CN101800819A - Method for transmitting fixed network business and gateway - Google Patents

Abstract

The embodiment of the present invention provides a fixed network service transmission method and a gateway, the method includes: establishing a transparent transmission channel between the caller and the called party that needs to communicate with the fixed network service on the bearer network; The signal is converted into a digital signal; and the digital signal is transparently transmitted to the called party through the transparent transmission channel. The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that operators only need to make a little modification to the gateway to support the transmission of various fixed network services, reducing operating costs.

Description

Transmission method and gateway of fixed network service

technical field

The present invention relates to the communication field, in particular to a transmission method and device for fixed network services.

Background technique

With the rapid development of network technology, various services previously based on fixed networks, such as the Public Switched Telephone Network (PSTN), can have more bearer options, such as mobile networks of various standards, IP network etc.

The various services based on the fixed network generally require stability and real-time guarantees, such as fax services, tele-assistance services (Tele-Assistance), telephone automatic alarm services (Tele-Alarm) or services based on fixed-line telephone lines. Point of sale terminal (point of sale, POS) machine, etc. However, how to re-use various devices based on the above-mentioned fixed network service in the above-mentioned mobile network or IP network is a difficult problem in the prior art.

In the prior art, there is a facsimile solution based on the Circuit Switched (CS) domain, such as the facsimile protocol of Universal Mobile Telecommunications System (UMTS) 23.146, which completes the T.30 fixed network facsimile protocol-T. 38IP fax protocol-transformation of T.30 fixed network fax protocol, so that the fax service can be transmitted on the IP network.

However, the above existing technologies have the following defects: since the network elements on the entire link need to be adapted to various protocols, operators need to upgrade the existing network elements, thereby increasing the operating cost; in addition, for different Fixed network services require network elements to make different control adaptations, so they cannot be compatible with all fixed network services.

Contents of the invention

Embodiments of the present invention provide a fixed network service transmission method and device, which are used to enable various fixed network services to be transmitted in a non-fixed network by slightly adjusting the existing network.

On the one hand, the embodiment of the present invention proposes a fixed network service transmission method, which includes: establishing a high-priority transparent transmission channel between the calling party and the called party who need to communicate with the fixed network service; The signal is converted into a digital signal; and the digital signal is transparently transmitted to the called party through the high-priority transparent transmission channel.

On the other hand, the embodiment of the present invention also proposes a gateway, which includes: a channel establishment unit, configured to establish a high-priority transparent transmission channel between the caller and the called party that needs to communicate with fixed network services; an analog-to-digital conversion unit, It is used to convert the analog signal on the calling telephone line into a digital signal; the sending unit is used to transparently transmit the digital signal to the called party through the high-priority transparent transmission channel.

The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that operators only need to make a little modification to the gateway to support the transmission of various fixed network services, reducing operating costs.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

FIG. 1 is a schematic flow diagram of a transmission method for a fixed network service provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of another transmission method for fixed network services provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a gateway provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a channel establishment unit provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a fixed network service transmission system 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.

As shown in Figure 1, it is a schematic flowchart of a transmission method for a fixed network service provided by an embodiment of the present invention. The embodiment of the present invention is described from the side of the calling terminal performing the fixed network service, specifically, from the connection with Described by a device connected to the calling terminal that supports the transmission of the fixed network service, the method includes the following steps:

S101: Establish a transparent transmission channel on the bearer network between the caller and the called party that needs to communicate with fixed network services; the establishment of the transparent transmission channel is used to transmit fixed network service data, and the transparency of the transmission channel on the bearer network can be The operator of the bearer network can transmit fixed network services without making too many changes to its network elements.

As an embodiment of the present invention, the bearer network in this step may include a mobile network, an IP network, an infrared network, or a Bluetooth network.

Various services in the above-mentioned bearer network can have different priority levels according to different types, and the priority levels can be divided into: session level, mainly used for transmitting voice, video telephony, etc.; stream level, mainly used for Transmission of audio streams, video streams, etc.; interactive level, mainly used to transmit web browsing data; background level, mainly used for email, file transfer protocol (File Transfer Protocol, FTP) downloads, etc.

As an embodiment of the present invention, the transparent transmission channel in this step can be a session-level transparent transmission channel, such as circuit switching (Circuit Switched, CS) that can include Universal Mobile Telecommunications System (Universal Mobile Telecommunications-munications System, UMTS) Data channels, Circuit Switch Data (CSD) channels of Code Division Multiple Access CDMA, and High Speed Circuit Switched Data (HSCSD) channels of Global System for Mobile Communications (GSM) Or a packet switched (Packet Switched, PS) data channel of the Long Term Evolution LTE, etc.

The high priority of the transparent transmission channel can ensure the stability and reliability of fixed network service transmission.

S102: converting the analog signal on the calling telephone line into a digital signal;

The analog signal in this step is the data signal of the fixed network service, after converting the analog signal into a digital signal, transmitting on the bearer network can expand the transmission bandwidth of the trunk line, and the specific realization of this step can be implemented by an analog/digital converter be realized.

S103: Transparently transmit the digital signal to the called party through the transparent transmission channel. At the called party, a device supporting the transmission of the fixed network service is also connected to the called terminal, so as to receive the digital signal, convert the digital signal into an analog signal through analog/digital conversion, and enter the telephone line of the called terminal.

The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that the operator only needs to make a little change to the gateway so that the gateway can support the establishment of a transparent transmission channel, and can support various fixed network services. Network business transmission, thereby reducing operating costs.

In an embodiment of the present invention, the step S101 may include: establishing a 64K circuit-switched CS data channel on the UMTS network between the calling party and the called party who need to communicate with fixed-line services, specifically, it may include: Step S201 and Step S202 shown:

S201: Send a setup (setup) message requesting to establish a 64K CS data channel to the called terminal;

S202: If the called terminal supports fixed network service communication, establish a 64K CS data channel according to the CS call flow specified by 3GPP;

In this embodiment, the above-mentioned setup message may include the data type of the data to be transmitted in the 64K CS data channel, and the data type may be represented by a name or a number, as long as the calling and called devices agree through negotiation, such as In an end-to-end field of the setup message, FAX or VOICE is used to indicate that the data to be transmitted by the channel is fax data or voice data.

In this embodiment, the 64K CS data channel is established to transmit subsequent digital signals of G.711. G.711 is a standard of pulse code modulation with a sampling rate of 8k per second and uses a 64Kbps uncompressed Channel to transmit signals, so the type of the CS data channel should match the scheme of the subsequent pulse code modulation.

In this embodiment, the CS call flow in step S202 can be realized by existing technologies, and will not be repeated here. It should be pointed out that if the called terminal is a mobile terminal, various signaling in the CS call flow The called terminal can be reached directly through the UMTS network, and if the called terminal is a fixed network terminal, the above-mentioned various signaling needs to pass through an interworking function (Inter-working Function, IWF) unit, and the above-mentioned various signaling is processed by the IWF unit Analysis is performed to support the conversion of signaling between the UMTS network and the fixed network terminal.

Correspondingly, the above steps S102 and S103 may respectively include steps S203 and S204 as shown in FIG. 2:

S203: converting the analog signal on the calling telephone line into a digital signal conforming to the G.711 standard;

In this step, the analog signal on the calling telephone line is the data signal of the above-mentioned fixed network service. After the analog signal is converted into a digital signal, transmission on the bearer network can expand the transmission bandwidth of the trunk line, and the specific realization of this step can be performed by An analog-to-digital converter is implemented.

S204: Transparently transmit the digital signal to the called party through the 64K CS data channel;

Specifically, the digital signal can be sent to the Node B (base station) in the form of a radio bearer, and then enter the UMTS network through the Radio Network Controller (RNC), and then reach the called party through the UMTS network.

The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that the operator only needs to make a little change to the gateway so that the gateway can support the establishment of a transparent transmission channel, and can support various fixed network services. Network business transmission, thereby reducing operating costs. In addition, the high priority of the transparent transmission channel can also ensure the stability and reliability of fixed network service transmission.

As shown in Figure 3, it is a schematic structural diagram of a gateway provided by an embodiment of the present invention, the gateway includes: a channel establishment unit 310, an analog-to-digital conversion unit 320, and a sending unit 330, wherein the channel establishment unit 310 and the analog-to-digital conversion unit 320 and the sending unit 330 are connected.

The channel establishment unit 310 is used to establish a transparent transmission channel between the calling party and the called party that needs to communicate with fixed network services on the bearer network. In this embodiment, the aforementioned bearer network may include a mobile network, an IP network, an infrared network, or a Bluetooth network, and the like. The above-mentioned transparent transmission channel may be a session-level transparent transmission channel, such as a CSD channel of CDMA, an HSCSD channel of GSM, or a PS data channel of LTE. The specific process of establishing the above-mentioned transmission channel can be realized through existing technologies.

The analog-to-digital conversion unit 320 is used to convert the analog signal on the calling line into a digital signal. Here the analog signal on the calling telephone line is the data signal of the fixed network service. After the analog signal is converted into a digital signal and transmitted on the bearer network, the transmission bandwidth of the trunk line can be enlarged, and the specific realization of this step can be performed by a module/ The digital converter is realized.

The sending unit 330 is configured to transparently transmit the digital signal to the called party through the transparent transmission channel. Specifically, the digital signal can be sent to a radio network controller (Radio Network Controller, RNC) in the form of a radio bearer so as to enter the UMTS network, and reach the called party through the UMTS network. At the called party, a device supporting the transmission of the fixed network service is also connected to the called terminal, so as to receive the digital signal, convert the digital signal into an analog signal through analog/digital conversion, and enter the telephone line of the called terminal.

The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that the operator only needs to make a little change to the gateway so that the gateway can support the establishment of a transparent transmission channel, and can support various fixed network services. Network business transmission, thereby reducing operating costs.

In an embodiment of the present invention, the above-mentioned channel establishment unit 310 may be used to establish a 64K circuit-switched CS data channel between the calling party and the called party who need to communicate with fixed network services using UMTS as the bearer network. In order to realize the above functions, as shown in FIG. 4, the channel establishment unit 310 may specifically include:

The setup request sending module 311 is configured to send a setup message requesting to set up a 64K CS data channel to the called terminal, the setup message includes the data type of the data to be transmitted in the 64K CS data channel, and the data type can be Indicated by name or number, as long as there is a consensus between the called devices, for example, in an end-to-end field of the setup message, FAX or VOICE is used to indicate that the data to be transmitted by the channel is fax data or voice data.

A CS channel establishment module 312, configured to establish a 64K CS data channel according to the CS call flow specified by 3GPP when the called terminal supports fixed network service communication.

In this embodiment, the 64K CS data channel is established to transmit subsequent digital signals of G.711. G.711 is a standard of pulse code modulation with a sampling rate of 8k per second and uses a 64Kbps uncompressed Channel to transmit signals, so the type of the CS data channel should match the scheme of the subsequent pulse code modulation.

In this embodiment, the CS call flow involved in the process of establishing the CS data channel by the CS channel establishment module 312 can be realized by existing technologies, and will not be described in detail here. It should be pointed out that if the called terminal is a mobile terminal , the various signaling in the CS call flow can reach the called terminal directly through the UMTS network, and if the called terminal is a fixed network terminal, the above-mentioned various signaling needs to pass through the interworking function unit, and the IWF unit performs the above-mentioned various The signaling is analyzed to support the conversion of signaling between the UMTS network and the fixed network terminal.

Correspondingly, the above-mentioned analog-to-digital conversion unit 320 is used to convert the analog signal on the calling telephone line into a digital signal conforming to the G.711 standard. Here, the analog signal on the calling telephone line is the data signal of the above-mentioned fixed network service, and the transmission bandwidth of the trunk line can be expanded after the analog signal is converted into a digital signal and transmitted on the bearer network.

The sending unit 330 is configured to transparently transmit the above-mentioned digital signal conforming to the G.711 standard to the called party through the 64K CS data channel. Specifically, the digital signal can be sent to a radio network controller (Radio Network Controller, RNC) in the form of a radio bearer so as to enter the UMTS network, and reach the called party through the UMTS network.

The embodiment of the present invention transmits fixed network services by establishing a dedicated transparent transmission channel on the bearer network, so that the operator only needs to make a little change to the gateway so that the gateway can support the establishment of a transparent transmission channel, and can support various fixed network services. Network business transmission, thereby reducing operating costs. In addition, the high priority of the transparent transmission channel can also ensure the stability and reliability of fixed network service transmission.

As shown in Figure 5, it is a schematic structural diagram of a fixed network service transmission system provided by the embodiment of the present invention. The fixed network service transmission is described in detail below in conjunction with this figure:

In this embodiment, it is assumed that the voice terminal 530 and the fax terminal 540 are the calling party, and the voice terminal 550, the fax terminal 560 and the mobile terminal 570 are the called party, and the calling party and the called party need to pass the UMTS network transmission Fixed line business.

Voice terminal 530 and facsimile terminal 540 are connected with gateway 510 respectively, for example, can be connected with the RJ11 mouth of gateway 510 by telephone line, gateway 510 comprises analog-to-digital conversion unit 511, channel establishment unit 512 and UMTS transceiver unit 513, analog-to-digital conversion The unit 511 is connected to the telephone line of the voice terminal 530 and the fax terminal 540 on the one hand, for example, connected to the telephone line through the RJ11 port, and on the other hand is connected to the channel establishment unit 512, and the UMTS transceiver unit 513 is connected to the channel establishment unit 512.

The called party's voice terminal 550 and fax terminal 560 are respectively connected to the gateway 520. The gateway 520 includes an analog-to-digital conversion unit 521, a channel establishment unit 522, and a UMTS transceiver unit 523. The analog-to-digital conversion unit 521 is connected to the voice terminal 550 and the fax terminal 560 on the one hand. On the other hand, it is connected to the channel establishment unit 522, and the UMTS transceiver unit 523 is connected to the channel establishment unit 522.

Before transmitting the fixed network service, the gateway 510 will use its channel establishment unit 522 to establish a 64K CS data channel between the caller and the called party that needs to communicate with the fixed network service. The data type of the data to be transmitted in the established setup message. The data type can be represented by name or number, as long as there is a consensus between the called devices. For example, in an end-to-end field of the setup message, FAX or VOICE to indicate that the data to be transmitted by this channel is fax data or voice data. Then the setup message is sent to the UMTS network by the UMTS transceiver unit 523, and arrives at the voice terminal 550, the facsimile terminal 560 or the mobile terminal 570 through the UMTS network, and if the above-mentioned called terminal supports the transmission of the fixed network service, the corresponding information is returned, A 64K CS data channel is established through a series of signaling interactions. It should be pointed out that if the called party is the mobile terminal 570, the above signaling can directly reach the mobile terminal 570 through the UMTS network; if the called party is the voice terminal 550 or the fax terminal 560, the UMTS network and the voice terminal 550 or the fax terminal 560 An IWF unit is needed to support the conversion of signaling.

The voice terminal 530 and the fax terminal 540 send the fixed network service data that need to be transmitted, such as voice signals and fax signals, to the gateway 510 through the telephone line in the form of analog signals, and the analog-to-digital conversion unit 511 in the gateway 510 receives the above-mentioned analog signals. Pulse code modulation (pulse code modulation, PCM) converts it into G.711 or other encoded data, and then the encoded data passes through the 64K CS data channel established by the channel establishment unit 522, and is sent wirelessly by the UMTS transceiver unit 513 go out. On the receiving side, if the called party is a voice terminal 550 or a fax terminal 560, the above coded data is received by the gateway 520, and converted into an analog signal by the analog-to-digital conversion unit 521 and then reaches the voice terminal 550 or the fax terminal 560 through the telephone line; If the called party is a mobile terminal 570, the called party is directly reached through the UMTS network.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be realized by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium 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 specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (11)

1. A transmission method for fixed network services, characterized in that the method comprises: On the bearer network, a transparent transmission channel is established between the caller and the called party who need to communicate with fixed network services; Convert the analog signal on the calling line to a digital signal; Transparently transmit the digital signal to the called party through the transparent transmission channel. 2. The method according to claim 1, wherein said establishing a transparent transmission channel between the calling party and the called party that needs to carry out fixed network service communication on the bearer network comprises: On the UMTS network of the universal mobile communication system, a 64K circuit-switched CS data channel is established between the calling party and the called party who need to conduct fixed-line service communication. 3. The method according to claim 2, wherein the setting up of a 64K CS data channel between the calling party and the called party that needs to carry out fixed network service communication on the UMTS network specifically includes: Sending a setup message requesting to set up a 64K CS data channel to the called terminal, the setup message including the data type of the data to be transmitted in the 64K CS data channel; If the called terminal supports fixed network service communication, a 64K CS data channel is established according to the CS call flow specified by 3GPP. 4. The method according to claim 3, wherein, if the called terminal is a fixed network terminal, then setting up a 64K CS data channel between the calling party and the called party that needs to carry out fixed network service communication on the UMTS network is also include: Send a setup message requesting the establishment of a 64K CS data channel to the interworking function IWF unit, and then send it to the called terminal through the conversion of the IWF functional unit, and the setup message includes the data to be transmitted in the 64K CS data channel data type. 5. The method according to claim 1, wherein said converting the analog signal on the calling telephone line into a digital signal comprises: Convert the analog signal on the calling line into a digital signal that conforms to the G.711 standard. 6. The method according to claim 1, wherein the transparent transmission channel is a session-level transparent transmission channel, including a circuit-switched data service CSD channel of Code Division Multiple Access CDMA, a high-speed circuit of Global System for Mobile Communications GSM Switched data HSCSD channel or packet switched PS data channel of Long Term Evolution LTE. 7. The method according to claim 1, wherein the bearer network comprises a mobile network, an IP network, an infrared network or a Bluetooth network. 8. A gateway, characterized in that, comprising: The channel establishment unit is used to establish a transparent transmission channel between the caller and the called party that needs to communicate with fixed network services on the bearer network; An analog-to-digital conversion unit is used to convert the analog signal on the calling telephone line into a digital signal; A sending unit, configured to transparently transmit the digital signal to the called party through the transparent transmission channel. 9. The gateway of claim 8, wherein The channel establishment unit is specifically used to establish a 64K circuit-switched CS data channel between the calling party and the called party who need to communicate with fixed network services using UMTS as the bearer network. 10. The gateway according to claim 9, wherein the channel establishment unit comprises: Set up a request sending module, configured to send a setup message requesting to set up a 64K CS data channel to the called terminal, where the setup message includes the data type of the data to be transmitted in the 64K CS data channel; The CS channel establishment module is used to establish a 64K CS data channel according to the CS call flow stipulated by 3GPP when the called terminal supports fixed network service communication. 11. The gateway of claim 9, wherein The establishment request sending module is also used to send a setup message requesting to set up a 64K CS data channel to the interworking function IWF unit, and then send it to the called terminal through the conversion of the IWF function unit, and the setup message includes the The data type of the data to be transmitted in the 64K CS data channel.

Images