CN101583097B - Soft switch service communication method, device and system - Google Patents

Abstract

The invention belongs to the technical field of communication, and relates to a soft switch service communication method, a device and a system, wherein the soft switch service communication method comprises the following steps: a first indoor base station sends a request message for starting soft switch service to a second indoor base station to establish a transmission channel for soft switch service; and soft switch service communication is conducted between the first indoor base station and the second indoor base station in the transmission channel for soft switch service so as to realize the soft switch service communication covered by the indoor base stations and expand the application of the indoor base stations.

Description

Communication method, device and system for softswitch service

technical field

The present invention relates to the field of communication technology, in particular to a communication method, device and system for softswitch services.

Background technique

With the development of Internet services and the wide application of broadband access networks and wireless networks, users need high-speed, convenient and low-cost wireless devices to enjoy wireless data services. In order to make better use of existing network resources and protect the cost of network equipment operators, FEMTO-CELL (femtocellular base station) is introduced into the wireless access network. The equipment corresponding to FEMTO-CELL is called AP (Access Point, access point), or indoor base station.

In the prior art, the AP can be applied to UMTS (Universal Mobile Telecommunications System, Universal Mobile Telecommunications System). The AP is connected to the AG (Access Gate, Access Gateway) through the IP (Internet Protocol) network, and the AG is connected to the existing UMTS system to form a UMTS AP home coverage system. Compared with traditional base stations, UMTS AP reduces the impact of high-speed data services on mobile networks, enabling existing wireless networks to access more wireless high-speed data users.

However, AP-based applications are very lacking in the prior art.

It is worth noting that AP can also be applied to other communication systems, such as GSM (Global System for Mobile communications, Global System for Mobile Communications), CDMA2000 (Code Division Multiple Access, Code Division Multiple Access 2000) system, and LTE/SAE (Long TermEvolution, 3GPP long-term evolution plan/System Architecture Evolution system architecture evolution) and other systems. Similar problems exist in these systems as well.

Contents of the invention

Embodiments of the present invention provide a communication method, device and system for softswitch services, which can realize communication of softswitch services covered by indoor base stations.

Embodiments of the present invention are achieved through the following technical solutions:

An embodiment of the present invention provides a communication method for a softswitch service, the method comprising:

The first indoor base station sends a request message for starting the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service;

The first indoor base station and the second indoor base station communicate the softswitch service on the transmission path of the softswitch service.

Another embodiment of the present invention also provides a communication device for softswitch services, the device comprising:

The first module is configured to send a request message for starting a softswitch service to an indoor base station, and establish a transmission channel for the softswitch service;

The second module is configured to communicate the softswitch service on the established softswitch transmission channel.

Still another embodiment of the present invention is a communication system for softswitch services, including the communication device for softswitch services provided in the above embodiments.

It can be seen from the above technical solutions that the first indoor base station sends a request message to start the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service, and then the first indoor base station and the second indoor base station perform softswitch service on the transmission channel. Exchange business communications. Through the technical solution provided by the embodiment of the present invention, the communication of the softswitch service under the coverage of the indoor base station is realized, and the application of the home base station AP is expanded.

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 flowchart of a communication method for a softswitch service provided by Embodiment 1 of the present invention;

FIG. 2 is a flow chart of a communication method for a softswitch service provided in Embodiment 2 of the present invention;

FIG. 3 is a flowchart of a communication method for a softswitch service provided by Embodiment 3 of the present invention;

FIG. 4 is a schematic diagram of a communication device for a softswitch service provided by Embodiment 4 of the present invention;

FIG. 5 is a schematic diagram of a communication device for a softswitch service provided by Embodiment 5 of the present invention;

FIG. 6 is a schematic diagram of a communication device for a softswitch service provided by Embodiment 6 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 drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. 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. In order to make it easier for those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is briefly described first.

It is worth noting that the technical solutions provided by the embodiments of the present invention are applicable to all wireless access systems, including but not limited to UMTS, CDMA, GSM, TD-SCDMA (Time Division-Synchronization Code Division Multiple Access, Time Division Synchronization Code Division Multiple Access) access), WiMAX (Worldwide interoperability for Microwave Access) and other wireless networks are also applicable to various wireless access systems after evolution, such as HSPA (High Speed Packet Access, high-speed packet access) The next evolution version HSPA+ and LTE (Long Term Evolution, Long Term Evolution) network, etc.

Among them, the concepts involved are explained as follows:

Softswitch: Its basic meaning is to separate the call control function from the media gateway (transport layer), and realize the basic call control function through software, including call routing, management control, connection control (establishment/deletion session) and signaling interworking , so as to realize the separation of call transmission and call control, and establish separate planes for control, switching and software programmable functions. Softswitch mainly provides functions such as connection control, translation and routing, gateway management, call control, bandwidth management, signaling, security and call detail records. At the same time, softswitch also encapsulates network resources and network capabilities, and connects with the service application layer through standard open service interfaces, so that new services can be quickly provided on the network conveniently. In order to realize multimedia services, softswitch technology introduces A multimedia service solution based on IMS (IP multimedia subsystem, IP multimedia subsystem).

IMS: It is a standardized next-generation network architecture. IMS uses VoIP (Voice over Internet Protocol, Internet telephony) applications based on 3GPP standardized SIP (Session Initiation Protocol, Session Initiation Protocol) applications, carried on standard IP protocols, and through SIP-based The interaction between the ISC (Internal Service Control, internal service control) interface and various application servers realizes various applications. Because IMS combines voice and data services, and combines the flexibility of IP network and the scalability of SIP, it is possible for telecom operators to provide mobile and fixed multimedia services.

SIP: is an application layer control protocol that can establish, modify and terminate multimedia sessions (conferences), such as Internet phone calls.

AP service gateway (ASG) server: save the SIP registration name of each AP, and the MSISDN, IMSI of the mobile terminal that each AP allows to reside in the Close working mode, and the mark of whether the mobile terminal resides on the AP, etc.; ASG server The call record is also saved, and the recorded content includes the calling number, the called number, and information such as whether the calling party allows video communication and the called party allows video communication.

In addition, in the technical solution provided by the embodiment of the present invention, in order to realize the softswitch service, the AP functions as a SIP UA (UserAgent, User Agent) and integrates the functions of the SIP client. For example, after each AP is powered on and starts, after obtaining the IP address, it immediately initiates SIP registration, and saves the registration name to the ASG server through TCP/IP communication.

The embodiments of the present invention are described in detail below.

Referring to Fig. 1, it is a flow chart of the communication method of the softswitch service provided by Embodiment 1 of the present invention, and the method includes:

S100: The first indoor base station sends a request message for starting a softswitch service to the second indoor base station.

Wherein, the first indoor base station and the second indoor base station may be connected through an IMS core network.

S101: Establish a softswitch service transmission channel between the first indoor base station and the second indoor base station.

For example, the transmission channel of the softswitch service is a UDP (User Datagram Protocol, User Datagram Protocol) channel. Before the UDP channel transmits data, no connection is established between the first indoor base station and the second indoor base station, so there is no need to maintain the connection state.

Wherein, the softswitch service is SIP voice communication or SIP video communication.

If the softswitch service is the initial session protocol SIP video communication, after receiving the message of starting SIP video communication sent by the ASG server, the first indoor base station sends a SIP video communication request message to the second indoor base station. After the first SIP response message, establish a transmission channel for SIP video communication with the second indoor base station;

If the softswitch service is an initial session protocol SIP voice communication, the first indoor base station receives the call setup request sent by the first terminal under its coverage to the second terminal under the coverage of the second indoor base station, and obtains the first call setup request from the call setup request. Terminal number and second terminal number; If the first indoor base station judges that the second terminal number is the SIP registration number of the second indoor base station, the call establishment request received is converted into a SIP voice communication request and sent to the second indoor base station; receiving After receiving the second SIP response message sent by the second indoor base station, a transmission channel for SIP voice communication with the second indoor base station is established.

S102: The first indoor base station communicates with the second indoor base station on the softswitch service on the transmission channel of the softswitch service.

In this embodiment, the first indoor base station establishes a softswitch service transmission channel with the second indoor base station, and performs software switching service communication with the second indoor base station through the softswitch service transmission channel. The indoor base station can carry out the softswitch business communication, which expands the application of the home base station.

Referring to Fig. 2, it is a flow chart of the communication method of the softswitch service provided by Embodiment 2 of the present invention, and the method includes:

S200: The first terminal establishes a voice call with the second terminal.

For example, the first terminal makes a call to the second terminal through the AP to which it belongs, and the AP to which the first terminal belongs monitors the call setup message of the call control message in the uplink direct transmission message, and transparently transmits the monitored call setup message to the core network, After the call is established successfully, the AP to which the first terminal belongs or the AP to which the second terminal belongs notifies the ASG server to create a corresponding call record, and the content of the call record can store the number of the first terminal and the number of the second terminal.

S201: The first terminal sends a trigger message requesting SIP video communication to the first AP to which it belongs;

In this step, the trigger message can be a START DTMF (Dual-Tone Multi frequency, Dual-Tone Multi-Frequency) message. Specifically, after the voice call between the first terminal and the second terminal is successfully established, the first terminal and the second terminal can negotiate to implement a video call through the AP during the voice communication process. For example, the first terminal can trigger the keyboard A preset button on the AP requests video communication from the first AP.

S202: When the first AP receives a trigger message requesting SIP video communication sent by the first terminal, it notifies the ASG server to record in the call record that the first terminal allows video communication;

Specifically, the trigger message for starting SIP video communication sent by the first terminal may include preset information allowing video communication. After receiving the trigger message, the first AP sends a message to the ASG server recording that the first terminal allows video communication. Yes, the ASG server records that the first terminal allows video communication.

During specific implementation, the information allowing video communication in the trigger message can be preset, for example, the IA5 character code of a certain key.

S203: The ASG server sends a message of starting SIP video communication to the first AP.

For example, when the ASG server queries the second terminal to allow video communication according to the locally stored records, it notifies the first AP to start SIP video communication according to the stored first terminal number. The content of the message includes: the SIP registration number of the first AP and the second Information such as the SIP registration number of the AP.

S204: After receiving the message of starting the SIP video communication sent by the ASG server, the first AP sends a SIP video communication request message to the second AP.

For example, after the first AP receives the message of starting SIP video communication sent by the ASG server, the first AP constructs a message requesting a SIP video call (SIP INVITE), and sends the constructed message requesting a video call to the second AP; The message receiver (TO field) of the request video call contains the SIP registration number of the peer AP (the second AP), and the initiator (FROM field) contains the SIP registration number of itself (the first AP), and the SIP INVITE can also It further carries Session Description Protocol (SDP) information, and the SDP information may include the media format, encoding type, media stream port, public network IP address of the AP, etc. for video communication.

S205: The second AP sends a first SIP response message to the first AP.

For example, after receiving the SIP INVITE message, the second AP constructs the first AIP response message, such as SIP 200OK. In the SIP 200OK message, the FROM field contains the SIP registration number of itself (the second AP), and the TO field contains the SIP registration number of the opposite end (the first AP), and can further carry Session Description Protocol (SDP) information at the same time. The information may also include the media format, encoding type, media stream port, public IP address of the AP, etc. for video communication.

S206: The first AP sends a response confirmation message to the second AP.

For example, after the first AP receives the SIP 200OK response of the second AP, it sends a response confirmation message (SIP ACK) to the first AP.

S207: Establish a UDP channel between the first AP and the second AP.

Specifically, the first AP and the second AP obtain the IP address and media stream port of the opposite end according to the Session Description Protocol (SDP) information, and establish a UDP channel for SIP video communication.

S208: The first AP and the second AP transmit the SIP video media stream on the UDP channel;

Specifically, the first AP may send the received SIP video media stream to the display device covered by the first AP, and the second AP may send the received SIP video media stream to the display device covered by the first AP.

In the technical solution of this embodiment, based on the networking mode of the femtocell base station, electronic consumer products such as a family's television, desktop computer, notebook computer, fixed phone, and mobile terminal can be connected to the AP through an ADSL modem. The AP has a wireless access device with home gateway and MSC functions, thus forming a private network inside the home. When the video communication between the first AP and the second AP is established successfully, the video signal of the opposite end can be displayed in real time on the mobile terminal, TV or computer.

Specifically, the images taken by the cameras at both ends of the communication (such as the cameras on the first terminal and the second terminal) are sent to the opposite end in the form of RTP stream after video encoding; and after the opposite end AP monitors the video media stream, It is decoded and sent to display devices such as videophones, indoor televisions, and computers.

The above description is from the perspective of the first terminal actively initiating SIP video communication. If the second terminal actively initiates SIP video communication, the corresponding steps are:

The second terminal sends a trigger message requesting SIP video communication to the second AP to which it belongs; when the second AP receives the trigger message requesting SIP video communication, it notifies the ASG server to record in the call record that the second terminal allows video communication; the ASG When the server queries the first terminal to allow video communication according to the records saved locally, it sends a message to start SIP video communication to the second AP; after receiving the message to start SIP video communication sent by the ASG server, the second AP sends SIP video to the first AP. Communication request message; the first AP sends a SIP response message to the second AP; the second AP sends a response confirmation message to the first AP; a UDP channel is established between the first AP and the second AP; SIP video media streams are transmitted on the channel.

Since the steps are similar to the aforementioned steps, the detailed steps are not described in detail.

It can be understood that, during the SIP video communication between the first terminal and the second terminal, any party in the communication can interrupt the ongoing SIP video communication at any time by triggering a preset button. When the AP that belongs to the terminal that triggers the interruption of SIP video communication listens to the START DTMF message, if the message contains the pre-set IA5 character code of a key that stops SIP video communication, it will notify the ASG server to record the user's permission in the corresponding call record. Video communication, and trigger the AP of the terminal that interrupts the video communication to send a message of terminating SIP video communication (SIP BYE) to the other party, so as to achieve the purpose of terminating the SIP video communication. In addition, when the communication between the first terminal and the second terminal is completed, the first AP or the second AP sends a message to the ASG server to delete the call record.

In the technical solution provided by this embodiment, the AP integrates the functions of the SIP client, and the ASG server can cooperate to realize the SIP video communication process. When SIP video communication is required between the first terminal and the second terminal, the local AP sends a request message to start the softswitch service to the remote AP, and completes the SIP video communication through the signaling interaction between the terminal, AP, and ASG server Negotiate, establish a transmission channel for video communication, and perform SIP video communication on the transmission channel. In this way, the SIP video communication under the coverage of the AP is realized, and the application service of the AP is expanded.

Moreover, the embodiment of the present invention can adopt the video accompanying establishment technology to realize the SIP video communication while the ordinary voice service is performed, that is, the ordinary voice call can be dialed through the Femto Cell, and the accompanying video call can be established.

In addition, if the AP has a home gateway function, a family's TV, desktop computer, notebook computer, fixed phone, mobile terminal and other electronic consumer products are connected to the AP through an ADSL modem to form a private network inside the home. It becomes a cordless phone handle in a videophone, and displays images through a computer or TV connected to the AP during video communication, thereby improving user experience.

In addition, the technical solution provided by the embodiment of the present invention can also realize SIP voice communication under the coverage of the AP.

The solution includes: the first indoor base station receives a call establishment request sent from the first terminal under its coverage to the second terminal under the coverage of the second indoor base station, and obtains the first terminal number and the second terminal number from the call establishment request. When an indoor base station judges that the second terminal number is the SIP registration number of the second indoor base station, it converts the received call establishment request into a SIP voice communication request and sends it to the second indoor base station; the second indoor base station responds to the SIP voice communication request For example, after sending a second SIP response message, the first indoor base station establishes a transmission channel for SIP voice communication with the second indoor base station after receiving the second SIP response message, and communicates with the second SIP voice communication through the transmission channel for the SIP voice communication. SIP voice communication between indoor base stations.

Specifically, after the second indoor base station receives the SIP voice communication request, the second indoor base station initiates paging to the terminals under its coverage. If a certain terminal under the coverage of the second indoor base station responds to the paging of the second indoor base station And when off-hook, the second indoor base station sends a second SIP response message to the first indoor base station; after the first base station receives the second SIP response message sent by the second indoor base station, it sends an off-hook message to the first terminal, and the first The terminal responds to the off-hook message, and the first base station sends a SIP response message to the second indoor base station after receiving the off-hook response message sent by the first terminal, and a UDP channel is established between the first AP and the second AP, and through the UDP channel for SIP voice communication.

The realization of SIP voice communication is described below in the mode of specific embodiment:

Referring to Fig. 3, it is a flow chart of the communication method of the softswitch service provided by Embodiment 3 of the present invention, and the method includes:

S300: Establish a wireless bearer connection or a data bearer connection between the first terminal and the first AP.

S301: The first AP receives the call setup (call setup) request sent by the first terminal, and if the second terminal number is the SIP registration number of the second AP, converts the received call setup request into an initial session protocol request (SIP INVITE) .

For example, the first terminal resides on its own AP (the first AP) and calls the second terminal through the first AP, and the first AP monitors the call control message (Call Control, CC) in the uplink direct transmission message. Call setup (call setup) message, extract wherein as the first terminal number (callingparty number) of the calling terminal and the second terminal number (Called party number) as the called terminal and save.

If the 6 digits before the second terminal number are "111236" (representing the feature code of the SIP voice call, which can be set, the embodiment of the present invention is not limited thereto), and the actual second terminal number is the part after the feature code, then Determine whether the number behind the feature code is the SIP registration number of an AP (such as the second AP). If so, the first AP will no longer send this call setup to the core network, but will send this call setup to the core network. setup is converted to a SIP INVITE message. The TO field of the SIP INVITE message contains the SIP registration number of the second AP, and the FROM field contains the SIP registration number of the first AP.

It is understandable that the rules can also be set in advance to directly judge the second terminal number. If it is the SIP registration number of a certain AP, the call setup is converted into a SIP INVITE message.

S302: The first AP sends a SIP voice communication request (SIP INVITE) to the second AP.

S303: After receiving the SIP INVITE message, the second AP queries the ASG server for identifiers of all terminals residing under the second AP at this time.

In this step, the identifier of the terminal may be an International Mobile Equipment Identity (IMSI).

S304: The ASG server sends the IMSIs of all terminals residing under the second AP to the second AP. For example, the IMSIs of the second terminal and the third terminal are sent to the second AP.

It can be understood that the ASG server can also send a TMSI (Temporary Mobile Subscriber Identity, temporary mobile subscriber identity) to the AP at the same time.

S305: After receiving the IMSI sent by the ASG server, the second AP sends a paging request (such as: Paging type 1) to the terminal corresponding to the IMSI.

For example, paging is initiated to the second terminal and the third terminal respectively according to the IMSI of the second terminal and the IMSI of the third terminal.

S306: The second AP starts a timer T1.

S307: The second AP receives a paging response message sent by any terminal residing in the second indoor base station, and establishes a radio bearer connection with the responding terminal.

For example, the second AP receives the call response message of the second terminal, and the second AP and the second terminal complete the establishment of the radio bearer (RRC) connection, RAB Assignment and other processes, thereby establishing a connection between the second AP and the second terminal. wireless bearer connection.

It can be understood that if the timer T1 is overtime, and the second AP does not receive any paging response from any terminal, the AP sends a SIP 480 message to the first AP, and if the first AP receives the SIP 480 message, it releases the communication The radio bearer connection and related resources established between the first terminals.

S308: The second AP stops timing of the timer T1.

S309: The second AP sends a paging response (SIP 100 Trying) message to the first AP.

S310: After receiving the SIP 100 Trying, the first AP sends a call confirmed (call confirmed) message to the first terminal.

S311: The second AP receives the ringing message of the terminal that responds to the paging.

S312: The second AP sends a response message (SIP 180Ringing) to the first AP, and starts a timer T2.

S313: The first AP receives the SIP 180 Ringing, and sends a ringing message (Alert) to the first terminal.

S314: If the second AP receives an off-hook message (connect) from the second terminal within the time specified by the timer T2, the second AP releases the RRC connections of other terminals that have responded to the paging.

S315: The second AP sends an acknowledgment response message (SIP 200OK) to the first AP.

S316: After receiving the SIP 200 OK, the first AP sends an off-hook message to the first terminal.

The off-hook message may be a connect message.

S317: The first terminal responds to the off-hook message, and sends an off-hook response message (Connect Ack) to the first AP.

S318: After receiving the message, the first AP sends a SIP response message (SIP Ack) to the second AP.

S319: After receiving the SIP Ack, the second AP sends a Connect Ack message to the off-hook second terminal.

S320: Establish a UDP channel between the first AP and the second AP.

S321: The first AP and the second AP station transmit the SIP voice media stream on the UDP channel, and forward the received SIP voice media stream to the first terminal.

Specifically, the first indoor base station receives the SIP voice media stream sent by the second indoor base station through the UDP channel, and sends the SIP voice media stream to the first terminal through the wireless bearer connection with the first terminal.

It can be understood that the second indoor base station receives the SIP voice media stream sent by the first indoor base station through the UDP channel, and sends the SIP voice media stream to the second terminal through the wireless bearer connection with the second terminal.

During the passing process, when one of the two parties to the call hangs up, the release call message (Release) sent by the on-hook party reaches the AP to which it belongs, and the AP sends an end call message (SIP BYE) to the peer AP, and releases the message with the on-hook party. RRC connection; After receiving the SIP BYE, the peer AP sends a Release message to the other party in the call, and releases the RRC connection with the other party.

After step S321, the steps in Embodiment 1 or Embodiment 2 may also be included, so as to realize wireless video communication while performing wireless voice communication. The specific implementation process will not be repeated here.

Through this embodiment, the SIP voice communication under the coverage of the AP can be realized, and the application of the AP is expanded.

Specifically, a terminal under the first AP can call terminals of all members under another AP without knowing the numbers of these terminals.

It can be understood that, in the technical solution provided by the embodiments of the present invention, the AP can have part of the MSC function to complete functions such as call control, paging, and radio bearer establishment; Function.

Referring to FIG. 4 , it is a schematic diagram of a communication device for a softswitch service provided by Embodiment 4 of the present invention. The device includes: a first module 400 and a second module 401 .

The first module 400 is configured to send a request message for starting a softswitch service to an indoor base station, and establish a transmission channel for the softswitch service.

Wherein, the device and the indoor base station may be connected through an IMS core network.

The second module 401 is configured to communicate the softswitch service on the established softswitch transmission channel;

For example, the transmission channel of the softswitch service is a UDP (User Datagram Protocol, User Datagram Protocol) channel.

Wherein, the softswitch service is SIP voice communication or SIP video communication.

In this embodiment, the device may be an indoor base station, the indoor base station establishes a softswitch service transmission channel with another base station, and communicates with another indoor base station through the softswitch service transmission channel , so as to realize the softswitch service communication at the time of two indoor base stations, and expand the application of indoor base stations.

Referring to FIG. 5 , it is a schematic diagram of a communication device for a softswitch service provided by Embodiment 5 of the present invention. In this embodiment, the service based on the softswitch is an initial session protocol (SIP) video communication. Compared with Embodiment 4, in this embodiment, the first module 400 includes:

The first unit 500 is configured to send a SIP video communication request message to the indoor base station after receiving the message of starting SIP video communication sent by the ASG server of the AP service gateway, wherein the SIP video communication request message includes: the SIP registration number of the local end and the indoor The SIP registration number of the base station;

For example, after the first AP receives the message of starting SIP video communication sent by the ASG server, the first AP constructs a message requesting a SIP video call (SIP INVITE), and sends the constructed message requesting a video call to the second AP; The message receiver (TO field) of the request video call contains the SIP registration number of the peer AP (the second AP), and the initiator (FROM field) contains the SIP registration number of itself (the first AP), and the SIP INVITE can also It further carries Session Description Protocol (SDP) information, and the SDP information may include the media format, encoding type, media stream port, public network IP address of the AP, etc. for video communication.

The second unit 501 is configured to establish a transmission channel for SIP video communication with the indoor base station after receiving the first SIP response message sent by the indoor base station.

Specifically, the first AP and the second AP obtain the IP address and media stream port of the opposite end according to the Session Description Protocol (SDP) information, and establish a UDP channel for SIP video communication.

The second module 401 includes:

The third unit 502 is configured to transmit the SIP video media stream with the peer indoor base station (the second indoor base station) on the UDP channel, decode the received SIP video media stream and send it to the display device for display.

In addition, the softswitch service communication device in this embodiment also includes:

The notification unit 503 is configured to notify the ASG server to record the video communication allowed by the first terminal in the call record when receiving a trigger message requesting SIP video communication sent by the first terminal, and the ASG server queries the video communication allowed by the second terminal through the locally stored record. During communication, a message to start SIP video communication is sent to the first unit 500 .

The device provided in this embodiment integrates the functions of the SIP client, and the ASG server can cooperate with the implementation of the SIP video communication process. When SIP video communication is required between the first terminal and the second terminal, the first unit 500 sends a request message to start the softswitch service to the peer AP through the integrated MSC function, and through the signaling interaction between the terminal, AP, and ASG server , to complete the SIP video communication negotiation, the second unit 501 establishes a video communication transmission channel with the peer AP, and the third unit 502 performs SIP video communication with the peer AP on the transmission channel. In this way, the SIP video communication under the coverage of the AP is realized, and the application service of the AP is expanded.

Referring to FIG. 6 , it is a schematic diagram of a communication device for a softswitch service provided by Embodiment 6 of the present invention. In this embodiment, the softswitch service is SIP voice communication. Compared with Embodiment 4, in this embodiment, the first module 400 includes:

The fourth unit 600 is configured to receive a call establishment request sent by the first terminal to the second terminal under the coverage of the indoor base station, obtain the first terminal number and the second terminal number from the call establishment request; determine that the second terminal number is the When the SIP registration number of the indoor base station is used, the received call establishment request is converted into a SIP voice communication request and sent to the indoor base station;

For example, the fourth unit 601 monitors the call setup (call setup) message of the call control message (Call Control, CC) in the uplink direct transmission message, and extracts the first terminal number (calling party number) and As the second terminal number (Called partynumber) of the called terminal and save it.

If the 6 digits before the second terminal number are "111236" (representing the feature code of the SIP voice call, which can be set, the embodiment of the present invention is not limited thereto), and the actual second terminal number is the part after the feature code, then Determine whether the number behind the feature code is the SIP registration number of an AP (such as the second AP). If so, the first AP will no longer send this call setup to the core network, but will send this call setup to the core network. setup is converted to a SIP INVITE message. The TO field of the SIP INVITE message contains the SIP registration number of the second AP, and the FROM field contains the SIP registration number of the first AP.

It is understandable that the rules can also be set in advance to directly judge the second terminal number. If it is the SIP registration number of a certain AP, the call setup is converted into a SIP INVITE message.

The fifth unit 601 is configured to establish the transmission channel of the SIP voice communication with the indoor base station after receiving the second SIP response message sent by the indoor base station.

For example, the fifth unit 601 establishes a UDP transmission channel with the indoor base station.

Among them, the fifth unit 601 includes:

The first subunit 602 is configured to receive the second SIP response message sent by the indoor base station, the second SIP response message is when the terminal under the coverage of the second indoor base station responds to the paging of the second indoor base station and goes off-hook It is sent by the second indoor base station; wherein, the responding terminal may be any terminal under the coverage of the second base station.

The second subunit 603 is configured to send an off-hook message to the first terminal after receiving the second SIP response message sent by the indoor base station.

The third subunit 604 is configured to send a SIP response message to the second indoor base station after receiving the off-hook response message sent by the first terminal, and establish a transmission channel for SIP video communication with the second indoor base station.

Correspondingly, the second module 401 includes:

The sixth unit 605 is configured to transmit the SIP voice media stream with the indoor base station on the UDP channel, and forward the received SIP voice media stream to the first terminal.

Specifically, the SIP voice media stream sent by the indoor base station is received through the UDP channel, and the SIP voice media stream is sent to the first terminal through the wireless bearer connection with the first terminal.

The device provided in this embodiment integrates the functions of the SIP client and the MSC, and the ASG server can cooperate to realize the SIP communication process. When SIP voice communication is required between the first terminal and the second terminal, the fourth unit 600 sends a request message to start the softswitch service to the peer AP through the integrated MSC function, and through the signaling interaction between the terminal, AP, and ASG server , to complete the SIP voice communication negotiation, the fifth unit 601 establishes a transmission channel for video communication with the peer AP, and the sixth unit 605 performs SIP video communication with the peer AP on the transmission channel. In this way, the SIP video communication under the coverage of the AP is realized, and the application service of the AP is expanded.

In addition, an embodiment of the present invention also provides a softswitch service communication system, including any one or a combination of the devices described in Embodiment 4 to Embodiment 6.

It can be seen from the above embodiments that the embodiment of the present invention provides a home gateway function, which can connect fixed telephones, mobile phones, computers, televisions and other household equipment to form an indoor base station. When an indoor base station receives any A video communication request from a terminal transmits a video media stream with another indoor base station, and decodes the received video media stream and sends it to the display device under its coverage for display, thereby realizing wireless video communication based on an indoor base station, expanding In addition, any terminal residing under one indoor base station can also make a SIP call and call all terminals residing under another indoor base station. When any terminal responds to the call, the connection with the responding terminal Establish a wireless bearer connection between them, so as to perform voice communication with the responding terminal based on the indoor base station, thereby improving user experience.

Those skilled in the art can understand that all or part of the steps in the methods of the above embodiments can be implemented by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium.

The storage medium mentioned above may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The embodiments of the present invention have been described in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the method of the present invention and its core idea; meanwhile, For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (13)

1. a communication method of softswitch service, it is characterized in that, described method comprises: The first indoor base station sends a request message for starting the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service; The first indoor base station and the second indoor base station communicate the softswitch service on the transmission channel of the softswitch service; When the softswitch service is an initial session protocol SIP video communication, the first indoor base station sends a request message to start the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service, including: After the first indoor base station receives the message of starting SIP video communication sent by the AP service gateway ASG server, it sends a SIP video communication request message to the second indoor base station, wherein the SIP video communication request message includes: the first indoor base station's The SIP registration number and the SIP registration number of the second indoor base station, the first indoor base station establishes the SIP connection with the second indoor base station after receiving the first SIP response message sent by the second indoor base station Transmission channel for video communication. 2. The method according to claim 1, characterized in that the method further comprises: When the first indoor base station receives a trigger message requesting SIP video communication sent by the first terminal under its coverage, it notifies the ASG server to record in the call record that the first terminal allows video communication. 3. The method according to claim 1 or 2, characterized in that, the transmission channel of the softswitch service is a User Datagram Protocol (UDP) channel, The first indoor base station and the second indoor base station perform the communication of the softswitch service on the transmission channel of the softswitch service, including: The first indoor base station and the second indoor base station transmit the SIP video media stream on the UDP channel, and decode the received SIP video media stream and send it to a display device for display. 4. A communication method for a softswitch service, characterized in that, The first indoor base station sends a request message for starting the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service; The first indoor base station and the second indoor base station communicate the softswitch service on the transmission channel of the softswitch service; When the softswitch service is an initial session protocol SIP voice communication, the first indoor base station sends a request message to start the softswitch service to the second indoor base station, and establishes a transmission channel for the softswitch service, including: The first indoor base station receives a call establishment request sent from a first terminal under its coverage to a second terminal under the coverage of a second indoor base station, and obtains the first terminal number and the second terminal number from the call establishment request, so When the first indoor base station determines that the second terminal number is the SIP registration number of the second indoor base station, it converts the received call establishment request into a SIP voice communication request and sends it to the second indoor base station, and the first indoor base station receives the After receiving the second SIP response message sent by the second indoor base station, establish a transmission channel for the SIP voice communication with the second indoor base station. 5. The method of claim 4, wherein, The first indoor base station receives the second SIP response message sent by the second indoor base station, including: The first indoor base station receives the second SIP response message sent by the second indoor base station to the first indoor base station, the second SIP response message is when the terminal under the coverage of the second indoor base station responds to the paging of the second indoor base station and goes off-hook sent by the second indoor base station; The establishment of the transmission channel of the SIP voice communication with the second indoor base station includes: After receiving the second SIP response message sent by the second indoor base station, the first indoor base station sends an off-hook message to the first terminal; After receiving the off-hook response message sent by the first terminal, send a SIP response message to the second indoor base station, and establish the transmission channel of the SIP video communication with the second indoor base station. 6. according to the described method of claim 4 or 5, it is characterized in that, the transmission channel of described softswitch service is User Datagram Protocol UDP channel, The first indoor base station and the second indoor base station perform the communication of the softswitch service on the transmission channel of the softswitch service, including: The first indoor base station and the second indoor base station transmit the SIP voice media stream on the UDP channel, and forward the received SIP voice media stream to the first terminal. 7. A communication device for softswitch service, characterized in that said device comprises: The first module is configured to send a request message for starting a softswitch service to an indoor base station, and establish a transmission channel for the softswitch service; A second module, configured to communicate the softswitch service on the established transmission channel of the softswitch service; When the softswitch-based service is an initial session protocol SIP video communication, the first module includes: a first unit and a second unit; The first unit is configured to send a SIP video communication request message to the indoor base station after receiving the message of starting the SIP video communication sent by the AP service gateway ASG server, wherein the SIP video communication request message includes: the SIP registration number of the local end and the SIP registration number of the indoor base station; The second unit is configured to, after receiving the first SIP response message sent by the indoor base station, establish a transmission channel for the SIP video communication with the indoor base station. 8. The device according to claim 7, further comprising: The notification unit is configured to notify the ASG server to record in the call record that the first terminal allows video communication when receiving a trigger message requesting SIP video communication sent by the first terminal. 9. The device according to claim 7 or 8, wherein the transmission channel of the softswitch service is a User Datagram Protocol (UDP) channel, and the second module includes: The third unit is configured to transmit the SIP video media stream with the indoor base station on the UDP channel, decode the received SIP video media stream and send it to a display device for display. 10. A communication device for softswitch service, characterized in that said device comprises: The first module is configured to send a request message for starting a softswitch service to an indoor base station, and establish a transmission channel for the softswitch service; A second module, configured to communicate the softswitch service on the established transmission channel of the softswitch service; When the softswitch service is an initial session protocol SIP voice communication, the first module includes: a fourth unit and a fifth unit; The fourth unit is configured to receive a call establishment request sent by the first terminal to a second terminal under the coverage of the indoor base station, obtain the first terminal number and the second terminal number from the call establishment request; determine the second When the terminal number is the SIP registration number of the indoor base station, converting the received call establishment request into a SIP voice communication request, and sending it to the indoor base station; The fifth unit is configured to, after receiving the second SIP response message sent by the indoor base station, establish a transmission channel for the SIP voice communication with the indoor base station. 11. The device according to claim 10, wherein the fifth unit comprises: The first subunit is configured to receive a second SIP response message sent by the indoor base station, the second SIP response message is sent when a terminal under the coverage of the indoor base station responds to the paging of the indoor base station and goes off-hook The indoor base station sends; The second subunit is configured to send an off-hook message to the first terminal after receiving the second SIP response message sent by the indoor base station; The third subunit is configured to send a SIP response message to the indoor base station after receiving the off-hook response message sent by the first terminal, and establish a transmission channel for the SIP voice communication with the indoor base station. 12. The device according to claim 10 or 11, wherein the transmission channel of the softswitch service is a User Datagram Protocol (UDP) channel, and the second module includes: The sixth unit is configured to transmit the SIP voice media stream with the indoor base station on the UDP channel, and forward the received SIP voice media stream to the first terminal. 13. A communication system for softswitch services, characterized in that it comprises the device according to any one of claims 7 to 12.

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