CN1805473A - Wireless network interface setting method and apparatus for network media telephone - Google Patents
Wireless network interface setting method and apparatus for network media telephone Download PDFInfo
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Abstract
The invention relates to a method for setting the wireless network interface of network media telephone terminal and relative device. The invention uses the network media telephone terminal as the base of wireless network interface, while the network media telephone terminal has a IP telephone module for projecting the target called number into relative gateway IP address; the terminal has a PCI bus, a CPU, a multimedia processing module supporting the flow media for processing MPEG2-4 decoding, video/acoustic coding and A/D conversion on the PCI bus. Said multimedia processing module comprises a voice/multimedia processor and a DSP processing module; the PCI bus comprises a wireless network adapting interface module or a wireless adapting interface module and a wide field or local field connection module. The invention uses the adapting interface module relative to the character of interface of wireless network access device, as the network extended adapting interface module of network media telephone terminal, while said wireless network adapting interface module is connected to the system bus inside the network media telephone terminal.
Description
Technical field
The present invention relates to a kind of method to set up and system and device of radio network interface of network media phone set terminal, especially the wireless communication peripheral hardware adaptable interface module that has dsp processor by employing becomes network media phone set terminal and supports indoor wireless interconnecting terminal, the fixed broadband wireless network terminal and mobile network communication media termination.Relate to network media phone set terminal and can expand the application function of multiple wireless network environment by the wireless communication external equipment.
Background technology
Such trend is being followed in the development of communication network at present, promptly by the integrated services network evolution of traditional single service network towards voice transfer towards the data-oriented of a new generation, voice, video.Traditional voice communication network is to set up on the basis of telephone network, though having experienced digitlization for many years improves, DDN (DigitalData Network) technology that the data-oriented transmission occurred, B-ISDN technology and digital access technology at a high speed towards integrated service, but the architectural feature of whole network does not still change, its exchanged form is still based on circuit switching, and its complicated signaling system makes the network control high concentrationization, lack flexibility, these features comprise that for realizing data, multimedia messages all are adverse factors interior integrated service.In order to address this problem, industry has proposed the notion of next generation network (NGN:NextGeneration Network), its core concept is business-driven, and promptly medium separate with transmission, and transmission separates with control, it does not also require and realizes television network on the physical layer, the combination of telecommunications network and computer network, but on high-level business, realize three fusions of netting, be voice, data, miscellaneous services such as video provide a unified and open platform in three online transmission.In this case, new network architecture requires further to simplify the unification of the controlled function of network with implementation platform, and this just requires the intellectuality of terminal, to replace traditional dumb terminal that comprises voice call, TV.
Along with developing rapidly of WLAN, the mode that comprises the multiple classes of wireless technology such as 802.11 Wireless LAN communication systems, WLAN communication means are provided and many standards coexists, especially relate to and on the ISM of 2.4GHz frequency band, support the multi-mode hardware of WLAN and wireless PAN standard also can realize voice, data, miscellaneous services such as video are in three online transmission.
CN200420078125.8 and CN200410041512.8 disclose a kind of network media phone set terminal and its application communication method, this terminal is the communication communication media with the network, be provided with the IP phone module that the target called number is mapped as corresponding gateway ip address, complete machine is provided with pci bus, host CPU, on pci bus, be provided with Ethernet interface, with the MPEG-4 decoding of supporting Streaming Media, video encoding is handled, the multimedia processing module of A/D conversion, described multimedia processing module comprises voice/multimedia processor and DSP processing module, connect phone and vision signal media port at described voice/multimedia processor by the D/A conversion, realization I/O communication under host CPU hardware and operating system software coordination communicates on the basis of SIP communications protocol and MPEG-4 stream media format.Support INTERNET roaming and the same account PSTN of PSTN access roaming; Have the phone function: wireless adaptation is supported video telephone; Multimedia function: online support television set, sound equipment etc.Intelligentized terminal---network media phone set terminal has the strong calculation and processing ability, can finish the various communication protocols of application.Intelligentized communication terminal is compared with traditional terminal, and the many of complexity are all wanted in the design of its software and hardware structure.Network media phone set terminal except needs possess multiple services transfer capability, also need possess the variation of access means as the ustomer premises access equipment of access network Call Center Platform.Under the situation that wireless access is popularized day by day, consider that wireless access is its worth improvements.
If network media phone set terminal has possessed the function that wireless network inserts, telco provider just can provide professional for the user apace in the scope of wireless coverage so, save the investment of line attachment, shorten the time of service fulfillment, also make the unified management of network extend to user side.
How fast, effective, flexible, low cost provides the needed miscellaneous service of client to become the problem of telco provider's overriding concern.And wireless access way has satisfied these needs of telco provider to a certain extent.Along with IP network becomes the development of the facilities network and the integration of three networks, the Internet is beginning to develop to the wireless network direction in the cable broadband development.Communication is the access way the most flexibly of communication network, and the technological incorporation of data communication industry and wireless communication industry is the key point of communicating by letter of final realization " Any to Any ".The evolution of wireless communication industry has been accelerated in the development of the Internet and data communication industry, makes wireless communication industry can better satisfy the demand that data business (mainly being IP operation) is increased fast technically.At present, the wireless network data technology of main flow comprises:
1, GSM/GPRS access technology: GSM is a kind of mobile communication technology standard that originates from Europe, is second generation mobile communication technology.This technology is a kind of common technique representative of present personal communication.Its usefulness be narrow band TDMA, allow a radio frequency promptly ' 8 groups of conversations of honeycomb ' carry out simultaneously.GSM began to come into operation in 1991.To the end of the year 1997,, become Europe and the actual standard in Asia more than 100 country's operations.The GSM digital network has stronger confidentiality and anti-interference, sound clarity, and conversation is stable, and it is big to possess capacity, frequency resource utilance height, advantage such as interface is open, and is powerful.China introduces in early 1990s and adopts this technical standard, is to adopt cellular analog mobile technology, i.e. first generation GSM technology (December 31 calendar year 2001, China closed the simulation mobile network) before this always.At present, China Mobile, CHINAUNICOM respectively have a GSM net, and the GSM mobile handset total number of users is mobile communications network the biggest in the world more than 1.4 hundred million.GPRS is a packet-switch technology.Owing to used the technology of ＂ grouping ＂, downloaded data and converse and to carry out simultaneously.Ten fens economic ＂ of ＂ of development GPRS technology get final product because it only need be upgraded to existing GSM network.The purposes of GPRS is very extensive, comprises by mobile phone sending and the reception Email, browses on the internet etc.
The sharpest edges of GPRS are: the non-WAP of its data transmission bauds can compare.The data transmission bauds of present GSM mobile radio communication is a per second 9.6K byte, and GPRS has reached 115Kbps, and this speed is the twice of 56Kmodem ideal rate commonly used.Except the advantage on the speed, GPRS also has ' always online ' characteristics, promptly the user keeps in touch with network at any time.
2, CDMA access technology: CDMA ＂ CDMA group data transmission technology ＂ is called as the 2.5th third-generation mobile communication technology.The CDMA mobile phone have speech clear, be difficult for call drop, transmitting power is low and characteristics such as strong security, transmitting power has only 1/60 of GSM mobile handset transmitting power, is called as the green mobile phone ＂ of ＂.What is more important makes that based on the CDMA of broadband technology Video Applications becomes possibility in the mobile communication.CDMA distributes a definite frequency for each caller, but whole frequency spectrums that each channel use can be provided.Therefore, the CDMA digital network has following advantage: band efficiency and bigger network capacity, network ruleization, speech quality height, confidentiality and the signal of simplification cover efficiently, are difficult for call drop etc.In addition, cdma system employing coding techniques, its coding has 4.4 hundred million kinds of arrays, and the coding of every mobile phone also changes at any time, and this makes that stealing sign indicating number can only become theoretic possibility.
The WCDMA technology can have been brought the message transmission rate of the highest 2Mbit/s for the user, and under such condition, any medium of using in the computer can both transmit easily by wireless network now.The advantage of WCDMA is, the spreading rate height, the reception and the transmit diversity in frequency selectivity diversity and space have been effectively utilized, can solve multi-path problem and fading problem, compare the mobile communication technology of the second generation, WCDMA have bigger power system capacity, more excellent speech quality, higher spectrum efficiency, faster data speed, stronger anti-fading ability, better anti-multipath, by effectively utilizing broadband, can not only handle sound, pictorial data smoothly, be connected fast with the Internet; WCDMA and MPEG-4 technology combine and can also handle real dynamic image in addition.
3, CDPD access technology
The characteristics of CDPD access technology maximum are exactly that transmission speed is fast, and the highest communication speed can reach 19.2kbps.In addition, aspect safety of data, owing to adopted the RC4 encryption technology, so fail safe is higher relatively; Forward and reverse channel key is asymmetric, and key is grasped by switching center, and portable terminal is logined once, and the key that the old key of switching center's automatic checking more renews is once carried out dynamic management.In addition, because cdpd system is based on the open system of TCP/IP, so we can insert Internet easily, and all application software based on ICP/IP protocol can need not to revise direct use; Applied software development is easy; The communication of mobile terminal numbering is directly used the IP address.Cdpd system can interconnect with public cable data network.
4, fixed broadband wireless inserts (MMDS/LMDS) technology
BWA can be divided into MMDS (Multi-channel Multi-pointDistribution Service) and LMDS (Local Multi-point Distribution Service) two big series by the difference of using frequency range, and Chinese implication is Local Multipoint Distribution System.This is a kind of broadband technology of microwave, is called the wireless optical fiber ＂ of ＂ technology again.It can realize broadband business such as transmitted in both directions speech, data image, video, video conferencing in nearer distance, and supports ATM, TCP
22Standard such as IP and MPEG2.Adopt a kind of service area structure of similar honeycomb, providing professional regional classification with needs is some service areas, establishes the base station in each service area, and base station equipment is communicated by letter with the user side in the service area through the point to multi-point wireless link.Each service area coverage is several kilometers to tens kilometers, and can be overlapped.Because NMDS/LMDS has the more characteristics of high bandwidth and bidirectional data transfers, multiple broadband interactive data and multimedia service can be provided, overcome the bottleneck of traditional local loop, satisfying the user to high-speed data and the growing demand of Image Communication, therefore is to solve the sharp weapon that communication network inserts problem.
5, Bluetooth technology: the English name of bluetooth is ＂ Bluetooth ＂, and in fact it is a kind of agreement that realizes wireless connections between the plurality of devices.By this agreement related computer peripheral hardware and the Hub of family etc. are comprised between numerous equipment of the RF of family and carry out information exchange.Bluetooth applications links to each other in mobile phone and computer, can save cell-phone fee usefulness, realizes data sharing, internet access, wireless hands-free, data, image transmission etc. synchronously.Bluetooth has the data exchange capability of a pair of multiple spot, and basic communication speed is 750kbits/s, but very general with the product of 4Mbits/s IR port now, and the wireless adaptation of 16Mbits/s also goes through recently.
6, Home RF technology: Home RF is mainly the home network design, is intended to reduce the speech data cost.In order to realize the high efficiency of transmission to packet, Home RF has adopted the CSMA in the IEEE802.11 standard
22The CA pattern is obtained control to channel in the mode of competition, can only have an access point to transmit data on a time point in network.HomeR F provides the support truly of convection current business (StreamMedia).Stipulate high level priority and adopted the retransmission mechanism that has priority owing to the convection current business, so just guaranteed professional required bandwidth of real-time stream and low interference, low bit error.HomeRF is operated in the 2.4GHz frequency range and adopts digital frequency hop spread spectrum, and speed is that to have 75 bandwidth be the 1MHz frequency hopping channel to 50 jumping/s.Modulation system is the FSK modulation of constant envelope, is divided into two kinds of 2FSK and 4FSK.Adopt frequency modulation to modulate the interference and the decline that can suppress effectively under the wireless environment.Under the 2FSK mode, the transmission rate of maximum data is 1Mb/s; Under the 4FSK mode, speed can reach 2Mb/s.Among the latest edition Home RF2.x, adopted WBFH (widebandfrequencyhopping) technology to increase the frequency hopping bandwidth, be increased to 3MHz, 5MHz from original 1MHz, the speed of frequency hopping also is increased to 75 and jumps 22s, its data peaks is also up to 10Mb/s, near the 11Mb/s of .IEEE802. 11b standard, can satisfy following family's broadband connections substantially.
7, WLAN (wireless local area network): WLAN (wireless local area network) wireless LAN, be called for short WLAN
It is the product that computer network combines with wireless communication technology.It is not fettered by cable, and is removable, can solve the problem of bringing because of wired network difficult wiring etc., and networking flexibility, and dilatation is convenient, with the multiple network operating such, advantage such as is widely used.WLAN both can satisfy the networking requirement of all kinds of portable machines, also can realize multiple functions such as the access of LAN (Local Area Network) far-end, fax, Email.
8, the 3G communication technology
3G is the common name of 3-G (Generation Three mobile communication system).Compare with existing mobile voice network technology, the major advantage of 3G technology is to utilize advanced air interface technologies (comprising the efficient utilization to frequency spectrum), the comprehensive IP packet switch of core net and control technology, can greatly increase power system capacity, improve the end-to-end communication quality and more high data rate is provided, comprise and realize real-time voice video, high-speed multimedia and mobile Internet visit and related service.Speed is 384kbps during outdoor static or walking, and indoor be 2Mbps.But these requirements also do not mean that user's admissible rate just can reach 2Mbps, because indoor speed also will depend on the tightness degree that frequency planning detailed in the building and tissue are cooperated with operator.The core network of 3G will meet the trend of the times of the network integration in the evolution to complete IP network evolution.
No matter which kind of wireless access technology standard telco provider selects, their core network CN can be shared to a large extent, and will be towards direction evolution and the development towards all-IP: the carrying of form of services such as network media phone set terminal voice, data, multimedia is based on IP's; Network media phone set terminal service call model end to end is based on IP's; Network media phone set terminal and the networking of network call center platform device, the professional transmission are based on IP's; The network exchange of core and call control signalling also will be based on IP's; The all-network of network-oriented medium phone set terminal system development is used and also is based on IP's.And from user's application point of view: the terminal use also is indifferent to the wireless network air interface technologies type that the utilization merchant is adopted, but can do which type of application with network media phone set terminal by wireless network, so from class of business and application point of view, final network media phone set terminal system can be regarded as a cover adopt network (comprising wireless network) insert means, IP-based multimedia application system end to end.
But CN01219806 discloses a kind of wireless communication terminal and subsidiary communications terminal of internet access: above-mentioned terminal all comprises microprocessor, memory and the wave point and the wireless transmitter that are used to carry out radio communication, and PC interface and network interface that wireless communication terminal also comprises, it can be communicated with PC with computer network, during use the subsidiary communications terminal is embedded in the controlled plant, the intelligent wireless information network of forming electric equipment, control ability to electric equipment is stronger like this, be subjected to the influence of environment less, be convenient to concentrating and remote monitoring of equipment.
CN02140673 discloses a kind of portable data assistance: comprise the input panel that has data input unit and the back side that is positioned at above-mentioned input panel opposite location.Wireless communication module with radio communication function can be installed thereon, and, by with the wireless communication module slot configuration at the above-mentioned back side as far as possible away from the position of above-mentioned input panel direction, thereby can suppress to be installed in wireless module on the wireless module slot with the deterioration of the transmitting-receiving efficient of antenna electric wave.
The scheme cost and price of above-mentioned similar set-top box all is unfavorable for the family expenses that enter popularized, and also limited more aspect the operation value-added service.
Technical scheme
The object of the invention provides a kind of method to set up and system and device of radio network interface of network media phone set terminal, comprise CN200410041512.8 is disclosed a kind of network media phone set terminal and its Application Expansion and improvement, a kind of functional network medium phone set terminal that wireless network inserts that possessed is provided, possess multiple services transfer capability, possess the variation of access means.Telecommunications or content service provider just can be apace for the user provide professional in the scope of wireless coverage, and the investment of saving line attachment, also makes the unified management of network extend to user side at the time of shortening service fulfillment.
The object of the present invention is to provide a kind of multistandard wireless drive networks medium phone set terminal that is applicable to, can be provided with software and device that multistandard wireless drives.To the Network adaptation interface module of the general interface of wireless network access communications equipment, make being connected of the support of network media phone set terminal and wireless network transceiver terminal by design and configuration pin.Network media phone set terminal is general by design, the Network adaptation interface module of seriation, makes network media phone set terminal expand the application function of multiple wireless network environment by the wireless communication peripheral hardware.
The present invention also aims to provide a kind of cost and price to be suitable for popularizing and entering family expenses, and carrying out a wide application space aspect the operation value-added service.
The present invention also aims to Ethernet and radio communication are combined, especially with bluetooth, GSM/GPRS, existing mobile phone terminal such as CDMA carries out sufficient the combination with network media phone set terminal.Give full play to the superiority of the two, can improve the range of application and the reliability of network media phone set terminal greatly.
Technical scheme of the present invention is: the method to set up of the radio network interface of network media phone set terminal, with network media phone set terminal as the basis of radio network interface, network media phone set terminal is provided with the IP phone module that the target called number is mapped as corresponding gateway ip address, the terminal complete machine is provided with pci bus, CPU, on pci bus, decode with the MPEG2-4 that supports Streaming Media, video encoding is handled, the multimedia processing module of A/D conversion, described multimedia processing module comprises voice/multimedia processor and DSP processing module, connect phone and audio-video signal media port at described voice/multimedia processor by the D/A conversion, it is characterized in that pci bus is provided with wireless network adaptable interface module or wireless adaptation interface module and local or wide area link block, employing is at the adaptable interface module of the wireless network access device interface characteristics extension of network adaptable interface module as network media phone set terminal, and described wireless network adaptable interface module is connected with the system bus of network media phone set terminal inside.
The wireless network applied environment of described adaptable interface module reply network media phone set terminal, adopt the functional interface agreement and the corresponding design of seriation, the support of wireless network adaptable interface module is supported its service application by serial wireless network peripheral hardware access network medium phone set terminal;
The adaptable interface module adopts general embedded interface, support communication means between processor in conjunction with adopting multiport memory, integrated by system bus and network media phone set terminal, after the startup, the adaptable interface module is finished initialization and data transmit-receive unloading task automatically under software-driven.The adaptable interface module board is made and is adopted the Electromagnetic Compatibility design.
But it also is a kind of mode that the adaptable interface module does not adopt general embedded interface, the CPU of available network medium phone set terminal supports, supports radio access module PC CARD (PCMCIA) access module (module that the comprises expansion) work of multi-protocols by system bus (as pci bus).Radio access module also comprises many moneys radio communication trunk module.
The device of the radio network interface of network media phone set terminal: described adaptable interface module is as the extension of network interface module of network media phone set terminal, the adaptable interface module comprises main control module and access module, and is connected with the internal system bus relevant position of network media phone set terminal; Access module adopts PC CARD (PCMCIA) access module, and network media phone set terminal is provided with the pc card slot of PCMCIA wireless adaptation interface module.Can make network media phone set terminal pass through the PIN-68 interface through wireless NIC access of radio network;
The wireless adaptation interface module comprises main control module and comprises the USB2.0 access module, can make network media phone set terminal by being connected access of radio network with wireless receiving and dispatching peripheral hardware RNT; The adaptable interface module comprises main control module and comprises bluetooth (Bluetooth) access module, cooperates the mobile phone (MT) that has bluetooth (Bluetooth) communication function, can make network media phone set terminal insert 2.5G-3G radio data network.
Network media phone set terminal is by standard RJ-45 Network Interface Module in inserting and the serial wireless network MCU adaptable interface module of configuration, being convenient to network media phone set terminal is connected with the compatibility of radio communication peripheral hardware under different networks applied environments such as indoor, local area network (LAN), wide area network, mobile network, and, enter IP core network by the radio communication peripheral hardware.
The present invention can be applicable to the access of network media phone set terminal at multiple wireless access network environment, adopt network media phone set terminal behind the said structure have applied widely, the speed that continues is fast, networking flexibility, dilatation convenient with and low cost and other advantages.This terminal is the communication communication media with the network.Network media phone set terminal except needs possess multiple services transfer capability, also need possess the variation of access means as the ustomer premises access equipment of access network Call Center Platform.
Network media phone set terminal adopts embedded real-time multi-task operating system, and the IP based network access technology is followed the Ethernet ICP/IP protocol, can support IPv4 and IPv6, and supports to meet the multimedia communication service of SIP standard.This terminal possesses very strong flexibility and extension of network, can support communication network technology and following novel Multimedia session agreement.Technological frame analysis from network media phone set terminal: on hardware systems: network media phone set terminal equipment has core processor (CPU), memory (Memory), ancillary equipment and network communications capability, is equivalent to ultramicroscopic computer equipment.
On software architecture: embedded OS operates on the hardware of network media phone set terminal equipment, and using to the user provides basic functions such as task scheduling, equipment control, internal memory and other resource allocations.Adopt the general-purpose built-in type operating system of main flow: Windows CE series (containing Pocket PC) or built-in Linux.The solution employing of network interface is existing to be connected with ancillary equipment by general bus.
The interface of network media phone set terminal generally is meant the adapter circuit between mainboard and certain the class peripheral hardware, and its function is to solve the matching problem on electric pressure, signal form and speed between mainboard and the peripheral hardware.Therefore adaptive dissimilar peripheral hardware needs different interfaces, and these interfaces can be that part is general.Storage system, telephone handle, audio ﹠ video equipment and input equipment then are the elements of network media phone set terminal system, and their realization depends primarily on user's demand, applied environment, factors such as development cost and cycle.Network media phone set terminal interface can customize fully, can adopt general high-performance can expand the interface module of adaption function.Because the network media phone set terminal of dsp chip solution is integrated CPU, demultiplexing, audio frequency and video separate, modules such as X-Y scheme processing, coding and peripheral port.For saving chip area, these independent sectors link together by bus mode.Be to improve the performance of system, normally set about, thereby improve the interaction process ability of system on the whole from aspects such as the speed that improves CPU, the disposal ability that strengthens two dimension and even 3-D graphic, the interface number that increases peripheral port and types.
Environmental condition and service application demand at wireless network: the access of wireless network can be passed through wireless Hub, radio access station (Access Point on Basic Ethernet, RNT, the also logical device of translations network bridge), wireless bridge, wireless Modem and wireless network card wait and realize.Wireless device communication manufacturer also provides many moneys radio communication trunk module for supporting use except producing the general-purpose interface wireless network card usually at present.
Under the situation that does not change whole hardware configuration of network media phone set terminal and adaptive machine external bus (Peripheral Bus-peripheral bus), can reach the support that wireless network is inserted by upgrading to embedded software.On the hardware, network media phone set terminal requires miniaturization, high reliability.Integrated adaptation network interface module at the radio communication peripheral hardware in network media phone set terminal adopts application-specific integrated circuit (ASIC).In design process, also need consider the inhibition and the electromagnetic Compatibility Design of electromagnetic interference simultaneously.
Machine external bus with network media phone set terminal of wireless network interface modules: refer to the bus with external apparatus interface, be actually a kind of interface standard of peripheral hardware.Popular radio communication Peripheral Interface standard has at present: three kinds of RJ-45, USB and PCMCIA.Preceding two kinds is the equipment interface of radio communication trunk module, and a kind of novel external bus in back can be used for connecting the general-purpose interface wireless network card.Network media phone set terminal is independently to communicate with the Wireless Telecom Equipment that meets serial wireless communication protocol based on the basic function of the Network adaptation interface module of machine internal bus agreement.Its hardware circuit of Network adaptation interface module comprises and the communication interface of network media phone set terminal system bus, the hardware interface with the peripheral hardware wireless communication controller, the parts such as interface of machine external bus Data Buffer Memory.
Interface can also adopt multiport memory to support communication between processor, with the simple SRAM interface of industrywide standard to the transfer of data between the baseband processor, integrated memory and control logic, the shared central memory of access simultaneously.Each port has independently control, address and I/O pin, therefore can realize independent, the asynchronous read and write operation of any position in the memory.UART drives, and by the direct programming to the master control module controls register, realizes the detection of transmission, radio communication peripheral hardware answer signal and the operating state of AT order.
Characteristics of the present invention are: this is to have possessed the functional network medium phone set terminal that wireless network inserts, and possesses multiple services transfer capability, possesses the variation of access means.Make the unified management of network extend to user side.Be applicable to the multistandard wireless driver, network media phone set terminal can be supported and being connected of wireless network transceiver terminal.Network media phone set terminal is general by design, the Network adaptation interface module of seriation, makes network media phone set terminal expand the application function of multiple wireless network environment by the wireless communication peripheral hardware.
Because wireless communication ability comprises multiple wireless access means, as wireless lan (wlan), bluetooth, GSM/GPRS, CDMA and following 3G network.Wireless network inserts and can use wireless channel to substitute common wire message way by physical layer interface, and above each layer of physical layer is constant.The great advantage of making like this is that the network operating system and the corresponding driving program on upper strata can not made any modification.Wireless network also inserts from data link layer.This interface method is not continued to use the MCA agreement of cable LAN, and adopts the MAC agreement that is more suitable for the wireless transmission environment.When realizing, the MAC layer and and be transparent with lower floor to the upper strata, configuration corresponding driving program is finished the interface on upper strata, territory, can guarantee that so existing wired network operating system or application software can run well at wireless local on the net.
At present, the wireless network communications system transceiver that major part wireless mobile communication device manufacturer provides is except adopting the data link layer interface method, also adopted the standard interface technology, its objective is modular structure design for the ease of the terminal applies system, the extensive support of different networks technical standard be can obtain, compatible with it wireless communication external equipment and software also are convenient to produce.
Network media phone set terminal increases the adaptable interface at different wireless communication peripheral hardware MCU: the radio communication transceiver terminal equipment by different radio technology and consensus standard, just can insert different wireless networks.Network interface can be chosen in the physical layer or the data link layer of OSI Reference Model.
Meaning of the present invention also is: propose ITU-T from the notion of NGN the feature of NGN is built consensus, the understanding that has reflected the business model innovation ability that Telecoms may bring for packet switching (IP) technology is in continuous intensification.For under the technology of unified and stable core bearer network by diversified access network support business open, customization, be the condition of necessity professional and separating of carrying.But,, must set up one and insert irrelevant, independent of service, the irrelevant distributed manageable user-network interface environment of application in order under the environment that separates, to support open, manageable business.Network media phone set terminal Network adaptation interface is by the analysis to radio network technique and demand, proposed a kind of to support that the MCU interface is a target, based on wireless mesh business infrastructure architecture, be based upon on the service convergence platform, carry the network media phone set terminal Network adaptation interface module scheme that convergent point, accesses network customer service convergent point, radio local network business integration point and service convergence platform are formed by a series of access service convergent points, accesses network user.
At the design of network media phone set terminal, Virtual network operator and user may require the application of number of different types.Except the cable network access of standard, the user also needs to adapt to the solution that wireless network inserts the environment correspondence.Use as extension of network, network media phone set terminal all provides the ability of three aspects: abundant and comprehensive multimedia is experienced, is passed through television user interface (UI) and realizes best web browsing experience and extendible application and service (to strengthen user experience).These application comprise: the multimedia function that inserts by wireless network, senior function of browse, abundant function of application and the service of software formula, personal video recording device (PVR).Video request program (VOD).Electronic program guides (EPG).Email/Internet visit.The program function of ecommerce, enhancing.Voice over IP (VoIP) and instant messages (IM).
Network media phone set terminal is by wireless network environment update service intelligently.In order to guarantee positive investment repayment, when on-premise network medium phone set terminal, its interface must be easy to use when upgrading network environment.By upgrading network, can improve maintenance efficiency and enhancement user's satisfaction.Owing to can constantly refresh Network Interface Unit by interface, therefore, equipment can not be eliminated rapidly, and the user also can obtain the latest network applied environment.
Wireless communication module in the past can only cooperate the Network application terminal to constitute a whole set of comprehensive solution, and this is a large and complete system often, and price is also relatively more expensive.Wireless communication module can't break away from terminal system independently to be selected to use, and this also makes the service terminal of wireless network be limited by the restriction of ad hoc wireless networks to using.But along with progressively applying of multiple wireless network standards, the consumption demand of vast ordinary consumer begins to promote, wireless communication module must all become simple installing, safeguard, using, and, will be no longer dependent on the terminal traffic application system and self-organizing system.Present most of radio network product all is split into very pure autonomous device and uses for wireless networking.The appearance of this trend will thoroughly be done big wireless network terminal market and cause a revolution.
The development track of wireless network meets the idealized model of current development of new techniques and promptly competes preceding cooperation.Increasing network application requires to increase wireless connections to its corresponding terminal equipment, and the quick deployment and the low-cost solution that progressively manifest wireless technology are desirable.Wireless network is not only the cable replacement product, and its scope of application not only is confined to industrial monitoring and cell phone, and wireless mobile communication device (transceiver) has been connected to the plurality of devices from PC to the Network terminal more and more.The realization and the standard that need overcome wireless network protocol certainly are inconsistent, make the interoperability and the interoperability between the software and hardware of interoperability, software of hardware not good.And software development also needs for wireless application provides total solution cross-platform transplanting.
Because market mechanism requires communication to carry out more value-added service, China's wireless network also just develops to multiple business from single voice service.The product of technological progress is not only in the appearance of new business, and becomes competition and value-added new tool.Appearance from voice, data to multimedia service, the competition that is growing more intense impels the paces of technological innovation constantly to accelerate conversely.On the network platform of packetizing, open and unified IP uses and can satisfy the requirement of user to characteristics such as easy-to-use, portable, low costs well, and this is the most attractive selection at present beyond doubt.Network media phone set terminal based on IP-based switching's standard is a desirable development model of fixed network terminal upgrading.Network media phone set terminal of the present invention has the characteristics of " application drives ", with regard to the existing market situation, according to preceding surface analysis,, can certainly wide application prospect arranged if can connect based on cheap wireless data communication system at a high speed by the Network adaptation interface is convenient.
Therefore, in original network media phone set terminal system, increase new Network adaptation interface module simply, when being inserted, the existing cable network of network media phone set terminal support support wireless network to insert, after wireless interface technology is used, Virtual network operator can be according to the market demand, selectively in some areas at network media phone set terminal, utilize its network wireless adaptable interface module, dispose suitable wireless network and insert support equipment,, just can make the user be familiar with the business of the third generation gradually by less input, present and following main business of guiding customer acceptance, and then by wireless network extending user group.By the several years effort, during to construction third generation mobile radio system, the user is enough to make network media phone set terminal system business and application upgrade to become quite level and smooth to the familiar and degree of recognition of business.The development of " cordless communication network ", in the service application of the network media phone set terminal that finally implements to, meet advocated at present 3G and 3C application etc. further is extended in the wider family space, will present brand-new family's digital communication and entertainment mode.Implement the associated application of wireless access network from the Network adaptation interface, will make the commercialization of network media phone set terminal wireless network associated application, thereby form the advantage that interconnects with pattern cheaply.
Present stage wireless terminal, digital terminal field huge market scale, need operator, service provider, channel, producer, user to advance jointly.In conjunction with the particularity of future network medium phone set terminal market development, adapt to the development need in broadband industry market, back.The terminal that faces the future industry, Opportunity coexists with challenge.The network media phone set terminal radio network interface solution that the present invention releases, not only strengthened network media phone set terminal operator, service provider and terminal equipment manufacturer core competitiveness, also will the expansion of China's NGN application market at the early-stage have been provided strong support simultaneously in radio multimedium market.The whole industry chain of network media phone set terminal need provide the seriation novel product of specialized and skilled practicality, this will following wireless user use and the WiMAX value chain of operator in occupy more and more important position.
Description of drawings
Fig. 1: the adaptive cordless communication network access network of the present invention medium phone set terminal solution schematic diagram
Fig. 2: the network media phone set terminal functional interface block diagram of band Network adaptation interface module of the present invention
Fig. 3: Network adaptation interface module structure chart of the present invention,
Fig. 4: Network adaptation interface module of the present invention realizes the hierarchical chart of TCT/IP
Fig. 5: radio communication PCMIC card of the present invention and interface schematic diagram
Fig. 6: Network adaptation interface module of the present invention and network media phone set terminal system board integrated
Fig. 7: PCI internal structure block diagram of the present invention
Fig. 8: PCI hardware fifo circuit figure of the present invention
Fig. 9: Network adaptation interface module of the present invention initialization and data transmit-receive block diagram
Figure 10: the physical interface conversion of Network adaptation interface module of the present invention
Figure 11: network media phone set terminal radio communication catenation principle frame diagram of the present invention
Figure 12: the typical wireless application of network media phone set terminal of the present invention
Among Fig. 1 the terminal of network media phone of dsp chip solution integrated CPU, demultiplexing, audio frequency and video solution, two dimension The modules such as graphics process, coding and peripheral port. Be saving chip area, these independent sectors are to connect by bus mode Be connected together. Be the performance of improved system, normally from the speed that improves CPU, strengthen two dimension and even 3-D graphic Set about the aspects such as reason ability, the interface number that increases peripheral port and type, thus the mutual place of improving on the whole system The reason ability. Terminal of network media phone design adaptation network interface is via external serial wireless communication (transmitting-receiving) equipment Accessing Internet; The selection of wireless communication (transmitting-receiving) equipment can be selected according to radio network conditions and application demand Select. Communications applications layer software comprises internet browsing, file transfer, voice communication and video communication etc. Intelligent terminal SIP (conversation initialized protocol) belongs to application layer software, and it operates on the embedded OS, by the access wireless network Network equipment, the Radio Terminal Function of realization network media phone.
Among Fig. 2, with the terminal of network media phone based on flush bonding processor of integrated adaptation network interface function, consider The complexity of operational network software application adopts the higher process chip of dominant frequency. For module adaptable interface function, Terminal of network media phone microphone input interface and headset output interface, audio frequency and video coding/decoding interface and USB interface, On the RJ-45 interface basis, expand again an adaptive USB2.0 interface and a pcmcia interface. At network media phone Use the program/data storage of 32M byte in the terminal network adaptable interface modular design, be convenient to the Network adaptation wireless network The network application program.
The main control module of Network adaptation interface module is the DSP module among Fig. 3, has also disposed 32K in the external data space of DSP * 16 high-speed SRAM, can buffer memory 80 surplus frame data, be used for the Error Control ability of raising system. DSP utilizes synchronous serial Mouth receives the synchronous serial data of sending here, utilizes asynchronous serial port to receive the radio communication peripheral hardware and sends temporal information here (for initial Change the FPGA time service clock), utilize external bus interface access wireless peripheral time service clock, external SRAM, communication apparatus communication Register in the sheet of controller. Main control module is used for finishing the tasks such as reception, restructuring and unloading scheduling of Frame.
Fig. 4 has realized IP and ICMP in Internet. The IP agreement is most crucial in the ICP/IP protocol bunch Agreement, it provides connectionless datagram to transmit service, and all upper-layer protocols all will transmit with the IP data packet format. I The P agreement is realized by two file ipin.c and ipout.c. Ipin.c is responsible for receiving the IP number According to bag, receive IP bag after, at first judge its version number, data length, destination address, check and whether correct, again Giving corresponding upper-layer protocol according to the value of the protocol type field of IP stem processes; Ipout.c is responsible for transmission The IP packet receives the data that the upper-layer protocol transmission is got off, and adds the IP stem of 20 bytes, and source I correctly is set P address and purpose IP address, protocol type, calculate check and, give following link layer and send. On the PC The IP packet when its length surpasses the MTU of network, allows its segmentation; In DSP, then do not support The IP Option Field is not supported in the segmentation of IP packet yet. The ICMP agreement is responsible for transmitting error message and other needs The information of noting, and determined the kind of information by the type field of 8 of ICMP stems and 8 s' code field. In DSP, only realized the processing of echo request (type code is 80) message is received ICM from the IP layer Behind the P bag, judge whether its type code section is 80. If so, these two fields are set to 00 (echo is replied), Calculate check and, give again the IP layer and send; If not, then abandoned. Thereby realized the function to ping Support.
Fig. 5 network wireless adaptable interface module base plate provides a master control processing module and takies the wireless of proprietary PCI slot Interface module backboard, PCMCIA slot are the important Network adaptation interfaces of terminal of network media phone, and can be used for inserting does not have The gauze card, wireless NIC can add exterior antenna as required for the effective range that enlarges them. PCMCIA's is main Advantage is can warm swap, can realize plug and play after cooperating suitable software. The inside row wire terminal of module base plate is 68PIN: high-performance wireless net CARD specification-CardBus, typical card is of a size of 54*85.6mm2。
Fig. 6 terminal of network media phone Network adaptation interface module is communicated by letter mainly by system's pci bus with the terminal motherboard Finish. Realize complete PCI main control module and the function of object module by special chip, with the pci bus of complexity Interface conversion is relatively simple user interface, and the user only need design the EBI after the conversion. Select PCI among the design The bus Special Interface Chip comes the development interface card. On structure, PCI is at CPU and original terminal of network media phone The one-level bus of inserting between the system bus, specifically by the management of a bridgt circuit realization to this one deck, and about realizing Between interface with the transmission of coordination data. DSP provides the signal buffering, makes it to support multiple peripheral hardware, and can be when high Keep high-performance under the clock frequency. Pci bus (comprising PCI-Express) is the snoop bus master technology also, allows the outside to establish For obtaining bus control right when needed, transmit with expedited data.
PCI9054 among Fig. 7 and Fig. 8 (interface and chipset) meets PCI V2.1, and the V2.2 standard comprises the PCI power management Characteristic. * support the PCI expansion of VPD (Vital Product Data).
*, two independently dma controllers able to programme are provided, and each passage is all supported piece and Scatter/Gather Dma mode, DMA passage 0 is supported the request dma mode.
* in the PCI start-up mode, can insert the configuration cycle of Class1 and type 2. PCI ← → Local Bus data biography Transmission rate is up to 132MB/S.
* support local bus (Local Bus) direct interface bus protocol equipment.
* has optional serial eeprom interface.
* the local bus clock is provided by the outside, and this clock can be asynchronous with pci clock.
* have 8 32 Mailbox registers and 2 32 Doorbell registers.
Shown in Figure 9, udp protocol is a kind of towards connectionless insecure agreement, with two file udpin.c and Udpout.c realizes. Udpin.c realizes the processing to the input of udp bag, judge its port numbers, Check and whether correct, correct then give the application program of corresponding port with its data, incorrectly then abandon; Udpo Ut.c realizes the processing of udp bag output from the application program receive data, is arranged corresponding source port number and order Port numbers, give again the IP layer and send. It should be noted that the check of calculating the UDP bag and with calculate the IP bag Check and be different, the check of IP bag and only covered the stem of IP bag, the check that UDP wraps and then covering Stem and all data of UDP bag have been covered. UDP bag calculate check and the time also introduced the puppet of 12 bytes Stem comprises the source IP address of 4 bytes, the purpose IP address of 4 bytes, zero section of 1 byte, the association of 1 byte The check of view section and two bytes and, its objective is to allow twice inspection of UDP data whether correctly arrive the destination. T Although CP agreement and udp protocol are both transition layer protocol, it provides a kind of connection-oriented reliable byte stream Service. Transmission Control Protocol be the most complicated in institute's protocols having, also be of the most difficult realization, mainly by tcpin.c, tcpout.c, Four file blocks of tcptimer.c and tcpstatem.c are realized, and are simplified according to the needs of concrete application. TCP Controll block tcb realize that with structure each tcb comprises all controls and the state that TCP connects Information, whole tcb has formed a doubly linked list, is conducive to search in all TCP connect. Tc Ptimer.c is in charge of the various status informations in the Transmission Control Protocol, and it includes the forward-backward algorithm pointer, makes it Form timer expiry, the Transmission Control Protocol on the PC comprises two timers of speed, has only realized one 5 here The at a slow speed timer of 00ms because there is not quick timer, so do not support the ACK message delay, is received a frame Namely send immediately ACK; Tcpstatem.c is the state machine function of TCP, connects residing different shape according to TCP The status change that attitude and event decide TCP to connect; Tcpout.c is responsible for the tcp message Send, typical process of transmitting is when receiving the data of upper level applications, at first sends the SYN frame, with target The node three-way handshake connects, and adds afterwards the TCP stem, and give the IP of lower floor module and send, and fixed by retransmitting The time device realize overtime repeating transmission, continue the function such as timer send window explore frame, treat that all data are sent and obtain really Recognize rear transmission FIN frame, close connection by 4-Way Handshake, tcpout.c also can be in different conditions and event Lower other TCP messages such as ACK frame, RST frame that sent by other routine call; Tcpin.c is responsible for connecing The tcp data bag that receipts receive from lower floor's IP module, and the status information and the TCP head that connect according to TCP Each flag bit of section carries out branch process, gives the upper level applications of corresponding ports with data, and calls other function Realization is to response and the status change of TCP bag. Often can safeguard simultaneously that on PC many TCP connect; But On DSP, because the restriction of DSP speed and RAM capacity only supports a TCP to connect; So greatly Simplified the complexity of program, also satisfied actual needs simultaneously, if needs will be arranged from now on, can also expand.
Interface module among Figure 10 in the Network adaptation interface module disposes according to the adaptive needs of the interface of external network The standard interface connectors such as PCISIG, USB2.0 and RJ-45 connect with above interface and cooperate.
The electrical design of CompactPCI hot plug veneer must satisfy hot plug standard " CompactPCI Host Swap Specification " requirement. Guarantee when the plug veneer, can not produce bigger rushing to the CompactPCI bus Hit, can not affect the correct of transfer of data on the CompactPCI bus, when carrying out the electrical design of hot plug veneer, must Must consider that static discharge, precharge, train of signal lump are joined, holding wire length limits and the restriction of filter capacitor size Etc. several aspects.
Highly integrated USB turns to UART bridger chip, and function control device, USB transceiver shake at full speed to include USB2.0 Swing device and Asynchronous Serial Interface (UART). The repertoire of this chip is integrated in the IC of the MLP28 encapsulation of a 5mm * 5mm In. CP2101 is built-in with the usb protocol with compunication, during work, can go up and produce a virtual com port, and the user just Can use this com port according to the control mode of general serial mouth.
Among Figure 11,12, the plurality of wireless networks environment comprises several different radio access terminal equipments, IP call center's platform, SIP gateway etc. is connected IP backbone, and is connected to PSTN net and INTERNET. The basic service program is as follows:
1. pass through wireless access network: the phone of terminal of network media phone and PSTN carries out voice communication;
2. pass through wireless access network: the SIP-VoIP client on terminal of network media phone and the wireless network computer is soft Part carries out Speech Communication;
The jargon sound communication 3.PSTN the terminal of network media phone on the call wireless network of network is gone forward side by side;
Terminal of network media phone external tv machine/sound equipment by IP call center's platform access media server and The Internet resources of Internet comprise that media information is browsed with multimedia file to transmit.
Wireless access way comprises: the Bluetooth wireless access network: indoor short-distance wireless internet, indoor wireless connects Network; Access communications is made as outward: wireless aps+basket tooth INC;
Home RF wireless access network: indoor short-distance wireless bridge, access communications is made as outward: radio modem;
802.11 serial wireless access network: indoor/LAN/outdoor fixed wireless network, access communications is made as outward: wireless aps+ Wireless INC, wireless HUB;
The LMDS/MMDS wireless access network: zone or metropolitan area fixed wireless broadband access network, access communications is made as outward: do not have Line AP;
The CDPD wireless access network: FX radio bandwidth access network+WLAN, access communications is made as outward: wireless HUB;
GMS-GPRS/WCDMA/TD-SCDMA: mobile cellular wireless speech/data communication network, accessing terminal is INC Or mobile phone;
3G network: multiple wireless broad band technology is in the fusion of mobile network, and each wireless base station of new 3G system directly connects unification IP kernel heart net, edge net, no longer set up special wireless access network. Two schemes is arranged, and first method is unified On the IP network by the building tunnel VPN, still adopt present GSM the second layer handoff techniques and Equipment. This method can adopt unified handover and the IP roaming problem of solving of Hierarchical Mobile IP technology, namely can separate The vertical roaming that the level roaming also can solve between the different wireless systems between the same wireless system base-station subnet of determining is asked Topic. New 3G system no longer arranges special circuit exchanging telephone system, provides with better function based on SIP and replace Mobile IP network medium phone set terminal. Mobile network's medium phone set terminal and fixed network medium phone set terminal use common IP kernel heart net, common control and management and charge system, common SoftSwitch and gateway system. Like this can be significantly Degree reduces networking and terminal of network media phone operation cost.
Embodiment
1, support the implementation of the network media phone set terminal that wireless network inserts:
Network media phone set terminal design adaptation network interface module can insert the Internet via external serial wireless communication (transmitting-receiving) equipment; The selection of wireless communication (transmitting-receiving) equipment can be selected according to radio network conditions and application demand.Communications applications layer software comprises internet browsing, file transfer, voice communication and video communication etc.The SIP of intelligent terminal (conversation initialized protocol) belongs to application layer software, and it operates on the embedded OS, by the visit Wireless Communication Equipment, realizes the Radio Terminal Function of network media phone.The software of communications applications realizes making system to possess better flexibility and wireless adaptation, promptly do not do under the condition of too big change at system hardware, the user not only can realize popular multimedia communication protocol such as Session Initiation Protocol stack at present, also can meet the embodiment of NGN business-driven feature according to the special suitable Access Network wireless communication protocol of needs exploitation.(Fig. 1)
2. the functional interface of wireless network interface modules
With the network media phone set terminal based on flush bonding processor of integrated adaptation network interface function, consider the complexity of operational network software application, adopt dominant frequency high processing chip.At module adaptable interface function, network media phone set terminal is expanded an adaptive USB2.0 interface and a pcmcia interface (being not limited thereto interface certainly) again on microphone input interface and headset output interface, audio frequency and video coding/decoding interface and USB interface, RJ-45 interface basis.In the design of network media phone set terminal Network adaptation interface module, use the program/data storage of 32M byte, be convenient to Network adaptation wireless network application program.The operating system of using is class Linux embedded real-time operating system THOS[1], cooperate corresponding bottom layer driving, can realize by of the visit of serial peripheral hardware wireless module Internet.(Fig. 2)
In order to strengthen the interface system framework that design flexibility also can adopt high modularization, adopt and the wireless baseband processors application of most of wireless device vendors and the general-purpose interface scheme of Wireless Telecom Equipment compatibility.Utilize minimum design resource, adopting identical basic design and changing processor simply to provide unified Network adaptation interface scheme at serial wireless network environment.
The firstth, utilize general embedded interface:
Integrated UART, I
2C or USB.These embedded interfaces can provide the occupy-place size of high compression, and help to reduce system cost, because they do not need extra logic.In addition, their power consumption is also very little.However, these interfaces still have functional limitation separately.
Have the transmission rate of 230kbps based on the interface of UART, can support basic 2.5G wave points such as text message and GPRS.Based on I
2The design of C can reach the speed of 400kbps, can support Edge to realize.But for the network that upgrades some, such as cdma2000 3x, W-CDMA or cdma2000 1xEV-DO, this interface just becomes main performance bottleneck.
Now a lot of flush bonding processors are all supported low speed USB 1.1 interfaces, compensation repeat and operation such as shake hands before the transfer rate that is 1.5Mbps to the maximum can be provided.But, even if this extra bandwidth also is awkward in the high-performance 3G network.When inserting the 802.11b Wi-Fi network of 11Mbps or higher rate, it is more obvious that these limitations will become.The possibility of second enforcement is to adopt proprietary scheme:
See that from the angle of performance this method is actual more.Realize that customization ASIC, the perhaps proprietary bus that is provided by some flush bonding processor suppliers can be provided the multiprocessor communication scheme.Can be network media phone set terminal like this provides the high-speed data-flow of wireless standards such as better interface support 802.11 and DMB.But consider that network media phone set terminal is difficult to the output that reaches enough before large-scale mass production, customize the expensive of special-purpose adaptable interface module with Compensation Design and manufacturing.The multiprocessor scheme of proprietary bus architecture has limited the selection for wireless transmitting-receiving equipments, because selected device must be supported this proprietary bus.
The possibility of the third enforcement is that the employing multiport memory is supported the communication between processor:
This device is integrated memory and control logic, the shared central memory of access simultaneously.Each port has independently control, address and I/O pin, therefore can realize independent, the asynchronous read and write operation of any position in the memory.
Angle from planned network medium phone set terminal Network adaptation interface, the performance allowance that communication means provided between sort processor can be guaranteed enough bandwidth, not only can support existing 3G standards such as cdma2000 1xEV-DO, but also can support that the speed of service is the HSPDA of 10Mbps and the new generation of wireless data communication interfaces such as 802.11g of 54Mbps.In addition, it is also most important that this extra bandwidth is moved emerging multimedia application to next generation network, and the needed disposal ability of the emerging application of part is 2 to 5 times of current application desired properties.Video Applications requires the message transmission rate between application and the baseband processor will reach 2Mbps at least.
The multiprocessor communication scheme that makes up based on the multiport device also has another significant advantage, and promptly they adopt the simple SRAM interface of industrywide standard.Nearly all on the market flush bonding processor is all supported this interface at present, therefore is easy to the system of creation moduleization, thereby can changes module easily to satisfy the different interface standards or the demand in market.Device range of choice is widely not only arranged, and can reduce system cost, because be identical at the basic design in different markets.
3. hardware designs:
Network media phone set terminal Network adaptation interface adopts modular method to control and is connected dissimilar wireless communication networks connecting systems.Its basic module is the adaptable interface module with particular design, the communication media wireless peripheral (as wireless lan (wlan), bluetooth, GSM/GPRS, the wireless access terminal of the CDMA and the 3G network in future etc. etc.) that each interface module is corresponding specific.Network wireless adaptable interface module mainly is made of main control module, interface module and the backboard in each intermodule exchange of network media phone set terminal system and control signal, and base plate comprises and holds these modules.
3-1. main control module:
Network media phone set terminal Network adaptation interface module comprises a main control module: the AT Command Set that a control system operation externally is provided, by receiving the AT order that sends from external Wireless Telecom Equipment communication controler, explain and the corresponding operation of execution, thus the corresponding function of realization Wireless Telecom Equipment.Can save the resource of network media phone set terminal system like this.Main control module comprises the following aspects by interface module with wireless peripheral (wireless network access device communication controler) the used AT Command Set of communicating by letter:
(1) general control command: comprise that external Wireless Telecom Equipment detects, the state setting.
(2) network service command: comprise signal quality, service provider's selection etc.
(3) Data Control order etc.
(4) administration order fully: comprise PIN input, phone lock, password modification etc.
Network media phone set terminal motherboard provides the UART driving with the main control module compatibility, can realize the detection of transmission, radio communication peripheral hardware answer signal and the operating state of AT order by the direct programming to the master control module controls register.
The main control module of network wireless adaptable interface module is the DSP module, has also disposed the high-speed SRAM of 32K * 16 in the external data space of DSP, can buffer memory 80 surplus frame data, be used to improve the error control ability of system.DSP utilizes synchronous serial interface to receive the synchronous serial data of sending here, utilize asynchronous serial port to receive the radio communication peripheral hardware and send temporal information (being used for initialization FPGA time service clock) here, utilize the interior register of sheet of external bus interface visit wireless peripheral time service clock, external SRAM, communication apparatus communication controller.Main control module is mainly used in the tasks such as reception, reorganization and unloading scheduling of finishing Frame.(see figure 3)
3.2. interface module:
The interface of the Wireless Telecom Equipment (AdRNTter) of present main flow, all connect easily with computer, and no matter it is the transceiver of the sort of wireless network. this just brings a lot of convenience to the design of network media phone set terminal Network adaptation interface module, from existing product: mainly be PC CARD (PCMCIA), USB interface and standard RJ-45 network interface.The PCISIG interface:
PCISIG (Peripheral Component Interconnect Special Inter-est Group) has 32/64 bit width, high transmission rates at 64 industry normal structures because of it) trend of bus, consider current demand and Future Development, the interface of wireless NIC occurs with the form of PCI plug-in card, the characteristic of the efficient wireless network peripheral hardware (CardBus) of PC CARD form is except light, little, also have plug and play (plug and play) function, but the what off-mode is installed down or is changed; Its connection interface is the 68pin joint, area 85.6 * 54mm, and general-purpose thick is: 5mm.Wireless Telecom Equipment with PCISIG interface can not need cable and makes network media phone set terminal at network communication.
The wireless NIC of main flow (PIC slot wireless network card) adopts CardBus power PC card bus interface standard, compares with original PC card standard, has following advantage: transmission of the first, 32 bit data and 33MHz operation.The maximum throughput of CardBus Fast Ethernet PC card is near 90Mbps, and the second, bus is autonomous.Make the PC card can be independent of host CPU, and direct swap data between calculator memory, CPU just can handle other task like this.The 3rd, low-power consumption has reduced inner thermal diffusion, has strengthened the reliability of system.The 4th, the PC card that backward compatibility is 16.
Network media phone set terminal provides the radio interface module that takies proprietary PCI slot backboard at the adaptable interface module of wireless NIC by 68-PIN standard interface winding displacement in the machine, and be connected with main control module, the PCMCIA slot is the important Network adaptation interface of network media phone set terminal, can be used for inserting wireless network card, wireless NIC can add exterior antenna as required in order to enlarge its effective range.The advantage of PCMCIA is can warm swap, realizes plug and play after cooperating suitable software.
USB interface: conventional peripheral devices interfacing not only message transmission rate is lower, monopolize computer system keystone resourceses such as interruption, I/O address, DMA passage, cause resource conflict problem easily, and numerous and diverse installation configuration formality has also brought inconvenience to the terminal use when using.In recent years, the USB interface technology develops rapidly, and the novel computer terminal provides support to it one after another.USB2.0 is the newest fruits of USB technical development, utilize USB2.0 interfacing exploitation network wireless adaptable interface module, not only can use its error control mechanism alleviates development effort, obtains high speed data transfer ability (480Mb/s), and can realize the outer plug and play characteristic of interface easily, make things convenient for network media phone set terminal user's use.Backboard can exchange the data bus structure of control signal at intermodule.Be inserted in the inner master control processing module module that connects in the slot of backboard, be connected to the outside by an interface module USB connector.Intermodule carries out communication by control of one 8 Bits Serial number and data/address bus.High speed USB 2.0 interfaces of expansion can increase by lotus flower type connected mode.
The RJ-45 interface: the network interface of network media phone set terminal is a standard RJ-45 interface, this interface support is connected with wired ethernet, the RJ-45 interface is an Ethernet common interfaces the most, RJ-45 is a common name, refer to 603-7 standardization, use modular jack or plug by 8 positions (8 pin) of international connector standard definition by IEC (60).At outfit standard RJ-45 interface wireless peripheral hardware, its connection and occupation mode and wired ethernet are equal to.
4. software design
The software of Network adaptation interface module adopts the embedded design method to design (Fig. 4).Its groundwork process is: when there is signal the outside, radio communication peripheral hardware (Transmit-Receive Unit) is received signal and send to communication controler at first, communication controler receives and issues the reception buffering area on the network media phone set terminal Network adaptation interface module, replys by main control module then.Treatable order, data instant are handled, and all the other contents are passed to host computer by PCI dual port RAM interface and handled.Otherwise, when host computer need send information to wireless network based on the radio communication peripheral hardware, signal is earlier by the PCI dual port RAM, be passed to communication controler through the adaptable interface module again and send buffering area, the content that will be sent in the buffering area by communication controler at last sends to wireless network by wireless transmit/receive units.
Wherein communication controler receives message and message is sent to wireless transmit/receive units through wireless transmit/receive units and all adopts dma mode.The Network adaptation interface module has a direct memory access table, thereby is very easy to the Data Receiving and the transmission work of network media phone set terminal interface.Utilize this DMA table, the Network adaptation interface module can directly deposit reception information in internal memory, or from internal memory transmission information, and do not need the intervention of CPU.
Network media phone set terminal only need be specified the region of memory that receives buffer area when receiving, and the Network adaptation interface module deposits information in buffering area automatically in order.Buffering area is a circulation continuous space, so when data (information) deposit the buffering area end in, the Network adaptation interface module will turn back to buffering area start bit pointer and continue to write the next one and receive byte.Buffering area needs 16KB or greater room.The user only needs the length of the start pointer of appointed information when sending, and the Network adaptation interface module sends this information to the radio communication peripheral hardware when receiving the transmission order, be sent on the spider lines by wireless transmit/receive units again.
Software can be solidificated in the internal memory of main control module of Network adaptation interface module, or is stored in specially in the memory that main control module sets up.Can control and extraneous networks of different type adaptable interface module of carrying out communication for coordination.Correspond to different interface modules, the Control Software that is stored in the main control module needs related corresponding performance parameter (for example level grade of transmitting/receiving wireless network signal Peripheral Interface).These performance parameters are written in the interface module again when system boot.These characteristics have significantly reduced MTTP (mean time to repair), and this makes the maintenance personal needn't adjust related data again when changing a module that breaks down.
5. the system integration
Network media phone set terminal Network adaptation interface module is mainly finished by system's pci bus with communicating by letter of terminal motherboard.
At present, the selection of pci bus interface circuit mainly contains two kinds of schemes.But a kind of is to select editorial logic device (PLD) for use.Use PLD, user can develop the chip that is fit to own needs neatly with specific function, but pci bus agreement more complicated, it is bigger to design PCI control interface difficulty, and for the design of Network adaptation interface module, cost is bigger.Have the manufacturer of many production programmable logic devices that the pci interface functional module of testing through strict all is provided now, the user only need make up and get final product.Or select PCI special chip group (claiming bridgt circuit again) for use, realize the complete PCI main control module and the function of object module by special chip, the pci bus interface of complexity is converted to relative simple user interface, and the user only need design the bus interface after the conversion.Select for use pci bus special purpose interface chip to come the development interface card among the design.On structure, PCI is the one-level bus of inserting between CPU and original network media phone set terminal system bus, specifically realized this layer-management by a bridgt circuit, and the interface between realizing up and down is with the transmission of coordination data.DSP provides signal damping, makes it to support multiple peripheral hardware, and can keep high-performance under high clock frequency.Pci bus is the snoop bus master technology also, allows external equipment to obtain bus control right when needed, transmits (see figure 5) with expedited data.
In the Network adaptation interface module, main control module is used to handle the high speed data transfer with external network.It is operated under the ordinary processor interface modes, dsp chip control gating signal.Under the effect of FPGA decoding logic, register is mapped in the outer data space of sheet of DSP in the sheet of main control module.The register that DSP will visit by 8 bit address line options under the control of read-write gating signal, utilizes 16 position datawires and selected register exchange data.When visit byte register, data/address bus high byte content is unimportant.Register to the bus events that DSP report takes place, utilizes D+, D-pin to finish exchanges data with main frame by interrupt pin INT.
Existing P CI interface chip mainly contains the AMCCS59xx series of AMCC company and the PCI905x series of PLX company; Select for use the PCI9052 target device chip of PLX company to come the main control module of planned network adaptable interface module in the present embodiment design.9052,9056 can also be used for the present invention.
5-1.PCI9054 introduce
PCI9054 is the advanced person's that produced by U.S. PLX company a PCI I/O accelerator, has adopted advanced PLX data pipeline structure technology, is 32, the pci bus master I/O accelerator of 33MHz; Accord with PCI local bus specification 2.2 editions, burst rate reaches 132MB/s, and local bus is supported multiplexing/non-32 multiplexing bit address/data; M, C, three kinds of patterns of J are arranged; Optional at different processors and office's bus characteristics, reduce intermediate logic as far as possible; Have optional Serial E 2PROM interface, the local bus clock can be asynchronous with pci clock.There are 6 kinds of programmable FIFO PC9054 inside, to realize the asynchronous operation between zero-waiting burst transfer and local bus and the pci bus; Support holotype, from pattern, DMA transmission means, because of its strong functions can be applicable in adapter and the embedded system.PCI 9054 be a kind of property than high PCI bridge circuit chip, more superior than performances such as PCI9080, PCI9050.
5-2. hardware designs
Main control module is selected the PCI9054 chip for use, reason is as follows: the 1. S5920 of AMCC company, chips such as the PCI9052/50 extensive use on market of PLX company at present, their superiority mainly is the function that has realized the PCI target device, and the local bus signal similar to isa bus signal compatibility or sequential is provided, be the optimal selection that seamlessly transits to the pci bus platform from ISA; But they do not support PCI 2.2 agreements, no matter are that service speed or transmission bandwidth have belonged to backwardness on performance, and from the developing direction of DSP and adapter, the signal environment of 3.3V low-voltage is the more selection of main flow.If 2. just link to each other with office total processor, it will be excellent first adopting CY7C09449PV-AC; But because each functional module effect difference of native system is different with the mode of main frame exchange message, can not share the right interface of CY7C09449PV-AC simultaneously, therefore not select for use; 3. the DSP in the signal generator module also can initiate transmission in needs, so decision adopts master/slave controller better.So select PCI9054.PCI9054 also is the mainstream chip that present industry design adapter is selected for use.PCI9054 is with its strong functions and simple user interface, for the exploitation of pci bus interface provides a kind of succinct method (seeing Fig. 7,8).
PCI9054 can only depend on main control device and transmit data from reading of data wherein or to it, so need a microprocessor to the order that sends to local bus from pci bus by the PCI9054 response of dealing with, perhaps the data that the user is wanted to transmit notify pci bus to read in the mode of interruption.Microprocessor is selected 16 bit DSP chip TMS320LF2407 (can certainly select the ARM acp chip for use) of the C2000 series of TI company for use in the present embodiment.
The interface module circuit comprises that network interface, receiving circuit, transtation mission circuit reach and the interface circuit of DSP.Select the peripheral circuit of TMS320LF2407 as main control module PCI9052.TMS320LF2407 is the fixed DSP processor that TI company releases, and is the higher chip of a cost performance.It adopts the static CMOS technology of high-performance, supply power voltage is 3.3V, instruction cycle can reach 25ns, the single port RAM (SARAM) of data/program RAM, 544 word dual port RAMs (DARAM) and the 2K word of FLASH program storage up to the 32K word, 1.5K word is arranged in the sheet, can expand 64K word external program memory, 64K word external data memory and 64K word I/O addressing space respectively; Also integrated a plurality of peripheral modules and the memory that comprises the CAN controller can apply in the control of high-speed data communications in the sheet; The A/D converter minimum transition time of 10 16 passages is 500ns; Inside carries WatchDog Timer module (WDT) and 16 s' Serial Peripheral Interface (SPI) module (SPI).In addition, this chip has up to 40 and can programme separately or multiplexing general I/O pin, a serial communication interface (SCI), a parallel port and 5 external interrupt.What 32 bit DSP chip TMS320LF2812 of the C2000 series that puts goods on the market on probation at present adopted is the clock rate of 150MHz, and its instruction cycle only is 6.7ns, and memory can expand to 1M, and speed is faster, and is with better function.
Because TMS320LF2407 inside carries the FLASH program storage of 32K word, after finishing, program debugging can programming enter, but need frequent update routine in the program debugging process, so can expand a slice memory, being used as program storage during debugging routine uses, after finishing, program debugging is re-used as data storage usefulness, and convenient and practical like this.TMS320LF2407 has a serial communication interface and one 16 parallel-by-bit communication interface, and serial ports can be made RS485, RS232, RS422, SDI bus interface etc., and parallel communication interface can be made 16 parallel-by-bit input/output interfaces.(Fig. 6)
In order from the pci bus configuration register, to obtain the mapping plot of main frame dynamic assignment and mapped port to be read and write, must write driver.In order to simplify Driver Development, the development kit that can use Jungo company to release.Driver can generate VxD driver and corresponding high-level functions automatically.The high-level functions that is generated can directly be called in senior programming languages such as VC or CBuilder.
After the system power-up, when the main control module layoutprocedure finishes, if the serial data input is arranged, just bit synchronization logic and frame synchronization logic start synchronizing process.Simultaneously, the reset interrupt service routine is carried out immediately in the DSP in-chip FLASH, and under the operational environment of having set up the C language, it can call principal function.In principal function, need arrange a series of initial work that sequencing is arranged properly.Wherein, the initialization procedure more complicated of main control module, the precedence that the supply power mode of employing (being system power supply mode here), grafting main frame and system power on, and need combine with the system bus enumeration process.
Bit synchronization logic and frame synchronization logic in CPLD (or FPGA) all enter synchronous regime, and after main control module cooperates main frame to finish initialization task, transmission course that can log-on data.
5-3. initialization
In initialization procedure, at first need to be provided with some registers that influence main control module PCI9054 self working method, cooperate with interface module then and carry out, reply network service peripheral hardware request from interface end.When the network service peripheral hardware is linked port on the network media phone set terminal network connector by interface connector, main frame just can detect this connection, then power up to this port, checkout equipment also activates this port, sends reset signal to main control module PCI9054.After main control module is received this reset signal, promptly enter default setting, after this just can respond the device request that host side is sent here by default communication port.Main frame is provided with the device address by obtaining the details that the descriptor request obtains equipment end by Address requests is set, by the selected suitable device configuration of configuring request is set.In the main control module success response after these device request, just can be with main-machine communication.
In the process of main control module response host request, PCI9054 needs the end points of configuration interface module to realize dissimilar transmission channels.According to the requirement of message transmission rate, except default control channel, realized the input channel of one batch of transport-type in the system.Like this, interface module just can be transmitted data from main control module data conversion storage system to main frame easily as FIFO, and has the error control ability, has simplified the complexity of equipment end software design.
5-4. transmitting-receiving unloading
During Network adaptation interface module operate as normal, need cooperatively interact with the host side program.The program that host side need realize comprises device driver and application program.Driver receives the request of application program, utilizes bus driver and host controller driver (HCD) to arrange bus transaction by console controller, and main control module PCI9054 is then according to the transmission of the Frame of the corresponding peripheral hardware of these transaction schedulings.
The reception unloading process of Frame is mainly by the formation of having set up a Frame among the responsible externally SRAM of main control module PCI9054.System operates mainly under the drives interrupts pattern, and the interrupt service routine relevant with synchronous serial interface is responsible for setting up rear of queue, is responsible for setting up the head of formation corresponding to TMS320LF2407 interface module interrupt service routine.When frame data of taking the lead with frame alignment word arrive with the form of serial bit stream, the frame-synchronizing impulse that FPGA produces can directly start the DSP synchronous serial interface and receive data, and this lock-out pulse is that the reception of frame data is ready with interrupt mode notice DSP simultaneously.Whether after PCI9054 has notice, at first checking has enough spaces to hold frame data in the external SRAM.If there is not the space, then abandon current data frame (according to design, this situation is rarely found); If have living space, then keep enough spaces for current data frame.Then fill in frame alignment word, after reading the currency of time service clock and filling in frame alignment word in frame start position.Like this, a new Frame has just been set up, but do not join in the formation, but will wait for after subsequent data from synchronous serial interface embeds in this frame and joining in the formation.
The reception buffering area of synchronous serial interface can propose interrupt requests to PCI9054 after receiving some words (by initialization time be provided with decision).In interrupt service routine, PCI9052 reads the content that receives in the buffering area, and it is inserted among the above-mentioned frame F_N that newly opens up.After frame data receive, just add this frame to rear of queue, represent that these frame data are ready to, can give host hard drive by interface module and preserve.
When PCI9054 has ready prepd Frame to exist in inquiring formation, batch transmission input endpoint that the end points indexed registers (Endpoint Index Register) that interface module TMS320LF2407 just is set disposes when making it point to initialization fills in the first frame data of formation in the end points buffering area by interface module TMS320LF2407 FPDP register (Data Port Register) then.After the end points buffering area was filled, it just came into force automatically.Under the situation that can not fill up the end points buffering area, can force this end points buffering area to come into force by the VENDP position that controlled function register (Control FunctionRegister) is set.After the end points buffering area came into force, when next IN token arrived on system bus, the data in this end points buffering area just were transferred in the main frame by system bus.After main frame successfully receives data, reply for interface module TMS320LF2407 with ACK.Interface module TMS320LF2407 can report to DSP by the INT pin after obtaining ACK and replying, DSP just can continue to fill in this frame remainder data in end points.
After the first frame data of formation were successfully transferred to main frame, PCI9054 just abandoned first frame data.If also have Frame in the formation, then with inferior first frame as first frame, continue aforementioned transmission course; If the Frame that will transmit then for the first frame point Head_Ptr of formation composes null value (NULL), is not waited for the arrival of new Frame.(Fig. 7)
5-5. circuit board making
On line, need only the corresponding connection of PCI9042 chip TMS320LF2407 pin of chip, and be connected on the bus just passable.A ground connection must be arranged in the pci bus signal.If all earth-free, system can not find development board.Their ground connection has two purposes, and one is used for showing plate of physical presence on the groove position; Its two, provide this plate for information about to power requirement.And, should provide an ac circuit to the 3.3V pin, at this moment decoupling should meet the requirement of high-frequency signal technology over the ground.For this reason, should be on the 3.3V plane evenly distributed 12 high speed electric capacity, be 0.01 μ F easily.For stability, all holding wires of PCI9052 chip and peripheral circuit TMS320LF2407 all should consider to draw resistance (5k Ω～10k Ω) or pull down resistor (generally selecting 150k Ω) in the local bus.For preventing to disturb, the local bus clock also should shield over the ground.
Interface module in the Network adaptation interface module is according to the adaptive needs of the interface of external network, and standard interface connectors such as PCI allocation SIG, USB2.0 and RJ-45 connect with above interface and cooperate.(Fig. 8)
The electrical design of CompactPCI hot plug veneer must satisfy the requirement of hot plug standard " CompactPCI Host SwapSpecification ".Guarantee when the plug veneer, can not produce bigger impact to the CompactPCI bus, can not influence the correct of transfer of data on the CompactPCI bus, when carrying out the electrical design of hot plug veneer, must consider that static discharge, precharge, train of signal lump are joined, holding wire length limits and several aspects such as restriction of filter capacitor size.
Highly integrated USB changes UART bridger chip, includes USB2.0 function control device, USB transceiver oscillator and Asynchronous Serial Interface (UART) at full speed.The repertoire of this chip is integrated among the IC of MLP28 encapsulation of a 5mm * 5mm.CP2101 is built-in with the usb protocol with compunication, during work, can go up and produce a virtual com port, and the user just can use this com port according to the control mode of general serial mouth.
The Electromagnetic Compatibility design
Electromagnetic interference (EMI) is a network media phone set terminal system and difficult point during the Network adaptation interface module that is connected wireless peripheral is integrated.If deal with improperly, the other side's great interference source will be become mutually.How to overcome radio frequency interference and guarantee the operate as normal of whole system, be one primary also be sixty-four dollar question.Mainly should take the necessary measures from the following aspects.
(1) the SMD packaged device is adopted in the selection of device as far as possible, avoids adopting the device of DIP type, reduces current emission (induction) loop area as far as possible, saves chip area simultaneously.
(2) adopt multi-layer PCB board, emphasis signal line wiring (SIM clock, data wire etc.) is considered emphatically, isolate measure independent wiring [6] such as shielding as adopting ground wire.
(3) position of reasonable Arrangement device, Sensitive Apparatus is taked shielding measure.By with the wireless communication module slot configuration as far as possible away from the position of above-mentioned input panel direction, avoid parallel.Suppress to be installed in the deterioration of the transmitting-receiving efficient of the radio communication peripheral hardware use usefulness antenna electric wave on the wireless module slot.
The typical case uses:
Say on the stricti jurise: network media phone set terminal is to use broadband resource under static relatively situation, and that these activities often occur in is indoor.The develop rapidly of Internet must be suitable for the fixing indoor connection that ISP (ISP) provided, and these service providers are with going out one with the telco provider of locality often.And form sharp contrast therewith be, at wireless communication field, operator for the right to use of buying the bandwidth frequency resource, build outdoor wireless mobile covering and dropped into a large amount of capital.Therefore they are difficult to set foot in indoor field always.And all existing second generation digit wireless communication systems all mainly are conceived to provide the business based on speech.This has just handed over indoor data communication service to wired communication system in the several years in the past.
At following 10 years, provide the wireless network access of broadband data service will become the most important subject under discussion of wireless communication field.The demand for development third generation Wireless Telecom Equipment of honeycomb and personal communication is being that the Network that is similar to Internet is provided is core to indoor user.Most telecommunications service commercial city does not have existing system that so indoor covering is provided.Just the new business competitor based on wireless access network of wireless device provides a cutting point in order can provide cheaply for this.
Wireless access is the strong competitor that the honeycomb/personal mobile communication system of core will become IP-based cable network structure with the radio wave, and wireless network is just being attempted to expand to its sphere of influence indoor from outdoor wireless.Utilize existing wired ethernet network structure in building or the zone, cellular technology and WLAN technological incorporation with 2.5G and 3G, just can insert by also cheap fast use wireless network, and the cable broadband that can reach than costliness inserts identical or higher data transfer rate.In ensuing ten years, the high speed wireless data business will be more ripe.And make this key that becomes a reality be the raising of band efficiency.Many Wireless Telecom Equipments provider is arranged now in development with produce the wireless device that to finish various indoor links and wideband switch-in business.Network media phone set terminal adopts the general design method of Network adaptation interface module, can inherit and utilize the existing hardware and software technical research of wireless mobile communication device achievement to greatest extent, thereby reduce the development risk, avoid the development that repeats on the same level, shorten the lead time, save development cost, and, adopt open adaptable interface modular structure, be convenient to realize level and smooth interconnection, information mutual communication and function interoperability with wireless network.The original intention of network media phone set terminal Network adaptation interface module design is to require down optimum efficiency and the quality requirement of realizing that wireless network inserts in order to satisfy network media phone set terminal multi-varieties and small-batch, and its benefited party should be development manufacturer, telco provider and Wireless Telecom Equipment supplier.
Radio Network System generally is made of base station and remote terminal, can communicate by letter with a plurality of remote terminals in the wireless coverage of oneself simultaneously in a base station.The data of remote terminal are converged in the base station, can insert key data network by light loop or microwave SDH loop then.
The wireless network remote terminal is the wireless transceiver that carries out access communications at the base station.Generally include: PCI slot wireless network card (NIC), USB interface/RJ-45 interface RNT access point ACCESS POINT claim wireless network transceiver (comprising the mobile phone that has the radio data communication capacity) again
External or the plug-in equipment (wireless transceiver) of series radio communication inserts the simple and easy method that is upgraded to wireless access by the Network adaptation interface module for network media phone set terminal provides a kind of cable network that will have now.
Network media phone set terminal access of radio network in actual applications service feature as follows: (1). wireless network can use unified IP kernel heart net with fixed network.(2). in order to adapt to the requirement of different user, will adopt the air wireless interface of the multiple use different technologies of optimizing to access rate.(3). the all-IPization of wireless access network can be joined seamlessly to different air wireless interface IP kernel heart net.(4). the terminal phone can be an IP phone, uses unified SIP soft switch and management charge system.(5). can use mobile IP to solve handover and roaming problem.
2. network media phone set terminal radio data network solution:
Network media phone set terminal Network adaptation interface module provide feature richness, can be adaptive with Wireless Telecom Equipment the network interface system platform, this network media phone set terminal system that uses aspect any wireless network services for exploitation has fast created condition.Because the Network adaptation interface module is in design with interface standard technical compatibility existing and Wireless Communication Equipment in the future, therefore telco provider can use the mode on-premise network medium phone set terminal of high performance-price ratio, and can carry out level and smooth wireless network access upgrading from now on.With regard to this aspect, needed flexibility and choice in the time of can guaranteeing network media phone set terminal towards wireless application.Network media phone set terminal can have the wireless communication middleware and the serial wireless communication product of added value by the support of network wireless adaptable interface module.
3. the wireless application of typical network media phone set terminal:
Network media phone set terminal inserts radio local network by external radio communication (transmitting-receiving) equipment, and is connected to IP network by wireless access network through transmission network.The gateway of SIP/equipment such as IP call center's platform connect backbone IP network and PSTN net.Accepted by the SIP gateway from the calling that PSTN comes, wherein speech stream is converted to the IP packet pass through IP network and pass to network media phone set terminal through wireless network; Accept the calling of network media phone set terminal simultaneously, turn to PSTN purpose terminal (phone).Network media phone set terminal also can be communicated by letter with other computer or network media phone set terminal of Internet network, perhaps by the media server of dialing (IP address translation) mode through wireless network access Internet network IP call center.(Fig. 9)
3-1. private wireless network:
Be mainly used in personal user's working space, typical range covers several meters, network media phone set terminal by bluetooth (Bluetooth) or HomeRF wireless pc I slot wireless network card (NIC) can with computer peripheral hardware synchronous transmission file, visit local ancillary equipment, as mobile phone, printer etc.
Network media phone set terminal can be networked with the mobile phone wireless of embedded with bluetooth radio function easily, and enter the people internet by mobile phone through mobile data network by the wireless network adaptable interface module that has adopted Bluetooth technology.
HomeRF can create a radio infrastructure for home environment, can be used for the networking of network media phone set terminal and family expenses information terminal (as home PC, VCR, camera and printer etc.).The requirement that the height output of HomeRF and QoS characteristic can satisfy video transmission of network media phone set terminal and data communication.In this case, RNT may provide " up " link to public Internet.
3-2. WLAN (wireless local area network):
Be mainly used in broadband home, inside, building and inside, garden, typical range covers tens meters to rice up to a hundred.Network media phone set terminal can insert wireless HUB by wireless 802.11 Series PC I slot wireless network cards (NIC), visit Internet.The WLAN technology can provide broadband access network or various value-added service for the user in MSRNT equipment side certain limit, because its high bandwidth and good mobility, make it in the business among a small circle that needs broadband access provides, have very big advantage, and can on the MSRNT network management platform, carry out unified management.Can have the potential ability that forms broadband mobile data connection based on 802.11 wireless L AN, it provides the ability of data service considerably beyond cell phone system.The WLAN of present 802.11 standards can be held 127 users approximately at most.
3-3. fixed wireless broadband access network:
The fixed broadband wireless that overlay area and wide area environment, LMDS/MMDS are mainly used in a big way inserts.Network media phone set terminal RJ-45 interface connects wireless LMDS/MMDS series wireless transceiver RNT, LMDS/MMDS is because its wireless transmission distance is far away, bandwidth ratio is bigger, and the transmission of support voice business and data service simultaneously, therefore this technology is to more remote area, and the zone that present Wireline also can't arrive can be described as optimal access way; Perhaps startup carrier can't re-lay under the situation of circuit, and this technology can not have to provide miscellaneous service for the user under the situation of Wireline for operator.
As a main fixed wireless broadband access technology, LMDS moves to maturity just gradually, becomes a selection of enterprise, residential customer.LMDS provides type optical fiber speed can be up to the business of 155Mbps, and speech and high-speed data service can be bundled provides, and this is very attractive to the bigger enterprise of traffic carrying capacity, is specially adapted to not obtain the particular market of broadband service.In the underdeveloped country of those infrastructure, LMDS also be a kind of cheap, risk is low, system flexibly, can promptly provide professional in some months, to satisfy user's needs.
Network media phone set terminal USB or RJ-45 interface connect by CDPD wireless transceiver RNT, are mainly used in the Internet visit
3-4. wireless mobile cellular network:
Cover metropolitan area and wide area environment, the mobile communication service of wireless speech/data be provided.
Network media phone set terminal can insert wireless mobile cellular network by GSM-GPRS, CDMA-1X, W-CDMA, TD-SCDM Series PC I slot wireless network card (NIC), by mobile data network visit Internet, no matter be 3GPP or 3GPP2, their defined core networks finally will be full distributed, all-IP multi-media network architectures.No matter adopt which kind of radio network technique, their technology evolution direction will be: between source and purpose that information of mobile terminal exchanges, all to handle with a kind of mode, IP then is this unitized technology platform from start to finish for speech and data.The core net of wireless mobile cellular network adopts traditional wired SDH technology, based on key SDH technology, adopt advanced GFP, VCAT and LCAS technology, merge ethernet switch technology and ATM switching technology, realize the comprehensive transmission of TDM business, Ethernet service and ATM business.Can rely on this technology that the SDH network is extended to any direction, therefore, network media phone set terminal can also connect 3G wireless transceiver RNT by USB interface, inserts wireless IP-V4 or IP-V6 communication network, visit Internet (Figure 10-12).
The direction of 3GPP, 3GPP2 standard determines that all IPv6 is the developing direction of the network carrying, service application.Inevitable requirement operator is at the first stage of construction of 3G network like this, and all network elements end to end of 3G system are taken into full account the tenability of IPv6 or implementation, the application model of smooth evolution.Comprise that two stack UE are connected in the network of IPv4, IPv6, the UE of IPv4 is connected on the node of IPv4 by the IPv6 network, the UE of IPv6 is connected to by the IPv4 network on the node of IPv6, and perhaps IPv4/IPv6UE is connected to the first-class application model of node of IPv6/IPV4.It is pointed out that the time IP bearer network scheme that 3G packet gateway equipment reaches to RAN, CN all fully guarantees to provide solution to following IPv6 application towards the 3G networking.Comprise two stack supports (termination PDP, PPP also provides the connection of two kinds of IPv4, IPv6 network) of Packet Based Network GGSN/PDSN, and the various IPv4 carrying IPv6 of IP bearer network use, IPv6 carrying IPv4 uses, or pure IPv6 networking.
Wireless communication networks just from being main to being main the transformation with the software function with the hardware device, is pursued cell design and excellent interface definition with platform independence at present.Extensively adopt component software technology based on flexible bus, based on the client/server configuration technology of component technology with based on the technology such as service management, via configuration, system monitoring and network recovery function of soft definition, by each functional module of methods such as software arrangements, data setting and software reconfiguration definition wireless communication system, to support the operation of multi-protocol stack, multiple business software.The modularized design of network media phone set terminal adaptable interface Network Based, can increase easily the new function of the access of Wireless Communication Equipment by assembling or expansion connection, realize the plug and play of middleware, increase flexibility, the adaptability of network media phone set terminal thus, improve the full availability of system resource, and make network media phone set terminal system possess the characteristic of soft capacity.
Part bilingual: A/L audio frequency/logic card, the BIC Bus Interface Chip, BDR receives data-signal, BDX sends data-signal, the CONNECTOR connector, the choosing of CS RAM random asccess memory sheet, the choosing of CS ROM read-only memory sheet, the CDMA code division multiple access, the FDMA frequency division multiple access, the MS travelling carriage, NC does not connect, empty pin, the PCM pulse code modulation, the PIN PIN, the PCN personal communication network, Radio Network Terminal wireless network terminal, RX receives, RX OUT receives output.
Claims (10)
1, the method to set up of the radio network interface of network media phone set terminal, with network media phone set terminal as the basis of radio network interface, network media phone set terminal is provided with the IP phone module that the target called number is mapped as corresponding gateway ip address, the terminal complete machine is provided with pci bus, CPU, on pci bus, decode with the MPEG2-4 that supports Streaming Media, video encoding is handled, the multimedia processing module of A/D conversion, described multimedia processing module comprises voice/multimedia processor and DSP processing module, connect phone and audio-video signal media port at described voice/multimedia processor by the D/A conversion, it is characterized in that pci bus is provided with wireless network adaptable interface module or wireless adaptation interface module and local or wide area link block, employing is at the adaptable interface module of the wireless network access device interface characteristics extension of network adaptable interface module as network media phone set terminal, and described wireless network adaptable interface module is connected with the system bus of network media phone set terminal inside.
2, by the method to set up of the radio network interface of the described network media phone set terminal of claim 1, the wireless network applied environment that it is characterized in that described adaptable interface module map network medium phone set terminal, adopt the functional interface agreement of seriation, support by serial wireless network peripheral hardware access network medium phone set terminal.
3, by the method to set up of the radio network interface of the described network media phone set terminal of claim 1, it is characterized in that the adaptable interface module adopts general embedded interface, support communication means between processor in conjunction with adopting multiport memory, integrated by system bus and network media phone set terminal, after the startup, the adaptable interface module is finished initialization and data transmit-receive unloading task automatically under software-driven.
4, by the method to set up of the radio network interface of the described network media phone set terminal of claim 1, it is characterized in that the CPU of network media phone set terminal supports, support the radio access module of multi-protocols and the interface work of expansion by system bus.
5, by the method to set up of the radio network interface of the described network media phone set terminal of claim 1, it is characterized in that interface adopts multiport memory to support communication between processor, adopt the HCI interface to the transfer of data between the baseband processor, be connected with the communication universal serial bus with reflector with asynchronous receiver; Integrated memory and control logic, the shared central memory of access simultaneously; Each port has independently control, address and I/O pin, realizes independent, the asynchronous read and write operation of any position in the memory.
6, the device of the radio network interface of network media phone set terminal: its hardware circuit of Network adaptation interface module comprises the communication interface with network media phone set terminal system bus, it is characterized in that being provided with hardware interface with the peripheral hardware wireless communication controller, the interface of machine external bus Data Buffer Memory, described adaptable interface module is as the extension of network interface module of network media phone set terminal, the adaptable interface module comprises main control module and access module, main control module comprises CPU and bus interface circuit, and is connected with the internal system bus relevant position of network media phone set terminal; Access module adopts PC CARD (PCMCIA) access module, and network media phone set terminal is provided with the pc card slot of PCMCIA wireless adaptation interface module.
7, by the device of the radio network interface of the described network media phone set terminal of claim 6: it is characterized in that the wireless adaptation interface module comprises comprises the USB2.0 access module in the access module, network media phone set terminal is connected access of radio network by the PCMCIA access module with wireless receiving and dispatching peripheral hardware RNT; Or the adaptable interface module comprises and comprises bluetooth (Bluetooth) access module in the access module that with the mobile phone (MT) that has bluetooth (Bluetooth) communication function, network media phone set terminal inserts 2.5G-3G radio data network.
8, by the device of the radio network interface of the described network media phone set terminal of claim 6: it is characterized in that being provided with in the network media phone set terminal access module standard RJ-45 Network Interface Module and the serial wireless network MCU adaptable interface module of configuration.
9, by the device of the radio network interface of claim 6 or 8 described network media phone set terminals: it is characterized in that serial wireless network MCU adaptable interface module comprises a kind of in wireless Hub, radio access station, wireless bridge, wireless Modem and the wireless network card or several.
10, by the device of the radio network interface of claim 6 or 8 described network media phone set terminals: it is characterized in that main control module adopts dsp chip, drive with UART, by direct programming, realize the detection of transmission, radio communication peripheral hardware answer signal and the operating state of AT order to the master control module controls register.
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