CN101174958A - Code division multiple access modem with flexible networking mode - Google Patents
Code division multiple access modem with flexible networking mode Download PDFInfo
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- CN101174958A CN101174958A CNA200610117918XA CN200610117918A CN101174958A CN 101174958 A CN101174958 A CN 101174958A CN A200610117918X A CNA200610117918X A CN A200610117918XA CN 200610117918 A CN200610117918 A CN 200610117918A CN 101174958 A CN101174958 A CN 101174958A
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Abstract
A code division multiple access modem with flexible networking patterns comprising a main module, an antenna interface module, an Ethernet interface module and an asynchronous serial interface module which are electrically connected with the main module; the main module comprises a radio frequency circuit and a base band part which are electrically connected; the base band part comprises a power block, a digital processing block and a system connector which are electrically connected; the present invention provides the code division multiple access modem with flexible networking patterns; the modem is embedded with TCP/IP protocol stack and equipped with standard serial communication interface, the antenna interface and the Ethernet interface and are applicable to all devices with serial terminal; in this way, the terminal devices without TCP/IP processing are provided with radio communication capability.
Description
Technical field
The present invention relates generally to a kind of CDMA modems with flexible networking mode, is mainly used in the wireless data transmission business of CDMA network.
Background technology
Modem (modulator-demodulator) is the abbreviation of Modulator/DEModulator (modulator/demodulator).It is by modulation digital signal to be converted to analog signal at transmitting terminal, and is a kind of device of digital signal at receiving terminal again with analog signal conversion by demodulation.
Information in the computer is formed digital signal by " 0 " and " 1 ", and what pass in phone line can only be analog electrical signal.So, when two computers will carry out transfer of data by telephone wire (dialling up on the telephone), just need an equipment to be responsible for the conversion of digital-to-analogue such as us.This digital to analog converter is exactly Modem.Computer is converted to corresponding analog signal to digital signal by Modem earlier when sending data, this process is called " modulation ".Before the signal of ovennodulation is sent to another computer by telephone carrier, also to be responsible for analog signal is reduced to the digital signal of calculating function identification via recipient's Modem, this process is called " demodulation ".Digital-to-analogue conversion process by such one " modulation " and " demodulation " just, thus realized telecommunication between two computers.
Modal Modem is exactly the modulator-demodulator by the online of telephone wire dial mode.This network access is fewer for ISP and net user's initial investment, need not to transform circuit, installs also fairly simplely, and this mode is substantially all adopted in therefore early stage online.Popular along with broadband network, more high speed Modem (also being referred to as basic Modem) can more and more enter people's life.And the high speed modem of technical grade need be applied to occasion widely, and the device category of required connection is more, and the reliability requirement height is so have higher requirement to the development of modem.
CDMA is the abbreviation of code division multiple access (Code-Division Multiple Access) technology, it is a kind of advanced person's of in the digital mobile communication process, occurring in recent years radio spread spectrum communication technology, it can satisfy the high request of market to mobile communication volume and quality, have that availability of frequency spectrum height, speech quality are good, strong security, cutting off rate is low, electromagnetic radiation is little, capacity is big, cover characteristics such as wide, can reduce investment in a large number and cut operating costs.CDMA2000 is that the TIA normal structure is used in reference to the title for third generation CDMA.The TIA standard that is applicable to 3G CDMA is called IS-2000, and this technology itself is called as CDMA2000.The phase I of CDMA2000 is also referred to as 1x, and it can double its entire system capacity the communication common carrier that has existing IS-95 system, and data rate can be increased to up to 614kbps.
Nowadays the modulator-demodulator based on cdma network that occurs on the market can satisfy the application of general access network, but still abundant inadequately aspect interface.What have only has serial line interface and an antennal interface.Though it is this can satisfy certain application requirements, still perfect inadequately aspect flexible networking.The not embedding ICP/IP protocol stack that has has just limited not with the service of the terminal of ICP/IP protocol stack.
Summary of the invention
CDMA modems with flexible networking mode provided by the invention, embedded TCP/IP (transmission control protocol/Internet Protocol) protocol stack has the standard serial communication interface, antennal interface and Ethernet interface.Be applicable to the equipment of all band serial port terminals, for the terminal equipment that does not possess the ICP/IP protocol processing provides wireless communication ability.
In order to achieve the above object, the invention provides a kind of CDMA modems with flexible networking mode, comprise primary module, characteristics are, also comprise antenna interface module, ethernet interface module and the Asynchronous Serial Interface module of circuit connection primary module respectively;
Described primary module comprises radio circuit and the baseband portion that circuit connects;
Described radio circuit is supported the wireless communication standard of CDMA2000 network, by with the purpose that reaches with wireless communication that is connected of radio frequency interface and antennal interface, support the radio frequency of cdma network to receive and send (RX and TX) standard;
Described baseband portion comprises electric energy piece, digital signal processing module and the system connector that circuit connects;
Described electric energy piece is made up of several discrete adjusters, is the primary module power supply;
Described digital signal processing module is made up of digital processing chip and some memories;
Embedded Digital Signal Processing kernel in the described digital processing chip, make modulator-demodulator have speech recognition, voice record, compress speech, echo cancellation performance, support 16 flash memory and SRAM (static storage), support pure speech pattern and all radio configuration, support the high-speed data transfer of primary and backup channel, have general-purpose interface bus, has the microprocessor power-down mode, built-in house dog;
Described system connector has several pins, and being connected of primary module and other parts of modulator-demodulator is provided, and has the conversion input function of analog to digital signal, phonetic entry and output function;
Described antenna interface module is used for carrying out wireless connections with external network;
Described ethernet interface module supports the ethernet network of 10/100BaseT to connect;
Described Asynchronous Serial Interface module can link to each other with the terminal of no TCP/IP function, and the order that receiving terminal is sent is provided with and disposes modulator-demodulator;
CDMA modems with flexible networking mode provided by the invention has following function:
1, Ethernet is to the routing function of CDMA1X network: the Ethernet interface by modulator-demodulator connects internal lan network (LAN) and CDMA1X radio wide area network (WAN), by NAT (network address translation) technology, allow inner many IP (Internet Protocol) terminal equipments (as PC), by wave point and the GSM/GPRS network service of modem, share access internet/enterprise network simultaneously with the CDMA1X wireless mode;
2, serial ports is to the translation function of CDMA1X network: because CDMA1X is based on the network of ICP/IP protocol, the equipment that requires to insert must meet the TCP/IP standard, most of traditional data terminal equipments, as financial POS (electronics cash collecting system), monitoring collecting device RTU (RTU (remote terminal unit)) etc. do not possess the IP function, and they can be by many cdma modem equipment, insert the CDMA1X network by serial ports, realize the long distance wireless networking;
3, serial ports is to the ethernet network translation function: if same position has many wireless module cdma modems to dial up on the telephone simultaneously, may cause mutual competition network resource, thereby the online situation of difficult occur.Traditional non-IP terminal or the terminal that possesses the ICP/IP protocol function directly are converted to the network equipment with standard TCP/IP Ethernet (100BaseT) interface by the RS232 serial ports, allow the closer a plurality of terminals of physical location connect the cdma wireless network simultaneously, realize the bidirectional data transfers of terminal equipment and data center.Network has solved the situation that many serial port terminals of same position need be networked by CDMA simultaneously.
CDMA modems with flexible networking mode provided by the invention, networking mode is flexible, covers the efficient height, lower deployment cost is low, does not need the platform investment, and this equipment has built-in watchdog function, system never crashes, and the wireless routing function that this equipment is exclusive solves the function that the nearer terminal equipment of physical location is surfed the Net simultaneously, not only avoided interfering with each other of closely a plurality of GPRS Radio Links, the cost of also effectively having terminated an agreement, this modem feature is powerful, stability is high, can be applied in electric power, running water, the metering of fields such as natural gas table meter, also can realize measuring automatically reading, automatic gauge sends, teleprocessing, remote device monitoring, and security protection, vehicle scheduling, public's flow business, Business Processing automations etc. are any to be needed in the application scheme of unified management service terminal, can be widely used in finance, insurance, security, commercial, public security, traffic, the tax, meteorology, industry and fields such as oil.
Description of drawings
Fig. 1 is a kind of structural representation with CDMA modems of flexible networking mode provided by the invention.
Embodiment
Followingly specify a kind of better embodiment of the present invention according to Fig. 1:
As shown in Figure 1, the invention provides a kind of CDMA modems with flexible networking mode, comprise primary module 1, characteristics are, also comprise antenna interface module 2, ethernet interface module 3 and the Asynchronous Serial Interface module 4 of circuit connection primary module 1 respectively;
Described primary module 1 comprises radio circuit and the baseband portion that circuit connects;
Described radio circuit is supported the wireless communication standard of CDMA2000 network, by with the purpose that reaches with wireless communication that is connected of radio frequency interface and antennal interface, support the radio frequency of cdma network to receive and send (RX and TX) standard;
Described baseband portion comprises electric energy piece, digital signal processing module and the system connector that circuit connects;
Described electric energy piece is made up of several discrete adjusters, is the primary module power supply;
Described digital signal processing module is made up of digital processing chip and some memories;
Embedded Digital Signal Processing kernel in the described digital processing chip, make modulator-demodulator have speech recognition, voice record, compress speech, echo cancellation performance, support 16 flash memory and SRAM (static storage), support pure speech pattern and all radio configuration, support the high-speed data transfer of primary and backup channel, have general-purpose interface bus, has the microprocessor power-down mode, built-in house dog;
Described system connector has several pins, and being connected of primary module and other parts of modulator-demodulator is provided, and has the conversion input function of analog to digital signal, phonetic entry and output function;
Described antenna interface module 2 is used for carrying out wireless connections with external network;
Described ethernet interface module 3 supports the ethernet network of 10/100BaseT to connect;
Described Asynchronous Serial Interface module 4 can link to each other with the terminal of no TCP/IP function, and the order that receiving terminal is sent is provided with and disposes modulator-demodulator;
CDMA modems with flexible networking mode provided by the invention has following function:
1, Ethernet is to the routing function of CDMA1X network: the Ethernet interface by modulator-demodulator connects internal lan network (LAN) and CDMA1X radio wide area network (WAN), by NAT (network address translation) technology, allow inner many IP (Internet Protocol) terminal equipments (as PC), by wave point and the GSM/GPRS network service of modem, share access internet/enterprise network simultaneously with the CDMA1X wireless mode;
2, serial ports is to the translation function of CDMA1X network: because CDMA1X is based on the network of ICP/IP protocol, the equipment that requires to insert must meet the TCP/IP standard, most of traditional data terminal equipments, as financial POS (electronics cash collecting system), monitoring collecting device RTU (RTU (remote terminal unit)) etc. do not possess the IP function, and they can be by many cdma modem equipment, insert the CDMA1X network by serial ports, realize the long distance wireless networking;
3, serial ports is to the ethernet network translation function: if same position has many wireless module cdma modems to dial up on the telephone simultaneously, may cause mutual competition network resource, thereby the online situation of difficult occur.Traditional non-IP terminal or the terminal that possesses the ICP/IP protocol function directly are converted to the network equipment with standard TCP/IP Ethernet (100BaseT) interface by the RS232 serial ports, allow the closer a plurality of terminals of physical location connect the cdma wireless network simultaneously, realize the bidirectional data transfers of terminal equipment and data center.Network has solved the situation that many serial port terminals of same position need be networked by CDMA simultaneously.
CDMA modems with flexible networking mode provided by the invention, networking mode is flexible, covers the efficient height, lower deployment cost is low, does not need the platform investment, and this equipment has built-in watchdog function, system never crashes, and the wireless routing function that this equipment is exclusive solves the function that the nearer terminal equipment of physical location is surfed the Net simultaneously, not only avoided interfering with each other of closely a plurality of GPRS Radio Links, the cost of also effectively having terminated an agreement, this modem feature is powerful, stability is high, can be applied in electric power, running water, the metering of fields such as natural gas table meter, also can realize measuring automatically reading, automatic gauge sends, teleprocessing, remote device monitoring, and security protection, vehicle scheduling, public's flow business, Business Processing automations etc. are any to be needed in the application scheme of unified management service terminal, can be widely used in finance, insurance, security, commercial, public security, traffic, the tax, meteorology, industry and fields such as oil.
Claims (4)
1. CDMA modems with flexible networking mode, it is characterized in that, comprise primary module (1), characteristics are, also comprise antenna interface module (2), ethernet interface module (3) and the Asynchronous Serial Interface module (4) of circuit connection primary module (1) respectively;
Described primary module (1) comprises radio circuit and the baseband portion that circuit connects;
Described radio circuit connects radio frequency interface and antennal interface;
Described baseband portion comprises electric energy piece, digital signal processing module and the system connector that circuit connects.
2. the modulator-demodulator based on global mobile communication system/general grouping wireless service as claimed in claim 1 is characterized in that, described electric energy piece is made up of several discrete adjusters.
3. the modulator-demodulator based on global mobile communication system/general grouping wireless service as claimed in claim 1 is characterized in that, described digital signal processing module is made up of digital processing chip and some memories.
4. the modulator-demodulator based on global mobile communication system/general grouping wireless service as claimed in claim 1 is characterized in that described system connector has several pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610117918XA CN101174958A (en) | 2006-11-03 | 2006-11-03 | Code division multiple access modem with flexible networking mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610117918XA CN101174958A (en) | 2006-11-03 | 2006-11-03 | Code division multiple access modem with flexible networking mode |
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| Publication Number | Publication Date |
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| CN101174958A true CN101174958A (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200610117918XA Pending CN101174958A (en) | 2006-11-03 | 2006-11-03 | Code division multiple access modem with flexible networking mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123216A (en) * | 2010-01-11 | 2011-07-13 | 领特德国有限公司 | Dynamic multicode home networking modem device |
| CN105657338A (en) * | 2014-12-02 | 2016-06-08 | 深圳大学 | Internet based remote mobile terminal control system and control method |
-
2006
- 2006-11-03 CN CNA200610117918XA patent/CN101174958A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123216A (en) * | 2010-01-11 | 2011-07-13 | 领特德国有限公司 | Dynamic multicode home networking modem device |
| CN102123216B (en) * | 2010-01-11 | 2015-11-25 | 领特德国有限公司 | Dynamic multicode home networking modem device |
| CN105657338A (en) * | 2014-12-02 | 2016-06-08 | 深圳大学 | Internet based remote mobile terminal control system and control method |
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Open date: 20080507 |