CN103609168B - 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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- CN103609168B CN103609168B CN201380000616.2A CN201380000616A CN103609168B CN 103609168 B CN103609168 B CN 103609168B CN 201380000616 A CN201380000616 A CN 201380000616A CN 103609168 B CN103609168 B CN 103609168B
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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, more particularly to a kind of cut-in method of circuit domain dropping CSFB, mobile management
Entity and mobile switching centre.
Background technology
With the development of mobile communication technology, mobile network is from initial Generation Mobile Telecommunication System technology (Second
Generation, hereinafter referred to as 2G) network gradually evolution Long Term Evolution popular up till now（Long Term Evolution, with
Lower abbreviation LTE）Network, in order that terminal can initiate the circuit switching such as voice service in the case where LTE network is accessed（Circuit
Switching, hereinafter referred to as CS）Business and the paging of CS business is received, and terminal can entered in the lte networks
Capable packet switch（Packet Switching, hereinafter referred to as PS）Business is correctly processed, and generates circuit domain dropping
（Circuit Switched Fallback, hereinafter referred to as CSFB）Technology, i.e., processing voice industry in the terminal that LTE is covered in
During business, terminal first falls back to CS networks, and speech business is carried out under CS networks, has thus reached the existing CS networks of reuse and has set
It is standby to provide speech business for the user in LTE network.
In prior art, terminal is under LTE network to mobile management entity（Mobility Management Entity,
Hereinafter referred to as MME）When initiating speech business caller, typically LTE base station sends expansion service request to MME（Extended
Service Request）So that MME knows that terminal will carry out CS business, and further instruction terminal falls back to 2G/3G networks to MME,
To mobile switching centre after terminal falls back to 2G/3G（Mobile Switch Center, hereinafter referred to as MSC）Initiate to access and ask
Ask, whether allow UE to initiate CS business according to the priority and the system loading Determines of itself of user by MSC.
But, during prior art terminal initiates CS business after falling back to 2G/3G, generally required LTE base station, base
The participation of station control etc. is processed, and the load overhead for thus resulting in system is larger.
The content of the invention
Embodiments provide a kind of cut-in method of circuit domain dropping CSFB, mobile management entity and mobile switch
Center, solves during terminal initiates CS business after falling back to 2G or 3G network from LTE network in prior art, because of LTE
The big technical problem of system loading expense that base station, the participation of base station controller are caused.
Embodiment of the present invention first aspect provides a kind of cut-in method of circuit domain dropping CSFB, including：
Mobile switching centre receives the service request information that mobile management entity sends, and the service request information is used to refer to
Show that the mobile switching centre determines the CSFB call request for receiving or refusing user equipment, the service request information is by described
Mobile management entity is sent after the CSFB call request that the user equipment sends is received；
The mobile switching centre judges the CSFB call request for receiving or refusing the user equipment, obtains judging knot
Really；
The mobile switching centre sends service response message to the mobile management entity according to the judged result, with
The mobile management entity is made to be sent a notification message to the user equipment according to the service response message.
With reference in a first aspect, in the first possible embodiment of first aspect, the mobile switching centre judges
Receive or refuse the CSFB call request of user equipment, including：
Network, the mobile switching centre of the mobile switching centre according to the asked access of the CSFB call request
Self-ability and mobile switching centre place network load at least one judge to receive or refuse the use
The CSFB call request of family equipment.
With reference to the first possible embodiment of first aspect or first aspect, second in first aspect is possible
In embodiment, the service response message indicates that the mobile switching centre judges to receive the CSFB callings of the user equipment
During request, then the notification message is used to indicate that the user equipment initiates access request to the mobile switching centre；Or,
The service response message indicates that the mobile switching centre judges that the CSFB callings of the refusal user equipment please
When asking, then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
Any one of second possible embodiment with reference to first aspect to first aspect, the of first aspect
In three kinds of possible embodiments, the mobile switching centre sends to the mobile management entity according to the judged result and takes
After business response message, also include：
The mobile switching centre counts CSFB according to the judged result and falls initiation number of times after rise.
With reference to the third possible embodiment of first aspect, in the 4th kind of possible embodiment of first aspect
In, after the mobile switching centre sends service response message to the mobile management entity according to the judged result, also
Including：
The mobile switching centre counts CSFB according to the judged result and falls number of success after rise.
With reference to the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment of first aspect
In, after the mobile switching centre counts CSFB falling number of success according to mobile switching centre's oneself state, also wrap
Include：
The mobile switching centre falls initiation number of times after rise according to the CSFB and the CSFB falls number of success after rise and determines institute
The CSFB for stating user equipment falls success rate after rise.
Any one of the 5th kind of possible embodiment with reference to first aspect to first aspect, the of first aspect
In six kinds of possible embodiments, before the mobile switching centre receives the service request information that mobile management entity sends,
The user equipment accesses Long Term Evolution LTE network, and the CSFB call request is used for the user equipment requests and accesses second
Third generation mobile communication network or G mobile communication network.
Embodiment of the present invention second aspect provides a kind of cut-in method of circuit domain dropping CSFB, including：
The circuit domain dropping CSFB call request that mobile management entity receive user equipment sends；
The mobile management entity sends service request information to mobile switching centre according to the CSFB call request,
The service request information is used to indicate that the mobile switching centre determines the CSFB callings for receiving or refusing the user equipment
Request；
The mobile management entity receives the service response message that the mobile switching centre sends；
The mobile management entity sends a notification message to the user equipment according to the service response message, so that institute
State user equipment and determine whether that the mobile switching centre initiates access request according to the notification message.
With reference to second aspect, in the first possible embodiment of second aspect, the service response message is indicated
When the mobile switching centre judges to receive the CSFB call request of the user equipment, then the notification message is used to indicate institute
State user equipment access request is initiated to the mobile switching centre；Or,
The service response message indicates that the mobile switching centre judges that the CSFB callings of the refusal user equipment please
When asking, then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
With reference to the first possible embodiment of second aspect or second aspect, second in second aspect is possible
In embodiment, before the mobile management entity receives the CSFB call request that the user equipment sends, the use
Family equipment accesses Long Term Evolution LTE network, and the CSFB call request is used for the user equipment requests and accesses second filial generation movement
Communication network or G mobile communication network.
The embodiment of the present invention third aspect provides a kind of mobile switching centre, including：
Receiver module, for receiving the service request information of mobile management entity transmission, the service request information is used for
Indicate that the mobile switching centre determines the CSFB call request for receiving or refusing user equipment, the service request information is by institute
State mobile management entity to send after the CSFB call request that the user equipment sends is received；
Judge module, for judging to receive or refuse the CSFB call request of the user equipment, obtains judged result；
Sending module, for service response message being sent to the mobile management entity according to the judged result, so that
The mobile management entity sends a notification message to the user equipment according to the service response message.
With reference to the third aspect, in the first possible embodiment of the third aspect, the judge module specifically for
Network, the self-ability of the mobile switching centre and the mobile friendship according to the asked access of the CSFB call request
At least one judgement in the load of switching center9's place network receives or refuses the CSFB call request of the user equipment.
With reference to the first possible embodiment of the third aspect or the third aspect, second in the third aspect is possible
In embodiment, the service response message indicates that the judge module judges to receive the CSFB call request of the user equipment
When, then the notification message is used to indicate that the user equipment initiates access request to the mobile switching centre；Or,
When the service response message indicates that the judge module judges the CSFB call request of the refusal user equipment,
Then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
Any one of second possible embodiment with reference to the third aspect to the third aspect, the of the third aspect
In three kinds of possible embodiments, the mobile switching centre also includes：
First statistical module, for being sent to the mobile management entity according to the judged result in the sending module
After service response message, CSFB is counted according to the judged result and falls initiation number of times after rise.
With reference to the third possible embodiment of the third aspect, in the 4th kind of possible embodiment of the third aspect
In, the mobile switching centre also includes：
Second statistical module, for being sent to the mobile management entity according to the judged result in the sending module
After service response message, CSFB is counted according to the judged result and falls number of success after rise.
With reference to the 4th kind of possible embodiment of the third aspect, in the 5th kind of possible embodiment of the third aspect
In, the mobile switching centre also includes：
Determining module, returns for counting CSFB according to mobile switching centre's oneself state in second statistical module
After the number of success that falls, initiation number of times is fallen after rise according to the CSFB and the CSFB falls number of success after rise and determines the user equipment
CSFB fall after rise success rate.
Any one of the 5th kind of possible embodiment with reference to the third aspect to the third aspect, the of the third aspect
It is in six kinds of possible embodiments, before the receiver module receives the service request information that mobile management entity sends, described
User equipment accesses Long Term Evolution LTE network, and the CSFB call request is used for the user equipment requests and accesses second filial generation shifting
Dynamic communication network or G mobile communication network.
Embodiment of the present invention fourth aspect provides a kind of mobile management entity, including：
First receiver module, for the circuit domain dropping CSFB call request that receive user equipment sends；
First sending module, for according to the CSFB call request, sending service request information to mobile switching centre,
The service request information is used to indicate that the mobile switching centre determines the CSFB callings for receiving or refusing the user equipment
Request；
Second receiver module, for receiving the service response message that the mobile switching centre sends；
Second sending module, for being sent a notification message to the user equipment according to the service response message, so that
According to the notification message, the user equipment determines whether that the mobile switching centre initiates access request.
With reference to fourth aspect, in the first possible embodiment of fourth aspect, the service response message is indicated
When the mobile switching centre judges to receive the CSFB call request of the user equipment, then the notification message is used to indicate institute
State user equipment access request is initiated to the mobile switching centre；Or,
The service response message indicates that the mobile switching centre judges that the CSFB callings of the refusal user equipment please
When asking, then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
With reference to the first possible embodiment of fourth aspect or fourth aspect, second in fourth aspect is possible
In embodiment, before second receiver module receives the CSFB call request that the user equipment sends, the use
Family equipment accesses Long Term Evolution LTE network, and the CSFB call request is used for the user equipment requests and accesses second filial generation movement
Communication network or G mobile communication network.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment according to the service request information, and according to sentencing
Disconnected result sends service response message to mobile management entity so that mobile management entity notifies user according to service response message
Whether equipment send access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or third generation movement is logical
The extra expense of the system brought of access request is initiated to mobile switching centre after letter technical network, the negative of system is reduced
Lotus.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
The schematic flow sheet of the cut-in method embodiment one of the circuit domain dropping CSFB that Fig. 1 is provided for the present invention；
The schematic flow sheet of the cut-in method embodiment two of the circuit domain dropping CSFB that Fig. 2 is provided for the present invention；
The schematic flow sheet of the cut-in method embodiment three of the circuit domain dropping CSFB that Fig. 3 is provided for the present invention；
The signaling process figure of the cut-in method example IV of the circuit domain dropping CSFB that Fig. 4 is provided for the present invention；
The structural representation of mobile switching centre's embodiment one that Fig. 5 is provided for the present invention；
The structural representation of mobile switching centre's embodiment two that Fig. 6 is provided for the present invention；
The structural representation of the mobile management entity embodiment one that Fig. 7 is provided for the present invention；
The structural representation of mobile switching centre's embodiment three that Fig. 8 is provided for the present invention；
The structural representation of the mobile management entity embodiment two that Fig. 9 is provided for the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The techniques described herein may be used in various communication systems, such as current 2G, 3G communication systems and next generation communication
System, such as global system for mobile communications（GSM, Global System for Mobile communications）, code division is more
Location（CDMA, Code Division Multiple Access）System, time division multiple acess（TDMA, Time Division
Multiple Access）System, WCDMA（WCDMA, Wideband Code Division Multiple
Access Wireless）, frequency division multiple access（FDMA, Frequency Division Multiple Addressing）System, just
Hand over frequency division multiple access（OFDMA, Orthogonal Frequency-Division Multiple Access）System, single carrier
FDMA（SC-FDMA）System, GPRS (general packet radio service)（GPRS, General Packet Radio Service）System is long
Phase evolution（LTE, Long Term Evolution）System and other such communication systems.
The terminal being related in the application, i.e. user equipment, can be wireless terminal can also be catv terminal, wireless terminal
May refer to provide a user with the equipment of voice and/or data connectivity, the portable equipment with wireless connecting function or company
It is connected to other processing equipments of radio modem.Wireless terminal can be with Jing wireless access networks（For example, RAN, Radio
Access Network）Communicated with one or more core nets, wireless terminal can be mobile terminal, such as mobile phone
（Or it is referred to as " honeycomb " phone）With the computer with mobile terminal, for example, it may be portable, pocket, hand-held, calculating
The built-in or vehicle-mounted mobile device of machine, they exchange language and/or data with wireless access network.For example, personal communication industry
Business（PCS, Personal Communication Service）Phone, wireless phone, Session initiation Protocol（SIP）Phone, nothing
Line local loop（WLL, Wireless Local Loop）Stand, personal digital assistant（PDA, Personal Digital
Assistant）Deng equipment.Wireless terminal is referred to as system, subscri er unit（Subscriber Unit）, subscriber station
（Subscriber Station）, movement station（Mobile Station）, mobile station（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）, user equipment（User Device）、
Or subscriber's installation（User Equipment）.
The base station being related in the application（For example, access point）May refer in access network on interface in the air by one or
Multiple sectors and the equipment of wireless terminal communications.The air frame that base station can be used to receive mutually is changed with IP packets, is made
For the router between wireless terminal and the remainder of access network, the remainder of wherein access network may include Internet protocol
（IP）Network.Attribute management of the base station also tunable to air interface.For example, base station can be the AP of WLAN WLAN,
It can also be the base station in GSM or CDMA（BTS, Base Transceiver Station）, or the base station in WCDMA
（NodeB）, can also be the evolved base station in LTE（NodeB or eNB or e-NodeB, evolutional Node B）, this
Application is not limited.
The schematic flow sheet of the cut-in method embodiment one of the circuit domain dropping CSFB that Fig. 1 is provided for the present invention, the present invention
The executive agent of the method that embodiment is related to is MSC, as shown in figure 1, the method includes：
S101：MSC receives the service request information that MME sends, and the service request information is used to indicate that the MSC determines acceptance
Or the CSFB call request of refusal user equipment, the CSFB callings that the service request information is sent in receive user equipment by MME
Send after request.
Specifically, service request information here may indicate that in itself and allow MSC to judge to receive or refuse user equipment
CSFB call request, i.e. MSC receive service request information, then it is known that oneself will start to judge whether to receive user equipment
CSFB call request.
S102：MSC judges the CSFB call request for receiving or refusing above-mentioned user equipment, obtains judged result.
Specifically, user equipment initiates CS calling services, i.e., send CSFB call request to MME, and MME is receiving user
After the CSFB call request that equipment sends, service request information is sent to MSC by SGs interfaces（Service Request）,
The SGs interfaces are the interfaces communicated between MSC and MME, for CS networks and Evolved Packet Core（Evolved
Packet Core, hereinafter referred to as EPC）Between mobile management, the business such as paging and sending and receiving short messages；MSC is being received
Judge to receive or refuse the CSFB call request of user equipment after the service request information, obtain judged result.
S103：MSC sends service response message to MME according to above-mentioned judged result, so that MME is according to above-mentioned service response
Message sends a notification message to user equipment.
Specifically, MSC sends service response message to MME according to above-mentioned judged result, and MME is receiving the service response
After message, by judging that the parameter carried in the title or the service response message of service response message knows judged result,
And send a notification message to user equipment, so that user equipment is operated accordingly according to the notification message that MME sends, that is, keep away
Exempt from user equipment 2G/3G networks to be fallen back in the case where mobile switching centre's judged result is not known and is sent out to mobile switching centre
Play access request and the access request is refused by mobile switching centre, so as to the problem of the overhead of system for causing.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment, and root according to service request information determination
It is judged that result sends service response message to mobile management entity so that mobile management entity is notified according to service response message
Whether user equipment sends access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or the third generation moves
The extra expense of the system brought of access request is initiated to mobile switching centre after dynamic communication technology network, system is reduced
Load.
In above-mentioned embodiment illustrated in fig. 1, S102 can include：Nets of the MSC according to the asked access of CSFB call request
At least one judgement in the load of network, the self-ability of MSC and MSC places network receives or refuses the CSFB of user equipment
Call request；And when above-mentioned service response message indicates that MSC receives the CSFB call request of user equipment, above-mentioned notification message
Instruction user equipment initiates access request to MSC；Or, above-mentioned service response message indicates that MSC refuses the CSFB of user equipment
During call request, above-mentioned notification message instruction user equipment does not initiate access request to MSC.
It should be noted that in above-described embodiment 1, MSC before the service request information that MME sends is received, Yong Hushe
Standby access is Long Term Evolution LTE network, i.e., the user equipment is the terminal under LTE network, carries out CS in user equipment
During business, set up with LTE base station first and be connected；Afterwards, LTE base station sends expansion service request to MME（Extended
Service Request）So that MME knows that the user equipment now needs the CS business for carrying out, MME receives expansion service please
After asking, a response message is sent to LTE base station, indicate LTE base station by the company for setting up between user equipment and LTE base station before
Release is connect, and instruction user equipment sends CSFB call request to MME, to ask to be linked into Generation Mobile Telecommunication System technology
（Second Generation, hereinafter referred to as 2G）Network or G mobile communication（Third Generation, below
Abbreviation 3G）Network, and then carry out CS business, wherein, above-mentioned CSFB call request be used for user equipment requests access 2G networks or
3G network.
In said process, MSC judges whether the CSFB call request for receiving user equipment, actually and carries out flow control
The process of system or resource reservation, i.e. the service of differentiation can be that high-priority users or business provide higher call completion rate
With service quality, in the case where MSC system loadings are higher, often by the user service first for high priority or pre-
Some Service Sources are stayed, therefore, MSC judges whether to receive user equipment this CSFB call request, is exhaled according to the CSFB
It is at least one of load these three information of the network, the ability of MSC itself and MSC places network of asking asked access
Judged, when system loading is higher, refusal falls the CSFB call request of the user of some low priorities, receives Gao You
The CSFB call request of first level user, it is ensured that the percent of call completed of the customer service of some high priorities.
In said process, if judged result is MSC receiving the CSFB call request of user equipment, MME is rung according to service
The parameter carried in the title or the service response message of answering message knows judged result, and instruction user equipment falls back to 2G networks
Or access request is initiated to MSC after 3G network, normal calling procedure is completed according to the process of prior art afterwards；If judging knot
Fruit is the CSFB call request that MSC refuses user equipment, then title or the service response message of the MME according to service response message
The judged result that the parameter of middle carrying is known is the CSFB call request that MSC does not receive user equipment, then MME instruction terminals are not returned
Fall 2G or 3G network, and then access request is not sent to MSC, exit the initiation of CS business, i.e. MSC and have rejected user in advance setting
Standby CSFB call request, and need not be as the participation of the base station controller in 3G network is needed in prior art.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment according to the service request information, and according to sentencing
Disconnected result sends service response message to mobile management entity so that mobile management entity notifies user according to service response message
Whether equipment send access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or third generation movement is logical
The extra expense of the system brought of access request is initiated to mobile switching centre after letter technical network, the negative of system is reduced
Lotus；MSC carries out the judgement of CSFB call request in advance between MME simultaneously, and the user equipment also saved under LTE network is carried out
The time of CS business, improve the efficiency of user equipment CSFB call business.
The schematic flow sheet of the cut-in method embodiment two of the circuit domain dropping CSFB that Fig. 2 is provided for the present invention, above-mentioned
On the basis of embodiment, after step s 103, the method has still further comprised the enforcement of the accurate calculating for falling success rate after rise
Method, comprises the steps：
S201：MSC counts CSFB according to above-mentioned judged result and falls initiation number of times after rise.
Specifically, after MSC sends service response message to MME according to judged result, can also be according to the judged result
Statistics CSFB falls after rise and initiates number of times；If MSC receives the CSFB call request of user equipment, CSFB fallings can be once counted upper
Jia 1 on the basis of initiating number of times；If MSC refuses the CSFB call request of user equipment, after service response is sent to MME
Count CSFB and fall initiation number of times after rise, the CSFB for counting here falls initiation number of times after rise then will not Jia 1 on the basis of upper once statistics,
And be to continue with continuing to use the last CSFB falling initiation number of times for being counted.
On the basis of above-mentioned embodiment illustrated in fig. 2, after S201, the method has been still further comprised and has fallen successfully secondary after rise
Several determination methods, comprises the steps：
S202：MSC counts CSFB according to above-mentioned judged result and falls number of success after rise.
CSFB falls number of success after rise and can be counted according to following statistical, if the judged result of S102 is MSC
Receive the CSFB call request of user equipment, and MSC receives the access request or receipts of user equipment from 2G networks or 3G network
To attaching position register（Home Location Register, hereinafter referred to as HLR）Cancellation it is local（Cancel
Location）Message, then Jia 1 in upper once statistics on the basis of CSFB falls number of success after rise；If the judged result of S102 is
MSC refuses the CSFB call request of user equipment, then will not Jia 1 in upper once statistics on the basis of CSFB falls number of success after rise,
And be to continue with continuing to use the last CSFB falling number of success for being counted.
S203：MSC falls initiation number of times after rise according to above-mentioned CSFB and CSFB falls the CSFB that number of success determines user equipment after rise
Fall success rate after rise.
Number of success can be fallen after rise using the CSFB that S202 is obtained initiation number of times determination is fallen after rise divided by the CSFB that S201 is obtained
Fall success rate after rise.
In method provided in an embodiment of the present invention, fall successfully secondary after rise by counting CSFB according to service response message by MSC
Number and CSFB fall after rise and initiate number of times, and then determination falls success rate after rise, improves the accuracy for falling that success rate is calculated after rise, also so that being
According to falling success rate, system attendant more accurately can judge whether system is normally run.
The schematic flow sheet of the cut-in method embodiment three of the circuit domain dropping CSFB that Fig. 3 is provided for the present invention, the present invention
The method that embodiment is related to is mobile management entity, as shown in figure 3, the method includes：
S301：The CSFB call request that MME receive users equipment sends.
S302：MME sends service request information to MSC according to CSFB call request, and the service request information is used to indicate
MSC determines the CSFB call request for receiving or refusing user equipment.
Specifically, user equipment initiates CS calling services, i.e., send CSFB call request to MME, and MME is receiving user
After the CSFB call request that equipment sends, service request information is sent to MSC by SGs interfaces（Service Request）,
The SGs interfaces are the interfaces communicated between MSC and MME, for the mobile management between CS networks and EPC networks, are sought
Exhale and the business such as sending and receiving short messages；MSC after the service request information is received judges to receive or refuses user equipment
CSFB call request, actually and to carry out the process of flow-control or resource reservation, the i.e. service of differentiation can be high excellent
First level user or business provide higher call completion rate and service quality, in the case where MSC system loadings are higher, often
By the user service first for high priority or reserved some Service Sources, therefore, MSC judges whether to receive user equipment
This CSFB call request, is according to the network of the asked access of the CSFB call request, the ability of MSC itself and MSC
At least one of load these three information of place network is judged that, when system loading is higher, it is low that refusal falls some
The CSFB call request of the user of priority, receives the CSFB call request of high-priority users, it is ensured that some high priorities
The percent of call completed of customer service.
S303：MME receives the service response message that MSC sends.
S304：MME sends a notification message to user equipment according to service response message, so that user equipment is according to the notice
Message determines whether that MSC initiates access request.
Specifically, MSC after the CSFB call request to user equipment judges sends service response to MME and disappears
Breath, MME after the service response message is received, by judging in the title or the service response message of service response message
The parameter of carrying knows judged result, and sends a notification message to user equipment, so that the notice that user equipment is sent according to MME
Message is operated accordingly.The service response message indicates that the mobile switching centre judges to receive the CSFB of the user equipment
During call request, then notification message is used for instruction user equipment to mobile switching centre's initiation access request；Or, the service rings
When answering message to indicate that the mobile switching centre judges the CSFB call request of the refusal user equipment, then notification message is used for
Instruction user equipment does not initiate access request to mobile switching centre.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment according to the service request information, and according to sentencing
Disconnected result sends service response message to mobile management entity so that mobile management entity notifies user according to service response message
Whether equipment send access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or third generation movement is logical
The extra expense of the system brought of access request is initiated to mobile switching centre after letter technical network, the negative of system is reduced
Lotus.
Before the CSFB call request that above-mentioned MME receive users equipment sends, the user equipment accesses Long Term Evolution LTE nets
Network, above-mentioned CSFB call request are used for user equipment requests and access Generation Mobile Telecommunication System network or G mobile communication
Network.
Scene before the CSFB call request that MME receive users equipment sends is that user equipment accesses Long Term Evolution LTE
Network, the i.e. user equipment are the terminals under LTE network, when user equipment carries out CS business, are built with LTE base station first
Vertical connection；Afterwards, LTE base station sends expansion service request to MME（Extended Service Request）So that MME is known
After the user equipment now needs the CS business for carrying out, MME to receive expansion service request, one is sent to LTE base station and responded
Message, indicates LTE base station by the Connection Release set up between user equipment and LTE base station before, and instruction user equipment to
MME sends CSFB call request, to ask to be linked into 2G networks or 3G network, and then carries out CS business.
If above-mentioned judged result is MSC receiving the CSFB call request of user equipment, MME is according to service response message
The parameter carried in title or the service response message knows judged result, and instruction user equipment falls back to 2G networks or 3G network
Backward MSC initiates access request, completes normal calling procedure according to the process of prior art afterwards；If judged result is MSC
The CSFB call request of refusal user equipment, then MME is according to carrying in the title or the service response message of service response message
The judged result known of parameter be CSFB call request that MSC does not receive user equipment, then MME instruction terminals do not fall back to 2G
Or 3G network, and then access request is not sent to MSC, exit the initiation of CS business.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment according to the service request information, and according to sentencing
Disconnected result sends service response message to mobile management entity so that mobile management entity notifies user according to service response message
Whether equipment send access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or third generation movement is logical
The extra expense of the system brought of access request is initiated to mobile switching centre after letter technical network, the negative of system is reduced
Lotus；MSC carries out the judgement of CSFB call request in advance between MME simultaneously, and the user equipment also saved under LTE network is carried out
The time of CS business, improve the efficiency of user equipment CSGB call business.
The signaling process figure of the cut-in method example IV of the circuit domain dropping CSFB that Fig. 4 is provided for the present invention, such as Fig. 4 institutes
Show, the method comprises the steps：
S401：User equipment sends radio resource control to LTE base station（Radio Resource Control, with
Lower abbreviation RRC）Connection request, so that user equipment can send CSFB call request to LTE base station.
S402：LTE base station sends RRC connection establishment responses to user equipment.
S403：LTE base station sends expansion service request message to MME.
S404：MME is asked according to expansion service, sends service request information to MSC.
S405：MSC judges whether to receive the CSFB call request of user equipment according to the service request information, is judged
As a result.
MME sends service request information to MSC, so that according to the service request information, MSC judges whether that receiving user sets
Standby CSFB call request, i.e. MSC are according to the asked network of access of CSFB call request, the self-ability of MSC and MSC institutes
At least one judgement in the load of network receives or refuses the CSFB call request of user equipment, obtains judged result.
S406：MSC sends service response message to MME according to above-mentioned judged result；If service response message indicates that MSC connects
By the CSFB call request of user equipment, then S407 is performed；If the service response message indicates that MSC refuses the CSFB of user equipment
Call request, then perform S409.
S407：According to the service response message, MME indicates that LTE base station allows user equipment to fall back to 2G or 3G network.
After MME receives service response message, initialization connection establishment request can be sent to LTE base station so that LTE can be released
Put user equipment and be connected with the RRC that LTE base station is set up；After above-mentioned RRC Connection Releases, LTE base station instruction user sets
It is standby to fall back to 2G networks or 3G network
S408：User equipment sends access request to MSC.
S409：MME sends a notification message to user equipment, so that user equipment does not initiate access request to MSC.
If the judged result of above-mentioned MSC is no, i.e., above-mentioned service response message is to indicate that MSC refuses the CSFB of user equipment
During call request, MME directly can send a notification message to user equipment so that user equipment does not send access request to MSC, need
It should be noted that be now not need base station controller or radio network controller to participate in, therefore it is extra to also reduce system
Expense.
In method provided in an embodiment of the present invention, service request is sent to mobile switching centre by mobile management entity and is disappeared
Breath, mobile switching centre judge whether to receive the CSFB call request of user equipment according to the service request information, and according to sentencing
Disconnected result sends service response message to mobile management entity so that mobile management entity notifies user according to service response message
Whether equipment send access request to mobile switching centre, it is to avoid user equipment is falling back to the second filial generation or third generation movement is logical
The extra expense of the system brought of access request is initiated to mobile switching centre after letter technical network, the negative of system is reduced
Lotus；MSC carries out the judgement of CSFB call request in advance between MME simultaneously, and the user equipment also saved under LTE network is carried out
The time of CS business, improve the efficiency of user equipment CSGB call business.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of said method embodiment can pass through
Completing, aforesaid program can be stored in a computer read/write memory medium the related hardware of programmed instruction, the program
Upon execution, perform the step of including said method embodiment；And aforesaid storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
The structural representation of mobile switching centre's embodiment one that Fig. 5 is provided for the present invention, as shown in figure 5, the movement is handed over
Switching center9 includes：Receiver module 40, for receiving the service request information of mobile management entity transmission, the service request information is used
In the CSFB call request for indicating mobile switching centre's determination acceptance or refusal user equipment, the service request information is by described
Mobile management entity is sent after the CSFB call request that the user equipment sends is received；Judge module 41, for sentencing
The CSFB call request of user equipment is received or is refused in disconnecting, obtains judged result；Sending module 42, for being tied according to above-mentioned judgement
Fruit sends service response message to mobile management entity, so that above-mentioned mobile management entity is set to user according to service response message
It is standby to send a notification message.
The present embodiments relate to mobile switching centre can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
On the basis of above-mentioned embodiment illustrated in fig. 5, above-mentioned judge module 41 is specifically for asking according to above-mentioned CSFB callings
Ask asked access network, the self-ability of above-mentioned mobile switching centre and above-mentioned mobile switching centre place network it is negative
At least one judgement in lotus receives or refuses the CSFB call request of user equipment；Above-mentioned service response message instruction is above-mentioned to be sentenced
When disconnected module 41 judges to receive the CSFB call request of user equipment, then above-mentioned notification message is used for instruction user equipment to movement
Switching centre initiates access request；Or, above-mentioned service response message indicates that judge module 41 judges refusal user equipment
During CSFB call request, then above-mentioned notification message is used for instruction user equipment not to mobile switching centre's initiation access request.
The structural representation of mobile switching centre's embodiment two that Fig. 6 is provided for the present invention, in above-mentioned embodiment illustrated in fig. 5
On the basis of, the mobile switching centre also includes：First statistical module 43, in sending module 42 according to above-mentioned judged result
After service response message is sent to mobile management entity, CSFB is counted according to above-mentioned judged result and falls initiation number of times after rise, specifically
Statistic procedure is referred to the description of S201.
The present embodiments relate to mobile switching centre can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
Further, on the basis of embodiment illustrated in fig. 6, the mobile switching centre also includes：Second statistical module 44,
After sending service response message to mobile management entity according to above-mentioned judged result in sending module 42, sentenced according to above-mentioned
Disconnected result statistics CSFB falls number of success after rise, and concrete statistic procedure is referred to the description of S202；And also including determining module
45, after number of success being fallen according to mobile switching centre oneself state statistics CSFB in the second statistical module 44, according to
CSFB falls initiation number of times after rise and CSFB falls number of success after rise and determines that the CSFB of user equipment falls success rate after rise；And above-mentioned reception mould
Before the service request information that mobile management entity sends is received, user equipment accesses Long Term Evolution LTE network to block 40, above-mentioned
CSFB call request is used for user equipment requests and accesses Generation Mobile Telecommunication System network or G mobile communication network.
The present embodiments relate to mobile switching centre can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
The structural representation of the mobile management entity embodiment one that Fig. 7 is provided for the present invention, as shown in fig. 7, the moving tube
Reason entity includes：First receiver module 60, for the circuit domain dropping CSFB call request that receive user equipment sends；First
Module 61 is sent, and for according to CSFB call request, service request information being sent to mobile switching centre, the service request information is used
In the CSFB call request for indicating mobile switching centre's determination acceptance or refusal user equipment；Second receiver module 62, for connecing
Receive the service response message that mobile switching centre sends；Second sending module 63, for according to above-mentioned service response message to
Family equipment dispatch order message, so that according to above-mentioned notification message, user equipment determines whether that mobile switching centre initiates to access
Request.
The present embodiments relate to mobile management entity can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
Further, on the basis of above-mentioned embodiment illustrated in fig. 7, above-mentioned service response message indicates mobile switching centre
When judgement receives the CSFB call request of user equipment, then above-mentioned notification message is used for instruction user equipment to mobile switching centre
Initiate access request；Or, above-mentioned service response message indicates that mobile switching centre judges the CSFB callings of refusal user equipment
During request, then above-mentioned notification message is used for instruction user equipment not to mobile switching centre's initiation access request.
Further, on the basis of above-mentioned embodiment illustrated in fig. 7, second receiver module, 63 receive user equipment
Before the CSFB call request of transmission, the user equipment accesses Long Term Evolution LTE network, and above-mentioned CSFB call request is used for user
Device request accesses Generation Mobile Telecommunication System network or G mobile communication network.
The present embodiments relate to mobile management entity can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
The structural representation of mobile switching centre's embodiment three that Fig. 8 is provided for the present invention, as shown in figure 8, the movement is handed over
Switching center9 includes：Receptor 70, for receiving the service request information of mobile management entity transmission, the service request information is used for
Indicate that mobile switching centre determines the CSFB call request for receiving or refusing user equipment, the service request information is by the shifting
Dynamic management entity is sent after the CSFB call request that the user equipment sends is received；Processor 71, for judging to connect
By or refusal user equipment CSFB call request, obtain judged result；Transmitter 72, for according to above-mentioned judged result to shifting
Dynamic management entity sends service response message, so that mobile management entity sends logical to user equipment according to the service response message
Know message.
Optionally, above-mentioned processor 71 is specifically for the network according to the asked access of above-mentioned CSFB call request, movement
At least one judgement in the load of the self-ability and mobile switching centre's place network of switching centre receives or refuses to use
The CSFB call request of family equipment.
Optionally, when the service response message indicates that processor 71 judges to receive the CSFB call request of user equipment,
Then above-mentioned notification message is used for instruction user equipment to mobile switching centre's initiation access request；Or, above-mentioned service response disappears
When breath indicates that processor 71 judges the CSFB call request of the refusal user equipment, then above-mentioned notification message is used for instruction user
Equipment does not initiate access request to mobile switching centre.
Optionally, processor 71 can be also used for being sent to mobile management entity according to judged result in transmitter 72 and service
After response message, CSFB is counted according to above-mentioned judged result and falls initiation number of times after rise.
Optionally, processor 71 can be also used for being sent to mobile management entity according to judged result in transmitter 72 and service
After response message, CSFB is counted according to above-mentioned judged result and falls number of success after rise.
Optionally, processor 71 can be also used for being returned according to mobile switching centre oneself state statistics CSFB in processor 71
After the number of success that falls, initiation number of times is fallen after rise according to CSFB and CSFB falls number of success after rise and determines that the CSFB of the user equipment is returned
Completion power.
Optionally, before the service request information that mobile management entity sends is received, the user equipment connects receptor 70
Enter Long Term Evolution LTE network, above-mentioned CSFB call request is used for user equipment requests and accesses Generation Mobile Telecommunication System network or the
3 g mobile communication technical network.
The present embodiments relate to mobile switching centre can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
The structural representation of the mobile management entity embodiment two that Fig. 9 is provided for the present invention, as shown in figure 9, the moving tube
Reason entity includes：Receptor 80, for the circuit domain dropping CSFB call request that receive user equipment sends, is additionally operable to receive and moves
The service response message that dynamic switching centre sends；Transmitter 81, for according to CSFB call request, sending to mobile switching centre
Service request information, the service request information are used to indicate that mobile switching centre determines acceptance or refuses the user equipment
CSFB call request；It is additionally operable to be sent a notification message to user equipment according to service response message, so that user equipment is according to this
Notification message determines whether that mobile switching centre initiates access request.
Optionally, above-mentioned service response message indicates that mobile switching centre judges to receive the CSFB callings of the user equipment
During request, then above-mentioned notification message is used for instruction user equipment to mobile switching centre's initiation access request；Or, above-mentioned service
When response message indicates that mobile switching centre judges the CSFB call request of refusal user equipment, then above-mentioned notification message is used to refer to
Show that user equipment does not initiate access request to mobile switching centre.
Optionally, before the CSFB call request that 80 receive user equipment of receptor sends, the user equipment accesses long-term
Evolution LTE network, above-mentioned CSFB call request are used for user equipment requests and access Generation Mobile Telecommunication System network or third generation shifting
Dynamic communication technology network.
The present embodiments relate to mobile management entity can perform said method embodiment, which realizes principle and technology
Effect is similar to, and will not be described here.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (14)
1. a kind of cut-in method of circuit domain dropping CSFB, it is characterised in that include：
Mobile switching centre receives the service request information that mobile management entity sends, and the service request information is used to indicate institute
State mobile switching centre and determine the CSFB call request for receiving or refusing user equipment, the service request information is by the movement
Management entity is sent after the CSFB call request that the user equipment sends is received；
The mobile switching centre according to the network of the asked access of the CSFB call request, the mobile switching centre from
At least one judgement in the load of body ability and mobile switching centre place network receives or refuses the user to set
Standby CSFB call request；
The mobile switching centre sends service response message to the mobile management entity according to the judged result, so that institute
State mobile management entity to be sent a notification message to the user equipment according to the service response message；Wherein：
When the service response message indicates that the mobile switching centre judges to receive the CSFB call request of the user equipment,
Then the notification message is used to indicate that the user equipment initiates access request to the mobile switching centre；Or,
When the service response message indicates that the mobile switching centre judges the CSFB call request of the refusal user equipment,
Then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
2. method according to claim 1, it is characterised in that the mobile switching centre is according to the judged result to institute
After stating mobile management entity transmission service response message, also include：
The mobile switching centre counts CSFB according to the judged result and falls initiation number of times after rise.
3. method according to claim 2, it is characterised in that the mobile switching centre is according to the judged result to institute
After stating mobile management entity transmission service response message, also include：
The mobile switching centre counts CSFB according to the judged result and falls number of success after rise.
4. method according to claim 3, it is characterised in that the mobile switching centre is according to the mobile switching centre
After oneself state statistics CSFB falls number of success after rise, also include：
The mobile switching centre falls initiation number of times after rise according to the CSFB and the CSFB falls number of success after rise and determines the use
The CSFB of family equipment falls success rate after rise.
5. the method according to any one of claim 1-4, it is characterised in that the mobile switching centre receives mobile management
Before the service request information that entity sends, the user equipment accesses Long Term Evolution LTE network, and the CSFB call request is used
Generation Mobile Telecommunication System network or G mobile communication network are accessed in the user equipment requests.
6. a kind of cut-in method of circuit domain dropping CSFB, it is characterised in that include：
The circuit domain dropping CSFB call request that mobile management entity receive user equipment sends；
The mobile management entity sends service request information to mobile switching centre according to the CSFB call request, described
Service request information is used to indicate that the mobile switching centre determines the CSFB call request for receiving or refusing the user equipment；
The mobile management entity receives the service response message that the mobile switching centre sends；
The mobile management entity sends a notification message to the user equipment according to the service response message, so that the use
According to the notification message, family equipment determines whether that the mobile switching centre initiates access request, wherein：
When the service response message indicates that the mobile switching centre judges to receive the CSFB call request of the user equipment,
Then the notification message is used to indicate that the user equipment initiates access request to the mobile switching centre；Or,
When the service response message indicates that the mobile switching centre judges the CSFB call request of the refusal user equipment,
Then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
7. method according to claim 6, it is characterised in that the mobile management entity receives the user equipment and sends
The CSFB call request before, the user equipment accesses Long Term Evolution LTE network, and the CSFB call request is used for institute
State user equipment requests and access Generation Mobile Telecommunication System network or G mobile communication network.
8. a kind of mobile switching centre, it is characterised in that include：
Receiver module, for receiving the service request information of mobile management entity transmission, the service request information is used to indicate
The mobile switching centre determines the CSFB call request for receiving or refusing user equipment, and the service request information is by the shifting
Dynamic management entity is sent after the CSFB call request that the user equipment sends is received；
Judge module, for the network according to the asked access of the CSFB call request, the mobile switching centre itself
At least one judgement in the load of ability and mobile switching centre place network receives or refuses the user equipment
CSFB call request；
Sending module, for sending service response message to the mobile management entity according to the judged result, so that described
Mobile management entity sends a notification message to the user equipment according to the service response message；Wherein：
When the service response message indicates that the judge module judges to receive the CSFB call request of the user equipment, then institute
State notification message and indicate that the user equipment initiates access request to the mobile switching centre；Or,
When the service response message indicates that the judge module judges the CSFB call request of the refusal user equipment, then institute
State notification message and indicate that the user equipment does not initiate access request to the mobile switching centre.
9. mobile switching centre according to claim 8, it is characterised in that the mobile switching centre also includes：
First statistical module, services for being sent to the mobile management entity according to the judged result in the sending module
After response message, CSFB is counted according to the judged result and falls initiation number of times after rise.
10. mobile switching centre according to claim 9, it is characterised in that the mobile switching centre also includes：
Second statistical module, services for being sent to the mobile management entity according to the judged result in the sending module
After response message, CSFB is counted according to the judged result and falls number of success after rise.
11. mobile switching centres according to claim 10, it is characterised in that the mobile switching centre also includes：
Determining module, falls after rise into for counting CSFB according to mobile switching centre's oneself state in second statistical module
After work(number of times, initiation number of times is fallen after rise according to the CSFB and the CSFB falls number of success after rise and determines the user equipment
CSFB falls success rate after rise.
12. mobile switching centres according to any one of claim 9-11, it is characterised in that the receiver module is received and moved
Before the service request information that dynamic management entity sends, the user equipment accesses Long Term Evolution LTE network, the CSFB callings
Ask to access Generation Mobile Telecommunication System network or G mobile communication network for the user equipment requests.
13. a kind of mobile management entities, it is characterised in that include：
First receiver module, for the circuit domain dropping CSFB call request that receive user equipment sends；
First sending module, it is for according to the CSFB call request, sending service request information to mobile switching centre, described
Service request information is used to indicate that the mobile switching centre determines the CSFB call request for receiving or refusing the user equipment；
Second receiver module, for receiving the service response message that the mobile switching centre sends；
Second sending module, for being sent a notification message to the user equipment according to the service response message, so that described
According to the notification message, user equipment determines whether that the mobile switching centre initiates access request；Wherein：
When the service response message indicates that the mobile switching centre judges to receive the CSFB call request of the user equipment,
Then the notification message is used to indicate that the user equipment initiates access request to the mobile switching centre；Or,
When the service response message indicates that the mobile switching centre judges the CSFB call request of the refusal user equipment,
Then the notification message is used to indicate that the user equipment does not initiate access request to the mobile switching centre.
14. mobile management entities according to claim 13, it is characterised in that second receiver module receives the use
Before the CSFB call request that family equipment sends, the user equipment accesses Long Term Evolution LTE network, the CSFB callings
Ask to access Generation Mobile Telecommunication System network or G mobile communication network for the user equipment requests.
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| CN2013077670 | 2013-06-21 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017532856A (en) * | 2014-09-18 | 2017-11-02 | インテル コーポレイション | Suspend extended service request procedure |
| WO2016082187A1 (en) * | 2014-11-28 | 2016-06-02 | 宇龙计算机通信科技(深圳)有限公司 | Terminal, mobility management entity, mobile switching center, and service processing method and system |
| CN108966299B (en) * | 2014-12-08 | 2021-02-23 | 华为技术有限公司 | Voice switching method and device |
| WO2016106562A1 (en) * | 2014-12-30 | 2016-07-07 | 华为技术有限公司 | Circuit switched fallback method, device and system |
| CN108464038B (en) * | 2016-11-25 | 2020-03-10 | 华为技术有限公司 | Circuit domain fallback method, base station, mobile management entity and terminal |
| CN110113791B (en) * | 2019-05-09 | 2021-08-13 | 中国联合网络通信集团有限公司 | Mobile terminal and method for falling back to cell |
| CN110324816B (en) * | 2019-07-11 | 2022-03-25 | 中国联合网络通信集团有限公司 | CSFB calling method, system and mobile terminal |
| CN115209487A (en) * | 2021-03-25 | 2022-10-18 | 中国移动通信有限公司研究院 | Voice fallback processing method and device and terminal |
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