CN103841613A - Cell switching method and device - Google Patents
Cell switching method and device Download PDFInfo
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- CN103841613A CN103841613A CN201210486803.3A CN201210486803A CN103841613A CN 103841613 A CN103841613 A CN 103841613A CN 201210486803 A CN201210486803 A CN 201210486803A CN 103841613 A CN103841613 A CN 103841613A
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Abstract
The invention discloses a cell switching method and device, and aims to solve problems that, when the UE (User equipment) is used for cell switching, the frequent UE switching makes the signaling cost increase, the switching delay increase, and the communication quality affected. The cell switching method comprises the following steps that: a measurement report sent by the UE is received; according to the measurement report, a target cell meeting a preset condition is filtered so as to generate a target cell list; a switching request message is sent to all target cells of the target cell list; when a confirmation message which is fed back by the target cell is received in a preset duration, according to related parameter information of the target cell, the target cell in the target cell list are sorted in order of priority, and based on the sorted result, the target cell list is updated; and the UE is instructed to switch to the target cell in the highest priority in the updated target cell list. With application of the technical scheme of the invention, the success rate of the cell switching by the UE can be effectively improved, the time delay in the multiple switching is reduced, and the call quality is guaranteed.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of cell switching method and device.
Background technology
In mobile communication technology, the propagation characteristic of movable signal and UE(User equipment, subscriber equipment) mobility, capital causes the UE dynamic change of movable signal and interference signal around, for example, when UE moves to another base station range Nei community from a base station range Nei community, or UE is while being positioned at the cell boarder of base station range, and UE movable signal around will change.Now, for guarantee UE and mobile network continue communicate by letter, keep QoS of survice (the Quality of Service needing, quality of service), the better base station of user and signal quality is connected, and realize the load balancing between floored community at hot zones, and UE need to be carried out to community switching, switch to target BS coverage Nei community by UE from source base station coverage Nei community.Consult the schematic diagram that Figure 1 shows that UE community intersection in many base station ranges.
In prior art, the method for UE being carried out to community switching is: the measurement report that source base station sends according to UE, and screening meets pre-conditioned Target cell generation Target cell list, and source base station indication UE switches to the Target cell in the list of Target cell.The method of specifically UE being carried out to community switching has two kinds conventionally:
Consult and Figure 2 shows that the flow chart one that in prior art, UE is carried out reconfiguration failure scene, source base station receives the measurement report that UE reports, according to the Target cell formation Target cell list in this measurement report, and in the list of Target cell, select first object community, UE is switched to first object community by plan, start handoff preparation phase timer, to CN(Core Network, core net) transmission handover request message; The handover request message that CN sends source base station is sent to target BS corresponding to first object community; Target BS receives after handover request message, to CN feedback switching request acknowledgement message; After the switching request acknowledgement message of CN receiving target base station feedback, send switching command message to source base station; Base station receives after the base station switching command message of CN feedback, and indication UE switches to Target cell, and switch after indication UE successful execution community, sends handover success message to target BS; Target BS sends handover success message to CN, and CN discharges the resource of having distributed and this message is sent to source base station.When in above-mentioned cell switch process, indication execution community task switching is switched in the community that UE fails to send according to source base station, and UE feeds back switch failure information to source base station; Base station receives after above-mentioned switch failure information, sends handover cancelling message to CN; CN is sent to target BS according to handover cancelling message by discharging the message related to resources of having distributed, and to source base station feedback handover cancelling acknowledge message.Now, source base station can be attempted other Target cells except first object community in the list of above-mentioned Target cell, repeats above-mentioned cell switch process.
Consult and Figure 3 shows that the flowchart 2 that in prior art, UE is carried out reconfiguration failure scene, source base station receives the measurement report that UE reports, according to the Target cell formation Target cell list in this measurement report, and in the list of Target cell, select first object community, start handoff preparation phase timer, send handover request message to CN; The handover request message that CN sends source base station is sent to target BS corresponding to Target cell; Target BS receives after handover request message, fails to be connected to target BS, makes in above-mentioned timer is set duration, and CN does not receive the feedback information that target BS sends, or target BS is to CN feedback handover request failed message; Source base station, according to the above-mentioned information of CN feedback, is attempted other Target cells except first object community in the list of Target cell, until UE correctly carries out the indication of source base station, switches to the selected target community in the list of Target cell.
In prior art, while adopting said method to carry out community switching to UE, source base station is the variation of perception Target cell signal quality flexibly, when in the mobile network coverage environment of UE in load, the quick variation of Target cell signal quality can cause UE frequently to switch, increase the extra signaling consumption of network side, made UE be more prone to call drop.In addition, switching in the unsuccessful situation in first object community, source base station need to attempt switching to other candidate target cells in the list of Target cell, replicated plot handoff procedure, therefore,, repeatedly switching in unsuccessful situation, will cause larger time delay.
Summary of the invention
The embodiment of the present invention provides a kind of cell switching method and device, in order to solve in prior art, low to Target cell signal quality perception flexibility ratio at the source base station that UE is carried out exist when switch community, the frequent switching of UE increases signaling consumption, increase handover delay, affect the problem of speech quality.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A kind of cell switching method, comprising:
Receive the measurement report that UE sends, meet pre-conditioned Target cell according to described measurement report screening, generate Target cell list;
All Target cells in the list of described Target cell send handover request message, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results;
Indication UE switches to the highest Target cell of described Target cell list medium priority after renewal.
A kind of community switching device shifter, comprising:
List generation unit, the measurement report sending for receiving UE, meets pre-conditioned Target cell according to described measurement report screening, generates Target cell list;
List update unit, send handover request message for all Target cells to the list of described Target cell, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results;
Switch indicating member, be used to indicate UE and switch to the highest Target cell of described Target cell list medium priority after renewal.
In the embodiment of the present invention, receive the measurement report that UE sends, meet pre-conditioned Target cell according to this measurement report screening, generate Target cell list; All Target cells in the list of above-mentioned Target cell send handover request message, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of above-mentioned Target cell, and upgrade the list of above-mentioned Target cell based on ranking results; Indication UE switches to the highest Target cell of list medium priority, Target cell after renewal.Adopt technical solution of the present invention, the success rate that can effectively improve UE and carry out community switching, reduces repeatedly handover delay, guarantees speech quality.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of UE community intersection in many base station ranges in prior art;
Fig. 2 is the flow chart one that in prior art, UE is carried out reconfiguration failure scene;
Fig. 3 is the flowchart 2 that in prior art, UE is carried out reconfiguration failure scene;
Fig. 4 is the structural representation of embodiment of the present invention small area switching device shifter;
Fig. 5 is the flow chart that in the embodiment of the present invention, UE is carried out community switching;
Fig. 6 carries out to UE the Target cell list forming in cell switch process in the embodiment of the present invention;
Fig. 7 is the detail flowchart that in the embodiment of the present invention, UE is carried out community switching;
Fig. 8 is the mutual schematic diagram of specifying information that in the embodiment of the present invention, UE is carried out community switching.
Embodiment
In order to solve in prior art, low to Target cell signal quality perception flexibility ratio at the source base station that UE is carried out exist when switch community, UE switches frequently makes signaling consumption increase, and increases handover delay, affects the problem of speech quality.In the embodiment of the present invention, receive the measurement report that UE sends, meet pre-conditioned Target cell according to this measurement report screening, generate Target cell list; All Target cells in the list of above-mentioned Target cell send handover request message, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of above-mentioned Target cell, and upgrade the list of above-mentioned Target cell based on ranking results; Indication UE switches to the highest Target cell of list medium priority, Target cell after renewal.Adopt technical solution of the present invention, the success rate that can effectively improve UE and carry out community switching, reduces repeatedly handover delay, guarantees speech quality.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
Consult shown in Fig. 4, in the embodiment of the present invention, community switching device shifter comprises list generation unit 40, list update unit 41 and switching indicating member 42, wherein,
Based on technique scheme, to consult shown in Fig. 5, in the embodiment of the present invention, the flow process of UE being carried out to community switching is as follows:
Step 500: receive the measurement report that UE sends, meet pre-conditioned Target cell according to this measurement report screening, generate Target cell list.
Be specially:
Source base station sends and measures control message to UE, and UE sends UE measurement report according to this measurement control message to source base station; Source base station is according to measurement report, and screening meets pre-conditioned Target cell and generates initial target cell list.Above-mentioned UE is sent in the measurement report of source base station and comprises Target Cell Identifier corresponding to all Target cells, and the information such as pilot signal strength corresponding to Target cell, source base station extracts and preserves Target Cell Identifier corresponding to each Target cell from measurement report, and pilot signal strength corresponding to each Target cell, judge according to pilot signal strength whether the Target cell that UE detects meets switching condition, in the time that certain Target cell pilot signal strength is greater than handoff threshold, judge the condition that this Target cell meets UE and carries out community switching.
According to source base station receive UE send measurement report in pilot signal strength corresponding to each Target cell, sorted from high to low according to pilot signal strength in Target cell in above-mentioned initial target cell list, from this Target cell list, select successively N Target cell, generate Target cell list.Above-mentioned N is predetermined number, sets according to actual conditions.
In the embodiment of the present invention, UE is according to the variation of surrounding environment, sends measurement report in real time to source base station, and the measurement report that source base station sends according to UE, extracts and preserve the Target Cell Identifier of Target cell, and the information such as pilot signal strength.And, because UE sends measurement report to source base station in real time, there is repeatedly the situation that all occurs same Target cell in measurement report, now, extract and preserve the number of times that in measurement report, different target community occurs, the more information in the list of new target cell.The content of Target cell list update is comprised the quantity of Target cell in the list of Target cell is upgraded.
Step 510: all Target cells in the list of above-mentioned Target cell send handover request message, when receive the switching request acknowledgement message of Target cell transmission in default duration time, according to Target cell relevant parameter information, sorted according to Target cell priority in the Target cell in the list of above-mentioned Target cell, and upgrade the list of above-mentioned Target cell based on ranking results.
Be specially:
Source base station sends handover request message to each Target cell in the list of Target cell simultaneously, each Target cell arranges the timer corresponding with it, when source base station sends handover request message to Target cell, start timer corresponding to this Target cell.
After the handover request message that reception sources base station, Target cell sends, in the default duration of timer, feed back corresponding message to source base station.This feedback information is sent to source base station by core net, and the feedback message that Target cell is sent to core net comprises switching request acknowledgement message and handover request failed message.In the time that source base station receives the handover request failed message of Target cell feedback, this Target cell is deleted from the list of Target cell.When core net receives after the switching request acknowledgement message of Target cell transmission, send switching command message to source base station, when source base station receives switching command message, be that source base station is when receiving the acknowledge message of Target cell feedback, close timer corresponding to this Target cell, and preserve the time T (being signalling time delay) that is received the message of Target cell feedback by source base station to Target cell transmission handover request message to source base station.When in the default duration of timer, when source base station does not receive the message of Target cell feedback, show connection failure, this Target cell is deleted from the list of Target cell, and source base station sends handover cancelling request message to core net, and request target community is released to the resource that above-mentioned Target cell has been distributed.
In the embodiment of the present invention, each Target cell is sent to core net to source base station feedack switching request acknowledgement message, core net receives after the message of Target cell transmission, send switching command message to source base station, source base station extracts and preserves reconfiguration information corresponding to each Target cell from switching command message, and Target cell payload information.Target cell payload can be by the RAB(Radio Access Bear carrying in switching command message, RAB) number weigh, RAB is corresponding with Target cell number of services, RAB number is more, the ability that shows Target cell receiving UE business is stronger, Target cell load is less, be switched to this Target cell after communication quality better.
After said process, source base station is preserved Target cell relevant parameter corresponding to all Target cells in the list of Target cell, and this Target cell relevant parameter comprises signalling time delay T, pilot signal strength, Target cell load, the information such as the number of times that Target cell occurs.Now, according to Target cell relevant parameter information, sorted according to Target cell priority in the Target cell in the list of above-mentioned Target cell, upgrade the list of above-mentioned Target cell: first, according to pilot signal strength corresponding to each Target cell in the list of Target cell, Target cell list is sorted, pilot signal strength is higher, the priority of corresponding Target cell is higher, if the pilot signal strength that Target cell correspondence is repeatedly measured,, to after above-mentioned repeatedly result calculating mean value, compare the size of pilot signal strength mean value; In the time that average pilot signal intensity corresponding to multiple Target cells is identical, add up the number of times that different target community that above-mentioned average pilot signal intensity is identical occurs in measurement report, occurrence number is more, and priority is higher; The number of times occurring in measurement report when above-mentioned multiple Target cells is still identical, compares the identical Target cell payload of occurrence number, and Target cell load is less, and priority is higher; Still identical if load in Target cell corresponding to above-mentioned multiple Target cell, comparison object community meets the size of signalling time delay T corresponding to big or small identical Target cell, and T is less for signalling time delay, and the priority of corresponding Target cell is higher.According to above-mentioned a series of Target cells relevant parameter, more new target cell list, making priority the highest is that the best Target cell of signal quality is positioned at Target cell list foremost.Consult and Figure 6 shows that in the embodiment of the present invention, the schematic diagram of Target cell list.
Above-mentioned to Target cell list ordering, make Target cell that priority is higher be positioned at the front end of Target cell list, can effectively guarantee the signal quality of Target cell when UE carries out community switching, effectively improve UE and carried out the success rate of community switching, and guaranteed that UE carries out the speech quality after the switching of community.
Step 520: indication UE switches to the highest Target cell of list medium priority, Target cell after renewal.
Be specially:
In said process, source base station, according to Target cell relevant parameter, carries out real-time update to the Target cell list in the list of Target cell, makes the Target cell of signal quality be positioned at Target cell list foremost.Source base station sends the highest reconfiguration message corresponding to Target cell of above-mentioned Target cell list medium priority to UE, and indication UE carries out community switching.Wherein, the highest Target cell of Target cell list medium priority is necessary for the state that trial cut did not change.
In above-mentioned cell switch process, if handoff failure, UE sends switch failure information to source base station, source base station sends handover cancelling message to core net, request core net discharges the resource of having distributed, and the Target cell of above-mentioned handoff failure is labeled as to the state of attempting simultaneously, and source base station will be attempted next Target cell in the list of Target cell, send reconfiguration message corresponding to next Target cell in the list of above-mentioned Target cell to UE, indication UE carries out community switching.When UE carries out after successful switch, the target BS that UE is corresponding to Target cell sends handover success message, and target BS corresponding to Target cell sends handover success message to core net, and core net receives after above-mentioned message, sends instruction releasing UE resources to source base station.
Below in conjunction with concrete scene, consult shown in Fig. 7, introduce in detail the process of carrying out community switching:
Step 700: source base station is according to UE to the measurement report sending, and screening meets pre-conditioned Target cell, generates Target cell list.
In the embodiment of the present invention, a Target cell centered by a target BS, i.e. the corresponding target BS in Target cell.UE detects surrounding signals, send measurement report to source base station, source base station is according to extracting Target Cell Identifier after this measurement report, generate initial target cell list, source base station judges in this initial target cell list whether meet switching condition, deletes the Target cell that does not meet switching condition from initial target cell list.From above-mentioned measurement report, extract pilot signal strength corresponding to each Target cell in above-mentioned initial target cell list, and according to the size of pilot signal strength, sorted in the Target cell of initial target cell list, from initial target selective listing, select behind the Target cell of predetermined number, generate Target cell list.
Step 710: corresponding each Target cell arranges a timer, source base station sends handover request message by core net to all Target cells in the list of Target cell simultaneously, starts timer corresponding to above-mentioned each Target cell simultaneously.
Step 720: all Target cells in the list of Target cell send switching request acknowledgement message to core net in default duration.
Step 730: core net receives after the switching request acknowledgement message of Target cell transmission, sends switching command message to source base station.
Before default duration arrives, source base station receives the measurement report that UE sends in real time, and according to this measurement report, upgrades the list of above-mentioned Target cell, and repeats above-mentioned steps and send handover request message to the Target cell newly adding in the list of Target cell.In the embodiment of the present invention, the number of times that in statistical measurement report, same Target cell occurs.And, be sent to by above-mentioned core net and in the switching command message of source base station, extract Target cell corresponding to each Target cell in the list of Target cell and load.
In addition, in the embodiment of the present invention, in the time that source base station receives switching command message, owing to comprising Target Cell Identifier in switching command message, according to Target Cell Identifier, close timer corresponding to this Target cell, preserve duration corresponding to timer, the duration that this timer is corresponding is signalling time delay corresponding to this Target cell.
Step 740: in the time that Preset Time arrives, the average pilot signal intensity corresponding according to each community in the list of Target cell successively, the number of times that Target cell occurs, Target cell load, signalling time delay is upgraded Target cell list.
The above-mentioned method according to Target cell relevant parameter information updating Target cell list is: according to pilot signal strength corresponding to each Target cell in the list of Target cell, Target cell list is sorted, make the Target cell that priority is the highest, be positioned at Target cell list foremost, pilot signal strength is higher, the priority of corresponding Target cell is higher, if the pilot signal strength that Target cell correspondence is repeatedly measured,, to after above-mentioned repeatedly result calculating mean value, compare the size of pilot signal strength mean value; In the time that pilot signal strength corresponding to multiple Target cells is identical, add up the number of times that different target community occurs in measurement report, occurrence number is more, and priority is higher; The number of times occurring in measurement report when above-mentioned multiple Target cells is still identical, comparison object cell load size, and Target cell load is less, and priority is higher; If Target cell corresponding to above-mentioned multiple Target cell load is still identical, the size of signalling time delay T relatively, T is less for signalling time delay, and the priority of corresponding Target cell is higher.
Through said process, Target cell list is upgraded, make the best Target cell of signal quality be positioned at Target cell list foremost.
Step 750: source base station sends to UE reconfiguration message corresponding to Target cell (hereinafter to be referred as first object community) that list medium priority in Target cell is the highest, and indication UE switches to first object community.If switch unsuccessfully, perform step 760; If handover success, performs step 770.
Step 760:UE sends switch failure information to source base station, and the switch failure information that source base station sends according to UE sends handover cancelling message to core net; Core net sends resource release request message to first object community, request is released in the resource that first object community takies.Source base station attempts UE to switch to the next Target cell of first object community in the list of Target cell.
In the time that UE cannot switch to first object community,, in the list of Target cell, first object community is labeled as to the state of attempting.
Step 770: Target cell receives the handover success message that UE sends, Target cell is after core net feedback handover success message, and core net notification source base station discharges the shared resource of UE.
In the above-described embodiments, consult shown in Fig. 8, to comprise three Target cells in the list of Target cell as example, the information interactive process between target BS corresponding to source base station, core net CN, user equipment (UE) and Target cell is:
Step 800:UE is to source base station reporting measurement reports 1.
According to measurement report, 1 screening meets pre-conditioned Target cell to source base station, forms Target cell list.
Step 801: source base station sends handover request message 1, handover request message 2 and handover request message 3 to core net CN corresponding to three target BS simultaneously.
In the time that source base station sends handover request message to CN, start the regular device corresponding to different target base station.
Step 802:CN sends handover request message 1 corresponding to target BS 1, sends handover request message 2 corresponding to target BS 2, sends handover request message 3 corresponding to target BS 3.
Step 803: target BS receives the backward CN feedback of above-mentioned handover request message switching request acknowledgement message 1, switching request acknowledgement message 2 and switching request acknowledgement message 3.
After the switching request acknowledgement message that step 804:CN sends target BS is processed, send corresponding to the switching command message 1 of target BS 1 to source base station, corresponding to the switching command message 2 of target BS 2 with corresponding to the switching command message 3 of target BS 3.Meanwhile, close this timer.
Step 805: before timer arrives the maximum preset time, UE sends up-to-date measurement report 2, measurement report 3 and measurement report 4 in real time to source base station, and source base station is according to the more new target cell list of above-mentioned measurement report.
Step 806: in the time arriving timer maximum preset duration, source base station is according to the more new target cell list of Target cell relevant parameter, extract the relevant information of Target cell 1 correspondence that list medium priority in Target cell is the highest, send reconfiguration message according to this relevant information to UE, indication UE carries out community switching.
Step 807: if UE carries out cell handover operations failure, send switch failure information to source base station.
Step 808: source base station sends handover cancelling message to core net CN.
Step 809:CN sends resource release request message according to this handover cancelling message to target BS 1, and notification target base station 1 is released to the resource that UE distributes.
Step 810: source base station is attempted base station corresponding to next Target cell, i.e. target BS 2 in the list of Target cell.Source base station sends reconfiguration message to UE, comprises the relevant information in target BS 2 in this reconfiguration message.
Step 811:UE is switched to target BS 2 by source base station, after handover success, sends handover success message to target BS 2.
Step 812: target BS 2 receives after the handover success message being sent by UE, sends handover success message informing CN handover success to CN.
Step 813:CN notification source base station discharges the shared resource of UE.Finally, complete cell handover operations.
In the embodiment of the present invention, if source base station is attempted, behind Target cells all in the list of Target cell, not being successfully completed yet the cell handover operations of UE, source base station attempt above-mentioned in steps, again receive the measurement report that UE sends, and again obtain Target cell list, carry out Target cell switching.
In sum, in the embodiment of the present invention, receive the measurement report that UE sends, meet pre-conditioned Target cell according to this measurement report screening, generate Target cell list; All Target cells in the list of above-mentioned Target cell send handover request message, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of above-mentioned Target cell, upgrade the list of above-mentioned Target cell; Indication UE switches to the highest Target cell of above-mentioned Target cell list medium priority.Adopt technical solution of the present invention, according to multiple parameters, Target cell list is repeatedly sorted, thereby make UE switch to top-quality Target cell, the success rate that can effectively improve UE and carry out community switching; Simultaneously send handover request message to all Target cells in the list of Target cell simultaneously, and the Target cell generation Target cell list of feedback message will be received, when UE is in the list of Target cell when the handoff failure of some Target cells, need not be again send handover request message to the next Target cell in the list of Target cell, reduce repeatedly handover delay, guaranteed speech quality.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the embodiment of the present invention the embodiment of the present invention.Like this, if within these of the embodiment of the present invention 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 (14)
1. a cell switching method, is characterized in that, comprising:
Receive the measurement report that user equipment (UE) sends, meet pre-conditioned Target cell according to described measurement report screening, generate Target cell list;
All Target cells in the list of described Target cell send handover request message, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results;
Indication UE switches to the highest Target cell of described Target cell list medium priority after renewal.
2. the method for claim 1, is characterized in that, receives the measurement report that UE sends, and meets pre-conditioned Target cell according to described measurement report screening, generates Target cell list, comprising:
Receive the measurement report that UE sends, extract pilot signal strength corresponding to each Target cell comprising in measurement report, and generate initial target cell list according to described measurement report;
Sorted from high to low according to pilot signal strength in Target cell in described initial target cell list, from the list of described Target cell, select successively the Target cell of predetermined number, generate Target cell list.
3. the method for claim 1, is characterized in that, all Target cells in the list of Target cell send handover request message, receives the acknowledge message of Target cell feedback in default duration, comprising:
Each Target cell in the list of Target cell is arranged to corresponding timer, while sending handover request message to all Target cells in the list of described Target cell, start corresponding timer;
When receive the acknowledge message of Target cell feedback in default duration time, close corresponding timer, preserve timer duration corresponding to described Target cell, and from described acknowledge message, extract Target cell information on load corresponding to described Target cell.
4. method as claimed in claim 2 or claim 3, is characterized in that, according to Target cell relevant parameter information, is sorted according to priority in the Target cell in the list of described Target cell, and upgrades the list of described Target cell based on ranking results, comprising:
Before default duration reaches, receive the measurement report that UE sends in real time, from described measurement report, extract the number of times that each Target cell occurs;
According to the number of times that in the list of described Target cell, each community occurs, and pilot signal strength corresponding to each Target cell, average pilot signal intensity corresponding to each Target cell calculated;
According to described average pilot signal intensity, sorted according to Target cell priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results.
5. method as claimed in claim 4, is characterized in that, according to described average pilot signal intensity, is sorted according to Target cell priority in the Target cell in the list of described Target cell, comprising:
In the time that average pilot signal intensity corresponding at least two Target cells in the list of described Target cell is identical, these at least two Target cells are carried out prioritization by the number of times occurring according to these at least two Target cells.
6. method as claimed in claim 5, is characterized in that, these at least two Target cells are carried out prioritization by the number of times occurring according to these at least two Target cells, comprising:
When the number of times that occurs when these at least two Target cells is identical, these at least two Target cells are carried out prioritization by the Target cell load corresponding according to these at least two Target cells.
7. method as claimed in claim 6, is characterized in that, according to these at least two Target cells respectively corresponding Target cell load prioritization is carried out in these at least two Target cells, comprising:
When loading when identical in Target cell corresponding to these at least two Target cells, according to these at least two Target cells respectively corresponding timer duration just carry out prioritization in these at least two Target cells.
8.Yi Zhong community switching device shifter, is characterized in that, comprising:
List generation unit, the measurement report sending for receiving UE, meets pre-conditioned Target cell according to described measurement report screening, generates Target cell list;
List update unit, send handover request message for all Target cells to the list of described Target cell, when receive the acknowledge message of Target cell feedback in default duration time, according to Target cell relevant parameter information, sorted according to priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results;
Switch indicating member, be used to indicate UE and switch to the highest Target cell of described Target cell list medium priority after renewal.
9. device as claimed in claim 8, it is characterized in that described list generation unit, the measurement report sending specifically for receiving UE, extract pilot signal strength corresponding to each Target cell comprising in measurement report, and generate initial target cell list according to described measurement report; Sorted from high to low according to pilot signal strength in Target cell in described initial target cell list, from the list of described Target cell, select successively the Target cell of predetermined number, generate Target cell list.
10. device as claimed in claim 8, it is characterized in that, described list update unit, specifically for each Target cell in the list of Target cell is arranged to corresponding timer, while sending handover request message to all Target cells in the list of described Target cell, start corresponding timer; When receive the acknowledge message of Target cell feedback in default duration time, close corresponding timer, preserve timer duration corresponding to described Target cell, and from described acknowledge message, extract Target cell information on load corresponding to described Target cell.
11. devices as described in claim 9 or 10, is characterized in that, described list update unit, specifically for before default duration reaches, receives the measurement report that UE sends in real time, extracts the number of times that each Target cell occurs from described measurement report; According to the number of times that in the list of described Target cell, each community occurs, and pilot signal strength corresponding to each Target cell, average pilot signal intensity corresponding to each Target cell calculated; According to described average pilot signal intensity, sorted according to Target cell priority in the Target cell in the list of described Target cell, and upgrade the list of described Target cell based on ranking results.
12. devices as claimed in claim 11, it is characterized in that, described list update unit, specifically for: in the time that average pilot signal intensity corresponding at least two Target cells in the list of described Target cell is identical, these at least two Target cells are carried out prioritization by the number of times occurring according to these at least two Target cells.
13. devices as claimed in claim 12, it is characterized in that, described list update unit, specifically for: when the number of times that occurs when these at least two Target cells is identical, according to these at least two Target cells respectively corresponding Target cell load prioritization is carried out in these at least two Target cells.
14. devices as claimed in claim 13, it is characterized in that, described list update unit, specifically for: when loading when identical in Target cell corresponding to these at least two Target cells, according to these at least two Target cells respectively corresponding timer duration prioritization is carried out in these at least two Target cells.
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