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

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

A notification method, system and device for voice call information

technical field

The invention relates to the field of mobile communication, in particular to a method, system and device for notifying voice call information. the

Background technique

After years of deployment, the second/third generation (2G/3G) mobile communication network can be regarded as a comprehensive coverage to some extent. With the development of system architecture evolution/long-term evolution (SAE/LTE) network technology With the development, the SAE/LTE network has covered some urban areas and traffic hot spots, making SAE/LTE network and 2G/3G network coexist in the current communication network. the

According to different network bearer mechanisms, the voice calls of mobile communication can be divided into the following categories:

The first type is conversational services carried by the circuit (CS) domain, such as voice calls;

The second type is the conversational service carried by the Packet Switching (PS) domain, also known as Voice over IP (VoIP) service, which is guaranteed by the IP Multimedia Service Subsystem (IMS), such as Voice over IP Telephone. the

SAE/LTE network is a packet switching system carried by the PS domain. Voice calls can only be transmitted on the packet domain bearer. IMS controls voice calls through the IP-based network. In 2G/3G networks, voice calls are generally carried on the CS domain. the

During a voice call, the user terminal (UE) may cross two networks. Due to the difference in the bearer mechanism of the mobile communication voice call, when the UE moves from the area covered by the base station of one network to the area covered by the base station of the other network , the voice call may be interrupted, which affects the continuity of the user's voice call. the

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 switches from a cell that supports VoIP to a cell that does not support VoIP in the GERAN network, it is necessary to make a voice call between the IMS and Domain transitions between CS domains. Currently, Single Radio Link Voice Continuity (SRVCC) technology is used to implement the domain switching of voice calls. According to the SRVCC technology, the domain switching of voice calls is initiated by the UE. According to the requirements 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 be satisfied is that the voice call is a voice call of the VCC. Therefore, only in Only when the voice call made by the UE is a voice call of the VCC, it is possible to initiate the domain switching process of the voice call. In the prior art, a UE with VCC capability and subscribed voice call defaults that its voice call is a VCC voice call. When the UE enters another network from one network, it will initiate a voice call in Domain transition process between IMS and CS domains. the

It can be seen that, in the prior art, the domain switching of voice calls is initiated by the UE, but the 3GPP communication network requires that the domain switching of voice calls be controlled by the network instead of the UE. However, according to the current standardized specification, neither the core network element nor the access network element of the SAE/LTE network, nor the access network element of the 2G/3G network can determine whether a voice call is a VCC voice call, and thus The domain conversion process of whether to initiate a voice call cannot be decided based on the determination result. the

Contents of the invention

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

An embodiment of the present invention provides a method for notifying voice call information, the method comprising:

The first entity that receives the voice call control signaling determines whether the voice call is a voice call of the voice call continuity VCC by analyzing the signaling, if the signaling includes the address information of the voice call continuity VCC application server or the indication information of the VCC voice call, the first entity determines that the current voice call is a VCC voice call, and notifies the network side of the determination result. the

An embodiment of the present invention provides a method for notifying voice call information, the method comprising:

After the visiting mobile switching center VMSC in the CS domain of the circuit determines whether the voice call is a voice call of the voice call continuity VCC, it notifies the network element of the access network of the determination result. the

The embodiment of the present invention provides a notification system for voice call information, the system includes:

The first receiving unit is used to receive voice call control signaling;

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

The indicating unit is configured to notify the first network unit of the result determined by the determining unit. the

The embodiment of the present invention provides a notification system for voice call information, the system includes:

Visiting the mobile switching center, after determining whether the voice call is a voice call of the voice call continuity VCC, notifying the network element of the access network of the determination result;

The network element of the access network is configured to save the information of whether the voice call in the notification is a voice call of the VCC when receiving the notification. the

An embodiment of the present invention provides a notification device, which includes:

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

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

a notification unit, configured to notify the network side of the determination result of the determination unit. the

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

The receiving unit is used to receive a notification including information indicating whether the voice call is a voice service of voice call continuity VCC;

The storage unit is configured to store information about whether the voice call in the notification is a voice call of the VCC when the receiving unit receives the notification. the

The beneficial effects of the embodiments of the present invention are:

In the embodiment of the present invention, the entity that receives the voice call control signaling determines whether the voice call is a VCC voice call by analyzing the signaling, and notifies the network side of the determination result; or, the VMSC in the CS domain is determining whether the voice call After whether the call is a voice call of the VCC, the determination result is notified to the network element of the access network. Through the above solution, the network side can know whether the voice call is a voice call of the VCC, so as to decide whether to initiate domain switching of the voice call. the

Description of drawings

Fig. 1 is the schematic flow chart of embodiment one of the present invention;

Fig. 2 is the schematic flow chart of embodiment two of the present invention;

Fig. 3 is the schematic flow chart of embodiment three of the present invention;

Fig. 4 is the schematic flow chart of embodiment four of the present invention;

Fig. 5 is the schematic flow chart of embodiment five of the present invention;

Fig. 6 is the schematic flow chart of embodiment six of the present invention;

Fig. 7 is the schematic flow chart of embodiment seven of the present invention;

Figure 8 is a schematic flow diagram of Embodiment 8 of the present invention;

Fig. 9 is a schematic flow chart of Embodiment 9 of the present invention;

Fig. 10 is a schematic flow chart of Embodiment 10 of the present invention;

Figure 11 is a schematic diagram of the system structure provided by the embodiment of the present invention;

Fig. 12 is a schematic diagram of the system structure provided by the embodiment of the present invention;

Figure 13 is a schematic diagram of the device structure provided by the embodiment of the present invention;

Fig. 14 is a schematic structural diagram of the device provided by the embodiment of the present invention. the

Detailed ways

In order to enable the network side to know whether a voice call is a VCC voice call, and then decide whether to initiate domain switching of the voice call, the embodiment of the present invention provides a method for notifying voice call information. In this method, for an IMS voice call, a voice call from The voice call control signaling entity of the IP Multimedia Core Network Subsystem (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 2G In a 3G network, the network side decides whether to trigger domain switching of the UE to initiate a voice call according to the reported result. In the method for initiating a voice call in the CS domain provided by the embodiment of the present invention, the visited mobile switching center (VMSC) notifies the 2G/3G access network element of the result of determining whether the voice call is a VCC voice call, and the network side according to the The reported result determines whether to trigger the domain switching of the UE to initiate a voice call. the

The notification method of the voice call information provided by the embodiment of the present invention is specifically described below in conjunction with specific embodiments:

Embodiment one:

This embodiment is an IMS voice call. In the calling scenario, the UE determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then reports the determination result to the network element of the access network. The network element includes a radio network controller (RNC) in 3G or an evolved base station (eNodeB) in SAE/LTE. This embodiment takes eNodeB as an example, and the specific process is as shown in Figure 1:

Steps 101-102: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW);

Steps 103-104: When the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK to the IM CN Subsystem through the PDN GW;

Step 105: When the UE receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the VCC voice call indication information VCC Anchored Indication, it is determined that the voice call is a VCC voice call, and the VCC voice call indication message VCC call indication is sent to the eNodeB to notify the eNodeB that the voice call is a VCC voice call;

Step 106: After receiving the VCC call indication message, the eNodeB sends a response message VCC call response to the UE in response to the received VCC call indication message, and saves the information that this voice call is a VCC voice call. the

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

Embodiment two:

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

Step 201: The IM CN Subsystem sends the voice call control signaling SIP 200OK containing the indication information of the VCC voice call to the UE;

Step 202: When the UE receives the voice call control signaling SIP 200OK, it may send a response message to the IM CN Subsystem, or may not send a response message to the IM CN Subsystem;

Step 203: When the UE receives the voice call control signaling SIP 200OK, it parses the signaling, and if the signaling contains the indication information VCC Anchored Indication of the VCC voice call, then determines that the voice call is a VCC voice call, and sends it to the BSS The VCC voice call indication message VCC callindication informs it that this voice call is a VCC voice call;

Step 204: After receiving the VCC call indication message, the BSS can send a response message VCC call response to the UE in response to the received VCC call indication message, and save the information that this voice call is a VCC voice call, or not send it to the UE Answer message. the

It should be noted that, in the embodiment, the BSS includes two types of network elements, the BTS and the BSC. The BSS receives the VCC call indication message, either for the BTS or for the BSC. In addition, this description is also applicable to the subsequent description of the embodiments. Embodiment three:

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

Steps 301-302: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW);

Steps 303-304: When the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK to the IM CN Subsystem through the PDN GW;

Step 305: When the UE receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the indication information of the VCC voice call VCC Anchored Indication, it is determined that the voice call is a VCC voice call, and the VCC voice call indication message VCC call indication is sent to the eNodeB to notify the eNodeB that the voice call is a VCC voice call;

Step 306: After receiving the VCC call indication message, the eNodeB forwards the VCC call indication message to the MME, and saves the information that this voice call is a VCC voice call;

Step 307: After receiving the VCC call indication message, the MME sends a response message VCC call response to the eNodeB in response to the received VCC call indication message, and saves the information that this voice call is a VCC voice call;

Step 308: The eNodeB forwards the received VCC call response message to the UE to respond to the received VCC call indication message. the

It should be noted that there is no fixed sequence relationship between steps 303-304 and steps 305-308, both of which can be executed serially or in parallel

Embodiment four:

This embodiment is an IMS voice call. In the calling or called scenario, the UE determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then reports the determination result to the network element of the access network and core network elements, the specific process is shown in Figure 4:

Step 401: The IM CN Subsystem sends the voice call control signaling SIP 200OK containing the VCC voice call indication information to the UE;

Step 402: When the UE receives the voice call control signaling SIP 200OK, it may send the response signaling SIP ACK to the IM CNSubsystem, or may not send a response message;

Step 403: When the UE receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, and if the signaling contains the indication information VCC Anchored Indication of the VCC voice call, then determines that the voice call is a voice call of the VCC, and sends The BSS sends a VCC voice call indication message VCC call indication to notify it that this 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 save the information that this voice call is a voice call of the VCC;

Step 405: After receiving the VCC call indication message, the MSC or SGSN sends a response message VCC call response to the BSS in response to the received VCC call indication message, and saves the information that the voice call is a VCC voice call, or not to the BSS Send a reply message;

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

Embodiment five:

This embodiment is an IMS voice call. In the calling scenario, the UE determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then reports the determination result to the core network element-MME, specifically The process is shown in Figure 5:

Steps 501-502: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW);

Steps 503-504: When the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK to the IM CN Subsystem through the PDN GW;

Step 505: When the UE receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the indication information of the VCC voice call VCC Anchored Indication, then determine that the voice call is a VCC voice call, and send a VCC voice call indication message VCC call indication to the MME to notify it that the voice call is a VCC voice call;

Step 506: After receiving the VCC call indication message, the MME sends a response message VCC call response to the UE in response to the received VCC call indication message, and saves the information that this voice call is a VCC voice call. the

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

Embodiment six:

This embodiment is an IMS voice call. In the calling scenario, the PDN GW determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then reports the determination result to the core network element-MME, The specific process is shown in Figure 6:

Steps 601-604: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW); when the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK through the PDN GW Send to IM CN Subsystem;

Step 605: When the PDN GW receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the indication information of the VCC voice call VCC Anchored Indication, it is determined that the voice call is a VCC voice call, and the VCC voice call indication message VCC callindication is sent to the MME to notify it that the voice call is a VCC voice call;

Step 606: After receiving the VCC call indication message, the MME sends a response message VCC call response to the PDN GW in response to the received VCC call indication message, and stores the information that this voice call is a VCC voice call. the

It should be noted that there is no fixed sequence relationship between steps 605-606 and steps 602-604, and the two can be executed serially or in parallel. the

Embodiment seven:

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

Steps 701-704: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW); when the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK through the PDN GW Send to IM CN Subsystem;

Step 705: When the PDN GW receives the voice call control signaling SIP 200OK, it parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the VCC voice call indication information VCC Anchored Indication, it is determined that the voice call is a VCC voice call, and the VCC voice call indication message VCC callindication is sent to the MME to notify it that the voice call is a VCC voice call;

Step 706: When the MME receives the VCC call indication message, it forwards the VCC call indication message to the eNodeB, and saves the information that this voice call is a VCC voice call;

Step 707: When the eNodeB receives the VCC call indication message, it sends a response message VCC call response to the MME in response to the received VCC call indication message, and saves the information that this voice call is a VCC voice call;

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

It should be noted that there is no fixed sequence relationship between steps 705-708 and steps 702-704, and the two can be executed in series or in parallel. the

Embodiment eight:

This embodiment is an IMS voice call. In the calling scenario, the PDN GW determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then reports the determination result to the access network element-eNodeB , the specific process is shown in Figure 8:

Steps 801-804: The IM CN Subsystem sends the voice call control signaling SIP 200OK to the UE through the packet data network gateway (PDN GW); when the UE receives the voice call control signaling SIP 200OK, it sends the response signaling SIP ACK through the PDN GW Send to IM CN Subsystem;

Step 805: After receiving the voice call control signaling SIP 200OK, the PDN GW parses the SIP 200OK signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the VCC voice call indication information VCC Anchored Indication, then determine that the voice call is a VCC voice call, and send a VCC voice call indication message VCC callindication to the eNodeB to notify the eNodeB that the voice call is a VCC voice call;

Step 806: After receiving the VCC call indication message, the eNodeB sends a response message VCC call response to the PDN GW in response to the received VCC call indication message, and stores the information that this voice call is a VCC voice call. the

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

Embodiment nine:

This embodiment is an IMS voice call. In the called scenario, the PDN GW determines whether the current voice call is a VCC voice call by analyzing the voice call control signaling from the IM CNSubsystem, and then determines the result by setting the indication information in the paging message Report to the core network element-MME and the access network element-eNodeB, the specific process is shown in Figure 9:

Step 901: IM CN Subsystem sends voice call control signaling SIPINVITE to PDN GW;

Step 902: After receiving the voice call control signaling SIP INVITE, the PDN GW parses the SIP INVITE signaling, if the Via field of the signaling contains the address information of the VCC AS, or the signaling contains the VCC voice call indication information VCC Anchored Indication, then determine that this voice call is a voice call of VCC, set the information Anchored Indicator indicating that this voice call is a voice call of VCC in the paging message Paging sent to MME, and send the paging message to MME;

Step 903: When the MME receives the paging message, it forwards the paging message to the eNodeB, and saves the information that this voice call is a VCC voice call;

Step 904: When the eNodeB receives the paging message, it saves the information that the current voice call is a VCC voice call. the

In this embodiment, the PDN GW uses the original paging message to notify the MME or eNodeB that the voice call is a VCC voice call, and the system does not need to add additional signaling messages, which is a preferred embodiment. Of course, in the called scenario, the PDN GW can also notify the MME or/and eNodeB by adding dedicated signaling instead of setting indication information in the original paging message, the details are the same as those in Embodiment 6, Embodiment 7 and Embodiment eight. It may also be that the UE determines whether the voice call is a VCC voice call by analyzing the voice call control signaling, and reports the determination result to the MME or/and eNodeB. The specific method is the same as that of Embodiment 1, Embodiment 3, and Embodiment 5. I won't go into details here. the

The call control signaling SIP 200OK containing the indication information of the VCC voice call in the above embodiment and its response signaling SIP ACK are only used as exemplary signaling, and may also be other call control signaling, which is not limited here. the

Embodiment ten:

This embodiment is a voice call in the CS domain. In the calling or called scenario, the VMSC reports the determination result of whether the voice call is a VCC voice call to the access network element-base station controller (BSC)/radio network controller. (RNC), the specific process is shown in Figure 10:

Step 1001: The UE initiates a voice call to the VMSC, and the VMSC determines whether the voice call is a voice call of the VCC by querying the network element of the core network, such as the GSM Service Control Function (gsmSCF) entity, and saves it determine the outcome;

Step 1002: If this voice call is a VCC voice call, the VMSC sends a VCC voice call indication VCC anchored indication message to the BSC/RNC to notify it that this voice call is a VCC voice call;

Preferably, in this step, the VMSC sends a VCC anchored indication message to the BSC/RNC after the call is established, that is, after receiving the Connect Ack message. the

Step 1003: When the BSC/RNC receives the VCC anchored indication message, it sends a response message VCC anchored response to the VMSC in response to the received VCC anchored indication message, and stores the information that this voice call is a VCC voice call. the

Referring to Figure 11, the embodiment of the present invention also provides a notification system for voice call information, the system includes:

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

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

Notification unit 1101 includes:

The first receiving unit 11011 is used to receive voice call control signaling;

The determining unit 11012 is configured to analyze the voice call control signaling to determine whether the signaling contains the address information of the VCC application server or the indication information of the VCC voice call, and if so, then determine that the voice call is a VCC voice call , otherwise, determine that this voice call is not a VCC voice call;

The indicating unit 11013 is configured to send a notification message to the network element of the access network when the determining unit determines that the voice call is a VCC voice call, and the notification message includes a voice call indicating that the voice call is a VCC voice call Information. the

The first network unit 1102 includes:

The second receiving unit 11021 is used to receive the notification sent by the notification unit;

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

The first network unit 1102 further includes:

Forwarding unit 11023, configured to forward the notification to the second network unit;

Then the system further includes:

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

The network elements of the access network include network elements in the BSS or RNC or eNodeB; the network elements of the core network include MSC or SGSN or MME. the

Referring to Figure 12, the embodiment of the present invention also provides a notification system for voice call information, the system includes:

Visit the mobile switching center 1201, after determining whether the voice call is a VCC voice call, notify the access network element of the determination result;

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

The visited mobile switching center 1201 is configured to: after the establishment of the voice call is completed, notify the network element of the access network of the determination result. the

Referring to Figure 13, an embodiment of the present invention also provides a notification device, which includes:

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

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

The indicating unit 1303 is configured to notify the network side of the determining result of the determining unit. the

Determining unit 1302 includes:

The first unit 13021 is configured to analyze the voice call control signaling to determine whether the address information of the VCC application server is contained in the signaling, and if so, determine that the current voice call is a VCC voice call; otherwise, determine that the current The voice call is not a voice call of VCC;

The second unit 13022 is configured to analyze the voice call control signaling to determine whether the signaling contains indication information of a VCC voice call, and if so, determine that the current voice call is a VCC voice call; otherwise, determine that the current voice call is a VCC voice call The voice call is not a VCC voice call. the

The specific workflow of the notification device is described below:

Step S01: The receiving unit of the notification device receives the voice call control signaling;

Step S02: The determination unit analyzes the voice call control signaling received by the receiving unit to determine whether the voice call is a VCC voice call, which can be specifically:

The first unit included in the determination unit parses the voice call control signaling, and judges whether the Via field of the signaling includes the address information of the VCC application server, and if so, determines that the voice call is a voice call of the VCC, otherwise, Determine that this voice call is not a VCC voice call; or,

The second unit included in the determining unit analyzes the voice call control signaling, and judges whether the signaling contains indication information of a VCC voice call, and if so, determines that this voice call is a VCC voice call, otherwise, determines this The second voice call is not a VCC voice call. the

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

Referring to Figure 14, an embodiment of the present invention also provides a network device, which includes:

The receiving unit 1401 is configured to receive a notification including information indicating whether the voice call is a voice call of the VCC;

The saving unit 1402 is configured to save information about whether the voice call in the notification is a voice call of the VCC when the receiving unit receives the notification. the

The device further includes:

The forwarding unit 1403 is configured to forward the notification. the

The specific workflow of the network device is described below:

Step S11: The receiving unit of the network device receives a notification containing information indicating whether the voice call is a VCC voice call;

Step S12: when the receiving unit receives the notification, the storing unit stores the information of whether the voice call is a voice call of the VCC. the

When the network device also includes a forwarding unit, the following steps may also be included:

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

In summary, the technical effects of the present invention are:

For an IMS voice call, the UE or PDN GW that receives the 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 SAE/LTE network or 2G/3G network. For the 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. Through the above solution, the network side can know whether a voice call is a VCC voice call, and then can decide whether to trigger the domain switching of the voice call initiated by the UE, so as to realize the network side's initiation control of the voice call domain switching. the

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations. the

Claims (21)

1. A notification method for voice call information, characterized in that the method comprises: The first entity that receives the voice call control signaling from the IP multimedia core network subsystem analyzes the signaling to determine whether the IP multimedia service subsystem IMS voice call is a voice call of the voice call continuity VCC, if the If the signaling includes the address information of the voice call continuity VCC application server or the indication information of the VCC voice call, the first entity determines that the IMS voice call is a VCC voice call, and notifies the network-side access network element or core network element. 2. The method according to 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, wherein 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 the 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 network element of the access network is an evolved base station eNodeB, and the network element of the core network is a mobility management network element MME. 4. The method according to claim 2, wherein when the first entity is a UE and it is determined that the voice call is a VCC voice call, the determination result is notified to the access network on the network side elements and/or core network elements, including: The UE sends a notification message to the network element of the access network, the notification message includes information indicating that the voice call is a VCC voice call; when the network element of the access network receives the notification message, save the voice call information for VCC voice calls; or, The UE sends a notification message to a core network element, and the notification message includes information indicating that the voice call is a VCC voice call; when the core network element receives the notification message, it saves the voice call as a VCC voice call information. 5. The method according to claim 4, wherein when the network element of the access network receives the notification message, the method further comprises: The network element of the access network forwards the notification message to the network element of the core network; when the network element of the core network receives the notification message, it saves the information that this voice call is a voice call of the VCC. 6. The method according to claim 2, wherein when the first entity is a PDN GW and it is determined that the voice call is a VCC voice call, the determination result is notified to the access network on the network side Network elements and/or core network elements, including: The PDN GW sends a notification message to the core network element, and the notification message includes information indicating that the voice call is a VCC voice call; when the core network element receives the notification message, it saves the voice call as VCC voice call information; or, The PDN GW sends a notification message to the network element of the access network, and the notification message includes information indicating that the voice call is a VCC voice call; when the network element of the access network receives the notification message, saves the voice call of this time Information about voice calls that are called to the VCC. 7. The method according to claim 6, wherein when the core network element receives the notification message, the method further comprises: The network element of the core network forwards the notification message to the network element of the access network; when the network element of the access network receives the notification message, it saves the information that this voice call is a voice call of the VCC. 8. The method according to claim 7, wherein the notification message is a newly added dedicated message or a paging message. 9. A notification method for voice call information, characterized in that the method comprises: The visiting mobile switching center VMSC in the circuit CS domain receives the voice call initiated by the user terminal UE. After the VMSC determines that the voice call is a voice call of the voice call continuity VCC by querying the network elements of the core network, it notifies the access network of the determination result network element. 10. The method according to claim 9, wherein the network element of the access network comprises: a base station controller (BSC) or a radio network controller (RNC). 11. The method according to claim 9, wherein the VMSC notifies the network element of the access network of the determination result after the establishment of the voice call is completed. 12. A notification system for voice call information, characterized in that the system comprises: 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: The first receiving unit is used to receive voice call control signaling from the IP multimedia core network subsystem; A determination unit, configured to determine whether the IP Multimedia Service Subsystem IMS voice call is a voice call continuity VCC voice call by analyzing the signaling received by the first receiving unit, if the signaling includes voice call continuity If the address information of the specific VCC application server or the indication information of the VCC voice call is used, then it is determined that the IMS voice call is a voice call of the VCC; and an indicating unit, configured to notify the first network unit of the result determined by the determining unit. 13. The system according to claim 12, wherein the instructing unit notifying the first network unit of the result determined by the determining unit comprises: when the determining unit determines that the voice call is a VCC voice call, the The indicating unit sends a notification message to the network element of the access network, and the notification message includes information indicating that the current voice call is a VCC voice call. 14. The system according to claim 13, wherein the first network element comprises: a second receiving unit, configured to receive the notification sent by the indicating unit; The storing unit is used for storing information of whether the voice call is a voice call of the VCC. 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; Then the system further includes: The second network unit is configured to, when receiving the notification, store information about whether the voice call in the notification is a voice call of the VCC. 16. The system according to claim 12, wherein the network element of the access network is a radio network controller RNC, and the network element of the core network is a serving GPRS support node SGSN; or The network element of the access network is a network element in the BSS, and the network element of the core network is a mobile switching center MSC or a serving GPRS support node SGSN; or The network element of the access network is an evolved base station eNodeB, and the network element of the core network is a mobility management network element MME. 17. The system according to claim 12, wherein the notification unit is a user terminal UE or a packet data network gateway PDN GW. 18. A notification system for voice call information, characterized in that the system comprises: Visiting the mobile switching center, for receiving the voice call initiated by the user terminal UE, and after determining that the voice call is a voice call of the voice call continuity VCC by querying the core network element, notifying the access network element of the determination result; The network element of the access network is configured to save information that the voice call in the notification is a voice call of the VCC when receiving the notification. 19. The system according to claim 18, wherein the visited mobile switching center is configured to: notify the network element of the access network of the determination result after the current voice call is established. 20. The system according to claim 18, wherein the network element of the access network comprises: a base station controller (BSC) or a radio network controller (RNC). 21. A notification device, characterized in that the device comprises: A receiving unit, configured to receive voice call control signaling from the IP multimedia core network subsystem; A determining unit, configured to determine whether the IP Multimedia Service Subsystem IMS voice call is a voice call of voice call continuity VCC by analyzing the voice call control signaling, if the voice call continuity VCC application server is included in the signaling address information or VCC voice call indication information, it is determined that the IMS voice call is a VCC voice call; A notification unit, configured to notify a network element of the access network or a network element of the core network on the network side of the determination result of the determination unit.

Images