CN102123462A - Method and LTE (long term evolution) system for across node B handover of user terminal - Google Patents
Method and LTE (long term evolution) system for across node B handover of user terminal Download PDFInfo
- Publication number
- CN102123462A CN102123462A CN2011100677920A CN201110067792A CN102123462A CN 102123462 A CN102123462 A CN 102123462A CN 2011100677920 A CN2011100677920 A CN 2011100677920A CN 201110067792 A CN201110067792 A CN 201110067792A CN 102123462 A CN102123462 A CN 102123462A
- Authority
- CN
- China
- Prior art keywords
- user terminal
- message
- target
- target cell
- upright
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000007774 longterm Effects 0.000 title abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 235000021186 dishes Nutrition 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
Abstract
The invention discloses a method and LTE (long term evolution) system for across node B handover of a user terminal. The method comprises: after receiving a handover request from the user terminal, a target evolved node B (eNB) utilizes a target cell handover information to generate target cell reestablishment information and locally store the target cell reestablishment information; after receiving a reestablishment request from the user terminal, the target eNB judges whether the reason values in the reestablishment request are handover failures or not, if not, the target eNB matches the target cell reestablishment information with the user terminal; and then reestablishment succeeds. Compared with the prior art, the handover method and the LTE system have the following advantages: when the UE sends the reestablishment request to the target eNB and if the reason values in the reestablishment request are not handover failures, the target eNB matches the reestablishment ready information generated by target cell information with a UE (user equipment) entity, and then the reestablishment succeeds. By utilizing the method, the success rate of the establishment during the handover process is improved, thereby ensuring that the UE has no dropped call, and reducing the dropped call rate of the UE.
Description
Technical field
The invention belongs to LTE (Long Term Evolution, Long Term Evolution) wireless communication technology field, be specifically related to changing method and LTE system that a kind of user terminal is striden the base station.
Background technology
In the LTE system, the state of user terminal (UE, User Equipment) is divided into two kinds of connected state (RRC_CONNECTED) and Idle state (RRC_IDLE).When the UE under being in the RRC_CONNECTED state has moved to another sub-district from Serving cell, will trigger handover (Handover), to guarantee professional not interrupting.
Divide from the resident base station of UE scene, switch the switching that is divided in the eNB (Evolved NodeB, the Node B of evolution), the switching between eNB.Switching in the eNB is meant that the cell-of-origin of switching and Target cell are positioned at same eNB; Switching between eNB is meant that the cell-of-origin of switching is positioned at different eNB with Target cell.Whether from needing to participate in finishing switching by EPC (Evolved Packet Core, the packet-based core networks of evolution), the angle branch perhaps occurs in S1 interface or X2 interface branch from switching, and the switching between eNB is divided into the X2 interface switching again and the S1 interface switches.Whether carry out the non-competing branch of access at random from UE, be divided into competition again and switch and non-competing switching at Target cell.
Because UE generally is in two cell edges and is in mobile status in handoff procedure, radio signal quality is more weak and unstable, and the signal of two other sub-district also might mutually disturb, therefore very likely can handoff failure, UE will call drop, greatly influences systematic function.In order to reduce the possibility of UE call drop, the LTE system has introduced a kind of technology: RRC (Radio Resource Control, radio resource control) and has rebuild upright.The purpose of this process is to rebulid RRC to connect, and it relates to the reconstruction of SRB1 (Signalling RadioBearerl, Signaling Radio Bearer 1) and the activation again of safety.If under the RRC connected state and the UE that activated of safety detect Radio Link Failure, perhaps handoff failure, perhaps from EUTRAN (Evolved Universal Terrestrial Radio Access Network, the general continental rise wireless access network of evolution) system moves failure, perhaps receive the integrity checking failure indication of bottom, or reconfiguration failure etc., then can carry out the cell selecting process, initiate the upright flow process of RRC reconstruction for this sub-district by sending RRC connection re-establishment request (RRC Connection Reestablishment Request) message after choosing suitable cell, connect to continue RRC.The RRC connection re-establishment only is ready in related cell, could success when an effective UE context is promptly arranged.In case it is upright that eNB has accepted to rebuild, the activity of other RB (Radio Bearer, radio bearer) continues to suspend, and SRB1 (Signalling Radio Bearerl, Signaling Radio Bearer 1) rebuilds earlier, and then rebuilds other RB.If AS (Access Stratum, Access Layer) safety is not activated, UE can not initiate this flow process and can enter into IDLE (free time) attitude immediately.It is the process of eating dishes without rice or wine that RRC rebuilds upright process, does not need the participation of MME (Mobility Management Entity, mobile management entity).
When the upright reason of the reconstruction of UE is handoff failure, UE can use C-RNTI (the Cell Radio Network Temporary Identifier of handover source sub-district in RRC Connection ReestablishmentRequest, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI), the shortMAC-I that produces of physCellId (Physical Cell Identifier) and cell-of-origin information etc., therefore these must be rebuild upright ready message at handoff preparation phase source eNB and bring target eNB, so that UE heavily is established to the success of Target cell energy.When the upright reason of the reconstruction of UE is not handoff failure, then can in RRC Connection Reestablishment Request, use the upright information of reconstruction of switching target small area.
In the non-competing handoff procedure between eNB, target eNB enters handoff preparation phase after the handoff request of receiving source eNB, prepare the UE related resource, distribute special-purpose leading, and put it in the RRC reallocation message of carrying mobility information, again the RRC reallocation message is put into switching response message and issue source eNB, start UE reprovision timer then, source eNB gives UE with this RRC reallocation message of transparent transmission.UE carries the special-purpose leading request message of access at random (MSG1) by transmission after receiving the special-purpose leading switching command of band, is initiated to the non-competing of target eNB and inserts at random.Carry special-purpose leading MSG1 if target eNB detects, then reply accidental access response message (MSG2) to UE, UE receives that MSG2 is an accidental access response, just thinks to send handover success the RRC reprovision that switches to target eNB and finish message (MSG3).If target eNB was received UE and is rebuild upright request before receiving MSG3, think that then the reconstruction of handoff failure is upright, the upright information of the reconstruction that can use the cell-of-origin to bring is mated UE.Target eNB is received the upright request of reconstruction of receiving UE again behind the MSG3, thinks that then the reconstruction behind the handover success is upright, and the upright information of the reconstruction of using switching target small area information to generate is mated UE.
Owing to the radio signal quality instability, MSG3 might can't arrive target eNB under the scene that switches.If non-competing switching, UE receives MSG2, thinks handover success, follow-uply initiates to rebuild immediately because of Radio Link Failure etc., rebuilds the information that can use switching target small area in the upright request at RRC and sets up the upright information of rebuilding.But target eNB is not owing to receive MSG3, thinks that the reconstruction of handoff failure is upright, preparation be the upright information of reconstruction of cell-of-origin, and the upright ready message of the reconstruction of not preparing the generation of switching target small area information, therefore rebuild upright information matches and do not go up, cause rebuilding upright failure, the UE call drop.
Summary of the invention
The main technical problem to be solved in the present invention provides changing method and the LTE system that a kind of user terminal is striden the base station, has improved and has rebuild upright success rate in the handoff procedure, has reduced the cutting off rate of user terminal.
For solving the problems of the technologies described above, the invention provides the changing method that a kind of user terminal is striden the base station, comprise step:
After target eNB receives the handoff request of user terminal, use switching target small area information to generate Target cell and rebuild upright information and be kept at this locality;
Target eNB is judged when the cause value of rebuilding in the upright request is not handoff failure after receiving the upright request of reconstruction of user terminal, then uses Target cell to rebuild upright information matches user terminal, rebuilds and stands successfully.
Among one embodiment, target eNB is preserved the upright information of Target cell reconstruction and is also further comprised step afterwards:
Target eNB generates and carries the reallocation message of mobility information and send to source eNB, after source eNB receives this message is passed through user terminal.
Among one embodiment, also further comprise step:
After user terminal is received the reallocation message that carries mobility information, send the special-purpose leading request message of access at random that carries in the reallocation message to Target cell;
Target cell is received and is inserted the request back use special-purpose leading user terminal example that matches wherein at random, replys accidental access response message to user terminal, carries this example corresponding district Radio Network Temporary Identifier in the described accidental access response message;
User terminal is received accidental access response message, detects the corresponding district Radio Network Temporary Identifier, thinks the sub-district handover success.
Among one embodiment, user terminal is thought and is also further comprised step behind the handover success:
The message that the user terminal transmission carries user terminal identification and rebuilds upright cause value triggers the reconstruction that switches to Target cell and founds flow process to Target cell.
Among one embodiment, after standing successfully, reconstruction also further comprises step:
Target eNB is redistributed resource, generates new security parameter, sends to user terminal by RRC connection re-establishment request message;
User terminal is rebuild the content of standing in the message according to RRC, and the configuration local resource activates new security parameter, sends the RRC connection re-establishment to target eNB then and finishes message.
Among one embodiment, target eNB is used switching target small area information to generate the upright information of Target cell reconstruction and is specially:
Generate the upright information of Target cell reconstruction according to the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of Target cell, the shortMAC-I that physics unit identifies and target cell information produces.
A kind of LTE system comprises source eNB, target eNB and user terminal, after described target eNB receives the handoff request of user terminal, uses switching target small area information to generate Target cell and rebuilds upright information and also be kept at this locality; Described target eNB is judged when the cause value of rebuilding in the upright request is not handoff failure after receiving the upright request of reconstruction of user terminal, then uses Target cell to rebuild upright information matches user terminal, rebuilds and stands successfully.
Among one embodiment, generate the reallocation message that carries mobility information after the upright information of target eNB preservation Target cell reconstruction and send to source eNB, will pass through user terminal after this reallocation message after source eNB receives.
Among one embodiment, after user terminal receives the reallocation message that carries mobility information, send the special-purpose leading request message of access at random that carries in the reallocation message, initiate to insert at random to Target cell; Target cell is received and is inserted the request back use special-purpose leading user terminal example that matches wherein at random, replys accidental access response message to user terminal, carries this example corresponding district Radio Network Temporary Identifier in the described accidental access response message; User terminal is received accidental access response message, detects the corresponding district Radio Network Temporary Identifier, thinks the sub-district handover success.
Among one embodiment, the message that the user terminal transmission carries user terminal identification and rebuilds upright cause value triggers the reconstruction that switches to Target cell and founds flow process to Target cell.
Among one embodiment, after reconstruction was stood successfully, target eNB was redistributed resource, generates new security parameter, sends to user terminal by RRC connection re-establishment request message; User terminal is rebuild the content of standing in the message according to RRC, and the configuration local resource activates new security parameter, sends the RRC connection re-establishment to target eNB then and finishes message.
Among one embodiment, target eNB generates the upright information of Target cell reconstruction according to the shortMAC-I of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI, physics unit sign and the target cell information generation of Target cell.
Compared with prior art, the handoff preparation phase of target eNB after receiving handoff request preserved two parts and rebuild upright ready message in changing method of the present invention and the LTE system, portion is in the prior art during UE handoff failure, the upright ready message of reconstruction that source eNB comes by the handoff request band, after another part was the UE handover success, target eNB was used switching target small area information to generate Target cell and is rebuild upright information.When UE sent out the upright request of reconstruction to target eNB, if the upright cause value of reconstruction wherein is a handoff failure, the upright ready message of reconstruction that then band is come in the target eNB use handoff request matched the UE example, rebuilds successfully; If the cause value of rebuilding in the upright request be a handoff failure, as Radio Link Failure etc., then the target eNB upright ready message of reconstruction of using target cell information to generate matches the UE example, and reconstruction is stood successfully.This method has improved rebuilds upright success rate in the handoff procedure, thereby has effectively guaranteed not call drop of UE, has reduced the cutting off rate of UE.
Description of drawings
A kind of user terminal that Fig. 1 provides for the embodiment of the invention one is striden the changing method flow chart of base station;
The interface relationship figure of the subscriber equipment that Fig. 2 switches for generation X2, Node B, mobile management entity and the gateway of evolution;
A kind of user terminal that Fig. 3 provides for the embodiment of the invention two is striden the base station changing method flow chart that X2 switches is taken place;
The interface relationship figure of the subscriber equipment that Fig. 4 switches for generation S1, Node B, mobile management entity and the gateway of evolution;
A kind of user terminal that Fig. 5 provides for the embodiment of the invention three is striden the base station changing method flow chart that S1 switches is taken place.
Embodiment
In conjunction with the accompanying drawings the present invention is described in further detail below by embodiment.
Embodiment one
See also shown in Figure 1ly, a kind ofly improve the changing method that user terminal is rebuild upright success rate, comprise step:
Step 1-3: source eNB receives the measurement report of UE, or because the load balancing function triggers switching, sends handoff request (Handover Request) message by X2 mouth or S1 mouth to target eNB, and this switching includes but not limited to the switching that mobility triggers.The upright ready message of reconstruction that includes but not limited to RRC context, the UE ability of UE in the Handover Request message and comprise the handover source cell information.
Step 4-5: target eNB is received and is preserved the upright ready message of reconstruction that UE related context information and source eNB band are come after the handoff request, distributing radio resource, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI CRNTI, special-purpose leading etc., and become the upright information of Target cell reconstruction to be kept at this locality according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI, the Physical Cell Identifier physCellId of Target cell and the shortMAC-I of target cell information generation again, guarantee UE no matter heavily be established to switching target small area after handover success or the failure, target eNB all can match the UE example.
Step 6: target eNB returns Handover Request Acknowledge (HandoverRequest Acknowledge) message for source eNB by X2 mouth or S1 mouth, wherein carry the reallocation message that generates by target eNB, distribute to the mobile message etc. that the CRNTI of UE, special-purpose leading and indication UE are linked into Target cell including but not limited to target eNB in this reallocation message.
Step 7: after source eNB receives reallocation message is passed through UE.
Step 8:UE receives the reallocation message of carrying mobile message, is synchronized to Target cell, sends the special-purpose leading random accessing message MSG1 that carries in the reallocation message to Target cell, initiates to insert at random.
Step 9: the MAC layer of Target cell is received the special-purpose leading UE of the matching example that uses behind the MSG1 wherein.
Step 10: Target cell is replied accidental access response message MSG2 to UE, and MSG2 carries the CRNTI of this example correspondence.
Step 11:UE receives MSG2, detects corresponding CRNTI, thinks handover success.
Step 12:UE sends the RRC reprovision and finishes message (MSG3) failure or also do not send MSG3, or owing to reasons such as Radio Link Failure, the reconstruction that need be initiated to switching target small area is upright.
Step 13:UE sends RRC Connection Reestablishment Request message to target eNB, because UE thinks handover success, carry the user terminal identification (UE-Identity) that target cell information is formed in this message, rebuilding upright cause value is Radio Link Failure or other failure.
Step 14-15: target eNB is received the upright request of reconstruction of UE when the reprovision of waiting for UE is finished message, check that the upright cause value of reconstruction wherein is not handoff failure, the reconstruction that UE-Identity that then will be wherein and handoff preparation phase use target cell information to generate is found ready message and is complementary, after matching the UE example, redistribute related resource, generate new security parameter, bring UE by RRC connection re-establishment (RRC ConnectionReestablishment) message.
Step 16:UE receives the upright response of reconstruction that target eNB sends, according to the content configuration local resource in this message, activate new security parameter, send the RRC connection re-establishment to target eNB and finish (RRCConnection Reestablishment Complete) message.Target eNB is received this message, rebuilds and stands successfully, rebuilds upright process and finishes the wireless link recovery between UE and the eNB.
Through the processing of above-mentioned steps, when UE thinks handover success, and target eNB thinks that under the situation of failure, UE can successfully heavily be established to target eNB, and the business of UE can not interrupted.
Divide X2 interface between eNB to switch below and the S1 interface switches to example and specifies.
Embodiment two
See also shown in Figure 2, UE, eNB, MME, S-GW (Service Gate Way that Fig. 2 switches for X2, gateway) annexation figure, there is the coupling of X2 mouth between two eNB, there are the UU mouth in UE and eNB1 before switching, promptly eat dishes without rice or wine, the UU mouth that switches back UE and eNB1 is disconnected, sets up the UU mouth with eNB2.
See also shown in Figure 3ly, switching flow is as follows:
The signal quality that step 301:UE detects certain sub-district among the eNB2 is higher than certain thresholding than the signal quality of Serving cell, reports the measurement report of A3 incident.
The X2 that step 302-303:eNB1 judgement UE need proceed to eNB2 switches, send handoff request (Handover Request) message to eNB2, wherein found ready message including but not limited to UE historical information, UE wireless capability message, UE business information and by the reconstruction that handover source cell information and switching target small area physical layer ID form.
Step 304-306:eNB2 preserves the UE relevant information that includes but not limited to the upright information of handover source sub-district reconstruction after receiving handoff request, distribute related resource, admit and the local resource preparation, and again according to the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of Target cell, the shortMAC-I that Physical Cell Identifier physCellId and target cell information produce becomes the upright information of Target cell reconstruction to be kept at this locality, send switching request response (Handover Request Acknowledge) message to eNB1 then, wherein carry the information such as reallocation message that are transmitted to UE by eNB1.
Step 307:eNB1 passes through UE with reallocation message wherein after receiving Handover Request Acknowledge message.This reallocation message is set up by eNB2, wherein carries indication UE and switches to the mobility information of Target cell, CRNTI that eNB2 distributes to this UE, special-purpose leading, Radio Resource etc.
Step 308:UE receives the reallocation message of carrying mobile message, is synchronized to Target cell, sends to Target cell and carries the special-purpose leading MSG1 that rebuilds in the upright message, initiates to insert at random.
Step 309: the MAC layer of Target cell is received the special-purpose leading UE of the matching example that uses behind the MSG1 wherein.
Step 310: Target cell is replied accidental access response MSG2 to UE, carries the CRNTI of this example correspondence.
Step 3211:UE receives MSG2, detects corresponding CRNTI, thinks handover success.
Step 312:UE sends reprovision to switching target small area and finishes message (MSG3), but because up DCCH channel abnormal condition, Target cell is not received MSG3.
Step 313:UE does not receive the response message of MSG3, repeats to send MSG3.MSG3 sends and surpasses maximum times, and then UE is triggered to the upright flow process of reconstruction of switching target small area, sends RRC ConnectionReestablishment Request to eNB2, wherein carries UE-Identity, rebuilds upright cause value etc.Carry the UE-Identity that target cell information is formed in this message by handover success because UE thinks, and the upright cause value of reconstruction is a Radio Link Failure.
Step 314-315:eNB2 is in the upright request of reconstruction that the reconstruction of waiting for UE is upright receives UE when finishing message, check that the upright cause value of reconstruction wherein is not handoff failure, the reconstruction that UE-Identity that then will be wherein and handoff preparation phase use target cell information to generate is found ready message and is complementary, after matching the UE example, redistribute related resource, generate new security parameter, bring UE by RRC Connection Reestablishment message.
Step 316:UE receives the upright response message of reconstruction that eNB2 sends, and according to the content configuration local resource in this message, activates new security parameter, sends RRC Connection ReestablishmentComplete message to eNB2.ENB2 receives this message, rebuilds and founds successfully the wireless link recovery between UE and the eNB2.ENB2 rebuilds upright UE and recovers to continue uncompleted X2 switching flow behind the DRB, guarantees that the business of UE switches to eNB2 fully.
Through the processing of above-mentioned steps, when UE thinks handover success, and eNB2 thinks that under the situation of failure, UE can successfully heavily be established to eNB2, and the business of UE can not interrupted.
Embodiment three
See also shown in Figure 4ly, there are not the coupling of X2 mouth in UE, the eNB that Fig. 4 switches for S1, the annexation figure of MME, S-GW between two eNB, and there is the UU mouth in UE with eNB1 before switching, and promptly eats dishes without rice or wine, and the UU mouth that switches back UE and eNB1 breaks, and sets up the UU mouth with eNB2.
See also shown in Figure 5ly, switching flow is as follows:
The signal quality that step 501:UE detects certain sub-district among the eNB2 is higher than certain thresholding than the signal quality of Serving cell, reports the measurement report of A3 incident.
The S1 that step 502-503:eNB1 judgement UE need proceed to eNB2 switches, send switching to MME and require (Handover Required) message, wherein carry cells such as Source to Target transparent container, found ready message by the reconstruction that handover source cell information and switching target small area physical layer ID form, switch reasons etc., the data inverse-transmitting path is designated as indirect anti-pass.
Step 504:MME sends handoff request (Handover Request) message to eNB2 after receiving Handover Required message, wherein carries the business information of Source to Target transparent container, UE etc.
Step 505-507:eNB2 preserves the UE relevant information that includes but not limited to the upright information of handover source sub-district reconstruction after receiving handoff request, distribute related resource, admit and the local resource preparation, and be kept at this locality according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI, the Physical Cell Identifier physCellId of Target cell and the upright information of shortMAC-I generation Target cell reconstruction of target cell information generation again, send Handover Request Acknowledge message to MME then, wherein carry the information such as switching command that are transmitted to UE by eNB1.
Step 508:MME sends switching command (Handover Command) message to eNB1, wherein carries the wireless relevant parameter Target to Source transparent container of the eNB2 of eNB2 transmission.
After step 509:eNB1 received Handover Command, the switching command with among the Target to Source transparentcontainer promptly carried the reallocation message of mobility information and issues UE.
Step 510:UE receives the reallocation message of carrying mobile message, is synchronized to Target cell, sends the special-purpose leading MSG1 that carries in the reallocation message to Target cell, initiates to insert at random.
Step 511-512: the MAC layer of Target cell is received the special-purpose leading UE of the matching example that uses behind the MSG1 wherein, and MSG2 is an accidental access response to the UE answer, carries the CRNTI of this example correspondence.
Step 513:UE receives MSG2, detects corresponding CRNTI, thinks handover success.
Step 514-515:UE does not also send reprovision and finishes message MSG3 appearance before unusually, trigger and rebuild upright flow process, through cell selecting, decision heavily is established to switching target small area, send RRC ConnectionReestablishment Request to eNB2, wherein carry UE-Identity, rebuild upright cause value etc.Carry the UE-Identity that target cell information is formed in this message by handover success because UE thinks, and the upright cause value of reconstruction is other failure.
Step 516-517:eNB2 receives the upright request of reconstruction of UE when the reprovision of waiting for UE is finished message, check that the upright cause value of reconstruction wherein is not handoff failure, the reconstruction that UE-Identity that then will be wherein and handoff preparation phase use target cell information to generate is found ready message and is complementary, after matching the UE example, redistribute related resource, generate new security parameter, bring UE by RRC Connection Reestablishment message.
Step 518:UE receives the upright response of reconstruction that eNB2 sends, and according to the content configuration local resource in this message, activates new security parameter, sends RRC Connection Reestablishment Complete message to eNB2.ENB2 receives this message, rebuilds and founds successfully the wireless link recovery between UE and the eNB2.ENB2 rebuilds upright UE and recovers to continue uncompleted S1 switching flow behind the DRB, guarantees that the business of UE switches to eNB2 fully.
Through the processing of above-mentioned steps, when UE thinks handover success, and eNB2 thinks that under the situation of failure, UE can successfully heavily be established to eNB2, and the business of UE can not interrupted.
Above content be in conjunction with concrete execution mode to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (12)
1. a user terminal is striden the changing method of base station, it is characterized in that, comprises step:
After target eNB receives the handoff request of user terminal, use switching target small area information to generate Target cell and rebuild upright information and be kept at this locality;
Target eNB is judged when the cause value of rebuilding in the upright request is not handoff failure after receiving the upright request of reconstruction of user terminal, then uses Target cell to rebuild upright information matches user terminal, rebuilds and stands successfully.
2. changing method as claimed in claim 1 is characterized in that, target eNB is preserved the upright information of Target cell reconstruction and also further comprised step afterwards:
Target eNB generates and carries the reallocation message of mobility information and send to source eNB, after source eNB receives this message is passed through user terminal.
3. changing method as claimed in claim 2 is characterized in that, also further comprises step:
After user terminal is received the reallocation message that carries mobility information, send the special-purpose leading request message of access at random that carries in the reallocation message to Target cell;
Target cell is received and is inserted the special-purpose leading user terminal example that matches that uses behind the request message wherein at random, to user terminal answer accidental access response message, carries this example corresponding district Radio Network Temporary Identifier in the described accidental access response message;
User terminal is received accidental access response message, detects the corresponding district Radio Network Temporary Identifier, thinks the sub-district handover success.
4. changing method as claimed in claim 3 is characterized in that, user terminal is thought and also further comprised step behind the handover success:
The message that the user terminal transmission carries user terminal identification and rebuilds upright cause value triggers the reconstruction that switches to Target cell and founds flow process to Target cell.
5. as each described changing method of claim 1 to 4, it is characterized in that, also further comprise step after reconstruction is stood successfully:
Target eNB is redistributed resource, generates new security parameter, sends to user terminal by RRC connection re-establishment message;
User terminal is according to the content in the described RRC connection re-establishment message, and the configuration local resource activates new security parameter, sends the RRC connection re-establishment to target eNB then and finishes message.
6. as each described changing method of claim 1 to 4, it is characterized in that target eNB is used switching target small area information to generate the upright information of Target cell reconstruction and is specially:
The shortMAC-I that produces according to the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of Target cell, Physical Cell Identifier and target cell information generates Target cell and rebuilds upright information.
7. a LTE system comprises source eNB, target eNB and user terminal, it is characterized in that, after described target eNB receives the handoff request of user terminal, uses switching target small area information to generate Target cell and rebuilds upright information and be kept at this locality; Described target eNB is judged when the cause value of rebuilding in the upright request is not handoff failure after receiving the upright request of reconstruction of user terminal, then uses Target cell to rebuild upright information matches user terminal, rebuilds and stands successfully.
8. LTE as claimed in claim 7 system is characterized in that, target eNB is preserved Target cell and rebuild and generate the reallocation message that carries mobility information after the upright information and send to source eNB, will pass through user terminal after this reallocation message after source eNB receives.
9. LTE as claimed in claim 8 system is characterized in that, after user terminal receives the reallocation message that carries mobility information, sends the special-purpose leading request message of access at random that carries in the reallocation message to Target cell, initiates access at random; Target cell is received and is inserted the special-purpose leading user terminal example that matches that uses behind the request message wherein at random, to user terminal answer accidental access response message, carries this example corresponding district Radio Network Temporary Identifier in the described accidental access response message; User terminal is received accidental access response message, detects the corresponding district Radio Network Temporary Identifier, thinks the sub-district handover success.
10. LTE as claimed in claim 9 system is characterized in that, user terminal sends the message that carries user terminal identification and rebuild upright cause value to Target cell, triggers the upright flow process of the reconstruction that switches to Target cell.
11. as each described LTE system of claim 7 to 10, it is characterized in that, rebuild stand successfully after, target eNB is redistributed resource, generates new security parameter, sends to user terminal by RRC connection re-establishment message; User terminal is rebuild the content of standing in the message according to described RRC, and the configuration local resource activates new security parameter, sends the RRC connection re-establishment to target eNB then and finishes message.
12. as each described LTE system of claim 7 to 10, it is characterized in that target eNB generates the upright information of Target cell reconstruction according to the shortMAC-I of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI, Physical Cell Identifier and the target cell information generation of Target cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100677920A CN102123462A (en) | 2011-03-21 | 2011-03-21 | Method and LTE (long term evolution) system for across node B handover of user terminal |
| PCT/CN2011/076376 WO2012126216A1 (en) | 2011-03-21 | 2011-06-27 | Inter-base station handover method for user terminal and long term evolution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100677920A CN102123462A (en) | 2011-03-21 | 2011-03-21 | Method and LTE (long term evolution) system for across node B handover of user terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102123462A true CN102123462A (en) | 2011-07-13 |
Family
ID=44251871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100677920A Pending CN102123462A (en) | 2011-03-21 | 2011-03-21 | Method and LTE (long term evolution) system for across node B handover of user terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102123462A (en) |
| WO (1) | WO2012126216A1 (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625471A (en) * | 2012-04-12 | 2012-08-01 | 中兴通讯股份有限公司南京分公司 | Reconstruction method and device of wireless link |
| CN102821384A (en) * | 2012-04-13 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for reestablishing wireless links |
| CN102843742A (en) * | 2012-09-20 | 2012-12-26 | 新邮通信设备有限公司 | Radio network temporary identity distributing method and system |
| CN103096398A (en) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | Method and device of network switching |
| WO2014000687A1 (en) * | 2012-06-28 | 2014-01-03 | 电信科学技术研究院 | Method, system, and device for transmitting data during access point switching process |
| CN104581924A (en) * | 2013-10-28 | 2015-04-29 | 普天信息技术研究院有限公司 | Method for converting non-competitive state of users |
| CN106604337A (en) * | 2017-02-13 | 2017-04-26 | 中国联合网络通信集团有限公司 | RRC connection rebuilding method and system |
| CN106900015A (en) * | 2015-12-18 | 2017-06-27 | 中兴通讯股份有限公司 | A kind for the treatment of method and apparatus re-established in across base station handoff procedure |
| WO2017177940A1 (en) * | 2016-04-14 | 2017-10-19 | 中兴通讯股份有限公司 | Core network selection method, apparatus and system |
| CN107659969A (en) * | 2017-09-15 | 2018-02-02 | 武汉虹信通信技术有限责任公司 | The method and device of handover success rate is improved in Rail Transit System |
| CN108521880A (en) * | 2017-08-28 | 2018-09-11 | 北京小米移动软件有限公司 | Switch the method, apparatus and system of base station |
| CN108616939A (en) * | 2016-12-21 | 2018-10-02 | 大唐移动通信设备有限公司 | A kind of radio resource control RRC re-establishes treating method and apparatus |
| CN108684217A (en) * | 2017-08-28 | 2018-10-19 | 北京小米移动软件有限公司 | Switch the method, apparatus and system of base station |
| CN109548105A (en) * | 2017-06-16 | 2019-03-29 | 华为技术有限公司 | Communication means and access network equipment, equipment of the core network |
| WO2019192514A1 (en) * | 2018-04-04 | 2019-10-10 | 维沃移动通信有限公司 | Connection reestablishment method and relevant device |
| CN110891290A (en) * | 2018-09-07 | 2020-03-17 | 大唐移动通信设备有限公司 | Method and device for reestablishing intra-cell handover |
| CN112312487A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Communication method and communication device |
| CN113543114A (en) * | 2020-04-17 | 2021-10-22 | 华为技术有限公司 | Communication method and device for multi-user identity module SIM card |
| CN113810964A (en) * | 2020-06-13 | 2021-12-17 | 华为技术有限公司 | Communication method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607852A (en) * | 2003-10-15 | 2005-04-20 | 华为技术有限公司 | Method for selecting community by multi-mode mobile terminal |
| CN101848553A (en) * | 2010-04-28 | 2010-09-29 | 新邮通信设备有限公司 | Reestablishing method of RRC (Radio Resource Control) connection in LTE (Long Term Evolution) system and base station |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616408B (en) * | 2008-06-23 | 2012-04-18 | 华为技术有限公司 | Key derivation method, key derivation device and system |
| EP2148537B1 (en) * | 2008-07-22 | 2016-05-04 | Fujitsu Limited | Handovers in wireless communication systems |
-
2011
- 2011-03-21 CN CN2011100677920A patent/CN102123462A/en active Pending
- 2011-06-27 WO PCT/CN2011/076376 patent/WO2012126216A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607852A (en) * | 2003-10-15 | 2005-04-20 | 华为技术有限公司 | Method for selecting community by multi-mode mobile terminal |
| CN101848553A (en) * | 2010-04-28 | 2010-09-29 | 新邮通信设备有限公司 | Reestablishing method of RRC (Radio Resource Control) connection in LTE (Long Term Evolution) system and base station |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9510255B2 (en) | 2011-11-08 | 2016-11-29 | Huawei Technologies Co., Ltd. | Network handover method and apparatus |
| CN103096398A (en) * | 2011-11-08 | 2013-05-08 | 华为技术有限公司 | Method and device of network switching |
| CN102625471A (en) * | 2012-04-12 | 2012-08-01 | 中兴通讯股份有限公司南京分公司 | Reconstruction method and device of wireless link |
| US9344931B2 (en) | 2012-04-12 | 2016-05-17 | Zte Corporation | Method and device for re-establishing radio link |
| CN102821384A (en) * | 2012-04-13 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for reestablishing wireless links |
| WO2014000687A1 (en) * | 2012-06-28 | 2014-01-03 | 电信科学技术研究院 | Method, system, and device for transmitting data during access point switching process |
| CN102843742B (en) * | 2012-09-20 | 2016-04-20 | 新邮通信设备有限公司 | A kind of Radio Network Temporary Identifier distribution method and system |
| CN102843742A (en) * | 2012-09-20 | 2012-12-26 | 新邮通信设备有限公司 | Radio network temporary identity distributing method and system |
| CN104581924A (en) * | 2013-10-28 | 2015-04-29 | 普天信息技术研究院有限公司 | Method for converting non-competitive state of users |
| CN106900015A (en) * | 2015-12-18 | 2017-06-27 | 中兴通讯股份有限公司 | A kind for the treatment of method and apparatus re-established in across base station handoff procedure |
| CN106900015B (en) * | 2015-12-18 | 2021-02-12 | 中兴通讯股份有限公司 | Method and device for processing reestablishment in cross-base-station switching process |
| WO2017177940A1 (en) * | 2016-04-14 | 2017-10-19 | 中兴通讯股份有限公司 | Core network selection method, apparatus and system |
| CN108616939B (en) * | 2016-12-21 | 2021-01-22 | 大唐移动通信设备有限公司 | Radio resource control RRC reestablishment processing method and device |
| CN108616939A (en) * | 2016-12-21 | 2018-10-02 | 大唐移动通信设备有限公司 | A kind of radio resource control RRC re-establishes treating method and apparatus |
| CN106604337A (en) * | 2017-02-13 | 2017-04-26 | 中国联合网络通信集团有限公司 | RRC connection rebuilding method and system |
| CN109548105A (en) * | 2017-06-16 | 2019-03-29 | 华为技术有限公司 | Communication means and access network equipment, equipment of the core network |
| CN109548105B (en) * | 2017-06-16 | 2020-03-10 | 华为技术有限公司 | Communication method, access network equipment and core network equipment |
| US11290932B2 (en) | 2017-06-16 | 2022-03-29 | Huawei Technologies Co., Ltd. | Communication method, access network device, and core network device |
| US10757624B2 (en) | 2017-06-16 | 2020-08-25 | Huawei Technologies Co., Ltd. | Communication method, access network device, and core network device |
| CN108521880B (en) * | 2017-08-28 | 2021-01-26 | 北京小米移动软件有限公司 | Method, device and system for switching base station |
| US11147003B2 (en) | 2017-08-28 | 2021-10-12 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and system for base station handover |
| US11647437B2 (en) | 2017-08-28 | 2023-05-09 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and system for base station handover |
| WO2019041098A1 (en) * | 2017-08-28 | 2019-03-07 | 北京小米移动软件有限公司 | Base station handover method, device and system |
| CN108684217A (en) * | 2017-08-28 | 2018-10-19 | 北京小米移动软件有限公司 | Switch the method, apparatus and system of base station |
| US11265782B2 (en) | 2017-08-28 | 2022-03-01 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and system for base station handover |
| CN108521880A (en) * | 2017-08-28 | 2018-09-11 | 北京小米移动软件有限公司 | Switch the method, apparatus and system of base station |
| WO2019041095A1 (en) * | 2017-08-28 | 2019-03-07 | 北京小米移动软件有限公司 | Method, apparatus, and system for base station handover |
| CN107659969B (en) * | 2017-09-15 | 2020-09-08 | 武汉虹信通信技术有限责任公司 | Method and device for improving switching success rate in rail transit system |
| CN107659969A (en) * | 2017-09-15 | 2018-02-02 | 武汉虹信通信技术有限责任公司 | The method and device of handover success rate is improved in Rail Transit System |
| CN110351805A (en) * | 2018-04-04 | 2019-10-18 | 维沃移动通信有限公司 | A kind of connection reconstruction method and relevant device |
| WO2019192514A1 (en) * | 2018-04-04 | 2019-10-10 | 维沃移动通信有限公司 | Connection reestablishment method and relevant device |
| US11690122B2 (en) | 2018-04-04 | 2023-06-27 | Vivo Mobile Communication Co., Ltd. | Connection re-establishment method and related device |
| CN110891290A (en) * | 2018-09-07 | 2020-03-17 | 大唐移动通信设备有限公司 | Method and device for reestablishing intra-cell handover |
| CN112312487A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Communication method and communication device |
| CN113543114A (en) * | 2020-04-17 | 2021-10-22 | 华为技术有限公司 | Communication method and device for multi-user identity module SIM card |
| CN113543114B (en) * | 2020-04-17 | 2022-09-23 | 华为技术有限公司 | Communication method and device for multi-user identity module SIM card |
| CN113810964A (en) * | 2020-06-13 | 2021-12-17 | 华为技术有限公司 | Communication method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012126216A1 (en) | 2012-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102123462A (en) | Method and LTE (long term evolution) system for across node B handover of user terminal | |
| CN104581843B (en) | For the processing delivering method and its communication device of the network-side of wireless communication system | |
| EP3915302B1 (en) | Method for supporting access to closed network, ue, base station and readable storage medium | |
| CN101873655B (en) | Method and device for processing radio link failure in the process of switching user terminal | |
| CN105210410B (en) | Wireless device, network node and its method that processing equipment is communicated to equipment (D2D) during switching in radio telecommunication network | |
| CN101848536B (en) | Radio resource control connection reestablishment method and base station | |
| CN107690163A (en) | Cell switching method and device | |
| CN102388654B (en) | A kind of service restoration method of cordless communication network, Apparatus and system | |
| CN101998664B (en) | Method, system and equipment for reestablishing radio resource control connection | |
| CN101951689B (en) | Radio resource control (RRC) connection reestablishment method and base station | |
| CN101848553B (en) | Reestablishing method of RRC (Radio Resource Control) connection in LTE (Long Term Evolution) system and base station | |
| CN103582124B (en) | Method, system and the equipment that a kind of business is set up | |
| CN107889172A (en) | The method, apparatus and system of cell switching | |
| CN103916917A (en) | Method, device and system for conducting switchover under bearer separation scenario | |
| CN103178938B (en) | Signaling optimization processing method, equipment and system | |
| CN105612786A (en) | User equipment and methods for fast handover failure recovery in 3gpp lte network | |
| CN101888684A (en) | Fast connection establishment method and system after reconstruction of radio resource control connection fails | |
| CN103517356A (en) | Method, system and equipment for conducting switching | |
| CN102143539A (en) | Method and system for acquiring context of terminal | |
| CN110431880A (en) | Communication system | |
| CN101986751A (en) | Method for radio resource control (RRC) connection re-establishment after switching failure and user equipment (UE) | |
| CN102333352B (en) | Method for reducing handover delay in LTE (long term evolution) system | |
| CN102215545A (en) | Method and device for re-establishing return link in relay network | |
| CN101986761A (en) | Method for keeping specific service of user after cell switching failure and user equipment (UE) | |
| CN102404809A (en) | Method and system for transferring data transmission channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110713 |