodiments of the invention, utilize the adjacent cell present load information of this terminal, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community.Adopt technical solution of the present invention to realize to select better community for terminal and switch, solved because thinking that setting switching cell omits the problem of better community.
Accompanying drawing explanation
Fig. 1 is the flow chart that prior art is switched;
Fig. 2 is the method flow diagram of the embodiment of the present invention;
Fig. 3 is the concrete grammar flow chart of the embodiment of the present invention;
Fig. 4 is the structural representation of the equipment of the embodiment of the present invention;
Fig. 5 is the device structure schematic diagram of the embodiment of the present invention;
Fig. 6 is the system configuration schematic diagram of the embodiment of the present invention.
Embodiment
In order to solve prior art, adopt artificial configuration parameter, the people who switches to terminal to report is the neighbor cell setting, and causes the problem that handover success rate is not high.The adjacent cell present load information of this terminal that in the present invention program, basis is obtained, and the RSRP information of described adjacent cell and Serving cell are this terminal select target community.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail, as shown in Figure 2, the method for the embodiment of the present invention a kind of select target community in handoff procedure, step comprises:
S201, obtains the RSRP information of the current adjacent cell of terminal and Serving cell.
S202, according to the adjacent cell present load information of this terminal of obtaining, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community.
Preferably, for this terminal select target community comprises: if present load does not surpass the adjacent cell of setting thresholding, according to RSRP information that surpass to set the adjacent cell of thresholding, the adjacent cell of selecting downlink signal quality to meet to impose a condition is as Target cell.Wherein, load-threshold arranges by Operation and Maintenance OM.Through comparison and selection, determine that the good community of the less downlink signal quality again of load, as Target cell, improved handover success rate and also can not omit the community being more suitable for.
If do not surpass without present load the adjacent cell of setting thresholding, the load of adjacent cell is sorted, from described present load, surpass the adjacent cell of setting thresholding and select the adjacent cell of present load minimum as Target cell.To adjacent cell, load is sorted, and even without finding load to be less than the adjacent cell of setting thresholding, also can select to switch and improve success rate compared with the community of high-quality.
Preferably, if there is no downlink signal quality meets the adjacent cell imposing a condition, the Target cell using the adjacent cell of the self-discovery of terminal to report as this terminal.Switch there is no the situation Xia，Ye Ke community of qualified adjacent cell.
Preferably, obtain the RSRP information of the current adjacent cell of terminal and Serving cell, comprise adjacent cell that receiving terminal measurement reports and the RSRP information of Serving cell, the RSRP information using the RSRP information of the adjacent cell receiving and Serving cell as the current adjacent cell of terminal and Serving cell.The RSRP information of obtaining, as the parameter of weighing downlink signal quality, can be reacted downlink signal quality more accurately.
Preferably, obtain the adjacent cell present load information of this terminal, comprising: in setting storage duration, adjacent cell present load information is stored; The adjacent cell present load information of storage is weighted on average; The adjacent cell present load information that weighted average is obtained is as the adjacent cell present load information of terminal.Wherein, determining of storage duration arranges by OM.The load information obtaining switches for compare to obtain the applicable community of loading condition when switching.
Referring to Fig. 3, it is the idiographic flow of the embodiment of the present invention.
S301, in setting storage duration, stores adjacent cell present load information.
S302, is weighted the adjacent cell present load information of storage on average.
S303, the adjacent cell present load information that weighted average is obtained is as the adjacent cell present load information of terminal.
S304, judges whether present load has and does not surpass the adjacent cell of setting thresholding, enters in this way step S305, as otherwise enter step S306.
S305, terminal is measured the RSRP information of Serving cell and adjacent cell, and the RSRP information reporting of the Serving cell measuring and adjacent cell is carried out to the selection of Target cell to base station, then enters step 307.
S306, sorts the load of adjacent cell, from described present load, surpasses the adjacent cell of setting thresholding and selects the adjacent cell of present load minimum as Target cell.
S307, the difference of the RSRP of the Serving cell that measures of judgement and adjacent cell, when the difference of the RSRP of Serving cell and adjacent cell is less than first threshold, or, when the difference of the RSRP of Serving cell and adjacent cell is greater than Second Threshold, enter step S308; Otherwise enter step S309.Wherein first threshold, Second Threshold arrange by OM.RSRP value by the rule comparison Serving cell set and adjacent cell can show that the adjacent cell that downlink signal quality is high switches.
S308, by the RSRP information reporting of the Serving cell measuring and adjacent cell to base station.
Concrete, can set in advance a timer, the satisfied first threshold that is less than of difference of the Serving cell measuring in step S307 and the RSRP of adjacent cell, or, the difference of the RSRP of Serving cell and adjacent cell is greater than Second Threshold, and during timer expiry, the Serving cell that reporting measurement obtains and the RSRP information of adjacent cell are to base station.The time that timer is set can be 80ms, 120ms, 160ms, 200ms, but can not be oversize.
S309, the Target cell using the adjacent cell of the self-discovery of terminal to report as this terminal.
S310, will meet the adjacent cell that imposes a condition as Target cell.
As shown in Figure 4, be device structure schematic diagram of the present invention.Equipment of the present invention comprises:
Acquiring unit 41, for obtaining the RSRP information of the current adjacent cell of terminal and Serving cell; Be further used for, in setting storage duration, adjacent cell present load information being stored; The adjacent cell present load information of storage is weighted on average; The adjacent cell present load information that weighted average is obtained is as the adjacent cell present load information of terminal.
Selected cell 42, the adjacent cell present load information of this terminal of obtaining for basis, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community; Also be used in present load and surpass set in the situation of adjacent cell of thresholding, according to not surpassing the RSRP information of the adjacent cell of setting thresholding, the adjacent cell of selecting downlink signal quality to meet to impose a condition is as Target cell; In the situation that do not surpass without present load the adjacent cell of setting thresholding, the load of adjacent cell is sorted, from described present load, surpass the adjacent cell of setting thresholding and select the adjacent cell of present load minimum as Target cell; Be further used for again in the situation that do not exist downlink signal quality to meet the adjacent cell imposing a condition the Target cell using the adjacent cell of the self-discovery of terminal to report as this terminal.
As shown in Figure 5, be device structure schematic diagram of the present invention.Equipment of the present invention comprises:
Measuring unit 51, for measuring the RSRP information of Serving cell and adjacent cell, and carries out the selection of Target cell by the RSRP information reporting of the Serving cell measuring and adjacent cell to base station.
Judging unit 52, for judging the difference of the RSRP of the Serving cell that measures and adjacent cell; When the difference of the RSRP of Serving cell and adjacent cell is less than first threshold, or, when the difference of the RSRP of Serving cell and adjacent cell is greater than Second Threshold, by the RSRP information reporting of the Serving cell measuring and adjacent cell to base station.
Fig. 6 is the structural representation of system of the present invention:
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (7)
1. a method for select target community in handoff procedure, is characterized in that, the method comprises:
Obtain the Reference Signal Received Power RSRP information of the current adjacent cell of terminal and Serving cell;
According to the adjacent cell present load information of this terminal of obtaining, and the RSRP information of described adjacent cell and Serving cell, be this terminal select target community;
Described is this terminal select target community, comprising:
If there is present load surpass to set the adjacent cell of thresholding, according to surpassing the RSRP information of the adjacent cell of setting thresholding, the adjacent cell of selecting downlink signal quality to meet to impose a condition is as Target cell;
If do not surpass without present load the adjacent cell of setting thresholding, the load of adjacent cell is sorted, from described present load, surpass the adjacent cell of setting thresholding and select the adjacent cell of present load minimum as Target cell.
2. the method for claim 1, is characterized in that, if there is no downlink signal quality meets the adjacent cell imposing a condition, and the method further comprises:
Target cell using the adjacent cell of the self-discovery of terminal to report as this terminal.
3. the method for claim 1, is characterized in that, obtains the RSRP information of the current adjacent cell of terminal and Serving cell, comprising:
The RSRP information of the adjacent cell that receiving terminal measurement reports and Serving cell, the RSRP information using the RSRP information of the adjacent cell receiving and Serving cell as the current adjacent cell of terminal and Serving cell.
4. the method for claim 1, is characterized in that, obtains the adjacent cell present load information of this terminal, comprising:
In setting storage duration, adjacent cell present load information is stored;
The adjacent cell present load information of storage is weighted on average;
The adjacent cell present load information that weighted average is obtained is as the adjacent cell present load information of terminal.
5. an equipment for select target community in handoff procedure, is characterized in that, this equipment comprises:
Acquiring unit, for obtaining the RSRP information of the current adjacent cell of terminal and Serving cell;
Selected cell, in the situation that there is present load surpass to set the adjacent cell of thresholding, according to not surpassing the RSRP information of the adjacent cell of setting thresholding, the adjacent cell of selecting downlink signal quality to meet to impose a condition is as Target cell; In the situation that do not surpass without present load the adjacent cell of setting thresholding, the load of adjacent cell is sorted, from described present load, surpass the adjacent cell of setting thresholding and select the adjacent cell of present load minimum as Target cell.
6. equipment as claimed in claim 5, is characterized in that, described selected cell, and in the situation that do not exist downlink signal quality to meet the adjacent cell imposing a condition, the Target cell using the adjacent cell of the self-discovery of terminal to report as this terminal.
7. equipment as claimed in claim 5, is characterized in that, described acquiring unit, in setting storage duration, is stored adjacent cell present load information; The adjacent cell present load information of storage is weighted on average; The adjacent cell present load information that weighted average is obtained is as the adjacent cell present load information of terminal.
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| CN201110198666.9A CN102325353B (en) | 2011-07-15 | 2011-07-15 | Method, equipment and system for selecting target cell during handover |
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| CN201110198666.9A CN102325353B (en) | 2011-07-15 | 2011-07-15 | Method, equipment and system for selecting target cell during handover |
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| CN102325353B true CN102325353B (en) | 2014-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9913190B1 (en) * | 2015-07-22 | 2018-03-06 | Sprint Spectrum L.P. | Transferring a wireless device from a serving cell to a target cell |
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| US20140357274A1 (en) * | 2012-01-20 | 2014-12-04 | Nokia Solutions And Networks Oy | Cell handovers |
| CN103313324B (en) * | 2012-03-06 | 2016-02-03 | 普天信息技术研究院有限公司 | The object cell selection method of LTE system and eNB |
| CN103428790B (en) * | 2012-05-23 | 2016-03-02 | 华为技术有限公司 | Cell switching method and communicator |
| CN102883386B (en) * | 2012-09-04 | 2016-06-01 | 大唐移动通信设备有限公司 | Cell switching method in a kind of LTE network and device |
| CN103037458B (en) * | 2012-12-07 | 2015-07-15 | 北京北方烽火科技有限公司 | Method and terminal of cell reselection in long term evolution (LTE) system |
| CN109451545B (en) * | 2012-12-28 | 2021-04-20 | 华为技术有限公司 | Switching judgment method, base station and user equipment |
| CN105103615B (en) * | 2013-02-06 | 2020-01-17 | 爱立信(中国)通信有限公司 | Enhanced solution for handover |
| CN104202758B (en) * | 2014-09-04 | 2018-01-26 | 北京北方烽火科技有限公司 | Plot joint dispatching method and device |
| CN106488472B (en) * | 2015-08-27 | 2020-05-29 | 中国移动通信集团公司 | Channel information reporting method and terminal |
| CN106792950A (en) * | 2015-11-23 | 2017-05-31 | 中兴通讯股份有限公司 | A kind of super-intensive network transfer method, base station, UE and network element |
| CN108243470B (en) * | 2016-12-26 | 2020-11-03 | 大唐移动通信设备有限公司 | Cell switching method and base station |
| CN106856615B (en) * | 2017-02-28 | 2020-05-08 | 重庆邮电大学 | Base station switching method |
| CN108513329A (en) * | 2017-02-28 | 2018-09-07 | 中兴通讯股份有限公司 | Control method, terminal and the system of cell switching |
| CN112187380B (en) * | 2019-07-01 | 2023-04-07 | 中国移动通信集团浙江有限公司 | Serving cell switching method and device |
| CN113840339B (en) * | 2020-06-24 | 2023-02-14 | 华为技术有限公司 | Communication method, device and system |
| CN115209490A (en) * | 2021-04-09 | 2022-10-18 | 北京小米移动软件有限公司 | Cell switching method and device, communication equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101808358B (en) * | 2009-02-18 | 2015-04-15 | 株式会社Ntt都科摩 | Measurement switching method and device in mobile communication |
| CN101815330B (en) * | 2009-02-25 | 2012-08-15 | 大唐移动通信设备有限公司 | Selection method, system and device for switching candidate target cells |
| CN101815331B (en) * | 2009-02-25 | 2014-11-05 | 中兴通讯股份有限公司 | Cooperative cell selection method participating cooperative transmission, service base station and communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9913190B1 (en) * | 2015-07-22 | 2018-03-06 | Sprint Spectrum L.P. | Transferring a wireless device from a serving cell to a target cell |
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