CN101415213B

CN101415213B - Method, system and apparatus for notifying voice call information

Info

Publication number: CN101415213B
Application number: CN 200810210485
Authority: CN
Inventors: 王济勇; 邓永锋; 余勇军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-10-16
Filing date: 2008-08-15
Publication date: 2012-12-12
Anticipated expiration: 2028-08-15
Also published as: CN101415213A

Abstract

The embodiment of the invention discloses a notification method of voice call information. The notification method comprises the following steps: a first entity receiving a voice call control signaling determines whether the current voice call is a voice call of voice call continuity (VCC) by analyzing the signaling, and notifies a determination result to a network side; or a visitor mobile switching center of a circuit domain informs an access network element of the determination result after determining whether the voice call is the voice call of the VCC. The embodiment of the invention further discloses a notification system of the voice call information and a device thereof. By the method, the system and the device, the network side can know whether the voice call is the voice call of the VCC, thus being capable of determining whether to initiate domain switching of the voice call.

Description

Method, system and device for notifying voice call information

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a method, a system, and an apparatus for notifying voice call information.

Background

Second generation/third generation (2G/3G) mobile communication networks have been deployed for many years and can be regarded as a comprehensive coverage to some extent, and with the development of system architecture evolution/long term evolution (SAE/LTE) network technology, SAE/LTE networks have covered some urban areas and traffic hot spots, so that in current communication networks, SAE/LTE networks and 2G/3G networks coexist.

For different network bearer mechanisms, voice calls for mobile communications can be classified into the following categories:

the first type is conversational class services carried by the Circuit (CS) domain, such as voice telephony;

the second type is a Packet Switched (PS) domain carried conversational class service, also known as voice over IP (VoIP) class service, where quality of service (QoS) guarantees are provided by an IP multimedia service subsystem (IMS), such as voice over IP telephony.

The SAE/LTE network acts as a PS domain bearer packet switching system, voice calls can only be transported on its packet domain bearer, and IMS controls voice calls over IP-based networks. In 2G/3G networks, voice calls are typically carried over the CS domain.

In a voice call process, a user terminal (UE) may span two networks, and due to the difference of the bearer mechanisms of the voice call in mobile communication, when the UE moves from an area covered by one network base station to an area covered by another network base station, a break of the voice call may occur, thereby affecting the continuity of the voice call of the user.

In order to solve the above problems and ensure the continuity of the user's voice call, when the UE enters another network from one network or is handed over from a VoIP-capable cell to a non-VoIP-capable cell in a GERAN network, a domain switching of the voice call between IMS and CS domains needs to be performed. Currently, a single radio link voice continuity (SRVCC) technology is used to implement domain switching for voice calls, and according to the SRVCC technology, domain switching for voice calls is actively initiated by the UE. According to the requirement of the Voice Call Continuity (VCC) specification adopted by the SRVCC technology, one of the conditions that a voice call can perform domain switching between the IMS and CS domains needs to satisfy is that the voice call is a VCC voice call, and therefore, only when the voice call performed by the UE is a VCC voice call, the domain switching procedure of the voice call may be initiated. In the prior art, a UE having VCC capability and subscribed with a voice call considers that the voice call is VCC by default, and when the UE enters another network from one network, a domain switching procedure of the voice call between the IMS domain and the CS domain is initiated.

It can be seen that in the prior art, the domain switching for voice call is actively initiated by the UE, and the 3GPP communication network requires that the domain switching for voice call is controlled by the network, not the UE. However, according to the current standardized specifications, both the core network element and the access network element of the SAE/LTE network and the access network element of the 2G/3G network cannot determine whether a voice call is a VCC voice call, and therefore, it cannot determine whether to initiate a domain switching procedure for the voice call according to the determination result.

Disclosure of Invention

Embodiments of the present invention provide a method, a system, and a device for notifying call information, so as to solve a problem in the prior art that a network side cannot know whether a voice call is a VCC voice call.

The embodiment of the invention provides a method for notifying voice call information, which comprises the following steps:

a first entity receiving a voice call control signaling determines whether the current voice call is a voice call of Voice Call Continuity (VCC) by analyzing the signaling, and if the signaling contains address information of a VCC application server or indication information of VCC voice call, the first entity determines that the current voice call is a VCC voice call and informs a network side of a determination result.

after determining whether the voice call is a voice call of voice call continuity VCC, the visited mobile switching center VMSC of the circuit CS domain notifies the access network element of the determination result.

The embodiment of the invention provides a notification system of voice call information, which comprises:

a first receiving unit, configured to receive a voice call control signaling;

a determining unit, configured to determine whether the current voice call is a voice call of VCC (voice call continuity), by analyzing the signaling received by the first receiving unit, and if the signaling contains address information of a VCC application server or indication information of a VCC voice call, the first entity determines that the current voice call is a VCC voice call; and

an indicating unit configured to notify the first network unit of a result determined by the determining unit.

the visit mobile switching center is used for informing the access network element of the determined result after determining whether the voice call is the voice call of the voice call continuity VCC;

and the access network element is used for storing the information whether the voice call in the notification is a voice call of VCC or not when the notification is received.

An embodiment of the present invention provides a notification apparatus, including:

a receiving unit, configured to receive a voice call control signaling;

a determining unit, configured to determine whether the current voice call is a voice call of voice call continuity VCC by analyzing the voice call control signaling, and if the signaling includes address information of a voice call continuity VCC application server or indication information of a VCC voice call, the first entity determines that the current voice call is the VCC voice call;

and the notification unit is used for notifying the determination result of the determination unit to the network side.

An embodiment of the present invention provides a network device, including:

a receiving unit for receiving a notification including information indicating whether a voice call is a voice service of a voice call continuity VCC;

and the storage unit is used for storing the information whether the voice call in the notification is the voice call of VCC or not when the receiving unit receives the notification.

The embodiment of the invention has the beneficial effects that:

in the embodiment of the invention, an entity receiving a voice call control signaling determines whether the voice call is a VCC voice call or not by analyzing the signaling, and notifies a network side of a determination result; or, after determining whether the voice call is a voice call of VCC, the VMSC of the CS domain notifies the access network element of the determination result. By the scheme, the network side can know whether the voice call is a voice call of VCC or not, so that whether the domain switching of the voice call is initiated or not is determined.

Drawings

FIG. 1 is a schematic flow chart of a first embodiment of the present invention;

FIG. 2 is a schematic flow chart of a second embodiment of the present invention;

FIG. 3 is a flow chart of a third embodiment of the present invention;

FIG. 4 is a schematic flow chart of a fourth embodiment of the present invention;

FIG. 5 is a schematic flow chart of a fifth embodiment of the present invention;

FIG. 6 is a schematic flow chart of a sixth embodiment of the present invention;

FIG. 7 is a flow chart illustrating a seventh embodiment of the present invention;

FIG. 8 is a flow chart illustrating an eighth embodiment of the present invention;

FIG. 9 is a flow chart illustrating a ninth embodiment of the present invention;

FIG. 10 is a schematic flow chart of a tenth embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a system according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a system according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.

Detailed Description

In order to enable a network side to know whether a voice call is a voice call of VCC or not and further determine whether to initiate domain switching of the voice call, the embodiment of the invention provides a notification method of voice call information. In the method for initiating a CS domain voice call provided in the embodiment of the present invention, a Visited Mobile Switching Center (VMSC) notifies a 2G/3G access network element of a result of determining whether a voice call is a VCC voice call, and a network side determines whether to trigger a UE to initiate a domain switching of the voice call according to the reported result.

The following describes a method for notifying voice call information according to an embodiment of the present invention with reference to a specific embodiment:

the first embodiment is as follows:

in this embodiment, an IMS voice call is performed, in a calling scenario, a UE determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from an IM CNSubsystem, and then reports a determination result to an access network element, where the access network element includes a Radio Network Controller (RNC) in 3G or an evolved base station (eNodeB) in SAE/LTE, and the eNodeB is taken as an example in this embodiment, and a specific flow is shown in fig. 1:

step 101-102: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW);

step 103-104: when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 105: when the UE receives a voice call control signaling SIP200OK, analyzing the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC Anchor Indication of VCC voice call, determining that the voice call is VCC voice call, and sending VCC voice call Indication message VCC call Indication to the eNodeB to inform the eNodeB that the voice call is VCC voice call;

step 106: after receiving the VCC call indication message, the eNodeB sends a response message VCC call response to the UE, and stores the information that the voice call is a VCC voice call.

It should be noted that there is no fixed order relationship between the steps 103-104 and 105-106, and both can be executed in series or in parallel.

Example two:

in this embodiment, the present embodiment is an IMS voice call, in a calling or called scenario, a UE determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from an IM CNSubsystem, and then notifies an access network element of a determination result, where the specific flow is as shown in fig. 2:

step 201: IM CN Subsystem sends the indication information including VCC voice call to the UE, namely the voice call control signaling SIP200 OK;

step 202: when receiving the voice call control signaling SIP200OK, the UE may send a response message to the IM CNSubsystem, or may not send the response message to the IM CN Subsystem;

step 203: when the UE receives a voice call control signaling SIP200OK, analyzing the signaling, if the signaling contains Indication information VCC ordered Indication of VCC voice call, determining that the voice call is VCC voice call, and sending VCC voice call Indication information VCC ordered Indication to the BSS to inform the BSS that the voice call is VCC voice call;

step 204: after receiving the VCC call indication message, the BSS may send a response message VCC call response to the UE, and store the information that the voice call is a VCC voice call, or may not send the response message to the UE.

It should be noted that, in the embodiment, the BSS includes two types of network elements, namely BTS and BSC. The BSS receives the VCC call indication message, which may be received by the BTS or received by the BSC. In addition, the same description applies to the following description of the embodiments. Example three:

in this embodiment, the present embodiment is an IMS voice call, in a calling scenario, a UE determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from an IM CNSubsystem, and then reports a determination result to an access network element and a core network element, where the core network element includes a Serving GPRS Support Node (SGSN) in 3G or a Mobility Management Element (MME) in SAE/LTE, and in this embodiment, the access network element takes an eNodeB as an example, the core network element takes an MME as an example, and a specific flow is shown in fig. 3:

step 301-: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW);

step 303-304: when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 305: when the UE receives a voice call control signaling SIP200OK, analyzing the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC Anchor Indication of VCC voice call, determining that the voice call is VCC voice call, and sending VCC voice call Indication message VCC call Indication to the eNodeB to inform the eNodeB that the voice call is VCC voice call;

step 306: after receiving the VCC call indication message, the eNodeB forwards the VCCcall indication message to the MME and stores the information of the voice call of which the voice call is VCC;

step 307: after receiving the VCC call indication message, the MME sends a response message VCC call response to the eNodeB, and stores the information that the voice call is a VCC voice call;

step 308: the eNodeB forwards the received VCC call response message to the UE in response to the received VCC call indication message.

It should be noted that there is no fixed sequence relationship between the steps 303-304 and 305-308, and the two steps can be executed in series or in parallel

Example four:

in this embodiment, the IMS voice call is performed, in a calling or called scenario, the UE determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from an IM CNSubsystem, and then reports a determination result to an access network element and a core network element, where the specific flow is as shown in fig. 4:

step 401: IM CN Subsystem sends the voice call control signaling SIP200OK containing VCC voice call indication information to UE;

step 402: when receiving the voice call control signaling SIP200OK, the UE can send a response signaling SIP ACK to the IM CNSubsystem, or does not send a response message;

step 403: when receiving a voice call control signaling SIP200OK, UE analyzes the SIP200OK signaling, if the signaling contains Indication information VCC ordered Indication of VCC voice call, the UE determines that the voice call is a VCC voice call, and sends VCC voice call Indication information VCC call Indication to BSS to inform the BSS that the voice call is a VCC voice call;

step 404: after receiving the VCC call indication message, the BSS forwards the VCC call indication message to the MSC or SGSN, and the BSS can store the information that the voice call is a VCC voice call;

step 405: after receiving the VCC call indication message, the MSC or SGSN sends a response message VCC call response to the BSS, stores the information of the voice call of which the voice call is VCC, and does not send a response message to the BSS;

step 406: the BSS forwards the received VCC call response message to the UE in response to the received VCC call indication message, or may not send a response message to the UE.

Example five:

in this embodiment, the IMS voice call is performed, in a calling scenario, the UE determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from the IM CNSubsystem, and then reports a determination result to a core network element-MME, where the specific flow is as shown in fig. 5:

step 501-502: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW);

step 503-504: when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 505: when the UE receives a voice call control signaling SIP200OK, analyzing the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC Anchor Indication of VCC voice call, determining that the voice call is VCC voice call, and sending VCC voice call Indication message VCC call Indication to MME to inform the MME that the voice call is VCC voice call;

step 506: after receiving the VCC call indication message, the MME sends a response message VCC call response to the UE, and stores the information that the voice call is a VCC voice call.

It should be noted that there is no fixed order relationship between the steps 503-504 and 505-506, and both can be executed in series or in parallel.

Example six:

in this embodiment, the present embodiment is an IMS voice call, where in a calling scenario, the PDN GW determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from the IM CNSubsystem, and then reports a determination result to a core network element-MME, where a specific flow is as shown in fig. 6:

step 601-604: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW); when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 605: when receiving a voice call control signaling SIP200OK, the PDN GW analyzes the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC ordered Indication of VCC voice call, the PDN GW determines that the voice call is a voice call of VCC, and sends VCC voice call Indication information VCC centralized Indication to an MME to inform the MME that the voice call is the voice call of VCC;

step 606: and after receiving the VCC call indication message, the MME sends a response message VCC call response to the PDN GW to respond to the received VCC call indication message and stores the information of the voice call of which the voice call is VCC.

It should be noted that there is no fixed order relationship between steps 605-606 and 602-604, and both can be executed in series or in parallel.

Example seven:

in this embodiment, the present embodiment is an IMS voice call, where in a calling scenario, the PDN GW determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from the IM CNSubsystem, and then reports a determination result to a core network element-MME and an access network element-eNodeB, where a specific flow is as shown in fig. 7:

step 701-704: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW); when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 705: when receiving a voice call control signaling SIP200OK, the PDN GW analyzes the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC ordered Indication of VCC voice call, the PDN GW determines that the voice call is a voice call of VCC, and sends VCC voice call Indication information VCC centralized Indication to an MME to inform the MME that the voice call is the voice call of VCC;

step 706: when the MME receives the VCC call indication message, the VCCcall indication message is forwarded to the eNodeB, and the information of the voice call of which the voice call is VCC is stored;

step 707: when receiving the VCC call indication message, the eNodeB sends a response message VCC call response to the MME, and stores the information that the voice call is a VCC voice call;

step 708: and the MME forwards the received VCC call response message to the PDN GW to respond to the received VCC call indication message.

It should be noted that there is no fixed order relationship between the steps 705-.

Example eight:

in this embodiment, the present embodiment is an IMS voice call, where in a calling scenario, the PDN GW determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from the IM CNSubsystem, and then reports a determination result to an access network element — eNodeB, where a specific flow is as shown in fig. 8:

step 801-: the IM CN Subsystem sends a voice call control signaling SIP200OK to the UE through a packet data network gateway (PDN GW); when the UE receives a voice call control signaling SIP200OK, the response signaling SIP ACK is sent to an IM CN Subsystem through the PDN GW;

step 805: after receiving a voice call control signaling SIP200OK, the PDN GW analyzes the SIP200OK signaling, if the Via domain of the signaling contains the address information of VCC AS or the signaling contains Indication information VCC ordered Indication of VCC voice call, the PDN GW determines that the voice call is a VCC voice call, and sends VCC voice call Indication information VCC accompanying Indication to the eNodeB to inform the eNodeB that the voice call is a VCC voice call;

step 806: and after receiving the VCC call indication message, the eNodeB sends a response message VCC call response to the PDN GW to respond to the received VCC call indication message and stores the information of the voice call of which the voice call is VCC.

It should be noted that there is no fixed order relationship between the steps 805-806 and 802-804, and the two steps can be executed in series or in parallel.

Example nine:

in this embodiment, the present embodiment is an IMS voice call, where in a called scenario, the PDN GW determines whether a current voice call is a VCC voice call by analyzing a voice call control signaling from the IM CNSubsystem, and then reports a determination result to a core network element-MME and an access network element-eNodeB by setting indication information in a paging message, where a specific flow is as shown in fig. 9:

step 901: IM CN Subsystem sends voice call control signaling SIP INVITE to PDN GW;

step 902: after receiving the voice call control signaling SIP INVITE, the PDN GW parses the sip invite signaling, determines that the voice call is a VCC voice call if the Via domain of the signaling contains address information of a VCC AS, or the signaling contains VCC authorized Indication information of the VCC voice call, sets an information authorized Indicator indicating that the voice call is a VCC voice call in a Paging message Paging sent to the MME, and sends the Paging message to the MME;

step 903: when the MME receives the paging message, the paging message is forwarded to the eNodeB, and the information of the voice call of which the voice call is VCC is stored;

step 904: when the eNodeB receives the paging message, the information of the voice call of which the voice call is VCC is stored.

In this embodiment, the PDN GW notifies the MME or the eNodeB of the information that the voice call is the VCC voice call by using the original paging message, and the system does not need to add an additional signaling message, which is a preferred embodiment. Certainly, in a called scenario, the PDN GW may also notify the MME or/and the eNodeB by adding a dedicated signaling instead of setting the indication information in the original paging message, which is the same as embodiment six, embodiment seven, and embodiment eight. Or, the UE may determine whether the voice call is a VCC voice call by analyzing the voice call control signaling, and report the determination result to the MME or/and the eNodeB, where the specific method is the same as that in the first embodiment, the third embodiment, and the fifth embodiment, and details are not repeated here.

The call control signaling SIP200OK and the response signaling SIP ACK in the above embodiment, which include the indication information of the VCC voice call, are only exemplary signaling, and may also be other call control signaling, which is not limited herein.

Example ten:

in this embodiment, the present embodiment is a CS domain voice call, and in a calling or called scenario, the VMSC reports a determination result of whether the voice call is a VCC voice call to an access network element-Base Station Controller (BSC)/Radio Network Controller (RNC), where a specific flow is shown in fig. 10:

step 1001: UE initiates a voice call to a VMSC, and the VMSC determines whether the voice call is a voice call of VCC or not by inquiring a core network element, such as a GSM Service Control Function (gsmSCF) entity, and stores a determination result;

step 1002: if the voice call is a VCC voice call, the VMSC sends a VCC voice call indication VCC attached indication message to the BSC/RNC to inform the BSC/RNC that the voice call is a VCC voice call;

preferably, in this step, after the call setup is completed, that is, after receiving the connection response Ack message, the VMSC sends a VCC authenticated indication message to the BSC/RNC.

Step 1003: when BSC/RNC receives VCC transmitted indication message, it sends response message VCC transmitted response to VMSC, and stores the information of this voice call as VCC voice call.

Referring to fig. 11, an embodiment of the present invention further provides a system for notifying voice call information, where the system includes:

a notification unit 1101, configured to receive a voice call control signaling, determine whether the current voice call is a voice call of VCC by analyzing the signaling, and notify the first network unit of the determination result; the notification unit may specifically be: UE or PDN GW.

The first network unit 1102 is configured to, when receiving the notification, store information of whether the voice call in the notification is a VCC voice call. The first network element may specifically be: an access network element or a core network element.

The notification unit 1101 includes:

a first receiving unit 11011, configured to receive a voice call control signaling;

a determining unit 11012, configured to determine, by analyzing the voice call control signaling, whether the signaling includes address information of a VCC application server or indication information of a VCC voice call, if the signaling includes the address information of the VCC application server or the indication information of the VCC voice call, determine that the current voice call is a VCC voice call, and otherwise, determine that the current voice call is not a VCC voice call;

an indicating unit 11013, configured to send, when the determining unit determines that the current voice call is a voice call of VCC, a notification message to the access network element, where the notification message includes information indicating that the current voice call is a voice call of VCC.

The first network element 1102 comprises:

a second receiving unit 11021, configured to receive the notification sent by the notification unit;

a storing unit 11022, configured to store information of whether the voice call in the notification is a VCC voice call.

The first network element 1102 further comprises:

a forwarding unit 11023, configured to forward the notification to the second network element;

the system further comprises:

the second network unit 1103 is configured to, when receiving the notification, store information of whether the voice call in the notification is a voice call of VCC. The second network element may specifically be an access network element or a core network element, and when the first network element is the access network element, the second network element is the core network element; and when the first network element is a core network element, the second network element is an access network element.

The network element of the access network comprises a network element in a BSS or an RNC or an eNodeB; the core network element comprises an MSC, an SGSN or an MME.

Referring to fig. 12, an embodiment of the present invention further provides a system for notifying voice call information, where the system includes:

the visiting mobile switching center 1201 is used for notifying the access network element of the determination result after determining whether the voice call is a voice call of VCC;

and the access network element 1202 is configured to store, when the notification is received, information of whether the voice call in the notification is a voice call of VCC. The access network element may specifically be: BSC or RNC.

The visited mobile switching center 1201 is configured to: and after the voice call is established, informing the determined result to an access network element.

Referring to fig. 13, an embodiment of the present invention further provides a notification apparatus, where the apparatus includes:

a receiving unit 1301, configured to receive a voice call control signaling;

a determining unit 1302, configured to determine whether the current voice call is a VCC voice call by analyzing the voice call control signaling;

and an indicating unit 1303, configured to notify the network side of the determination result of the determining unit.

The determination unit 1302 includes:

a first unit 13021, configured to judge whether the signaling includes address information of a VCC application server by analyzing the voice call control signaling, and if so, determine that the current voice call is a voice call of VCC, otherwise, determine that the current voice call is not a voice call of VCC;

a second unit 13022, configured to judge whether the signaling includes indication information of a VCC voice call by analyzing the voice call control signaling, if so, determine that the current voice call is a VCC voice call, and otherwise, determine that the current voice call is not a VCC voice call.

The following describes a specific workflow of the notification apparatus:

step S01: a receiving unit of the notification device receives a voice call control signaling;

step S02: the determining unit analyzes the voice call control signaling received by the receiving unit, and determines whether the voice call is a VCC voice call, which may specifically be:

the first unit contained in the determining unit analyzes the voice call control signaling, judges whether the Via domain of the signaling contains the address information of the VCC application server, if so, determines that the voice call is the voice call of VCC, otherwise, determines that the voice call is not the voice call of VCC; or,

the second unit contained in the determining unit analyzes the voice call control signaling, judges whether the signaling contains indication information of VCC voice call, if yes, determines that the voice call is VCC voice call, otherwise, determines that the voice call is not VCC voice call.

Step S03: the instructing unit notifies the network side of the determination result of the determining unit, and specifically may send a notification message including information indicating whether the voice call is a voice call of VCC to the network side.

Referring to fig. 14, an embodiment of the present invention further provides a network device, where the network device includes:

a receiving unit 1401 for receiving a notification including information indicating whether a voice call is a voice call of VCC;

a storing unit 1402, configured to, when the receiving unit receives the notification, store information of whether the voice call in the notification is a voice call of VCC.

The apparatus further comprises:

a forwarding unit 1403, configured to forward the notification.

The following describes a specific workflow of the network device:

step S11: a receiving unit of the network device receives a notification including information indicating whether a voice call is a voice call of VCC;

step S12: and the storage unit stores the information whether the voice call is a voice call of VCC or not when the receiving unit receives the notification.

When the network device further includes a forwarding unit, the method may further include the following steps:

step S13: the forwarding unit forwards the notification received by the receiving unit to other entities.

In conclusion, the technical effects of the invention are as follows:

for an IMS voice call, the UE or PDN GW that receives voice call control signaling from the IM CN Subsystem determines whether the voice call is a VCC voice call by analyzing the voice call control signaling, and then reports the determination result to the SAE/LTE network or the 2G/3G network. For a CS domain voice call, the VMSC reports the result of determining whether the voice call is a VCC voice call to the 2G/3G network. By the scheme, the network side can know whether the voice call is a voice call of VCC or not, and further can determine whether to trigger the UE to initiate the domain switching of the voice call, so that the initiation control of the network side on the domain switching of the voice call is realized.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for notifying voice call information, the method comprising:

a first entity receiving a voice call control signaling from an IP multimedia core network subsystem, determining whether an IMS voice call of the IP multimedia service subsystem is a voice call of voice call continuity VCC by analyzing the signaling, and if the signaling includes address information of a voice call continuity VCC application server or indication information of the VCC voice call, determining that the IMS voice call is the voice call of VCC by the first entity, and notifying an access network element or a core network element of a network side of a determination result.

2. The method of claim 1, wherein the first entity is a user terminal, UE, or a packet data network gateway, PDN GW.

3. The method according to claim 1 or 2, characterized in that the access network element is a radio network controller RNC and the core network element is a mobile switching center MSC or a serving GPRS support node SGSN; or

The network element of the access network is a network element in a base station subsystem BSS, and the network element of the core network is a mobile switching center MSC or a serving GPRS support node SGSN; or

The access network element is an evolved base station eNodeB, and the core network element is a mobility management element MME.

4. The method of claim 2, wherein when the first entity is a UE and it is determined that the current voice call is a voice call of VCC, the notifying, by the UE, an access network element and/or a core network element on a network side of a determination result comprises:

the UE sends a notification message to an access network element, wherein the notification message contains information indicating that the voice call is a voice call of VCC; when the access network element receives the notification message, the information that the voice call is a voice call of VCC is stored; or,

the UE sends a notification message to a core network element, wherein the notification message contains information indicating that the voice call is a voice call of VCC; and when the core network element receives the notification message, the information that the voice call is a VCC voice call is stored.

5. The method of claim 4, wherein upon receipt of the notification message by the access network element, the method further comprises:

the access network element forwards the notification message to a core network element; and when the core network element receives the notification message, the information that the voice call is a VCC voice call is stored.

6. The method of claim 2, wherein when the first entity is a PDN GW and the current voice call is determined to be a VCC voice call, the notifying an access network element and/or a core network element on a network side of the determination result comprises:

the PDN GW sends a notification message to a core network element, wherein the notification message contains information indicating that the voice call is a voice call of VCC; when the core network element receives the notification message, the information that the voice call is a voice call of VCC is stored; or,

the PDN GW sends a notification message to an access network element, wherein the notification message contains information indicating that the voice call is a voice call of VCC; and when the access network element receives the notification message, the information that the voice call is a voice call of VCC is stored.

7. The method of claim 6, wherein when the notification message is received by the core network element, the method further comprises:

the core network element forwards the notification message to an access network element; and when the access network element receives the notification message, the information that the voice call is a voice call of VCC is stored.

8. The method of claim 7, wherein the notification message is a newly added dedicated message or a paging message.

9. A method for notifying voice call information, the method comprising:

a visiting mobile switching center VMSC of a circuit CS domain receives a voice call initiated by user equipment UE, and after the VMSC determines that the voice call is a voice call of voice call continuity VCC by inquiring a core network element, the VMSC informs an access network element of a determination result.

10. The method of claim 9, wherein the access network element comprises: a base station controller BSC or a radio network controller RNC.

11. The method of claim 9, wherein the VMSC notifies the access network element of the determination result after the voice call setup is completed.

12. A system for notifying voice call information, the system comprising:

a notification unit, and a first network unit;

the first network element is an access network element or a core network element; and

the notification unit includes:

a first receiving unit, configured to receive a voice call control signaling from an IP multimedia core network subsystem;

a determining unit, configured to determine whether the IMS voice call of the current IP multimedia service subsystem is a voice call of VCC (voice call continuity) by analyzing the signaling received by the first receiving unit, and if the signaling includes address information of a VCC application server or indication information of a VCC voice call, determine that the IMS voice call is a VCC voice call; and

13. The system of claim 12, wherein the instructing unit notifying the first network element of the result determined by the determining unit comprises: when the determining unit determines that the voice call is a voice call of VCC, the indicating unit sends a notification message to the access network element, wherein the notification message includes information indicating that the voice call is a voice call of VCC.

14. The system of claim 13, wherein the first network element comprises:

a second receiving unit, configured to receive the notification sent by the indicating unit;

and the storage unit is used for storing the information whether the voice call is VCC voice call.

15. The system of claim 14, wherein the first network element further comprises:

a forwarding unit, configured to forward the notification to a second network unit;

the system further comprises:

and the second network unit is used for storing the information whether the voice call in the notification is the voice call of VCC or not when receiving the notification.

16. The system of claim 12, wherein the access network element is a radio network controller, RNC, and the core network element is a serving GPRS support node, SGSN; or

The network element of the access network is a network element in a BSS, and the network element of the core network is a Mobile Switching Center (MSC) or a Serving GPRS Support Node (SGSN); or

17. The system of claim 12, wherein the notification element is a user terminal, UE, or a packet data network gateway, PDN GW.

18. A system for notifying voice call information, the system comprising:

the visiting mobile switching center is used for receiving a voice call initiated by the user terminal UE, determining the voice call as a voice call with voice call continuity VCC by inquiring the core network element, and then informing the access network element of the determination result;

and the access network element is used for storing the information that the voice call in the notification is the voice call of VCC when the notification is received.

19. The system of claim 18, wherein the visiting mobile switching center is to: and after the voice call is established, informing the determined result to an access network element.

20. The system of claim 18, wherein the access network element comprises: a base station controller BSC or a radio network controller RNC.

21. A notification apparatus, comprising:

a receiving unit, configured to receive a voice call control signaling from an IP multimedia core network subsystem;

a determining unit, configured to determine whether the IMS voice call of the current IP multimedia service subsystem is a voice call of voice call continuity VCC by analyzing the voice call control signaling, and if the signaling includes address information of a voice call continuity VCC application server or indication information of a VCC voice call, determine that the IMS voice call is the VCC voice call;

and the notifying unit is used for notifying the determining result of the determining unit to an access network element or a core network element at a network side.