CN104219717A - A terminal switching method, base station and terminal switching system - Google Patents
A terminal switching method, base station and terminal switching system Download PDFInfo
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- CN104219717A CN104219717A CN201310214673.2A CN201310214673A CN104219717A CN 104219717 A CN104219717 A CN 104219717A CN 201310214673 A CN201310214673 A CN 201310214673A CN 104219717 A CN104219717 A CN 104219717A
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Abstract
The present invention provides a terminal switching method, a base station and a terminal switching system. The method includes: when receiving a witching request sent by an original base station which belongs to a terminal simultaneously attached to a cluster core network and an LTE core network, a target base station returns a switching request confirmation to the original base station, and the original base station sends a connection reconfiguration message to the terminal according to the switching request confirmation; after receiving a connection reconfiguration completion message sent by the terminal, the target base station acquires type of service of the terminal; when the terminal has both ordinary services and cluster services, the target base station sends the path switching request to the cluster core network and the LTE core network, respectively; after receiving a path switching confirmation returned by the cluster core network and the LTE core network, the target base station sends an UE context release message to the original base station; and the target base station receives an UE context release completion message returned by the original base station after releasing the UE context. The present invention can perform the switching process when the terminal has both ordinary services and cluster services.
Description
Technical field
The present invention relates to communication technical field, particularly the system of a kind of method of terminal switch, base station and terminal switch.
Background technology
So-called LTE(Long Term Evolution, Long Term Evolution) public network cluster, namely carry private network group service by LTE public network.Because group service is higher to security requirement, usually need to carry out Network Isolation, current isolation scheme can comprise the scheme that core net is isolated, Access Network is isolated, core net Access Network is all isolated.Usually the network architecture that core net is isolated, Access Network is shared is adopted in prior art, please refer to Fig. 1, the benefit of this kind of network architecture is the security level required that both can reach physical entity isolation level, the Access Network of LTE public network can be leveraged fully on again, more effectively utilize Radio Resource, and due to based on general LTE baseband chip, thus more easily promote the maturation of public network cluster by its industrial chain advantage.
When the existing general service of terminal in the network architecture that core net isolation, Access Network are shared has again group service, how to process during switching, there is no corresponding solution at present.
Summary of the invention
In view of this, the invention provides the system of a kind of method of terminal switch, base station and terminal switch, to perform hand-off process when the existing general service of terminal has again a group service.
For solving the problem, the invention provides a kind of method of terminal switch, comprising:
Target BS, when the handover request that the former base station received belonging to terminal sends, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Described target BS, after the connection reprovision receiving the transmission of described terminal completes message, obtains the present type of service of described terminal;
When the current existing general service of described terminal has again group service, described target BS is respectively to described cluster core net and described LTE core network transmit path handover request;
Described target BS receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message;
Described target BS receives the terminal contexts Release complete that described former base station returns after performing terminal contexts release.
Preferably, also comprise after the step of the present type of service of the described terminal of described acquisition:
When described terminal is current only have general service or a group service time, described target BS is to described LTE core network or to described cluster core net transmit path handover request;
Described target BS receiving after path that described LTE core network or described cluster core net return switches and confirm, to described former base station transmitting terminal context release message;
Described target BS receives the terminal contexts Release complete that described former base station returns after performing terminal contexts release.
Preferably, described target BS returns the step of Handover Request Acknowledge and described target BS and receives between step that connection reprovision that described terminal sends completes message and also comprise to described former base station:
Described target BS carries out the synchronous of terminal data with described terminal.
The present invention also provides a kind of method of terminal switch to comprise:
Former base station is when judging that terminal needs to switch, and obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
When the existing general service of described terminal has again group service, described former base station sends handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one;
Described former base station receives the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one;
The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described cluster core net and described LTE core network;
After described former base station receives the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
Preferably, also comprise after the step of the present type of service of the described terminal of described acquisition:
When described terminal only has general service or group service, described former base station sends handover request to described LTE core network or described cluster core net, wherein, the handover request received is transmitted to target BS by described LTE core network or described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns;
Described former base station receives the switching command comprising described connection reallocation message of described LTE core network or the transmission of described cluster core net;
The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described LTE core network or described cluster core net;
After described former base station receives the release terminal contexts order that described LTE core network or described cluster core net send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network or described cluster core net.
The present invention also provides a kind of base station, as the target BS performing terminal switch, comprising:
Handover Request Acknowledge module, for when receiving the handover request of the former base station transmission belonging to terminal, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Type of service acquisition module, after completing message at the connection reprovision receiving the transmission of described terminal, obtains the present type of service of described terminal;
First via footpath switches request module, for when the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request;
First terminal context release module, for receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message, and receive described former base station terminal contexts Release complete of returning after performing terminal contexts release.
Preferably, described base station also comprises:
Second path handover request module, for when described terminal is current only have general service or a group service time, to described LTE core network or to described cluster core net transmit path handover request;
Second terminal contexts release module, for receiving after path that described LTE core network or described cluster core net return switches and confirm, to described former base station transmitting terminal context release message, and receive described former base station terminal contexts Release complete of returning after performing terminal contexts release.
Preferably, described base station also comprises:
Data simultaneous module, for carrying out the synchronous of terminal data with described terminal.
The present invention also provides a kind of system of terminal switch, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that terminal needs to switch, sends handover request to target BS, and after the Handover Request Acknowledge receiving the transmission of described target BS, sends connect reallocation message to described terminal; And according to the context release message release terminal contexts received, and return terminal contexts Release complete to described target BS;
Described target BS, for when receiving the handover request that described former base station sends, returns Handover Request Acknowledge to described former base station; After the connection reprovision receiving the transmission of described terminal completes message, obtain the present type of service of described terminal; When the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request; Receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message.
The present invention also provides a kind of base station, as the former base station performing terminal switch, comprising:
Type of service acquisition module, for when judging that described terminal needs to switch, obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
First handover request module, for when the existing general service of described terminal has again group service, handover request is sent respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one;
First receiver module, for receiving the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one;
Connect reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network;
First terminal context release module, for after receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
Preferably, described base station also comprises:
Second handover request module, for when described terminal only has general service or group service, handover request is sent to described LTE core network or described cluster core net, wherein, the handover request received is transmitted to target BS by described LTE core network or described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns;
Second receiver module, for receiving the switching command comprising described connection reallocation message of described LTE core network or the transmission of described cluster core net;
Second connects reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described LTE core network or described cluster core net;
Second terminal contexts release module, for after receiving the release terminal contexts order that described LTE core network or described cluster core net send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network or described cluster core net.
The present invention also provides a kind of system of terminal switch, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that described terminal needs to switch, obtains the type of service that described terminal is current; When the existing general service of described terminal has again group service, send handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network; Receive the switching command of described cluster core net and the transmission of described LTE core network, wherein, in switching command described at least one, comprise the connection reallocation message of described terminal; The connection reallocation message received is sent to described terminal, and wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and sends to described target BS; After receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network;
Target BS, for after the handover request receiving described cluster core net and the transmission of described LTE core network, return Handover Request Acknowledge to described cluster core net and described LTE core network, wherein, in Handover Request Acknowledge described at least one, comprise the connection reallocation message of described terminal; Receiving after described connection reprovision completes message, send switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network.
The present invention has following beneficial effect:
Hand-off process when the existing general service of terminal has again a group service can be performed, and terminal keeps the connection with two core net simultaneously, general service is only in LTE core network, and group service is only in cluster core net, the isolation of abundant guarantee two kinds of business, is independent of each other.
Accompanying drawing explanation
The network architecture schematic diagram that Fig. 1 is core net of the prior art isolation, Access Network is shared;
Fig. 2 is a terminal attachment flow schematic diagram of the embodiment of the present invention;
Fig. 3 is another terminal attachment flow schematic diagram of the embodiment of the present invention;
Fig. 4 is a updating of terminal position schematic flow sheet of the embodiment of the present invention;
Fig. 5 is another updating of terminal position schematic flow sheet of the embodiment of the present invention;
Fig. 6 is a Terminal Service request schematic flow sheet of the embodiment of the present invention;
Fig. 7 is another Terminal Service request schematic flow sheet of the embodiment of the present invention;
Fig. 8 is one of the embodiment of the present invention based on the method flow schematic diagram of the terminal switch of X2 interface;
Fig. 9 is another method flow schematic diagram based on the terminal switch of X2 interface of the embodiment of the present invention;
Figure 10 is one of the embodiment of the present invention based on the method flow schematic diagram of the terminal switch of S1 interface;
Figure 11 is another method flow schematic diagram based on the terminal switch of S1 interface of the embodiment of the present invention;
Figure 12 is the structural representation of a base station of the embodiment of the present invention;
Figure 13 is the structural representation of another base station of the embodiment of the present invention.
Embodiment
The network architecture at the terminal place in the embodiment of the present invention is core net isolation, the network architecture that Access Network is shared, this terminal is attached to cluster core net and LTE core network simultaneously, for solve the existing general service of terminal in prior art have again a group service time, there is no the problem of corresponding hand-off process mode, the method of two kinds of terminal switch is proposed in the embodiment of the present invention, one is the changing method of the terminal based on X2 interface (interface between base station and base station), one is the changing method of the terminal based on S1 interface (interface between base station and core net), to perform hand-off process when the existing general service of terminal has again a group service, to illustrate below.
For convenience of understanding, before the changing method of terminal is described, first the attachment flow of terminal, periodic location update flow process and se ce request procedure are briefly described.
terminal attachment flow:
Please refer to Fig. 2, be a terminal attachment flow schematic diagram of the embodiment of the present invention, the method can comprise the following steps:
Step 201, after terminal (UE) start, sends attachment request to base station (eNB).
Step 202, base station by this attachment request forward to cluster core net.
Step 203, cluster core net, carries out mutual between base station and terminal, perform existing attachment flow.Particularly, the step 3 of the attaching process of 23.401 regulations is performed to step 16.
Step 204, cluster core net sends position updating request to LTE core network, carries out position registration to make terminal in cluster core net and LTE core network simultaneously.
Step 205, LTE core network upgrades to cluster core net home position and confirms.
Step 206, LTE core network, carries out mutual between base station and terminal, perform existing attachment flow.Particularly, the step 17 of the attaching process of 23.401 regulations is performed to step 26.
Above-mentioned attachment flow is that terminal arrives first cluster core net and carries out position registration, then notifies that LTE core network is registered terminal position in LTE core network by cluster core net, can be attached to cluster core net and LTE core network to make terminal simultaneously.
Please refer to Fig. 3, be another terminal attachment flow schematic diagram of the embodiment of the present invention, the method can comprise the following steps:
Step 301, after starting up of terminal, sends attachment request to base station (eNB).
Step 302, base station by this attachment request forward to LTE core network.
Step 303, LTE core network, carries out mutual between base station and terminal, perform existing attachment flow.Particularly, the step 3 of the attaching process of 23.401 regulations is performed to step 16.
Step 304, LTE core network sends position updating request to cluster core net, carries out position registration to make terminal in cluster core net and LTE core network simultaneously.
Step 305, cluster core net upgrades to LTE core network home position and confirms.
Step 306, carries out mutual, performs existing attachment flow between cluster core net and terminal.Particularly, the step 17 of the attaching process of 23.401 regulations is performed to step 26.
Above-mentioned attachment flow is that terminal arrives first LTE core network and carries out position registration, then notifies that cluster core net is registered terminal position in cluster core net by LTE core network, can be attached to cluster core net and LTE core network to make terminal simultaneously.
In above-mentioned two flow processs, base station is before forwarding attachment request, first can also judge that terminal is current and whether be in the region supporting group service, if terminal is current not in the region supporting group service, then send attachment to LTE core network to ask, and LTE core network does not need to send position updating request to cluster core net, if terminal is current be in the region supporting group service, then can send attachment request to cluster core net, then send position updating request by cluster core net to LTE core network.
terminal periodic position update flow:
Please refer to Fig. 4, be a updating of terminal position schematic flow sheet of the embodiment of the present invention, the method can comprise the following steps:
Step 401, terminal, when idle condition, regularly sends TAU(Tracking Area Update, tracing section updating to base station) request.
Step 402, base station by this TAU request forward to cluster core net.
Step 403, cluster core net, carries out mutual between base station and terminal, perform existing position update flow.Particularly, the step 4 of the TAU process of 23.401 regulations is performed to step 19.
Step 404, cluster core net sends position updating request to LTE core network.
Step 405, LTE core network upgrades to cluster core net home position and confirms.
Step 406, cluster core net sends location updating to terminal and accepts message.
Step 407, terminal has upgraded message to cluster core net home position.
Above-mentioned position update flow is that first terminal upgrades to cluster core net launch position, carries out location updating in cluster core net, then notifies that LTE core network carries out the location updating of terminal by cluster core net.
Please refer to Fig. 5, be another updating of terminal position schematic flow sheet of the embodiment of the present invention, the method can comprise the following steps:
Step 501, terminal, when idle condition, regularly sends TAU request to base station.
Step 502, base station by this TAU request forward to LTE core network.
Step 503, LTE core network, carries out mutual between base station and terminal, perform existing position update flow.Particularly, the step 4 of the TAU process of 23.401 regulations is performed to step 19.
Step 504, LTE core network sends position updating request to cluster core net.
Step 505, cluster core net upgrades to LTE core network home position and confirms.
Step 506, LTE core network sends location updating to terminal and accepts message.
Step 507, terminal has upgraded message to LTE core network home position.
Above-mentioned position update flow is that first terminal upgrades to LTE core network launch position, carries out location updating in LTE core network, then notifies that cluster core net carries out the location updating of terminal by LTE core network.
terminal Service request flow process:
The se ce request procedure of the terminal under idle condition:
Terminal, under Idle state, if there is general service to arrive, then initiates se ce request procedure to LTE core network; If there is group service to arrive, then initiate se ce request procedure to cluster core net.If terminal simultaneously existing general service has group service again, then preferentially initiate the service request of group service.
The se ce request procedure of the terminal under connection status:
Please refer to Fig. 6, be a Terminal Service request schematic flow sheet of the embodiment of the present invention, the method can comprise the following steps:
Step 601, when terminal is carrying out group service communication (namely terminal is in connection status), and when general service arrives, terminal sends upstream message transmission to base station, carries service request in described upstream message transmission.
Step 602, this service request is transmitted to LTE core network by base station.
Step 603, LTE core network sends initial context and sets up request to base station.Optionally, LTE core network, before send initial context foundation request to base station, first can also carry out authentication to terminal.
Step 604, the relevant UE context of general service is set up in base station, and sends connection reallocation message to terminal.Only need comprise in this reallocation message for the relevant radio bearer of this general service foundation and configure accordingly.Now, base station without the need to sending safe mode command (Security Mode Command) again because safe mode activates.Also namely, the safe mode before safe mode adopts during connection establishment, and without the need to adopting new safe mode.
Step 605, terminal returns connection reprovision and completes message to base station.
Step 606, base station returns initial context to LTE core network and has set up message, upgrades respective carrier to make LTE core network.
Please refer to Fig. 7, be another Terminal Service request schematic flow sheet of the embodiment of the present invention, the method can comprise the following steps:
Step 701, when terminal is carrying out general service communication (namely terminal is in connection status), and when group service arrives, terminal sends upstream message to base station, carries service request in described upstream message.
Step 702, this service request is transmitted to cluster core net by base station.
Step 703, cluster core net sends initial context and sets up request to base station.Optionally, cluster core net, before send initial context foundation request to base station, first can also carry out authentication to terminal.
Step 704, the relevant UE context of group service is set up in base station, and sends connection reallocation message to terminal.Only need comprise in this reallocation message for the relevant radio bearer of this group service foundation and configure accordingly.Now, base station without the need to sending safe mode command (Security Mode Command) again because safe mode activates.Also namely, the safe mode before safe mode adopts during connection establishment, and without the need to adopting new safe mode.
Step 705, terminal returns connection reprovision and completes message to base station.
Step 706, base station returns initial context to cluster core net and has set up message, upgrades respective carrier to make cluster core net.
In above-mentioned two se ce request procedure, because terminal is when sending service request to base station, terminal is in connection status, so without the need to setting up RRC(Radio Resource Control again, radio resource control) connect, also just no longer complete service request information incidentally by connection establishment, but carry out service request information incidentally by RRC information (UL Information Transfer, upstream message is transmitted).
In above-mentioned two se ce request procedure, terminal keeps being connected with two core net simultaneously, and general service is only in LTE core network, and group service, then only in cluster core net, fully can ensure the isolation of two kinds of business like this, be independent of each other.
based on the terminal switch flow process of X2 interface
Please refer to Fig. 8, for the embodiment of the present invention one based on the method flow schematic diagram of the terminal switch of X2 interface, the method can comprise the following steps:
Step 801, target BS, when the handover request that the former base station received belonging to terminal sends, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Step 802, described target BS, after the connection reprovision receiving the transmission of described terminal completes message, obtains the present type of service of described terminal;
Step 803, when the current existing general service of described terminal has again group service, described target BS is respectively to described cluster core net and described LTE core network transmit path handover request;
Step 804, described target BS receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message;
Step 805, the terminal contexts Release complete that described target BS returns after receiving described former base station release terminal contexts.
The switching flow that the existing group service of terminal has again the terminal of general service in above-described embodiment, when terminal only has general service or only have group service, can according to the switching of following flow performing terminal:
(1) when described terminal is current only have a general service time, described target BS is to described LTE core network transmit path handover request; Described target BS is receiving after path that described LTE core network returns switches and confirm, to described former base station transmitting terminal context release message, wherein, described former base station according to the context release message release terminal contexts received, and can return terminal contexts Release complete to described target BS.
(2) when described terminal is current only have a group service time, described target BS is to described cluster core net transmit path handover request; Described target BS is receiving after path that described cluster core net returns switches and confirm, to described former base station transmitting terminal context release message, wherein, described former base station according to the context release message release terminal contexts received, and can return terminal contexts Release complete to described target BS.
In above-described embodiment, described target BS returns the step of Handover Request Acknowledge and described target BS and receives between step that connection reprovision that described terminal sends completes message and also comprise to described former base station: described target BS and described terminal carry out the synchronous step of terminal data.
Please refer to Fig. 9, is another method flow schematic diagram based on the terminal switch of X2 interface of the embodiment of the present invention, in this embodiment, terminal is attached to cluster core net and LTE core network simultaneously, and the existing group service of terminal, have general service again, the method can comprise the following steps:
Step 901, terminal sends measurement to former base station and reports.
Step 902, going to work according to described measurement in former base station, judges that terminal is the need of switching, if so, performs step 903, otherwise continue to perform step 902.
Step 903, former base station sends handover request to target BS.
Step 904, target BS, when receiving this handover request, returns Handover Request Acknowledge to described former base station.
Step 905, former base station sends connection reallocation message according to described Handover Request Acknowledge to described terminal,
Step 906, terminal data is transmitted to target BS by former base station.
Step 907, target BS carries out the synchronous of terminal data with terminal.
Step 908, terminal returns connection reprovision to target BS and completes message.
Step 909, target BS is after the connection reprovision receiving the transmission of described terminal completes message, obtain the present type of service of described terminal, when the current existing general service of described terminal has again group service, described target BS is respectively to described cluster core net and described LTE core network transmit path handover request.
Step 910, LTE core network and cluster core net carry out the switching of corresponding path after receiving described path handover request respectively, and send the end mark of packet to former base station, switch simultaneously confirm to target BS return path.
Step 911, target BS receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message.
Step 912, former base station is according to the context release message release terminal contexts received.
Step 913, former base station returns terminal contexts Release complete to target BS.
based on the terminal switch flow process of S1 interface
Please refer to Figure 10, for the embodiment of the present invention one based on the schematic flow sheet of the method for the terminal switch of S1 interface, the method can comprise the following steps:
Step 1001, former base station is when judging that terminal needs to switch, and obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously.
Step 1002, when the existing general service of described terminal has again group service, described former base station sends handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one.
Step 1003, described former base station receives the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one.
Step 1004, the connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network.
Step 1005, after described former base station receives the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
The switching flow that the existing group service of terminal has again the terminal of general service in above-described embodiment, when terminal only has general service or only have group service, can according to the switching of following flow performing terminal:
(1) when described terminal only has general service, described former base station sends handover request to described LTE core network, wherein, the handover request received is transmitted to target BS by described LTE core network, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns; Described former base station receives the switching command comprising described connection reallocation message that described LTE core network sends; The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described LTE core network; After described former base station receives the release terminal contexts order that described LTE core network sends afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network.
(2) when described terminal only has group service, described former base station sends handover request to described cluster core net, wherein, the handover request received is transmitted to target BS by described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns; Described former base station receives the switching command comprising described connection reallocation message that described cluster core net sends; The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described cluster core net; After described former base station receives the release terminal contexts order that described cluster core net sends afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net.
Please refer to Figure 11, is another schematic flow sheet based on the method for the terminal switch of S1 interface of the embodiment of the present invention, in this embodiment, terminal is attached to cluster core net and LTE core network simultaneously, and the existing group service of terminal, have general service again, the method can comprise the following steps:
Step 1101, terminal sends measurement to former base station and reports.
Step 1102, the measurement that former base station sends according to terminal reports, and judges that terminal is the need of switching, if so, performs step 1103, otherwise continues to perform step 1102.
Step 1103, when judging that terminal needs to switch, obtains the type of service that described terminal is current.
Step 1104, when the existing general service of described terminal has again group service, described former base station sends handover request respectively to described cluster core net and described LTE core network, wherein, comprises the information of former base station to object base station in handover request described at least one.In the present embodiment, suppose not comprise the information of former base station to object base station in the handover request that former base station sends to cluster core net, in the handover request that LTE core network sends, comprise the information of former base station to object base station.
Step 1105, the handover request received is transmitted to target BS by described cluster core net and described LTE core network.
Step 1106, described target BS returns Handover Request Acknowledge to described cluster core net and described LTE core network, wherein, comprises the connection reallocation message of described terminal in Handover Request Acknowledge described at least one.In the present embodiment, do not comprise the connection reallocation message of described terminal in the Handover Request Acknowledge that target BS returns to described cluster core net, in the Handover Request Acknowledge that LTE core network returns, comprise the connection reallocation message of described terminal.
Described cluster core net and described LTE core network are after the handover request receiving the transmission of former base station, can perform to the 8th step according to the 3rd step of the switching flow based on S1 interface of 3GPP23.401, wherein, above-mentioned steps 1106 is the 5th steps wherein, target BS is after receiving the handover request of core net, if include the information of former base station to object base station in handover request, then prepare according to information wherein the RRC connection reallocation message issuing terminal, and be carried in switching request acknowledgement message.If from not comprising the information of former base station to object base station in the handover request of core net, although or contain but received the handover request of another core net before and comprised the information of former base station to object base station, then target BS does not comprise the RRC connection reallocation message sending to terminal in switching request acknowledgement message.
Step 1107, described cluster core net and described LTE core network send switching command to former base station, wherein, comprise described connection reallocation message in switching command described at least one.In the present embodiment, do not comprise described connection reallocation message in the switching command that described cluster core net sends to former base station, described LTE core network comprises described connection reallocation message to the switching command that former base station sends.
Step 1108, the connection reallocation message in the switching command received is sent to described terminal by described former base station.
If the existing general service of terminal, has group service again, after former base station needs the switching command of LTE core network and cluster core net by the time, extract wherein from the RRC information of target BS, send to terminal (connection reallocation message).If do not receive the switching command of one of them core net in source base station a period of time, or receive be switch refusal order, the RRC information in the switching command of another core net is extracted in former base station, sends to terminal.If the switching command of two core net is all confiscated or receive to be switch refusal order, then stop switching flow.
In addition, former base station, after receiving the switching command of one of them core net, can start the data retransmission (switching flow based on S1 interface the 10th step of foundation 3GPP23.401 is to the 11st step) carrying out corresponding service with this core net.
Step 1109, the attachment removal of former base station, described terminal is reshuffled according to the connection reallocation message received, and carries out data syn-chronization with target BS.
Step 1110, described terminal generates connection reprovision and completes message, and sends to described target BS.
Step 1111, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network.
Target BS receives and connects after reprovision completes message, and can send switching notice respectively to my cluster core net after LTE core network, follow-up core net is undertaken operating (switching flow based on S1 interface the 13rd step of 3GPP23.401 is to the 21st step) by standard.To the 19th step wherein, after former base station waits receives the release UE context commands of two core net, perform the release of UE context, and feed back UE context Release complete respectively.
Step 1112, described cluster core net and described LTE core network, after the switching completing terminal, send the order of release terminal contexts to former base station.
Step 1113, after described former base station receives this release terminal contexts order, release terminal contexts.
Step 1114, described former base station returns terminal contexts Release complete to described cluster core net and described LTE core network.
Then, according to the 19th to the 21st step based on the switching flow of S1 interface in 23.401, mutual with target BS respectively by LTE core network, cluster core net, complete the switching of terminal.
Please refer to Figure 12, is the structural representation of a base station of the embodiment of the present invention, and this base station, as the target BS performing terminal switch, comprising:
Handover Request Acknowledge module, for when receiving the handover request of the former base station transmission belonging to terminal, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Type of service acquisition module, after completing message at the connection reprovision receiving the transmission of described terminal, obtains the present type of service of described terminal;
First via footpath switches request module, for when the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request;
First terminal context release module, for receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message, and the terminal contexts Release complete returned after receiving described former base station release terminal contexts.
When terminal only has general service or only have group service, this base station can also comprise:
Second path handover request module, for when described terminal is current only have general service or a group service time, to described LTE core network or to described cluster core net transmit path handover request;
Second terminal contexts release module, for receiving after path that described LTE core network or described cluster core net return switches and confirm, to described former base station transmitting terminal context release message, and the terminal contexts Release complete returned after receiving former base station release terminal contexts.
In above-described embodiment, described target BS is to after described former base station returns Handover Request Acknowledge, and described target BS receives before connection reprovision that described terminal sends completes message, also needs to carry out the synchronous of terminal data with described terminal.Because the base station of the embodiment of the present invention can also comprise: data simultaneous module, for carrying out the synchronous of terminal data with described terminal.
The embodiment of the present invention also provides a kind of system of terminal switch, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that terminal needs to switch, sends handover request to target BS, and after the Handover Request Acknowledge receiving the transmission of described target BS, sends connect reallocation message to described terminal; And according to the context release message release terminal contexts received, and return terminal contexts Release complete to described target BS;
Described target BS, for when receiving the handover request that described former base station sends, returns Handover Request Acknowledge to described former base station; After the connection reprovision receiving the transmission of described terminal completes message, obtain the present type of service of described terminal; When the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request; Receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message.
Please refer to Figure 13, is the structural representation of another base station of the embodiment of the present invention, and this base station, as the former base station performing terminal switch, comprising:
Type of service acquisition module, for when judging that described terminal needs to switch, obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
First handover request module, for when the existing general service of described terminal has again group service, handover request is sent respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one;
First receiver module, for receiving the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one;
Connect reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network;
First terminal context release module, for after receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
When terminal only has general service or only have group service, this base station can also comprise:
Second handover request module, for when described terminal only has general service or group service, handover request is sent to described LTE core network or described cluster core net, wherein, the handover request received is transmitted to target BS by described LTE core network or described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns;
Second receiver module, for receiving the switching command comprising described connection reallocation message of described LTE core network or the transmission of described cluster core net;
Second connects reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described LTE core network or described cluster core net;
Second terminal contexts release module, for after receiving the release terminal contexts order that described LTE core network or described cluster core net send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network or described cluster core net.
The embodiment of the present invention also provides a kind of system of terminal switch, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that described terminal needs to switch, obtains the type of service that described terminal is current; When the existing general service of described terminal has again group service, send handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network; Receive the switching command of described cluster core net and the transmission of described LTE core network, wherein, in switching command described at least one, comprise the connection reallocation message of described terminal; The connection reallocation message received is sent to described terminal, and wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and sends to described target BS; After receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network;
Target BS, for after the handover request receiving described cluster core net and the transmission of described LTE core network, return Handover Request Acknowledge to described cluster core net and described LTE core network, wherein, in Handover Request Acknowledge described at least one, comprise the connection reallocation message of described terminal; Receiving after described connection reprovision completes message, send switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a method for terminal switch, is characterized in that, comprising:
Target BS, when the handover request that the former base station received belonging to terminal sends, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Described target BS, after the connection reprovision receiving the transmission of described terminal completes message, obtains the present type of service of described terminal;
When the current existing general service of described terminal has again group service, described target BS is respectively to described cluster core net and described LTE core network transmit path handover request;
Described target BS receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message;
Described target BS receives the terminal contexts Release complete that described former base station returns after performing terminal contexts release.
2. the method for claim 1, is characterized in that, also comprises after the step of the present type of service of the described terminal of described acquisition:
When described terminal is current only have general service or a group service time, described target BS is to described LTE core network or to described cluster core net transmit path handover request;
Described target BS receiving after path that described LTE core network or described cluster core net return switches and confirm, to described former base station transmitting terminal context release message;
Described target BS receives the terminal contexts Release complete that described former base station returns after performing terminal contexts release.
3. method as claimed in claim 1 or 2, is characterized in that, described target BS returns the step of Handover Request Acknowledge and described target BS and receives between step that connection reprovision that described terminal sends completes message and also comprise to described former base station:
Described target BS carries out the synchronous of terminal data with described terminal.
4. a method for terminal switch, is characterized in that, comprising:
Former base station is when judging that terminal needs to switch, and obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
When the existing general service of described terminal has again group service, described former base station sends handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one;
Described former base station receives the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one;
The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described cluster core net and described LTE core network;
After described former base station receives the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
5. method as claimed in claim 4, is characterized in that, also comprise after the step of the present type of service of the described terminal of described acquisition:
When described terminal only has general service or group service, described former base station sends handover request to described LTE core network or described cluster core net, wherein, the handover request received is transmitted to target BS by described LTE core network or described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns;
Described former base station receives the switching command comprising described connection reallocation message of described LTE core network or the transmission of described cluster core net;
The connection reallocation message received is sent to described terminal by described former base station, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS is receiving after described connection reprovision completes message, switching notice is sent, to complete the switching of described terminal to described LTE core network or described cluster core net;
After described former base station receives the release terminal contexts order that described LTE core network or described cluster core net send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network or described cluster core net.
6. a base station, as the target BS performing terminal switch, is characterized in that, comprising:
Handover Request Acknowledge module, for when receiving the handover request of the former base station transmission belonging to terminal, returns Handover Request Acknowledge to described former base station, and wherein, described former base station can send connection reallocation message according to described Handover Request Acknowledge to described terminal; Described terminal is attached to cluster core net and LTE core network simultaneously;
Type of service acquisition module, after completing message at the connection reprovision receiving the transmission of described terminal, obtains the present type of service of described terminal;
First via footpath switches request module, for when the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request;
First terminal context release module, for receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message, and receive described former base station terminal contexts Release complete of returning after performing terminal contexts release.
7. base station as claimed in claim 6, is characterized in that, also comprise:
Second path handover request module, for when described terminal is current only have general service or a group service time, to described LTE core network or to described cluster core net transmit path handover request;
Second terminal contexts release module, for receiving after path that described LTE core network or described cluster core net return switches and confirm, to described former base station transmitting terminal context release message, and receive described former base station terminal contexts Release complete of returning after performing terminal contexts release.
8. base station as claimed in claims 6 or 7, is characterized in that, also comprise:
Data simultaneous module, for carrying out the synchronous of terminal data with described terminal.
9. a system for terminal switch, is characterized in that, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that terminal needs to switch, sends handover request to target BS, and after the Handover Request Acknowledge receiving the transmission of described target BS, sends connect reallocation message to described terminal; And according to the context release message release terminal contexts received, and return terminal contexts Release complete to described target BS;
Described target BS, for when receiving the handover request that described former base station sends, returns Handover Request Acknowledge to described former base station; After the connection reprovision receiving the transmission of described terminal completes message, obtain the present type of service of described terminal; When the current existing general service of described terminal has again group service, respectively to described cluster core net and described LTE core network transmit path handover request; Receiving after path that described cluster core net and described LTE core network return switches and confirm, to described former base station transmitting terminal context release message.
10. a base station, as the former base station performing terminal switch, is characterized in that, comprising:
Type of service acquisition module, for when judging that described terminal needs to switch, obtain the type of service that described terminal is current, wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
First handover request module, for when the existing general service of described terminal has again group service, handover request is sent respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network, and receive the Handover Request Acknowledge that described target BS returns, comprise the connection reallocation message of described terminal in Handover Request Acknowledge described at least one;
First receiver module, for receiving the switching command of described cluster core net and the transmission of described LTE core network, wherein, comprises described connection reallocation message in switching command described at least one;
Connect reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network;
First terminal context release module, for after receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network.
11. base stations as claimed in claim 10, is characterized in that, also comprise:
Second handover request module, for when described terminal only has general service or group service, handover request is sent to described LTE core network or described cluster core net, wherein, the handover request received is transmitted to target BS by described LTE core network or described cluster core net, and receives the Handover Request Acknowledge comprising the connection reallocation message of described terminal that described target BS returns;
Second receiver module, for receiving the switching command comprising described connection reallocation message of described LTE core network or the transmission of described cluster core net;
Second connects reprovision module, for the connection received reallocation message is sent to described terminal, wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and send to described target BS, described target BS, receiving after described connection reprovision completes message, sends switching notice, to complete the switching of described terminal to described LTE core network or described cluster core net;
Second terminal contexts release module, for after receiving the release terminal contexts order that described LTE core network or described cluster core net send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described LTE core network or described cluster core net.
The system of 12. 1 kinds of terminal switch, is characterized in that, comprising: terminal, former base station, target BS, LTE core network and cluster core net, and wherein, described terminal is attached to cluster core net and LTE core network simultaneously;
Described former base station, for when judging that described terminal needs to switch, obtains the type of service that described terminal is current; When the existing general service of described terminal has again group service, send handover request respectively to described cluster core net and described LTE core network, wherein, the handover request received is transmitted to target BS by described cluster core net and described LTE core network; Receive the switching command of described cluster core net and the transmission of described LTE core network, wherein, in switching command described at least one, comprise the connection reallocation message of described terminal; The connection reallocation message received is sent to described terminal, and wherein, described terminal can generate connection reprovision according to the connection reallocation message received and complete message, and sends to described target BS; After receiving the release terminal contexts order that described cluster core net and described LTE core network send afterwards in the switching completing terminal, release terminal contexts, and return terminal contexts Release complete to described cluster core net and described LTE core network;
Target BS, for after the handover request receiving described cluster core net and the transmission of described LTE core network, return Handover Request Acknowledge to described cluster core net and described LTE core network, wherein, in Handover Request Acknowledge described at least one, comprise the connection reallocation message of described terminal; Receiving after described connection reprovision completes message, send switching notice, to complete the switching of described terminal to described cluster core net and described LTE core network.
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