CN108464038A

CN108464038A - Method, base station, mobile management entity and the terminal of circuit domain dropping

Info

Publication number: CN108464038A
Application number: CN201780005485.5A
Authority: CN
Inventors: 何岳; 金辉; 杨皓睿; 欧阳国威
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-11-25
Filing date: 2017-06-08
Publication date: 2018-08-28
Anticipated expiration: 2037-06-08
Also published as: WO2018095015A1; CN108464038B

Abstract

The embodiment of the present invention provides a kind of method of circuit domain dropping, base station, mobile management entity and terminal.This method includes：Base station receives the first message that mobile management entity is sent, and first message is used to indicate base station first terminal and needs circuit domain dropping.Base station determines that the interconnection technique between first terminal and second terminal, base station send second message according to interconnection technique to first terminal, and second message is used to indicate the mode of first termination circuit domain dropping.In the embodiment of the present invention, when base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and be connect with the RRC of first terminal, enable first terminal while carrying out CS business, PS business can also be carried out by the connection with second terminal.And when base station determines that first terminal is connect with second terminal using 3GPP technologies, base station makes second terminal remain RRC contextual informations, so as to can quickly carry out PS business after terminating CS business.

Description

Method, base station, mobile management entity and the terminal of circuit domain dropping

This application claims on November 25th, 2016 submit China State Intellectual Property Office Patent Office, application No. is a kind of 201611064469.7, priority of the Chinese patent application of entitled " method of circuit domain dropping ", entire contents are hereby incorporated by reference in the application.

Technical field

The present invention relates to field of communication technology more particularly to a kind of method of circuit domain dropping, base station, mobile management entity and terminals.

Background technique

Wearable device (Wearable device, WD) is more and more favored because it has the advantages such as intelligent, carrying is convenient, beautiful and stylish.Currently, the wrist-watch of mountable client identification module (Subscriber Identification Module, SIM) card has been introduced in industry, which can be directly connected to network and carries out voice calling service, without connecting with mobile phone.WD is connected directly to network and supports that voice calling service is following development trend.But since WD is limited by volume, battery capacity is small, will lead to that battery consumption is fast, and stand-by time is short if directly communicated with base station network.And WD normally shape is special, Antenna Design is difficult, is only able to achieve single antenna at present, in the case where sending same quantity of data, compared to multi-antenna, needs to take more time, expend many Internet resources.Therefore, WD usually passes through terminal and is connected to network, to save electricity, increases number of network connections and simultaneously improves efficiency of transmission.Above-mentioned terminal includes the equipment that mobile phone etc. can be grouped exchange (Packet Switch, PS) business.

Currently, the type of voice communication includes voice service (Voice over Long Term Evolution, VoLTE) and circuit switching (Circuit Switched, CS) voice service based on long evolving system.WD usually only supports CS voice service or supports VoLTE voice service and CS voice service simultaneously.When network where WD and its supports VoLTE voice service, after WD is connected to terminal, carry out what VoLTE voice service can be achieved on by relaying (relay) link between terminal.But when the place WD and/or WD network does not support VoLTE voice service, there are no the schemes for solving the problems, such as to carry out CS voice service using the WD for having been connected to terminal in such cases in the prior art.

Summary of the invention

The embodiment of the invention provides a kind of method of circuit domain dropping, base station, mobile management entity and terminals, to solve the problems, such as that the first terminal for being connected to second terminal can not carry out voice communication.

In a first aspect, the embodiment of the invention provides a kind of methods of circuit domain dropping.This method comprises: base station receives the first message that mobile management entity is sent, first message is used to indicate base station first terminal and needs circuit domain dropping.Base station determines the interconnection technique between first terminal and second terminal, and base station sends second message to first terminal according to interconnection technique, and second message is used to indicate the mode of first termination circuit domain dropping.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, after base station, which is used to indicate first terminal from mobile management entity reception, needs the message of circuit domain dropping, base station determines the interconnection technique between first terminal bar and second terminal, and second message is sent to first terminal according to interconnection technique, in a manner of indicating first termination circuit domain dropping.Solve the problems, such as that the first terminal for being connected to second terminal in the prior art can not carry out voice communication.

In a kind of possible embodiment, base station determines the interconnection technique between first terminal and second terminal, comprising: base station determines the interconnection technique between first terminal and second terminal according to the contextual information of first terminal；Alternatively, base station receives the first instruction information that mobile management entity is sent, base station determines the interconnection technique between first terminal and second terminal according to the first instruction information；Alternatively, base station receives the second indication information that first terminal is sent, base station determines the interconnection technique between first terminal and second terminal according to second indication information.By using the embodiment, base station can determine the interconnection technique between first terminal and second terminal, and then determine the content for being used to indicate the second message of first termination circuit domain dropping mode.

In a kind of possible embodiment, base station sends second message to first terminal according to interconnection technique, second message is used to indicate the mode of first termination circuit domain dropping, if including: interconnection technique is non-third generation partner program non-3GPP technology, second message instruction first terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, second message instruction first terminal hangs up the RRC connection between base station in circuit domain dropping if interconnection technique is 3GPP technology.By using the embodiment, when base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.And when base station indicates that information determines that first terminal is connect with second terminal using 3GPP technology by indirect access technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

In a kind of possible embodiment, if interconnection technique is non-3GPP technology, this method further include: if the inactive timer expiry of second terminal, base station does not discharge the RRC connection of second terminal.Pass through the embodiment, when base station determines that second terminal does not carry out data receiver and sends business, inactive timer is not started, second terminal cannot propagate into Idle state, to make first terminal that can quickly access second terminal after terminating CS voice service to carry out PS business, time and signaling consumption that terminal enters connected state from Idle state are saved.

Second aspect, the embodiment of the invention provides a kind of methods of circuit domain dropping.This method comprises: mobile management entity receives the first message that first terminal is sent, first message is used to indicate first terminal and needs circuit domain dropping.Mobile management entity sends second message to base station, and second message is used to indicate base station first terminal and needs circuit domain dropping.

In a kind of possible embodiment, first message includes the interconnection technique between first terminal and second terminal.

In a kind of possible embodiment, second message includes the interconnection technique between first terminal and second terminal.

The third aspect, the embodiment of the invention provides a kind of methods of circuit domain dropping.This method comprises: first terminal sends first message to mobile management entity, first message is used to indicate first terminal and needs circuit domain dropping.First terminal receives the second message that base station is sent, and second message is used to indicate the mode of first termination circuit domain dropping, and first terminal carries out circuit domain dropping according to second message.

In a kind of possible embodiment, first terminal carries out circuit domain dropping according to second message, comprising: first Terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, first terminal hangs up the RRC connection between base station in circuit domain dropping.

Fourth aspect, the embodiment of the invention provides a kind of base station, which may be implemented function performed by base station in the application program authorization method of above-mentioned first aspect, and function can also execute corresponding software realization by hardware realization by hardware.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes receiving module, sending module and processing module.Receiving module is used to receive the first message of mobile management entity transmission, and first message is used to indicate base station first terminal and needs circuit domain dropping.Processing module is used to determine the interconnection technique between first terminal and second terminal.Sending module is used to send second message to first terminal according to interconnection technique, and second message is used to indicate the mode of first termination circuit domain dropping.

In a possible design, processing module is also used to: the interconnection technique between first terminal and second terminal is determined according to the contextual information of first terminal；Alternatively, determining the interconnection technique between first terminal and second terminal according to the first instruction information after the first instruction information that receiving module receives that mobile management entity is sent；Alternatively, determining the interconnection technique between first terminal and second terminal according to second indication information after the second indication information that receiving module receives that first terminal is sent.

In a possible design, sending module is also used to: after processing module determines interconnection technique for non-third generation partner program non-3GPP technology, second message is sent to first terminal according to interconnection technique, second message instruction first terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, sending second message to first terminal according to interconnection technique, second message instruction first terminal hangs up the RRC connection between base station in circuit domain dropping after processing module determines interconnection technique for 3GPP technology.

In a possible design, processing module is also used to after determining that interconnection technique is non-3GPP technology, if the inactive timer expiry of second terminal, does not discharge the RRC connection of second terminal.

5th aspect, the embodiment of the invention provides a kind of mobile management entities, function performed by mobile management entity in the application program authorization method of above-mentioned first aspect may be implemented in the mobile management entity, and function can also execute corresponding software realization by hardware realization by hardware.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes receiving module and sending module.Receiving module is used to receive the first message of first terminal transmission, and first message is used to indicate first terminal and needs circuit domain dropping.Sending module, for sending second message to base station, second message is used to indicate base station first terminal and needs circuit domain dropping.

In a possible design, first message includes the interconnection technique between first terminal and second terminal.

In a possible design, second message includes the interconnection technique between first terminal and second terminal.

6th aspect, the embodiment of the invention provides a kind of terminal, which may be implemented function performed by terminal in the application program authorization method of above-mentioned first aspect, and function can also execute corresponding software realization by hardware realization by hardware.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes receiving module, sending module and processing module.Sending module is used to send first message to mobile management entity, and first message is used to indicate first terminal and needs circuit domain dropping.Receiving module is used to receive the second message of base station transmission, and second message is used to indicate the mode of first termination circuit domain dropping.Processing module is used to carry out circuit domain dropping according to second message.

In a possible design, processing module is also used to: retaining the radio resource control RRC connection between base station in circuit domain dropping；Alternatively, hanging up the RRC connection between base station in circuit domain dropping.

7th aspect, the embodiment of the invention provides a kind of base station, which may be implemented function performed by base station in the application program authorization method of above-mentioned first aspect, and function can also execute corresponding software realization by hardware realization by hardware.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes processor, memory and communication interface.Memory is for storing program instruction.Processor is used to execute following operation in memory according to the program instruction stored: instruction communication interface receives the first message that mobile management entity is sent, and first message is used to indicate base station first terminal and needs circuit domain dropping；Determine that the interconnection technique between first terminal and second terminal, instruction communication interface send second message to first terminal according to interconnection technique, second message is used to indicate the mode of first termination circuit domain dropping.

In a possible design, processor is also used to execute following operation according to the program instruction stored in memory: determining the interconnection technique between first terminal and second terminal according to the contextual information of first terminal；Alternatively, instruction communication interface receives the first instruction information that mobile management entity is sent, and the interconnection technique between first terminal and second terminal is determined according to the first instruction information；Alternatively, instruction communication interface receives the second indication information that first terminal is sent, and the interconnection technique between first terminal and second terminal is determined according to second indication information.

In a possible design, processor is also used to execute following operation according to the program instruction stored in memory: determining that interconnection technique is non-third generation partner program non-3GPP technology, and indicating that communication interface sends second message to first terminal according to interconnection technique, second message instruction first terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, determining that interconnection technique is 3GPP technology, and indicate that communication interface sends second message to first terminal according to interconnection technique, second message instruction first terminal hangs up the RRC connection between base station in circuit domain dropping.

In a possible design, processor is also used to execute following operation according to the program instruction stored in memory: determining that interconnection technique does not discharge the RRC connection of second terminal if the inactive timer expiry of second terminal for non-3GPP technology.

Eighth aspect, the embodiment of the invention provides a kind of mobile management entities, function performed by mobile management entity in the application program authorization method of above-mentioned first aspect may be implemented in the mobile management entity, and function can also execute corresponding software realization by hardware realization by hardware.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes processor, memory and communication interface.Memory is for storing program instruction.Processor is used to execute following operation in memory according to the program instruction stored: instruction communication interface receives the first message that first terminal is sent, and first message is used to indicate first terminal and needs circuit domain dropping；And instruction communication interface receives to base station and sends second message, second message is used to indicate base station first terminal and needs circuit domain dropping.

9th aspect, the embodiment of the invention provides a kind of terminal, which may be implemented function performed by terminal in the application program authorization method of above-mentioned first aspect, and function can also execute corresponding software by hardware realization by hardware It realizes.Hardware or software include one or more above-mentioned corresponding modules of function.

In a possible design, which includes processor, memory and communication interface.Memory is for storing program instruction.Processor is used to execute following operation according to the program instruction stored in memory: instruction communication interface sends first message to mobile management entity, and first message is used to indicate first terminal and needs circuit domain dropping；And indicating that communication interface receives the second message that base station is sent, second message is used to indicate the mode of first termination circuit domain dropping；And circuit domain dropping is carried out according to second message.

In a possible design, processor is also used to execute following operation according to the program instruction stored in memory: retaining the radio resource control RRC connection between base station in circuit domain dropping；Alternatively, hanging up the RRC connection between base station in circuit domain dropping.

Compared to the prior art, the method for a kind of circuit domain dropping provided in an embodiment of the present invention, first terminal send CSFB to base station by mobile management entity and indicate that information and indirect access technology indicate information；Alternatively, base station sends indirect access technology inquiry request message to first terminal, and receives indirect access technology from first terminal and indicate information after first terminal sends CSFB instruction information to base station by mobile management entity.Base station indicates that information determines the interconnection technique between first terminal and second terminal according to indirect access technology.When base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.And when base station indicates that information determines that first terminal is connect with second terminal using 3GPP technology by indirect access technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Detailed description of the invention

Fig. 1 is a kind of use environment figure of wearable device provided in an embodiment of the present invention；

Fig. 2 is a kind of circuit domain fallback method communication scheme provided in an embodiment of the present invention；

Fig. 3 is the schematic diagram that wearable device provided in an embodiment of the present invention carries out CS voice service and PS business simultaneously；

Fig. 4 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention；

Fig. 5 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention；

Fig. 6 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention；

Fig. 7 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention；

Fig. 8 is a kind of structural schematic diagram of mobile management entity provided in an embodiment of the present invention；

Fig. 9 is a kind of structural schematic diagram of terminal provided in an embodiment of the present invention；

Figure 10 is the structural schematic diagram of another base station provided in an embodiment of the present invention；

Figure 11 is the structural schematic diagram of another mobile management entity provided in an embodiment of the present invention；

Figure 12 is the structural schematic diagram of another terminal provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described.

It should be noted that, the first terminal of the embodiment of the present invention can be wearable device, such as smartwatch, Intelligent bracelet, any one in intelligent glasses plurality of devices, first terminal can be by itself radio circuit and antenna, base station is transmitted wireless signals to, data communication can also be carried out by the communications such as bluetooth and second terminal.The equipment that second terminal can carry out PS business for mobile phone etc..

Fig. 1 is a kind of use environment figure of wearable device provided in an embodiment of the present invention.The embodiment of the present invention can be applied in scene as shown in Figure 1, the present embodiments relate to a kind of first terminals, the first terminal can be wearable device 10, the wearable device 10 or can be carried out wireless communication with a terminal 12 wirelessly with network side base station 11 and equipment of the core network 13.For example, the wearable device 10 can be by itself radio circuit and antenna, link 14 transmits wireless signals to base station 11 by wireless communication, and request base station 11 carries out wireless network traffic and handles 10 specific business need of wearable device；In another example, wearable device 10 can be matched by the bluetooth of itself with terminal 12, data communication is carried out by bluetooth communications link 15 with mobile phone after successful match, data communication can certainly be carried out by other communications and mobile phone, such as Radio Frequency Identification Technology, the short distance wireless communication technology etc..

Base station 11 is long evolving system (Long Term Evolution in the embodiment of the present invention, LTE evolved base station (the evolutional Node B in), eNB) or for 5G access network equipment (radio access network, RAN).

Equipment of the core network 13 can be mobile management entity (Mobility Management Entity in the embodiment of the present invention, MME), Service Gateway (Serving GateWay, S-GW), common data gateway (Public Data Network GateWay,) or service gateway nodes (Cellular Internet of Things-Serving Gateway Node, C-SGN) P-GW.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, first terminal send CSFB to base station by mobile management entity and indicate that information and indirect access technology indicate information；Alternatively, base station sends indirect access technology inquiry request message to first terminal, and receives indirect access technology from first terminal and indicate information after first terminal sends CSFB instruction information to base station by mobile management entity.Base station indicates that information determines the interconnection technique between first terminal and second terminal according to indirect access technology.When base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.And when base station indicates that information determines that first terminal is connect with second terminal using 3GPP technology by indirect access technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Fig. 2 is a kind of circuit domain fallback method communication scheme provided in an embodiment of the present invention.As shown in Fig. 2, the embodiment may include:

Step 201, first terminal to mobile management entity send expansion service request (Extended Service Request, ESR) message, circuit domain dropping (Circuit Switched Fallback, CSFB) instruction information is carried in ESR message and indirect access technology indicates (Indirect Access Tech Indication) information.

It should be noted that ESR message is extended service for requesting.CSFB instruction message is used to indicate first terminal and prepares to initiate circuit domain dropping business, circuit domain dropping business includes CSFB calling service, CSFB called service etc., and the embodiment of the present invention is illustrated the method for circuit domain dropping so that first terminal prepares to initiate CSFB calling service as an example.Indirect access technology instruction message is used to indicate the interconnection technique between first terminal and second terminal, interconnection technique is non-third generation partner program (3rd Generation Partnership Project, 3GPP) technology or 3GPP technology, first terminal are established by second terminal and base station and are communicated to connect.

Illustratively, non-3 gpp technology includes the wireless communication techniques such as bluetooth (Bluetooth, BT) technology, Wireless Fidelity (Wireless-Fidelity, Wi-Fi) technology.

Illustratively, 3GPP technology includes the communication technologys such as device-to-device (Device-to-Device, D2D) technology.

Illustratively, in step 201, first terminal send ESR message to mobile management entity can be with are as follows: first terminal sends ESR message to second terminal, and ESR message is sent to mobile management entity by second terminal.

Step 202, base station receives terminal contexts modification request (UE Context Modification Request) message from mobile management entity, and terminal contexts modify request message carrying CSFB instruction information and indirect access technology indicates information.

It should be noted that terminal contexts modification request message is for requesting base station to modify the context of first terminal.Wherein, the context of first terminal includes access bearer of the wireless heterogeneous networks (Radio Resource Control, RRC) between link information or gateway and base station.

Illustratively, after step 202, it can also include: base station to mobile management entity transmission terminal contexts modification request response (UE context Modification Response) message, the message is for informing mobile management entity: base station has received terminal contexts and modified solicited message and will be continued with according to solicited message.

Optionally, step 203, base station receives second generation mobile communication technology (2-Generation wireless telephone technology from first terminal, 2G) or 3rd generation mobile communication technology (3rd-Generation, 3G) the measurement report of cell, and Target cell is determined according to measurement report.Wherein, Target cell is the cell that first terminal needs to access during circuit domain dropping.

First terminal is usually injection frequency (Single Radio, SR) mode, the wireless signal of a carrier frequency can only be received a time point, therefore fourth generation mobile communication technology (4rd-Generation mobile communication technology cannot be resided in simultaneously, 4G) cell and 2G cell or 4G cell and 3G cell.In the 2G communication technology and the 3G communication technology, core net is divided into the domain CS and packet switch (Packet Switch, PS) domain, first terminal can carry out voice service by circuit signal in the cs domain, data service is carried out by network protocol (Internet Protocol, IP) data packet in the ps domain.And in the 4G communication technology, the domain CS is eliminated, first terminal can not carry out voice service by entering the domain CS when accessing 4G cell.

Step 204, base station determines that the interconnection technique between indirect access technology instruction information instruction first terminal and second terminal is non-3 gpp technology, and sends RRC connection reconfiguration to first terminal and set (connection reconfiguration) message.

It is reconfigured it should be noted that RRC connection reconfiguration sets wireless heterogeneous networks connection of the message for first terminal.Base station carries the access information of Target cell into the RRC reconfiguration message that first terminal is sent.For example, target is small The access information in area may come from step 203, and base station is according to the access information from the determining Target cell of the received measurement report of first terminal.In another example base station does not receive the measurement report of 2G or 3G cell from first terminal, that is, it is not carried out step 203, and has been stored with the access information of Target cell in base station.

Illustratively, step 204 can also be that base station determines that the interconnection technique between first terminal and second terminal is non-3 gpp technology, and send RRC connection reconfiguration to first terminal and set message by the contextual information of first terminal.

Illustratively, in step 204, base station sends RRC connection reconfiguration to first terminal and sets message, can be with are as follows: base station sends RRC connection reconfiguration to second terminal and sets message, and RRC connection reconfiguration is set message and is sent to first terminal by second terminal.

Illustratively, after step 204, can also to include: base station, which receive RRC connection reconfiguration from first terminal, sets completion (connection reconfiguration complete) message.Alternatively, second terminal is set from first terminal reception RRC connection reconfiguration completes message, base station sets from second terminal reception RRC connection reconfiguration and completes message.Wherein, RRC connection reconfiguration, which is set, completes message for signals base: first terminal is completed RRC connection reconfiguration and sets.

Illustratively, after step 204, it can also include: access information of the first terminal according to the Target cell carried in RRC reconfiguration message, be linked into Target cell.

It should be noted that in step 204, base station determines the interconnection technique between first terminal and second terminal as that will not discharge it and connect with the RRC of first terminal after non-3 gpp technology.Therefore, first terminal can carry out PS business using the communication link connecting with second terminal while the link by being directly connected to base station carries out CS voice service in communication system.For example, as shown in figure 3, first terminal is established connection by 3GPP radio frequency and base station and is carried out CS voice service based on 2G/3G protocol stack.Simultaneously, based on packet data convergence protocol (Packet Data Convergence Protocol, PDCP), wireless chain control layer (Radio Link Control, RLC), media access control layer (Media Access Control,) and physical layer (Physical Layer MAC, PHY) and bluetooth protocol repertory, PS business is carried out in communication system by Bluetooth RF.Wherein, above-mentioned communication system can be long term evolution (Long Term Evolution, LTE) communication system or other communication systems.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, first terminal sends CSFB to base station by mobile management entity and indicates that information and indirect access technology indicate information, when base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.

Fig. 4 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention.As shown in figure 4, the embodiment may include:

Step 401, first terminal sends ESR message to mobile management entity, carries circuit domain dropping CSFB in ESR message and indicates information.

It should be noted that ESR message is extended service for requesting.CSFB instruction message is used to indicate first terminal and prepares to initiate circuit domain dropping business, circuit domain dropping business includes CSFB calling service, CSFB called service etc., and the embodiment of the present invention is illustrated the method for circuit domain dropping so that first terminal prepares to initiate CSFB calling service as an example.

Step 402, base station receives terminal contexts from mobile management entity and modifies request message, and terminal contexts modification request message includes CSFB instruction information.

It should be noted that terminal contexts modification request message is for requesting base station to repair the context of first terminal Change.Wherein, the context of first terminal includes the access bearer between RRC link information or gateway and base station.

Illustratively, after step 402, it can also include: the context modification request response message that base station sends first terminal to mobile management entity, the message is for informing mobile management entity: base station has received the context modification request information of first terminal and will have been continued with according to solicited message.

Optionally, step 403, base station receives the measurement report of 2G or 3G cell from first terminal, and determines Target cell according to measurement report.Wherein, Target cell is the cell that first terminal needs to access during circuit domain dropping.

Description in above-described embodiment to step 203 can be found in the specific descriptions of step 403, therefore not to repeat here.

Step 404, base station sends indirect access technology inquiry request (Indirect Access Tech Inquiry) message to first terminal.

It should be noted that access technology inquiry request message is used to request the interconnection technique between inquiry first terminal and second terminal indirectly, interconnection technique is non-3 gpp technology or 3GPP technology, and first terminal is established by second terminal and base station and communicated to connect.The description of 3GPP technology or 3GPP technology is referred to above, therefore not to repeat here.

It illustratively, can also include: that base station determines that first terminal passes through second terminal and base station is established and communicated to connect before step 404.Such as, in step 402, the information of the first terminal about transmission terminal contexts request message to mobile management entity stored in base station is inquired after mobile management entity reception terminal contexts request message in base station, determines that the first terminal passes through second terminal and communication connection is established in base station.In another example, in step 402, base station inquires the information of the stored second terminal about transmission terminal contexts request message to mobile management entity in base station, determines and hang with first terminal under the second terminal after mobile management entity reception terminal contexts modification request message.

Step 405, base station receives indirect access technology inquiry request from first terminal and responds (Indirect Access Tech Response) message, and indirect access technology inquiry request response message carries indirect access technology and indicates information.

It should be noted that access technology inquiry request response message is used for signals base indirectly: first terminal has received indirect access technology inquiry request information and has completed indirect access technology inquiry.Indirect access technology instruction message is used to indicate the interconnection technique between first terminal and second terminal.

Step 406, base station determines that the interconnection technique between indirect access technology instruction information instruction first terminal and second terminal is non-3 gpp technology, and sends RRC connection reconfiguration to first terminal and set message.

Description in above-described embodiment to step 204 may refer to the specific descriptions of step 406, therefore not to repeat here.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, after first terminal sends CSFB instruction information to base station by mobile management entity, base station sends indirect access technology inquiry request message to first terminal, and receives indirect access technology from first terminal and indicate information.When base station indicates that information determines that first terminal is connect with second terminal using non-3 gpp technology by indirect access technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.

Fig. 5 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention.As shown in figure 5, the embodiment may include:

Step 501, first terminal sends expansion service to mobile management entity and requests ESR message, and CSFB instruction information is carried in ESR message and indirect access technology indicates information.

Step 502, base station receives terminal contexts from mobile management entity and modifies request message, and terminal contexts modification request message includes CSFB instruction information and indirect access technology instruction information.

Optionally, step 503, base station receives the measurement report of 2G or 3G cell from first terminal, and determines Target cell according to measurement report.Wherein, Target cell is the cell that first terminal needs to access during circuit domain dropping.

It should be noted that introducing the description referred in above-described embodiment to step 201, step 202 and step 203 to the specific of step 501, step 502 and step 503, therefore not to repeat here.

Step 504, base station determines that the interconnection technique between indirect access technology instruction information instruction first terminal and second terminal is 3GPP technology, and sends RRC connection to first terminal and hang up (connection Suspend) message.

It should be noted that the context that RRC connection message on hold is used to that first terminal to be requested to retain RRC connection.Base station carries the access information of Target cell into the RRC connection message on hold that first terminal is sent.For example, the access information of Target cell may come from step 503, base station is according to the access information from the determining Target cell of the received measurement report of first terminal.In another example base station does not receive the measurement report of 2G or 3G cell from first terminal, that is, it is not carried out step 503, and has been stored with the access information of Target cell in base station.

Illustratively, step 504 can also be that base station determines that the interconnection technique between first terminal and second terminal is 3GPP technology, and send RRC connection message on hold to first terminal by the contextual information of first terminal.

Illustratively, in step 504, base station sends RRC connection message on hold to first terminal, can be with are as follows: RRC connection message on hold is sent to first terminal to second terminal transmission RRC connection message on hold, second terminal by base station.

Illustratively, after step 504, can also to include: base station, which send terminal contexts modification request response to mobile management entity, connect hang-up completion message with RRC.Terminal contexts modification request response is for informing mobile management entity: base station has received terminal contexts modification solicited message and will have been continued with according to solicited message.RRC connection, which is hung up, completes message for informing mobile management entity: RRC connection hang-up is completed in base station, i.e., retains RRC with first terminal equipment in base station and connect context.

It should be noted that (suspend) state of hang-up refers to: base station side remains the contextual information that RRC is connected with first terminal side respectively, but the RRC cannot be used to connect.When first terminal is in suspended state, the RRC connection of (resume) between message recovery and base station directly can be restored by one, shorten the time delay that user face is established, to make communication network of the first terminal before it can be quickly returning to after terminating CS voice, such as LTE network.

It illustratively, after step 504, can also include: the inactive timer expiry of second terminal, base station does not discharge the RRC connection of the second terminal.Under normal conditions, base station is after determining that second terminal does not carry out data receiver and transmission business, in order to save the electric quantity consumption of channel resource and terminal, it will start inactive timer, after the time that inactive timer record second terminal does not carry out data transmit-receive business reaching pre- specified time, base station enters Idle state for second terminal is discharged.When second terminal enters connected state from Idle state, need to re-establish RRC connection by the related signaling of RRC connection.In the embodiment of the present invention, when base station determines that second terminal does not carry out data receiver and sends business, base station does not start inactive timer, second terminal cannot propagate into Idle state, to make first terminal that can quickly access second terminal after terminating CS voice service to carry out PS business, time and signaling consumption that terminal enters connected state from Idle state are saved.

Step 505, mobile management entity sends release access bearer to gateway (Serving GateWay, SGW) and requests (Release Access Bearer Request) message.

It should be noted that release access bearer request message is for requesting gateway to discharge the access bearer between the gateway and base station.

Illustratively, after step 505, it can also include: mobile management entity from SGW reception release access bearer request response (Release Access Bearer Response) message, the message is for informing mobile management entity: SGW has discharged the access bearer between base station.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, first terminal sends CSFB to base station by mobile management entity and indicates that information and indirect access technology indicate information, when base station indicates that information determines that first terminal is connect with second terminal using 3GPP technology by indirect access technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Fig. 6 is another circuit domain fallback method communication scheme provided in an embodiment of the present invention.As shown in fig. 6, the embodiment may include:

Step 601, first terminal sends ESR message to mobile management entity, carries CSFB in ESR message and indicates information.

Step 602, base station receives terminal contexts from mobile management entity and modifies request message, and terminal contexts modification request message includes CSFB instruction information.

Optionally, step 603, base station receives the information at least one cell that can access during circuit domain dropping from first terminal, and base station determines the cell for needing to access according to the information of at least one accessible cell.

Step 604, base station sends indirect access technology inquiry request message to first terminal.

Step 605, base station receives indirect access technology inquiry request response message from first terminal, and indirect access technology inquiry request response message carries indirect access technology and indicates information.

It should be noted that introducing the description referred in above-described embodiment to step 401-405 to the specific of step 601-605, therefore not to repeat here.

Step 606, base station determines that the interconnection technique between indirect access technology instruction information instruction first terminal and second terminal is 3GPP technology, and sends RRC connection message on hold to first terminal.

Step 607, mobile management entity sends release access bearer request message to SGW.

It should be noted that referring to the description in above-described embodiment to step 504 and 505 to the specific introduction of step 606 and 607, therefore not to repeat here.

A kind of method of circuit domain dropping provided in an embodiment of the present invention, after first terminal sends CSFB instruction information to base station by mobile management entity, base station sends indirect access technology inquiry request message to first terminal, and receives indirect access technology from first terminal and indicate information.When base station indicates that information determines that first terminal is connect with second terminal using 3GPP technology by indirect access technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Above in conjunction with Fig. 1 to Fig. 6, base station, mobile management entity and terminal according to embodiments of the present invention is described in detail below according to Fig. 7 in the method that circuit domain dropping according to an embodiment of the present invention is described in detail.

Fig. 7 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention.The base station 700 may include sending module 701, receiving module 702 and processing module 703.

It is designed it will be understood by those skilled in the art that Fig. 7 illustrate only simplifying for the structure of base station.Architecture of base station shown in Fig. 7 does not constitute the restriction to base station, the base station may include than illustrating 7 more or fewer components, such as, the base station can also include the memory module instructed accordingly for storing the communication of algorithms, furthermore, in order to save chip area, receiving module 702 and sending module 701 can also be integrated, and form transceiver.

As shown in fig. 7, receiving module 702 is used to receive the first message of mobile management entity transmission, first message is used to indicate base station first terminal and needs circuit domain dropping.Processing module 703 is used to determine the interconnection technique between first terminal and second terminal.Sending module 701 is used to send second message to first terminal according to interconnection technique, and second message is used to indicate the mode of first termination circuit domain dropping.

Illustratively, processing module 703 is also used to: the interconnection technique between first terminal and second terminal is determined according to the contextual information of first terminal；Alternatively, determining the interconnection technique between first terminal and second terminal according to the first instruction information after the first instruction information that receiving module 702 receives that mobile management entity is sent；Alternatively, determining the interconnection technique between first terminal and second terminal according to second indication information after the second indication information that receiving module 702 receives that first terminal is sent.

Illustratively, sending module 701 is also used to: after processing module 703 determines interconnection technique for non-3GPP technology, second message is sent to first terminal according to interconnection technique, second message instruction first terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, sending second message to first terminal according to interconnection technique, second message instruction first terminal hangs up the RRC connection between base station in circuit domain dropping after processing module 703 determines interconnection technique for 3GPP technology.

Illustratively, processing module 703 is also used to after determining that interconnection technique is non-3GPP technology, if the inactive timer expiry of second terminal, does not discharge the RRC connection of second terminal.

Base station provided in an embodiment of the present invention indicates information according to from the received indirect access technology of first terminal or mobile management entity, determines the interconnection technique between first terminal and second terminal.When base station determines that interconnection technique is non-3 gpp technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.When base station determines that interconnection technique is 3GPP technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Fig. 8 is a kind of structural schematic diagram of mobile management entity provided in an embodiment of the present invention.The mobile management entity 800 may include sending module 801, receiving module 802.

It is designed it will be understood by those skilled in the art that Fig. 8 illustrate only simplifying for the structure of mobile management entity.Mobile management entity structure shown in Fig. 8 does not constitute the restriction to mobile management entity, which may include than figure Show 8 more or fewer components, for example, the mobile management entity can also include the memory module instructed accordingly for storing the communication of algorithms.In another example can also include processing module 803, be operated for handling according to the instruction in memory module.In addition, receiving module 802 and sending module 801 can also integrate in order to save chip area, transceiver is formed.

As shown in figure 8, receiving module 802 is used to receive the first message of first terminal transmission, first message is used to indicate first terminal and needs circuit domain dropping.Sending module 801 is used to send second message to base station, and second message is used to indicate base station first terminal and needs circuit domain dropping.

Illustratively, first message includes the interconnection technique between first terminal and second terminal.

Illustratively, second message includes the interconnection technique between first terminal and second terminal.

Mobile management entity provided in an embodiment of the present invention indicates that information and indirect access technology indicate information by receiving CSFB from first terminal, and sends CSFB to base station and indicate that information and indirect access technology indicate information.Base station is set to indicate that information judges the interconnection technique between first terminal and second terminal according to indirect access technology.When base station determines that interconnection technique is non-3 gpp technology, base station will not discharge it and connect with the RRC of first terminal, but RRC connection reconfiguration is sent to first terminal and sets message, enable first terminal while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.When base station determines that interconnection technique is 3GPP technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Fig. 9 is a kind of structural schematic diagram of terminal provided in an embodiment of the present invention.The terminal 900 may include sending module 901, receiving module 902 and processing module 903.

It is designed it will be understood by those skilled in the art that Fig. 9 illustrate only simplifying for the structure of terminal.The restriction of the not structure paired terminal of terminal structure shown in Fig. 9, the terminal may include than illustrating 9 more or fewer components, such as, the terminal can also include the memory module instructed accordingly for storing the communication of algorithms, furthermore, in order to save chip area, receiving module 902 and sending module 901 can also be integrated, and form transceiver.

As shown in figure 9, sending module 901 is used to send first message to mobile management entity, first message is used to indicate first terminal and needs circuit domain dropping.Receiving module 902 is used to receive the second message of base station transmission, and second message is used to indicate the mode of first termination circuit domain dropping.Processing module 903 is used to carry out circuit domain dropping according to second message.

Illustratively, processing module 903 is also used to retain in circuit domain dropping the radio resource control RRC connection between base station；Alternatively, hanging up the RRC connection between base station in circuit domain dropping.

A kind of terminal provided in an embodiment of the present invention indicates information by sending indirect access technology to base station, enables base station according to indicating that the information determines the interconnection technique between the terminal and second terminal.When base station determines that interconnection technique is non-3 gpp technology, base station will not discharge it and connect with the RRC of the terminal, but RRC connection reconfiguration is sent to the terminal and sets message, it allows the terminal to while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.When base station determines that interconnection technique is 3GPP technology, base station sends RRC connection message on hold to the terminal, allows the terminal to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal is according to RRC Connection message on hold remains RRC contextual information, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before which can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Figure 10 is the structural schematic diagram of another base station provided in an embodiment of the present invention.As shown in Figure 10, which includes: the components such as memory 1001, processor 1002 and communication interface 1003.Memory 1001 can be used for storing the program code and data of base station.Processor 1002 can be central processing unit (Central Processing Unit, CPU), general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application-Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) either other programmable logic device, transistor logic, hardware component or any combination thereof.It, which may be implemented or executes, combines various illustrative logic blocks, module and circuit described in the disclosure of invention.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors, DSP and the combination of microprocessor etc..Communication interface is to be referred to as, and may include one or more interfaces.It will be understood by those skilled in the art that the architecture of base station shown in Figure 10 does not constitute the restriction to base station, it may include perhaps combining certain components or different component layouts than illustrating more or fewer components.For example, the base station can also include bus 1004.Wherein, communication interface 1003, processor 1002 and memory 1001 can be connected with each other by bus 1004；Bus 1004 can be Peripheral Component Interconnect standard (Peripheral Component Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (Extended Industry Standard Architecture, abbreviation EISA) bus etc..The bus 1004 can be divided into address bus, data/address bus, control bus etc..Only to be indicated with a thick line in Figure 10, it is not intended that an only bus or a type of bus convenient for indicating.

As shown in Figure 10, memory 1001, for storing program instruction.Processor 1002, for executing following operation according to the program instruction stored in memory 1001: instruction communication interface 1003 receives the first message that mobile management entity is sent, and first message is used to indicate base station first terminal and needs circuit domain dropping；Determine that the interconnection technique between first terminal and second terminal, instruction communication interface 1003 send second message to first terminal according to interconnection technique, second message is used to indicate the mode of first termination circuit domain dropping.

Illustratively, processor 1002 is also used to execute following operation according to the program instruction stored in memory 1001: the interconnection technique between first terminal and second terminal is determined according to the contextual information of first terminal；Alternatively, instruction communication interface 1003 receives the first instruction information that mobile management entity is sent, and the interconnection technique between first terminal and second terminal is determined according to the first instruction information；Alternatively, instruction communication interface 1003 receives the second indication information that first terminal is sent, and the interconnection technique between first terminal and second terminal is determined according to second indication information.

Illustratively, processor 1002 is also used to execute following operation according to the program instruction stored in memory 1001: determining that interconnection technique is non-3GPP technology, and indicating that communication interface 1003 sends second message to first terminal according to interconnection technique, second message instruction first terminal retains the connection of the radio resource control RRC between base station in circuit domain dropping；Alternatively, determining that interconnection technique is 3GPP technology, and indicate that communication interface 1003 sends second message to first terminal according to interconnection technique, second message instruction first terminal hangs up the RRC connection between base station in circuit domain dropping.

Illustratively, processor 1002 are also used to execute following operation according to the program instruction stored in memory 1001: determining that interconnection technique does not discharge the RRC connection of second terminal if the inactive timer expiry of second terminal for non-3GPP technology.

Figure 11 is the structural schematic diagram of another mobile management entity provided in an embodiment of the present invention.As shown in figure 11, which includes: the components such as memory 1101, processor 1102 and communication interface 1103.Memory 1101 can be used for storing the program code and data of mobile management entity.Processor 1102 can be central processing unit (Central Processing Unit, CPU), general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit (Application-Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) either other programmable logic device, transistor logic, hardware component or any combination thereof.It, which may be implemented or executes, combines various illustrative logic blocks, module and circuit described in the disclosure of invention.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors, DSP and the combination of microprocessor etc..Communication interface is to be referred to as, and may include one or more interfaces.It will be understood by those skilled in the art that the mobile management entity structure shown in Figure 11 does not constitute the restriction to mobile management entity, it may include perhaps combining certain components or different component layouts than illustrating more or fewer components.For example, the mobile management entity can also include bus 1104.Wherein, communication interface 1103, processor 1102 and memory 1101 can be connected with each other by bus 1104；Bus 1104 can be Peripheral Component Interconnect standard (Peripheral Component Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (Extended Industry Standard Architecture, abbreviation EISA) bus etc..The bus 1104 can be divided into address bus, data/address bus, control bus etc..Only to be indicated with a thick line in Figure 11, it is not intended that an only bus or a type of bus convenient for indicating.

As shown in figure 11, memory 1101, for storing program instruction.Processor 1102, for executing following operation according to the program instruction stored in memory 1101: instruction communication interface 1103 receives the first message that first terminal is sent, and first message is used to indicate first terminal and needs circuit domain dropping；And instruction communication interface 1103 receives to base station and sends second message, second message is used to indicate base station first terminal and needs circuit domain dropping.

Mobile management entity provided in an embodiment of the present invention indicates that information and indirect access technology indicate information by receiving CSFB from first terminal, and sends CSFB to base station and indicate that information and indirect access technology indicate information.Base station is set to indicate that information judges the interconnection technique between first terminal and second terminal according to indirect access technology.When base station determines that interconnection technique is non-3 gpp technology, base station will not discharge it and connect with the RRC of first terminal, but sends RRC connection reconfiguration to first terminal and set message, enable first terminal in the letter according to 2G the or 3G cell for including in the message While breath falls back to circuit domain to carry out CS business, PS business can also be carried out by the connection with second terminal.When base station determines that interconnection technique is 3GPP technology, base station sends RRC connection message on hold to first terminal, and first terminal is enable to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before first terminal can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

Figure 12 is the structural schematic diagram of another terminal provided in an embodiment of the present invention.As shown in figure 12, the terminal 1200 includes: radio frequency (Radio Frequency, RF) the components such as circuit 1210, memory 1220, input unit 1230, display unit 1240, processor 1250, WLAN (Wireless Local Area Networks, WLAN) module 1260, power supply 1270 and bluetooth module 1280.It will be understood by those skilled in the art that the restriction of terminal structure shown in Figure 12 not structure paired terminal, may include perhaps combining certain components or different component layouts than illustrating more or fewer components.

RF circuit 1210 can be used for receiving and sending messages, for example, connection mobile broadband.In general, RF circuit 1210 includes but is not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise Amplifier, LNA), duplexer etc..In addition, mobile band width service can also be forwarded to WLAN module 1260 by RF circuit 1210, mobile band width service is transmitted to other terminals by WLAN module 1260.Wherein, wireless communication can use any communication standard or agreement, including but not limited to global system for mobile communications (Global System of Mobile communication, GSM), general packet radio service (General Packet Radio Service, GPRS), CDMA (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), long term evolution (Long Term Evolution, LTE), Email, short message clothes Be engaged in (Short Messaging Service, SMS) etc..

Memory 1220 can be used for storing program instruction, and processor 1250 is stored in the program instruction of memory 1220 by operation, so that the terminal executes the above-mentioned method such as Fig. 2, Fig. 4, Fig. 5 or circuit domain dropping shown in fig. 6.Memory 1220 can mainly include storing program area and storage data area, wherein storing program area can storage program area and application program etc. needed for realizing the method for foregoing circuit domain dropping.The data etc. that storage data area can store the list information of terminal and the terminal is generated when executing the method for foregoing circuit domain dropping.In addition, memory 1220 may include volatile memory (volatile memory), such as random access memory (random-access memory, RAM)；The memory 1220 also may include nonvolatile memory (non-volatile memory), such as read-only memory (read-only memory, ROM), flash memory (flash memory), hard disk (hard disk drive,) or solid state hard disk (solid-state drive, SSD) HDD.The memory 1220 can also include the combination of the memory of mentioned kind.

Input unit 1230 can be used for receiving the number or character information of user's input, including opening WLAN hot spot instruction, the instruction of terminal for selecting shared WLAN hot spot etc..Specifically, input unit 1230 may include touch panel 1231 and other input equipments 1232.Touch panel 1231, also referred to as touch screen, the touch operation (for example user uses the operations of any suitable object or attachment on touch panel 1231 or near touch panel 1231 such as finger, stylus) of collectable user on it or nearby, and corresponding attachment device is driven according to preset formula.Optionally, touch panel 1231 may include both touch detecting apparatus and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected, transmit a signal to touch controller；Touch controller is received from touch detecting apparatus Touch information, and be converted into contact coordinate, then give processor 1250, and order that processor 1250 is sent can be received and executed.In addition, input unit 1230 can realize touch panel 1231 using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch panel 1231, input unit 1230 can also include other input equipments 1232.Specifically, other input equipments 1232 can include but is not limited to one of physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc. or a variety of.

Display unit 1240 can be used for showing information input by user or be supplied to the information of user and the various menus of terminal.Display unit 1240 may include display screen 1241, optionally, display screen 1241 can be configured using the forms such as liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED).Further, touch panel 1231 can cover display screen 1241, after touch panel 1231 detects touch operation on it or nearby, processor 1250 is sent to determine the type of touch event, device 1250 is followed by subsequent processing according to the type of touch event and corresponding visual output is provided on display screen 1241.Although in Figure 12, touch panel 1231 and display screen 1241 are the input and input function for realizing terminal as two independent components, but it is in some embodiments it is possible to touch panel 1231 and display screen 1241 is integrated and that realizes terminal output and input function.

Processor 1250 is the control centre of terminal, utilize the various pieces of various interfaces and the entire terminal of connection, by running or executing the software program and/or module that are stored in memory 1220, and the data being stored in memory 1220 are called, execute the method such as Fig. 2, Fig. 4, Fig. 5 or circuit domain dropping shown in fig. 6.Optionally, processor 1250 may include one or more processing units.Preferably, processor 1250 can integrate application processor and modem processor, wherein the main processing operation system of application processor, user interface and application program etc., modem processor mainly handles wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 1250.

WLAN module 1260 can be used for that user is helped to send and receive e-mail, browse webpage and access streaming video etc., it provides wireless broadband WLAN internet access for user.WLAN belongs to short range wireless transmission technology, and terminal can access WLAN hot spot by WLAN module 1260, can also open WLAN hot spot by WLAN module 1260, and mobile band width service is transmitted to other terminals.WLAN module 1260 can also carry out Wi-Fi broadcast and scanning, to realize the wireless communication with other terminals of surrounding.

Terminal further includes the power supply 1270 (such as battery) powered to all parts, optionally, power supply can be logically contiguous by power-supply management system and processor 1250, to realize the functions such as management charging, electric discharge and power consumption by power-supply management system.

Bluetooth module 1270 can be low-power consumption bluetooth (Bluetooth Low Energy, BLE) equipment, be also possible to conventional Bluetooth equipment, be also possible to support the bimodulus bluetooth equipment of conventional Bluetooth and BLE.Bluetooth module 1270 and the bluetooth module of other terminals establish BLE or classical bluetooth connection, and bluetooth module 1270 can also carry out BR or BLE broadcast and scanning, to realize the wireless communication with other terminals of surrounding.

Although being not shown, terminal can also include camera, loudspeaker etc., and details are not described herein.

Illustratively, RF circuit 1210, bluetooth module 1280 and WLAN module 1260 can be referred to as communication interface.

Illustratively, which includes processor 1250, memory 1220 and communication interface.Memory 1220 is for storing program instruction.Processor 1250 is used to execute following operation according to the program instruction stored in memory 1220: instruction communication interface sends first message to mobile management entity, and first message is used to indicate first terminal and needs circuit domain dropping.And indicating that communication interface receives the second message that base station is sent, second message is used to indicate the mode of first termination circuit domain dropping；And circuit domain dropping is carried out according to second message.

Illustratively, processor 1250 is also used to execute following operation according to the program instruction stored in memory 1220: retaining the radio resource control RRC connection between base station in circuit domain dropping；Alternatively, hanging up the RRC connection between base station in circuit domain dropping.

A kind of terminal provided in an embodiment of the present invention indicates information by sending indirect access technology to base station, enables base station according to indicating that the information determines the interconnection technique between the terminal and second terminal.When base station determines that interconnection technique is non-3 gpp technology, base station will not discharge it and connect with the RRC of the terminal, but RRC connection reconfiguration is sent to the terminal and sets message, it allows the terminal to while falling back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business, PS business can also be carried out by the connection with second terminal.When base station determines that interconnection technique is 3GPP technology, base station sends RRC connection message on hold to the terminal, allows the terminal to fall back to circuit domain according to the information for the 2G or 3G cell for including in the message to carry out CS business.Meanwhile second terminal remains RRC contextual information according to RRC connection message on hold, so as to directly restore the RRC connection of (resume) between message recovery and base station by one, shortens the time delay that user face is established.Therefore, the communication network before which can be quickly returning to after terminating CS business, such as LTE network, to carry out PS business.

The step of method described in conjunction with the examples disclosed in this document or algorithm, can be implemented with the combination of hardware, the software module or the two of processor execution.Software module can be placed in any other form of storage medium known in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

Above-described specific embodiment; the purpose of the present invention, technical scheme and beneficial effects are had been further described; it should be understood that; the foregoing is merely a specific embodiment of the invention; it is not intended to limit the scope of protection of the present invention; all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done, should all be included in the protection scope of the present invention.

Claims

A kind of method of circuit domain dropping, which is characterized in that the described method includes:

Base station receives the first message that mobile management entity is sent, and the first message is used to indicate the base station first terminal and needs circuit domain dropping；

The base station determines the interconnection technique between the first terminal and second terminal, and the base station sends second message to the first terminal according to the interconnection technique, and the second message is used to indicate the mode of the first termination circuit domain dropping.
The method according to claim 1, wherein the base station determines the interconnection technique between the first terminal and second terminal, comprising:

The base station determines the interconnection technique between the first terminal and the second terminal according to the contextual information of the first terminal；Or

The base station receives the first instruction information that the mobile management entity is sent, and the base station determines the interconnection technique between the first terminal and the second terminal according to the first instruction information；Or

The base station receives the second indication information that the first terminal is sent, and the base station determines the interconnection technique between the first terminal and the second terminal according to the second indication information.
The method according to claim 1, wherein the base station sends second message to the first terminal according to the interconnection technique, the second message is used to indicate the mode of the first termination circuit domain dropping, comprising:

If the interconnection technique is non-third generation partner program non-3GPP technology, the second message indicates that the first terminal retains the radio resource control RRC connection between the base station in circuit domain dropping；Or

If the interconnection technique is third generation partner program 3GPP technology, the second message indicates that the first terminal hangs up the radio resource control RRC connection between the base station in circuit domain dropping.
The method according to requiring 3, which is characterized in that if the interconnection technique is non-3GPP technology, the method also includes:

If the inactive timer expiry of the second terminal, the base station does not discharge the RRC connection of the second terminal.
A kind of method of circuit domain dropping, which is characterized in that the described method includes:

Mobile management entity receives the first message that first terminal is sent, and the first message is used to indicate the first terminal and needs circuit domain dropping；

The mobile management entity sends second message to base station, and the second message is used to indicate first terminal described in the base station and needs circuit domain dropping.
According to the method described in claim 5, it is characterized in that, the first message includes the interconnection technique between the first terminal and second terminal.
According to the method described in claim 5, it is characterized in that, the second message includes the interconnection technique between the first terminal and second terminal.
A kind of method of circuit domain dropping, which is characterized in that the described method includes:

First terminal sends first message to mobile management entity, and the first message is used to indicate the first terminal and needs Want circuit domain dropping；

The first terminal receives the second message that base station is sent, and the second message is used to indicate the mode of the first termination circuit domain dropping, and the first terminal carries out circuit domain dropping according to the second message.
According to the method described in claim 8, it is characterized in that, the first message includes the interconnection technique between the first terminal and second terminal.
According to the method described in claim 8, it is characterized in that, the first terminal carries out circuit domain dropping according to the second message, comprising:

The first terminal retains the connection of the radio resource control RRC between the base station in circuit domain dropping；

Alternatively, the first terminal hangs up the RRC connection between the base station in circuit domain dropping.
A kind of base station, which is characterized in that the base station includes:

Receiving module, for receiving the first message of mobile management entity transmission, the first message is used to indicate the base station first terminal and needs circuit domain dropping；

Processing module, for determining the interconnection technique between the first terminal and second terminal；

Sending module, for sending second message to the first terminal according to the interconnection technique, the second message is used to indicate the mode of the first termination circuit domain dropping.
Base station according to claim 11, which is characterized in that the processing module is also used to:

The interconnection technique between the first terminal and the second terminal is determined according to the contextual information of the first terminal；Or

After the first instruction information that the receiving module receives that the mobile management entity is sent, the interconnection technique between the first terminal and the second terminal is determined according to the first instruction information；Or

After the second indication information that the receiving module receives that the first terminal is sent, the interconnection technique between the first terminal and the second terminal is determined according to the second indication information.
Base station according to claim 11, which is characterized in that the sending module is also used to:

After the processing module determines the interconnection technique for non-third generation partner program non-3GPP technology, second message is sent to the first terminal according to the interconnection technique, the second message indicates that the first terminal retains the radio resource control RRC connection between the base station in circuit domain dropping；Or

After the processing module determines the interconnection technique for third generation partner program 3GPP technology, second message is sent to the first terminal according to the interconnection technique, the second message indicates that the first terminal hangs up the RRC connection between the base station in circuit domain dropping.
Base station according to claim 13, it is characterized in that, the processing module, is also used to after determining that the interconnection technique is non-3GPP technology, if the inactive timer expiry of the second terminal, the radio resource control RRC connection of the second terminal is not discharged.
A kind of mobile management entity, which is characterized in that the mobile management entity includes:

Receiving module, for receiving the first message of first terminal transmission, the first message is used to indicate the first terminal and needs circuit domain dropping；

Sending module, for sending second message to base station, the second message is used to indicate first terminal described in the base station and needs circuit domain dropping.
Mobile management entity according to claim 15, which is characterized in that the first message includes the interconnection technique between the first terminal and second terminal.
Mobile management entity according to claim 15, which is characterized in that the second message includes the interconnection technique between the first terminal and second terminal.
A kind of terminal, which is characterized in that the terminal includes:

Sending module, for sending first message to mobile management entity, the first message is used to indicate the first terminal and needs circuit domain dropping；

Receiving module, for receiving the second message of base station transmission, the second message is used to indicate the mode of the first termination circuit domain dropping；

Processing module, for carrying out circuit domain dropping according to the second message.
Terminal according to claim 18, which is characterized in that the first message includes the interconnection technique between the first terminal and second terminal.
Terminal according to claim 18, which is characterized in that the processing module is also used to:

Retain the radio resource control RRC connection between the base station in circuit domain dropping；Or

The RRC connection between the base station is hung up in circuit domain dropping.
A kind of base station, which is characterized in that the base station includes: processor, memory and communication interface；

The memory, for storing program instruction；

The processor, for executing following operation according to the program instruction stored in the memory:

Indicate that the communication interface receives the first message that mobile management entity is sent, the first message is used to indicate the base station first terminal and needs circuit domain dropping；It determines the interconnection technique between the first terminal and second terminal, indicates that the communication interface sends second message to the first terminal according to the interconnection technique, the second message is used to indicate the mode of the first termination circuit domain dropping.
Base station according to claim 21, which is characterized in that the processor is also used to execute following operation according to the program instruction stored in the memory:

The interconnection technique between the first terminal and the second terminal is determined according to the contextual information of the first terminal；Or

It indicates that the communication interface receives the first instruction information that the mobile management entity is sent, and the interconnection technique between the first terminal and the second terminal is determined according to the first instruction information；Or

It indicates that the communication interface receives the second indication information that the first terminal is sent, and the interconnection technique between the first terminal and the second terminal is determined according to the second indication information.
Base station according to claim 21, which is characterized in that the processor is also used to execute following operation according to the program instruction stored in the memory:

Determine that the interconnection technique is non-third generation partner program non-3GPP technology, and indicating that the communication interface sends second message to the first terminal according to the interconnection technique, the second message indicates that the first terminal retains the radio resource control RRC connection between the base station in circuit domain dropping；Or

It determines that the interconnection technique is third generation partner program 3GPP technology, and indicates that the communication interface sends second message to the first terminal according to the interconnection technique, the second message indicates the first terminal in circuit domain The RRC connection between the base station is hung up when falling.
Base station according to claim 23, which is characterized in that the processor is also used to execute following operation according to the program instruction stored in the memory:

Determine that the interconnection technique does not discharge the RRC connection of the second terminal if the inactive timer expiry of the second terminal for non-3GPP technology.
A kind of mobile management entity, which is characterized in that the mobile management entity includes: processor, memory and communication interface；

The memory, for storing program instruction；

The processor, for executing following operation according to the program instruction stored in the memory:

Indicate that the communication interface receives the first message that first terminal is sent, the first message is used to indicate the first terminal and needs circuit domain dropping；And the instruction communication interface receives to base station and sends second message, the second message is used to indicate first terminal described in the base station and needs circuit domain dropping.
Mobile management entity according to claim 25, which is characterized in that the first message includes the interconnection technique between the first terminal and second terminal.
Mobile management entity according to claim 25, which is characterized in that the second message includes the interconnection technique between the first terminal and second terminal.
A kind of terminal, which is characterized in that the terminal includes: processor, memory and communication interface；

The memory, for storing program instruction；

The processor, for executing following operation according to the program instruction stored in the memory:

Indicate that the communication interface sends first message to mobile management entity, the first message is used to indicate the first terminal and needs circuit domain dropping；And indicating that the communication interface receives the second message that base station is sent, the second message is used to indicate the mode of the first termination circuit domain dropping；And circuit domain dropping is carried out according to the second message.
Terminal according to claim 28, which is characterized in that the first message includes the interconnection technique between the first terminal and second terminal.
Terminal according to claim 28, which is characterized in that the processor is also used to execute following operation according to the program instruction stored in the memory:

Retain the radio resource control RRC connection between the base station in circuit domain dropping；Or

The RRC connection between the base station is hung up in circuit domain dropping.