CN102238653B - Method, device and system for controlling cell handover in evolved NodeB (eNB) - Google Patents
Method, device and system for controlling cell handover in evolved NodeB (eNB) Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for controlling cell handover in an evolved NodeB (eNB). The method, the device and the system are used for realizing the handover of user equipment (UE) between cells in the eNB supporting a closed subscriber group (CSG). The method comprises that: when determining the handover of the UE to the internal target cell is required according to a measurement report, the eNB directly performs handover processing locally if the target cell is determined to be an open cell or a CSG identifier (ID) of the target cell is determined to be the same as that of a source cell according to the CSG related information of the target cell, or the eNB transmits the CSG related information of the target cell to a mobility management entity (MME) for judgment, and executes corresponding handover processing according to a judgment result returned by the MME if the CSG ID of the target cell is determined to be different from that of the source cell. Therefore, the handover of the UE between the cells in the eNB is realized. The invention simultaneously discloses the device and the system for controlling the cell handover in the eNB.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method, Apparatus and system of controlling the switching of eNB internal zone.
Background technology
In the TD-SCDMA system, encapsulation user group (Closed Subscriber Group, CSG) community can only allow certain customers' access, can only provide service for the specific user, when the initial access of user and switching, the evolution base station (eNB) of administration CSG need to carry out the CSG access control to it.
In practical application, in certain travelling carriage (UE), default encapsulation user organizes and allows the CSG ID Shi，Gai community that comprises a certain community in list (allowed CSGlist) just to allow this UE access.Allowed CSG list needs to safeguard in MME side and UE side, like this, UE is when initial access and switching, could select to allow the CSG community of access, simultaneously, MME also could select to be checked in the DuiUE community, to guarantee that UE can illegally not access not the to one's name CSG community of Allowed CSG list.
At present, support the eNB of CSG that three kinds of access modules are arranged: close mode, open mode and hybidmode.Wherein Close mode refers to that cell operation under eNB is under the CSG pattern, only has in allowedCSG list the UE that comprises this community CSG ID just to allow access; Hybrid mode refers to, the eNBXia community both can be operated under the CSG pattern, can be operated in general mode again, in allowed CSG list, do not comprise the UE of this CSG ID and also can access without the UE of allowed CSG list; Under Open Mode, eNB works in the non-CSG mode, and CSG ID is not set, and all UE can access.
The process that in existing protocol, UE is switched between eNB by the S1 interface, comprise the switching set-up procedure and switch needed resource allocation process.
Consult shown in Fig. 1, in the switching set-up procedure, source eNB prepares needed resource by Evolved Packet Core (evolvedpacket core network, EPC) request MME, comprising:
Step 1: source eNB is by sending handover request (HANDOVERREQUIRED) message trigger switching flow process to serving MME, source eNB opens the TS1RELOCprep timer.
Source eNB comprises the transparent vessel (Source to Target Transparent Container IE) of source to target in handover request (HANDOVER REQUIRED) message.If intra-system handover, the coding of this IE is the transparent vessel (Source eNB to Target eNBTransparent Container IE) to target eNB with reference to source enb.If be switched to global terrestrial wireless access (Universal Terrestrialradio Access Network, UTRAN), the coding of this IE is with reference to Source RNC to Target RNCTransparent Container IE.If be switched to global system for mobile communications/increase type data rate GSM evolution system wireless access network (GSM/EDGE RAN) pattern, the coding of this IE arrives target BS S transparent vessel (Source BSS to Target BSS Transparent Container IE) with reference to source BSS.
Step 2: (comprise reserved resource) when target eNB is ready to switch, MME will return to switching command (HANDOVER COMMAND) message to source eNB.
Consult shown in Fig. 2, resource allocation process comprises:
Step 1:MME sends handover request (HANDOVER REQUEST) message trigger switching flow to target eNB, may comprise switching restriction list (Handover Restriction List IE) in this message, after target eNB is received this information, it is kept in the UE context, for making switch decision.
Step 2: when target eNB is, after RAB (E-RAB) that acceptable strengthens distributes necessary resource, to MME, to send switching request response (HANDOVER REQUESTACKNOWLEDGE) message,
Carry following two kinds of parameters in HANDOVER REQUEST ACKNOWLEDGE message:
Allow the E-RAB (E-RABs Admitted List IE) of access, the E-RAB of the resource that comprises the target eNB preparation,
Set up failed E-RAB (E-RABs Failed to Setup List IE), comprise the E-RAB do not accepted by target eNB, and carry suitable cause value.
Yet, in existing agreement only in the situation that MME carries out the CSG access control, the flow process that UE is switched between the eNB that supports CSG is described, and the flow process that UE is switched between the internal zone of same eNB administration is not put down in writing, therefore, need to provide a kind of method, for realizing the switching of UE between the internal zone of the eNB that supports CSG.
Summary of the invention
The invention provides a kind of method, Apparatus and system of the eNB of control internal zone switching, for realizing the switching of UE between the eNB internal zone of supporting CSG.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A kind of method of controlling the switching of eNB internal zone comprises:
When eNB need switch to inner Target cell by UE according to measurement report is definite, obtain the CSG relevant information of described Target cell;
It is pre-conditioned that eNB judges according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
A kind of device of controlling the switching of eNB internal zone comprises:
Acquiring unit, in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the CSG relevant information of described Target cell;
Judging unit, judge for the CSG relevant information according to described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned;
The first processing unit, while for determining, judgment result is that "Yes", directly carry out hand-off process in this locality;
The second processing unit, while for determining, judgment result is that "No", the CSG relevant information of described Target cell is mail to body MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
A kind of system of controlling the switching of eNB internal zone comprises:
ENB, for in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the CSG relevant information of described Target cell, and judge according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
MME, adjudicated for the CSG relevant information of the Target cell according to the eNB transmission, and returned to court verdict.
In the embodiment of the present invention, when eNB need switch to inner Target cell by UE according to measurement report is definite, while according to the CSG relevant information of this Target cell, determining that the CSG ID of CSG ID that Target cell is open community or Target cell and cell-of-origin is identical, directly carry out hand-off process in this locality, otherwise, when the CSG ID in the CSG ID that determines Target cell and cell-of-origin is not identical, the CSG relevant information of Target cell is mail to MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.Like this, just, realized switching between the community of eNB inside.
The accompanying drawing explanation
Fig. 1 is source eNB and the mutual schematic diagram of MME when under prior art, UE switches between eNB;
Fig. 2 is target eNB and the mutual schematic diagram of MME when under prior art, UE switches between eNB;
Fig. 3 is TD-SCDMA Solution Architecture figure in the embodiment of the present invention;
Fig. 4 is eNB functional structure chart in the embodiment of the present invention;
Fig. 5 is UE switching flow figure between the eNB internal zone in the embodiment of the present invention;
Fig. 6 is eNB and the mutual handover success schematic diagram of MME in the embodiment of the present invention;
Fig. 7 is eNB and the mutual handoff failure schematic diagram of MME in the embodiment of the present invention.
Embodiment
In mobile communication system, in order to realize the switching of UE between the eNB internal zone of supporting CSG, in the embodiment of the present invention, comprising: when eNB need switch to inner Target cell by UE according to measurement report is definite, obtain the CSG relevant information of described Target cell; It is pre-conditioned that eNB judges according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to mobile management entity (MME) request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
In the embodiment of the present invention, above-mentioned CSG relevant information comprises Target cell access module and CSGID separately, wherein, access module is divided into three kinds of open mode (open mode), closed mode (close mode) and mixed modes (hybid mode).Be provided with CSG ID at closed mode and mixed mode Xia， community, therefore, can comprise access module and the CSG ID (the ID symbol with appointment means) of Target cell in the CSG relevant information of the Target cell that UE reports to eNB; Correspondingly, when access module is open mode, community does not arrange CSG ID, therefore, can only comprise the access module of Target cell in the CSG relevant information of the Target cell that UE reports to eNB, not carry CSG ID, also can be when carrying the access module of Target cell, carry null character (NUL) at specific field, for meaning, CSG ID is not set, repeating no more.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
Consult shown in Fig. 3, in the embodiment of the present invention, comprising for the system of controlling eNB internal zone switching (as, TD-SCDMA system): eNB, MME and UE, wherein,
ENB, for in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the CSG relevant information of described Target cell, and judge according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
MME, adjudicated for the CSG relevant information of the Target cell according to the eNB transmission, and returned to court verdict.
Consult shown in Fig. 4, in the embodiment of the present invention, for the device of controlling eNB internal zone switching (as, eNB) comprise acquiring unit 10, judging unit 11, the first processing unit 12 and the second processing unit 13, wherein,
Acquiring unit 10, in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the CSG relevant information of described Target cell;
Judging unit 11, judge for the CSG relevant information according to described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned;
The first processing unit 12, while for determining, judgment result is that "Yes", directly carry out hand-off process in this locality;
The second processing unit 13, while for determining, judgment result is that "No", the CSG relevant information of described Target cell is mail to MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process.
Based on above-mentioned principle, below a plurality of concrete execution modes are elaborated.
Consult shown in Fig. 5, in the embodiment of the present invention, the switching flow of UE between the eNB internal zone is as follows:
When step 500:eNB need switch to inner Target cell by UE according to measurement report is definite, obtain the CSG relevant information of described Target cell.
It is pre-conditioned that step 510:eNB judges according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet, if perform step 520; Otherwise, perform step 530.
In the present embodiment, the CSG access module of Target cell meets pre-conditioned referring to: Target cell is the open mode community.And the CSG ID of Target cell meets pre-conditioned referring to: the CSG ID of Target cell is identical with the CSG ID of cell-of-origin.
Step 520:eNB directly carries out hand-off process in this locality.For example, variation of the physical resource that adjustment UE takies etc.
In the present embodiment, perform step at 520 o'clock and comprise following three kinds of situations:
In the first situation, if eNB determines that according to the CSG relevant information of Target cell Target cell is the open mode community, allows UE to switch to Target cell.Now, cell-of-origin can be open mode community, closed mode community or mixed mode community.
In the second situation, if eNB determines that according to the CSG relevant information of Target cell the CSG ID of Target cell is identical with the CSG ID of cell-of-origin, further judge the access module of cell-of-origin, and while in definite cell-of-origin, being the mixed mode community, the encapsulation user whether the CSG ID that judges Target cell belongs to UE organizes and allows list (be UE in cell-of-origin whether with the access of member identity), if allow UE to switch to Target cell; Otherwise refusal UE switches to Target cell.Now, Target cell can be closed mode community or mixed mode community.
In the third situation, if eNB determines that according to the CSG relevant information of Target cell the CSG ID of Target cell is identical with the CSG ID of cell-of-origin, further judge the access module of cell-of-origin, and while in definite cell-of-origin, being the closed mode community, allow UE to switch to Target cell.Because cell-of-origin is the closed mode community, UE is that the mode with member accesses certainly in cell-of-origin, and because the CSG ID of cell-of-origin and Target cell is identical, therefore, UE can access Target cell certainly, do not need MME to carry out access control, the physical resource that only needs eNB to take at internal adjustment UE gets final product.Now, Target cell can be closed mode community or mixed mode community.
Step 530:eNB mails to mobile management entity (MME) request judgement by the CSG relevant information of described Target cell, and the court verdict returned according to MME is carried out corresponding hand-off process.
In the embodiment of the present invention, in execution step, comprise following two kinds of situations at 530 o'clock:
In the first situation, if eNB determines that according to the CSG relevant information of Target cell the CSG ID of Target cell is not identical with the CSG ID of cell-of-origin, further judge the access module of Target cell, and when definite Target cell is the closed mode community, send access target CS G community request message (S1 AP signaling) to MME, carry the CSG relevant information (comprising access module and CSG ID) of Target cell in this access target CS G community request message, UE is application layer ID (eNB UE AP ID) and UE application layer ID (MME UE AP ID) etc. in MME in eNB, wherein, eNB UE AP ID and MME UE AP ID are respectively used to identify UE in eNB and MME, after MME receives the CSG relevant information of Target cell, judge that the CSG ID of Target cell is whether in the allowed of UE CSG list, if, consult shown in Fig. 6, by response message (S1 AP signaling) notice eNB judgement, allow UE to switch to Target cell, carry the eNB UE AP ID of UE and MME UE AP ID etc. in this response message, otherwise, consult shown in Fig. 7, MME accesses message (S1 AP signaling) notice eNB judgement refusal UE by refusal and switches to Target cell, eNB carries out corresponding hand-off process according to the court verdict of MME.Now, cell-of-origin can be open mode community, closed mode community or mixed mode community, wherein, because the open mode community does not arrange CSG ID, therefore, when cell-of-origin is the open mode community, also can be regarded as cell-of-origin different with Target cell CSG ID.
In the second situation, if eNB determines that according to the CSG relevant information of Target cell the CSG ID of Target cell is not identical with the CSG ID of cell-of-origin, further judge the access module of Target cell, and when definite Target cell is the mixed mode community, send access target CS G community request message (S1 AP signaling) to MME, carry the CSG relevant information (comprising access module and CSG ID) of Target cell in this access target CS G community request message, eNB UE AP ID and MME UE AP ID etc., after MME receives the CSG relevant information of Target cell, judge that the CSG ID of Target cell is whether in the allowed of UE CSG list, if, by response message (S1 AP signaling) notice eNB judgement, allow UE to switch to Target cell, and carry out high priority Qos and serve, because UE accesses with the member identity, otherwise, by response message, (S1 AP signaling eNB judgement allows UE to switch to Target cell, and carry out low priority Qos and serve, because UE is with non-member identity access, also carry the eNB UE AP ID of UE and MME UE AP ID etc. in this response message.Now, cell-of-origin can be open mode community, closed mode community or mixed mode community, wherein, because the open mode community does not arrange CSG ID, therefore, when cell-of-origin is the open mode community, also can be regarded as cell-of-origin different with Target cell CSG ID.
In sum, in the embodiment of the present invention, while between the eNB internal zone to supporting CSG, carrying out switching controls, whether at first eNB judges Target cell before and after switching is that the CSG ID of open mode community or Target cell is identical with the CSG ID of cell-of-origin, if, in this locality, directly carry out hand-off process, otherwise, the CSG relevant information of Target cell is mail to MME is adjudicated, and the court verdict returned according to MME is carried out corresponding hand-off process, this is due to compared to cell-of-origin, and therefore the CSG state difference of Target cell needs the MME assist process.Like this, just successfully realize the switching of UE between the eNB internal zone, made up the technological gap under the prior art.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (3)
1. a method of controlling the switching of evolution base station eNB internal zone, is characterized in that, comprising:
When eNB need switch to inner Target cell by UE according to measurement report is definite, obtain the encapsulation subscriber group (CSG) relevant information of described Target cell;
It is pre-conditioned that eNB judges according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to mobile management entity MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process; Wherein, the CSG access module of described Target cell meets pre-conditionedly is: Target cell is the open mode community; The CSG ID of described Target cell meets pre-conditionedly is: the CSG ID of Target cell is identical with the CSG ID of cell-of-origin;
When eNB determines that according to the CSG relevant information of described Target cell the CSG access module of Target cell meets when pre-conditioned, the described hand-off process of directly carrying out in this locality comprises: eNB allows UE to switch to Target cell;
When eNB determines that according to the CSG relevant information of described Target cell the CSG ID of Target cell meets when pre-conditioned, the described hand-off process of directly carrying out in this locality comprises:
ENB further determines when cell-of-origin is the mixed mode community, and the encapsulation user whether the CSG ID that judges Target cell belongs to UE organizes the permission list, if allow UE to switch to Target cell; Otherwise refusal UE switches to Target cell; Or,
ENB further determines when cell-of-origin is the closed mode community, allows UE to switch to Target cell;
When eNB determines that according to the CSG relevant information of described Target cell the CSG ID of Target cell does not meet when pre-conditioned, the described relevant information of the CSG by described Target cell mails to mobile management entity MME request judgement, and the court verdict returned according to MME carries out corresponding hand-off process, comprising:
ENB further determines when Target cell is the closed mode community, to MME, sends access Target cell request message, the CSG relevant information of in this access Target cell request message, carrying Target cell; MME judges that according to the CSG relevant information of described Target cell the encapsulation user whether the CSG ID of Target cell belongs to UE organizes the permission list, if, notify the eNB judgement to allow UE to switch to Target cell, otherwise notice eNB judgement refusal UE switch to Target cell; ENB carries out corresponding hand-off process according to the court verdict of MME; Or,
ENB further determines when Target cell is the mixed mode community, to MME, sends access Target cell request message, the CSG relevant information of in this access Target cell request message, carrying Target cell; MME judges that according to the CSG relevant information of described Target cell the encapsulation user whether the CSG ID of Target cell belongs to UE organizes the permission list, if, notify the eNB judgement to allow UE to switch to Target cell, and carry out high priority Qos and serve, otherwise, notice eNB judgement allows UE to switch to Target cell, and carries out low priority Qos service; ENB carries out corresponding hand-off process according to the court verdict of MME.
2. a device of controlling the switching of evolution base station eNB internal zone, is characterized in that, comprising:
Acquiring unit, in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the encapsulation subscriber group (CSG) relevant information of described Target cell;
Judging unit, judge for the CSG relevant information according to described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned;
The first processing unit, while for determining, judgment result is that "Yes", directly carry out hand-off process in this locality;
The second processing unit, while for determining, judgment result is that "No", the CSG relevant information of described Target cell is mail to mobile management entity MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process;
Wherein, the CSG access module of described Target cell meets pre-conditionedly is: Target cell is the open mode community; The CSG ID of described Target cell meets pre-conditionedly is: the CSG ID of Target cell is identical with the CSG ID of cell-of-origin;
Determine the CSG access module of described Target cell when described judging unit and meet when pre-conditioned, described the first processing unit specifically for, allow UE to switch to Target cell;
Determining the CSG ID of described Target cell when described judging unit meets when pre-conditioned, described the first processing unit specifically for, when definite cell-of-origin is the mixed mode community, the encapsulation user whether the CSG ID that judges Target cell belongs to UE organizes the permission list, if allow UE to switch to Target cell; Otherwise refusal UE switches to Target cell; Or,
When definite cell-of-origin is the closed mode community, allow UE to switch to Target cell;
Determining the CSG ID of described Target cell when described judging unit does not meet when pre-conditioned, described first process specifically for, when definite Target cell is the closed mode community, send access Target cell request message, the CSG relevant information of in this access Target cell request message, carrying Target cell to MME; And the court verdict returned according to MME determines whether to allow UE to switch to Target cell; Or,
When definite Target cell is the mixed mode community, send access Target cell request message to MME, the CSG relevant information of in this access Target cell request message, carrying Target cell, and the court verdict returned according to MME determine to allow UE to switch to Target cell, and carry out the Qos service of respective priority.
3. a system of controlling the switching of evolution base station eNB internal zone, is characterized in that, comprising:
ENB, for in the time according to measurement report is definite, UE need being switched to inner Target cell, obtain the encapsulation subscriber group (CSG) relevant information of described Target cell, and judge according to the CSG relevant information of described Target cell whether the CSG access module of Target cell or CSG ID meet pre-conditioned, if in this locality, directly carry out hand-off process; Otherwise, the CSG relevant information of described Target cell is mail to mobile management entity MME request judgement, and the court verdict returned according to MME is carried out corresponding hand-off process;
MME, adjudicated for the CSG relevant information of the Target cell according to the eNB transmission, and returned to court verdict;
Wherein, the CSG access module of described Target cell meets pre-conditionedly is: Target cell is the open mode community; The CSG ID of described Target cell meets pre-conditionedly is: the CSG ID of Target cell is identical with the CSG ID of cell-of-origin;
When described eNB determines that according to the CSG relevant information of described Target cell the access module of Target cell meets when pre-conditioned, allows UE to switch to Target cell;
When described eNB determines that according to the CSG relevant information of described Target cell the CSG ID of Target cell meets when pre-conditioned, when further determining that cell-of-origin is the mixed mode community, the encapsulation user whether the CSG ID that judges Target cell belongs to UE organizes the permission list, if allow UE to switch to Target cell; Otherwise refusal UE switches to Target cell; Or,
When further determining that cell-of-origin is the closed mode community, allow UE to switch to Target cell;
When described eNB determines that according to the CSG relevant information of described Target cell the CSG ID of Target cell does not meet when pre-conditioned, when further determining that Target cell is the closed mode community, send access Target cell request message, the CSG relevant information of in this access Target cell request message, carrying Target cell to MME; MME judges that according to the CSG relevant information of described Target cell the encapsulation user whether the CSG ID of Target cell belongs to UE organizes the permission list, if, notify the eNB judgement to allow UE to switch to Target cell, otherwise notice eNB judgement refusal UE switch to Target cell; ENB carries out corresponding hand-off process according to the court verdict of MME; Or,
When further determining that Target cell is the mixed mode community, to MME, send access Target cell request message, the CSG relevant information of in this access Target cell request message, carrying Target cell; MME judges that according to the CSG relevant information of described Target cell the encapsulation user whether the CSG ID of Target cell belongs to UE organizes the permission list, if, notify the eNB judgement to allow UE to switch to Target cell, and carry out high priority Qos and serve, otherwise, notice eNB judgement allows UE to switch to Target cell, and carries out low priority Qos service; ENB carries out corresponding hand-off process according to the court verdict of MME.
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| CN104469873A (en) * | 2013-09-25 | 2015-03-25 | 中兴通讯股份有限公司 | Cell switching method and device |
| CN107371198B (en) * | 2016-05-12 | 2020-07-10 | 中兴通讯股份有限公司 | Method and system for cell switching |
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