CN202143065U - Heterogeneous wireless network transmission system based on Bluetooth and ZigBee - Google Patents
Heterogeneous wireless network transmission system based on Bluetooth and ZigBee Download PDFInfo
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- CN202143065U CN202143065U CN201120265717U CN201120265717U CN202143065U CN 202143065 U CN202143065 U CN 202143065U CN 201120265717 U CN201120265717 U CN 201120265717U CN 201120265717 U CN201120265717 U CN 201120265717U CN 202143065 U CN202143065 U CN 202143065U
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Abstract
The utility model discloses a heterogeneous wireless network transmission system based on Bluetooth and ZigBee, comprising a transmitting terminal system and a receiving terminal system; the transmitting terminal system comprises a transmitting gateway and a Bluetooth transmitting module; the Bluetooth transmitting module is used for transmitting emergency communication data to the gateway; the transmitting gateway comprises a configuration control module, a serial port forwarding module, a ZigBee initialization module, a serial port monitoring module, a data processing module and a data transmitting module; the receiving terminal system comprises a receiving gateway and a Bluetooth data receiving module; the receiving gateway comprises a ZigBee packet intercepting module, a data processing module, a serial port forwarding module, a configuration control module, a serial port monitoring module, a receiving processing module and a Bluetooth receiving module.
Description
Technical field
The utility model relates to a kind of heterogeneous wireless network transmission system based on bluetooth, ZigBee, belongs to wireless communication technology field.
Background technology
The wireless communication technology develop rapidly; The wireless network of many novel different networking technologys of employing such as wireless lan (wlan), WiMAX, Wi-Fi, Wireless Mesh network (WMN), 3G and B3G mobile communications network occurs, brought deep reform for people's work and life style.But some restriction of these wireless networks owing to technical elements; Some is because communication equipment is very expensive; Some then receives the constraint of infrastructure such as base station and mobile switching centre, for some special occasions, like the area of battlefield, transmission disaster; These in advance deployment base facility or infrastructure destroyed, make these wireless networks lose its effect.
In current mobile radio communication apparatus, equipment such as mobile phone, notebook computer, wireless headset, PDA etc. with Bluetooth function have been common thing.Now, make a general survey of mobile phone market, almost 70% mobile phone has all had Bluetooth function, famous cell phone manufacturer even also begin to have added Bluetooth function on the mobile phone at a low price at the part low side of this year issue, and bluetooth has spread in the middle of our life
[8]But because the restriction (being generally 10 meters) of bluetooth communication distance makes bluetooth communication only can among a small circle, work.
But because bluetooth and ZigBee are two kinds of different protocol standards, bluetooth equipment can not with the direct communication of ZigBee equipment.When these two kinds of equipment hope to set up communication, just need protocol conversion based on the equipment of these two kinds of technology.And in existing wireless communication protocol conversion equipment, also do not have blue Tooth ZigBee gateway, making at present also can't direct communication between these two kinds of equipment.
When the burst fire-disaster incident took place, the communications infrastructure major part in the disaster area was destroyed.At this moment a large amount of cell phone apparatus is distributing in the disaster area; But because the foundation-free facility is supported; Telephony feature in the mobile phone is lost; Again since the WiFi function in the mobile phone at home crudely-made articles obtained just that Ministry of Industry and Information is with good conditionsi and lifted a ban (all mobile phones of being furnished with the own wireless standard WAPI module of China just can built-in WiFi functions and obtained the permission that networks), the mobile phone that has the WiFi function among the cellphone subscriber is minority just also.At this moment, the Bluetooth function in the mobile phone becomes the important means of carrying out information interchange between the people of disaster area.The ZigBee equipment that is widely used in disaster relief; Cheap, low in energy consumption based on it, can dispose on a large scale and in communication process, not have characteristics such as conflict to the disaster area through the mode of disposing in advance and shedding afterwards with blueteeth network, the ZigBee radio network technique also becomes the important component part of heterogeneous wireless network transmission system among this paper.
The utility model content
The utility model technical problem to be solved is that the deficiency that is directed against prior art provides a kind of heterogeneous wireless network transmission system based on bluetooth, ZigBee.
A kind of heterogeneous wireless network transmission system based on bluetooth, ZigBee comprises transmitting terminal subsystem and receiving terminal subsystem; Said transmitting terminal subsystem comprises transmission gateway and bluetooth sending module, and the bluetooth sending module is used for sending the emergency communication data to sending gateway; Said transmission gateway comprises configuration control module, serial ports forwarding module, ZigBee initialization module, serial ports monitoring module, data processing module, data transmission blocks; Said receiving subsystem comprises reception gateway and blue-teeth data receiver module; Said reception gateway comprises ZigBee packet intercepting and capturing module, data processing module, serial ports forwarding module, configuration control module, serial ports monitoring module, receiving processing module, bluetooth sending module.
Based on characteristics such as can covering on a large scale of the popularization of bluetooth function device and ZigBee device node; When the emergency case generation, when the communications infrastructure is destroyed; Like 5.12 Wenchuan earthquakes etc.; The ZigBee communication network of any wide-area deployment combines after bluetooth communication network that can the disaster area is scattered and the calamity, sets up a needs disaster relief network that satisfies rescue personnel after the calamity fast.
Description of drawings
Fig. 1 bluetooth and ZigBee transmission system Organization Chart;
Fig. 2 sends the subsystem module design drawing;
Fig. 3 ZigBee command format;
Fig. 4 sends gateway text message forwarding process;
Fig. 5 ZigBee message transfer form;
Fig. 6 sends gateway forwards text flow chart;
Fig. 7 gateway picture file forwarding process figure;
Fig. 8 receiving subsystem modular design figure;
Fig. 9 protocol conversion gateway system assumption diagram;
Figure 10 intercepts and captures the module workflow diagram;
Figure 11 processing module workflow diagram;
Figure 12 text message receives flow chart;
Figure 13 text receives flow chart.
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
Embodiment 1
As shown in Figure 1; Heterogeneous wireless network transmission system framework based on bluetooth, ZigBee; Adopt the hierarchy design philosophy, the blueteeth network communication equipment is the superiors of transmission system communication, is responsible for the transmission and the reception of information as terminal equipment; The ZigBee network communication equipment is the bottom of transmission system communication; Be responsible for transmitting the message of bluetooth equipment mainly as routing device, ZigBee equipment also can be used as the transmitting terminal and the receiving terminal of information simultaneously, realizes the communication and the heat transfer agent collecting work of ZigBee equipment room.
On the upper strata of transmission system, intercom mutually through setting up piconet between the bluetooth equipment.Both can receive and dispatch Word message, text and picture file between the bluetooth equipment and also can transmit the communication data between bluetooth equipment.When needing communicate owing to communication distance limits in the time of can't communicating by letter between two piconets by the ZigBee network.
At the bottom of transmission system, numerous ZigBee equipment couple together all ZigBee equipment through setting up radio mesh network.ZigBee equipment both can have been transmitted the communication data of bluetooth equipment also can realize the information exchange between the ZigBee equipment, and the ZigBee network is mainly used in the data message of transmitting between bluetooth equipment in this article.
Bluetooth and ZigBee heterogeneous wireless network transmission system are divided into and send subsystem and receiving subsystem two parts.In general; Send subsystem responsible and bluetooth data packets is converted to the ZigBee data flow that can on the ZigBee communication link, transmit; Through ZigBee hardware transmitting apparatus the ZigBee data flow is sent then; Concerning the ZigBee link, realize sending the system parameters that also will consider link itself, like baud rate, check digit, data position of rest etc.; Receiving subsystem the work that will realize be an inverse process that sends subsystem relatively, at first need accomplish the whole process that the ZigBee data flow that arrives is filtered, the ZigBee data flow is reduced into bluetooth data packets and further bluetooth data packets is transmitted to the bluetooth equipment user.
Embodiment 2
Present embodiment provides a specific embodiments of sending subsystem, and it is as shown in Figure 2 to send subsystem, comprises sending gateway and bluetooth sending module, and the bluetooth sending module is used for sending the emergency communication data to sending gateway.System operators is utilized the bluetooth sending module to send gateway and near other bluetooth equipment nodes to system and is sent and comprise information such as text message, text and picture file.
Send gateway and comprise configuration control module, serial ports forwarding module, ZigBee initialization module, serial ports monitoring module, data processing module, data transmission blocks.
(1) configuration control module: send and to carry out data through serial ports between gateway upper level applications and the ZigBee bottom hardware and exchange; Send gateway and will bluetooth data packets be forwarded to bottom ZigBee equipment through serial ports, need carry out parameter configuration the employed serial ports of bottom ZigBee equipment.Such as; Whether the serial ports port numbers that ZigBee equipment uses be what, the data baud rate of sending, need inlet flow and output stream management, data to send and the data bit and the position of rest of reception, whether need parity check etc., and these Determination of Parameters all realize accomplishing through configuration control module.
(2) serial ports forwarding module: the blue-teeth data that the transmission gateway is received is surrounded by three types---text message, text and picture file; Send the gateway upper level applications according to the bluetooth data packets type identification; Call different serial ports and write function, the upper layer application data are sent to gateway bottom ZigBee equipment through serial ports.Carrying out to carry out parameter configuration to the serial ports of use ZigBee equipment before serial ports writes.
The serial ports forwarding module is mainly realized three functions, will be sent to ZigBee equipment bottom through serial ports from text message, text and the picture file that bluetooth equipment receives, thereby realizes this three kinds of data transmission on the ZigBee data link.To introduce in detail below and how transmit this three kinds of data.
(1) text message is transmitted
In the ZigBee network, when the ZigBee telegon sends instruction to ZigBee routing device or terminal equipment, transmission be 8 hexadecimal number instruction.As; When wanting to obtain the data that the remote equipment short address collects for light sensor on ' 0001 ' equipment; The hexadecimal instruction that only needs the ZigBee coordinator unit to send ' 0001474D ' to target ZigBee equipment, target ZigBee equipment can send the photosensitive data that it is gathered to coordinator unit through the ZigBee data link.Wherein preceding four ' 0001 ' of the hexadecimal instruction is the short address of target ZigBee equipment.If broadcasting, the address is ' FFFF '.Back four ' 474D ' command content of hexadecimal instruction for sending.Concrete command format of sending is as shown in Figure 3.
Simple based on ZigBee command format, be convenient to transmit the small data quantity data characteristic, transmit in the design in the text message of the utility model, utilize the director data form of ZigBee to carry out the forwarding of text message on the ZigBee link of bluetooth.Wherein preceding four of data still is the short address of target ZigBee equipment, back four text messages for transmitting.Because in the text message of bluetooth, have Chinese and English two kinds of characters, and English is to account for 2 hexadecimal number, Chinese then need take 4 hexadecimal numbers.Being convenient to distinguish the character information that receives for the ZigBee bottom is Chinese or English; Confusion reigned not when simultaneously also being messaging; Keep only receiving and dispatching an English character or Chinese character at every turn; The utility model adds a flag bit and representes that the content of back is an English character when transmitting English character in its front.As when sending English character ' a '; The hexadecimal instruction of sending is ' FFFF5861 '; Wherein ' FFFF ' is the broadcast address of equipment short address, and ' 58 ' is the hexadecimal representation of english information flag bit ' X ', ' 61 ' hexadecimal representation for the English alphabet ' a ' that will transmit.
It is as shown in Figure 4 to send gateway forwards bluetooth text message flow process.
Two equipment rooms need send gateway and carry out the situation that text message transmits and mainly contain following two kinds in the heterogeneous wireless network transmission system of this paper:
1) two bluetooth equipment apart from each others need carry out the mutual situation of text message
2) bluetooth equipment and ZigBee gateway device need carry out the mutual situation of text message
Because the bluetooth equipment of two apart from each others can't be known the other side's existence, bluetooth equipment also can't be known the short address of ZigBee gateway device simultaneously, so this transmission gateway is carrying out all adopting the forms of broadcasting to transmit when text message is transmitted.
(2) text is transmitted
In the ZigBee network, the maximum data packet of transmission is 127 bytes, and it mainly comprises PHY layer header, MAC layer header, NWK layer header, APS layer header, PAYLOAD and FCS.The detailed data message transfer form of ZigBee is as shown in Figure 5.
PHY layer header accounts for 6 byte datas in the ZigBee packet, and MAC layer header accounts for 23 byte datas, and NWK layer header accounts for 8 byte datas, and APS layer header accounts for 7 byte datas, and FCS accounts for 2 byte datas.Like this, the actual maximum load that can transmit is the data of 81 bytes in the ZigBee network.
Because the maximum data load of in the ZigBee transmission link, transmitting is 81 bytes; Simultaneously; The serial ports of ZigBee bottom can only read the data of fixed size when reading function at every turn from the serial ports reading of data; So regulation ZigBee data link can only be sent the ZigBee packet that data payload is 81 bytes among this paper.
Because the bluetooth text packet package size that will transmit is indefinite,, to carry out segmentation again greater than 81 bytes so will judge to the bluetooth text packet package size that will transmit.Will carry out byte less than the text packet package of 81 bytes fills.Filling character of adopting among this paper is ' ', for the packet package size less than the filling ' ' of 81 bytes to 81 bytes, receiving terminal gateway read data packet is during to ' ', the redundant data of expression back content need not to read again.
The detailed process that sends gateway forwards bluetooth text packets bag is as shown in Figure 6.
(3) picture file is transmitted
Picture file and text difference are that the content in the text all is visible, when transmitting, can read by content and transmit.And in picture file, comprise some invisible characters; When using content transmission method transmission picture file; Can't obtain and transmit for those invisible characters, can cause like this can't correctly reducing picture file because of lacking partial data at the receiving subsystem end.
For picture file also can be transmitted in the ZigBee data link; Adopt picture file indirect communication method in the present embodiment; Promptly before sending gateway forwards bluetooth picture packet data package; The picture file that will transmit earlier is kept at this locality and converts hexadecimal text to, and the hexadecimal text after will changing then sends to the reception gateway through the ZigBee data link; Reception gateway end in transmission system reverts back picture file with the hexadecimal text that receives again, and picture file is transmitted to purpose bluetooth users end through bluetooth data link.
Concrete treatment step is following:
A bluetooth picture file data bag arrives transmission system and sends gateway, sends gateway picture file is stored in this locality.
B will be stored in local picture file and convert the hexadecimal text to.
C sends the hexadecimal text after gateway sends conversion.
The idiographic flow that sends the gateway forwards picture file is as shown in Figure 7.
(3) ZigBee initialization module: be responsible for the ZigBee equipment that sends gateway is carried out initialization; Comprise system clock, storehouse, each hardware module of ZigBee chip, device mac address, application framework layer and ZigBee operation of equipment system etc.; Near the search whether available network being arranged then, is to network through telegon adding network or through existing node if any then selecting.As do not have available network, judge whether local device is full-function device, if not then waiting for.If full-function device, local device is set is network coordinator and carry out scan channel (comprising energy scan and active scan) and create a new network.
(4) serial ports is monitored module: whether responsible monitoring has data to send to bottom ZigBee equipment from the upper strata of sending gateway through serial ports; In case serial ports has data to arrive; ZigBee operation of equipment system will be automatically brought to self-defining data processing call back function, carries out self-defining operation.
(5) data processing module: receive from sending the gateway upper strata and send data, and carry out differentiating and processing according to the difference of data type through serial ports; Serial data to receiving obtains information such as ZigBee target device short address, data content and data length through the operation of logic OR and logical shift left.
(6) data transmission blocks: call ZigBee device drives interface, data are sent through ZigBee device hardware sending module; The process that data are sent is exactly the process that digital information is transformed into the link transmission signal.Through this process, data will be transmitted in the ZigBee link channel with the form of signal.
Embodiment 3
The specific embodiments of present embodiment decorum receiving subsystem, receiving subsystem comprise reception gateway and blue-teeth data receiver module.The blue-teeth data receiver module is used to receive from receiving the emergency communication data that the gateway data forwarding module is transmitted.
With reference to figure 8.
Receive gateway and comprise ZigBee packet intercepting and capturing module, data processing module, serial ports forwarding module, configuration control module, serial ports monitoring module, receiving processing module, bluetooth sending module.
(1) the ZigBee packet is intercepted and captured module: intercept and capture the ZigBee packet in ZigBee protocol stack network layer, and judge whether it is own or broadcast data frame according to destination address; In the header fields of ZigBee packet; The information such as actual source address and final purpose address that has comprised message; Can intercept and capture the ZigBee packet according to these information; The ZigBee bag that satisfies which kind of condition with decision can continue to transmit, and the ZigBee bag that does not satisfy condition is then abandoned.
(2) data processing module: the ZigBee packet of intercepting and capturing is carried out information category judge, and carry out corresponding data processing to different categorical datas; The classification of information mainly comprises text message, text and picture file etc.Owing to send gateway when transmitting blue-teeth data, be the packet of which kind of information type for distinguishing what transmit, when transmitting with the first byte data of ZigBee packet data load in the filling information type identification.Data processing module can judge which kind of type is the message in the load belong to according to this type field when the ZigBee packet that processing is intercepted and captured, use which kind of self-defining data to handle function with decision and receive processing.
(3) serial ports forwarding module: because of the upper strata that receives gateway with communicating through serial ports between the underlying device, the data after the serial ports forwarding module that receives gateway mainly is responsible for data processing module handled are uploaded to through serial ports and receive the gateway upper strata; Handle in the function at ZigBee protocol stack serial data, be provided with serial ports specially and write function, be responsible for the data of ZigBee equipment bottom are uploaded to reception gateway upper strata through serial ports, can utilize this function performance to realize the data forwarding of serial ports.
(4) configuration control module: the configuration control with sending gateway is the same, receives the employed serial ports of gateway bottom ZigBee equipment and also need carry out parameter configuration.Comprise the serial ports port numbers of use, baud rate, inlet flow and output stream management, the data transmission that data are sent and data bit and position of rest, the parity check etc. that receive, these Determination of Parameters all are to realize accomplishing through configuration control module.
(5) serial ports is monitored module: whether responsible monitoring has bottom data to reach the upper strata that receives gateway through serial ports, if any, then trigger events corresponding and handle function, with the storage that receives in the buffer memory array, for further processing.Before carrying out the serial ports monitoring, need to use configuration control module carry out parameter configuration to employed serial ports.
(6) receiving processing module: the data processing of being responsible for receiving in the buffer memory array becomes to be fit to the data mode that bluetooth equipment sends, for next step bluetooth sending module use; In data handling procedure, if receive be text message then can directly transmit through bluetooth equipment; If that receives is text then needs to preserve in this locality and then to transmit through bluetooth; If that receives is picture file then needs earlier it to be reduced to picture file and transmit through bluetooth equipment.
Receiving processing module mainly realizes being text message, text or picture file information from the emergency communication reduction of data that serial ports sends over, and for the bluetooth sending module it is transmitted to the purpose bluetooth nodes, comprises following subelement:
(a) text message receives processing unit
The text message data bag is after data processing module is handled; What on serial ports, transmit is the hexadecimal data of an English character or Chinese character; These hexadecimal datas will be converted to normal character data by the text message receiving processing module and be stored in the metadata cache array; Treat that the text message receiving processing module handles the hexadecimal text message of all arrivals; Give the bluetooth sending module with text message data buffer memory array, text message is transmitted to the bluetooth receiving software by the bluetooth sending module that receives gateway.
The idiographic flow that receiving processing module processing text message receives is shown in figure 12.
(b) text receives processing unit
The text packet can be sent to from serial ports after data processing module is handled and receive the gateway upper strata; When text receiving processing module during from the serial ports reading of data; Because the restriction of serial ports itself can only be obtained the data of a character at every turn, be to accomplish in two steps when sending text file and send gateway, at first the base attribute information of text is sent; The title, file suffixes and the file size that comprise file, the content information that secondly just sends text file.The text receiving processing module can't be distinguished the base attribute information that the information of receiving is text or the content information of text when receiving data like this.
In the utility model, the text receiving processing module designs when receiving text file information, an indexed variable ' change ' is set and it is initialized as ' 1 '.When its value was ' 1 ', what represent current reception was the base attribute information of text.When its value is ' 2 ', represent the content information of the text of current reception.Simultaneously, for ease of the conversion of ' change ' value, ZigBee equipment appends flag bit ' % ' in the back of base attribute information when the base attribute information that sends text file.When ZigBee equipment receives gateway when serial ports reads ' % ', the base attribute information of expression text has received and has finished, and can ' change ' value be revised as ' 2 '.Equally, ZigBee equipment sends gateway when the content information that sends text file, a last packet append at the back flag bit '! '.Receive gateway receive '! ' represent that the content information reception of text finishes, and can be revised as ' 1 ' with ' change ' value.
Consider the transmission system reliability of data transmission; The pattern that text among this paper and picture file all adopt storage to transmit designs; The text that promptly will transmit earlier at reception gateway end is stored in this locality, and then is transmitted to target bluetooth receiving node.
For the text that can will transmit is stored in the reception gateway local; The text receiving processing module is when receiving text file; Earlier the base attribute information with text receives, and utilizes the filename and the text of file suffixes in local content creating blank of text; Then, again the text content information that receives is write in the text of establishment, to reach the purpose of storage earlier; At last, call the text that data forwarding module will transmit and send to the bluetooth receiving software.
Text receiving processing module workflow is shown in figure 13.
(c) picture file message pick-up processing unit
(function of picture file message pick-up processing unit is described at the serial ports forwarding module that sends subsystem, is adapted to here now)
Picture file message pick-up processing unit becomes hexadecimal text with the information translation that receives, and converts the text that receives to picture file, transfers to the bluetooth sending module and sends to the blue-teeth data receiver module through Bluetooth link.
Concrete treatment step is following:
The a far-end receives the hexadecimal text that gateway receives and storage sends over.
B converts the hexadecimal text of storage to picture file.
C calls the picture file that receives gateway bluetooth equipment picture router forwarding conversion.
The idiographic flow that receives the gateway forwards picture file is as shown in Figure 7.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection range of the utility model accompanying claims according to above-mentioned explanation.
Claims (1)
1. the heterogeneous wireless network transmission system based on bluetooth, ZigBee is characterized in that, comprises transmitting terminal subsystem and receiving terminal subsystem; Said transmitting terminal subsystem comprises transmission gateway and bluetooth sending module, and the bluetooth sending module is used for sending the emergency communication data to sending gateway; Said transmission gateway comprises configuration control module, serial ports forwarding module, ZigBee initialization module, serial ports monitoring module, data processing module, data transmission blocks; Said receiving subsystem comprises reception gateway and blue-teeth data receiver module; Said reception gateway comprises ZigBee packet intercepting and capturing module, data processing module, serial ports forwarding module, configuration control module, serial ports monitoring module, receiving processing module, bluetooth sending module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918302A (en) * | 2015-05-29 | 2015-09-16 | 广东欧珀移动通信有限公司 | Method for constructing mesh network and wireless sound box |
| CN113329359A (en) * | 2021-06-07 | 2021-08-31 | 杭州涂鸦信息技术有限公司 | Communication method, communication device, electronic equipment and readable storage medium |
-
2011
- 2011-07-26 CN CN201120265717U patent/CN202143065U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918302A (en) * | 2015-05-29 | 2015-09-16 | 广东欧珀移动通信有限公司 | Method for constructing mesh network and wireless sound box |
| CN104918302B (en) * | 2015-05-29 | 2018-05-29 | 广东欧珀移动通信有限公司 | A kind of method and wireless sound box for building wireless mesh network |
| CN113329359A (en) * | 2021-06-07 | 2021-08-31 | 杭州涂鸦信息技术有限公司 | Communication method, communication device, electronic equipment and readable storage medium |
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