CN2529464Y

CN2529464Y - Blue tooth net gate base on ICP/IP protocol

Info

Publication number: CN2529464Y
Application number: CN 02222141
Authority: CN
Inventors: 金纯�
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-05
Filing date: 2002-04-05
Publication date: 2003-01-01
Anticipated expiration: 2012-04-05

Abstract

The utility model relates to a bue tooth net gate base on ICP/IP protocol, comprising a CPU and a blue tooth module. The utility model is characterized in that the CTS terminal(BLU-CTS) and the TXD terminal(BLU-TXD) of the blue tooth module(U2) are respectively connected with the CTS(CPU-CTS) terminal and the RXD(CPU-RXD) of the CPU(U4) through a level switching circuit(U3). The TXD( CPU-TXD) and the CTS(CPU-CTS) of the CPU are respectively connected with the RXD(BLU-RXD) and the RTS(BLU-RTS) of the blue tooth module through the level switching circuit. The CPU is connected with an EMS memory(U7), an address latch(U6), and the data end and the address end of a network chip(U5) which has a net interface(U8) through a data bus(A) and an address bus(B).

Description

A kind of Bluetooth gateway based on ICP/IP protocol

(1), technical field

The utility model relates to the application of bluetooth short-distance wireless mechanics of communication.Specifically be a kind of, the gateway apparatus of Bluetooth terminal wireless access Ethernet (Ethernet) is provided based on the Bluetooth wireless transmission agreement.

(2), technical background

Existing gateway mainly is divided into wired and wireless two kinds, and wired mode is because of the mixed and disorderly dumb trend that is replaced by wireless network that faces of its wiring.In wireless mode, mainly contain modes such as 802.1x standard, traditional microwave, infrared ray, laser.Bluetooth approach is different from aforesaid way, mainly shows: bluetooth operating distance is short, work centre frequency height, and volume of transmitted data is big, in effective range, is better than other wireless network connecting mode.Along with the development of technology, bluetooth equipment will be popularized in each family, how connect and the remote control home electrical appliance, and Bluetooth gateway has proposed solution to this, realize the mutual conversion and the transmission of blue teeth wireless data and cable LAN data.

BLUEPAC (BLUEtoothPublic Access) network that basic way is to use the interconnected bluetooth equipment of IP agreement to form enters the Internet by IP-based Bluetooth gateway then.And this mode will take a lot of resources, and each bluetooth equipment all must occupy an independently IP, and has ICP/IP protocol.Simultaneously, when setting up BLUEPAC, also need equipment such as bluetooth base station, make cost too high.It is bigger generally to be suitable for data volume, and application distributed more widely.Through investigation, existing external existing 3COM Corp. releases two blue teeth wireless network interface card, and the PC Card interface product that adopts USB interface and notebook computer to use respectively adopts this mode.Its shortcoming one is that a network interface card only provides client's microcomputer to insert internet function, and the microcomputer that still needs to link to each other with the Internet in addition provides access service; The 2nd, the scope of application is narrower, can only satisfy the access of conventional equipments such as PC or notebook computer, can not provide any Bluetooth terminal product, as the networking demand of family expenses bluetooth equipments such as printer, refrigerator, air-conditioning and Industrial Control Computer.

Domestic have the ZHBG2100 Bluetooth gateway product of Zhenghua Electronic High-Tech. Engineering Co., Ltd., Shanghai and Shanghai Post ﹠ Telecommunications Appliances Industry Co cooperative development to can be used as PPP (Peer-Peer Protocol, end-to-end protocol) server, but must be with an other high-performance computer as main control system, the support of talk various network protocols interface is provided, and the realization of variety of protocol is finished by main control system and related software thereof.Existing relevant patent is the patent 00238037.4 of Automation Engineering Research ﹠ Mfg. Center, Guangdong Provincial Academy of S, but its application is that PS2000Internet network protocol module function is limited, can't adapt to more generally demand of procotol.

(3), Fa Ming content

Technical problem to be solved in the utility model is: provide a kind of network insertion and bluetooth access are integrated, need not the universal blue tooth gateway that microcomputer is supported.By this device, bluetooth equipment just can be set up into a pico-network, and mutual communication, also can be linked in the computer network by gateway simultaneously.Because gateway self has been realized ICP/IP protocol, therefore, the bluetooth equipment that is linked into computer network will only take a tcp port, have ICP/IP protocol and need not self.On the internet, IP and port numbers by gateway just can identify this equipment uniquely.Therefore, the shared resource of this equipment is very little.Networking is also very flexible, is used in establishment pico-network among a small circle and uses.

The technical scheme in the invention for solving the above technical problem is such: promptly a kind of Bluetooth gateway based on ICP/IP protocol, comprise central processing unit, bluetooth module, wherein, the signal acceptance and the transmitting terminal of bluetooth module are connected with antenna, it is characterized in that: the bluetooth of bluetooth module sends the request port and is connected with the serial interface receiving end with the transmission request end of central processing unit respectively by level shifting circuit with bluetooth serial transmitting terminal; The serial transmitting terminal of central processing unit allows end to be connected with the serial interface receiving end of bluetooth module with receiving with the reception request end respectively by level shifting circuit; Its data/address bus that passes through of central processing unit is connected with internal storage location, address latch, network card chip data terminal and address port with address bus.

The utility model is with central processing unit, Ethernet card, all integrate the formation gateway together with blue tooth interface module etc., can realize the conversion of Bluetooth protocol and ICP/IP protocol, the bluetooth equipment of finishing bluetooth equipment with ICP/IP protocol and no TCP/IP is simultaneously by a gateway access network, and exchanges data between netting.Gateway itself has the realization function of TCP/IP, ARP, udp protocol, need not any external equipment support, directly connect this network interface card, just can make 7 and 7, the access service to the Internet of complete bluetooth equipment is provided with interior bluetooth equipment online by the Ethernet netting twine.

(4), the description of the drawings

Accompanying drawing is an electrical block diagram of the present utility model.

U1-antenna as shown in the figure, U2-bluetooth module, U3-level shifting circuit, U4-central processor CPU, U5-network card chip, U6-address latch, U7-data storage, U8-finite net interface.

Five), embodiment

A specific embodiment that provides below in conjunction with accompanying drawing is further described the utility model.

Referring to accompanying drawing: Bluetooth gateway as shown in the figure based on ICP/IP protocol, comprise central processing unit U4, bluetooth module U2, wherein, the signal acceptance of bluetooth module and transmitting terminal are connected with antenna U1, it is characterized in that: the bluetooth of bluetooth module U2 sends request port BLU-CTS and is connected with serial interface receiving end CPU-RXD with the transmission request end CPU-CTS of central processing unit U4 respectively by level shifting circuit U3 with bluetooth serial transmit port BLU-TXD; The serial transmitting terminal CPU-TXD of central processing unit allows end BLU-RTS to be connected with the serial interface receiving end BLU-RXD of bluetooth module U2 with receiving with reception request end CPU-CTS respectively by level shifting circuit U3; Central processing unit U4 is connected by its data/address bus A and address bus B and internal storage location U7, address latch U6 and the data terminal and the address port that have the network card chip U5 of gauze interface U8.

The network interface card of said structure carries out the data processing work principle: arbitrary bluetooth equipment is accepted antenna U1 by the Bluetooth transmission module with what data were sent to Bluetooth gateway, enter bluetooth module U2, if the Bluetooth operation order then U2 carry out immediately, be not sent to single-chip microcomputer U4, if need the user data of transmission, be the required 5V voltage of U4 with the 3.3V voltage transitions then through level shifting circuit U3, import U4 subsequently into, and write the data packet data storage U7 by U4, wait for next step processing.The responsible reception of the BLU_RXD of U2 end reaches bluetooth module U2 emission from the network data of the CPU_TXD port of U4 in this process, the initialization of the BLU_RTS end control U2 of U2, the BLU_CTS end is responsible for flow control, and the BLU_TXD end receives packet with U2 and gives U4 processing by the UCPU_RXD end.

Central processing unit U4 mainly is responsible for the mutual conversion to the ICP/IP protocol data of scheduling and management and Bluetooth protocol data.It is by management and distribution to internal storage location U7, comprise network interface card U5 the MAC layer the Data Receiving buffer queue and send the Data Receiving buffer queue of buffer queue, bluetooth module and send the receiving cache queue of buffer queue, TCP/IP packet and send buffer queue, carry out segmentation, scheduling and the encapsulation of data.

After U4 handles, send the action command of U2 or U5 by U4, thereby realize that the Bluetooth protocol data arrive the conversion of Bluetooth protocol data to ICP/IP protocol data or ICP/IP protocol data.The function of address latch U6 is by data/address bus and the outer addressing of the multiplexing realization sheet of address bus, enlarges available memory space.Antenna U1 is the communication port between bluetooth equipment, and wired network interface U8 is the passage of Bluetooth gateway and local area network (LAN) or internet communication.

In the embodiment that accompanying drawing provides, U2 adopts the ROK007 bluetooth module of ERICSSON company, and U3 is that model is the level shifting circuit of 74HC4066, U4 is the 89C58 single-chip microcomputer, U5 is that model is the network interface card of RTL8019AS, and U6 is the 74CH373 address latch, and U7 is the 62256RAM memory.

Claims

1, a kind of Bluetooth gateway based on ICP/IP protocol, comprise central processing unit (U4), bluetooth module (U2), wherein, the signal acceptance of bluetooth module and transmitting terminal are connected with antenna (U1), it is characterized in that: the bluetooth of bluetooth module (U2) sends request port (BLU-CTS) and is connected with serial interface receiving end (CPU-RXD) with the transmission request end (CPU-CTS) of central processing unit (U4) respectively by level shifting circuit (U3) with bluetooth serial transmit port (BLU-TXD); The serial transmitting terminal (CPU-TXD) of central processing unit allows end (BLU-RTS) to be connected with the serial interface receiving end (BLU-RXD) of bluetooth module (U2) with receiving with reception request end (CPU-CTS) respectively by level shifting circuit (U3); Central processing unit (U4) is connected by its data/address bus (A) and address bus (B) and internal storage location (U7), address latch (U6) and the data terminal and the address port that have the network card chip (U5) of gauze interface (U8).