CN102111829B - Cross-area HO method for called service in group calling - Google Patents
Cross-area HO method for called service in group calling Download PDFInfo
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- CN102111829B CN102111829B CN 200910243586 CN200910243586A CN102111829B CN 102111829 B CN102111829 B CN 102111829B CN 200910243586 CN200910243586 CN 200910243586 CN 200910243586 A CN200910243586 A CN 200910243586A CN 102111829 B CN102111829 B CN 102111829B
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Abstract
The invention discloses a cross-area HO (Hand Over) method for a called service in a group calling, which comprises the following steps: UE (User Equipment) sends Group Num IE (Information Element) for identifying a group calling service switched-in by the UE to a source eNB; after receiving the IE, the source eNB starts a cross-area HO and sends the IE to a target eNB; the target eNB judges whether or not a group calling service identified G-RNTI (Radio Network Temporary Identifier) corresponding to the IE exist in the target eNB according to a mapping relation set in advance by the target eNB; if the G-RNTI exists in the target eNB, the target eNB feeds the G-RNTI back to the source eNB and then completes the cross-area HO to the called service in the group calling; and if the G-RNTI does not exist in the target eNB, the target eNB sets up a resource carrier needed by the group calling service identified by the IE, generates the G-RNTI corresponding to the IE according to the mapping relationship, and then feeds the G-RNTI back to the source eNB and then completes the cross-area HO to the called service in group calling. By adopting the method provided by the invention, the HO to the called service in group calling can be smoothly carried out during across-area of the called UE in the group calling.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to a kind of method that the business handover is exhaled in group calling.
Background technology
Trunking communication (Trunk Communication) claims again cluster wireless communication (Trunked Radio), refer to the professional user of the various classification sparse capacity of some is put together, utilize the wireless channel of same bus, carry out the multipurpose take command scheduling as main body, dynamical private radio communication.For the not high private radio communication of dispersion operation, the level of resources utilization such with respect to early stage simple talkback system, up-to-date trunking communication has the advantages that dynamic channel allocation, channel shared by multiple users resource etc. take full advantage of limited radio channel resource, makes the member who participates in trunking communication can share abundant specific function and business.Therefore, in 3 G mobile communication network and evolvement network thereof, trunking communication has obtained paying close attention to widely and studying as using focus.
For time-division long-term evolving network (TD Long Term Evolution, be called for short TD-LTE), adopt the resource distribution mode of interference coordination due to each residential quarter in system, make for the some group-calling services in system, the resource of distributing between neighbor cell is also incomplete same, simultaneously, each cell allocation arrive with G-RNTI corresponding to this group-calling service also might not be identical; This just makes radio resource control (Radio Resource Control, RRC) the group-calling service UE under connection status must carry out the group-calling service switching (for ease of describing when more distinguishing, hereinafter use cell-of-origin and Target cell that the residential quarter before and after more distinguishing is distinguished), otherwise group-calling service UE more may continue to use this group-calling service behind the district, thereby can't guarantee continuity and the real-time of group-calling service.
In the middle of trunked mobile communication system, group-calling service subscriber equipment (User Equipment, UE) comprises that the master exhales UE and exhaled UE, and wherein, the master exhales UE usually to be also referred to as unicast service UE.And for the individual calling business UE in the TD-LTE system, the handover flow process that provides in the current standard of third generation partner program (3rd Generation Partnership Project, 3GPP) as shown in Figure 1, comprising:
(Source eNB) sends measurement report message to step 101:UE to the cell-of-origin;
Step 102: handover is initiated in the cell-of-origin;
Step 103: the cell-of-origin sends handover request (HandOver Request) message to Target cell (Target eNB), information unit (the Information Element that described handover request message is carried, IE) comprise E-RABs To Be Setup List, this IE is used for the set that expression needs the type of service of Target cell foundation;
Step 104: Target cell carries out the type of service (being group-calling service this moment) of handover according to the E-RAB ID identification needs that comprise in the E-RABs To Be Setup List that comprises in described handover request message, set up corresponding group-calling service;
Step 105: Target cell returns to handover request and replys (HandOver Request Acknowledge) message to the cell-of-origin, the IE that this message is carried comprise E-RABs Admitted List and E-RABs Not Admitted List(optional); Wherein, E-RABs Admitted List is for the set that represents the type of service that Target cell has been set up, E-RABs Not Admitted List is used for being illustrated in the type of service of step 103 cell-of-origin by E-RABs To Be Setup List notification target residential quarter, the set of the unfounded type of service of Target cell;
Step 106: the cell-of-origin is returned to the RRC connection to UE and is reshuffled (RRC Connection Reconfiguration) message;
Step 107: the cell-of-origin sends SN Status Transfer message to Target cell, this message is used for during handover PDCP (the Packet Data Convergence Protocol with the cell-of-origin, PDCP) sequence number and Hyper Frame Number (Hyper Frame Number, HFN) are transferred to Target cell;
After step 108:UE and Target cell were completed down-going synchronous, group service channel (Trunking Traffic Channel, the TTCH) data of receiving target residential quarter were to complete uplink synchronous;
Step 109:UE reshuffles to Target cell transmission RRC connection and completes (RRC Connection Reconfiguration Complete) message.
Step 110: Target cell is to Mobility Management Entity/SGW (MME/SGW) transmit path conversion request (Path Switch Request) message;
Step 111:MME/SGW receives described path switching request information, completes the conversion of downlink path according to the downlink data tunnel destination node that carries in this message, and sends to the cell-of-origin packet that carries the EndMarker sign;
Step 112:MME/SGW is to Target cell transmit path conversion request-reply (Path Switch Request Acknowledge) message;
Step 113: Target cell sends the UE context and discharges (UE Context Release) message to the cell-of-origin, the contextual release of UE is completed at data forwarding in the cell-of-origin.
So far, the handover flow process finishes.
Yet, above-mentioned flow process is the handover flow process that is used for individual calling UE that proposes in the existing standard of 3GPP, can't be used for realizing that group calling exhaled the handover flow process of business UE, reason is: the E-RABs To Be Setup List parameter of carrying in the handover request message of described step 103 can only be used for the main UE of exhaling of group calling, and is not suitable for identified group and exhales and exhaled UE to use; On the other hand, according to the existing protocol standard, for a certain group-calling service, the G-RNTI of a correspondence can be distributed for this group-calling service in each residential quarter, and the G-RNTI of each cell allocation possibility is identical also may be different, this just makes in group calling and is exhaled during UE carries out the process of handover, and Target cell can't be determined group calling by the type of the group-calling service of exhaling UE to use in the cell-of-origin by obtaining the G-RNTI that uses the cell-of-origin, thereby just can't realize smoothly that also group calling exhaled the handover of business.
Summary of the invention
The invention provides a kind of group calling and exhaled the method for business handover, can realize smoothly group calling is exhaled the handover of business.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The method of business handover is exhaled in a kind of group calling, and the method comprises:
UE sends the Group Num information unit of the group-calling service that is used for this UE access of sign to the cell-of-origin;
Handover is initiated after receiving described information unit in the cell-of-origin, and described information unit is sent to Target cell;
Target cell judges whether there be the G-RNTI corresponding with described information unit in this Target cell according to the Group Num sign of setting up in advance with group-calling service sign G-RNTI mapping relations; If exist, Target cell returns to described G-RNTI the cell-of-origin and continues to complete the handover that business is exhaled in group calling; If there is no, Target cell is by setting up the needed resource bearing of group-calling service corresponding to described information unit sign with obtaining alternately of MME/SGW, generate the G-RNTI corresponding with this information unit according to described mapping relations, carry out that afterwards described G-RNTI is returned to the cell-of-origin and continues to complete the handover that business is exhaled in group calling.
Described UE sends method from the Group Num information unit of the group-calling service that is used for this UE access of sign to the cell-of-origin comprises:
UE is included in described information unit and sends to the cell-of-origin in measurement report message.
Send to the method for Target cell to comprise described information unit:
The cell-of-origin sends to Target cell in the middle of described information unit is included in handover request message.
Target cell comprises the method that described G-RNTI returns to the cell-of-origin:
Target cell returns to the cell-of-origin in the middle of described G-RNTI is included in handoff request acknowledgment message.
The method that Target cell is set up the needed resource bearing of group-calling service of described information unit sign comprises:
Target cell sends group-calling service to Mobility Management Entity MME/ SGW SGW and sets up request message, and carries described information unit in this message;
MME/SGW receives described group-calling service and sets up request message, be that the various resources of the corresponding group-calling service needs of this information unit are set up in the Target cell distribution according to described information unit, and the various resources of described distribution set up acknowledge message by group-calling service notify to described Target cell;
Target cell successfully receives described group-calling service set up acknowledge message after, return to group-calling service to MME/SGW and set up message authentication message, complete distribution and the foundation of resource bearing.
When the method is used for the handover of the composite service that clean culture and group calling exhaled,
Send to the method for Target cell to comprise described information unit:
In the middle of being included in handover request message together with E-RABs To Be Setup List, described information unit sends to Target cell;
Target cell comprises the method that described G-RNTI returns to the cell-of-origin:
Target cell returns to the cell-of-origin in the middle of described G-RNTI is included in handoff request acknowledgment message, and also further comprise in described handoff request acknowledgment message: E-RABs Admitted List information unit, perhaps E-RABs Admitted List information unit and E-RABs Not Admitted List information unit.
As seen from the above technical solutions, the method of business handover is exhaled in the group calling that the embodiment of the present invention provides, obtain carrying out the group calling of handover by the type of the group-calling service of exhaling business UE to use in the cell-of-origin by obtaining Group Num sign, also further set up simultaneously the described group calling business of being exhaled and switched to needed resource bearing after Target cell, thereby made group calling be exhaled UE can carry out smoothly the switching that business is exhaled in group calling when more distinguishing.
Description of drawings
Fig. 1 is the schematic flow sheet of individual calling business UE handover in prior art.
Fig. 2 is the schematic flow sheet that the method for business handover is exhaled in embodiment of the present invention group calling.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
A kind of method that the embodiment of the present invention provides group calling to be exhaled the business handover, its flow process as shown in Figure 2, comprising:
Step 201: it is UE that the UE(hereafter is exhaled in group calling) send measurement report message to the cell-of-origin, and carry Group Num sign in described measurement report message, described Group Num is used for the group-calling service type of this UE access of sign;
Step 202: handover is initiated in the cell-of-origin;
Step 203: the handover request message that Group Num sign will be carried in the cell-of-origin sends to Target cell;
Step 204: Target cell is according to the Group Num sign and G-RNTI mapping relations set up in advance, judge and whether have the G-RNTI corresponding with the Group Num sign that comprises in described handover request message in this Target cell, if exist, execution in step 207, otherwise execution in step 205;
Wherein, describedly judge whether to exist the method for the G-RNTI corresponding with described Group Num sign to comprise:
According to the Group Num sign and G-RNTI mapping relations set up in advance in this Target cell, judge whether exist in Target cell with described handover request message in the Group Num that comprises identify corresponding G-RNTI.
Step 205: Target cell is by setting up with obtaining alternately of MME/SGW the resource bearing that group-calling service corresponding to described Group Num sign needs;
At this moment, described step 205 can be used the method for various Gains resources carrying, and the embodiment of the present invention is to this and be not specifically limited, and can the difference of described step 205 implementation not implement to produce any impact to the present invention.Such as, described step 205 possible implementation can for:
Step 205a: Target cell sends group-calling service to MME/SGW and sets up request message, carries described Group Num sign in this message;
Step 205b:MME/SGW receives the group-calling service that carries Group Num sign and sets up request message, is designated Target cell according to described Group Num and distributes the needed various resources of group-calling service of setting up this sign correspondence;
Step 205c:MME/SGW sets up acknowledge message notification target residential quarter with the various resources of described distribution by group-calling service;
Step 205d: Target cell successfully receives described group-calling service set up acknowledge message after, return to group-calling service to MME/SGW and set up message authentication message, complete the distribution of resource bearing and set up process.
Step 206: Target cell is according to described mapping relations, generate with described handover request message in the Group Num that comprises identify corresponding G-RNTI;
Step 207: the handoff request acknowledgment message that Target cell will carry described G-RNTI returns to the cell-of-origin;
As seen, the Target cell of this moment has obtained carrying out the group calling of handover by the type of the group-calling service of exhaling business UE to use in the cell-of-origin, set up described group calling and switched to after Target cell needed resource bearing and generated G-RNTI corresponding to described group-calling service by the business of exhaling, therefore can guarantee the smooth switching of group-calling service when described UE more distinguishes.
It is identical that subsequent step 208 ~ step 215 is carried out concrete process and the step 106 of the prior art ~ step 113 of switching, therefore repeat no more.
So far, group calling is exhaled the handover flow process of UE to finish.
Preferably, above-mentioned flow process can also be used for the main handover flow process of exhaling UE of group calling, and correspondingly, need to the handover request message in step 203 further comprise IE:E-RABs To Be Setup List this moment; And the handoff request acknowledgment message in step 207 further comprises IE:E-RABs Admitted List, perhaps further comprises IE:E-RABs Admitted List and E-RABs Not Admitted List.
By as seen above-mentioned, the method of business handover is exhaled in the group calling that the embodiment of the present invention provides, obtain carrying out the group calling of handover by the type of the group-calling service of exhaling business UE to use in the cell-of-origin by obtaining Group Num sign, also further set up simultaneously the described group calling business of being exhaled and switched to needed resource bearing after Target cell, thereby made group calling be exhaled UE can carry out smoothly the switching that business is exhaled in group calling when more distinguishing.
At last; it is to be noted; the title of IE in the title of each message in the handoff procedure of the UE of group-calling service described in the embodiment of the present invention and message is all that giving an example of adopting not is for limiting embodiments of the present invention and protection range in order to explain clear.Within the spirit and principles in the present invention all, any modification that those skilled in the art do, be equal to replacement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the method for business handover is exhaled in a group calling, it is characterized in that, the method comprises:
User equipment (UE) sends the Group Num information unit of the group-calling service that is used for this UE access of sign to the cell-of-origin;
Handover is initiated after receiving described information unit in the cell-of-origin, and described information unit is sent to Target cell;
Target cell judges whether there be the G-RNTI corresponding with described information unit in this Target cell according to the Group Num sign of setting up in advance with group-calling service sign G-RNTI mapping relations; If exist, Target cell returns to described G-RNTI the cell-of-origin and continues to complete the handover that business is exhaled in group calling; If there is no, Target cell is by setting up the needed resource bearing of group-calling service corresponding to described information unit sign with obtaining alternately of MME/SGW, generate the G-RNTI corresponding with this information unit according to described mapping relations, carry out that afterwards described G-RNTI is returned to the cell-of-origin and continues to complete the handover that business is exhaled in group calling.
2. method according to claim 1, is characterized in that, described UE sends method from the Group Num information unit of the group-calling service that is used for this UE access of sign to the cell-of-origin comprises:
UE is included in described information unit and sends to the cell-of-origin in measurement report message.
3. method according to claim 2, is characterized in that, sends to the method for Target cell to comprise described information unit:
The cell-of-origin sends to Target cell in the middle of described information unit is included in handover request message.
4. method according to claim 3, is characterized in that, Target cell comprises the method that described G-RNTI returns to the cell-of-origin:
Target cell returns to the cell-of-origin in the middle of described G-RNTI is included in handoff request acknowledgment message.
5. method according to claim 4, is characterized in that, the method that Target cell is set up the needed resource bearing of group-calling service of described information unit sign comprises:
Target cell sends group-calling service to Mobility Management Entity MME/ SGW SGW and sets up request message, and carries described information unit in this message;
MME/SGW receives described group-calling service and sets up request message, be that the various resources of the corresponding group-calling service needs of this information unit are set up in the Target cell distribution according to described information unit, and the various resources of described distribution set up acknowledge message by group-calling service notify to described Target cell;
Target cell successfully receives described group-calling service set up acknowledge message after, return to group-calling service to MME/SGW and set up message authentication message, complete distribution and the foundation of resource bearing.
6. the described method of any one according to claim 1 to 5, is characterized in that, when the method is used for the handover of the composite service that clean culture and group calling exhaled,
Send to the method for Target cell to comprise described information unit:
In the middle of being included in handover request message together with E-RABs To Be Setup List, described information unit sends to Target cell;
Target cell comprises the method that described G-RNTI returns to the cell-of-origin:
Target cell returns to the cell-of-origin in the middle of described G-RNTI is included in handoff request acknowledgment message, and also further comprise in described handoff request acknowledgment message: E-RABs Admitted List information unit, perhaps E-RABs Admitted List information unit and E-RABs Not Admitted List information unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910243586 CN102111829B (en) | 2009-12-25 | 2009-12-25 | Cross-area HO method for called service in group calling |
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| CN 200910243586 CN102111829B (en) | 2009-12-25 | 2009-12-25 | Cross-area HO method for called service in group calling |
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| CN102111829A CN102111829A (en) | 2011-06-29 |
| CN102111829B true CN102111829B (en) | 2013-06-05 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104703171A (en) | 2013-12-07 | 2015-06-10 | 北京信威通信技术股份有限公司 | Cluster service attribute processing method, device and system |
| CN105635982A (en) * | 2014-11-02 | 2016-06-01 | 北京信威通信技术股份有限公司 | LTE cluster group calling extension method |
| CN106412842B (en) * | 2015-07-29 | 2019-07-23 | 普天信息技术有限公司 | Group call region management method under SC-PTM system |
| CN106998537B (en) * | 2016-01-25 | 2019-09-10 | 展讯通信（上海）有限公司 | The information transferring method and device of group-calling service |
| CN107466067B (en) * | 2016-09-21 | 2021-11-02 | 海能达通信股份有限公司 | Group call service switching method, system, base station and terminal |
| CN106341796B (en) * | 2016-10-24 | 2019-12-27 | 海能达通信股份有限公司 | Group calling service realization method, terminal and base station system |
| CN108012287B (en) * | 2017-12-13 | 2021-02-19 | 武汉虹信科技发展有限责任公司 | Method and system for realizing cluster service continuity |
| WO2019136635A1 (en) * | 2018-01-10 | 2019-07-18 | 海能达通信股份有限公司 | Cluster communication system, cluster terminal, cluster core network and method for switching cells |
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| CN1708172A (en) * | 2004-06-10 | 2005-12-14 | 华为技术有限公司 | Method for establishing privacy call |
| CN1805557A (en) * | 2005-01-13 | 2006-07-19 | 华为技术有限公司 | Method of enabling multiple users to receive data services in the same channel |
| WO2009022860A1 (en) * | 2007-08-13 | 2009-02-19 | Lg Electronics Inc. | Method for performing handover in wireless communication system |
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| CN1708172A (en) * | 2004-06-10 | 2005-12-14 | 华为技术有限公司 | Method for establishing privacy call |
| CN1805557A (en) * | 2005-01-13 | 2006-07-19 | 华为技术有限公司 | Method of enabling multiple users to receive data services in the same channel |
| WO2009022860A1 (en) * | 2007-08-13 | 2009-02-19 | Lg Electronics Inc. | Method for performing handover in wireless communication system |
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