CN101035179A - Device and method for realizing the G3 fax via the CDMA network - Google Patents
Device and method for realizing the G3 fax via the CDMA network Download PDFInfo
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- CN101035179A CN101035179A CN 200610057504 CN200610057504A CN101035179A CN 101035179 A CN101035179 A CN 101035179A CN 200610057504 CN200610057504 CN 200610057504 CN 200610057504 A CN200610057504 A CN 200610057504A CN 101035179 A CN101035179 A CN 101035179A
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Abstract
The invention provides a device and method for implementing G3 faxes through CDMA network. And the device comprises CDMA module, fax modem interface circuit, and user interface circuit, where when sending a fax, the user interface circuit receives analog fax data, the fax modem interface circuit converts the analog fax data into digital fax data, and the CDMA module converts the digital fax data into fax data of CDMA data link protocol format. And the invention uses common G3 electrograph to implement fax data transmission and receipt through the CDMA network, and breaks away from limitation of PSTN network.
Description
Technical field
The invention belongs to the device and method technical field of facsimile data transmission/reception, particularly a kind of common simulation G3 facsimile machine is by the device and method of cdma network transmitting facsimile data.
Background technology
Along with development of wireless communication devices and digital mobile cellular telecommunication net build perfect day by day, based on traditional wirephoto business of public switched telephone network (PSTN) gradually to radio facsimile business development based on digital mobile communication network, be widely used in numerous special occasions, as the place (train) of flowing, public place (railway station), odd-job occasion (construction site), mountain area and modern fixing office or mobile office place.The convenience of radio facsimile is that it is not subjected to the constraint of traditional telephone cable, and this is its a very big advantage, also is one of its reason of being developed rapidly.
Generally, in the G3 facsimile posting that the PSTN net is realized, a pair of facsimile machine of finishing facsimile function all contains modem, is responsible for finishing the mutual conversion of digital signal and analog signal; The realization of G3 facsimile protocol and the processing of view data are realized by " fax engine " (MCU embedded microprocessor) of G3 facsimile machine, be that the G3 facsimile machine is that analog signal sends the numerical data of representing paper document on the net at PSTN by the digital data conversion that will transmit, perhaps receive the numerical data of expression paper document by an opposite process
At present, a kind of PC facsimile art is arranged, realized the G3 facsimile transmission at the cdma cellular net, can be in CDMA mobile communication system, possesses the reliable facsimile service that the all-purpose computer network environment of access the Internet (Internet) realizes by use, but this scheme depends on computer network environment, can't realize the interface and the facsimile service of analog facsimile and cdma network.
In addition, also have some facsimile arts, for example be used for wireless local loop system and send/receive faxes device of data etc., but these device major parts all mainly are made of CPU and two modulator-demodulators, the structure relative complex, technology realizes difficulty, and cost is higher, for how guaranteeing in the very big cdma network of communication delay that the processing of the G3 facsimile protocol that high real-time requires does not propose a solution.These problems influence the reliability of G3 facsimile service realization in the cdma network and the compatibility of the different operators network equipment to a great extent.Therefore, provide a kind of new, simple relatively apparatus and method of structure, under wireless environment, realize the G3 fax, become problem demanding prompt solution in the industry.
Summary of the invention
Technical problem to be solved by this invention has been to provide a kind of apparatus and method that realize the G3 fax by cdma network, send/receive faxes data by cdma network, realize facsimile service with G3 facsimile machine or the facsimile equipment in other communication system in the PSTN net.
For solving the problems of the technologies described above, the invention provides a kind of apparatus and method by cdma network realization G3 fax, realize that by cdma network the device of G3 fax comprises CDMA module, fax modem interface circuit and user interface circuit, wherein:
The CDMA module links to each other with user interface circuit with the fax modem interface circuit, is used for the platform as transmission of wireless signals;
The fax modem interface circuit is connected with the CDMA module, is used to finish the analog facsimile signal of external G3 facsimile machine and the conversion between the CDMA module by signal, finish simultaneously according to facsimile protocol and the CDMA module between facsimile communication procedure;
User interface circuit is connected with external G3 facsimile machine with the CDMA module, be used to set up and fax modem between the analogue simulation data channel.
Described device may further include the telephone interface circuit, link to each other with the analog port of described user interface circuit respectively, be used to finish the transmission of analog signal between external G3 facsimile machine and the fax modem interface circuit with the fax modem interface circuit.
Described CDMA module can comprise:
The CDMA RF processing unit, the transmitting and receiving of modulation, CDMA data that is used to finish the CDMA data carried out Signal Pretreatment for the CDMA protocol processing unit simultaneously;
The CDMA protocol processing unit is used to finish the CDMA Channel protocol processes.
Described fax modem interface circuit can be connected with the Rm interface of CDMA module by the UART interface.
Described fax modem interface circuit according to facsimile protocol finish with the CDMA module between the facsimile protocol of communicating by letter can comprise: V.17, V.19, V.27 ter and V.21 channel 2, TIA/EIA-578 Class1 or T.31 Class1.0 facsimile protocol.
Described user interface circuit can be connected with external G3 facsimile machine by the Z interface.
The method that realizes the G3 fax may further comprise the steps:
(1) user interface circuit receives the analogue simulation data of the external G3 facsimile machine transmission that is attached thereto;
(2) the fax modem interface circuit is converted to the digital fax data with the analogue simulation data that external G3 facsimile machine sends;
(3) the CDMA module is converted to the facsimile data of CDMA SDL form with the digital fax data, and transmits by cdma network.
Described method may further include following steps:
The a.CDMA module receives the facsimile data of CDMA SDL form in the cdma network, and is converted into the digital fax data;
B. the fax modem interface circuit is converted to the analogue simulation data with the digital fax data;
C. user interface circuit sends to external G3 facsimile machine with the analogue simulation data.
Described method may further include: user interface circuit transmits the analog facsimile signal that external G3 facsimile machine sends by the telephone interface circuit that is attached thereto to the fax modem interface circuit.
Described step a can comprise: the CDMA RF processing unit of CDMA module receives the facsimile data of CDMA SDL form in the cdma network, and is converted into the digital fax data by the CDMA protocol processing unit.
Described digital fax data can be the HDLC frame data.
Described step (3) can comprise:
The CDMA protocol processing unit of CDMA module is converted to the facsimile data of CDMA SDL form with the digital fax data, and by the emission of CDMA RF processing unit, transmits by cdma network.
Described method can utilize data buffering and over-the-air protocol bag emulation technology to solve the G3 facsimile data transmission instability that CDMA circuit type data service time delay causes, and realizes that cdma network receives the administrative mechanism of buffering area.
Described step (1) user interface circuit can receive the analogue simulation data that external G3 facsimile machine sends by the Z interface.
The present invention realizes that by cdma network the apparatus and method of G3 fax can be widely used in wireless local loop terminal access device, use common G3 facsimile machine to realize the transmission/reception of facsimile data by cdma network, broken away from the limitation of PSTN net, the substituting PS TN wirephoto terminal traffic of netting fully in zone that radio CDMA network signal covers.Solved in public place, mobile office and the flowing carrier and the specific region that do not have telephone wire or PSTN net, traditional wirephoto machine can't use, and will realize the technical problem of fax sending and receiving, is effectively replenishing of mobile communication and wire communication.
Description of drawings
Fig. 1 is according to the described mode configuration schematic diagram of realizing the apparatus and method of G3 fax by cdma network of the embodiment of the invention;
Fig. 2 is according to the described functional structure chart of realizing the apparatus and method of G3 fax by cdma network of the embodiment of the invention;
Fig. 3 is according to the described forward link message processing flow figure that realizes the apparatus and method of G3 fax by cdma network of the embodiment of the invention;
Fig. 4 is according to the described reverse link information process chart of realizing the apparatus and method of G3 fax by cdma network of the embodiment of the invention;
Fig. 5 is according to described four typical process flow chart that realize the G3 facsimile protocol by software of the embodiment of the invention;
Embodiment
As shown in Figure 1, for according to the described mode configuration schematic diagram of realizing the apparatus and method of G3 fax by cdma network of the embodiment of the invention.Wherein, client computer equipment 101 and CDMA mobile device MT2 102 form transmitting branch according to the IS-707A.4 standard; BS/BSC (BaseStation/Base Station Controller, base station/base station controller) 103, MSC/IWF (MobileSwitching Center/Interworking Function, collaboration feature between mobile switching centre/net) 104, PSTN105, G3 facsimile machine 106, data modem unit 107, server computer equipment 108 are formed receiving branch according to the IS-707A.4 standard.
Common G3 facsimile service generally all is to realize in PSTN network (telephone wire), the a pair of facsimile machine of finishing facsimile function all contains modulator-demodulator (Modem), and the realization of facsimile protocol and the processing of view data are realized by the fax engine (MCU embedded microprocessor) of facsimile machine.
Among the present invention, IWF just is similar to a fax Modem, its control interface is moved on the Rm interface (RS-232 serial ports) that terminal equipment MT2 extends to user side, link to each other by air interface Um between them, for user (DTE equipment), it need not be concerned about to have carried out which type of communication process on the Um Interface on earth fully, and it can be operated the Rm interface and finish whole facsimile posting as common fax Modem (DCE) equipment of operation.
CDMA2000 has stipulated that the facsimile protocol on the Rm interface is the CLASS2.0 standard.At this moment this network of whole M T2 and BS/BSC and MSC/IWF composition can be interpreted as a fax Modem who supports the CLASS2.0 standard.
Here it is utilizes this device to realize the basic principle of PC fax, whole process need is connected PC on Rm (RS-232) interface and relevant fax software is realized, above-mentioned is the major function of knowing this device in order to analyze, promptly be the transmitting-receiving work of finishing fax by connection common G3 facsimile machine thereon, carry out facsimile service with facsimile machine in the PSTN net or the facsimile equipment in other network environments, that realizes mobile communication and wire communication effectively replenishes this designing requirement just of the present invention.
Embodiment of the invention device mainly is made of CDMA module, fax Modem interface circuit and user interface circuit, the CDMA module mainly comprises CDMA protocol processing unit and CDMA RF processing unit, and wherein the CDMA protocol processing unit comprises G3 facsimile protocol processing section.User interface circuit provides standard two line Z interfaces to be connected with common G3 facsimile machine, and four line caps of user interface circuit are connected with the speech processes port partly of CDMA protocol processing unit on the one hand, and four line caps with fax Modem interface circuit are connected simultaneously; Fax Modem interface circuit is connected with the UART port of CDMA protocol processing unit by its UART port.
Another structure and the connected mode of embodiment of the invention device are: add the telephone interface circuit part in said structure.User interface circuit provides standard two line Z interfaces to be connected with common G3 facsimile machine, links to each other with two line caps of telephone interface circuit simultaneously; The four-wire interface of user interface circuit is connected with the port of the speech processes part of CDMA protocol processing unit; Four line caps of telephone interface circuit are connected with four line caps of Modem interface circuit; Fax Modem interface circuit is connected with the UART port of CDMA protocol processing unit by its UART port.
Four line caps of user interface circuit can be single-ended simulation four line signals in the above-mentioned interface, it also can be Standard PC M digital port, the speech processes part of CDMA protocol processing unit is supported the connection of above-mentioned two kinds of ports simultaneously, four line caps of telephone interface circuit can be single-ended simulation four line signals, it also can be Standard PC M digital port, four line caps of the interface circuit of fax Modem can be single-ended simulation four line signals, also can be Standard PC M digital ports.
In said structure, the CDMA RF processing unit is responsible for finishing the modulation and demodulation that carries out the data message of protocol interaction between CDMA protocol processing unit and the cdma base station, by the information after these modulation of antenna transmission, perhaps demodulation is from the information of base station reception in the physical channel of network regulation.The CDMA protocol processing unit comprises the CDMA protocol stack, be responsible for finishing with cdma base station between all accord processing procedure of communicating by letter; The CDMA protocol processing unit comprises G3 facsimile protocol processing section, it cooperate with the fax Modem interface circuit of this device finish on the one hand and the G3 facsimile machine between the handling process in 4 stages of service call, the IWF by Um air interface control base station end finishes the handshaking procedure that carries out the G3 facsimile service with the facsimile equipment of other network on the other hand.Fax Modem interface circuit is finished the modulation and demodulation of exchanges data between G3 facsimile protocol processing section digital signal and the G3 facsimile machine analog signal.User interface circuit is finished two-four lines conversion of analog signal, and wherein four-wire interface can be single-ended simulation four line signals, also can be Standard PC M digital signal port.The telephone interface circuit of mentioning in the another kind of structure also is used for finishing two-four lines conversion of analog signal, and wherein four-wire interface can be single-ended simulation four line signals, also can be Standard PC M digital signal port.
The CDMA module is finished the functions such as detection, analog signal CODEC, interface control and switching of DTMF sign indicating number simultaneously.
As shown in Figure 2, for realizing the functional structure chart of the apparatus and method of G3 fax comprising CDMA RF processing unit 201, CDMA protocol processing unit 202, fax Modem interface circuit 203, user interface circuit 204, four line caps 205, G3 facsimile machine 106 by cdma network according to the embodiment of the invention is described.
Fax Modem interface circuit 203 is connected with CDMA protocol processing unit 202 by the UART port, be connected with four line caps 205 of user interface circuit 204 simultaneously, realize the modulation function of facsimile data, mainly finish the conversion between the digital fax signal of the analog facsimile signal of the external G3 facsimile machine of user interface circuit and CDMA protocol processing unit, this digital signal is AT order and HDLC frame structure, simultaneously according to V.17, V.19, V.27 ter and V.21 channel 2, TIA/EIA-578Class1 and T.31 facsimile protocol such as C1ass1.0 finish and the CDMA protocol processing unit between the handling process in 4 stages of service call.
CDMA protocol processing unit 202, Base-Band Processing part as the CDMA module, has the CDMA protocol stack, the main CDMA Channel protocol processes of being responsible for, except that normal audio call and communication process, the CDMA protocol processing unit also comprises G3 facsimile protocol processing section, it cooperate with the fax Modem interface circuit of this device finish on the one hand and the G3 facsimile machine between the handling process in 4 stages of service call, the IWF by Um air interface control base station end finishes the handshaking procedure that carries out the G3 facsimile service with the facsimile equipment of other network on the other hand.Owing to its master chip inside a powerful MCU flush bonding processor and digital signal processor QDSP are arranged on the other hand, so DTMF detection, analog signal CODEC and fax control can be realized by this baseband chip in house software all.Wherein G3 facsimile protocol processing section communicates by UART interface control fax Modem interface circuit and G3 facsimile machine, and result of communication is sent on the another one software interface Rm that operates in equally on the CDMA protocol processing unit operating system platform with AT order or HDLC frame form.These software tasks all are the mode operations simultaneously on real-time multi-task operating system (RTOS) with message communicating.
CDMA RF processing unit 201, Radio frequency Processing Unit, RF Processing Unit as the CDMA module, link to each other with CDMA protocol processing unit 202, the main rf modulations demodulation of being responsible for the CDMA data, finish transmitting and receiving of data by Um Interface, carrying out Signal Pretreatment for the CDMA protocol processing unit simultaneously, is a physical radio wireless transmission platform.
In the foregoing description, the CDMA module can be a kind of based on the CDMA module of the CDMA of QUALCOMM company hardware solution of ZTE Co., Ltd's independent research: MC210, MC220, MC222, MC232.The similar above-mentioned CDMA module of other companies also can be used as the CDMA module among the present invention.
As shown in Figure 3, for realizing may further comprise the steps the forward link message processing flow figure of the apparatus and method of G3 fax by cdma network according to the embodiment of the invention is described:
(step 301) receives the forward link radio-frequency signal;
(step 302) forward link radio-frequency signal becomes the forward link intermediate-freuqncy signal through down-converted;
(step 303) forward link intermediate-freuqncy signal is handled through down-conversion A/D, becomes the forward link digital signal;
(step 304) forward link digital signal is handled through digital baseband and is become the forward link information data;
(step 305) forward link information data is selected to become asynchronous and fax service data through forward direction information tap;
(step 306) is asynchronous to become fax service data with fax service data through the service condition setting;
(step 307) fax service data imports the G3 facsimile machine through modulation into by the Z interface.
As shown in Figure 4, for realizing may further comprise the steps the reverse link information process chart of the apparatus and method of G3 fax by cdma network according to the embodiment of the invention is described:
(step 401) G3 facsimile machine sends fax service data;
(step 402) fax service data is imported into by the Z interface through demodulation;
Setting becomes asynchronous and fax service data (step 403) fax service data through service condition;
(step 404) becomes asynchronous and fax service data selects to become the reverse link traffic data through multiple connection;
(step 405) reverse link traffic data are handled through digital baseband and are become the reverse link digital signal;
(step 406) reverse link digital signal is handled through up-conversion D/A and is become the reverse link intermediate-freuqncy signal;
(step 407) reverse link intermediate-freuqncy signal becomes the reverse link radio frequency signals emission through upconversion process.
Realization G3 facsimile function has been introduced a lot of new notions and link implementation method in cdma network, but for the facsimile equipment that is in network edge, these all need not be concerned about, use in the middle of their operation and the PSTN network is identical, also this can be interpreted as the clear transport protocol pattern.
As shown in Figure 5, for according to described four typical process flow chart that realize the G3 facsimile protocol by software of the embodiment of the invention.
The embodiment of the invention realizes the fax sending and receiving business by the G3 facsimile machine or the facsimile equipment in other network environments of cdma network and PSTN net, and that works together has four fax Modem:
1, the Modem of the external G3 facsimile machine inside of user interface circuit;
2, the fax Modem in the fax Modem interface circuit;
3, the digital fax Modem on the IWF;
4, be connected the Modem of the facsimile machine inside on the PSTN.
Wherein, 1 and 2 partner; 3 and 4 partner; Be to link together and HDLC frame by AT order and transparent transmission communicates between 2 and 3 by Um Interface.
Under other network environments, the fax Modem that has more " in pairs " exists, and the situation of 4 Modem of process and cdma network is similar, for the ease of analyzing, has only enumerated 4 here.
By four canonical processes of software realization G3 facsimile protocol, concrete steps are as follows:
Apparatus of the present invention (MT2) callers (transmission), the last G3 facsimile machine of PSTN called (reception);
The manual off-hook of calling terminal at first, MT2 send dialing tone;
If caller is an automatic mode, then send the CNG signal, this is optionally, manually can not send;
Manual dialup+Macintosh (fax indicates), order sends to MT2 through AT;
MT2 and BS/BSC carry out service negotiation;
Called facsimile machine shake bell;
IWF send called CNG signal;
Called fax is replied, and returns CED signal of IWF;
IWF sends CED Message to MT2; MT2 sends CED to the caller facsimile machine;
Fax is stage A--finish by call setup.
In this process, IWF and MT2 set up ppp link, transmit the DHLC frame, IPCP distributing IP address, TCP designated ends slogan.
Enter stage B--work before the message
Called tation transmits earlier the digital identification signal DIS of binary signal mode with the speed of 300bit/s (or 2400bit/s), and FIF facsimile information field (FIF) lining of the relevant performance of called tation (the control signal speed of using as suggestion, scanning line density, coded system, compatibility etc.) in the frame structure that transmits DIS is notified to the caller terminal;
After receiving the DIS signal, the caller terminal sends digital command signal DCS, order the other side receives, and in the information field of DCS contents such as scanning line density, document size, coded system is sent to the other side, notifies the other side to use the condition consistent with transmitter to decode to received signal and duplicate.Wherein the transmission rate of DCS will be with reference to the recommended value of the DIS that has received.Calling station sends DCS and has just determined that calling station sends message to called tation.
Process and message transmissions in the stage C--message
At stage C, at first switch modulator-demodulator, receiving-transmitting sides is according to former CCITT suggestion regulation T.4, adopt V.27ter modulator-demodulator or select for use V.29 that modulator-demodulator sends and receive message data, after message data sends end, transmitter sends continuously 6 row sign indicating number of ending and constitutes and go back to control signal RTC, and receiver receives to carry out behind the rtc signal and rotate back into control back rules that at this moment both sides enter stage D.
Stage D--process behind the message
After both sides enter stage D, receiver will be switched modulator-demodulator in the time at (75 ± 20) ms, receive EOM (ENMES signal) or the EOP (process end signal) that transmitter is sent with modulator-demodulator (or selecting V.27ter modulator-demodulator for use) V.21, MPS (multipage signal) signal, after receiver is received the signal of the preceding page or leaf of these expressions ENMES, beam back a post-message response signal according to the quality of reception to transmitter, as MCF (message acknowledge signal) or CRP (order repeating signal), RTN (receiving is negated to reach training signal again) etc., transmitter is retransmitted the message that sent just now according to these signal deciding, still continue to send the message of one page down, perhaps enter stage E.
Stage E--call out release
By artificial or realize automatically, with telephone line by fax pusher side guiding phone side.This stage sends a DCN (cut-out continue signal) signal by transmitter, and this signal does not need to respond.
Stage C, D, E are the substantial phase of fax, are HDLC frame transparent transmission mode.
In order to illustrate further above-mentioned purpose of the present invention, in whole facsimile posting, one of difficult point of fax is at sustained period, the stage of continuing finish after business datum by the Radio Link transparent transmission.Below the fax handshaking procedure is done with explanation.Caller G3 facsimile machine off-hook, the CDMA protocol processing unit by user interface circuit to G3 facsimile machine Sending dialled number sound, the G3 facsimile machine begins to dial called number (need add one group of combinations of numbers for facsimile service before called number indicates) after hearing dialing tone, software on the inner ARM of CDMA protocol processing unit detects called number DTMF, and send the AT order by the Rm interface called number and type of service are sent to CDMA protocol processing unit (all being finished in CDMA protocol processing unit inside by software), the CDMA protocol processing unit is carried out service negotiation according to the service request type by CDMA RF processing unit and base station IWF, sets up until service channel.
The embodiment of the invention realizes that by cdma network the course of work of G3 fax is as follows:
MT2 caller (transmission), IWF called (reception);
At first MT2 changes the fax pattern over to, and the AT order that the G3 facsimile protocol processing section of CDMA protocol processing unit is sent out a series of to be provided with to the Rm interface comprises AT+FCLASS=2.0 (2.0 command sets are set), AT+CRM=0 (the fax pattern is set) etc.
Next G3 facsimile protocol processing section receive number that facsimile machine will be called out and by the Rm interface make a call ATD * * * (number), the RM interface reply some link information+FCON (fax connect reply) ,+FCSI:5739300 (the called device identification of connection) ,+ FDIS 1,3,0,2,1,0,0,4 (remote authentication).
After OK is received in G3 facsimile protocol processing section, send AT+FDT (being ready for sending), Rm interface answer+ FDCS 1,3,0,2,1,0,0,4 (current sessions state) and CONNECT (connecting) to the Rm interface.At this moment G3 facsimile protocol processing section can send facsimile data to the Rm interface by the RM interface, but also will send a beginning flag DC2 (0x12) before, will send EOP sign DLE ETX (0x10 0x2C) after distributing the 1st page.
After receiving the affirmation OK of Rm interface, G3 facsimile protocol handling part distribution AT+FET=0 (the fax page or leaf does not finish), Rm interface answer+FPTS:1 and OK (page or leaf receives correct).G3 facsimile protocol processing section sends AT+FDT to the RM interface again, after receiving CONNECT, send the 2nd page data,, otherwise send end-of-data mark if the data that will send repeat above flow process in addition, after receiving OK, send AT+FET=2 (send and finish), Rm interface transmission+FPTS:1 (receiving successfully) ,+FHNG:0 (hanging up) and OK, thereby finish whole flow process, the speech state of acquiescence is responsible for returning in last G3 facsimile protocol processing section.
The process of receiving fax is basic identical with the flow process of sending a fax, and difference is:
Entering before the fax pattern do not continue, G3 facsimile protocol processing section sends AT+FCR=1 (allowing to receive) order to the Rm interface;
Before transmitting data, G3 facsimile protocol processing section sends AT+FDR (preparing to receive) order rather than AT+FDT order to the Rm interface;
The EOP received of G3 facsimile protocol processing section is masked as＜DLE in addition〉＜ETX〉(0x100x03), flow process finishes at first to discharge link by facsimile machine.
Utilize IWF to realize that the difficult point of G3 facsimile service is at the above-mentioned cdma network that passes through: because the aerial Um Interface wireless data link of cdma network is based upon on the RLP agreement, time delay is bigger, and present version support hardware Flow Control not, so under the clear transport protocol pattern, can can't guarantee to order transmission and respond the real-time of returning, timeout issue often occur; And the G3 facsimile protocol needs the channel of Millisecond to switch and the response time when a lot of links is arranged, so the real-time of G3 facsimile machine data communication in present cdma network agreement can not get guaranteeing.
The method that the present invention addresses this problem is: adopt a bigger transmission to handle in real time with the G3 facsimile machine with the reception buffering area in the CDMA protocol processing unit and communicate by letter, some data of communicating by letter with the G3 facsimile machine are kept in, come level and smooth by this buffering area with the communication delay of this device, carrying out adopting in the call phase A process pseudo-frame to come emulation G3 facsimile machine response signal, keep call link simultaneously with IWF.
The embodiment of the invention utilizes data buffering and over-the-air protocol bag emulation technology to realize the administrative mechanism of buffering area, solves the G3 facsimile data transmission wild effect that CDMA circuit type data service time delay causes.
Claims (14)
1, a kind of device by cdma network realization G3 fax is characterized in that, comprises CDMA module, fax modem interface circuit and user interface circuit, wherein:
Described CDMA module links to each other with user interface circuit with the fax modem interface circuit, is used for the platform as transmission of wireless signals;
Described fax modem interface circuit is connected with the CDMA module, is used to finish the analog facsimile signal of external G3 facsimile machine and the conversion between the CDMA module by signal, finish simultaneously according to facsimile protocol and the CDMA module between facsimile communication procedure;
Described user interface circuit is connected with external G3 facsimile machine with the CDMA module, be used to set up and fax modem between the analogue simulation data channel.
2, according to the described device of claim 1, it is characterized in that, described device further comprises the telephone interface circuit, link to each other with the analog port of described user interface circuit respectively, be used to finish the transmission of analog signal between external G3 facsimile machine and the fax modem interface circuit with the fax modem interface circuit.
According to the described device of claim 1, it is characterized in that 3, described CDMA module comprises:
The CDMA RF processing unit, the transmitting and receiving of modulation, CDMA data that is used to finish the CDMA data carried out Signal Pretreatment for the CDMA protocol processing unit simultaneously;
The CDMA protocol processing unit is used to finish the CDMA Channel protocol processes.
According to the described device of claim 1, it is characterized in that 4, described fax modem interface circuit is connected with the Rm interface of CDMA module by the UART interface.
5, according to the described device of claim 1, it is characterized in that, described fax modem interface circuit according to facsimile protocol finish with the CDMA module between the facsimile protocol of communicating by letter comprise: V.17, V.19, V.27ter and V.21 channel 2, TIA/EIA-578 Class 1 or T.31 Class1.0 facsimile protocol.
According to the described device of claim 1, it is characterized in that 6, described user interface circuit is connected with external G3 facsimile machine by the Z interface.
7, a kind of method by cdma network realization G3 fax is characterized in that, may further comprise the steps:
(1) user interface circuit receives the analogue simulation data of the external G3 facsimile machine transmission that is attached thereto;
(2) the fax modem interface circuit is converted to the digital fax data with the analogue simulation data that external G3 facsimile machine sends;
(3) the CDMA module is converted to the facsimile data of CDMA SDL form with the digital fax data, and transmits by cdma network.
8, according to the described method of claim 7, it is characterized in that, further comprise the steps:
The a.CDMA module receives the facsimile data of CDMA SDL form in the cdma network, and is converted into the digital fax data;
B. the fax modem interface circuit is converted to the analogue simulation data with the digital fax data;
C. user interface circuit sends to external G3 facsimile machine with the analogue simulation data.
9, described according to Claim 8 method, it is characterized in that, described step a comprises: the CDMA RF processing unit of CDMA module receives the facsimile data of CDMA SDL form in the cdma network, and is converted into the digital fax data by the CDMA protocol processing unit.
According to the described method of claim 7, it is characterized in that 10, described method further comprises: user interface circuit transmits the analog facsimile signal that external G3 facsimile machine sends by the telephone interface circuit that is attached thereto to the fax modem interface circuit.
According to the described method of claim 7, it is characterized in that 11, described digital fax data are the HDLC frame data.
According to the described method of claim 7, it is characterized in that 12, described step (3) comprising:
The CDMA protocol processing unit of CDMA module is converted to the facsimile data of CDMA SDL form with the digital fax data, and by the emission of CDMA RF processing unit, transmits by cdma network.
13, according to the described method of claim 7, it is characterized in that, described method utilizes data buffering and over-the-air protocol bag emulation technology to solve the G3 facsimile data transmission instability that CDMA circuit type data service time delay causes, and realizes that cdma network receives the administrative mechanism of buffering area.
According to the described method of claim 7, it is characterized in that 14, described step (1) user interface circuit receives the analogue simulation data that the G3 facsimile machine sends by the Z interface.
Priority Applications (1)
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| CN2006100575042A CN101035179B (en) | 2006-03-09 | 2006-03-09 | Device and method for realizing the G3 fax via the CDMA network |
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| CN2006100575042A CN101035179B (en) | 2006-03-09 | 2006-03-09 | Device and method for realizing the G3 fax via the CDMA network |
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| CN101035179B CN101035179B (en) | 2010-12-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011026297A1 (en) * | 2009-09-02 | 2011-03-10 | 中兴通讯股份有限公司 | Device, transmission and reception method for enabling wireless group 3 (g3) analog facsimile services |
| CN102088537A (en) * | 2010-12-14 | 2011-06-08 | 厦门锋联信息技术有限公司 | Wireless facsimile system |
| CN107948459A (en) * | 2017-11-03 | 2018-04-20 | 延安大学 | A kind of transmission equipment and its transmission method based on short wave communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2773296B1 (en) * | 1997-12-31 | 2000-01-21 | Alsthom Cge Alcatel | SUBSCRIBER CARD, SUBSCRIBER CONNECTION UNIT, AND SWITCHING CENTER FOR CONCENTRATING INTERNET FRAMES |
| CN1126356C (en) * | 2000-04-11 | 2003-10-29 | 深圳市中兴通讯股份有限公司 | Multifunctional ISDN digital telephone set |
| EP1162816A1 (en) * | 2000-06-09 | 2001-12-12 | Alcatel | Detection by a PBX of an incoming call from a modem |
| KR100624786B1 (en) * | 2004-01-29 | 2006-09-19 | 엘지전자 주식회사 | Server system communicating through the wireless network |
| CN100514933C (en) * | 2005-01-25 | 2009-07-15 | 南开大学 | Communicating network exchanging system and controlling method based on parallel buffer structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011026297A1 (en) * | 2009-09-02 | 2011-03-10 | 中兴通讯股份有限公司 | Device, transmission and reception method for enabling wireless group 3 (g3) analog facsimile services |
| CN101651958B (en) * | 2009-09-02 | 2012-12-19 | 中兴通讯股份有限公司 | Method and device for transmitting and receiving wireless G3 analog facsimile business |
| CN102088537A (en) * | 2010-12-14 | 2011-06-08 | 厦门锋联信息技术有限公司 | Wireless facsimile system |
| CN107948459A (en) * | 2017-11-03 | 2018-04-20 | 延安大学 | A kind of transmission equipment and its transmission method based on short wave communication |
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| CN101035179B (en) | 2010-12-08 |
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