CN101150471A - Broadband radio access system and method - Google Patents
Broadband radio access system and method Download PDFInfo
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Abstract
The invention provides a system and a method for broadband wireless access; wherein, the broadband wireless access system consists of a control subsystem, an access subsystem and a WIFI wireless access subsystem. The control subsystem is connected to the access subsystem and directly connected to the user terminal and/or connected to the WIFI wireless access subsystem through the Ethernet port to connect the user terminal in order to receive the input parameters from the user terminal directly or through the WIFI wireless access subsystem and invokes the background processing programs to convert the input parameters into AT commands which are transmitted to the subsystem. The access subsystem, which is connected wirelessly to the user external network, is used for receiving the AT commands from the control subsystem, resolving the AT commands and invoking the corresponding internal function in order to connect or disconnect the user terminal with the external networks. The WIFI wireless access subsystem, which is wirelessly connected to the user terminal, is used for receiving the input parameters from the user terminal and transmitting the input parameters to the control subsystem.
Description
Technical field
The present invention relates to communication system, relate in particular to a kind of BWA and broadband wireless access method.
Background technology
In the information communication field, two big technology with the fastest developing speed, that people are had the greatest impact are exactly broadband network technology and wireless mobile telecommunication technology, and the combination of these two big technology is wireless access wide band technology.Communication link adopted the broadband access technology of Radio Link between wireless access wide band technology referred to from the user terminal to the Service Switching Point.
Wireless access wide band technology can be divided into this three class of local broadband wireless access, metropolitan area broadband wireless access and wide area network wireless access wide band technology on coverage.And on support terminal mobility whether, wireless access wide band technology can be divided into the mobile broadband wireless access technology and fixed broadband wireless inserts.The mobile broadband wireless access technology mainly is meant 3G (Third Generation) Moblie technology (3G), as WCDMA (Wideband Code Division MultipleAccess, WCDMA mobile communication system)/HSDPA (High Speed DownlinkPacket Access, high-speed downlink packet inserts), CDMA2000 (Code DivisionMultiple Access 2000, CDMA 2000) etc.This class mobile communication technology support terminal mobility can realize the broadband wireless access under the terminal mobile status, but under different translational speeds, access bandwidth may be different.
The target of 3G mobile communication system provides the mobile broadband multimedia communication, and multi-access mode substantially all adopts the CDMA multiple access to insert, and belongs to the wideband CDMA mobile communication technology.The 3G mobile communication system can provide polytype high-quality multimedia service, can realize global seamless covering, has global roaming ability and compatible mutually with fixed network.It can realize the small portable terminal at any time, any place carries out the communication of any kind of.The standardization effort of 3G mobile communication technology is promoted and is implemented by 3GPP and two standardization bodies of 3GPP2.
Along with the particularly quickening of WCDMA/HSDPA network commercialization process of 3G network in the world, the fast development of 3G business brings the terminal diversified demand, comprises wireless data card, mobile phone, wireless access box.At present, the WCDMA of money more than 300 end product has been released in the world market, HSDPA (high speed downlink packet access) technology that wherein has 14 sections of product supports to use towards WiMAX.
But the present 3G wireless access terminal of releasing mainly is positioned high-end business users and the user of enterprises and institutions, can't spread to common (PC) user, and spread to user under the remote geographical environment to voice and broadband data service demand.
For business users, along with its demand to mass data business and mobile office, operator, communication manufacturer, expert data card enterprise, notebook manufacturer cut wireless Internet card market from angle separately one after another interior industry giant.But wireless data card is only applicable to high-end notebook online at present, can't satisfy common pc user's wireless Internet access demand, and be subjected to the influence of price, makes wireless mobile office fully do not discharged with universal.
For the enterprise customer, satisfying accessing terminal of getting online without being tethered to a cable at present mainly is wireless router, can satisfy the online of a plurality of PC or notebook terminal, but its inside is actually PC and adds the wireless Internet card technical solution, bring price very high, can't spread to the requirement that individual or domestic consumer get online without being tethered to a cable.
For the user who uses PC, existing 3G mobile wireless accesses terminal, mainly be based on PC serial ports connection wireless modem (modulator-demodulator) and realize wireless networking capabilities, but since the serial ports speed limit, the wideband multimedia characteristic that can't utilize 3G to net.Simultaneously, need special PC side software, increased user's use burden and specification requirement.
Use the 3G mobile wireless of USB port to access terminal,, be subjected to being connected the restriction of distance, can't make the signal reception of wireless access terminal reach best, thereby may influence communication quality and speed with PC though can reach high rate communication.
The Public CDMA WLL of Tui Chuing, wireless network card, wireless router in the market, perhaps function singleness, voice separate with data service, perhaps cost an arm and a leg, and can't popularize.Particularly for remote districts, under wired geographical environment that is beyond one's reach, the user will realize voice and data service, will have to buy two kinds and access terminal, and has both increased cost, has also increased user's technology burden.
In sum, multiple factors such as technology, market, resource, competition will force operator in the maximized while of realizing professional expansion, satisfy users on diversity, for the equipment supplier, then to reduce the wireless access terminal cost, improve profit, strengthen the competitiveness of product on market.
Summary of the invention
One or more problems in view of above the present invention proposes a kind of BWA and method, adopt two embedded microprocessors, and the Ethernet 10/100M interface that support is connected with PC is supported WIFI AP function.The user can realize the requirement of HSDPA high speed Internet access by Ethernet interface and WIFI network interface card, simultaneously by the basic talk business of RJ11 interface support.That is to say that the present invention utilizes the HSDPA network to realize the access of last kilometer of internet, utilize Ethernet interface and WIFI to realize that last hundred meters internet insert.
BWA according to the present invention comprises: control subsystem 102, be connected to access subsystem, and be connected directly to user terminal and/or be connected to WIFI wireless access subsystem and then be connected to user terminal by Ethernet interface, be used for directly or receive input parameter, call the background process program input parameter converted to the AT order and to send it to access subsystem from user terminal by WIFI wireless access subsystem; Access subsystem 104 is wirelessly connected to external network, is used to receive the AT order from control subsystem, and the respective inner function is resolved and called to order so that user terminal and external network connect or disconnect to AT; And WIFI wireless access subsystem 106, be wirelessly connected to user terminal, be used to receive from the input parameter of user terminal and send it to control subsystem.
Wherein, control subsystem also is used for carrying out data interaction between access subsystem and the user terminal or between access subsystem and WIFI wireless access subsystem after user terminal and external network connection.Access subsystem also is used for carrying out data interaction between control subsystem and external network after user terminal and external network connection.WIFI wireless access subsystem also is used for carrying out data interaction between control subsystem and user terminal after user terminal and external network connection.WIFI wireless access subsystem is supported the IEEE802.11b/g standard.Control subsystem is connected to access subsystem by USB interface.
User terminal comprises first external equipment and second external equipment, and wherein, first external equipment comprises at least a in the following equipment: personal computer, notebook computer, personal digital assistant; And second external equipment comprise the communication equipment of supporting the RJ11 interface.
Control subsystem comprises: interface module, be connected to user terminal and first processor respectively, and be used to receive input parameter, and input parameter is sent to first processor from user terminal; And first processor, be connected to access subsystem by USB interface, be used for after the input parameter that receives from interface module, call the background process program input parameter converted to the AT order and to send it to access subsystem.
Wherein, interface module comprises: Ethernet interface, be connected to first external equipment by the RJ45 interface, and be used between the first processor and first external equipment, carrying out data interaction; And telephone user interface, be connected to second external equipment by the RJ11 interface, be used between the first processor and second external equipment, carrying out data interaction.
Access subsystem comprises: second processor, be used to receive AT order, and the respective inner function is resolved and called to order so that user terminal and external network connect or disconnect to AT from control subsystem; And radio-frequency module, be connected to second processor, and be wirelessly connected to external network, be used for carrying out data interaction with external network.Second processor is to handling accordingly from the data of radio-frequency module and first processor respectively, handles to comprise following at least a operation: modulation uplink and downlink eat dishes without rice or wine signal, channel coding/decoding, encrypt/decrypt, audio coding decoding, coding and decoding video, analog/digital conversion and digital-to-analog conversion.
Broadband wireless access method according to the present invention may further comprise the steps: step S802, control subsystem directly or by WIFI wireless access subsystem receives input parameter from user terminal, and call the background process program input parameter is resolved input parameter is converted to the AT order, the AT order is sent to access subsystem; And step S804, access subsystem calls corresponding intrinsic function so that user terminal and external network connect or disconnect after the AT order that receives from control subsystem.
Wherein, control subsystem is being carried out data interaction between access subsystem and the user terminal or between access subsystem and WIFI wireless access subsystem after user terminal and external network connection.Access subsystem carries out data interaction between control subsystem and external network after user terminal and external network connection.WIFI wireless access subsystem carries out data interaction between control subsystem and user terminal after user terminal and external network connection.WIFI wireless access subsystem is supported the IEEE802.11b/g standard.
By broadband access system of the present invention and method, adopt two embedded microprocessors, the Ethernet 10/100M interface that support is connected with PC is supported WIFI AP function.The user can realize the requirement of HSDPA high speed Internet access by Ethernet interface and WIFI network interface card, simultaneously by the basic talk business of RJ11 interface support.That is to say that the present invention utilizes the HSDPA network to realize the access of last kilometer of internet, utilize Ethernet interface and WIFI to realize that last hundred meters internet insert.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the block diagram according to BWA of the present invention;
Fig. 2 shows the block diagram of BWA according to an embodiment of the invention;
Fig. 3 shows BWA block diagram according to a particular embodiment of the invention;
Fig. 4 shows the block diagram of the baseband processing module in the access subsystem of BWA;
Fig. 5 shows the block diagram of the control subsystem of BWA;
Fig. 6 shows the software architecture diagram according to BWA of the present invention;
Fig. 7 is the RJ45-USB interface protocol transition diagram according to the BWA of the embodiment of the invention;
Fig. 8 shows the flow chart according to broadband wireless access method of the present invention;
Fig. 9 shows the flow chart according to the method for BWA of the present invention; And
Figure 10 shows the flow chart that is provided with according to broadband mobile network network of the present invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Thereby, the invention provides a kind of WCDMA/GSM (Global System forMobile communication, global system for mobile communications)/GPRS (General PacketRadio Service, GPRS)/EDGE (Enhanced Data for GSMEvolution, the enhanced data rates for gsm evolution technology)/HSDPA (High SpeedDownlink Packet Access, high-speed downlink packet inserts) multi-mode wireless connecting system and method, it adopts two embedded microprocessors, the Ethernet 10/100M interface that support is connected with PC is supported WIFI AP function.The user can realize the requirement of HSDPA high speed Internet access by Ethernet interface and WIFI network interface card, simultaneously by the basic talk business of RJ11 interface support.That is to say that the present invention utilizes the HSDPA network to realize the access of last kilometer of internet, utilize Ethernet interface and WIFI to realize that last hundred meters internet insert.WIFI AP links to each other by Ethernet interface with master control system, utilizes exchange chip to carry out exchanges data.This connected mode is our characteristics, and the AP module of like product is all utilized the MINIPCI interface.
The present invention is directed to WCDMA/HSDPA broadband network characteristics, provide a kind of and realized that based on two flush bonding processors 3G net mobile broadband inserts and the System and method for of speech business.Mainly solve following technical problem: UI interface, network parameter setting between system and the subscriber's main station (PC/ notebook), be connected indication, IP bag transparent transmission and the protocol conversion etc. of controlling communications status; Control on Communication, network settings between control subsystem and the wireless access subsystem, be connected foundation, Ethernet interface and USB interface conversion; Wireless access system is to expansion parsing, wireless network setting, connection foundation, speech business and the data and the speech concurrent etc. of AT order.
Fig. 1 is the block diagram according to BWA of the present invention.As shown in Figure 1, this system comprises: control subsystem 102, be used for after the input parameter that receives from user terminal, and call the background process program input parameter is converted to the AT order; Access subsystem 104 is connected to control subsystem by USB interface, is used to resolve by the AT order of described interface from control subsystem, and calls relevant intrinsic function, user terminal and network are connected or disconnects; And WIFI wireless access subsystem 106, support IEEE 802.11b/g standard.WIFI wireless access system (AP) utilizes exchange chip to link to each other with control subsystem by Ethernet interface, by main control processor (first processor) signal forwarding is arrived access subsystem, realizes inserting the demand of internet.
WIFI AP provides standard (IEEE 802.11b/g) wireless signal to cover, the protocol processes that realization WIFI is all and the transmission/reception of radiofrequency signal.WIFI AP receives the signal that user WIFI wireless network card sends, and will receive signal forwarding to access subsystem; Simultaneously the signal that receives from access subsystem is transmitted to user WIFI wireless network card; By AP, the user does not need netting twine, just can realize having surfed the web like this.
Wherein, control subsystem also is used for carrying out data interaction between access subsystem and the user terminal or between access subsystem and WIFI wireless access subsystem after user terminal and external network connection.Access subsystem also is used for carrying out data interaction between control subsystem and external network after user terminal and external network connection.WIFI wireless access subsystem also is used for carrying out data interaction between control subsystem and user terminal after user terminal and external network connection.WIFI wireless access subsystem is supported the IEEE802.11b/g standard.Control subsystem is connected to access subsystem by USB interface.
Wherein, control subsystem comprises: interface module, and link to each other with described processing module, and be used to connect user terminal, receive input parameter from user terminal; Processing module (first processor) is used to carry out data processing, and after the input parameter that receives via interface module from user terminal, calls the background process program, input parameter is converted to the AT order.Control subsystem also can comprise: the DC/DC module is used to first processor and telephone user interface that direct voltage is provided; And USB interface, be used to connect first processor and interface module.Control subsystem also comprises the telephony interface submodule, is used to produce inner jingle bell, generation and decoding dual-tone multifrequency and produces complete telephone signal.
Interface module in the control subsystem comprises: Ethernet drive circuit (Ethernet interface), be connected with first external equipment by the RJ45 interface, thus the exchanges data between the realization first processor and first external equipment; Telephone user interface is connected with second external equipment by the RJ11 interface, thereby realizes the exchanges data between the first processor and second external equipment.Control subsystem also comprises: Serial Peripheral Interface (SPI) is connected to telephone user interface; And PCM (pulse code modulation) interface, be connected to telephone user interface.Wherein, first processor is an embedded microprocessor.User terminal comprises: first external equipment and second external equipment.First external equipment comprises: terminal equipments such as personal computer, notebook computer and personal digital assistant.Second external equipment comprises the communication equipment of supporting the RJ11 interface.
It mainly is by the DC/DC conversion module DC power supply of external input to be produced access module and the required power supply of control module by conversion that the system power supply of control subsystem provides, the big electric current demand when satisfying base band in the access subsystem and radio-frequency (RF) power amplification circuit working.
The hardware interface of control subsystem and access subsystem is a USB interface, and software interface is the AT order.AT (attention) order is the AT order of standard or expansion.
Control subsystem realizes mainly that system power supply provides, the conversion of subscriber phone interface circuit (SLIC), USB be to the transformation of RJ45 signal.By interface module, realize data function that user PC end is surfed the Net and the voice call function that passes through the external phone of RJ11.Wherein, second processor in first processor in the control subsystem (as arm processor) and the access subsystem is by the usb signal interface, convert Ethernet RJ45 interface link layer protocol to the USB serial communication protocol, realize the data service of user side PC by the RJ45 online.The speech business of substation is changed by the SLIC interface.When incoming call, access subsystem produces ring back tone by the interface control SLIC with control subsystem and notifies the user to receive calls, after the user answers, access subsystem is connected by pcm bus the caller voice signal with SLIC, SLIC realizes the voice bidirectional encoding and decoding between access subsystem and substation, realizes the speech communication function.
In above-mentioned HSDPA BWA, access subsystem 104 comprises: radio-frequency module, be used to receive and dispatch radiofrequency signal, and the radiofrequency signal that receives is sent to baseband module, for its processing; And baseband module, be used for up and/or downlink radio-frequency signal are carried out following at least a processing: modulation uplink and downlink eat dishes without rice or wine signal, channel coding/decoding, encrypt/decrypt, audio coding decoding, coding and decoding video, analog/digital conversion and digital-to-analog conversion.Access subsystem also can comprise power management module, is used for the management start, detects dynamic electric voltage and is system's power supply.Access subsystem also can comprise the telephony interface submodule, is used to produce inner jingle bell, generation and decoding dual-tone multifrequency and produces complete telephone signal.Access subsystem also can comprise status indicator lamp, is used to represent to switch on, the state of connection, signal strength signal intensity and incoming call.
In above-mentioned BWA, baseband module comprises: second processor; And power management module, be connected to second processor, be used to realize current conversion, be the power supply of second processor.Baseband module also comprises debugging interface, and second processor is a flush bonding processor.Wherein, debugging interface comprises JTAG serial ports and UART serial ports.Baseband module also comprises usim card interface and/or SIM card interface.
Radio-frequency module comprises radiating circuit, receiving circuit, wave band and transmit-receive switch selection, antenna and reference clock signal, is used to receive and dispatch radiofrequency signal.UMTS (Universal MobileTelecommunications System, Universal Mobile Telecommunications System) the radiating circuit function treatment is as follows: the UMTS that comes out from baseband module launches the I/Q modulation signal, after baseband amplifier and low-pass filtering, carry out up-conversion again, thereby form radio frequency transmissions from base band (BB) to radio frequency (RF).This signal passes through bandpass filtering again amplifying through automatic gain control amplifier, send power amplifier to amplify, and launches through isolator, duplexer, multimode switch and antenna successively more at last.In order to finish the control of UMTS maximum power, coupling radio frequency energy is used for carrying out the power voltage detection between power amplifier and isolator.
The receiving circuit function of radio-frequency module is: after the corresponding Surface Acoustic Wave Filter filtering of signal process of the next WCDMA/GSM frequency range of multimode switch, enter low noise, comprise gain control circuit, carrying out signal amplifies, send low-converter to finish conversion from RF to BB again, the I/Q baseband signal that forms send the baseband module master chip to handle through after common the baseband low pass filters filtering and DC offset correction after amplifying by baseband amplifier again.
Gating is selected, carried out respectively to wave band and transmit-receive switch between GSM-900RX, GSM-1800RX, GSM-1900RX, GSM-900TX, GSM-1800/1900TX and UMTSRX/TX, can strengthen the working time slot of power amplifier and the isolation between the non-communication time slot simultaneously.In addition, the GSM-900 in the circuit, the isolation that harmonic wave that GSM-1800 and GSM-1900 emission filter can suppress to launch and increasing receive.
Reference clock signal temperature compensation voltage-controlled (VTVCXO) crystal oscillator produces.This crystal oscillator provides the analog references clock signal of 19.2MHz for radio-frequency module, power module and baseband module.
Fig. 2 shows the block diagram of BWA according to an embodiment of the invention.As shown in Figure 2, BWA 200 comprises: control subsystem 202 be used for calling the background process program after the input parameter of receiving from user terminal, and conversion generates the AT order; And access subsystem 204, be connected to control subsystem by interface, be used to resolve by the AT order of interface, and call relevant intrinsic function from control subsystem, user terminal and network are connected or disconnect.Wherein, control subsystem 202 comprises: processing module (first flush bonding processor) 2022, first internal memory 2024, interface module (Ethernet interface) 2026 and exchange chip 2028.
Wherein, access subsystem 204 comprises: baseband module 2040; And radio-frequency module 2042, be used to receive and dispatch radiofrequency signal.Wherein, baseband module comprises: second flush bonding processor (second processor); Baseband signal processor is used for the modulation uplink and downlink signal of eating dishes without rice or wine, channel coding/decoding, encrypt/decrypt; And internal memory.Radio-frequency module 2042 comprises: radiating circuit, receiving circuit, wave band and transmit-receive switch selection, antenna and reference clock signal.
In addition, access subsystem 204 also comprises: power management module 2044 is used for the management start, detects dynamic electric voltage and is module for power supply; Telephony interface submodule 2046 is used to produce inner jingle bell, generation and decoding dual-tone multifrequency and produces complete telephone signal; And status indicator lamp 2048, be used to represent to switch on, the state of connection, signal strength signal intensity and incoming call.
Realize that at this interface is a USB interface in system 200 of broadband wireless access, user terminal is personal computer, notebook computer, personal digital assistant and the communication equipment of supporting the RJ11 interface etc.The AT order is the AT order of standard or expansion.
Fig. 3 shows the block diagram of BWA according to a particular embodiment of the invention.As shown in Figure 3, how the method that the embodiment of the invention has been described realizes high-speed radio access, network settings and link control procedure based on two flush bonding processors.Wherein, suppose that the user has been a certain WCDMA/HSDPA/GSM broadband mobile operator validated user and has had the USIM/SIM card that operator provides, and has the authority of wireless data and speech business.
Wherein, the process of transmitting of radio-frequency module 3042 is as follows:
(1) UMTS (WCDMA/HSDPA) network emission processing procedure: the UMTS emission I/Q modulation signal from baseband module comes out, after baseband amplifier and low-pass filtering, carry out the up-conversion from BB to RF again, thereby form radio frequency transmissions.This signal amplifies through automatic gain control amplifier, passes through bandpass filtering again, send power amplifier to amplify, and launches through isolator, duplexer, multimode switch and antenna successively more at last.In order to finish the control of UMTS maximum power, coupling radio frequency energy is used for carrying out the power voltage detection between power amplifier and isolator.
(2) GSM network emission processing procedure: the GSM that comes out from baseband module launches the I/Q modulation signal, behind baseband amplifier amplification, low-pass filtering and DC bias correction, carry out up-conversion again from base band (BB) to intermediate frequency (IF), the intermediate-freuqncy signal that forms utilizes the biasing phase-locked loop to carry out sending power amplifier to amplify after the polarization modulation again, launches through multimode switch and antenna successively more at last.
In addition, the receiving course of radio-frequency module 3042 is as follows:
(1) UMTS (WCDMA/HSDPA) network receives processing procedure: have low noise amplifier (LNA) amplification and reception bandpass filter filtering of gain controlling from the UMTS radio frequency receiving signal elder generation process that duplexer comes after, send low-converter to finish conversion from radio frequency (RF) to base band (BB), after the I/Q baseband signal process low pass filter filtering that forms, send baseband module to handle after amplifying by baseband amplifier again.
(2) the GSM network receives processing procedure: after the corresponding Surface Acoustic Wave Filter filtering of signal process for the next GSM frequency range of multimode switch, carrying out signal by LNA (comprising gain controlling) amplifies, send low-converter to finish conversion again from radio frequency (RF) to base band (BB), the I/Q baseband signal that forms send the MSM6280 master chip to handle through after common the baseband low pass filters filtering and DC bias correction after amplifying by baseband amplifier again.
Wherein, reference clock signal provides the analog references clock signal to radio-frequency module 3042, baseband module 3044 and power module 3046.Duplexer carries out gating respectively between GSM and UMTS signal transmitting and receiving, can strengthen the working time slot of power amplifier and the isolation between the non-communication time slot simultaneously.
Fig. 4 shows the block diagram of the baseband processing module in the access subsystem of BWA.As shown in Figure 4, the baseband portion of radio access module is mainly finished following function:
(1) WCDMA/HSDPA base band signal process and GSM/GPRS/EDGE base band signal process;
(2) memory (Flash, SRAM, SDRAM) access control, wherein SRAM (Static radom access memory) is a static memory, SDRAM (Synchronousdynamic random access memory) is a synchronous DRAM;
(3) power management: DC power supply is exported to power amplifier, power management and base band (processor) module for power supply through DC-DC (DC/DC) conversion (various direct voltage output); And
(4) debugging interface, usim card or SIM card interface such as JTAG and UART (Universal AsynchronousReceiver-Transmitter, universal asynchronous receiving system) serial ports.
Digital baseband chip is mainly by flush bonding processor, for example, ARM series processors kernel and two DSP finish all WCDMA/HSDPA and GSM/GPRS/EDGE base band signal process function jointly, comprise modulation, channel coding/decoding, audio/video encoding/decoding, A/D, the D/A etc. of uplink and downlink signal.
Baseband processor is supported two kinds of growth data buses.A kind of high speed data transfer that is used for is supported SRAM, SDRAM and BURST NOR FLASH, and another kind of bus then is used for supporting slow external equipment, and as NAND flash, SRAM etc. are used for program code stored and data.
Among Fig. 3, power management module 3046 is responsible for all power management functions, can receive programming and control, to export various needed direct voltages or electric current.SIM/USIM card 3048 is finished the read and write access of SIM/USIM card and control etc., by power management module to the SIM/USIM card, with adaptive its desired level.
Radio-frequency module comprises radiating circuit, receiving circuit, wave band and transmit-receive switch selection, antenna and reference clock signal, is used to receive and dispatch radiofrequency signal.UMTS radiating circuit function treatment is as follows: the UMTS emission I/Q modulation signal from baseband module comes out, after baseband amplifier and low-pass filtering, carry out the up-conversion from base band (BB) to radio frequency (RF) again, thereby form radio frequency transmissions.This signal passes through bandpass filtering again amplifying through automatic gain control amplifier, send power amplifier to amplify, and launches through isolator, duplexer, multimode switch and antenna successively more at last.In order to finish the control of UMTS maximum power, coupling radio frequency energy is used for carrying out the power voltage detection between power amplifier and isolator.
The receiving circuit function of radio-frequency module is: after the corresponding Surface Acoustic Wave Filter filtering of signal process of the next WCDMA/GSM frequency range of multimode switch, enter low noise, comprise gain control circuit, carrying out signal amplifies, send low-converter to finish conversion from RF to BB again, the I/Q baseband signal that forms send the baseband module master chip to handle through after common the baseband low pass filters filtering and DC offset correction after amplifying by baseband amplifier again.
Gating is selected, carried out respectively to wave band and transmit-receive switch between GSM-900RX, GSM-1800RX, GSM-1900RX, GSM-900TX, GSM-1800/1900TX and UMTSRX/TX, can strengthen the working time slot of power amplifier and the isolation between the non-communication time slot simultaneously.In addition, the GSM-900 in the circuit, the isolation that harmonic wave that GSM-1800 and GSM-1900 emission filter can suppress to launch and increasing receive.
Reference clock signal temperature compensation voltage-controlled (VTVCXO) crystal oscillator produces.This crystal oscillator provides the analog references clock signal of 19.2MHz for radio-frequency module, power module and baseband module.
Control subsystem realizes mainly that system power supply provides among Fig. 4, the conversion of subscriber phone interface circuit (SLIC), USB be to the transformation of RJ45 signal.By interface module, realize data function that user PC end is surfed the Net and the voice call function that passes through the external phone of RJ11.Wherein, processor controls (as arm processor) and access subsystem convert Ethernet RJ45 interface link layer protocol to the USB serial communication protocol by the usb signal interface, realize the data service of user side PC by the RJ45 online.The speech business of substation is changed by the SLIC interface.When incoming call, access subsystem is by controlling SLIC (Subscriber line interface circuit with the interface of control subsystem, Subscriber Line Interface Circuit) producing ring back tone notifies the user to receive calls, after the user answers, access subsystem is connected by pcm bus the caller voice signal with SLIC, SLIC realizes the voice bidirectional encoding and decoding between access subsystem and substation, realizes the speech communication function.
It mainly is by the DC/DC conversion module DC power supply of external input to be produced access module and the required power supply of control module by conversion that the system power supply of control subsystem provides, the big electric current demand when satisfying base band in the access subsystem and radio-frequency (RF) power amplification circuit working.
Fig. 5 shows the block diagram of the control subsystem 302 of BWA.As shown in Figure 5, in the embodiments of the invention, what the flush bonding processor of control subsystem 302 adopted is the ARM series processors.Control subsystem 302 is main, and the conversion of the providing of system power supplies, user interface circuit and the USB transformation to the RJ45 signal is provided.By control subsystem 302, realize data service function that user PC/ notebook is surfed the Net and the voice call function that passes through the external phone of RJ11.
In the flush bonding processor of control subsystem, comprise ethernet controller, and adopt network accelerator NAT (network address translation) to finish the conversion of network packet.The Ethernet drive circuit is connected with the baseband processor ethernet controller, and controlled by baseband processor.Major function meets the IEEE802.3/802.3u standard, comprises Physical Coding Sublayer, physical medium annex, twisted-pair feeder physical medium sublayer, 10base-T X coding/codec and twisted-pair feeder media access unit etc.
Wherein, user speech business realizing process may further comprise the steps: for the speech business of substation, control and change by the telephone user interface circuit.Telephone user interface module 502 provides a cover complete analog telephone interface, makes ordinary telephone set to use in mobile radio communication.When incoming call, the baseband processing module 3044 of wireless access subsystem 304 produces ring back tone by Serial Peripheral Interface (SPI) (SPI) control telephone user interface, and notifies the user to receive calls.After the user answers, the caller voice signal is connected with subscriber phone interface module 502 by pcm bus, the voice bidirectional encoding and decoding that subscriber phone interface 502 is realized between baseband module and substation realize the speech communication function.
DC/DC module 504 produces the required power supply of wireless access subsystem 304 and control subsystem 302 with external input power supply by conversion.
The description of above accompanying drawing shows the functional unit of BWA 200 in the embodiment of the invention, below in conjunction with each functional unit of system, the software configuration and the agreement realization flow of system of the present invention is described.
Fig. 6 shows the software architecture diagram according to BWA of the present invention.Control subsystem software is one of major advantage of the present invention in the BWA.Promptly, provide the bridge of a user and broadband mobile network access by a similar online agent software is provided for the PC/ notebook.PC/ notebook user does not need to install any software, as long as support general browser both can.The network interface card and the driver that are connected with system of the present invention can adopt existing matured product fully, do not need to consider reprogramming, by the operating system existing capability, can transparently browse data services such as download as online for the user realizes wireless data service.Application software is divided into user's face, chain of command and three software submodules of data surface.
Wherein, thin-skinned module of user mainly is meant general browser software, opens the network settings webpage that system of the present invention provides, and provides the user that the mobile network that will connect is carried out relative parameters setting, realizes the logic function partial content as described later.
The chain of command operating system nucleus adopts uClinux operating system.The chain of command function comprises Ethernet interface control, and middle IP bag routing forwarding reaches the controlled function to radio access module.
Because the wireless access subsystem is based on USB interface with being connected of control subsystem, therefore, provides the USB driving in the control subsystem, and this USB driving is invented serial ports carried out modem transfer of data and access control.Simultaneously, because based in the broadband access process, the unsupported function of many standard AT commands is arranged, in order not influence in the communication process, modem transfer of data and standard access control, control subsystem of the present invention has increased a virtual extended serial ports, and is mapped to same USB physical port, is used for the transmission of network control expansion AT command.
The functional sequence of chain of command is that the webpage that receives from the user place is analyzed, extract the network settings parameter, by the background process program, as CGI (CGI) application program, convert the network settings parameter to the AT order, send to radio access module by expansion serial port drive and USB physical port and carry out wireless access control.
Data surface: by correct network settings, and after having set up the network connection, application data on the PC/ notebook, be packaged into the IP packet, the IP that delivers in the control subsystem by Ethernet interface transmits routing module, by Modem standard serial port and USB physical port, be sent to the wireless access subsystem, and be forwarded on the Internet again by wireless access communication software.
Network configurator in the control subsystem adopts the C/S server or is provided with based on the WEB of http protocol.PC/ notebook side application software (browser) is by the higher layer applications order, mutual based on the Ethernet card interface conversion control module in ICP/IP protocol and the control subsystem, and Ethernet card interface conversion Control Software module is according to the corresponding command, analyze, explain, execution and transparent transmission, finish the user data service function, as being provided with and opening serial ports, set up functions such as network connection.
Fig. 7 is the RJ45-USB interface protocol transition diagram according to the BWA of the embodiment of the invention.As shown in Figure 7, show control subsystem software of the present invention and how to finish RJ45-USB agreement and interface conversion function.
Wherein, control subsystem software is by USB physical interface and wireless access subsystem, communicates based on the AT order of standard and expansion; Control subsystem is connected by the network interface of RJ45 interface and PC/ notebook computer.The software function of control subsystem comprises: the transmitting-receiving of AT order, data connect dialing, embedded web server page (provides the user by webpage the wireless access subsystem to be set, and then finish the setting that network connects), IP packet forwarding capability, the IP packet with the user after data connect foundation is forwarded to radio access module from subscriber computer.
Fig. 8 shows the flow chart according to broadband wireless access method of the present invention.As shown in Figure 8, this method may further comprise the steps:
Step S802, control subsystem directly or by WIFI wireless access subsystem receives input parameter from user terminal, and call the background process program input parameter is resolved input parameter is converted to the AT order, the AT order is sent to access subsystem; And
Step S804, access subsystem calls corresponding intrinsic function so that user terminal and external network connect or disconnect after the AT order that receives from control subsystem.
Wherein, control subsystem is being carried out data interaction between access subsystem and the user terminal or between access subsystem and WIFI wireless access subsystem after user terminal and external network connection.Access subsystem carries out data interaction between control subsystem and external network after user terminal and external network connection.WIFI wireless access subsystem carries out data interaction between control subsystem and user terminal after user terminal and external network connection.WIFI wireless access subsystem is supported the IEEE802.11b/g standard.
Fig. 9 shows the flow chart of broad band access method according to an embodiment of the invention.As shown in Figure 9, this method may further comprise the steps:
Step S902, user terminal is connected to BWA by interface;
Step S904, the access subsystem of initialization BWA and control subsystem;
Step S906, control subsystem is called the background process program according to the parameter of the user's input that receives, analytic parameter, and conversion generates the AT order;
Step S908, the access subsystem parsing is called relevant intrinsic function from the AT order that control subsystem receives, and carries out network settings, and sets up or the connection of disconnection network; And
Step S910, if set up the network connection, then the IP packet of user terminal sends to access subsystem, is forwarded on the network by access subsystem, carries out transfer of data.Interface is the RJ45 interface.
In said method, the step of initialization access subsystem may further comprise the steps: search net, registration and handle idle condition; The AT order that wait receives the control subsystem transmission connects or disconnection with Control Network; And, finish basic speech business in response to subscriber dialing or network phone calls.
In said method, the step of initialization control subsystem may further comprise the steps: the processor of initialization control subsystem and peripheral hardware; And starting the operating system, and Loading Control module.
Wherein, control module comprises: WEB gateway submodule, AT command analysis and generation submodule, IP packet forwarding module, serial communication submodule and USB driven element module.User terminal is personal computer or notebook computer.
According to the present invention, can realize following advantage: realized wireless network control and wireless access by two flush bonding processors; With data service and becoming one of speech business, reduce user cost; The PC side adopts Ethernet interface, adapts to the two-forty of broadband wireless mobile network; And the control subsystem of internal system and wireless access subsystem employing high speed USB bus, the two-forty of adaptation broadband wireless mobile network.
Therefore, a system according to the present invention can satisfy user speech and broadband data service simultaneously.The present invention has given full play to the characteristics that the 3G WiMAX inserts, and satisfies common PC terminal use to greatest extent, under the particularly scarcely populated geographical environment, enjoy abundant content and service whenever and wherever possible.The terminal use does not need to install any special device drives and application software, need not to be concerned about the ins and outs of equipment access carrier network yet.By the generic browser software in the PC, just can easily realize professional consistency and the uniformity of using.
Below, in conjunction with Fig. 5 and Fig. 7, the implementation procedure by user data service illustrates system and method for the present invention.
As shown in figure 10, show the process that is provided with according to broadband mobile network network of the present invention, it may further comprise the steps:
S1002 for system control subsystem distributes an implicit IP address, and is known to the user;
S1004 powers on system of the present invention, and the USIM/SIM card is inserted, and network registry is normal;
S1006, PC/ notebook user open any browser software, and input system control subsystem network address of the present invention, and foundation is connected with the HTTP of system of the present invention;
S1008, the HTTP request that the WEB gateway response PC/ notebook in the control subsystem sends, the webpage that will contain network settings and connection parameter returns to the user;
S1010, the user is provided with receiving the parameter in the network settings webpage, and submits to the webpage of finishing that is provided with to give control subsystem;
S1012, control subsystem is resolved the webpage of receiving, and calls intrinsic function, as the CGI function, the network settings parameter that includes in the webpage is converted into the AT order of standard or expansion;
S1014, control subsystem by with the USB serial ports of wireless access subsystem, send the relevant AT of network settings and order to the wireless access subsystem;
S1016, wireless access sub system analysis AT order, and call the setting that the network of relation setting program is finished wireless network;
S1018, the wireless access subsystem returns to control subsystem with the state of network settings and failure; And
S1020, the success of receiving according to control subsystem or the response message of failure are provided with.
Wherein, if the success would return newly-installed page that refreshes of user; If unsuccessful, then return parent page of user, allow the user be provided with again.
Aforesaid network settings parameter comprises user name, password, lands number, information such as DNS, APN.
In an embodiment of the present invention, setting up network, to connect, disconnect function operations process such as network connection, network selecting and above-mentioned steps and process similar.
After successfully having set up the network connection, application layer the when user surfs the Net or http protocol message and data are sent to control subsystem after sealing by ICP/IP protocol.Control subsystem is after receiving the IP bag, do not carry out any judgement, directly this IP bag is packaged into the PPP frame format again, pass through the wireless access subsystem by USB interface, and be forwarded on the Internet, thereby finish user's Internet data business by the wireless access subsystem.Thereby in the process of user's online, just answer simultaneously by telephone calling or incoming call by the wireless access subsystem for the user.
Embodiments of the invention get off to be described at the WCDMA/HSDPA/GSM network environment, but based on System and method for of the present invention, can be applied to other 3G network fully, as in the 3G (Third Generation) Moblie networks such as CDMA 2000, TD-CDMA.
According to the present invention, can realize following advantage: realized wireless network control and wireless access by two flush bonding processors; With data service and becoming one of speech business, reduce user cost; The PC side adopts Ethernet interface, adapts to the two-forty of broadband wireless mobile network; And the control subsystem of internal system and wireless access subsystem employing high speed USB bus, the two-forty of adaptation broadband wireless mobile network.
Therefore, a system according to the present invention can satisfy user speech and broadband data service simultaneously.The present invention has given full play to the characteristics that the 3G WiMAX inserts, and satisfies common PC terminal use to greatest extent, under the particularly scarcely populated geographical environment, enjoy abundant content and service whenever and wherever possible.The terminal use does not need to install any special device drives and application software, need not to be concerned about the ins and outs of equipment access carrier network yet.By the generic browser software in the PC, just can easily realize professional consistency and the uniformity of using.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a BWA is characterized in that, comprising:
Control subsystem, be connected to access subsystem, and be connected directly to user terminal and/or be connected to WIFI wireless access subsystem and then be connected to described user terminal by Ethernet interface, be used for directly or receive input parameter, call the background process program described input parameter converted to the AT order and to send it to described access subsystem from described user terminal by described WIFI wireless access subsystem;
Described access subsystem is wirelessly connected to external network, is used to receive the described AT order from described control subsystem, and the respective inner function is resolved and called to described AT order so that described user terminal and described external network connect or disconnect; And
Described WIFI wireless access subsystem is wirelessly connected to described user terminal, is used to receive from the described input parameter of described user terminal and sends it to described control subsystem.
2. according to the BWA of claim 1, it is characterized in that, described control subsystem, also be used for after described user terminal and the connection of described external network, carrying out data interaction between described access subsystem and the described user terminal or between described access subsystem and described WIFI wireless access subsystem.
3. according to the BWA of claim 1, it is characterized in that described access subsystem also is used for carrying out data interaction between described control subsystem and described external network after described user terminal and the connection of described external network.
4. according to the BWA of claim 1, it is characterized in that described WIFI wireless access subsystem also is used for carrying out data interaction between described control subsystem and described user terminal after described user terminal and the connection of described external network.
5. according to each broadband wireless access subsystem in the claim 1 to 4, it is characterized in that described WIFI wireless access subsystem is supported the IEEE802.11b/g standard.
6. according to each BWA in the claim 1 to 4, it is characterized in that described control subsystem is connected to described access subsystem by USB interface.
7. according to each BWA in the claim 1 to 4, it is characterized in that, user terminal comprises first external equipment and second external equipment, and wherein, first external equipment comprises at least a in the following equipment: personal computer, notebook computer, personal digital assistant; And
Second external equipment comprises the communication equipment of supporting the RJ11 interface.
8. according to each BWA in the claim 1 to 4, it is characterized in that described control subsystem comprises:
Interface module is connected to described user terminal and first processor respectively, is used to receive the described input parameter from described user terminal, and described input parameter is sent to described first processor; And
Described first processor, be connected to described access subsystem by USB interface, be used for after the described input parameter that receives from described interface module, call described background process program described input parameter converted to described AT order and to send it to described access subsystem.
9. according to each BWA in the claim 1 to 4, it is characterized in that interface module comprises:
Ethernet interface is connected to first external equipment by the RJ45 interface, is used for carrying out data interaction between described first processor and described first external equipment; And
Telephone user interface is connected to second external equipment by the RJ11 interface, is used for carrying out data interaction between described first processor and described second external equipment.
10. according to each BWA in the claim 1 to 4, it is characterized in that described access subsystem comprises:
Baseband module is used to receive the described AT order from described control subsystem, and the respective inner function is resolved and called to described AT order so that described user terminal and described external network connect or disconnect; And
Described radio-frequency module is connected to baseband module, and is wirelessly connected to described external network, is used for carrying out data interaction with external network.
11. according to each BWA in the claim 1 to 4, it is characterized in that, described baseband module is to handling accordingly from the data of radio-frequency module and first processor respectively, and described processing comprises following at least a operation: modulation uplink and downlink eat dishes without rice or wine signal, channel coding/decoding, encrypt/decrypt, audio coding decoding, coding and decoding video, analog/digital conversion and digital-to-analog conversion.
12. a broadband wireless access method is characterized in that, may further comprise the steps:
Step S802, described control subsystem directly or by described WIFI wireless access subsystem receives described input parameter from described user terminal, and call the background process program described input parameter is resolved described input parameter is converted to described AT order, described AT order is sent to access subsystem; And
Step S804, described access subsystem calls corresponding intrinsic function so that described user terminal and external network connect or disconnect after the described AT order that receives from described control subsystem.
13. broadband wireless access method according to claim 12, it is characterized in that, described control subsystem is being carried out data interaction between described access subsystem and the described user terminal or between described access subsystem and described WIFI wireless access subsystem after described user terminal and the connection of described external network.
14. the broadband wireless access method according to claim 12 is characterized in that, described access subsystem carries out data interaction between described control subsystem and described external network after described user terminal and the connection of described external network.
15. the broadband wireless access method according to claim 12 is characterized in that, described WIFI wireless access subsystem carries out data interaction between described control subsystem and described user terminal after described user terminal and the connection of described external network.
16., it is characterized in that described WIFI wireless access subsystem is supported the IEEE802.11b/g standard according to each broadband wireless access method in the claim 12 to 15.
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