CN104038974A - Method and device for processing voice service - Google Patents

Abstract

The invention discloses a voice service processing method and device, relates to the technical field of communication networks, and is used to solve the problem of how to switch between an LTE network and a wireless local area network in an IMS domain. In the embodiment of the present invention, by receiving the IMS secondary registration request sent by the UE, the IMS secondary registration request includes the first IP address, IMPI and IMPU, and the first access network type, and the first IP address corresponds to the first access network type. the IP address; associate the first IP address with IMPI, IMPU, and the first access network type; create a first mapping rule, and establish a first media plane traffic link corresponding to the first IP address. The solution provided by the embodiment of the present invention is suitable for voice service establishment and switching.

Description

Method and device for processing voice services

technical field

The invention relates to the technical field of communication networks, in particular to a voice service processing method and device.

Background technique

With the increasing number of broadband communication and Wireless Fidelity (Wireless Fidelity, WiFi) access points, and the increasing popularity of Internet telephony (Voice over Internet Protocol, VoIP), the integration of wireless network technology and VoIP (VoIP-over -Wi-Fi, VoWiFi) voice call service. The VoWiFi voice call service has advantages such as low tariffs, so that users will preferentially choose the VoWiFi voice call service for voice calls.

Since the VoWiFi voice call service needs to be performed under a wireless local area network, users need to consider their location when using the VoWiFi voice call service. In the prior art, when the user is outside the coverage of the wireless local area network, he usually uses the Voice over Long Term Evolution (VoLTE) voice call service, and when he is within the coverage of the wireless local area network, he can use the VoWiFi voice call service .

However, when the user is in a voice call, the location of the UE changes from outside the coverage of the WLAN to within the coverage of the WLAN, or from within the coverage of the WLAN to the location covered by the WLAN Otherwise, you can only use another voice service to make voice calls by hanging up the phone, but you cannot switch between the LTE network and the wireless local area network without hanging up the voice call, that is, when the terminal has VoLTE In the case of the WiFi function and the WiFi function, when performing voice services, switching between the LTE network and the wireless local area network cannot be performed.

Contents of the invention

Embodiments of the present invention provide a voice service processing method and device for solving the problem of how to switch between an LTE network and a wireless local area network in an IMS domain.

On the one hand, an embodiment of the present invention provides a voice service processing method, including:

The network side device receives the Internet protocol multimedia subsystem IMS secondary registration request sent by the user equipment UE, and the IMS secondary registration request includes the first access network type, the first Internet protocol IP address, the Internet protocol multimedia private identifier IMPI and Internet Protocol Multimedia Public Identity IMPU, the first access network type is the network type currently accessed by the UE, and the first IP address is an IP address corresponding to the first access network type;

The network side device associates the first IP address with the IMPI, the IMPU, and the first access network type;

The network side device creates a first mapping rule, and establishes a first media plane traffic link corresponding to the first IP address, and the first mapping rule is for mapping the IP address of the sending and receiving data packets of the UE According to the rule, the first media plane traffic link is a media plane traffic link between the network side device and the UE under the first access network corresponding to the first access network type.

In another embodiment of the present invention, the first access network type is a wireless local area network type or a long-term evolution LTE network type, and the second access network type is the LTE network type or a wireless local area network type; when the When the second access network type is the LTE network type, the first access network type is the wireless local area network type, and when the second access network type is the wireless local area network type, the The first access network type is the LTE network type, and the second access network type is a network type corresponding to the UE's original access network.

In another embodiment of the present invention, when the second access network type is the LTE network type and the first access network type is the wireless local area network type, the IMS secondary registration request Also includes the VoWiFi logo;

Before the network side device associates the first IP address with the IMPI, the IMPU, and the first access network type, the method further includes:

The network side device detects whether the VoWiFi identifier is carried in the IMS secondary registration request, and the VoWiFi identifier is an identifier for the UE to request a wireless network voice service;

When detecting that the VoWiFi identifier is carried in the IMS secondary registration request, the network side device associates the first IP address with the IMPI, the IMPU, and the first access network type.

In another embodiment of the present invention, after the network side device associates the first IP address with the IMPI, the IMPU, and the first access network type, the method further includes:

The network side device sets the priority of the first IP address higher than the priority of the second IP address.

In another embodiment of the present invention, the sending and receiving data packets of the UE include uplink data packets and downlink data packets;

The first mapping rule includes: when the source IP address of the uplink data packet is the first IP address and the destination IP address of the downlink data packet is the second IP address, the network side device will receiving and mapping the source IP address of the uplink data packet sent by the UE to a second IP address, and mapping the destination IP address of the received downlink data packet to the first IP address, and the second IP address is an IP address corresponding to the second access network type;

Before the network side device receives the Internet Protocol Multimedia Subsystem IMS secondary registration request sent by the user equipment UE, the method further includes:

When the UE establishes a voice call with the remote UE through the second access network corresponding to the second access network type, the network side device establishes the second media plane corresponding to the second IP address A traffic link, wherein the second media plane traffic link is a media plane traffic link between the network side device and the UE under the second access network.

In another embodiment of the present invention, after the network side device creates a first mapping rule, and establishes a first media plane traffic link corresponding to the first IP address according to the first mapping rule, the method Also includes:

The network side device removes the second media plane traffic link.

On the other hand, an embodiment of the present invention provides a voice service processing device, including:

The receiving module is configured to receive the Internet Protocol Multimedia Subsystem IMS secondary registration request sent by the user equipment UE, and provide the IMS secondary registration request to the association module, and the IMS secondary registration request includes the first access network type, a first Internet Protocol IP address, an Internet Protocol Multimedia Private Identity IMPI, and an Internet Protocol Multimedia Public Identity IMPU, the first access network type is the network type currently accessed by the UE, and the first IP address is the The IP address corresponding to the first network type;

The associating module is configured to associate the first IP address with the IMPI, the IMPU, and the first access network type, and inform the creation module that the IMPI, the IMPU, and the IMPU have been associated with the The first IP address is associated with the first access network type;

The creating module is configured to create a first mapping rule, where the first mapping rule is a rule for mapping the IP address of the sending and receiving data packets of the UE;

An establishment module, configured to establish a first media plane traffic link corresponding to the first IP address, where the first media plane traffic link is established under the first access network corresponding to the first access network type A media plane traffic link between the network side device and the UE.

In another embodiment of the present invention, the first access network type is a wireless local area network type or a long-term evolution LTE network type, and the second access network type is the LTE network type or a wireless local area network type; when the When the second access network type is the LTE network type, the first access network type is the wireless local area network type, and when the second access network type is the wireless local area network type, the The first access network type is the LTE network type, and the second access network type is the network type corresponding to the UE's original access network;

When the second access network type is the LTE network type and the first access network type is the wireless local area network type, the IMS secondary registration request further includes a VoWiFi identifier;

The device also includes: a detection module and a setting module;

The detection module is configured to detect whether the IMS secondary registration request contains the following when the second access network type is the LTE network type and the first access network type is the wireless local area network type. Carrying the VoWiFi ID, and providing the detection result to the association module, the VoWiFi ID is the ID of the UE requesting a wireless network voice service;

The associating module is specifically configured to associate the first IP address with the IMPI, the IMPU, and the first interface when the detection result is that the VoWiFi identifier is carried in the IMS secondary registration request. Incoming network type for association;

The setting module is configured to set the first IP address when the second access network type is the LTE network type and the first access network type is the wireless local area network type The priority is higher than that of the second IP address.

In another embodiment of the present invention, the sending and receiving data packets of the UE include uplink data packets and downlink data packets;

The first mapping rule includes: when the source IP address of the uplink data packet is the first IP address and the destination IP address of the downlink data packet is the second IP address, the network side device will receiving and mapping the source IP address of the uplink data packet sent by the UE to a second IP address, and mapping the destination IP address of the received downlink data packet to the first IP address, and the second IP address is an IP address corresponding to the second access network;

The establishing module is further configured to establish a second IP address corresponding to the second IP address when the UE establishes a voice call with the remote UE through the second access network corresponding to the second access network type. Two media plane traffic links, wherein the second media plane traffic link is a media plane traffic link between the network side device and the UE under the second access network.

In another embodiment of the present invention, the method further includes: removing the module;

The removal module is configured to remove the second media plane traffic link.

In the voice service processing method and device provided by the embodiment of the present invention, in the present invention and the prior art, when the user is in the process of voice conversation, the location of the UE changes from outside the wireless local area network coverage location to the wireless local area network coverage location When within the coverage of the wireless local area network, or from within the coverage of the wireless local area network to outside the coverage of the wireless local area network, you can only use another voice service to make a voice call by hanging up the phone, but you cannot hang up the voice call Next, compared with the solution for switching between the LTE network and the wireless local area network, the present invention receives the IMS secondary registration request sent by the UE, and then combines the IP address corresponding to the wireless local area network in the IMS secondary registration request with the IMPI , IMPU and access network type to associate, create an address mapping rule for establishing a media plane traffic link corresponding to the IP address of the wireless local area network, so as to map the address of the data packet sent and received by the UE to the IP address corresponding to the wireless local area network, In this way, the purpose of switching between the wireless local area network and the LTE network can be achieved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a logic structure of a voice service processing system provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a voice service processing method provided by an embodiment of the present invention;

FIG. 3 is a flowchart of another voice service processing method provided by an embodiment of the present invention;

Fig. 4 is a logical schematic diagram in a voice service processing method provided by an embodiment of the present invention;

FIG. 5 is a flowchart of another voice service processing method provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a logical structure of a voice service processing device provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a logic structure of another apparatus for processing voice services provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The terms "component", "module", "system" and the like are used in this specification to denote a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.

Furthermore, various aspects or features of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application covers a computer program accessible from any computer readable device, carrier or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or tapes, etc.), optical disks (e.g., compact disks (Compact Disk, CD), digital versatile disks (Digital Versatile Disk, DVD) etc.), smart cards and flash memory devices (for example, Erasable Programmable Read-Only Memory (EPROM), card, stick or key drive, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

As shown in FIG. 1 , the embodiment of the present invention is applicable to a voice service processing system 10 , and the system 10 includes a network side device 101 and a UE 102 .

The network-side device 101 is configured to receive an Internet Protocol Multimedia Subsystem (Internet Protocol Multimedia Subsystem, IMS) secondary registration request sent by the UE 102, and the IMS secondary registration request includes the first access network type, the first Internet protocol (Internet Protocol, IP) address, Internet Protocol Multimedia Private Identity (Internet Protocol Multimedia Private Identity, IMPI) and Internet Protocol Multimedia Public Identity (Internet Protocol Multimedia Public Identity, IMPU), the first IP address is the IP corresponding to the first access network type address; associate the first IP address with IMPI, IMPU, and the first access network type; create a first mapping rule, establish a first media plane traffic link corresponding to the first IP address according to the first mapping rule, and first map The rule is a rule for mapping the IP address of the sending and receiving data packets of the UE, and the first media plane traffic link is the media plane between the network side device 101 and the UE 102 under the first access network corresponding to the first access network type traffic link.

The sending and receiving data packets of the UE include uplink data packets and downlink data packets.

The UE 102 is configured to send an IMS secondary registration request to the network side device 101 after detecting that it is within the coverage of the first access network and obtaining the first IP address corresponding to the first access network.

The network side device receives the IMS secondary registration request sent by the UE, and then associates the IP address corresponding to the first access network type in the IMS secondary registration request with the IMPI, IMPU, and the first access network type to create an Establish the address mapping rule of the media plane flow link corresponding to the IP address of the wireless local area network, so as to achieve the purpose of switching between the wireless local area network and the LTE network.

Further, before the network side device 101 receives the IMS secondary registration request sent by the UE 102:

When the UE establishes a voice call with the remote UE through the second access network, the network side device 101 establishes a second media plane traffic link corresponding to the second IP address, where the second media plane traffic link is A media plane traffic link between the network side device and the UE under the second access network. The second access network is a network type corresponding to the original access network of the UE.

Then, the first mapping rule includes: when the source IP address of the uplink data packet is the first IP address and the destination IP address of the downlink data packet is the second IP address, the network side device 101 will receive the source IP address of the uplink data packet sent by the UE. The IP address is mapped to the second IP address, the destination IP address of the received downlink data packet is mapped to the first IP address, and the second IP address is an IP address corresponding to the second access network.

Referring to FIG. 1, as shown in FIG. 2, an embodiment of the present invention provides a voice service processing method, which includes:

201. The network side device receives the IMS secondary registration request sent by the UE. The IMS secondary registration request includes the first access network type, the first IP address, IMPI and IMPU, and the first access network type is the UE's current access network. Network type, the first IP address is the IP address corresponding to the first access network type.

202. The network side device associates the first IP address with the IMPI, the IMPU, and the first access network type.

203. The network side device creates a first mapping rule, and establishes a first media plane traffic link corresponding to the first IP address. The first mapping rule is a rule for mapping the IP address of the UE sending and receiving data packets. The first media plane The traffic link is a media plane traffic link between the network side device and the UE under the first access network corresponding to the first access network type.

The voice service processing method provided by the embodiment of the present invention, the present invention and the prior art When the user is in the process of voice communication, the location of the UE changes from outside the coverage of the wireless local area network to within the coverage of the wireless local area network , or when changing from within the coverage of the wireless local area network to outside the coverage of the wireless local area network, you can only use another voice service to make a voice call by hanging up the phone, but you cannot continue to hang up the voice call. Compared with the solution for switching between the LTE network and the wireless local area network, the present invention receives the IMS secondary registration request sent by the UE, and then combines the IP address corresponding to the wireless local area network in the IMS secondary registration request with the IMPI and IMPU Associate with the type of access network, and create an address mapping rule for establishing the media plane traffic link corresponding to the IP address of the wireless local area network, so that the address of the data packet sent and received by the UE is mapped to the IP address corresponding to the wireless local area network, so as to achieve The purpose of switching between the wireless local area network and the LTE network.

It should be further noted that the first access network type is a wireless local area network type or an LTE network type, and the second access network type is an LTE network type or a wireless local area network type; when the second access network type is an LTE network type , the first access network type is a wireless local area network type, and when the second access network type is a wireless local area network type, the first access network type is an LTE network type.

Further, before step 201, the method also includes:

When the UE establishes a voice call with the remote UE through the second access network, the network side device establishes a second media plane traffic link corresponding to the second IP address.

Wherein, the second media plane traffic link is a media plane traffic link between the network side device and the UE under the second access network.

Through the above method, it can be obtained that the first mapping rule includes: when the source IP address of the uplink data packet is the first IP address and the destination IP address of the downlink data packet is the second IP address, the network side device will receive the The source IP address of the uplink data packet is mapped to the second IP address, and the destination IP address of the received downlink data packet is mapped to the first IP address, and the second IP address is the IP address of the second access network.

It can be seen that in the prior art, when the network carrying the voice service of the UE is switched, the remote UE that is talking with the UE needs to perform media update (the media update includes updating the IP address of the peer UE), thus appearing Speech delay. In the present invention, the first mapping rule can be used when the network carrying the voice service of the UE changes, and the remote UE that establishes a voice call with the UE does not need to update the media in real time, thereby reducing the voice delay during network switching , to ensure the continuity of the voice. And it can prevent the UE from performing media update due to network switching (media update includes updating the IP address of the UE).

Further, when the UE establishes a voice call with the remote UE through the second access network, the network side device will receive the IMS initial registration request sent by the UE, and the IMS initial registration request includes the second access network type, Second IP address, IMPI and IMPU. Then the network side device associates the second IP address with the IMPI, the IMPU, and the second access network type.

Further, in step 202, when the network side device receives the IMS secondary registration request, it needs to check the information in the IMS secondary registration request, and check whether the first IP address is legal (check the first IP address The legitimate device can be a network side device or a metropolitan area network device).

When the UE is switching from the LTE network to the WLAN, the network side device also needs to detect whether the IMS secondary registration request carries the VoWiFi identifier. When the first IP address is legal and carries the VoWiFi identifier, the network side device associates the first IP address with the IMPI, the IMPU, and the first access network type (wireless local area network type).

It should be noted that, in step 202: when it is detected that the VoWiFi identifier is carried in the IMS secondary registration request, after the network side device associates the first IP address with the IMPI, IMPU, and the first access network type, the network side device sets The priority of the first IP address is set higher than the priority of the second IP address, so that when the UE is under the overlapping coverage of the LTE network and the wireless local area network, the network side device preferentially uses the first IP address corresponding to the wireless local area network. Media plane traffic link.

The following Table 1 is a schematic way of associating user information stored by the network side device:

IMPI IMPU Access network type IP address priority IMPI_a IMPU_a LTE IP_1 2 IMPI_a IMPU_a WiFi IP_2 1

Table 1

It can be seen that in Table 1, the original access network is an LTE network. IMPI is IMPI_a and IMPU is IMPU_a. The first IP address is IP_2, and the second IP address is IP_1. The priority (1) of the first IP address>the priority (2) of the second IP address. In this embodiment, the number 1 of the priority is the highest priority, and then the priority levels are lowered sequentially in numerical order.

Further optionally, after step 203, the network side device disconnects the second media plane traffic link.

After the second media plane traffic link is removed by the network side device, when the UE and the remote UE conduct a voice call under the wireless local area network, only the first media plane traffic link can be used to transmit the sending and receiving data packets of the UE. Therefore, the problem that the user does not perceive the bearer network switching from the wireless local area network to the original access network (LTE network) during the call can be avoided, resulting in an increase in call charges.

It can be understood that when the network side device removes the traffic link of the second media plane, the second IP address will not disappear along with the disappearance of the traffic link of the second media plane. This is because when the UE is connected to the LTE network, it will be assigned a dynamic public network IP address (the second IP address). Only when the UE is disconnected from the LTE network, the assigned IP address (the second IP address) address) will disappear.

Further optionally, after step 203, when the first access network is a wireless local area network, when the network side device detects that the UE moves out of the coverage of the wireless local area network, it starts to switch from the first media plane traffic link to When the second media plane traffic link is used to transmit the sending and receiving data packets of the UE, a prompt message is sent to the UE, where the prompt message is used to prompt that the user holding the UE has now moved out of the wireless local area network. Through the prompt message, it is convenient for the user holding the UE to know in a timely manner that the bearer network is switched from the wireless local area network to the original access network (LTE network). The user holding the UE can choose to continue the call under the original access network, or hang up the call, or move to the coverage area of the wireless local area network. This method can also avoid the problem that the user does not perceive the bearer network to be switched from the wireless local area network to the original access network (LTE network) during the call, which causes the increase of the call fee.

It should be further noted that, in this embodiment, the network side device may be a device jointly established by a Proxy-Call Session Control Function (P-CSCF) and a Session Border Controller (SessionBorder Controller, SBC), The P-CSCF and the SBC are connected through a user network side interface (User Networks Interface, UNI), or the network side devices are the P-CSCF and the SBC.

When the network side devices are P-CSCF and SBC, a voice service processing method provided by the present invention may be shown in FIG. 3 .

301. The P-CSCF receives an IMS initial registration request sent by a UE.

The IMS initial registration request includes a second access network type, a second IP address, an IMPI and an IMPU, and the second IP address is an IP address corresponding to the second access network.

It should be noted that, in this embodiment, the first access network is a wireless local area network and the second access network is LTE as an example for description.

302. When detecting that the second IP address is legal, the P-CSCF associates the second IP address with the IMPI, the IMPU, and the second access network type.

303. The P-CSCF sends an IMS initial registration reply to the UE.

304. The P-CSCF receives the INVITE request sent by the UE, the P-CSCF establishes a voice call, and sends the UE established voice service to the SBC.

305. The SBC establishes a second media plane traffic link.

306. After the UE moves into the coverage of the first access network and acquires the first IP address corresponding to the first access network, send an IMS secondary registration request to the P-CSCF.

The IMS secondary registration request includes the first access network type, the first IP address, VoWIFI identifier, IMPI and IMPU.

307. The P-CSCF receives the IMS secondary registration request sent by the UE.

308. The P-CSCF detects the information in the IMS secondary registration request.

Specifically, the P-CSCF checks whether the second IP address is legal, and when the first IP address is legal, detects whether the VoWiFi identifier is carried in the IMS secondary registration request. When the first IP address is legal and the IMS secondary registration request carries the VoWiFi identifier, continue to execute step 309 .

309. When the first IP address is valid and the VoWiFi identifier is carried in the IMS secondary registration request, the P-CSCF associates the first IP address with IMPI, IMPU, and the first access network type, and sets the first IP address The priority of the IP address is higher than that of the second IP address.

310. The P-CSCF creates a first mapping rule and sends the first mapping rule to the SBC.

311. The SBC establishes a first media plane traffic link corresponding to the first IP address.

It can be understood that after the SBC establishes the first media plane traffic link, the SBC receives the uplink data packet sent by the UE through the first media plane traffic link, and maps the relevant IP address in the uplink data packet according to the first mapping rule ( source IP address), and then sent to MSC. Similarly, the SBC receives the downlink data packet initiated by the remote UE sent by the MSC, and maps the relevant IP address (destination IP address) in the downlink data packet according to the first mapping rule, and then passes the mapped downlink data packet through the first mapping rule. The media plane traffic link is sent to the UE.

312. The SBC removes the second media plane traffic link.

It should be noted that this step is optional.

313. After the call between the UE and the remote UE ends, the P-CSCF initiates a logout procedure.

Specifically, after the call between the UE and the remote UE ends, the UE at the end of the call sends a BYE message to the P-CSCF on the network side. The BYE message is used to remove all media plane traffic links (the first media plane traffic link and/or second media plane traffic link).

The invention can realize the problem of switching between the LTE network and the wireless local area network in the IMS domain. In addition, in the process of handover between the LTE network and the WLAN in the IMS domain, the voice delay can be reduced to ensure the continuity of the voice, and at the same time, it can prevent the user from unaware of the bearer network switching from the WLAN to the original WLAN during the call. Access to the network (LTE network) leads to an increase in call charges.

As shown in Figure 4, Figure 4 is a schematic diagram of the switching logic between the LTE network and the wireless local area network. From Figure 4, it can be seen that when the UE is in the LTE network, the second media plane traffic is established between the UE and the network side device Link: when the UE is in the wireless local area network, the first media plane traffic link is established between the UE and the network side device.

As shown in Figure 5, the present invention provides another embodiment of the voice service processing method, wherein the IMPI of the UE is 460011100612345bj.ims.chinaunicom.cn, the IMPU is sip: 460011100612345bj.ims.chinaunicom.cn, and it subscribes to the VoLTE service and VoWiFi services; the home of the user holding the UE opens the fixed-line broadband service, and uses the fixed-line access to build a home wireless local area network through the wireless router equipment. P-CSCF and SBC are jointly established, and the UNI interface address is 192.221.11.9.

501, the user holding the UE is in the coverage area of the outdoor LTE network, the UE attaches to the LTE network, and is allocated by the public data network gateway (Public Data Network Gateway, P-GW) to obtain an IP address 192.6.21.173, and obtains the P-CSCF /SBC address 192.221.11.9.

It can be seen that 192.6.21.173 is the second IP address.

502. The UE sends an IMS initial registration request to the P-CSCF/SBC.

503. The P-CSCF/SBC sends an IMS initial registration request reply to the UE.

504. The user holding the UE makes a call, and sends an INVITE message to the P-CSCF/SBC with the IP address 192.221.11.9, and the P-CSCF/SBC follows the standard IMS call establishment process to establish a media channel.

505. The P-CSCF/SBC establishes a second media plane traffic link.

506. The user holding the UE returns home and enters the coverage area of the wireless local area network. The UE automatically accesses the wireless local area network and obtains an IP address of 192.168.1.102.

It can be seen that the IP address 192.168.1.102 is the first IP address.

507. The UE sends an IMS secondary registration request to the P-CSCF/SBC through the IP address 192.168.1.102.

Among them, the contact parameter carried in the IMS secondary registration request header indicates that the registered business capability is VoWiFi:

The IMS secondary registration request can be:

REGISTER sip: registrar.bj.ims.chinaunicom.cn SIP/2.0

From: <sip: 460011100612345bj.ims.chinaunicom.cn>;

To: <sip: 460011100612345bj.ims.chinaunicom.cn>;

Contact:<sip:192.168.1.102:5060>;+g.3gpp.vowifi;

Authorization:Digest username="460011100612345bj.ims.chinaunicom.cn";

realm = "registrar.bj.ims.chinaunicom.cn", nonce = ";

uri="sip:registrar.bj.ims.chinaunicom.cn", response=".

In this request, the contents of the To message header and From message header include IMPU, the Username parameter in the Authorization message header contains IMPI, the content of the home network domain name REGISTER message header contains the home network domain name (P-CSCF/SBC domain name), and the Contact message header The content in contains IP address information; in addition, the request carries "+g.3gpp.vowifi" as the VoWiFi identifier in the Contact message header.

508. The P-CSCF/SBC detects the information in the IMS secondary registration request.

The P-CSCF/SBC verifies whether the IP address 192.168.1.102 is legal, and when the IP address 192.168.1.102 is legal, detects whether the IMS secondary registration request carries the VoWiFi identifier. When the IP address 192.168.1.102 is valid and the IMS secondary registration request carries the VoWiFi identifier, continue to step 509 .

509. The P-CSCF/SBC associates the IMPI as "460011100612345bj.ims.chinaunicom.cn", the IMPU as "sip: 460011100612345bj.ims.chinaunicom.cn", and the access network type WiFi with the IP address 192.168.1.102.

In addition, the P-CSCF/SBC finds that the IMS user whose IMPI is "460011100612345bj.ims.chinaunicom.cn" and whose IMPU is "sip: 460011100612345bj.ims.chinaunicom.cn" has completed registration, and its IP address is 192.6.21.173. When the network type is LTE, the P-CSCF/SBC sets an association table (refer to Table 1 above), and sets the priority of 192.168.1.102 higher than that of 192.6.21.173.

When the IP address 192.168.1.102 is legal, the P-CSCF/SBC saves the IP address 192.168.1.102 for the user, replaces the source IP address of the upstream RTP data packet whose source address is 192.168.1.102 with 192.6.21.173, and The packet is forwarded to the opposite end; the destination address of the downlink data packet whose destination address is 192.6.21.173 is replaced with 192.168.1.102 and forwarded to the terminal.

510. The P-CSCF/SBC creates a first mapping rule, and establishes a first media plane traffic link corresponding to the IP address 192.168.1.102.

In this step, the first mapping rule is: P-CSCF/SBC replaces the source IP address of the uplink data packet whose user source address is 192.168.1.102 with 192.6.21.173, and forwards the data packet to the opposite end; The destination address of the downlink data packet of 192.6.21.173 is replaced with 192.168.1.102 and forwarded to the terminal.

511. The P-CSCF/SBC removes the second media plane traffic link.

It should be noted that this step is optional.

512. After the call ends, the P-CSCF/SBC initiates a logout procedure.

The invention can realize the problem of switching between the LTE network and the wireless local area network in the IMS domain. In addition, during the handover process between the LTE network and the wireless local area network in the IMS domain, the voice delay can be reduced to ensure the continuity of the voice, and at the same time, it can prevent the user from being unaware that the bearer network is switched from the wireless local area network to the original network during the call. Access to the network (LTE network) leads to an increase in call charges.

As shown in FIG. 6 , the present invention provides a voice service processing device 60 . The device 60 includes a receiving module 601 , an associating module 602 , a creating module 603 and a building module 604 .

Wherein, the receiving module 601 is configured to receive the IMS secondary registration request sent by the UE, and provide the IMS secondary registration request to the association module 602. The IMS secondary registration request includes the first access network type, the first IP address, IMPI and IMPU, the first IP address is the IP address corresponding to the first access network type.

The associating module 602 is configured to associate the first IP address with IMPI, IMPU, and the first access network type, and inform the creation module 603 that the IMPI, IMPU has been associated with the first IP address, and the first access network type.

The creating module 603 is configured to create a first mapping rule, where the first mapping rule is a rule for mapping the IP address of the sending and receiving data packets of the UE.

The sending and receiving data packets of the UE include uplink data packets and downlink data packets.

Specifically, the first mapping rule includes: when the source IP address of the uplink data packet is the first IP address and the destination IP address of the downlink data packet is the second IP address, the network side device will receive the source IP address of the uplink data packet sent by the UE. The IP address is mapped to the second IP address, the destination IP address of the received downlink data packet is mapped to the first IP address, the second IP address is the IP address of the second access network, and the type of the second access network is the original UE The network type corresponding to the incoming network.

Establishing module 604, configured to establish a first media plane traffic link corresponding to the first IP address, where the first media plane traffic link is between the network side device and the UE under the first access network corresponding to the first access network type The media plane traffic link between them.

Furthermore, the present invention also provides another voice service processing device 70, as shown in FIG.

Wherein, when the second access network type is the LTE network type, and the first access network type is the wireless local area network type, the detection module 605 is used to detect whether the VoWiFi logo is carried in the IMS secondary registration request, and provide the detection result For the associating module 602, the VoWiFi ID is the ID of the UE requesting the wireless network voice service. Then, when the detection result is that the VoWiFi identifier is carried in the IMS secondary registration request, the associating module 602 associates the first IP address with the IMPI, IMPU, and the first access network type.

The removal module 606 is configured to remove the traffic link of the second media plane. It is worth noting that before the receiving module 601 receives the IMS secondary registration request, the establishing module 604 is also used to establish the second IP address correspondence when the UE establishes a voice call with the remote UE through the second access network. The second media plane traffic link, where the second media plane traffic link is a media plane traffic link between the network side device and the UE under the second access network.

And, before the receiving module 601 receives the IMS secondary registration request, the associating module 602 is further configured to associate the second IP address with the IMPI, IMPU, and the second access network type. So after the association module 602 associates the first IP address with IMPI, IMPU, and the first access network type, when the second access network type is the LTE network type, and the first access network type is the wireless local area network type, set The determining module 607 sets the priority of the first IP address higher than the priority of the second IP address. That is, the IP address corresponding to the wireless local area network has a higher priority than the IP address corresponding to the LTE network.

The invention can realize the problem of switching between the LTE network and the wireless local area network in the IMS domain. In addition, during the handover process between the LTE network and the wireless local area network in the IMS domain, the voice delay can be reduced to ensure the continuity of the voice, and at the same time, it can prevent the user from being unaware that the bearer network is switched from the wireless local area network to the original network during the call. Access to the network (LTE network) leads to an increase in call charges.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to needs. The internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. a processing method for speech business, is characterized in that, comprising:

Network equipment receives the internet protocol multi-media sub-system IMS Layer 2 registration request that user equipment (UE) sends, the request of described IMS Layer 2 registration comprises the first access network type, the first Internet protocol IP address, the privately owned mark IMPI of internet protocol multi-media and internet protocol multi-media public identifier IMPU, described the first access network type is the network type of the current access of described UE, and a described IP address is IP address corresponding to described the first access network type;

Described network equipment carries out associated by a described IP address with described IMPI, described IMPU, described the first access network type;

Described network equipment creates the first mapping ruler, and set up the first medium surface flow link corresponding to a described IP address, described the first mapping ruler is the rule that the IP address of the transceiving data bag of described UE is shone upon, and described the first medium surface flow link is the medium surface flow link between described network equipment and described UE under the first access network corresponding to described the first access network type.

2. the processing method of speech business according to claim 1, it is characterized in that, described the first access network type is WLAN type or Long Term Evolution LTE network type, and the second access network type is described LTE network type or WLAN type; In the time that described the second access network type is described LTE network type, described the first access network type is described WLAN type, in the time that described the second access network type is described WLAN type, described the first access network type is described LTE network type, wherein, described the second access network type is network type corresponding to the former access network of described UE.

3. the processing method of speech business according to claim 2, it is characterized in that, when described the second access network type is described LTE network type, when described the first access network type is described WLAN type, in the request of described IMS Layer 2 registration, also comprise VoWiFi mark;

Described network equipment a described IP address and described IMPI, described IMPU, described the first access network type are carried out associated before, described method also comprises:

Described network equipment detects in the request of described IMS Layer 2 registration whether carry described VoWiFi mark, and described VoWiFi is designated described UE and asks the mark of carrying out wireless network speech business;

When detecting that while carrying described VoWiFi mark in the request of described IMS Layer 2 registration, described network equipment carries out associated by a described IP address with described IMPI, described IMPU, described the first access network type.

4. the processing method of speech business according to claim 3, is characterized in that, described network equipment a described IP address and described IMPI, described IMPU, the first access network type are carried out associated after, described method also comprises:

Described network equipment is set the priority of a described IP address higher than the priority of described the 2nd IP address.

5. the processing method of speech business according to claim 4, is characterized in that, the transceiving data handbag of described UE is drawn together upstream data bag and downlink data packet;

Described the first mapping ruler comprises: when the source IP address of described upstream data bag is a described IP address, when the object IP address of described downlink data packet is described the 2nd IP address, the source IP address of the described upstream data bag that receives described UE transmission is mapped as the 2nd IP address by described network equipment, the object IP address of the described downlink data packet receiving is mapped as to a described IP address, and described the 2nd IP address is IP address corresponding to described the second access network type;

Receive the internet protocol multi-media sub-system IMS Layer 2 registration request of user equipment (UE) transmission at described network equipment before, described method also comprises:

Set up between far-end UE in audio call at described UE the second access network corresponding by described the second access network type, described network equipment is set up the second medium surface flow link corresponding to described the 2nd IP address, wherein, described the second medium surface flow link is the medium surface flow link between described network equipment and described UE under described the second access network.

6. the processing method of speech business according to claim 5, it is characterized in that, create the first mapping ruler at described network equipment, after setting up the first medium surface flow link corresponding to a described IP address according to described the first mapping ruler, described method also comprises:

Described network equipment is removed described the second medium surface flow link.

7. a processing unit for speech business, is characterized in that, comprising:

Receiver module, the internet protocol multi-media sub-system IMS Layer 2 registration request sending for receiving user equipment (UE), and the request of described IMS Layer 2 registration is offered to relating module, the request of described IMS Layer 2 registration comprises the first access network type, the first Internet protocol IP address, the privately owned mark IMPI of internet protocol multi-media and internet protocol multi-media public identifier IMPU, described the first access network type is the network type of the current access of described UE, and a described IP address is IP address corresponding to described first network type;

Described relating module, associated for a described IP address and described IMPI, described IMPU, described the first access network type are carried out, and inform that creation module is by described IMPI, described IMPU and a described IP address, described the first access network type association;

Described creation module, for creating the first mapping ruler, described the first mapping ruler is the rule that the IP address of the transceiving data bag of described UE is shone upon;

Set up module, for setting up the first medium surface flow link corresponding to a described IP address, described the first medium surface flow link is the medium surface flow link between described network equipment and described UE under the first access network corresponding to described the first access network type.

8. the processing unit of speech business according to claim 7, it is characterized in that, described the first access network type is WLAN type or Long Term Evolution LTE network type, and the second access network type is described LTE network type or WLAN type; In the time that described the second access network type is described LTE network type, described the first access network type is described WLAN type, in the time that described the second access network type is described WLAN type, described the first access network type is described LTE network type, and described the second access network type is network type corresponding to the former access network of described UE;

When described the second access network type is described LTE network type, when described the first access network type is described WLAN type, in the request of described IMS Layer 2 registration, also comprise VoWiFi mark;

Described device also comprises: detection module, setting module;

Described detection module, be described LTE network type for working as described the second access network type, when described the first access network type is described WLAN type, detect and in the request of described IMS Layer 2 registration, whether carry described VoWiFi mark, and testing result is offered to described relating module, described VoWiFi is designated described UE and asks the mark of carrying out wireless network speech business;

Described relating module, specifically for being, while carrying described VoWiFi mark in the request of described IMS Layer 2 registration, a described IP address to be carried out associated with described IMPI, described IMPU, described the first access network type when described testing result;

Described setting module, for being described LTE network type when described the second access network type, when described the first access network type is described WLAN type, sets the priority of a described IP address higher than the priority of described the 2nd IP address.

9. according to the processing unit of the speech business described in any one in claim 7-8, it is characterized in that, the transceiving data handbag of described UE is drawn together upstream data bag and downlink data packet;

Described the first mapping ruler comprises: when the source IP address of described upstream data bag is a described IP address, when the object IP address of described downlink data packet is described the 2nd IP address, the source IP address of the described upstream data bag that receives described UE transmission is mapped as the 2nd IP address by described network equipment, the object IP address of the described downlink data packet receiving is mapped as to a described IP address, and described the 2nd IP address is the IP address that described the second access network is corresponding;

The described module of setting up, also for setting up at described UE the second access network corresponding by described the second access network type between far-end UE in audio call, set up the second medium surface flow link corresponding to described the 2nd IP address, wherein, described the second medium surface flow link is the medium surface flow link between described network equipment and described UE under described the second access network.

10. according to the processing unit of the speech business described in claim 9, it is characterized in that, describedly also comprise: remove module;

Described dismounting module, for removing described the second medium surface flow link.