CN2870320Y - CDMA fixed wireless telephone set - Google Patents

Abstract

The utility model relates to a CDMA fixed wireless telephone designed for traditional desktop telephone. The principal circuit comprises a wireless air interface unit for signal communication with the base station, a conventional telephone combination including a man-machine interface unit and a conventional telephone electroacoustic unit, a central processing unit (the core of the complete terminal and central processing control), an information management database unit and a SIM card holder. The central processing unit is liked to the serial port D2 which is linked to the physical interface for external connection with PC or network or telephone mesh-wire. The utility model takes use of the wireless communication module of the mobile phone to make phone calls through the air channel and the system base-station provided by CDMA mobile communication system. The utility model provides strong business functions to desktop telephone and can effectively avoid the interference of radio waves on the communication terminal.

Description

A kind of CDMA fixed wireless telephone

Technical field

The utility model relates to a kind of cdma wireless telephone set, be meant especially that a kind of wireless communication technology combines with the telephone terminal technology, directly use the cellular phone machine of mobile telephone set function module, CDMA standard band SIM card.

Background technology

In the communications industry, telephone occupies bigger advantage on communications cost, but needs the special configuration communications cable, makes its range of application be subjected to the restriction of region significantly.For the phone setting in some special locations, engineering cost becomes main cost factor, so mobile communication system occurred.Along with the popularization and application of GSM public's cell mobile communication systems, customer volume in the ratio of basic capacity and population, can't satisfy the growth requirement of mobile communication near saturated.But spread spectrum technic increasingly mature that is used for military communication along with the U.S., commercial applications has had the good technical basis, thereby be born based on the cdma cellular mobile communication system of spread spectrum technic, almost also released simultaneously and can be linked into the fixing radio telephone that the cdma cellular mobile communication system communicates by wireless channel.Compare with GSM public's cell mobile communication systems, CDMA public's cell mobile communication systems has bigger power system capacity and the channel capacity of Geng Gao, and the CDMA system also possesses characteristics such as anti-interference good, strong security; The what is more important cdma system is the necessary stage of future communications technical development.Union of International Telecommunication specifies five third generation system standards that are used for public land mobile communication at present, and wherein three individual system standards are to be basic fundamental (comprising TD-SCDMA, CDMA2000, WCDMA) with CDMA.Wherein, WCDMA is the direct upgraded version of the CDMA mobile communication system of popularization and application at present.Yet, in the CDMA fixed wireless telephone of open release at present, the simple combining form of all adopting conventional telecommunication terminal application function to combine on the functional mode with the cdma wireless air interface, in the electroacoustic function aspects, do not consider the influence of wireless interference to communication terminal, to such an extent as to speech quality often is difficult to reach the speech quality of wire communication, Chinese ZL200420034890.X patent " fixed telephone that can replace mobile phone in the certain place " design of showing of giving just belongs to this type of.On the other hand, CDMA fixed wireless telephone on the market is based on the cdma cellular mobile communication system of present extensive use, do not possess independently data communication function (being GPRS), make the function expansion of product be restricted, do not continue the potentiality of upgrading, and underintegration, not only production cost is too high, and unstable properties.

The utility model content

The problem that the utility model need solve provides a kind of self exclusive channel of utilizing and produces the CDMA system fixed wireless telephone that glitch-free independent electroacoustic is guaranteed speech quality and has the subsequent expansion ability.

Designed a kind of CDMA fixed wireless telephone according to the above-mentioned problem that needs to solve, the tradition seat formula that is shaped to telephone set as this telephone set of terminal, main circuit comprise with the base station realize signal contact the wireless air interface unit, comprise the routine call combination and the CPU of human and machine interface unit and routine call electroacoustic unit, it is characterized in that CPU is meant single-chip microcomputer or microprocessor D1, this CPU connects with serial port chip D2, and serial port is connected to the physical interface for external computer or network connectivity or telephone network line grafting; Connect with man-machine interface, hand-free function and control unit thereof, hook switch and motion detector circuit thereof in the routine call combination as the CPU of whole terminal and central processing controls core, CPU also connects with information management database unit and SIM card seat circuit.

During concrete enforcement, between serial port and physical interface, be provided with phone network access or the diverter switch SW1-A that connects with the outside, SW1-B.And the pin 18,19,20,22,23 of serial port chip D2 connects with the pin 19,13,20,42,22 of single-chip microcomputer or microprocessor D1 by contact DSR2, RING_PUT, CTS2, DCD2, RTS2 respectively; D2 connects with physical interface by pin 5,6,7,8,9,11,12; The pin 21,24 of D2 connects with diverter switch SW1-A, SW1-B by contact RXD_COM, TXD_COM respectively.SIM card seat circuit connects with CPU by contact VCC_OUT, UIM_RST, UIM_CLK, UIM_IO.

1,2,3,4 pin of CPU D1 connect with hands-free miaow head and telephone handle miaow head by contact MIC2P, MIC2N, MIC1P, MIC1N respectively, obtain voice signal; 9,10,11,12 pin of D1 connect with loud speaker by contact SPK1P, SPK1N, SPK2P, SPK2N, and the audio signal that telephone set is received is reduced to voice signal by loud speaker; 33 pin of D1 connect with 14 pin and 26 pin of serial port chip D2 by contact VCC_OUT; The 23-28 pin of D1 connects with power circuit, realizes power supply control and obtains operating voltage; 6 pin of D1 connect with mains switch by contact PWR_PHONE; 45,46,47,48 pin of D1 connect with display by contact CS, SDA, SCK, D_C; 69-78 pin and the keypad interface of D1 link.

The utility model organically is combined into one conventional fixed telephony and mobile communication technology, the citation form of performance is: utilize the telephone set that forms outward appearance and mode of operation and general line telecommunications fixed telephone basically identical with the basic telephony feature circuit of the essentially identical wireless communication module configuration of mobile phone (mobile phone), but the channel of communication is not by the line telecommunications fixed network and the network switching equipment thereof, but by air traffic channel and system base-station and system centre (comprising the systems exchange center) that CDMA mobile communication system provided.It designs brevity and lucidity, implementation process is simple, be effective through prior art is organically recombinated and solved the interference problem of radio wave communication terminal, conventional fixed phone (wired and wireless) not available business function and network upgrade function have been expanded simultaneously, the various functions of mobile phone and the man-machine interface of fixed telephone combine, constitute principal character of the present utility model, and reserved the space for further expanding from now on.

Description of drawings

Accompanying drawing 1 is the connection schematic diagram of the utility model in practicality; Accompanying drawing 2 is circuit logic design schematic block diagrams of the present utility model; Accompanying drawing 3 is correlation block diagrams of the further concrete function of accompanying drawing 2; Accompanying drawing 4 is schematic block circuit diagram of the utility model phone part; Accompanying drawing 5 is circuit theory schematic diagrames of central control unit in the utility model; Accompanying drawing 6 is circuit theory schematic diagrames of serial port in the utility model; Accompanying drawing 7 is circuit theory schematic diagrames of SIM card seat in the utility model; Accompanying drawing 8 is circuit theory schematic diagrames of diverter switch in the utility model.

Embodiment

Purport of the present utility model is to make the CDMA mobile phone of baseization have more practicality when utilizing its function of being convenient to move, particularly utilizes big memory function etc. to adapt to business needs.Its essence is exactly to propose mobile communication terminal core component on a kind of mobile communication system platform of the CDMA of utilization system and correlation technique thereof in conjunction with specific, conventional and based on the fixed wireless telephone that the telephone terminal technology of telecommunications fixed network is combined, and is embodied in:

(1) utilizes the of the present utility model core function unit of the acp chip support of CDMA as the CDMA mobile communication system terminal, auxilliary supporting landline telephone circuit and human and machine interface unit are supported circuit, thereby form distinctive can making a call or as called fixed telephone by the CDMA mobile communication system platform;

(2) the message registration book of mobile phone and business function such as operational administrative, telephone directory book and operational administrative thereof thereof and fixed telephone is specific man-machine interface combines.

(3) human and machine interface unit comprises special supporting keyboard and testing circuit, LCD demonstration and drive circuit thereof, telephone set condition indication circuit, microphone operation and the hands-free operation automatic control signal feedback circuit of expecting someone's call.The single-chip microcomputer of CPU or microprocessor D1 detect the customizing messages that is produced with the input combination of obtaining man-machine interface in real time in the telephone set, through Treatment Analysis, control corresponding execution unit by the program of working out in advance in the CPU according to the operational motion of man-machine interface appointment and realize corresponding operation, comprise the connection of control wireless air interface realization, realize caller and the called and pairing operations of keyboard the cdma wireless mobile communication system.

(4) in the output combined aspects of man-machine interface, CPU is handled in the man-machine interface input information under special program control, except the correctness that the content confession user who shows the feedback input operation by LCD confirms to operate, also under special program control, user's operational motion target information content is shown to the user by LCD, is beneficial to next step operation of user.

The utility model is described in further detail by accompanying drawing below.

Fig. 1～4 have provided functional block diagram of the present utility model and realizing route.The utility model has the characteristics that are different from other type of market aspect following:

1, takes into full account matching properties between cdma wireless air interface module and the basic electroacoustic functional unit, guarantee high-quality speech.

2, take into full account the sustainable development of technology.Aspect the selection of the MRP of central control unit and wireless air interface type, adopted the module of supporting the CDMA data service, make the utility model both can support current simple and direct data applied business demand, can support data communication function by simple technological improvement again based on CDMA.

3, for the utility model, the characteristic of " commercial affairs " is mainly reflected in to be transplanted to the business function on the mobile phone on the fixed telephone, makes conventional Telephone set also can partly realize business function, thereby improves the application function of office telephone.

The utility model mainly is made up of six parts:

1, wireless air interface unit---be meant the wireless air interface of CDMA mobile communication system.On the fixed wireless telephone terminal of the utility model, adopt a kind of commercially available standard module to constitute the needed hardware components of wireless connections of interface.From basic function, the wireless air interface module itself is exactly a Core Feature part that does not dispose the cdma wireless mobile phone of keyboard.The wireless air interface role is similar to the interface section at telephone cable and two ends thereof, and just channel is not a wire medium, but the wireless air channel, and aspect neither wire medium voltage and current down, but electromagnetic wave in the air.Adopt serial port chip D2 and joining physical interface thereof during specific implementation, and between physical interface and serial port, be provided with diverter switch SW1-A, SW1-B.

But 2, routine call electroacoustic unit---wireless air interface unit role only is the channel effect that forms communication between telephone terminal and the CDMA mobile communication system, and it is in the nature radio equipment.The radio equipment role is conformance with standard phone electroacoustic signal modality conversion is become the signal aspect that can propagate aloft, or the on-air radio signal that send the CDMA mobile communication system base station is reduced to the phone electroacoustic signal form of standard by radio equipment.Therefore as telephone terminal, the standard compliant electroacoustic functional part part that is absolutely necessary.The phone electroacoustic partly comprises bell signal detection and ring generation circuit, the busy tone of cdma system end transmission and the treatment circuit of the various types of signal such as ring-back tone detection that dial in receiver, microphone audio frequency such as (or pick-ups) input and output device and drive circuit thereof, off-hook or hook state detection, the audio call, all belongs to conventional electroacoustic functional circuit part.

3, man-machine interface assembled unit---be meant the collecting and distributing combination of functional units such as comprising keyboard, LCD and drive circuit thereof, power supply and SOT state of termination indicator light.

4, information management database unit---in the fixed wireless telephone of the utility model, information management database one of the functional unit that is absolutely necessary comprises the application of following aspect:

(1) storage of data message.In fixed wireless telephone, owing to compare based on cdma cellular mobile communication system platform and conventional telecommunication terminal, data-message is one of critical function of such communication terminal, and bigger data space becomes one of basic demand.

(2) one of basic function of cdma wireless mobile phone is jumbo telephone number information memory function.The essence of this class function is to make terminal to have sufficient commercial support function.

(3) differently with conventional telecommunication terminal be, the CDMA fixed wireless telephone has followed the full-digital circuit characteristics of cdma wireless mobile phone, and all kinds of state informations (signal monitoring that comprises each necessary resources of CPU itself, power supply, man-machine interface, telephone channel monitoring, wireless air interface with control etc.) all need to be provided with state information confession CPU and call at any time.

The task of 5, CPU---CPU comprises following several respects:

One, protocols is according to the rules carried out control and management to wireless air interface; Its two, according to set protocols SIM card and interface message thereof are controlled and are managed; Its three, electroacoustic information (for example bell signal, busy tone etc.) detected carries out control and management; Its four, the operational motion of man-machine interface is handled and is carried out corresponding software according to protocols, realize correlation function; Its five, database and the state information of being stored thereof and commercial matters information are carried out control and management.During specific implementation, the main body of CPU is single-chip microcomputer or microprocessor D1.

6, also have in addition that indispensable power subsystem---the functional unit that is responsible for above-mentioned five aspects provides power.

Fig. 3,4 has provided communication channel between each unit and phone when the using signal flow between each circuit unit to.Below operation principle of the present utility model and protocol process are summarized as follows.

1, initiates to breathe out as caller.

(1) when this telephone set is breathed out as caller, the destination phone numbers that the user at first utilizes the telephone keyboard input to call out sends called party information (wherein include caller information and realize incoming call display function for the other side) by " affirmation " key then.This dial mode is called " default dialing ".The user also can press " hands-free " key earlier, and telephone set to be heard is imported called telephone number by telephone keyboard after sending dialing tone again.This dial mode is called " online dialing ".

(2) keyboard information judges that by central processing unit (embedded scm is MCU) institute dials the number, and is sent the number of process coding then by central processing unit.

(3) number information of Bo Chuing is input to the gsm wireless air interface module of this telephone set by the data port of phone, by module base band data (being the signal of low frequency) is converted to digital coding (purpose is to reduce the wireless transmission time and improves antijamming capability), is converted to the radiofrequency signal that can be used as the radio magnetic wave emission then and supplies the base station of GSM cell mobile communication systems to receive.

(4) call information is realized interconnecting and communicating by letter by the wireless air interface and the base station of GSM cell mobile communication systems, after subscription authentication is carried out to this telephone set in the base station, call information is transferred to GSM cell mobile communication systems center (local network center, down with).

(5) if terminal called is the native system terminal, then by GSM cell mobile communication systems center Query Database, to determine the position at the present place of terminal called, call out terminal called and finish continuing between the calling and called behind the called party answer by the soft switch mode then, transmission caller information (Subscriber Number) shows for terminal called.

(6) if terminal called is non-native system terminal, then directly directly call information is forwarded to target office according to called number preceding office number (for example 139,138,261,357 or the like) or trunk code (for example 0752,010 etc.) by GSM cell mobile communication systems center, extract corresponding information and processing by target office, call out terminal called and complete connection then.

2, accept incoming call as called

(1) when this terminal is received the call-in message of transmitting by the base station of GSM cell mobile communication systems, at first the information content is judged examination by central processing unit, confirm to belong to incoming call, send the required AC driving signal of " ring " control signal and ring then.

(2) ringing circuit is being unlocked under the control of central processing unit and is making buzzer or loud speaker send the sound of certain rule under the driving of ring AC signal.

(3) when the user hears sound and determines incoming call answering, when pressing " answering " or " OK " key, after central processing unit is accepted key information and is judged as " OK " key, send " replying " information to GSM cell mobile communication systems center by GSM cell mobile communication systems base station.The information of " replying " at the signal processing of this telephone set inside with above-mentioned consistent during Sending dialled number information during as caller.

(4) continuing between the calling and called can be finished after receiving response message in GSM cell mobile communication systems center.

3, talking state summary

(1) this telephone set as caller or as promptly enter behind called and the complete connection and the other side between talking state.

(2) under the talking state, receive and send to the other side from the speech of this locality, after reduction is handled, send to local hearer to the voice signal that receives the other side, without central processing unit, but independently finish, but be in all the time under the monitoring of central processing unit by phone electroacoustic circuit independently.

(3) in case end of conversation after central processing unit detects corresponding marking signal, enters corresponding end process process and allow telephone set enter initial holding state again at once.

When concrete circuit design and assembling, angle from conserve space and simplification circuit, main circuit such as core circuit module (containing CPU), routine call combination, signal connection device (containing the wireless air interface unit), external memory storage (containing the information management database unit) are formed the radio frequency module and be assemblied on the pcb board, then this pcb board is inserted on the conventional pcb board socket, mainboard and telephone set content are succinctly smooth thus.At this moment, between serial port and physical interface, be provided with phone network access or the diverter switch SW1-A that connects with the outside, SW1-B.And the pin 18,19,20,22,23 of serial port chip D2 connects with the pin 19,13,20,42,22 of single-chip microcomputer or microprocessor D1 by contact DSR2, RING_PUT, CTS2, DCD2, RTS2 respectively; D2 connects with physical interface by pin 5,6,7,8,9,11,12; The pin 21,24 of D2 connects with diverter switch SW1-A, SW1-B by contact RXD_COM, TXD_COM respectively.The SIM card seat circuit that plays the operating switch effect connects with CPU by contact VCC_OUT, UIM_RST, UIM_CLK, UIM_IO.1,2,3,4 pin of CPU D1 connect with hands-free miaow head and telephone handle miaow head by contact MIC2P, MIC2N, MIC1P, MIC1N respectively, obtain voice signal; 9,10,11,12 pin of D1 connect with loud speaker by contact SPK1P, SPK1N, SPK2P, SPK2N, and the audio signal that telephone set is received is reduced to voice signal by loud speaker; 33 pin of D1 connect with 14 pin and 26 pin of serial port chip D2 by contact VCC_OUT; The 23-28 pin of D1 connects with power circuit, realizes power supply control and obtains operating voltage; 6 pin of D1 connect with mains switch by contact PWR_PHONE; 45,46,47,48 pin of D1 connect with display by contact CS, SDA, SCK, D_C; 69-78 pin and the keypad interface of D1 link.So far, the assembling of the circuit of whole telephone set is accomplished, and telephone set is dispatching from the factory through packing behind the system test.

Claims (5)

1, a kind of CDMA fixed wireless telephone, the tradition seat formula that is shaped to telephone set as this telephone set of terminal, main circuit comprise with the base station realize signal contact the wireless air interface unit, comprise the routine call combination and the CPU of human and machine interface unit and routine call electroacoustic unit, it is characterized in that CPU is meant single-chip microcomputer or microprocessor D1, this CPU connects with serial port chip D2, and serial port is connected to the physical interface for external computer or network connectivity or telephone network line grafting;

Connect with man-machine interface, hand-free function and control unit thereof, hook switch and motion detector circuit thereof in the routine call combination as the CPU of whole terminal and central processing controls core, CPU also connects with information management database unit and SIM card seat circuit.

2, CDMA fixed wireless telephone according to claim 1 is characterized in that being provided with phone network access or the diverter switch SW1-A that connects with the outside, SW1-B between serial port and physical interface.

3, CDMA fixed wireless telephone according to claim 2 is characterized in that the pin 18,19,20,22,23 of serial port chip D2 connects with the pin 19,13,20,42,22 of single-chip microcomputer or microprocessor D1 by contact DSR2, RING_PUT, CTS2, DCD2, RTS2 respectively; D2 connects with physical interface by pin 5,6,7,8,9,11,12; The pin 21,24 of D2 connects with diverter switch SW1-A, SW1-B by contact RXD_COM, TXD_COM respectively.

4, CDMA fixed wireless telephone according to claim 1 is characterized in that SIM card seat circuit connects with CPU by contact VCC_OUT, UIM_RST, UIM_CLK, UIM_IO.

5, CDMA fixed wireless telephone according to claim 1 is characterized in that 1,2,3,4 pin of CPU D1 connect with hands-free miaow head and telephone handle miaow head by contact MIC2P, MIC2N, MIC1P, MIC1N respectively, obtains voice signal; 9,10,11,12 pin of D1 connect with loud speaker by contact SPK1P, SPK1N, SPK2P, SPK2N, and the audio signal that telephone set is received is reduced to voice signal by loud speaker; 33 pin of D1 connect with 14 pin and 26 pin of serial port chip D2 by contact VCC_OUT; The 23-28 pin of D1 connects with power circuit, realizes power supply control and obtains operating voltage; 6 pin of D1 connect with mains switch by contact PWR_PHONE; 45,46,47,48 pin of D1 connect with display by contact CS, SDA, SCK, D_C; 69-78 pin and the keypad interface of D1 link.

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