CN1802014A - Cell switching method - Google Patents
Cell switching method Download PDFInfo
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- CN1802014A CN1802014A CN 200510053500 CN200510053500A CN1802014A CN 1802014 A CN1802014 A CN 1802014A CN 200510053500 CN200510053500 CN 200510053500 CN 200510053500 A CN200510053500 A CN 200510053500A CN 1802014 A CN1802014 A CN 1802014A
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Abstract
Present invention discloses a cell switching method. It contains wireless networks applying resource to target cell, adjusting rate according to rate and cell resource, configuring wireless link parameter according to adjustive rate, switching to target cell. Said invention can effectively solve switching failing due to target cell resource restriction through changing rate to re-setting channel parameter in switching, raise resource utilization.
Description
Technical field
The present invention relates to a kind of network communications technology, relate in particular to a kind of cell switching method.
Background technology
In mobile communication system, for the utilance that improves frequency spectrum resource and the capacity of whole system, the radio-frequency power in the system must be confined within certain scope.When travelling carriage leaves a sub-district and enters the another one sub-district, the signal of the former sub-district that it is received can be more and more a little less than, and its received signal that enters the sub-district will be more and more stronger.In order to guarantee the communication quality of travelling carriage, travelling carriage must be switched to the stronger new base station of signal by original base station, promptly switch to Target cell by the cell-of-origin.According to the frequency difference before and after switching, switching can be divided into switching frequently and non-with switching frequently, the non-switching with frequency comprises alien frequencies direct-cut operation and different system direct-cut operation.According to the switchover policy difference, switching can be divided into network control switching, Mobile Assisted Handover and travelling carriage control switching etc.At present, such as all employings Mobile Assisted Handover strategy of newer mobile radio system such as GSM (global system for mobile communications), CDMA (code division multiple access) and WCDMA (Wideband Code Division Multiple Access (WCDMA)).In this strategy, travelling carriage and base station are measured the quality of forward direction and backward channel respectively, and measurement result is reported network, then carry out switch decision by network based measurement result.
Existing soft handover or direct-cut operation all are to set up the Target cell air-link resources earlier, initiate then to switch.
As shown in Figure 1, with the direct-cut operation be below example describe travelling carriage from the sub-district 1 to the sub-district 2 process.
At first, RNC (radio network controller) receives the measurement report of travelling carriage, and according to measurement report, and whether judgement meets switching condition, if meet switching condition, then triggers handoff procedure, promptly initiate sub-district 1 to the sub-district 2 direct-cut operation.Then, RNC carries out Radio Link and sets up process, promptly earlier to sub-district 2 application air-link resources, the application of 2 pairs of these air-link resources in sub-district is adjudicated, and the result that will adjudicate feeds back to RNC, RNC adjudicates air-link resources according to the result who feeds back and whether applies for success, if air-link resources application success, then issue the physical channel reconfiguration message and give travelling carriage, the indication travelling carriage from the sub-district 1 direct-cut operation to the sub-district 2, after travelling carriage is finished switching, and physical channel reshuffled finish message and return to RNC.Then RNC finishes the Radio Link delete procedure of sub-district 1.
Yet, when the Target cell resource is sufficient,, can cause the wasting of resources if do not distribute to travelling carriage.
In addition, when Target cell resource-constrained,, reason such as power resource limited or transfer resource limited resource-constrained as sign indicating number may cause setting up the air-link resources of Target cell, causes handoff failure.Because user's mobility, if can not switch to the optimal objective sub-district in time, the user just has the possibility of call drop.
Summary of the invention
Above-mentioned defective at prior art the purpose of this invention is to provide a kind of cell switching method, thereby has improved resource utilization, when the Target cell inadequate resource, can improve handover success rate effectively.
The present invention is achieved through the following technical solutions, and the invention provides a kind of cell switching method, and described method comprises:
A, radio network controller are to Target cell application resource;
B, adjust speed according to current business speed and Target cell resource;
C, according to the rate configuration radio link parameter of adjusting;
D, switch to Target cell.
Described resource comprises: sign indicating number resource, power resource, transfer resource.
Described step B further comprises: if the resource that the Target cell resource is mated greater than current business speed, and current business speed then promotes speed less than the maximum rate of core net assignment.
Described step B further comprises: if the resource that the Target cell ascending resource is mated greater than current business speed, and current business speed then promotes ascending resource speed less than the maximum rate of core net assignment.
Described step B further comprises: if the resource that the Target cell downlink resource is mated greater than current business speed, and current business speed then promotes downlink resource speed less than the maximum rate of core net assignment.
Described step B further comprises: if the resource that the Target cell resource is mated less than current business speed, and the Target cell resource allows the minimum-rate greater than the core net assignment, then changing down.
Described step B further comprises: if the resource that the Target cell ascending resource is mated less than current business speed, and the permission of Target cell resource then reduces ascending resource speed greater than the minimum-rate of core net assignment.
Described step B further comprises: if the resource that the Target cell downlink resource is mated less than current business speed, and the permission of Target cell resource then reduces downlink resource speed greater than the minimum-rate of core net assignment.
Behind execution in step D, after the not enough resource of Target cell is removed, according to predetermined policy rise speed.
Describedly be meant: behind official hour, carry out speed according to the professional actual speed of using again according to predetermined policy rise speed.
Described step B also comprises: if the Target cell resource resource of being mated less than current business speed, and can not obtain the situation of not enough resource by changing down, then process finishes.
According to the present invention, reshuffle channel parameter by adaptively changing speed when switching, can be under the situation of Target cell resource abundance, in handoff procedure, reshuffle channel parameter and improve speed, thereby improved resource utilization, in addition, also can solve the handoff failure that causes owing to Target cell is resource-constrained effectively
Description of drawings
Fig. 1 shows direct-cut operation;
Fig. 2 shows the flow chart that switch sub-district of the present invention.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
We know that service rate and local resource are directly proportional, and promptly service rate is big more, and the local resource of requirement is also big more, and promptly the down transmitting power of Yao Qiuing, transmission bandwidth etc. are also big more.For example, when service rate was 384K, then the power of Yao Qiuing was 4dB, and transmission bandwidth is 384k; When service rate was 8K, then the power of Yao Qiuing was-10dB, and transmission bandwidth is 8k.
The invention provides a kind of cell switching method of adaptively changing speed, main thought is: change demand to the Target cell resource by changing service rate, thereby improved the utilization of resources and the handover success rate of sub-district.Particularly, when travelling carriage when Target cell switches, RNC if Target cell is resource-constrained, then triggers reduction of speed rate direct-cut operation to Target cell application air-link resources; Otherwise whether judgement can the raising speed rate, if the Target cell resource allows, then triggers raising speed rate direct-cut operation, otherwise triggers normal handoff procedure.
Describe below according to cell switch process of the present invention.
As shown in Figure 2, in step 201, judgement triggers switches, when the travelling carriage that moves in communication period, can measurement target the signal strength signal intensity of sub-district, switch when requiring when signal strength signal intensity reaches, then send handoff request to RNC, RNC according to handoff request to Target cell application resource, Target cell according to resource request to the RNC feedback information.Described handoff request comprises the interior wireless wireless request message of setting up between request message and radio network controller of setting up of radio network controller.
In the step 202, radio network controller carries out the access judgement to Target cell, be whether the resource that radio network controller is adjudicated Target cell according to the Target cell feedack satisfies the resource of being applied for, in feedack, comprise judgement to resources such as sign indicating number resource, power resource, transfer resources, but be not limited to above-mentioned several, the resource of the new link establishment of every restriction all the judgement and so on.For example, the sign indicating number resource that current business needs is during greater than the sign indicating number resource of Target cell, then sign indicating number is resource-constrained, can't set up the required Radio Resource of link at Target cell, at this moment then enter step 203, attempt to reduce demand, once more to Target cell application resource, so that switch to Target cell to the sign indicating number resource by changing down; Otherwise enter step 205, whether judgement needs the professional raising speed rate to the active user.
In step 203, when the Target cell access is failed, judge whether alleviate the Target cell resource by changing down; If,
In step 204, judge whether to surpass maximum reattempt times, if,
In step 206, finish this switching;
Otherwise in step 205, according to the resource of the current permission of Target cell and the minimum-rate of core net assignment, changing down returns step 202, but judgement access Target cell whether again;
Otherwise for the situation that can not alleviate the Target cell resource by changing down, execution in step 206 finishes this switching.
For example, if the Target cell resource resource of being mated less than current business speed, and the Target cell resource allows the minimum-rate greater than the core net assignment, changing down then, configurating radio link parameter.Different reasons for the resource anxiety, reduction of speed rate strategy can be handled according to the different branch situations of the concrete reason value of returning, and for example, ascending resource can not obtain only to reduce upstream rate, downlink resource can not obtain only to reduce downstream rate, with the up-downgoing separate processes.In addition, if the Target cell resource resource of being mated less than current business speed, and can not obtain the situation of not enough resource by changing down, then process finishes.
In step 207, whether judgement needs the professional raising speed rate to the active user; Particularly, if current business speed less than the maximum rate of core net assignment, and the Target cell resource allow to set up the Radio Link greater than current business speed, then execution in step 208, otherwise execution in step 209.
Step 208: if the resource that the Target cell resource is mated greater than current business speed, and current business speed then promotes speed less than the maximum rate of core net assignment; Configurating radio link parameter, execution in step 210 then.
For the different reasons of resource abundance, promoting the speed strategy can handle according to the different branch situations of the concrete reason value of returning, and for example, the ascending resource abundance can only promote upstream rate, and the downlink resource abundance can only promote downstream rate, with the up-downgoing separate processes.
In step 209, RNC is according to the service rate configurating radio link parameter.
In step 210, switch.
Number of retries can influence handover delay, and number of times is too much, and handover delay increases.Greater than 1 not only time delay increase, and the retry success rate may reduce.The how many times retry specifically is set, can determines according to actual conditions.In this example, preferably, number of retries is chosen as 1.
For the situation that the reduction of speed rate is switched, when the not enough resource of Target cell was removed, service rate went up to have 4 kinds of strategies:
1, the not enough resource of Target cell is removed, and service rate immediately gos up;
2, the not enough resource of Target cell is removed the speed of ging up after the stipulated time;
3, the not enough resource of Target cell is removed, and after the stipulated time, again according to the actual operating position of business, can use AMRC (adaptive multi-rate control), DCCC (dynamic channel configuration control) algorithm controls speed to go up;
4, the not enough resource of Target cell is removed, according to the professional actual speed adjustment of using.
For the afore mentioned rules time, be difficult for oversize, also difficult too short.If oversize, if actual conditions are wished the speed that raises, the user wishes to obtain two-forty and will can not be met for a long time; If too short, if not enough resource is removed, a large number of users all requires speed, causes resource to carry out tense situation immediately again easily, the table tennis situation occurs.In the present embodiment, preferentially adopt the third strategy, carry out speed according to actual conditions after the stipulated time.For example, when travelling carriage was set up in the cell-of-origin business, speed was 384K, Target cell is because of Iub (interface between NodeB and the RNC) bandwidth deficiency during switching, and reduction of speed is to the 64K retry, thereby makes handover success, remove when Target cell Iub bandwidth resources are nervous, can adopt AMRC, DCCC algorithm controls speed to go up, promptly according to actual conditions, if the active user has not needed 384K, keep 64k also can, when the user needs 384K, the speed of ging up again.
Cell switching method of the present invention is applicable to various switching types, and as soft handover, with frequently direct-cut operation and alien frequencies direct-cut operation, above-mentioned switching type comprises switching in the RNC and the various switchings between RNC.
According to the present invention, carry out the sub-district switching by adjusting speed, when the Target cell resource is nervous, solved because the Target cell inadequate resource causes the problem of handoff failure, reduce cutting off rate, when the Target cell resource is sufficient, can improve service rate, thereby improved the resource utilization of communication system, improved communication efficiency.
Though described the present invention by embodiment, those of ordinary skills know, without departing from the spirit and substance in the present invention, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (11)
1. a cell switching method is characterized in that, comprising:
A, radio network controller are to Target cell application resource;
B, adjust speed according to current business speed and Target cell resource;
C, according to the rate configuration radio link parameter of adjusting;
D, switch to Target cell.
2. cell switching method according to claim 1 is characterized in that, described resource comprises: sign indicating number resource, power resource, transfer resource.
3. cell switching method according to claim 1, it is characterized in that, described step B further comprises: if the resource that the Target cell resource is mated greater than current business speed, and current business speed then promotes speed less than the maximum rate of core net assignment.
4. cell switching method according to claim 3, it is characterized in that, described step B further comprises: if the resource that the Target cell ascending resource is mated greater than current business speed, and current business speed then promotes ascending resource speed less than the maximum rate of core net assignment.
5. cell switching method according to claim 3, it is characterized in that, described step B further comprises: if the resource that the Target cell downlink resource is mated greater than current business speed, and current business speed then promotes downlink resource speed less than the maximum rate of core net assignment.
6. cell switching method according to claim 1, it is characterized in that, described step B further comprises: if the resource that the Target cell resource is mated less than current business speed, and the Target cell resource allows the minimum-rate greater than the core net assignment, then changing down.
7. cell switching method according to claim 6, it is characterized in that, described step B further comprises: if the resource that the Target cell ascending resource is mated less than current business speed, and the permission of Target cell resource then reduces ascending resource speed greater than the minimum-rate of core net assignment.
8. cell switching method according to claim 6, it is characterized in that, described step B further comprises: if the resource that the Target cell downlink resource is mated less than current business speed, and the permission of Target cell resource then reduces downlink resource speed greater than the minimum-rate of core net assignment.
9. according to claim 6,7 or 8 described cell switching methods, it is characterized in that, behind execution in step D, after the not enough resource of Target cell is removed, according to predetermined policy rise speed.
10. cell switching method according to claim 9 is characterized in that, describedly is meant according to predetermined policy rise speed: behind official hour, carry out speed according to the professional actual speed of using again.
11. cell switching method according to claim 1 is characterized in that, described step B also comprises: if the Target cell resource resource of being mated less than current business speed, and can not obtain the situation of not enough resource by changing down, then process finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510053500 CN1802014A (en) | 2005-01-06 | 2005-03-15 | Cell switching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510000179 | 2005-01-06 | ||
| CN200510000179.1 | 2005-01-06 | ||
| CN 200510053500 CN1802014A (en) | 2005-01-06 | 2005-03-15 | Cell switching method |
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| CN1802014A true CN1802014A (en) | 2006-07-12 |
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| CN 200510053500 Pending CN1802014A (en) | 2005-01-06 | 2005-03-15 | Cell switching method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316540A (en) * | 2010-07-08 | 2012-01-11 | 中兴通讯股份有限公司 | Method and system for access control in handover |
| CN102422675A (en) * | 2009-05-10 | 2012-04-18 | 高通股份有限公司 | Method and apparatus for maintaining quality of service during regulatory domain change |
| CN102547887A (en) * | 2011-01-04 | 2012-07-04 | 鼎桥通信技术有限公司 | Network-striding migrating method and wireless network controller |
| CN102655425A (en) * | 2011-03-02 | 2012-09-05 | 爱立信(中国)通信有限公司 | Method and base station for regulating and controlling upstream load change caused by changing wave beam direction |
| CN101836481B (en) * | 2007-08-21 | 2013-03-27 | 诺基亚西门子通信公司 | Handover of a user equipment with forwarding and reusing a user equipment configuration |
| CN103024836A (en) * | 2011-09-20 | 2013-04-03 | 中兴通讯股份有限公司 | Reception control method and device in cell handover process |
-
2005
- 2005-03-15 CN CN 200510053500 patent/CN1802014A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836481B (en) * | 2007-08-21 | 2013-03-27 | 诺基亚西门子通信公司 | Handover of a user equipment with forwarding and reusing a user equipment configuration |
| CN102422675A (en) * | 2009-05-10 | 2012-04-18 | 高通股份有限公司 | Method and apparatus for maintaining quality of service during regulatory domain change |
| CN102316540A (en) * | 2010-07-08 | 2012-01-11 | 中兴通讯股份有限公司 | Method and system for access control in handover |
| CN102316540B (en) * | 2010-07-08 | 2016-08-03 | 中兴通讯股份有限公司 | A kind of connection control method when switching and system |
| CN102547887A (en) * | 2011-01-04 | 2012-07-04 | 鼎桥通信技术有限公司 | Network-striding migrating method and wireless network controller |
| CN102547887B (en) * | 2011-01-04 | 2014-09-17 | 鼎桥通信技术有限公司 | Network-striding migrating method and wireless network controller |
| CN102655425A (en) * | 2011-03-02 | 2012-09-05 | 爱立信(中国)通信有限公司 | Method and base station for regulating and controlling upstream load change caused by changing wave beam direction |
| WO2012116584A1 (en) * | 2011-03-02 | 2012-09-07 | Ericsson (China) Communications Co., Ltd. | Method and base station of adjusting uplink load variance due to uplink beam direction change |
| CN102655425B (en) * | 2011-03-02 | 2014-12-10 | 爱立信(中国)通信有限公司 | Method and base station for regulating and controlling upstream load change caused by changing wave beam direction |
| US9585055B2 (en) | 2011-03-02 | 2017-02-28 | Telefonaktiebolaget L M Ericsson | Method and base station of adjusting uplink load variance due to uplink beam direction change |
| CN103024836A (en) * | 2011-09-20 | 2013-04-03 | 中兴通讯股份有限公司 | Reception control method and device in cell handover process |
| CN103024836B (en) * | 2011-09-20 | 2018-03-02 | 中兴通讯股份有限公司 | Acceptance controlling method and device in cell switch process |
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