CN201114158Y - Modem - Google Patents

Abstract

The utility model provides a modem, comprising a baseband processing module, a power management module connected with the baseband processing module, a power module connected with the power management module and a local wireless connection module connected with the baseband processing module. The power module is used to supply power for the modem; the local wireless connection module is used to supply the local wireless connection with a user terminal for the baseband processing module.

Description

A kind of modulator-demodulator

Technical field

The utility model relates to the communication equipment manufacturing technical field, particularly a kind of modulator-demodulator.

Background technology

Along with the technical development and the market demand, cellular wireless technologies is adding data communication function the earliest gradually on the basis of voice communication, as based on GSM (Global System for MobileCommunications, global system for mobile communications) standard evolution and GPRS (the General PacketRadio Service that comes, GPRS), EDGE (EnhancedDataratefor GSM Evolution improves data transfer rate GSM service) standard.In 3G (Third Generation, the third generation digital communication) epoch, data communication has become the major function of cellular network.

The computer-oriented user has occurred utilizing cellular network technologies to visit the special equipment of Internet.The PCMCIA of Chu Xianing (Personal Computer Memory Card International Association the earliest, PC RAM (random access memory) card international federation) card form equipment is called wireless data card, and the external device that utilizes USB (Universal Serial Bus, USB) interface to connect computer of up-to-date appearance is commonly referred to as radio modem.They can pass through GPRS, EDGE, CDMA (Code DivisionMultiple Access, code division multiple access), EVDO (evolution-data optimized, the data optimization upgraded version), UMTS (Universal Mobile Telecommunication System, universal mobile telecommunications system), HSPA (High Speed Downlink Package Access, high-speed downlink packet inserts) and up-to-date WiMAX (Worldwide Interoperability for Microwave Access, micro-wave access global inter communication) technology, for computer provides IP (Internet Protocol, Internet protocol) data communication function makes the computer user can mobile access Internet.

As shown in Figure 1, be prior art radio modem structure chart.Comprise baseband processing module, radio-frequency module, memory module and power management module, wherein baseband processing module is a core component, use the similar of baseband processing module with general mobile phone, wherein CPU (Central Processing Unit, central processing unit) finishes the running software and the management of entire chip.Radio circuit is used to finish the transmitting-receiving of wireless communication RF signal to be handled, comprise reception, transmission, on/down-conversion, demodulation and signal amplification work.Memory is mainly used in to be used and the storage of protocol stack program, and the SDRAM (Synchronous Dynamic random access memory, synchronous DRAM) during operation, belongs to the cooperation baseband processor and moves necessary peripheral chip.Power supply chip is then finished work such as the management, voltage transformation of the required power supply of all chips.

The radio modem of prior art is connected by USB interface with the interface of user terminal (computer), can be the standard USB interface that is integrated on the modulator-demodulator, also can be the mini USB interface that needs other USB line to connect.This USB interface not only provides data path for radio modem and computer, and also supply access is provided is the responsibility of radio modem power supply in order to bear.

The shortcoming of prior art is: radio modem and computer need link together by USB interface, and this USB interface provides supply access and data path for radio modem.Therefore thisly define radio modem by USB line ways of connecting and can only closely use with computer.If when indoor use, computer position wireless signal stopped, and radio modem since the restriction of USB connecting line also must be arranged near the computer, thereby have a strong impact on the radio modem operate as normal; And in narrow and small crowded environment (as railway carriage etc.), radio modem can be difficult to put and easily cause accidental damage.Therefore, above-mentionedly can bring some inconvenience and limit to the user by the USB ways of connecting.

The utility model content

Main purpose of the present utility model provides a kind of modulator-demodulator, causes user's use inconvenience and uses restriction by the USB connected mode thereby solve in the prior art.

The utility model provides a kind of modulator-demodulator, comprise baseband processing module, with the power management module that links to each other with described baseband processing module, comprise that also power module that links to each other with described power management module and the local wireless link block that links to each other with described baseband processing module, described power module are used to described modulator-demodulator power supply; Described local wireless link block is used to described baseband processing module to provide with the local wireless of user terminal to be connected.

Compared with prior art, the utlity model has following advantage: by increasing local wireless link block and power module, can make modulator-demodulator and be similar between the user terminal of computer and realize wireless connections, be not subjected to the restriction of physical connection line (as power line or data wire) in use, use convenient flexibly, improve user satisfaction.

Description of drawings

Fig. 1 is a prior art radio modem schematic diagram;

Fig. 2 is the structure chart of embodiment one of the present utility model;

Fig. 3 is the structure chart of embodiment two of the present utility model;

Fig. 4 is the structure chart of embodiment three of the present utility model.

Embodiment

Below in conjunction with figure and embodiment, embodiment of the present utility model is described in further detail:

As shown in Figure 2, structure chart for the utility model embodiment one, wherein illustrated modulator-demodulator of the present utility model is a radio modem, yet the utility model is not limited in the improvement to radio modem, do not provide the modulator-demodulator of network wireless access function also can realize being connected with the local wireless of user terminal (the intelligent subscriber terminal of function of surfing the Net is provided as computer, notebook etc.) by the utility model, it is convenient flexible that it is used.

This modulator-demodulator comprises baseband processing module 1, with the power management module 2 that links to each other with baseband processing module 1, also comprise power module 3 that links to each other with power management module 2 and the local wireless link block 4 that links to each other with baseband processing module 1, wherein, power module 3 is used to the modulator-demodulator power supply; Local wireless link block 4 is used to baseband processing module to provide with the local wireless of user terminal to be connected, to replace USB line of the prior art, for modulator-demodulator and computer provide data path.This modulator-demodulator also comprises radio-frequency module 5 and memory module 6, radio-frequency module 5 is used to realize the wireless telecommunications of computer and the Internet, finish the transmitting-receiving of wireless communication RF signal and handle, comprise reception, transmission, on/down-conversion, demodulation and signal amplification work.Memory module 6 is used to use the storage with the protocol stack program.

Wherein, power module 3 is specially battery, when being used for modulator-demodulator and not having line fully and work alone, is described modulator-demodulator power supply.

Local wireless link block 4 links to each other with baseband processing module 1 and is specially: local wireless link block 4 is connected with the peripheral interface circuit of baseband processing module 1.Wherein, wireless connections module 4 includes but not limited to: short-distance wireless access technologies such as WiFi (Wireless Fidelity, Wireless Fidelity), bluetooth, Zigbee, UWB (Ultra Wideband, ultrawideband) or Wireless USB.

Wherein, preferably, original USB interface also can keep in the modulator-demodulator, can be the selection that the user provides multiple realization modulator-demodulator to be connected with computer, increases the user and uses flexibility.

The utility model also need then increase the driving and the administration module of local wireless link block aspect software simultaneously, and relevant control module is to support user's operation.Wherein, the driver of local wireless link block need be corresponding with the local wireless access technology of its selection.

As shown in table 1 below:

Increased local wireless in the hardware driving content newly and inserted driver module, the usb protocol stack is used for wired connection, and local wireless access control hypervisor, modem application program are used to cooperate baseband processing module to realize wireless connections.

By the above-mentioned modulator-demodulator of the utility model, make it when work, just need not to carry out wired connection (data wire or power line) with computer, provide power supply by the power module that increases for modulator-demodulator, provide wireless data pathway by the local wireless link block that increases for modulator-demodulator and computer, thereby modulator-demodulator and computer can be selected more suitable separately position, and can effectively alleviate computer interface pressure, for the user provides great facility.

As shown in Figure 3, be the structure chart of the utility model embodiment two, local wireless link block 4 is specially WiFi module 40 described in this embodiment, and power module 3 is specially AC/DC modular converter 31.AC/DC modular converter 31 (moves and carries for nomadic, the fixing use) user, as long as insert AC power supplies, then the AC AC power of Cha Ruing converts the DC DC power supply to, need not to consider the restriction of power module capacity, the operating time of modulator-demodulator can infinitely prolong, WiFi module 40 therefore also for a long time operate as normal provide wireless data pathway with computer for modulator-demodulator.

Yet need to prove that embedding AC/DC modular converter 31 in power module 3 only is a kind of implementation of the present utility model, AC/DC modular converter 31 can also be made external annex, can make modulator-demodulator smaller and more exquisite like this, is easy to carry.

By the foregoing description, the utility model not only can make modulator-demodulator and computer carry out local wireless communication, and the replacing by AC power supplies, and the operating time of modulator-demodulator is infinitely prolonged, and further facilitates for the user.

As shown in Figure 4, structure chart for the utility model embodiment three, this embodiment can be on the basis of embodiment one and embodiment two, by in local wireless link block 4, increasing wireless route submodule 401, specifically can be increases wireless route submodule 401 in WiFi module 40, thereby makes this modulator-demodulator can support many computers to use simultaneously.For example a modulator-demodulator with wireless route submodule can be set in a room area, provide service on net within doors many computers by this modulator-demodulator.

Equally, the wireless route submodule 401 of operation also need add wireless route submodule agreement, thereby realize its routing function in original system protocol on baseband processing module 1.

Add the system framework (is example with the WiFi module) as shown in table 2 below after the wireless route submodule agreement:

By the foregoing description, the utility model not only can provide with the local wireless of computer and be connected, but also can pass through the wireless routing function of increase, thereby can support many computers to use same modulator-demodulator access network.

Local wireless link block and the power module of the utility model by increasing, can make modulator-demodulator and be similar between the user terminal of computer and realize wireless connections, be not subjected to the restriction of physical connection line (as power line or data wire) in use, use convenient flexibly, improve user satisfaction.And the utility model also can infinitely prolong its operating time by the replacing of AC power supplies, and the wireless routing function by increasing, and can support many computers to use same modulator-demodulator access network.

More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.

Claims (8)

1, a kind of modulator-demodulator, comprise baseband processing module, with the power management module that links to each other with described baseband processing module, it is characterized in that, comprise that also power module that links to each other with described power management module and the local wireless link block that links to each other with described baseband processing module, described power module are used for power supply; Described local wireless link block is used for being connected with the local wireless of user terminal.

2, modulator-demodulator according to claim 1 is characterized in that, also comprises the general-purpose serial bus USB module that is connected with described baseband processing module, is used for carrying out wired connection with described user terminal.

3, modulator-demodulator as claimed in claim 1 or 2 is characterized in that described power module is a battery, is used for power supply when not having line fully and work alone.

4, modulator-demodulator as claimed in claim 1 or 2 is characterized in that described power module is the AC/DC modular converter, is used for the AC AC power is converted to the DC power supply, is used for power supply.

5, as modulator-demodulator as described in the claim 4, it is characterized in that, also comprise the radio-frequency module that links to each other with described baseband processing module, be used to realize the wireless telecommunications of described user terminal and network.

6, modulator-demodulator according to claim 1 is characterized in that described local wireless link block is wireless WiFi module, bluetooth, Zigbee, ultrawideband UWB or Wireless USB.

7, as modulator-demodulator as described in the claim 6, it is characterized in that described WiFi module comprises wireless route submodule, be used to support many user terminals to use described modulator-demodulator simultaneously.

8, modulator-demodulator according to claim 1 is characterized in that described local wireless link block is connected with the peripheral interface circuit of described baseband processing module.

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