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
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- switching center
- user equipment
- mobile switching
- csfb
- request
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000010295 mobile communication Methods 0.000 claims description 37
- 230000000977 initiatory effect Effects 0.000 claims description 26
- 238000005516 engineering process Methods 0.000 claims description 25
- 230000007774 longterm Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
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 the field of communications technologies, and in particular, to an access method, a mobility management entity, and a mobile switching center for circuit switched fallback CSFB.
Background
With the development of mobile communication technology, mobile networks gradually evolve from the initial second generation mobile communication technology (2G) network to the currently popular Long Term Evolution (LTE) network, in order to enable a terminal to initiate Circuit Switching (CS) service such as voice service and receive paging of the CS service when accessing an LTE network, and can correctly process the Packet Switching (PS) service which is currently performed by the terminal in the LTE network, and generate a Circuit Switched Fallback (CSFB) technology, that is, when the terminal covered by LTE is processing voice service, the terminal first falls back to the CS network, and voice service is carried out under the CS network, so that the aim of reusing the existing CS network equipment to provide voice service for users in the LTE network is achieved.
In the prior art, when a terminal initiates a voice service call to a Mobility Management Entity (MME) in an LTE network, generally, an LTE base station sends an extended service Request (extended service Request) to the MME, so that the MME knows that the terminal needs to perform a CS service, and the MME further instructs the terminal to fall back to a 2G/3G network, and initiates an access Request to a Mobile Switching Center (MSC) after the terminal falls back to the 2G/3G network, and the MSC determines whether to allow the UE to initiate the CS service according to a priority of a user and a system load state of the MSC.
However, in the prior art, in the process of initiating the CS service after the terminal falls back to 2G/3G, the terminal often needs to be involved in processing by an LTE base station, a base station controller, and the like, so that the load overhead of the system is large.
Disclosure of Invention
The embodiment of the invention provides an access method of a Circuit Switched Fallback (CSFB), a mobile management entity and a mobile switching center, which solve the technical problem of high system load overhead caused by participation of an LTE base station and a base station controller in the process of initiating a CS service after a terminal falls back to a 2G or 3G network from the LTE network in the prior art.
A first aspect of an embodiment of the present invention provides an access method for a circuit switched fallback CSFB, including:
a mobile switching center receives a service request message sent by a mobility management entity, wherein the service request message is used for indicating the mobile switching center to determine to accept or reject a CSFB call request of user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment;
the mobile switching center judges whether to accept or reject the CSFB call request of the user equipment to obtain a judgment result;
and the mobile switching center sends a service response message to the mobile management entity according to the judgment 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 first aspect, in a first possible implementation manner of the first aspect, the determining, by the mobile switching center, to accept or reject the CSFB call request of the user equipment includes:
the mobile switching center judges to accept or reject the CSFB call request of the user equipment according to at least one of the network requested to be accessed by the CSFB call request, the self-capability of the mobile switching center and the load of the network where the mobile switching center is located.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the service response message indicates that the mobile switching center determines to accept the CSFB call request of the user equipment, the notification message is used to instruct the user equipment to initiate an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, after the sending, by the mobile switching center, the service response message to the mobility management entity according to the determination result, the method further includes:
and the mobile switching center counts the CSFB fallback initiating times according to the judgment result.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, after the sending, by the mobile switching center, the service response message to the mobility management entity according to the determination result, the method further includes:
and the mobile switching center counts the CSFB falling success times according to the judgment result.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, after the counting, by the mobile switching center, the number of times of CSFB fallback success times according to the self state of the mobile switching center, the method further includes:
and the mobile switching center determines the CSFB fallback success rate of the user equipment according to the CSFB fallback initiation times and the CSFB fallback success times.
With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, before the mobile switching center receives a service request message sent by a mobility management entity, the ue accesses a long term evolution LTE network, and the CSFB call request is used for the ue to request access to a second generation mobile communication network or a third generation mobile communication technology network.
A second aspect of the embodiments of the present invention provides an access method for a circuit switched fallback CSFB, including:
a mobile management entity receives a Circuit Switched Fallback (CSFB) call request sent by user equipment;
the mobile management entity sends a service request message to a mobile switching center according to the CSFB call request, wherein the service request message is used for indicating the mobile switching center to determine to accept or reject the CSFB call request of the user equipment;
the mobile management entity receives a service response message sent by the mobile switching center;
and the mobile management entity sends a notification message to the user equipment according to the service response message, so that the user equipment determines whether to initiate an access request to the mobile switching center according to the notification message.
With reference to the second aspect, in a first possible implementation manner of the second aspect, when the service response message indicates that the mobile switching center determines to accept the CSFB call request of the user equipment, the notification message is used to indicate that the user equipment initiates an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, before the mobility management entity receives the CSFB call request sent by the user equipment, the user equipment accesses a long term evolution LTE network, and the CSFB call request is used for the user equipment to request to access a second generation mobile communication network or a third generation mobile communication technology network.
A third aspect of the embodiments of the present invention provides a mobile switching center, including:
a receiving module, configured to receive a service request message sent by a mobility management entity, where the service request message is used to instruct a mobile switching center to determine to accept or reject a CSFB call request of a user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment;
the judging module is used for judging whether to accept or reject the CSFB call request of the user equipment to obtain a judging result;
and the sending module is used for sending a service response message to the mobile management entity according to the judgment 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 a first possible implementation manner of the third aspect, the determining module is specifically configured to determine to accept or reject the CSFB call request of the user equipment according to at least one of a network to which the CSFB call request requests to access, a capability of the mobile switching center, and a load of a network in which the mobile switching center is located.
With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, when the service response message indicates that the determination module determines to accept the CSFB call request of the user equipment, the notification message is used to instruct the user equipment to initiate an access request to the mobile switching center; or,
the service response message indicates that the judging module judges that the CSFB call request of the user equipment is rejected, and the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
With reference to any one of the third aspect to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the mobile switching center further includes:
and the first counting module is used for counting the CSFB fallback initiating times according to the judgment result after the sending module sends the service response message to the mobile management entity according to the judgment result.
With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the mobile switching center further includes:
and the second counting module is used for counting the CSFB fallback success times according to the judgment result after the sending module sends the service response message to the mobile management entity according to the judgment result.
With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the mobile switching center further includes:
a determining module, configured to determine, after the second counting module counts the number of times of CSFB fallback success according to the self state of the mobile switching center, the CSFB fallback success rate of the user equipment according to the number of times of CSFB fallback initiation and the number of times of CSFB fallback success.
With reference to any one of the third to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, before the receiving module receives a service request message sent by a mobility management entity, the ue accesses the long term evolution LTE network, and the CSFB call request is used for the ue to request to access the second generation mobile communication network or the third generation mobile communication technology network.
A fourth aspect of the present invention provides a mobility management entity, including:
a first receiving module, configured to receive a circuit switched fallback CSFB call request sent by a user equipment;
a first sending module, configured to send a service request message to a mobile switching center according to the CSFB call request, where the service request message is used to instruct the mobile switching center to determine to accept or reject the CSFB call request of the user equipment;
a second receiving module, configured to receive a service response message sent by the mobile switching center;
and a second sending module, configured to send a notification message to the ue according to the service response message, so that the ue determines whether to initiate an access request to the mobile switching center according to the notification message.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, when the service response message indicates that the mobile switching center determines to accept the CSFB call request of the user equipment, the notification message is used to indicate that the user equipment initiates an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, before the second receiving module receives the CSFB call request sent by the user equipment, the user equipment accesses a long term evolution LTE network, and the CSFB call request is used for the user equipment to request to access a second generation mobile communication network or a third generation mobile communication technology network.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center judges whether to accept the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the judgment result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the load of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a first embodiment of an access method for a circuit switched fallback CSFB provided in the present invention;
fig. 2 is a flowchart illustrating a second embodiment of an access method for a circuit switched fallback CSFB according to the present invention;
fig. 3 is a flowchart illustrating a third embodiment of an access method for a circuit switched fallback CSFB provided in the present invention;
fig. 4 is a signaling flowchart of a fourth embodiment of an access method of a circuit switched fallback CSFB provided by the present invention;
fig. 5 is a schematic structural diagram of a first embodiment of a mobile switching center according to the present invention;
fig. 6 is a schematic structural diagram of a second embodiment of a mobile switching center according to the present invention;
fig. 7 is a schematic structural diagram of a first embodiment of a mobility management entity according to the present invention;
fig. 8 is a schematic structural diagram of a third embodiment of a mobile switching center according to the present invention;
fig. 9 is a schematic structural diagram of a second embodiment of a mobility management entity according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The techniques described herein may be used in various communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Orthogonal Frequency-Division Multiple Access (SC-FDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE, Long Term Evolution), and other such communication systems.
A terminal, i.e. a user equipment, referred to in this application may be a wireless terminal or a wired terminal, a wireless terminal may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a radio access Network (e.g., RAN). For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (RemoteStation), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Device (User Device), or a User Equipment (User Equipment).
A base station (e.g., access point) referred to in this application may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be an AP of a wireless local area network WLAN, a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, which is not limited in this application.
Fig. 1 is a flowchart illustrating a first embodiment of an access method for circuit switched fallback CSFB provided by the present invention, where an execution main body of the method according to the embodiment of the present invention is an MSC, and as shown in fig. 1, the method includes:
s101: the MSC receives a service request message sent by the MME, wherein the service request message is used for indicating the MSC to determine to accept or reject the CSFB call request of the user equipment, and the service request message is sent by the MME after receiving the CSFB call request sent by the user equipment.
Specifically, the service request message itself may indicate that the MSC determines to accept or reject the CSFB call request of the ue, that is, the MSC may know that it needs to start determining whether to accept the CSFB call request of the ue when receiving the service request message.
S102: MSC judges whether to accept or reject CSFB call request of user equipment, and obtains judgment result.
Specifically, the user equipment initiates a CS calling Service, that is, sends a CSFB call Request to an MME, and after receiving the CSFB call Request sent by the user equipment, the MME sends a Service Request message (Service Request) to the MSC through an SGs interface, where the SGs interface is an interface for performing communication between the MSC and the MME and is used for services such as mobility management, paging, and short message transmission and reception between a CS network and an Evolved Packet Core (EPC); after receiving the service request message, the MSC determines whether to accept or reject the CSFB call request of the user equipment, and obtains a determination result.
S103: and the MSC sends a service response message to the MME according to the judgment result so that the MME sends a notification message to the user equipment according to the service response message.
Specifically, the MSC sends a service response message to the MME according to the determination result, and after receiving the service response message, the MME obtains the determination result by determining the name of the service response message or a parameter carried in the service response message, and sends a notification message to the user equipment, so that the user equipment performs a corresponding operation according to the notification message sent by the MME, that is, the problem of additional overhead of the system caused by the fact that the user equipment falls back to the 2G/3G network and initiates an access request to the mobile switching center and the access request is rejected by the mobile switching center without knowing the determination result of the mobile switching center is avoided.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center determines whether to accept the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the determination result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the system load.
In the above embodiment shown in fig. 1, S102 may include: the MSC judges whether to accept or reject the CSFB call request of the user equipment according to at least one of the network requested to be accessed by the CSFB call request, the self-capability of the MSC and the load of the network where the MSC is located; when the service response message indicates the MSC to accept the CSFB call request of the user equipment, the notification message indicates the user equipment to initiate an access request to the MSC; or, when the service response message indicates that the MSC rejects the CSFB call request of the user equipment, the notification message indicates that the user equipment does not initiate an access request to the MSC.
It should be noted that, in embodiment 1, before receiving the service request message sent by the MME, the MSC accesses the LTE network, that is, the user equipment is a terminal in the LTE network, and when the user equipment performs a CS service, the MSC first establishes a connection with the LTE base station; then, the LTE base station sends an extended service Request (extended service Request) to the MME so that the MME knows the CS service that the ue needs to perform at this time, and after receiving the extended service Request, the MME sends a response message to the LTE base station, which indicates the LTE base station to release the connection established between the ue and the LTE base station before, and indicates the ue to send a CSFB call Request to the MME to Request to access to a Second Generation mobile communication technology (Second Generation, hereinafter referred to as 2G) network or a Third Generation mobile communication technology (Third Generation, hereinafter referred to as 3G) network, so as to perform the CS service, where the CSFB call Request is used for the ue to Request to access to the 2G network or the 3G network.
In the above process, the MSC determines whether to accept the CSFB call request of the ue, and actually performs a flow control or resource reservation process, that is, the differentiated service may provide higher service access rate and service quality for a high-priority user or service, and under the condition that the system load of the MSC is higher, the MSC often serves the high-priority user or reserves some service resources first, so that the MSC determines whether to accept the CSFB call request of the ue at this time, and determines according to at least one of the network requested to be accessed by the CSFB call request, the capability of the MSC itself, and the load of the network where the MSC is located, and when the system load is higher, the MSC rejects some CSFB call requests of low-priority users, accepts the CSFB call request of the high-priority user, and ensures the access rate of some high-priority user services.
In the above process, if the judgment result is that the MSC accepts the CSFB call request of the user equipment, the MME learns the judgment result according to the name of the service response message or the parameter carried in the service response message, instructs the user equipment to drop back to the 2G network or the 3G network and then initiates an access request to the MSC, and then completes a normal calling flow according to the processing of the prior art; if the judgment result is that the MSC rejects the CSFB call request of the user equipment, the MME indicates that the terminal does not fall back to the 2G or 3G network according to the judgment result obtained by the name of the service response message or the parameter carried in the service response message that the MSC does not accept the CSFB call request of the user equipment, and further does not send an access request to the MSC, and exits the initiation of the CS service, that is, the MSC rejects the CSFB call request of the user equipment in advance, without requiring the participation of a base station controller in the 3G network as in the prior art.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center judges whether to receive the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the judgment result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the load of the system; meanwhile, the MSC judges the CSFB call request with the MME in advance, so that the time of the CS service of the user equipment in the LTE network is saved, and the CSFB call service efficiency of the user equipment is improved.
Fig. 2 is a schematic flow diagram of a second embodiment of the access method for circuit switched fallback CSFB provided in the present invention, where on the basis of the above embodiment, after step S103, the method further includes an implementation method for accurately calculating a fallback success rate, and includes the following steps:
s201: and the MSC counts the CSFB fallback initiating times according to the judgment result.
Specifically, after the MSC sends the service response message to the MME according to the determination result, the number of CSFB fallback initiation times is also counted according to the determination result; if MSC accepts CSFB call request of user equipment, adding 1 on the basis of last counting CSFB fallback initiation times; if the MSC rejects the CSFB call request of the ue, the number of CSFB fallback initiations is counted after the service response is sent to the MME, where the counted number of CSFB fallback initiations is not increased by 1 on the basis of the last counting, but continues to use the counted number of CSFB fallback initiations.
On the basis of the embodiment shown in fig. 2, after S201, the method further includes a method for determining the number of successful fallback times, including the following steps:
s202: and the MSC counts the CSFB falling success times according to the judgment result.
The CSFB fallback success number may be counted according to the following counting manner, if the determination result of S102 is that the MSC receives a CSFB call request of the user equipment, and the MSC receives an access request of the user equipment from the 2G network or the 3G network or receives a cancel local (cancel Location) message of a Home Location Register (hereinafter, referred to as HLR), then 1 is added on the basis of the last counting of the CSFB fallback success number; if the determination result of S102 is that the MSC rejects the CSFB call request of the ue, the last counted CSFB fallback success number is not added with 1, but continues to be used.
S203: the MSC determines the CSFB fallback success rate of the user equipment according to the CSFB fallback initiation times and the CSFB fallback success times.
The fallback success rate can be determined by dividing the CSFB fallback success rate obtained in S202 by the CSFB fallback initiation rate obtained in S201.
In the method provided by the embodiment of the invention, the MSC counts the CSFB fallback success frequency and the CSFB fallback initiation frequency according to the service response message, so as to determine the fallback success rate, improve the accuracy of the calculation of the fallback success rate, and enable system maintenance personnel to judge whether the system normally operates more accurately according to the fallback success rate.
Fig. 3 is a flowchart illustrating a third embodiment of an access method for a circuit switched fallback CSFB provided by the present invention, where the method according to the embodiment of the present invention is a mobility management entity, and as shown in fig. 3, the method includes:
s301: and the MME receives the CSFB call request sent by the user equipment.
S302: and the MME sends a service request message to the MSC according to the CSFB call request, wherein the service request message is used for indicating the MSC to determine to accept or reject the CSFB call request of the user equipment.
Specifically, the user equipment initiates a CS calling Service, that is, sends a CSFB call Request to the MME, and after receiving the CSFB call Request sent by the user equipment, the MME sends a Service Request message (Service Request) to the MSC through an SGs interface, where the SGs interface is an interface for performing communication between the MSC and the MME and is used for services such as mobility management, paging, short message transmission and reception between the CS network and the EPC network; after receiving the service request message, the MSC determines whether to accept or reject the CSFB call request of the ue, which is actually a process of performing flow control or resource reservation, i.e. differentiated services may provide higher traffic access rate and quality of service for high priority users or traffic, in the case of a high MSC system load, it is often desirable to provide a service to the high priority users by first serving or reserving some service resources, therefore, the MSC judges whether to accept the CSFB call request of the user equipment at this time according to at least one of the three information of the network requested to be accessed by the CSFB call request, the capability of the MSC and the load of the network where the MSC is located, when the system load is relatively high, rejecting CSFB call requests of some low-priority users, accepting CSFB call requests of high-priority users, and ensuring the call completing rate of some high-priority user services.
S303: and the MME receives a service response message sent by the MSC.
S304: and the MME sends a notification message to the user equipment according to the service response message so that the user equipment determines whether to initiate an access request to the MSC according to the notification message.
Specifically, after determining a CSFB call request of the user equipment, the MSC sends a service response message to the MME, and after receiving the service response message, the MME obtains a determination result by determining a name of the service response message or a parameter carried in the service response message, and sends a notification message to the user equipment, so that the user equipment performs a corresponding operation according to the notification message sent by the MME. The service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is accepted, and the notification message is used for indicating the user equipment to initiate an access request to the mobile switching center; or, when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used to indicate that the user equipment does not initiate an access request to the mobile switching center.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center judges whether to accept the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the judgment result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the load of the system.
Before the MME receives a CSFB call request sent by a user equipment, the user equipment accesses a long term evolution LTE network, and the CSFB call request is used for the user equipment to request to access a second generation mobile communication network or a third generation mobile communication technology network.
The scene before the MME receives the CSFB call request sent by the user equipment is that the user equipment is accessed to a Long Term Evolution (LTE) network, namely the user equipment is a terminal in the LTE network, and when the user equipment carries out CS service, connection is firstly established with an LTE base station; then, the LTE base station sends an Extended Service Request (Extended Service Request) to the MME so that the MME knows the CS Service that the ue needs to perform at this time, and after receiving the Extended Service Request, the MME sends a response message to the LTE base station to instruct the LTE base station to release the connection established between the ue and the LTE base station, and instructs the ue to send a CSFB call Request to the MME to Request to access to the 2G network or the 3G network, thereby performing the CS Service.
If the judging result is that the MSC accepts the CSFB call request of the user equipment, the MME acquires the judging result according to the name of the service response message or the parameter carried in the service response message, instructs the user equipment to drop back to the 2G network or the 3G network and then sends an access request to the MSC, and then completes a normal calling process according to the processing of the prior art; if the judging result is that the MSC rejects the CSFB call request of the user equipment, the MME indicates that the MSC does not accept the CSFB call request of the user equipment according to the name of the service response message or the judging result obtained by the parameters carried in the service response message, and the MME indicates that the terminal does not fall back to the 2G or 3G network, further does not send an access request to the MSC, and exits the initiation of the CS service.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center judges whether to receive the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the judgment result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the load of the system; meanwhile, the MSC judges the CSFB call request with the MME in advance, so that the time of the CS service of the user equipment in the LTE network is saved, and the CSGB call service efficiency of the user equipment is improved.
Fig. 4 is a signaling flowchart of a fourth embodiment of an access method for a circuit switched fallback CSFB, as shown in fig. 4, the method includes the following steps:
s401: the user equipment sends a Radio Resource Control (RRC) connection request to the LTE base station, so that the user equipment can send a CSFB call request to the LTE base station.
S402: the LTE base station sends an RRC connection establishment response to the user equipment.
S403: the LTE base station sends an extended service request message to the MME.
S404: and the MME sends a service request message to the MSC according to the extended service request.
S405: the MSC judges whether to accept the CSFB call request of the user equipment according to the service request message to obtain a judgment result.
The MME sends a service request message to the MSC so that the MSC judges whether to accept the CSFB call request of the user equipment according to the service request message, namely the MSC judges whether to accept or reject the CSFB call request of the user equipment according to at least one of a network requested to be accessed by the CSFB call request, the self-capability of the MSC and the load of the network where the MSC is located, and a judgment result is obtained.
S406: the MSC sends a service response message to the MME according to the judgment result; if the service response message indicates that the MSC accepts the CSFB call request of the user equipment, S407 is performed; if the service response message indicates that the MSC rejects the CSFB call request of the user equipment, S409 is performed.
S407: and the MME instructs the LTE base station to drop the user equipment to the 2G or 3G network according to the service response message.
After receiving the service response message, the MME sends an initialization connection establishment request to the LTE base station, so that the LTE can release the RRC connection established between the user equipment and the LTE base station; after the RRC connection release, the LTE base station instructs the user equipment to fall back to the 2G network or the 3G network
S408: the user equipment sends an access request to the MSC.
S409: the MME sends a notification message to the user equipment so that the user equipment does not initiate an access request to the MSC.
If the determination result of the MSC is negative, that is, the service response message indicates that the MSC rejects the CSFB call request of the user equipment, the MME directly sends a notification message to the user equipment, so that the user equipment does not send an access request to the MSC, and it should be noted that a base station controller or a radio network controller is not needed at this time, thereby reducing additional overhead of the system.
In the method provided by the embodiment of the invention, the mobile management entity sends the service request message to the mobile switching center, and the mobile switching center judges whether to receive the CSFB call request of the user equipment according to the service request message and sends the service response message to the mobile management entity according to the judgment result, so that the mobile management entity informs the user equipment whether to send the access request to the mobile switching center according to the service response message, thereby avoiding the extra system overhead caused by the fact that the user equipment initiates the access request to the mobile switching center after falling back to the second generation or third generation mobile communication technology network and reducing the load of the system; meanwhile, the MSC judges the CSFB call request with the MME in advance, so that the time of the CS service of the user equipment in the LTE network is saved, and the CSGB call service efficiency of the user equipment is improved.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Fig. 5 is a schematic structural diagram of a mobile switching center according to a first embodiment of the present invention, and as shown in fig. 5, the mobile switching center includes: a receiving module 40, configured to receive a service request message sent by a mobility management entity, where the service request message is used to instruct a mobile switching center to determine to accept or reject a CSFB call request of a user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment; the determining module 41 is configured to determine to accept or reject the CSFB call request of the user equipment, so as to obtain a determination result; a sending module 42, configured to send a service response message to the mobility management entity according to the determination result, so that the mobility management entity sends a notification message to the ue according to the service response message.
The mobile switching center according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Based on the embodiment shown in fig. 5, the determining module 41 is specifically configured to determine to accept or reject the CSFB call request of the ue according to at least one of a network requested to be accessed by the CSFB call request, the self-capability of the mobile switching center, and a load of the network where the mobile switching center is located; when the service response message indicates that the determining module 41 determines to accept the CSFB call request of the ue, the notification message is used to indicate the ue to initiate an access request to the msc; or, when the service response message instruction determining module 41 determines to reject the CSFB call request of the ue, the notification message is used to instruct the ue not to initiate an access request to the msc.
Fig. 6 is a schematic structural diagram of a second embodiment of a mobile switching center provided in the present invention, and based on the embodiment shown in fig. 5, the mobile switching center further includes: the first counting module 43 is configured to count the CSFB fallback initiation times according to the determination result after the sending module 42 sends the service response message to the mobility management entity according to the determination result, and the specific counting step may refer to the description of S201.
The mobile switching center according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Further, on the basis of the embodiment shown in fig. 6, the mobile switching center further includes: a second counting module 44, configured to count, according to the determination result, the number of CSFB fallback success times after the sending module 42 sends the service response message to the mobility management entity according to the determination result, where the specific counting step may refer to the description of S202; the system further includes a determining module 45, configured to determine, after the second counting module 44 counts the number of times of successful CSFB fallback according to the self state of the mobile switching center, a CSFB fallback success rate of the user equipment according to the number of times of initiation of CSFB fallback and the number of times of successful CSFB fallback; and before receiving the service request message sent by the mobility management entity, the receiving module 40 accesses the long term evolution LTE network, and the CSFB call request is used for the ue to request to access the second generation mobile communication network or the third generation mobile communication technology network.
The mobile switching center according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 7 is a schematic structural diagram of a mobility management entity according to a first embodiment of the present invention, as shown in fig. 7, the mobility management entity includes: a first receiving module 60, configured to receive a circuit switched fallback CSFB call request sent by a user equipment; a first sending module 61, configured to send a service request message to the mobile switching center according to the CSFB call request, where the service request message is used to instruct the mobile switching center to determine to accept or reject the CSFB call request of the user equipment; a second receiving module 62, configured to receive a service response message sent by the mobile switching center; a second sending module 63, configured to send a notification message to the user equipment according to the service response message, so that the user equipment determines whether to initiate an access request to the mobile switching center according to the notification message.
The mobility management entity according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Further, on the basis of the embodiment shown in fig. 7, when the service response message indicates that the mobile switching center determines to accept the CSFB call request of the user equipment, the notification message is used to indicate the user equipment to initiate an access request to the mobile switching center; or, when the service response message indicates the mobile switching center to determine to reject the CSFB call request of the user equipment, the notification message is used to indicate that the user equipment does not initiate an access request to the mobile switching center.
Further, on the basis of the embodiment shown in fig. 7, before the second receiving module 63 receives a CSFB call request sent by the ue, the ue accesses the LTE network, where the CSFB call request is used for the ue to request to access the second generation mobile communication network or the third generation mobile communication technology network.
The mobility management entity according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 8 is a schematic structural diagram of a third embodiment of a mobile switching center provided in the present invention, and as shown in fig. 8, the mobile switching center includes: a receiver 70, configured to receive a service request message sent by a mobility management entity, where the service request message is used to instruct a mobile switching center to determine to accept or reject a CSFB call request of a user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment; the processor 71 is configured to determine to accept or reject the CSFB call request of the user equipment, so as to obtain a determination result; a transmitter 72, configured to send a service response message to the mobility management entity according to the determination result, so that the mobility management entity sends a notification message to the user equipment according to the service response message.
Optionally, the processor 71 is specifically configured to determine to accept or reject the CSFB call request of the user equipment according to at least one of a network requested to be accessed by the CSFB call request, a capability of the mobile switching center, and a load of the network where the mobile switching center is located.
Optionally, when the service response message instructs the processor 71 to determine to accept the CSFB call request of the user equipment, the notification message is used to instruct the user equipment to initiate an access request to the mobile switching center; or, when the service response message instructing processor 71 determines to reject the CSFB call request of the ue, the notification message is used to instruct the ue not to initiate an access request to the msc.
Optionally, the processor 71 may be further configured to count the CSFB fallback initiation times according to the determination result after the transmitter 72 sends the service response message to the mobility management entity according to the determination result.
Optionally, the processor 71 may be further configured to count the number of CSFB fallback success times according to the determination result after the transmitter 72 transmits the service response message to the mobility management entity according to the determination result.
Optionally, the processor 71 may be further configured to determine, after the processor 71 counts the number of times of successful CSFB fallback according to the self state of the mobile switching center, the success rate of CSFB fallback of the user equipment according to the number of times of initiation of CSFB fallback and the number of times of successful CSFB fallback.
Optionally, the receiver 70 accesses the LTE network before receiving the service request message sent by the mobility management entity, where the CSFB call request is used for the ue to request to access the second generation mobile communication network or the third generation mobile communication technology network.
The mobile switching center according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 9 is a schematic structural diagram of a second embodiment of a mobility management entity provided in the present invention, and as shown in fig. 9, the mobility management entity includes: a receiver 80, configured to receive a circuit switched fallback CSFB call request sent by a user equipment, and further configured to receive a service response message sent by a mobile switching center; a transmitter 81, configured to send a service request message to a mobile switching center according to the CSFB call request, where the service request message is used to instruct the mobile switching center to determine to accept or reject the CSFB call request of the user equipment; and the mobile switching center is further used for sending a notification message to the user equipment according to the service response message so that the user equipment determines whether to initiate an access request to the mobile switching center according to the notification message.
Optionally, when the service response message indicates that the mobile switching center determines to accept the CSFB call request of the user equipment, the notification message is used to indicate the user equipment to initiate an access request to the mobile switching center; or, when the service response message indicates the mobile switching center to determine to reject the CSFB call request of the user equipment, the notification message is used to indicate that the user equipment does not initiate an access request to the mobile switching center.
Optionally, before the receiver 80 receives a CSFB call request sent by the ue, the ue accesses the LTE network, where the CSFB call request is used for the ue to request to access the second generation mobile communication network or the third generation mobile communication technology network.
The mobility management entity according to the embodiment of the present invention may implement the above method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. An access method for Circuit Switched Fallback (CSFB), comprising:
a mobile switching center receives a service request message sent by a mobility management entity, wherein the service request message is used for indicating the mobile switching center to determine to accept or reject a CSFB call request of user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment;
the mobile switching center judges to accept or reject the CSFB call request of the user equipment according to at least one of the network requested to be accessed by the CSFB call request, the self-capability of the mobile switching center and the load of the network where the mobile switching center is located;
the mobile switching center sends a service response message to the mobile management entity according to the judgment result so that the mobile management entity sends a notification message to the user equipment according to the service response message; wherein:
when the service response message indicates the mobile switching center to judge to accept the CSFB call request of the user equipment, the notification message is used for indicating the user equipment to initiate an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
2. The method of claim 1, wherein after the mobile switching center sends a service response message to the mobility management entity according to the determination result, the method further comprises:
and the mobile switching center counts the CSFB fallback initiating times according to the judgment result.
3. The method of claim 2, wherein after the mobile switching center sends a service response message to the mobility management entity according to the determination result, the method further comprises:
and the mobile switching center counts the CSFB falling success times according to the judgment result.
4. The method according to claim 3, wherein the mobile switching center counts the number of successful CSFB fallback according to the status of the mobile switching center itself, and further comprising:
and the mobile switching center determines the CSFB fallback success rate of the user equipment according to the CSFB fallback initiation times and the CSFB fallback success times.
5. The method according to any of claims 1-4, wherein the mobile switching center accesses a long term evolution, LTE, network before receiving a service request message sent by a mobility management entity, and wherein the CSFB call request is for the user equipment to request access to a second generation mobile communication network or a third generation mobile communication technology network.
6. An access method for Circuit Switched Fallback (CSFB), comprising:
a mobile management entity receives a Circuit Switched Fallback (CSFB) call request sent by user equipment;
the mobile management entity sends a service request message to a mobile switching center according to the CSFB call request, wherein the service request message is used for indicating the mobile switching center to determine to accept or reject the CSFB call request of the user equipment;
the mobile management entity receives a service response message sent by the mobile switching center;
the mobility management entity sends a notification message to the user equipment according to the service response message, so that the user equipment determines whether to initiate an access request to the mobile switching center according to the notification message, wherein:
when the service response message indicates the mobile switching center to judge to accept the CSFB call request of the user equipment, the notification message is used for indicating the user equipment to initiate an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
7. The method of claim 6, wherein before the mobility management entity receives the CSFB call request sent by the UE, the UE accesses a Long Term Evolution (LTE) network, and wherein the CSFB call request is used for the UE to request access to a second generation mobile communication network or a third generation mobile communication technology network.
8. A mobile switching center, comprising:
a receiving module, configured to receive a service request message sent by a mobility management entity, where the service request message is used to instruct a mobile switching center to determine to accept or reject a CSFB call request of a user equipment, and the service request message is sent by the mobility management entity after receiving the CSFB call request sent by the user equipment;
a judging module, configured to judge, according to at least one of a network to which the CSFB call request requests to access, a capability of the mobile switching center, and a load of a network in which the mobile switching center is located, to accept or reject the CSFB call request of the user equipment;
a sending module, configured to send a service response message to the mobility management entity according to the determination result, so that the mobility management entity sends a notification message to the user equipment according to the service response message; wherein:
when the service response message indicates the judging module to judge that the CSFB call request of the user equipment is accepted, the notification message indicates the user equipment to initiate an access request to the mobile switching center; or,
and when the service response message indicates that the judging module judges that the CSFB call request of the user equipment is rejected, the notification message indicates that the user equipment does not initiate an access request to the mobile switching center.
9. The mobile switching center of claim 8, wherein the mobile switching center further comprises:
and the first counting module is used for counting the CSFB fallback initiating times according to the judgment result after the sending module sends the service response message to the mobile management entity according to the judgment result.
10. The mobile switching center of claim 9, wherein the mobile switching center further comprises:
and the second counting module is used for counting the CSFB fallback success times according to the judgment result after the sending module sends the service response message to the mobile management entity according to the judgment result.
11. The mobile switching center of claim 10, wherein the mobile switching center further comprises:
a determining module, configured to determine, after the second counting module counts the number of times of CSFB fallback success according to the self state of the mobile switching center, the CSFB fallback success rate of the user equipment according to the number of times of CSFB fallback initiation and the number of times of CSFB fallback success.
12. The mobile switching center according to any of claims 9-11, wherein the ue accesses a long term evolution, LTE, network before the receiving module receives the service request message sent by the mobility management entity, and the CSFB call request is for the ue to request access to a second generation mobile communication network or a third generation mobile communication technology network.
13. A mobility management entity, comprising:
a first receiving module, configured to receive a circuit switched fallback CSFB call request sent by a user equipment;
a first sending module, configured to send a service request message to a mobile switching center according to the CSFB call request, where the service request message is used to instruct the mobile switching center to determine to accept or reject the CSFB call request of the user equipment;
a second receiving module, configured to receive a service response message sent by the mobile switching center;
a second sending module, configured to send a notification message to the ue according to the service response message, so that the ue determines whether to initiate an access request to the mobile switching center according to the notification message; wherein:
when the service response message indicates the mobile switching center to judge to accept the CSFB call request of the user equipment, the notification message is used for indicating the user equipment to initiate an access request to the mobile switching center; or,
and when the service response message indicates that the mobile switching center judges that the CSFB call request of the user equipment is rejected, the notification message is used for indicating that the user equipment does not initiate an access request to the mobile switching center.
14. The mobility management entity of claim 13, wherein before the second receiving module receives the CSFB call request sent by the user equipment, the user equipment accesses a long term evolution LTE network, and wherein the CSFB call request is used for the user equipment to request access to a second generation mobile communication network or a third generation mobile communication technology network.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013077670 | 2013-06-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103609168A CN103609168A (en) | 2014-02-26 |
| CN103609168B true CN103609168B (en) | 2017-04-19 |
Family
ID=50126090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380000616.2A Active CN103609168B (en) | 2013-06-21 | 2013-06-21 | Access method for circuit switched fallback (CSFB), mobility management entity and mobile switch center |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103609168B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10893564B2 (en) * | 2014-09-18 | 2021-01-12 | Apple Inc. | Aborting an extended service request procedure |
| CN106688274B (en) * | 2014-11-28 | 2020-11-10 | 宇龙计算机通信科技(深圳)有限公司 | Terminal, mobile management entity, switching center, 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 |
| CN107005895A (en) * | 2014-12-30 | 2017-08-01 | 华为技术有限公司 | A kind of method of circuit domain dropping, equipment 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 | A CSFB calling method, system and mobile terminal |
| CN115209487B (en) * | 2021-03-25 | 2025-03-18 | 中国移动通信有限公司研究院 | Voice fallback processing method, device and terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009095777A1 (en) * | 2008-01-31 | 2009-08-06 | Telefonaktiebolaget L M Ericsson (Publ) | Circuit switched fallback for mobile terminated calls |
| CN101640933A (en) * | 2008-07-31 | 2010-02-03 | 华为技术有限公司 | Method for paging user equipment, network equipment, user equipment and network system |
| CN101742692A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Paging processing and information display methods, devices and systems |
| CN102045803A (en) * | 2009-10-17 | 2011-05-04 | 中兴通讯股份有限公司 | System and method for implementing circuit switched fallback of evolved packet system network |
| CN102045791A (en) * | 2009-10-17 | 2011-05-04 | 中兴通讯股份有限公司 | Method and system for realizing circuit switched fallback (CSFB) service in EPS |
| CN103118404A (en) * | 2009-07-23 | 2013-05-22 | 华为技术有限公司 | Method, device and system for backspacing voice calls to circuit switching domain |
-
2013
- 2013-06-21 CN CN201380000616.2A patent/CN103609168B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009095777A1 (en) * | 2008-01-31 | 2009-08-06 | Telefonaktiebolaget L M Ericsson (Publ) | Circuit switched fallback for mobile terminated calls |
| CN101640933A (en) * | 2008-07-31 | 2010-02-03 | 华为技术有限公司 | Method for paging user equipment, network equipment, user equipment and network system |
| CN101742692A (en) * | 2008-11-07 | 2010-06-16 | 华为技术有限公司 | Paging processing and information display methods, devices and systems |
| CN103118404A (en) * | 2009-07-23 | 2013-05-22 | 华为技术有限公司 | Method, device and system for backspacing voice calls to circuit switching domain |
| CN102045803A (en) * | 2009-10-17 | 2011-05-04 | 中兴通讯股份有限公司 | System and method for implementing circuit switched fallback of evolved packet system network |
| CN102045791A (en) * | 2009-10-17 | 2011-05-04 | 中兴通讯股份有限公司 | Method and system for realizing circuit switched fallback (CSFB) service in EPS |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103609168A (en) | 2014-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103609168B (en) | Access method for circuit switched fallback (CSFB), mobility management entity and mobile switch center | |
| CN107248906B (en) | Method for adjusting auxiliary primary cell and base station | |
| US10674363B2 (en) | Access control method, user equipment, and network device | |
| EP3282761B1 (en) | Method for controlling transmission and apparatus | |
| KR101742716B1 (en) | Method for acquiring ue capacity, terminal, and base station | |
| US20150111563A1 (en) | Service Control Method, Terminal, and Network Device | |
| WO2014176863A1 (en) | Access control method and device | |
| US11856413B2 (en) | Coverage enhancement CE function implementation method and device | |
| EP3079384A1 (en) | Method for transmitting small data packet, base station, and user equipment | |
| US11172416B2 (en) | Method for accessing network by user equipment, and access device | |
| US10091761B2 (en) | Apparatus and method for paging in wireless communication system | |
| US12133096B2 (en) | Data transmission method, apparatus, and device | |
| KR20150099367A (en) | Method and apparatus for improving service quality of video call in mobile communication systems | |
| KR20220045181A (en) | Paging Methods and Devices | |
| US10321512B2 (en) | Service control method, terminal, and network device | |
| CN103703821A (en) | Sector switching method, apparatus and equipment | |
| KR101449720B1 (en) | Method And Apparatus for Reducing Bearer Setup Time | |
| CN115361702A (en) | Method and device for identifying VoNR (Voice over Internet protocol) capability of new air interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |