CN104144456A - Base station switching method and device - Google Patents
Base station switching method and device Download PDFInfo
- Publication number
- CN104144456A CN104144456A CN201410355832.5A CN201410355832A CN104144456A CN 104144456 A CN104144456 A CN 104144456A CN 201410355832 A CN201410355832 A CN 201410355832A CN 104144456 A CN104144456 A CN 104144456A
- Authority
- CN
- China
- Prior art keywords
- message
- source enb
- enb
- path
- switching
- 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.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a base station switching method and device in order to solve the problems that call interruption occurs and user perception is influenced due to the fact that downlink path switching fails in the current base station switching process. The base station switching method includes the steps that after a target eNB receives a switching request message sent by a source eNB and carried out admission control judgment successfully, a path switching request message is sent to an MME; the switching request message is the message sent after the source eNB receives a measurement report sent by an UE and conducts switching judgment successfully; whether downlink path switching fails or not is judged; if downlink path switching fails, a switching preparation failure message is sent to the source eNB, and the source eNB is informed to cancel the switching process according to the switching preparation failure message so that the source eNB can continue to provide service for the UE. The method and device can avoid call interruption happening to the UE, and promotes user perception.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of base station switch method and device.
Background technology
LTE (Long Term Evolution, Long Term Evolution) be by 3GPP (The3rd Generation Partnership Project, the Long Term Evolution of UMTS third generation partner program) organizing to set up (Universal Mobile Telecommunications System, universal mobile telecommunications system) technical standard.In LTE network, as UE (User Equipment, while subscriber equipment) moving, may be from certain MME (Mobility Management Entity, mobile management entity) eNB (the evolved Node B under management, evolved base station) move to another eNB, now need between two eNB, switch.
In current eNB handoff procedure, what first carry out is the Signalling exchange between UE, source eNB and target eNB; After completing Signalling exchange, then carry out the downlink path handoff procedure of eNB and Serving GW (Service Gateway, gateway), make Serving GW that downlink data is sent to target eNB.
But if the failure of downlink path handoff procedure, target eNB will discharge UE, thereby cause, in the handoff procedure of base station, call drop occurs, and affect user awareness.
Summary of the invention
The invention provides a kind of base station switch method and device, to solve in current base station handoff procedure, because downlink path handoff failure causes the problem that call drop occurs, affect user awareness.
In order to address the above problem, the invention discloses a kind of base station switch method, it is characterized in that, comprising:
Target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, to MME transmit path handover request message; Described handover request message is that source eNB is in the message that receives the measurement report of UE transmission and carry out sending after switch decision success;
Judge whether failed downlink path is switched;
If downlink path handoff failure, sends to switch to described source eNB and prepares failed message, notify described source eNB to prepare failed message according to described switching and cancel handoff procedure, so that continuing as described UE, described source eNB provides service.
Preferably, described method also comprises:
If downlink path handover success, sends switching request acknowledgement message to described source eNB, notify described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connect reconfiguration message;
Described target eNB provides service for described UE.
Preferably, describedly judge downlink path switches whether failed step comprises:
If do not receive the path switching request acknowledgement message of MME transmission, at least one in the end mark data three that the path handover request failed message of MME transmission and source eNB send, definite downlink path handoff failure in Preset Time;
If receive the path handover request failed message that MME sends in Preset Time, determine downlink path handoff failure;
If receive path switching request acknowledgement message or the end mark data of source eNB transmission, definite downlink path handover success that MME sends in Preset Time.
Preferably, described method also comprises:
In target eNB, in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
According to a further aspect in the invention, also provide a kind of base station switching device shifter, it is characterized in that, having comprised:
Request sending module, for receiving the handover request message of source eNB transmission and carrying out after acceptance controlling decision success, to MME transmit path handover request message; Described handover request message is that source eNB is in the message that receives the measurement report of UE transmission and carry out sending after switch decision success;
Judge module, for judging whether failed downlink path is switched;
Failure sending module, for when described judge module is judged downlink path handoff failure, to described source eNB, send to switch and prepare failed message, notify described source eNB to prepare failed message according to described switching and cancel handoff procedure, so that described source eNB continues as described UE, provide service.
Preferably, described device also comprises:
Confirm sending module, for when described judge module is judged downlink path handover success, to described source eNB, send switching request acknowledgement message, notify described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connect reconfiguration message;
Service module, is used to described UE that service is provided.
Preferably, described judge module comprises:
Determine submodule, for do not receive path switching request acknowledgement message that MME sends in Preset Time, the end mark data three that the path handover request failed message that MME sends and source eNB send at least one time, determine downlink path handoff failure; In Preset Time, receive that MME sends path handover request failed message time, determine downlink path handoff failure; While receiving the path switching request acknowledgement message of MME transmission or the end mark data of source eNB transmission in Preset Time, determine downlink path handover success.
Preferably, described device also comprises:
Start module, at described request sending module in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
Compared with prior art, the present invention includes following advantage:
In the present invention, target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, be not directly to source eNB, to send switching request acknowledgement message to carry out the Signalling exchange between UE, source eNB and target eNB, but to MME transmit path handover request message to carry out the downlink path handoff procedure of eNB and Serving GW.When downlink path handoff failure, target eNB sends to switch to source eNB prepares failed message, and source eNB can switch preparation failed message according to this cancels handoff procedure, continues as UE service is provided.Therefore, the present invention can avoid UE that call drop occurs, thereby promotes user awareness.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of base station switch method of the embodiment of the present invention one;
Fig. 2 is the flow chart of a kind of base station switch method of the embodiment of the present invention two;
Fig. 3 is the message flow chart of a kind of base station handover success of the embodiment of the present invention two;
Fig. 4 is the message flow chart of a kind of base station handoff failure of the embodiment of the present invention two;
Fig. 5 is the message flow chart of the another kind of base station handoff failure of the embodiment of the present invention two;
Fig. 6 is the structured flowchart of a kind of base station switching device shifter of the embodiment of the present invention three.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
In the handoff procedure of existing base station, target eNB is after receiving the handover request of source eNB transmission, carry out acceptance controlling decision, after adjudicating successfully, first target eNB sends switching request acknowledgement message to source eNB, source eNB and UE and target eNB are carried out alternately, and what first carry out is the Signalling exchange between UE, source eNB and target eNB; After completing above-mentioned Signalling exchange, target eNB, again to MME transmit path handover request message, is carried out the downlink path handoff procedure of eNB and Serving GW, makes follow-up Serving GW that downlink data is sent to target eNB.But if the failure of downlink path handoff procedure, target eNB will discharge UE, thereby cause, in the handoff procedure of base station, call drop occurs, and affect user awareness.
The present invention is directed to the problems referred to above, proposed a kind of base station switch method and device, can avoid, in the handoff procedure of base station, call drop occurs, promote user awareness.Below, by following each embodiment, a kind of base station switch method of the present invention and device are described in detail respectively.
Embodiment mono-:
With reference to Fig. 1, show the flow chart of a kind of base station switch method of the embodiment of the present invention one, the method can comprise the following steps:
Step 101, target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, to MME transmit path handover request message.
In LTE standard, with eNB, represent evolved base station, corresponding with user UE.When UE moves, may move to another eNB by an eNB from certain MME management, now need between two eNB, switch,, when scope that UE leaves source eNB moves in the scope of target eNB, need to be switched to target eNB from source eNB.
In the embodiment of the present invention, while switching in base station, source eNB can send handover request message to target eNB, and target eNB, after receiving this handover request message, will be carried out acceptance controlling decision.After adjudicating successfully, target eNB, to MME transmit path handover request message, is asked the switching of the downlink path from Serving GW to target eNB.
Step 102, judges whether failed downlink path is switched.
Target eNB, after MME transmit path handover request message, will be carried out the downlink path handoff procedure of eNB and Serving GW, so that follow-up Serving GW sends to target eNB by downlink data.But downlink path handoff procedure may be failed, this will cause target eNB to provide service for UE, so target eNB can also carry out and judge that whether failed downlink path switch process, according to judged result to determine which kind of flow process of follow-up execution.In the embodiment of the present invention, if target eNB is judged downlink path handoff failure, will carry out following step 103.
Step 103, if downlink path handoff failure sends to switch to source eNB and prepares failed message, notifies described source eNB to prepare failed message according to described switching and cancels handoff procedure, so that described source eNB continues as described UE, provides service.
If judge downlink path handoff failure in step 102, target eNB will send to switch to source eNB and prepare failed message, to notify described source eNB to prepare failed message according to described switching, cancel handoff procedure, make described source eNB continue as described UE service is provided.Source eNB prepares after failed message receiving described switching, learns to switch and prepares unsuccessfully, and target eNB cannot provide service for UE, UE cannot be switched to target eNB, and therefore, source eNB can continue as described UE service is provided.
In the embodiment of the present invention, target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, be not directly to source eNB, to send switching request acknowledgement message to carry out the Signalling exchange between UE, source eNB and target eNB, but to MME transmit path handover request message to carry out the downlink path handoff procedure of eNB and Serving GW.When downlink path handoff failure, target eNB sends to switch to source eNB prepares failed message, and source eNB can, cancelling handoff procedure according to this switching preparation failed message, continue as UE service is provided.Therefore, the present invention can avoid UE that call drop occurs, thereby promotes user awareness.
Embodiment bis-:
With reference to Fig. 2, show the flow chart of a kind of base station switch method of the embodiment of the present invention two, the method can comprise the following steps:
Step 201, target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, to MME transmit path handover request message.
The switching of base station can comprise handover measurement, switch decision and switching execution three phases.
Measuring phases: first source eNB can send and measure control message to UE, controls UE and measures.Between UE and source eNB, set up RRC (Radio Resource Control, Radio Resource control) after connecting, source eNB can connect reconfiguration message sending measuring configuration information by RRC, when needs are measured Serving cell, source eNB can issue the measurement configuration information of Serving cell.Source eNB can measure type with frequency, alien frequencies, different system etc. for UE configuration, and measurement parameter can comprise measuring object, report configured list, measures sign, measure interval etc.Wherein, for frequently same and different-frequency measure, measuring object is a single E-UTRA (Evolved Universal Terrestrial Radio Access, the UMTS land face wireless access of evolution) carrying frequency; Report configured list can comprise many report configurations, in report configured list, each report configuration comprises again report criterion and reporting format information, report criterion can be periodic or event, the reporting format indication report amount that UE comprises in measurement report and relevant information (for example quantity of reporting cell); Measure the cycle that interval indication UE measures.After with frequency handover trigger, source eNB issues the measurement configuration information of homogeneous-frequency adjacent-domain; After different frequency/different system handover trigger, source eNB issues different frequency/different system nearby region measurement configuration information, carries out different frequency/different system measurement.
UE measures after the measurement control message that receives source eNB transmission, and sends measurement report to source eNB.Measurement report can configuration packet containing the relevant parameter of handover event, source eNB can apply reporting of following Event triggered UE: event A1, represent that Serving cell quality is higher than certain thresholding, just reporting measurement reports of UE when meeting trigger conditions, source eNB stops different frequency/different system measurement; Event A2, represents that Serving cell quality is lower than certain thresholding, just reporting measurement reports of UE when meeting trigger conditions, and source eNB starts different frequency/different system measurement; Event A3, represents that with frequency/alien frequencies adjacent area quality, compare Serving cell quality exceeds certain thresholding, and when meeting the cell information of trigger conditions and be reported, source eNB starts frequency/alien frequencies handover request together; Event A4, represents that alien frequencies adjacent area quality is higher than certain thresholding, and when the cell information that meets trigger conditions is reported, source eNB starts alien frequencies handover request; Event A5, represents that Serving cell quality is lower than certain thresholding, and alien frequencies adjacent area quality is higher than certain thresholding simultaneously, and when the cell information that meets trigger conditions is reported, source eNB starts alien frequencies handover request.
The judgement stage: source eNB, after receiving the measurement report that UE reports, by control and carry out switch decision process, carries out evaluation decision to UE reported result, obtains the community that meets event condition, generates switching target small area list according to measure signal intensity.For generating, cell filtering is carried out in switching target small area list and priority ordering is processed.Source eNB, according to switching target small area tab sequential, sends handover request to Target cell, when handover request failure, source eNB can send handover request to next Target cell.If all attempted all communities in measurement report, wait for that UE sends measurement report next time.
Execution phase: after source eNB carries out the Target cell in switch decision success selected target eNB, this source eNB will send handover request message to target eNB, and target eNB, after receiving this handover request message, will be carried out acceptance controlling decision.After acceptance controlling decision success, can control UE and be switched to target eNB from source eNB, finally complete switching.
In the embodiment of the present invention, target eNB is after acceptance controlling decision success, be not directly to source eNB, to send switching request acknowledgement message to carry out the Signalling exchange between UE, source eNB and target eNB, but the switching of the downlink path from Serving GW to target eNB with request to MME transmit path handover request message, the object that downlink path is switched is that notice Serving GW issues target eNB by downlink data.
Step 202, judges whether failed downlink path is switched.
In carrying out the downlink path handoff procedure of eNB and Serving GW, this downlink path handoff procedure may be failed.Downlink path handoff failure can comprise following situation:
(1) with reference to agreement 3GPP TS36.413, if there is mistake in MME in notice Serving GW upgrades load bearing process, will be to target eNB Response Path handover request failed message.For example, in execution route conversion request process, for being included in E-RAB (Evolved Radio Access Bearer, all E-RAB in the IE list of the down link that the RAB of evolution) will switch (E-RAB To Be Switched in Downlink List IE), if EPC is (Evolved Packet Core, Evolved Packet Core) change descending GTP (GPRS (General Packet Radio Service, general packet radio service technology) Tunnelling Protocol, GPRS Tunnel Protocol) tunnel nodes is a new GTP tunnel node failure, MME will send a path handover request failed message with corresponding cause value to target eNB so.If MME receives a paths, switch message, comprise some E-RAB ID IE (in E-RAB To Be Switched in Downlink List IE) that are set to identical value, MME will be to target eNB transmit path handover request failed message so.
(2) target eNB has been after having sent path handover request message to MME, if do not receive the acknowledge message of MME in Preset Time, and downlink path handoff failure.This kind of situation may be because MME does not have reverse-path switching request acknowledgement message, or because MME does not receive the path handover request message that target eNB sends, etc.
Downlink path handoff procedure failure, will cause target eNB to provide service for UE, so target eNB can also carry out and judge the whether failed process of downlink path switching, according to judged result to determine which kind of flow process of follow-up execution.In the embodiment of the present invention, if target eNB is judged downlink path handoff failure, perform step 203; If target eNB is judged downlink path handover success, perform step 204.
In a preferred embodiment of the present invention, describedly judge downlink path switches whether failed step can comprise following sub-step:
Sub-step a1, if the path switching request acknowledgement message that does not receive MME transmission in Preset Time is, at least one in the end mark data three that the path handover request failed message of MME transmission and source eNB send, definite downlink path handoff failure;
If both do not received the path switching request acknowledgement message that MME sends in Preset Time, do not receive the path handover request failed message that MME sends yet, do not receive the end mark data that source eNB sends, determine downlink path handoff failure yet.
Sub-step a2, if receive the path handover request failed message that MME sends in Preset Time, determines downlink path handoff failure;
Sub-step a3, if receive path switching request acknowledgement message or the end mark data of source eNB transmission, the definite downlink path handover success that MME sends in Preset Time.
In the embodiment of the present invention, can to Preset Time, control by timer or other modes that can set arbitrarily Preset Time.If adopt timer to carry out set of time, the base station switch method in the embodiment of the present invention can also comprise: in target eNB in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
For the concrete numerical value of above-mentioned Preset Time, those skilled in the art are according to the practical experience setting of being correlated with, and the embodiment of the present invention is not limited concrete numerical value.
Step 203, sends to switch to source eNB and prepares failed message, notifies described source eNB to prepare failed message according to described switching and cancels handoff procedure, so that described source eNB continues as described UE, provides service.
If judge downlink path handoff failure in step 202, target eNB will send to switch to source eNB and prepare failed message, to notify described source eNB to prepare failed message according to described switching, cancel handoff procedure, make described source eNB continue as described UE service is provided.Source eNB prepares, after failed message, to learn that target eNB cannot provide service for UE receiving described switching, so source eNB can cancel the switching from source eNB to target eNB, continues as described UE service is provided.For the communication process between follow-up UE and source eNB, source eNB provides the detailed process of service for UE, and those skilled in the art carry out relevant treatment according to practical experience, and the embodiment of the present invention is discussed no longer in detail to this.
Wherein, when UE initially accesses source eNB, will set up UE and be connected with the RRC between the eNB of source, for the detailed process of setting up UE and being connected with RRC between the eNB of source, those skilled in the art carry out relevant treatment according to practical experience, and the embodiment of the present invention is discussed no longer in detail to this.
In above-mentioned steps 202, point out, in the situation of downlink path handoff failure, target eNB may receive the path handover request failed message that MME sends before timer expiry, also may before timer expiry, not receive any message.Therefore, in the embodiment of the present invention, target eNB can also comprise failure cause in source eNB send to switch prepares failed message, and this failure cause can make a mistake or without response, source eNB can carry out corresponding operation according to different failure causes for switching.
For example, if described failure cause makes a mistake for switching, can determine that MME and Serving GW have all received corresponding message, and carried out downlink path handoff procedure, just in handoff procedure, there is mistake, therefore Serving GW can still keep and source eNB between carry out the downlink path of transfer of data, in this kind of situation, source eNB can directly cancel the switching from source eNB to target eNB.
If described failure cause is not response, can not determine it is which kind of reason causes target eNB not receive the response of MME, therefore in this kind of situation, source eNB can be to MME transmit path handover request message, this message can be carried for the address of the source eNB of downlink user face and TEID (Tunnel Endpoint ID, tunnel endpoint identifier), downlink data path is switched in request, and user's face is transferred to source eNB from target eNB.Source eNB can pay close attention to the path switching request acknowledgement message of whether receiving that MME sends afterwards.
Step 204, sends switching request acknowledgement message to source eNB, notifies described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connects reconfiguration message.
If judge downlink path handover success in step 202, target eNB will send switching request acknowledgement message to notify described source eNB to send RRC connection reconfiguration message according to described switching request acknowledgement message to described UE to source eNB.
In the embodiment of the present invention, source eNB, after receiving described switching request acknowledgement message, learns that target eNB can provide service for UE.First can send RRC to UE and connect reconfiguration message; Then source eNB sends SN (Serial Number to target eNB, sequence number) state transitions message, by up PDCP SN (Packet Data Convergence Protocol Serial Number, PDCP sequence number) and HFN (Hyper Frame Number, Hyper Frame Number) receiver state and descending PDCP SN and HFN transmitter state, from source, eNB transfers to target eNB; UE sends RRC connection and has reshuffled message to target eNB.Succeeding target eNB sends UE context release message to source eNB, and notification source eNB switching completes, and trigger source eNB releasing resource; Source eNB, after receiving UE context release message, can be released to the resource that described UE distributes.
Step 205, described target eNB provides service for described UE.
Send RRC and connect and reshuffled after message receiving UE, target eNB can be described UE service is provided.For the communication process between follow-up UE and target eNB, target eNB provides the detailed process of service for UE, and those skilled in the art carry out relevant treatment according to practical experience, and the embodiment of the present invention is discussed no longer in detail to this.
In a preferred embodiment of the present invention, before described target eNB provides the step of service for described UE, can also comprise: target eNB receives the described source eNB data relevant to described UE that send, that this source eNB has received.It is the process of all right executing data forward of source eNB.Data forwarding refers to, before downlink path is switched, Serving GW has been handed down to source eNB by partial data, because after downlink path is switched, target eNB will become service eNB, therefore source eNB need to, by the data forwarding relevant to described UE having received to target eNB, also not send to the data distributing of UE to user source eNB by target eNB.
Below, in conjunction with Fig. 3～Fig. 5, the message flow while introducing respectively base station handover success and handoff failure.
Fig. 3 is the message flow chart of a kind of base station handover success of the embodiment of the present invention two.This flow process specifically describes as follows:
1, source eNB sends Measurement Control (measure and control) message, the measurement of configuration UE to UE.Between source eNB and Serving GW, carry out afterwards between UE and source eNB, the exchange of Packet data (grouped data).Wherein, L3singnalling refers to layer 3 signaling, and User data is user data.
2, UE sends Measurement Report (measurement report) to source eNB.
3, source eNB is according to measurement report and RRM (Radio Resource Management, RRM) strategy execution HO decision (switch decision) process.
4, source eNB, after switch decision success, sends Handover Request (handover request) message to target eNB, so that target eNB is done to switch, prepares.
5, target eNB is carried out Admission Control (receive and control) process.
6, target eNB, after acceptance controlling decision success, sends Path Switch Request (path handover request) message to MME.This message is carried for the address of the target eNB of downlink user face and TEID, and downlink data path is switched in request, and user's face is transferred to target eNB from source eNB.
7, MME sends Modify Bearer Request (revising carrying request) message to Serving GW.This message is carried for the address of the target eNB of downlink user face and TEID.
8, Serving GW completes Switch DL path (downlink path switching) according to address and the TEID information of the target eNB of receiving.Can also send one or more End marker (end mark) data to original S1-U path of pointing to source eNB afterwards, for characterizing the termination of the carrying data flow on this tunnel.
9, Serving GW sends Modify Bearer Response (revising carrying response) message to MME, indicating downlink path handover success.
10, target eNB can start timer after sending Path Switch Request message, target eNB receives Path Switch Request Ack (path Handover Request Acknowledge) message that MME sends before timer expiry, and downlink path handover success is described.When not switching downlink path, that Serving GW is known is transport address and the TEID of source eNB, while issuing data to address that should source eNB, by path handoff procedure, Serving GW has been known transport address and the TEID of target eNB, and Serving GW just can issue target eNB downlink data like this.
11, target eNB receives after Path Switch Request Ack message, to source eNB, sends Handover Request Ack (Handover Request Acknowledge) message.
12, source eNB switches indication to UE transmission RRC Connection Reconfiguration (RRC connection is reshuffled) message.
13, source eNB is by sending SN Status Transfer (SN state transitions) message to target eNB, and by up PDCP SN and HFN receiver state and descending PDCP SN and HFN transmitter state, from source, eNB transfers to target eNB.Source eNB can also carry out Data forwarding (data forwarding) process, and the data forwarding relevant to UE that source eNB is received is to target eNB.
Source eNB is by sending to the SN Status Transfer message of target eNB to carry the up PDCP SN receiving-end state that up PDCP state remains for E-RAB in advance, and descending PDCP SN transmitting terminal state.The state of up PDCP SN receiving terminal at least comprises the sequence number of the up PDCP SDU of first loss, also may include out of order up SDU (service Data Unit, the state bitmap of receiving terminal service data unit), if comprise these SDU, need to retransmit in Target cell these up SDU.With the state of descending PDCP SN transmitting terminal, carry out indicating target eNB to distribute to there is no the next PDCP SN of the new SDU of PDCP SN.This process is mainly used in the forward of leading subscriber face data, and the data that make target eNB understand source eNB while switching send state.
14, UE sends RRC Connection Reconfiguration Complete (RRC connection has been reshuffled) message to target eNB.
15, target eNB is received after RRC Connection Reconfiguration Complete message, by sending UE Context Release (release of UE context) message informing source eNB switching, complete, and trigger source eNB releasing resource.
16, source eNB receives after UE Context Release message, carries out Release Resources (releasing resource) process, distributes to the related resource of UE before discharging.Source eNB, after receiving End marker data, can, by End marker data retransmission to target eNB, for assisting the data sorting in target eNB, can also carry out Data forwarding process.After having switched, target eNB provides service for UE, between UE and target eNB, carry out the exchange of Packet data between target eNB and Serving GW.
Fig. 4 is the message flow chart of a kind of base station handoff failure of the embodiment of the present invention two.This kind of situation refers to that failure cause is to switch situation about making a mistake.This flow process specifically describes as follows:
1, source eNB sends Measurement Control message, the measurement of configuration UE to UE.
2, UE sends Measurement Report to source eNB.
3, source eNB is according to measurement report and RRM strategy execution HO decision process.
4, source eNB, after switch decision success, sends Handover Request message to target eNB.
5, target eNB is carried out Admission Control process.
6, target eNB, after acceptance controlling decision success, sends Path Switch Request message to MME.This message is carried for the address of the target eNB of downlink user face and TEID, and downlink data path is switched in request, and user's face is transferred to target eNB from source eNB.
7, MME sends Modify Bearer Request message to Serving GW.This message is carried for the address of the target eNB of downlink user face and TEID.
8, there is mistake in Serving GW in upgrading load bearing process, determines Switch DL path Failure (downlink path handoff failure).
9, Serving GW sends Modify Bearer Response message to MME, carries failure cause and make a mistake for switching in this message.
10, target eNB can start timer after sending Path Switch Request message, target eNB receives Path Switch Request Failure (failure of the path handover request) message that MME sends before timer expiry, downlink path handoff failure is described, in this message, carries failure cause and make a mistake for switching.
11, target eNB receives after Path Switch Request Failure message, to source eNB, sends Handover Preparation Failure (switch and prepare unsuccessfully) message, carries failure cause and make a mistake for switching in this message.
12, source eNB receives after Handover Preparation Failure message, carries out HO Cancel (cancel and switching) process, continues as this UE service is provided.Between UE and source eNB, between source eNB and Serving GW, carry out the exchange of Packet data.
Fig. 5 is the message flow chart of the another kind of base station handoff failure of the embodiment of the present invention two.This kind of situation refers to that failure cause is the situation without response.This flow process specifically describes as follows:
1, source eNB sends Measurement Control message, the measurement of configuration UE to UE.
2, UE sends Measurement Report to source eNB.
3, source eNB is according to measurement report and RRM strategy execution HO decision process.
4, source eNB, after switch decision success, sends Handover Request message to target eNB.
5, target eNB is carried out Admission Control process.
6, target eNB, after acceptance controlling decision success, sends Path Switch Request message to MME.This message is carried for the address of the target eNB of downlink user face and TEID, and downlink data path is switched in request, and user's face is transferred to target eNB from source eNB.
7, target eNB can start timer after sending Path Switch Request message, target eNB is not received the Path Switch Request Ack message of MME transmission or the Path Switch Request Failure message that MME sends before timer expiry, or, the End marker data that source eNB sends, thus Timer is out (timer expiry).It should be noted that, if target eNB has been received the End marker data that source eNB sends before timer expiry, because these data are that Serving GW sends, therefore can illustrate that core network has now completed the switching of downlink path, therefore can carry out normal flow, be that target eNB sends Handover Request Ack message to source eNB, specifically referring to the step 11-step 16 in Fig. 3.
8, target eNB sends Handover Preparation Failure message to source eNB, and this message is carried failure cause for nothing response.
9, source eNB receives after the Handover Preparation Failure message of target eNB transmission, to MME, sends Path Switch Request message.This message is carried address and the TEID for the source eNB of downlink user face, and downlink data path is switched in request, and user's face is transferred to source eNB from target eNB, and source eNB is without paying close attention to the Path Switch Request Ack message of whether receiving that MME sends afterwards.
10, source eNB carries out HO Cancel (cancel and switching) process, continues as this UE service is provided.Between UE and source eNB, between source eNB and Serving GW, carry out the exchange of Packet data.
In the flow process shown in above-mentioned Fig. 5, target eNB and source eNB may send Path Switch Request message to MME, are analyzed as follows:
(1) if MME has received the Path Switch Request message that target eNB sends, but target eNB is not received Path Switch Request Ack or Path Switch Request Failure message that MME sends, and received the End marker data that source eNB sends, now target eNB can, according to the End marker data that receive, complete normal handoff procedure.
(2) if MME does not receive the Path Switch Request message that target eNB sends, but received the Path Switch Request message that source eNB sends, user just can continue to accept service at source eNB.
(3) if MME has both received target eNB, also do not receive the Path Switch Request message that source eNB sends, user also can continue to accept service at source eNB.
Base station switch method described in the embodiment of the present invention, in the situation that switching to target eNB failure by source eNB, source eNB can continue as user service is provided, thereby can greatly reduce the probability that switches call drop, improves user awareness.
For aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
Embodiment tri-:
With reference to Fig. 6, show the structured flowchart of a kind of base station switching device shifter of the embodiment of the present invention three.This device can comprise with lower module:
Request sending module 601, for receiving the handover request message of source eNB transmission and carrying out after acceptance controlling decision success, to MME transmit path handover request message; Described handover request message is that source eNB is in the message that receives the measurement report of UE transmission and carry out sending after switch decision success;
Judge module 602, for judging whether failed downlink path is switched;
Failure sending module 603, for when described judge module is judged downlink path handoff failure, to source eNB, send to switch and prepare failed message, notify described source eNB to prepare failed message according to described switching and cancel handoff procedure, so that described source eNB continues as described UE, provide service.
In a preferred embodiment of the present invention, described device can also comprise with lower module:
Confirm sending module, for when described judge module is judged downlink path handover success, to source eNB, send switching request acknowledgement message, notify described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connect reconfiguration message;
Receiver module, before providing service at service module for described UE, receives the described source eNB data relevant to described UE that send, that this source eNB has received;
Service module, is used to described UE that service is provided.
In a preferred embodiment of the present invention, described judge module can comprise following submodule:
Determine submodule, for do not receive path switching request acknowledgement message that MME sends in Preset Time, the end mark data three that the path handover request failed message that MME sends and source eNB send at least one time, determine downlink path handoff failure; In Preset Time, receive that MME sends path handover request failed message time, determine downlink path handoff failure; While receiving the path switching request acknowledgement message of MME transmission or the end mark data of source eNB transmission in Preset Time, determine downlink path handover success.
Described device can also comprise with lower module:
Start module, at described request sending module in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
In the embodiment of the present invention, target eNB is receiving the handover request message that source eNB sends and is carrying out after acceptance controlling decision success, first to MME transmit path handover request message to carry out the downlink path handoff procedure of eNB and Serving GW.When downlink path handoff failure, target eNB sends to switch to source eNB prepares failed message, and source eNB can switch preparation failed message according to this cancels handoff procedure, continues as UE service is provided.Therefore, the embodiment of the present invention can avoid UE that call drop occurs, thereby promotes user awareness.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
The present invention can describe in the general context of the computer executable instructions of being carried out by computer, for example program module.Usually, program module comprises the routine carrying out particular task or realize particular abstract data type, program, object, assembly, data structure etc.Also can in distributed computing environment (DCE), put into practice the present invention, in these distributed computing environment (DCE), by the teleprocessing equipment being connected by communication network, be executed the task.In distributed computing environment (DCE), program module can be arranged in the local and remote computer-readable storage medium that comprises memory device.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
Above to a kind of base station switch method provided by the present invention and device, be described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (8)
1. a base station switch method, is characterized in that, comprising:
Target eNB is receiving the handover request message of source eNB transmission and is carrying out after acceptance controlling decision success, to MME transmit path handover request message; Described handover request message is that source eNB is in the message that receives the measurement report of UE transmission and carry out sending after switch decision success;
Judge whether failed downlink path is switched;
If downlink path handoff failure, sends to switch to described source eNB and prepares failed message, notify described source eNB to prepare failed message according to described switching and cancel handoff procedure, so that continuing as described UE, described source eNB provides service.
2. method according to claim 1, is characterized in that, also comprises:
If downlink path handover success, sends switching request acknowledgement message to described source eNB, notify described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connect reconfiguration message;
Described target eNB provides service for described UE.
3. method according to claim 1 and 2, is characterized in that, describedly judges downlink path switches whether failed step comprises:
If do not receive the path switching request acknowledgement message of MME transmission, at least one in the end mark data three that the path handover request failed message of MME transmission and source eNB send, definite downlink path handoff failure in Preset Time;
If receive the path handover request failed message that MME sends in Preset Time, determine downlink path handoff failure;
If receive path switching request acknowledgement message or the end mark data of source eNB transmission, definite downlink path handover success that MME sends in Preset Time.
4. method according to claim 3, is characterized in that, also comprises:
In target eNB, in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
5. a base station switching device shifter, is characterized in that, comprising:
Request sending module, for receiving the handover request message of source eNB transmission and carrying out after acceptance controlling decision success, to MME transmit path handover request message; Described handover request message is that source eNB is in the message that receives the measurement report of UE transmission and carry out sending after switch decision success;
Judge module, for judging whether failed downlink path is switched;
Failure sending module, for when described judge module is judged downlink path handoff failure, to described source eNB, send to switch and prepare failed message, notify described source eNB to prepare failed message according to described switching and cancel handoff procedure, so that described source eNB continues as described UE, provide service.
6. device according to claim 5, is characterized in that, also comprises:
Confirm sending module, for when described judge module is judged downlink path handover success, to described source eNB, send switching request acknowledgement message, notify described source eNB to described UE, to send RRC according to described switching request acknowledgement message and connect reconfiguration message;
Service module, is used to described UE that service is provided.
7. according to the device described in claim 5 or 6, it is characterized in that, described judge module comprises:
Determine submodule, for do not receive path switching request acknowledgement message that MME sends in Preset Time, the end mark data three that the path handover request failed message that MME sends and source eNB send at least one time, determine downlink path handoff failure; In Preset Time, receive that MME sends path handover request failed message time, determine downlink path handoff failure; While receiving the path switching request acknowledgement message of MME transmission or the end mark data of source eNB transmission in Preset Time, determine downlink path handover success.
8. device according to claim 7, is characterized in that, also comprises:
Start module, at described request sending module in MME transmit path handover request message, start the timer setting in advance, the timing of described timer is described Preset Time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355832.5A CN104144456B (en) | 2014-07-24 | 2014-07-24 | A kind of base station switch method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355832.5A CN104144456B (en) | 2014-07-24 | 2014-07-24 | A kind of base station switch method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104144456A true CN104144456A (en) | 2014-11-12 |
| CN104144456B CN104144456B (en) | 2017-12-08 |
Family
ID=51853504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355832.5A Active CN104144456B (en) | 2014-07-24 | 2014-07-24 | A kind of base station switch method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104144456B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872850A (en) * | 2016-09-27 | 2018-04-03 | 中国移动通信有限公司研究院 | A kind of method for handover control, terminal, source base station and target BS |
| CN108616938A (en) * | 2016-12-12 | 2018-10-02 | 中国移动通信有限公司研究院 | A kind of VOLTE business switch methods and device |
| CN111093233A (en) * | 2018-10-24 | 2020-05-01 | 中国移动通信有限公司研究院 | Switching control method, device and base station |
| CN113133071A (en) * | 2020-01-16 | 2021-07-16 | 大唐移动通信设备有限公司 | Data forwarding method and base station |
| WO2022218267A1 (en) * | 2021-04-14 | 2022-10-20 | 维沃移动通信有限公司 | Transmission switching method, terminal, and network side device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835221A (en) * | 2010-04-28 | 2010-09-15 | 新邮通信设备有限公司 | Subdistrict switching method and base station |
| CN101867984A (en) * | 2010-02-26 | 2010-10-20 | 新邮通信设备有限公司 | Switching method, donor base station and relay node in long-term evolution enhancement system |
| CN101931987A (en) * | 2009-06-25 | 2010-12-29 | 大唐移动通信设备有限公司 | Base station switching method, device and system |
| WO2011136534A2 (en) * | 2010-04-28 | 2011-11-03 | Samsung Electronics Co., Ltd. | A handover method and apparatus in a mobile communication system |
| CN102598786A (en) * | 2011-11-11 | 2012-07-18 | 华为技术有限公司 | Switching method between base stations, base stations and communication system |
| CN102905328A (en) * | 2011-07-27 | 2013-01-30 | 中兴通讯股份有限公司 | Method and system for handing over UE (user equipment) to hybrid cell and base station |
-
2014
- 2014-07-24 CN CN201410355832.5A patent/CN104144456B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931987A (en) * | 2009-06-25 | 2010-12-29 | 大唐移动通信设备有限公司 | Base station switching method, device and system |
| CN101867984A (en) * | 2010-02-26 | 2010-10-20 | 新邮通信设备有限公司 | Switching method, donor base station and relay node in long-term evolution enhancement system |
| CN101835221A (en) * | 2010-04-28 | 2010-09-15 | 新邮通信设备有限公司 | Subdistrict switching method and base station |
| WO2011136534A2 (en) * | 2010-04-28 | 2011-11-03 | Samsung Electronics Co., Ltd. | A handover method and apparatus in a mobile communication system |
| CN102905328A (en) * | 2011-07-27 | 2013-01-30 | 中兴通讯股份有限公司 | Method and system for handing over UE (user equipment) to hybrid cell and base station |
| CN102598786A (en) * | 2011-11-11 | 2012-07-18 | 华为技术有限公司 | Switching method between base stations, base stations and communication system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107872850A (en) * | 2016-09-27 | 2018-04-03 | 中国移动通信有限公司研究院 | A kind of method for handover control, terminal, source base station and target BS |
| CN108616938A (en) * | 2016-12-12 | 2018-10-02 | 中国移动通信有限公司研究院 | A kind of VOLTE business switch methods and device |
| CN111093233A (en) * | 2018-10-24 | 2020-05-01 | 中国移动通信有限公司研究院 | Switching control method, device and base station |
| CN113133071A (en) * | 2020-01-16 | 2021-07-16 | 大唐移动通信设备有限公司 | Data forwarding method and base station |
| WO2022218267A1 (en) * | 2021-04-14 | 2022-10-20 | 维沃移动通信有限公司 | Transmission switching method, terminal, and network side device |
| CN115226165A (en) * | 2021-04-14 | 2022-10-21 | 维沃移动通信有限公司 | Transmission switching method, terminal and network side equipment |
| CN115226165B (en) * | 2021-04-14 | 2024-05-07 | 维沃移动通信有限公司 | Transmission switching method, terminal and network side equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104144456B (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113453272B (en) | Switching method and device in sidelink relay architecture | |
| CN108024295B (en) | Relay transfer method and device, terminal and base station | |
| CN105848222B (en) | Method and base station equipment for switching | |
| CN105103598B (en) | Operate the method and relevant network node of wireless access network base station | |
| CN110519807B (en) | Communication method and device | |
| EP4152819A1 (en) | Handover method and apparatus, user equipment, and network device | |
| JP5012892B2 (en) | Mobile communication system and communication method | |
| CN102238666B (en) | Multi-carrier switch processing method and system | |
| US11452157B2 (en) | Communication connection control in a non-homogenous network scenario | |
| US8817752B2 (en) | Method and apparatus for determining matching of inter-cell reselection parameters and handover parameters | |
| CN102123460B (en) | Method for realizing group calling service handover in trunked mobile communication system | |
| WO2020057732A1 (en) | Communication connection control using conditional handover | |
| CN105432116B (en) | Method, base station and the system of cell switching | |
| CN102421152B (en) | Method and device for identifying bearing type | |
| CN105191402A (en) | Adapting a mobile network | |
| CN104301955A (en) | Method for switching base stations for user equipment (UE), base stations and UE | |
| MX2011000905A (en) | Method and mobility management entity for acquiring bearer status at the time of user equipment switching. | |
| CN104144456A (en) | Base station switching method and device | |
| CN103796262A (en) | Direct switching method and apparatus | |
| CN112584453A (en) | Main node, auxiliary node and user equipment in mobile communication network and communication method thereof | |
| CN103442399A (en) | Network switching method, network switching system and terminal | |
| CN104640165A (en) | Data transmission method, equipment and system | |
| CN104113918A (en) | Method and device for bearer information interaction in the process of handover | |
| JPWO2017026441A1 (en) | COMMUNICATION METHOD, CELLULAR BASE STATION, AND WIRELESS LAN TERMINAL NODE | |
| JP2015527777A (en) | Source side, target side switching communication device, communication system, and call switching method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |