CN100341382C - A method for implementing relay switch - Google Patents
A method for implementing relay switch Download PDFInfo
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- CN100341382C CN100341382C CNB2005100596650A CN200510059665A CN100341382C CN 100341382 C CN100341382 C CN 100341382C CN B2005100596650 A CNB2005100596650 A CN B2005100596650A CN 200510059665 A CN200510059665 A CN 200510059665A CN 100341382 C CN100341382 C CN 100341382C
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Abstract
The present invention discloses a method for realizing relay switches. After an RNC determines a relay switch, a new wireless link is allocated to a UE in a target district; a first reconfiguration command is transmitted to the UE, and a timer RNC_T1 is started; after the receiving the command, the UE carries out reconfiguration to an uplink channel, transmits uplink data to the RNC, and starts a timer UE_T1; if the RNC receives the uplink data before the RNC_T1 is time out and the data is not fault after analysis processing, the RNC transmits a second reconfiguration command to the UE, and starts a timer RNC_T2; if the UE receives the second reconfiguration command before the UE_T1 is time out, then the UE carries out reconfiguration to a downlink channel and transmits a reconfiguration completing message to the RNC; or else the uplink channel of the original cell wireless link is restored to be used; if the RNC receives the reconfiguration completing message before the RNC_T2 is time out, then wireless resources of the original cell are released; or else the wireless resources of the target cell is released. When the switch is unsuccessfulness in the method of the present invention, communication can be switched to the original resources, which ensures that the communication can not be interrupted.
Description
Technical field
The present invention relates to a kind of implementation method of field of mobile communication baton handover.
Background technology
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, the TD SDMA access) the realization purpose of switching in the system is when move UE (portable terminal) leap sub-district, keeps UE and does not interrupt with the communication that inserts side; Perhaps when the signal quality of Serving cell decayed to certain limit, UE can be transformed into the service quality better cell and go.
Two kinds of switching modes are also arranged: direct-cut operation and baton handover among the TD-SCDMA.The implementation of direct-cut operation is that UE needs the original Radio Link of deletion earlier, enables new Radio Link then and carries out communication with the access side.The definition of baton handover just with direct-cut operation be separated by far away.The design philosophy of baton handover is to utilize technology such as smart antenna and uplink synchronous, on the basis that the distance and bearing to UE positions, judge as supplementary whether present UE has moved to the adjacent domain of the adjacent base station that can switch according to UE azimuth-range information.If UE enters the switch area, then RNC (radio network controller) preparation of notifying this base station to carry out switching, thus reach fast, the reliable and efficient purpose of switching.It is the same that relay baton is transmitted in relay in the similar track and field events of this process, thereby we are referred to as baton handover visually.
The special feature of baton handover flow process is in the handoff procedure that UE can not switch to Target cell with the up-downgoing data simultaneously as direct-cut operation, and baton handover is earlier up channel to be switched to Target cell, then down channel is also switched in the Target cell.
Baton handover has following feature: the first, and in handoff procedure, Target cell and former sub-district are all sending downlink data; The second, in the whole baton handover process, UE only receives the reconfigure command of once sending from RNC, and UE reshuffles the up channel of oneself according to this order; But the configuration of down channel is the timing that rule of thumb is worth to be triggered, and just after receive reconfigure command, UE oneself is provided with a timer, timer then after, the configuration of reprovision down channel.This timer rule of thumb is worth to be finished.
For second feature, we can be analyzed as follows: we as can be seen the selection of its down channel time point of reshuffling be based on one's own wishful thinking, finish according to the timer that oneself is provided with.Its process is a unidirectional process, does not know and notify the message existence of access side.We are appreciated that it is blind process of cutting.Blindly cut performance and be: if when UE sends upstream data, RNC does not receive these upstream datas, that is to say that UE will cause expendable result with the blind Target cell that switches to of the down channel of oneself under the situation of improperly-configured of up channel.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that realizes baton handover, and this method can solve blind problem of cutting, and improves success rate for switching.
In order to solve the technical problem that in background technology, proposes, the invention provides a kind of implementation method of baton handover, may further comprise the steps:
(a) after the radio network controller decision baton handover, be that portable terminal distributes a new Radio Link at Target cell at first, the Radio Link by former sub-district sends reconfigure command for the first time to this portable terminal then, and starts timer RNC_T1;
(b) after portable terminal is received the reconfigure command first time, the up channel of oneself is reshuffled, send upstream data to this radio network controller, and start timer UE_T1 by new up channel;
(c) this radio network controller timer RNC_T1 then before, if receive the upstream data that this portable terminal sends and handle errorless by analysis, then send for the second time reconfigure command and start timer RNC_T2, otherwise this radio network controller carries out fault processing to portable terminal;
(d) this portable terminal timer UE_T1 then before, if receive reconfigure command for the second time, then finish the reshuffling of down channel, accept downlink data from Target cell, and send to reshuffle to radio network controller and finish message, finish the switching flow of mobile terminal side;
(e) this radio network controller timer RNC_T2 then before, finish message if receive described reshuffling, then discharge the air-link resources of former sub-district, finish to insert the switching flow of side; Otherwise this radio network controller carries out fault processing, finishes to insert the switching flow of side.
Further, said method also can have following characteristics: in the described step (d), if this portable terminal is not received reconfigure command for the second time, then recover to use the up channel of former sub-district Radio Link, send reconfiguration failure message to radio network controller, finish the switching flow of mobile terminal side.Like this, when switching is unsuccessful, can also allow Radio Link switch back on original resource, the assurance communication can not interrupted.
Further, said method also can have following characteristics: in the described step (d), if this portable terminal is not received reconfigure command for the second time, then directly finish this conversation.
Further, said method also can have following characteristics: when this radio network controller carries out fault processing, if receive reconfiguration failure message, perhaps receive the upstream data of this portable terminal but judge when should not send for the second time reconfigure command, being released in Target cell is the UE assigned radio resource, finishes to insert the switching flow of side.
Further, said method also can have following characteristics: when this radio network controller carried out fault processing, if timer RNC_T1 or RNC_T2 are overtime, this radio network controller adopted a kind of processing in the following method: first kind, do not handle, wait the portable terminal broken string; Second kind, retransmit first or reconfigure command several times for the second time, up to success, perhaps break up to portable terminal; The third, initiatively source of release sub-district and Target cell are the resource that UE distributes, initiatively broken string.
Further, said method also can have following characteristics: the described first time and for the second time reconfigure command can be the physics reconfigure command, transmission channel reconfigure command or radio bearer reconfigure command.
Further, said method also can have following characteristics: the described first time and for the second time reconfigure command be the synchronized reconfiguration order, or asynchronous reconfigure command.
Further, said method also can have following characteristics: comprise up and/or descending configuration requirement the described first time in the reconfigure command, and comprise descending and/or up configuration requirement the described second time in the reconfigure command.
Further, said method also can have following characteristics: timeing closing device RNC_T1 when this radio network controller is received the upstream data of this portable terminal transmission, receive the described timeing closing device RNC_T2 when finishing message that reshuffles, timeing closing device UE_T1 when this portable terminal is received for the second time reconfigure command.
Further, said method also can have following characteristics: in the described step (c), whether wrong the analyzing and processing of the upstream data that this radio network controller sends this portable terminal comprises judges upstream data main lobe direction adjustment aligning UE and that smart antenna is sent, if the error rate of upstream data transfinites or processing procedure in make mistakes, radio network controller just no longer sends reconfigure command for the second time to this portable terminal.
Adopt the inventive method compared with prior art, guaranteed that the upstream data of UE correctly is transferred to the access rear flank, send reconfiguration message to UE again, thereby improved success rate, prevent the blind of UE down channel and cut.
Description of drawings
Fig. 1 is the flow chart of embodiment of the invention relay switching method.
Embodiment
For outstanding advantage of the present invention, earlier existing scheme to be done one and describe in detail and analyze, existing realization flow may further comprise the steps:
Steps A, after the Target cell that UE will switch was determined, RNC sent Radio Link to Target cell and sets up request before sending switching command;
Step B after RNC receives that message is finished in the Radio Link foundation of Target cell, will send the business datum carrying simultaneously to former sub-district and Target cell, and RNC sends baton handover order (physics reconfigure command) to UE simultaneously;
Step C, after UE receives the baton handover order, continuation receives business datum and signaling at the down link of former sub-district, simultaneously, utilize this sub-district and power difference DELTA P between the adjacent cell and the time difference Δ t that obtain in advance, synchronous and the power control by open loop is in up bearer service and the signaling of Target cell emission;
Step D, after continuing for some time, UE brings into use and newly is configured in the Target cell downlink data receiving, realizes closed power and Synchronization Control, interrupts finishing handoff procedure from former sub-district downlink data receiving;
Step e after switching command sends, is received handover success message from UE as RNC, and then RNC sends request to former sub-district, deletes the Radio Link of former sub-district.
Such flow process has 2 deficiencies: the one, and the down link switching has blindness; The 2nd, error handling processing is not ideal enough: promptly when new Radio Resource was disabled, UE can't return on original Radio Resource.
Present embodiment realizes that the method for baton handover is respectively arranged with timer at RNC and UE side, and when timer then the time, flow process can be finished according to error handling processing, has avoided the not closure of flow process.Whole switching flow can be divided into the switching flow of relatively independent access side (being on the RNC) and the switching flow of UE side, when the switching flow that inserts side and UE side has all finished, thinks that whole switching flow finishes.
As shown in Figure 1, this method may further comprise the steps:
S110 after the RNC decision baton handover, is that UE distributes a new Radio Link at Target cell at first, and the Radio Link by former sub-district sends reconfigure command for the first time to UE then, starts timer RNC_T1;
S120, UE receive reconfigure command for the first time, according to the parameter of this order judge be baton handover after, oneself up channel is reshuffled, send upstream data by new up channel to RNC, startup timer UE_T1;
In existing protocol, UE can preserve old configuration (comprising up-downgoing), deletes old configuration again behind new configuration take-effective.If new configuration failure then returns in the old configuration, deletion is configuration newly.
S130, RNC timer RNC_T1 then before, if receive the upstream data (receiving back timeing closing device RNC_T1) that UE sends and handle errorlessly by analysis, then send for the second time reconfigure command and start timer RNC_T2 to UE; Otherwise RNC carries out fault processing;
The analyzing and processing of the upstream data that UE is sent comprises judges whether upstream data is wrong, UE is aimed in the main lobe direction adjustment that smart antenna sends, or the like, if situation such as the error rate of upstream data transfinites, make mistakes in the processing procedure, RNC just no longer sends reconfigure command for the second time to UE.
S140, UE timer UE_T1 then before, if receive reconfigure command for the second time, timeing closing device UE_T1 then, finish downlink data is accepted from Target cell in the back of reshuffling of own down channel, send to reshuffle to RNC simultaneously and finish message, finish the switching flow of UE side; If do not receive reconfigure command for the second time, UE recovers to use the up channel of former sub-district Radio Link, sends reconfiguration failure message to RNC, finishes the switching flow of UE side;
Here, if do not receive reconfigure command for the second time, UE also can directly finish this conversation.
S150, RNC timer RNC_T2 then before, finish message if receive reshuffling that UE sends, RNC discharges the air-link resources of former sub-district, timeing closing device RNC_T2 finishes to insert the switching flow of side; Otherwise RNC carries out fault processing, finishes to insert the switching flow of side.
Among above-mentioned steps S130 and the S150, RNC carries out fault processing in the following manner:
If RNC receives the reconfiguration failure message that UE sends, perhaps RNC receives the upstream data of UE but judges and should not send reconfigure command for the second time that then being released in Target cell is the UE assigned radio resource, finishes to insert the switching flow of side in step S130.
If RNC does not receive any message from UE, when RNC_T1 and RNC_T2 are overtime, can adopt a kind of processing in the following method: 1, do not handle, wait the portable terminal broken string; 2, repeating transmission first or reconfigure command several times for the second time up to success, are perhaps broken up to portable terminal; 3, initiatively source of release sub-district and Target cell are the resource that UE distributes, initiatively broken string.
In the above-mentioned flow process, the reconfigure command of transmission can be the physics reconfigure command, also can be transmission channel reconfigure command or radio bearer (RB) reconfigure command; Can be the synchronized reconfiguration order, also can be asynchronous reconfigure command.In addition, the purpose of a reconfigure command is for collocating uplink, can comprise descending configuration requirement, also can not comprise; The purpose of reconfigure command is for configurating downlink for the second time, can comprise up configuration requirement, also can not comprise.
In sum, the advantage of the inventive method is: the evident characteristic of baton handover is, switches UE switches to Target cell at twice with oneself up-downgoing respectively in the process. And the present invention proposes Send the implementation that twice Physical layer reshuffled to UE, can accomplish that the integrality that operates (namely closes Ring property), the behavior that the UE down channel is reshuffled is controlled to RNC. And this embodiment In the setting of timer, strengthened the integrality of this flow process, when timer then the time, flow process can Finish according to error handling processing, avoided the not closure of flow process.
Claims (10)
1, a kind of implementation method of baton handover may further comprise the steps:
(a) after the radio network controller decision baton handover, be that portable terminal distributes a new Radio Link at Target cell at first, the Radio Link by former sub-district sends reconfigure command for the first time to this portable terminal then, and starts timer RNC_T1;
(b) after portable terminal is received the reconfigure command first time, the up channel of oneself is reshuffled, send upstream data to this radio network controller, and start timer UE_T1 by new up channel;
(c) this radio network controller timer RNC_T1 then before, if receive the upstream data that this portable terminal sends and handle errorless by analysis, then send for the second time reconfigure command and start timer RNC_T2, otherwise this radio network controller carries out fault processing to portable terminal;
(d) this portable terminal timer UE_T1 then before, if receive reconfigure command for the second time, then finish the reshuffling of down channel, accept downlink data from Target cell, and send to reshuffle to radio network controller and finish message, finish the switching flow of mobile terminal side;
(e) this radio network controller timer RNC_T2 then before, finish message if receive described reshuffling, then discharge the air-link resources of former sub-district, finish to insert the switching flow of side; Otherwise this radio network controller carries out fault processing, finishes to insert the switching flow of side.
2, the implementation method of baton handover as claimed in claim 1, it is characterized in that, in the described step (d), if this portable terminal is not received reconfigure command for the second time, then recover to use the up channel of former sub-district Radio Link, send reconfiguration failure message to radio network controller, finish the switching flow of mobile terminal side.
3, the implementation method of baton handover as claimed in claim 1 is characterized in that, in the described step (d), if this portable terminal is not received reconfigure command for the second time, then directly finishes this conversation.
4, the implementation method of baton handover as claimed in claim 1, it is characterized in that, when this radio network controller carries out fault processing, if receive reconfiguration failure message, perhaps receive the upstream data of this portable terminal but judge when should not send for the second time reconfigure command, being released in Target cell is the UE assigned radio resource, finishes to insert the switching flow of side.
5, the implementation method of baton handover as claimed in claim 1, it is characterized in that, when this radio network controller carries out fault processing, if timer RNC_T1 or RNC_T2 are overtime, this radio network controller adopts a kind of processing in the following method: first kind, do not handle, wait the portable terminal broken string; Second kind, retransmit first or reconfigure command several times for the second time, up to success, perhaps break up to portable terminal; The third, initiatively source of release sub-district and Target cell are the resource that UE distributes, initiatively broken string.
6, the implementation method of baton handover as claimed in claim 1 is characterized in that, the described first time and for the second time reconfigure command can be the physics reconfigure command, transmission channel reconfigure command or radio bearer reconfigure command.
7, the implementation method of baton handover as claimed in claim 1 is characterized in that, the described first time and for the second time reconfigure command be the synchronized reconfiguration order, or asynchronous reconfigure command.
8, the implementation method of baton handover as claimed in claim 1 is characterized in that, comprises up and/or descending configuration requirement the described first time in the reconfigure command; And comprise descending and/or up configuration requirement the described second time in the reconfigure command.
9, the implementation method of baton handover as claimed in claim 1, it is characterized in that, timeing closing device RNC_T1 when this radio network controller is received the upstream data of this portable terminal transmission, receive the described timeing closing device RNC_T2 when finishing message that reshuffles, timeing closing device UE_T1 when this portable terminal is received for the second time reconfigure command.
10, the implementation method of baton handover as claimed in claim 1, it is characterized in that, in the described step (c), whether wrong the analyzing and processing of the upstream data that this radio network controller sends this portable terminal comprises judges upstream data main lobe direction adjustment aligning UE and that smart antenna is sent, if the error rate of upstream data transfinites or processing procedure in make mistakes, radio network controller just no longer sends reconfigure command for the second time to this portable terminal.
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| CNB2005100596650A CN100341382C (en) | 2005-03-30 | 2005-03-30 | A method for implementing relay switch |
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| CNB2005100596650A CN100341382C (en) | 2005-03-30 | 2005-03-30 | A method for implementing relay switch |
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| CN100341382C true CN100341382C (en) | 2007-10-03 |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100463564C (en) * | 2005-09-12 | 2009-02-18 | 大唐移动通信设备有限公司 | Switching back method after failure of relay switching |
| CN100569021C (en) * | 2005-10-28 | 2009-12-09 | 华为技术有限公司 | Link converting method in a kind of communication system |
| CN1992966B (en) * | 2005-12-27 | 2010-07-14 | 中兴通讯股份有限公司 | Private wireless link reconfigured method with renewable activation time |
| CN100446584C (en) * | 2006-01-25 | 2008-12-24 | 华为技术有限公司 | Method and system for releasing mobile switching centre resource |
| CN101047622B (en) * | 2006-03-29 | 2010-05-12 | 华为技术有限公司 | Method for scheduling system resource |
| CN1983993B (en) * | 2006-03-29 | 2010-05-12 | 华为技术有限公司 | Method for monitoring system resource |
| CN100461961C (en) * | 2006-04-21 | 2009-02-11 | 华为技术有限公司 | Method for controlling switch in long-distance deductive system |
| CN100461967C (en) * | 2006-08-09 | 2009-02-11 | 华为技术有限公司 | Exception processing method and system in packet switching process |
| JP4965958B2 (en) * | 2006-10-03 | 2012-07-04 | 株式会社エヌ・ティ・ティ・ドコモ | Cell / carrier switching and switchback control during RRC connection |
| CN101212775B (en) * | 2006-12-30 | 2011-04-20 | 华为技术有限公司 | Method and device for handling wireless link failures during switching process |
| WO2008084395A1 (en) * | 2007-01-12 | 2008-07-17 | Nokia Corporation | Apparatus, method and computer program product providing synchronized handover |
| CN101018386B (en) * | 2007-02-07 | 2010-05-26 | 重庆重邮信科通信技术有限公司 | A processing method for speeding up the user terminal measurement after switching |
| CN101420731B (en) * | 2007-10-24 | 2010-12-08 | 华为技术有限公司 | Processing method, system for adding process for wireless link, and drift RNC |
| US9094883B2 (en) | 2009-09-22 | 2015-07-28 | Qualcomm Incorporated | Method and apparatuses for returning the transmission of the uplink to a source cell during a baton handover |
| CN101999243B (en) * | 2009-12-17 | 2017-09-08 | 高通股份有限公司 | Method and apparatus for the clear and definite signaling of the baton handover in TD SCDMA systems |
| US20120163248A1 (en) * | 2010-12-23 | 2012-06-28 | Tom Chin | Baton Handover From TDD-LTE to TD-SCDMA Systems |
| CN103298049A (en) * | 2012-03-05 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for processing timer switching |
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