CN103609168A - Access method for circuit switched fallback (CSFB), mobility management entity and mobile switch center - Google Patents
Access method for circuit switched fallback (CSFB), mobility management entity and mobile switch center Download PDFInfo
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- CN103609168A CN103609168A CN201380000616.2A CN201380000616A CN103609168A CN 103609168 A CN103609168 A CN 103609168A CN 201380000616 A CN201380000616 A CN 201380000616A CN 103609168 A CN103609168 A CN 103609168A
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Abstract
The invention provides an access method for circuit switched fallback (CSFB), a mobility management entity and a mobile switch center. The method comprise the steps that the mobile switch center receives service request information sent by the mobility management entity, the service request information being used for instructing the mobile switch center to determine whether to accept or reject a CSFB call request of user equipment and being sent by the mobility management entity after the CSFB call request sent by the user equipment is received; the mobile switch center determines whether to accept or reject the CSFB call request of the user equipment to obtain a judgment result; the mobile switch center sends service response information to the mobility management entity according to the judgment result, so that the mobility management entity can send notification message to the user equipment according to the service response information. The method provided by embodiments of the invention solves the technical problems of large overhead of a system in a process that a terminal a CS service is initiated after a terminal falls back to a 2G or 3G network from an LTE network in the prior art.
Description
Technical field
The present invention relates to communication technical field, relate in particular to cut-in method, mobile management entity and the mobile switching centre of a kind of circuit domain dropping CSFB.
Background technology
Development along with mobile communication technology, mobile network is from initial Generation Mobile Telecommunication System technology (Second Generation, hereinafter to be referred as 2G) network evolves to Long Term Evolution (the Long Term Evolution of current hot topic gradually, hereinafter to be referred as LTE) network, in order to make terminal, under access LTE network, can initiate the circuit switching such as voice service (Circuit Switching, hereinafter to be referred as CS) business and the paging that receives CS business, and can be to terminal ongoing packet switching (Packet Switching in LTE network, hereinafter to be referred as PS) business carries out correct processing, produced circuit domain dropping (Circuit Switched Fallback, hereinafter to be referred as CSFB) technology, the terminal covering at LTE is when processed voice business, terminal first falls back to CS network, under CS network, carry out speech business, with regard to having reached, reuse the existing CS network equipment and provide speech business for the user in LTE network like this.
In prior art, terminal under LTE network to mobile management entity (Mobility Management Entity, hereinafter to be referred as MME) while initiating speech business caller, normally LTE base station sends expansion service request (Extended Service Request) to MME, make MME know that terminal will carry out CS business, MME and then indicating terminal fall back to 2G/3G network, when terminal falls back to (the Mobile Switch Center of the backward mobile switching centre of 2G/3G, hereinafter to be referred as MSC) initiation access request, by MSC, according to user's priority and the system loading Determines of self, whether allow UE to initiate CS business.
But prior art terminal is initiated in the process of CS business after falling back to 2G/3G, often need to have the participation of LTE base station, base station controller etc. to process, therefore cause the load expense of system larger.
Summary of the invention
The embodiment of the present invention provides cut-in method, mobile management entity and the mobile switching centre of a kind of circuit domain dropping CSFB, solved terminal in prior art and from LTE network falls back to 2G or 3G network, initiated in the process of CS business, the large technical problem of system loading expense causing because of the participation of LTE base station, base station controller.
Embodiment of the present invention first aspect provides the cut-in method of a kind of circuit domain dropping CSFB, comprising:
Mobile switching centre receives the service request information that mobile management entity sends, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity;
The CSFB call request of described subscriber equipment is accepted or is refused in the judgement of described mobile switching centre, obtains judged result;
Described mobile switching centre sends service response message according to described judged result to described mobile management entity, so that described mobile management entity sends a notification message to described subscriber equipment according to described service response message.
In conjunction with first aspect, in the possible execution mode of the first of first aspect, the CSFB call request of subscriber equipment is accepted or is refused in the judgement of described mobile switching centre, comprising:
CSFB call request of described subscriber equipment is accepted or is refused at least one judgement in network, the self-ability of described mobile switching centre and the load of described mobile switching centre place network that described mobile switching centre asks to access according to described CSFB call request.
In conjunction with the possible execution mode of the first of first aspect or first aspect, in the possible execution mode of the second of first aspect, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
In conjunction with first aspect to any one in the possible execution mode of the second of first aspect, in the third possible execution mode of first aspect, described mobile switching centre, also comprises according to described judged result after described mobile management entity sends service response message:
Described mobile switching centre falls after rise and initiates number of times according to described judged result statistics CSFB.
In conjunction with the third possible execution mode of first aspect, in the 4th kind of possible execution mode of first aspect, described mobile switching centre, also comprises according to described judged result after described mobile management entity sends service response message:
Number of success is fallen after rise according to described judged result statistics CSFB in described mobile switching centre.
In conjunction with the 4th kind of possible execution mode of first aspect, in the 5th kind of possible execution mode of first aspect, described mobile switching centre also comprises after falling number of success after rise according to the oneself state statistics CSFB of described mobile switching centre:
Described mobile switching centre falls initiation number of times after rise according to described CSFB and described CSFB falls the CSFB falling success rate that number of success is determined described subscriber equipment after rise.
In conjunction with first aspect to any one in the 5th kind of possible execution mode of first aspect, in the 6th kind of possible execution mode of first aspect, before described mobile switching centre receives the service request information of mobile management entity transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
Embodiment of the present invention second aspect provides the cut-in method of a kind of circuit domain dropping CSFB, comprising:
Mobile management entity receives the circuit domain dropping CSFB call request that subscriber equipment sends;
Described mobile management entity sends service request information according to described CSFB call request ，Xiang mobile switching centre, and described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing described subscriber equipment;
Described mobile management entity receives the service response message that described mobile switching centre sends;
Described mobile management entity sends a notification message to described subscriber equipment according to described service response message, so that described subscriber equipment determines whether to initiate access request to described mobile switching centre according to described notification message.
In conjunction with second aspect, in the possible execution mode of the first of second aspect, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
In conjunction with the possible execution mode of the first of second aspect or second aspect, in the possible execution mode of the second of second aspect, before described mobile management entity receives the described CSFB call request of described subscriber equipment transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
The embodiment of the present invention third aspect provides a kind of mobile switching centre, comprising:
Receiver module, the service request information sending for receiving mobile management entity, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity;
Judge module, for judging the CSFB call request of accepting or refusing described subscriber equipment, obtains judged result;
Sending module, for sending service response message according to described judged result to described mobile management entity, so that described mobile management entity sends a notification message to described subscriber equipment according to described service response message.
In conjunction with the third aspect, in the possible execution mode of the first of the third aspect, described judge module accepts or refuses CSFB call request of described subscriber equipment specifically at least one judgement in network, the self-ability of described mobile switching centre and the load of described mobile switching centre place network asking according to described CSFB call request to access.
In conjunction with the possible execution mode of the first of the third aspect or the third aspect, in the possible execution mode of the second of the third aspect, when described service response message indicates described judge module judgement to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described judge module judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
In conjunction with the third aspect, to any one in the possible execution mode of the second of the third aspect, in the third possible execution mode of the third aspect, described mobile switching centre also comprises:
The first statistical module, for described sending module according to described judged result after described mobile management entity sends service response message, according to described judged result statistics CSFB, fall after rise and initiate number of times.
In conjunction with the third possible execution mode of the third aspect, in the 4th kind of possible execution mode of the third aspect, described mobile switching centre also comprises:
The second statistical module, for described sending module according to described judged result after described mobile management entity sends service response message, according to described judged result statistics CSFB, fall number of success after rise.
In conjunction with the 4th kind of possible execution mode of the third aspect, in the 5th kind of possible execution mode of the third aspect, described mobile switching centre also comprises:
Determination module, after adding up CSFB falling number of success according to described mobile switching centre oneself state at described the second statistical module, according to described CSFB falling initiation number of times and described CSFB, fall the CSFB falling success rate that number of success is determined described subscriber equipment after rise.
In conjunction with the third aspect to any one in the 5th kind of possible execution mode of the third aspect, in the 6th kind of possible execution mode of the third aspect, before described receiver module receives the service request information of mobile management entity transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
Embodiment of the present invention fourth aspect provides a kind of mobile management entity, comprising:
The first receiver module, the circuit domain dropping CSFB call request sending for receiving subscriber equipment;
The first sending module, for sending service request information according to described CSFB call request ，Xiang mobile switching centre, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing described subscriber equipment;
The second receiver module, the service response message sending for receiving described mobile switching centre;
The second sending module, for sending a notification message to described subscriber equipment according to described service response message, so that described subscriber equipment determines whether to initiate access request to described mobile switching centre according to described notification message.
In conjunction with fourth aspect, in the possible execution mode of the first of fourth aspect, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
In conjunction with the possible execution mode of the first of fourth aspect or fourth aspect, in the possible execution mode of the second of fourth aspect, before described the second receiver module receives the described CSFB call request of described subscriber equipment transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre judges whether to accept the CSFB call request of subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of the cut-in method embodiment mono-of circuit domain dropping CSFB provided by the invention;
Fig. 2 is the schematic flow sheet of the cut-in method embodiment bis-of circuit domain dropping CSFB provided by the invention;
Fig. 3 is the schematic flow sheet of the cut-in method embodiment tri-of circuit domain dropping CSFB provided by the invention;
Fig. 4 is the signaling process figure of the cut-in method embodiment tetra-of circuit domain dropping CSFB provided by the invention;
Fig. 5 is the structural representation of the embodiment of mobile switching centre mono-provided by the invention;
Fig. 6 is the structural representation of the embodiment of mobile switching centre bis-provided by the invention;
Fig. 7 is the structural representation of mobile management entity embodiment mono-provided by the invention;
Fig. 8 is the structural representation of the embodiment of mobile switching centre tri-provided by the invention;
Fig. 9 is the structural representation of mobile management entity embodiment bis-provided by the invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The techniques described herein may be used in various communication systems, current 2G for example, 3G communication system and next generation communication system, global system for mobile communications (GSM for example, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system and other this type of communication systems.
The terminal relating in the application, it is subscriber equipment, can be that wireless terminal can be also catv terminal, wireless terminal can be to point to the equipment that user provides voice and/or data connectivity, has the portable equipment of wireless connecting function or is connected to other treatment facilities of radio modem.Wireless terminal can be through wireless access network (for example, RAN, Radio Access Network) communicate with one or more core net, wireless terminal can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network exchange language and/or data.For example, Personal Communications Services (PCS, Personal Communication Service) phone, cordless telephone, Session Initiation Protocol phone, wireless local loop (WLL, Wireless Local Loop) stand, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal also can be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile radio station (Mobile Station), travelling carriage (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), subscriber equipment (User Device) or subscriber's installation (User Equipment).
The base station relating in the application (for example, access point) can refer in Access Network aloft on interface by the equipment of one or more sectors and wireless terminal communications.Base station can be used for the air frame of receiving and IP grouping mutually to change, and as the router between wireless terminal and the remainder of Access Network, wherein the remainder of Access Network can comprise Internet protocol (IP) network.Base station is the attribute management of tunable to air interface also.For example, base station can be the AP of WLAN (wireless local area network) WLAN, also can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be the evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, the application limit.
Fig. 1 is the schematic flow sheet of the cut-in method embodiment mono-of circuit domain dropping CSFB provided by the invention, and the executive agent of the method that the embodiment of the present invention relates to is MSC, and as shown in Figure 1, the method comprises:
S101:MSC receives the service request information of MME transmission, and this service request information is used to indicate this MSC and determines the CSFB call request of accepting or refusing subscriber equipment, and this service request information is sent after the CSFB call request that receives subscriber equipment transmission by MME.
Concrete, the service request information here itself can indicate the CSFB call request that allows MSC judgement accept or refuse subscriber equipment, and MSC receives service request information, can know the CSFB call request that oneself will start to judge whether to accept subscriber equipment.
The CSFB call request of above-mentioned subscriber equipment is accepted or is refused in S102:MSC judgement, obtains judged result.
Concrete, subscriber equipment is initiated CS calling service, to MME, send CSFB call request, MME is after receiving the CSFB call request of subscriber equipment transmission, by SGs interface, to MSC, send service request information (Service Request), this SGs interface is the interface communicating between MSC and MME, for the business such as mobile management, paging and sending and receiving short messages between CS network and Evolved Packet Core (Evolved Packet Core, hereinafter to be referred as EPC); MSC judges the CSFB call request of accepting still to refuse subscriber equipment after receiving this service request information, obtains judged result.
S103:MSC sends service response message according to above-mentioned judged result to MME, so that MME sends a notification message to subscriber equipment according to above-mentioned service response message.
Concrete, MSC sends service response message according to above-mentioned judged result to MME, MME is after receiving this service response message, by the parameter of carrying in the judgement title of service response message or this service response message, know judged result, and send a notification message to subscriber equipment, so that the notification message that subscriber equipment sends according to MME operates accordingly, avoiding subscriber equipment in the situation that not knowing mobile switching centre's judged result, to fall back to 2G/3G network Bing Xiang mobile switching centre initiates access request and is moved switching center and refuses this access request, thereby the problem of the overhead of the system causing.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre determines the CSFB call request that judges whether to accept subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system.
Above-mentioned embodiment illustrated in fig. 1 in, S102 can comprise: MSC according to CSFB call request ask at least one judgement in network, the self-ability of MSC and the load of MSC place network of access to be accepted or CSFB call request of refusal subscriber equipment; And when above-mentioned service response message instruct MS C accepts the CSFB call request of subscriber equipment, above-mentioned notification message equipment for indicating user is initiated access request to MSC; Or when above-mentioned service response message instruct MS C refuses the CSFB call request of subscriber equipment, above-mentioned notification message equipment for indicating user is not initiated access request to MSC.
It should be noted that in above-described embodiment 1, MSC is before receiving the service request information of MME transmission, what subscriber equipment accessed is Long Term Evolution LTE network, this subscriber equipment is the terminal under LTE network, when subscriber equipment carries out CS business, first connects with LTE base station, afterwards, LTE base station sends expansion service request (Extended Service Request) to MME now needs the CS business of carrying out so that MME is known this subscriber equipment, after MME receives expansion service request, to LTE base station, send a response message, indication LTE base station is by the Connection Release of setting up between subscriber equipment and LTE base station before, and equipment for indicating user sends CSFB call request to MME, in order to request, be linked into Generation Mobile Telecommunication System technology (Second Generation, hereinafter to be referred as 2G) network or 3G (Third Generation) Moblie technology (Third Generation, hereinafter to be referred as 3G) network, and then carry out CS business, wherein, above-mentioned CSFB call request is for user equipment requests access 2G network or 3G network.
In said process, MSC judges whether to accept the CSFB call request of subscriber equipment, in fact be also the process of carrying out flow control or resource reservation, the service that is differentiation can provide higher call completion rate and service quality for high-priority users or business, in the situation that MSC system loading is higher, often by being first user's service or more reserved Service Sources of high priority, therefore, MSC judges whether to accept this CSFB call request of subscriber equipment, according to this CSFB call request, to ask the network of access, at least one of these three kinds of information of load of the ability of MSC self and MSC place network judges, when system loading is higher, refusal falls the user's of some low priorities CSFB call request, accept the CSFB call request of high-priority users, guarantee the call completing rate of the customer service of some high priorities.
In said process, if being MSC, judged result accepts the CSFB call request of subscriber equipment, MME is known judged result according to the parameter of carrying in the title of service response message or this service response message, equipment for indicating user falls back to 2G network or the backward MSC of 3G network initiates access request, afterwards according to the normal calling procedure of finishing dealing with of prior art; If judged result is the CSFB call request of MSC refusal subscriber equipment, the MSC that judgment result is that MME is known according to the parameter of carrying in the title of service response message or this service response message does not accept the CSFB call request of subscriber equipment, MME indicating terminal does not fall back to 2G or 3G network, and then to MSC, do not send access request, exit the initiation of CS business, be the CSFB call request that MSC has refused subscriber equipment in advance, do not need as needed the participation of the base station controller in 3G network in prior art.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre judges whether to accept the CSFB call request of subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system, simultaneously MSC in advance and between MME, carry out the judgement of CSFB call request, has also saved the time that subscriber equipment under LTE network carries out CS business, has improved the efficiency of subscriber equipment CSFB call business.
Fig. 2 is the schematic flow sheet of the cut-in method embodiment bis-of circuit domain dropping CSFB provided by the invention, on the basis of above-described embodiment, after step S103, the method has also further comprised the implementation method that falls the accurate calculating of success rate after rise, comprises the steps:
S201:MSC falls after rise and initiates number of times according to above-mentioned judged result statistics CSFB.
Concrete, MSC according to judged result after MME sends service response message, also can fall after rise and initiate number of times according to this judged result statistics CSFB; If MSC accepts the CSFB call request of subscriber equipment, can add 1 upper once statistics on the basis that CSFB fall after rise to initiate number of times; If the CSFB call request of MSC refusal subscriber equipment, after sending service response, adding up MME CSFB falling initiation number of times, here number of times is initiated in the CSFB of statistics falling can not add 1 on the basis of upper once statistics, but continue to continue to use the last CSFB adding up, falls initiation number of times after rise.
On above-mentioned basis embodiment illustrated in fig. 2, after S201, the method has also further comprised the definite method that falls number of success after rise, comprises the steps:
S202:MSC falls number of success after rise according to above-mentioned judged result statistics CSFB.
CSFB falls number of success after rise can be added up according to following statistical, if the MSC that judgment result is that of S102 accepts the CSFB call request of subscriber equipment, and MSC receives the access request of subscriber equipment or receives attaching position register (Home Location Register from 2G network or 3G network, hereinafter to be referred as HLR) local (Cancel Location) message of cancellation, upper once statistics on the basis that CSFB falls number of success after rise, add 1; If the CSFB call request that judgment result is that MSC refusal subscriber equipment of S102, can not add 1 upper once statistics on the basis that CSFB falls number of success after rise, but continue to continue to use the last CSFB adding up, fall number of success after rise.
S203:MSC falls initiation number of times after rise according to above-mentioned CSFB and CSFB falls the CSFB falling success rate that number of success is determined subscriber equipment after rise.
Can utilize the CSFB that S202 obtains to fall the definite success rate that falls after rise of CSFB falling initiation number of times that number of success obtains divided by S201 after rise.
In the method that the embodiment of the present invention provides, by falling number of success and CSFB falling initiation number of times by MSC after rise according to service response message statistics CSFB, and then definite success rate that falls after rise, improved and fallen the accuracy that success rate is calculated after rise, also made system maintenance personnel more accurately according to falling success rate after rise, to judge whether normally operation of system.
Fig. 3 is the schematic flow sheet of the cut-in method embodiment tri-of circuit domain dropping CSFB provided by the invention, and the method that the embodiment of the present invention relates to is mobile management entity, and as shown in Figure 3, the method comprises:
S301:MME receives the CSFB call request that subscriber equipment sends.
S302:MME, according to CSFB call request, sends service request information to MSC, and this service request information is used to indicate MSC and determines the CSFB call request of accepting or refusing subscriber equipment.
Concrete, subscriber equipment is initiated CS calling service, to MME, send CSFB call request, MME is after receiving the CSFB call request of subscriber equipment transmission, by SGs interface, to MSC, send service request information (Service Request), this SGs interface is the interface communicating between MSC and MME, for the business such as mobile management, paging and sending and receiving short messages between CS network and EPC network, MSC is after receiving this service request information, judgement accepts still to refuse the CSFB call request of subscriber equipment, in fact be also the process of carrying out flow control or resource reservation, the service that is differentiation can provide higher call completion rate and service quality for high-priority users or business, in the situation that MSC system loading is higher, often by being first user's service or more reserved Service Sources of high priority, therefore, MSC judges whether to accept this CSFB call request of subscriber equipment, according to this CSFB call request, to ask the network of access, at least one of these three kinds of information of load of the ability of MSC self and MSC place network judges, when system loading is higher, refusal falls the user's of some low priorities CSFB call request, accept the CSFB call request of high-priority users, guarantee the call completing rate of the customer service of some high priorities.
S303:MME receives the service response message that MSC sends.
S304:MME sends a notification message to subscriber equipment according to service response message, so that subscriber equipment determines whether to initiate access request to MSC according to this notification message.
Concrete, MSC is after the CSFB call request to subscriber equipment judges, to MME, send service response message, MME is after receiving this service response message, by the parameter of carrying in the judgement title of service response message or this service response message, know judged result, and send a notification message to subscriber equipment, so that the notification message that subscriber equipment sends according to MME operates accordingly.When this service response message indicates this mobile switching centre's judgement to accept the CSFB call request of described subscriber equipment, notification message is used to indicate subscriber equipment and initiates access request to mobile switching centre; Or when this service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, notification message is used to indicate subscriber equipment Bu Xiang mobile switching centre and initiates access request.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre judges whether to accept the CSFB call request of subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system.
Before above-mentioned MME receives the CSFB call request of subscriber equipment transmission, this subscriber equipment access Long Term Evolution LTE network, above-mentioned CSFB call request is for user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
Scene before the CSFB call request that MME reception subscriber equipment sends is subscriber equipment access Long Term Evolution LTE network, and this subscriber equipment is the terminal under LTE network, when subscriber equipment carries out CS business, first connects with LTE base station; Afterwards, LTE base station sends expansion service request (Extended Service Request) to MME now needs the CS business of carrying out so that MME is known this subscriber equipment, after MME receives expansion service request, to LTE base station, send a response message, indication LTE base station is by the Connection Release of setting up between subscriber equipment and LTE base station before, and equipment for indicating user sends CSFB call request to MME, in order to request, be linked into 2G network or 3G network, and then carry out CS business.
If being MSC, above-mentioned judged result accepts the CSFB call request of subscriber equipment, MME is known judged result according to the parameter of carrying in the title of service response message or this service response message, equipment for indicating user falls back to 2G network or the backward MSC of 3G network initiates access request, afterwards according to the normal calling procedure of finishing dealing with of prior art; If judged result is the CSFB call request of MSC refusal subscriber equipment, the MSC that judgment result is that MME is known according to the parameter of carrying in the title of service response message or this service response message does not accept the CSFB call request of subscriber equipment, MME indicating terminal does not fall back to 2G or 3G network, and then to MSC, do not send access request, exit the initiation of CS business.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre judges whether to accept the CSFB call request of subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system, simultaneously MSC in advance and between MME, carry out the judgement of CSFB call request, has also saved the time that subscriber equipment under LTE network carries out CS business, has improved the efficiency of subscriber equipment CSGB call business.
Fig. 4 is the signaling process figure of the cut-in method embodiment tetra-of circuit domain dropping CSFB provided by the invention, and as shown in Figure 4, the method comprises the steps:
S401: subscriber equipment sends radio resource control (Radio Resource Control, hereinafter to be referred as RRC) connection request to LTE base station, so that subscriber equipment can send to LTE base station CSFB call request.
S402:LTE base station sends RRC connection establishment response to subscriber equipment.
S403:LTE base station sends expansion service request message to MME.
S404:MME, according to expansion service request, sends service request information to MSC.
S405:MSC judges whether to accept the CSFB call request of subscriber equipment according to this service request information, obtain judged result.
MME sends service request information to MSC, so that MSC judges whether to accept the CSFB call request of subscriber equipment according to this service request information, be at least one the judgement acceptance in MSC call request asks to access according to CSFB network, the self-ability of MSC and the load of MSC place network or CSFB call request of refusing subscriber equipment, obtain judged result.
S406:MSC sends service response message according to above-mentioned judged result to MME; If service response message instruct MS C accepts the CSFB call request of subscriber equipment, carry out S407; If the CSFB call request of this service response message instruct MS C refusal subscriber equipment, carries out S409.
S407:MME allows subscriber equipment fall back to 2G or 3G network according to this service response message indication LTE base station.
MME receives after service response message, can to LTE base station, send initialization and connect the request of foundation, and the RRC that LTE can releasing user equipment be set up with LTE base station is connected; After above-mentioned RRC Connection Release, LTE base station equipment for indicating user falls back to 2G network or 3G network
S408: subscriber equipment sends access request to MSC.
S409:MME sends a notification message to subscriber equipment, so that subscriber equipment is not initiated access request to MSC.
If the determination result is NO for above-mentioned MSC, be that above-mentioned service response message is while being the CSFB call request of instruct MS C refusal subscriber equipment, MME can directly send a notification message to subscriber equipment, make subscriber equipment to MSC, not send access request, it should be noted that, be now not need base station controller or radio network controller to participate in, therefore also reduced the extra expense of system.
In the method that the embodiment of the present invention provides, by mobile management entity, to mobile switching centre, send service request information, mobile switching centre judges whether to accept the CSFB call request of subscriber equipment according to this service request information, and to mobile management entity, send service response message according to judged result, make mobile management entity whether to mobile switching centre, send access request according to service response message notifying user equipment, avoided subscriber equipment to initiate the extra expense of system that access request is brought falling back to the second generation or 3G (Third Generation) Moblie technical network Hou Xiang mobile switching centre, reduced the load of system, simultaneously MSC in advance and between MME, carry out the judgement of CSFB call request, has also saved the time that subscriber equipment under LTE network carries out CS business, has improved the efficiency of subscriber equipment CSGB call business.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Fig. 5 is the structural representation of the embodiment of mobile switching centre mono-provided by the invention, as shown in Figure 5, this mobile switching centre comprises: receiver module 40, the service request information sending for receiving mobile management entity, this service request information is used to indicate mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity; Judge module 41, for judging the CSFB call request of accepting or refusing subscriber equipment, obtains judged result; Sending module 42, for sending service response message according to above-mentioned judged result to mobile management entity, so that above-mentioned mobile management entity sends a notification message to subscriber equipment according to service response message.
The mobile switching centre that the embodiment of the present invention relates to can carry out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
On above-mentioned basis embodiment illustrated in fig. 5, above-mentioned judge module 41 accepts or refuses CSFB call request of subscriber equipment specifically at least one judgement in network, the self-ability of above-mentioned mobile switching centre and the load of above-mentioned mobile switching centre place network asking according to above-mentioned CSFB call request to access; When above-mentioned service response message indicates above-mentioned judge module 41 judgements to accept the CSFB call request of subscriber equipment, above-mentioned notification message is used to indicate subscriber equipment and initiates access request to mobile switching centre; Or when the CSFB call request of subscriber equipmenies is refused in 41 judgements of above-mentioned service response message indication judge module, above-mentioned notification message is used to indicate subscriber equipment Bu Xiang mobile switching centre and initiates access request.
Fig. 6 is the structural representation of the embodiment of mobile switching centre bis-provided by the invention, on above-mentioned basis embodiment illustrated in fig. 5, this mobile switching centre also comprises: the first statistical module 43, for sending module 42 according to above-mentioned judged result after mobile management entity sends service response message, according to above-mentioned judged result statistics CSFB, fall after rise and initiate number of times, concrete statistic procedure can be with reference to the description of S201.
The mobile switching centre that the embodiment of the present invention relates to can carry out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Further, on basis embodiment illustrated in fig. 6, this mobile switching centre also comprises: the second statistical module 44, for sending module 42 according to above-mentioned judged result after mobile management entity sends service response message, according to above-mentioned judged result statistics CSFB, fall number of success after rise, concrete statistic procedure can be with reference to the description of S202; And comprise determination module 45, for after the second statistical module 44 falls number of success after rise according to the oneself state statistics CSFB of mobile switching centre, according to CSFB falling initiation number of times and CSFB falling number of success, determine that the CSFB of subscriber equipment falls success rate after rise; And above-mentioned receiver module 40 is before receiving the service request information of mobile management entity transmission, subscriber equipment access Long Term Evolution LTE network, above-mentioned CSFB call request is for user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
The mobile switching centre that the embodiment of the present invention relates to can carry out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Fig. 7 is the structural representation of mobile management entity embodiment mono-provided by the invention, and as shown in Figure 7, this mobile management entity comprises: the first receiver module 60, the circuit domain dropping CSFB call request sending for receiving subscriber equipment; The first sending module 61, for sending service request information according to CSFB call request ，Xiang mobile switching centre, this service request information is used to indicate mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment; The second receiver module 62, the service response message sending for receiving mobile switching centre; The second sending module 63, for sending a notification message to subscriber equipment according to above-mentioned service response message, so that subscriber equipment determines whether to initiate access request to mobile switching centre according to above-mentioned notification message.
The mobile management entity that the embodiment of the present invention relates to can be carried out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Further, on above-mentioned basis embodiment illustrated in fig. 7, when above-mentioned service response message indicates mobile switching centre's judgement to accept the CSFB call request of subscriber equipment, above-mentioned notification message is used to indicate subscriber equipment and initiates access request to mobile switching centre; Or when above-mentioned service response message is indicated the CSFB call request of mobile switching centre's judgement refusal subscriber equipment, above-mentioned notification message is used to indicate subscriber equipment Bu Xiang mobile switching centre and initiates access request.
Further, on above-mentioned basis embodiment illustrated in fig. 7, before described the second receiver module 63 receives the CSFB call request of subscriber equipment transmission, this subscriber equipment access Long Term Evolution LTE network, above-mentioned CSFB call request is for user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
The mobile management entity that the embodiment of the present invention relates to can be carried out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Fig. 8 is the structural representation of the embodiment of mobile switching centre tri-provided by the invention, as shown in Figure 8, this mobile switching centre comprises: receiver 70, the service request information sending for receiving mobile management entity, this service request information is used to indicate mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity; Processor 71, for judging the CSFB call request of accepting or refusing subscriber equipment, obtains judged result; Transmitter 72, for sending service response message according to above-mentioned judged result to mobile management entity, so that mobile management entity sends a notification message to subscriber equipment according to this service response message.
Optionally, above-mentioned processor 71 is specifically for asking at least one judgement in network, the self-ability of mobile switching centre and the load of mobile switching centre's place network of access to be accepted or CSFB call request of refusal subscriber equipment according to above-mentioned CSFB call request.
Optionally, when the CSFB call request of subscriber equipment is accepted in described service response message instruction processorunit 71 judgements, above-mentioned notification message is used to indicate subscriber equipment and initiates access request to mobile switching centre; Or when the CSFB call request of described subscriber equipment is refused in above-mentioned service response message instruction processorunit 71 judgements, above-mentioned notification message is used to indicate subscriber equipment Bu Xiang mobile switching centre and initiates access request.
Optionally, processor 71 can also for transmitter 72 according to judged result after mobile management entity sends service response message, according to above-mentioned judged result statistics CSFB, fall after rise and initiate number of times.
Optionally, processor 71 can also for transmitter 72 according to judged result after mobile management entity sends service response message, according to above-mentioned judged result statistics CSFB, fall number of success after rise.
Optionally, processor 71 can also, for after processor 71 falls number of success after rise according to the oneself state statistics CSFB of mobile switching centre, determine that according to CSFB falling initiation number of times and CSFB falling number of success the CSFB of described subscriber equipment falls success rate after rise.
Optionally, receiver 70 is before receiving the service request information of mobile management entity transmission, this subscriber equipment access Long Term Evolution LTE network, above-mentioned CSFB call request is for user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
The mobile switching centre that the embodiment of the present invention relates to can carry out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Fig. 9 is the structural representation of mobile management entity embodiment bis-provided by the invention, as shown in Figure 9, this mobile management entity comprises: receiver 80, the circuit domain dropping CSFB call request sending for receiving subscriber equipment, the service response message also sending for receiving mobile switching centre; Transmitter 81, for sending service request information according to CSFB call request ，Xiang mobile switching centre, this service request information is used to indicate mobile switching centre and determines the CSFB call request of accepting or refusing described subscriber equipment; Also for sending a notification message to subscriber equipment according to service response message, so that subscriber equipment determines whether to initiate access request to mobile switching centre according to this notification message.
Optionally, during the CSFB call request of the described subscriber equipment of above-mentioned service response message indication mobile switching centre's judgement acceptance, above-mentioned notification message is used to indicate subscriber equipment and initiates access request to mobile switching centre; Or when above-mentioned service response message is indicated the CSFB call request of mobile switching centre's judgement refusal subscriber equipment, above-mentioned notification message is used to indicate subscriber equipment Bu Xiang mobile switching centre and initiates access request.
Optionally, before receiver 80 receives the CSFB call request of subscriber equipment transmission, this subscriber equipment access Long Term Evolution LTE network, above-mentioned CSFB call request is for user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
The mobile management entity that the embodiment of the present invention relates to can be carried out said method embodiment, and it realizes principle and technique effect is similar, does not repeat them here.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (20)
1. a cut-in method of circuit domain dropping CSFB, is characterized in that, comprising:
Mobile switching centre receives the service request information that mobile management entity sends, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity;
The CSFB call request of described subscriber equipment is accepted or is refused in the judgement of described mobile switching centre, obtains judged result;
Described mobile switching centre sends service response message according to described judged result to described mobile management entity, so that described mobile management entity sends a notification message to described subscriber equipment according to described service response message.
2. method according to claim 1, is characterized in that, the CSFB call request of subscriber equipment is accepted or refused in the judgement of described mobile switching centre, comprising:
CSFB call request of described subscriber equipment is accepted or is refused at least one judgement in network, the self-ability of described mobile switching centre and the load of described mobile switching centre place network that described mobile switching centre asks to access according to described CSFB call request.
3. method according to claim 1 and 2, it is characterized in that, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
4. according to the method described in claim 1-3 any one, it is characterized in that, described mobile switching centre, also comprises according to described judged result after described mobile management entity sends service response message:
Described mobile switching centre falls after rise and initiates number of times according to described judged result statistics CSFB.
5. method according to claim 4, is characterized in that, described mobile switching centre, also comprises according to described judged result after described mobile management entity sends service response message:
Number of success is fallen after rise according to described judged result statistics CSFB in described mobile switching centre.
6. method according to claim 5, is characterized in that, described mobile switching centre also comprises after falling number of success after rise according to the oneself state statistics CSFB of described mobile switching centre:
Described mobile switching centre falls initiation number of times after rise according to described CSFB and described CSFB falls the CSFB falling success rate that number of success is determined described subscriber equipment after rise.
7. according to the method described in claim 1-6 any one, it is characterized in that, before described mobile switching centre receives the service request information of mobile management entity transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
8. a cut-in method of circuit domain dropping CSFB, is characterized in that, comprising:
Mobile management entity receives the circuit domain dropping CSFB call request that subscriber equipment sends;
Described mobile management entity sends service request information according to described CSFB call request ，Xiang mobile switching centre, and described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing described subscriber equipment;
Described mobile management entity receives the service response message that described mobile switching centre sends;
Described mobile management entity sends a notification message to described subscriber equipment according to described service response message, so that described subscriber equipment determines whether to initiate access request to described mobile switching centre according to described notification message.
9. method according to claim 8, it is characterized in that, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
10. method according to claim 8 or claim 9, it is characterized in that, before described mobile management entity receives the described CSFB call request of described subscriber equipment transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
11.Yi Zhong mobile switching centre, is characterized in that, comprising:
Receiver module, the service request information sending for receiving mobile management entity, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing subscriber equipment, and described service request information is sent after the described CSFB call request that receives described subscriber equipment transmission by described mobile management entity;
Judge module, for judging the CSFB call request of accepting or refusing described subscriber equipment, obtains judged result;
Sending module, for sending service response message according to described judged result to described mobile management entity, so that described mobile management entity sends a notification message to described subscriber equipment according to described service response message.
12. mobile switching centres according to claim 11, it is characterized in that, described judge module accepts or refuses CSFB call request of described subscriber equipment specifically at least one judgement in network, the self-ability of described mobile switching centre and the load of described mobile switching centre place network asking according to described CSFB call request to access.
13. according to the mobile switching centre described in claim 11 or 12, it is characterized in that, when described service response message indicates described judge module judgement to accept the CSFB call request of described subscriber equipment, described notification message indicates described subscriber equipment to initiate access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described judge module judgement refusal, described notification message indicates described subscriber equipment to described mobile switching centre, not initiate access request.
14. according to the mobile switching centre described in claim 11-13 any one, it is characterized in that, described mobile switching centre also comprises:
The first statistical module, for described sending module according to described judged result after described mobile management entity sends service response message, according to described judged result statistics CSFB, fall after rise and initiate number of times.
15. mobile switching centres according to claim 14, is characterized in that, described mobile switching centre also comprises:
The second statistical module, for described sending module according to described judged result after described mobile management entity sends service response message, according to described judged result statistics CSFB, fall number of success after rise.
16. mobile switching centres according to claim 15, is characterized in that, described mobile switching centre also comprises:
Determination module, after adding up CSFB falling number of success according to described mobile switching centre oneself state at described the second statistical module, according to described CSFB falling initiation number of times and described CSFB, fall the CSFB falling success rate that number of success is determined described subscriber equipment after rise.
17. according to the mobile switching centre described in claim 11-16 any one, it is characterized in that, before described receiver module receives the service request information of mobile management entity transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
18. 1 kinds of mobile management entities, is characterized in that, comprising:
The first receiver module, the circuit domain dropping CSFB call request sending for receiving subscriber equipment;
The first sending module, for sending service request information according to described CSFB call request ，Xiang mobile switching centre, described service request information is used to indicate described mobile switching centre and determines the CSFB call request of accepting or refusing described subscriber equipment;
The second receiver module, the service response message sending for receiving described mobile switching centre;
The second sending module, for sending a notification message to described subscriber equipment according to described service response message, so that described subscriber equipment determines whether to initiate access request to described mobile switching centre according to described notification message.
19. mobile management entities according to claim 18, it is characterized in that, when described service response message indicates the judgement of described mobile switching centre to accept the CSFB call request of described subscriber equipment, described notification message is used to indicate described subscriber equipment and initiates access request to described mobile switching centre; Or,
When described service response message is indicated the CSFB call request of the described subscriber equipment of described mobile switching centre's judgement refusal, described notification message is used to indicate described subscriber equipment and to described mobile switching centre, does not initiate access request.
20. according to the mobile management entity described in claim 18 or 19, it is characterized in that, before described the second receiver module receives the described CSFB call request of described subscriber equipment transmission, described subscriber equipment access Long Term Evolution LTE network, described CSFB call request is for described user equipment requests access Generation Mobile Telecommunication System network or 3G (Third Generation) Moblie technical network.
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