CN101925162A - WSN node dedicated processor having functions of security and location - Google Patents
WSN node dedicated processor having functions of security and location Download PDFInfo
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- CN101925162A CN101925162A CN2010101731152A CN201010173115A CN101925162A CN 101925162 A CN101925162 A CN 101925162A CN 2010101731152 A CN2010101731152 A CN 2010101731152A CN 201010173115 A CN201010173115 A CN 201010173115A CN 101925162 A CN101925162 A CN 101925162A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a dedicated processor for WSN (wireless sensor network) nodes, which comprises a general instruction module (1), an MAC (media access control) protocol and RFI (radio frequency interface) module (2), a wireless location instruction module (3) and an encryption and decryption instruction module (4) which are connected via dedicated buses, wherein the source address and destination address of data transmission are assigned in each instruction, so that the data can be transmitted among different modules and operated in the transmission among the modules according to the specific instruction. Compared with the processor for common use, the invention optimizes the requirements on location, encryption, decryption and transmission and the like as required in the WSN in a manner of integrated dedicated instructions; and compared with the existing processor, the processor of the invention has the advantages of low power consumption, high operation rate, simple structure, high communication security and location and the like.
Description
[technical field]: the present invention relates to field of wireless transmission, particularly a kind ofly be used for application specific processor on the wireless sensor network node.
[background technology]: (Wireless SensorNetwork WSN) is the network that is made of by the wireless communication technology self-organizing a large amount of sensor nodes to wireless sensor network.It can realize that the collection of data quantizes, handles and merge and the transmission application.It is formed by being deployed in sensor nodes a large amount of in the monitored area, by the ad hoc network system of communication formation multi-hop, thus the monitoring information of perception, collection and the processing network's coverage area of cooperation, and send to the observer.Wireless sense network is concentrated-distributed information gathering, message transmission and the information processing technology network information system in one, has characteristics such as low cost, microminiaturization, low-power consumption.
At present, wireless sensor network node generally adopts general processor, mainly realize procotol and algorithm by software, because general processor is not optimized at the tailor-made algorithm of wireless sensor network, cause node on communication is calculated, to consume big energy and time, be difficult to satisfy the needs of wireless sensor network at aspects such as power consumption and volumes.
In wireless sensor network, the processing of MAC agreement needs processor frequently to wake up from resting state, and MAC algorithm computation amount is little, control comparatively simple, can handle by the application specific hardware modules of low-power consumption fully,, reduce power consumption to increase the dormancy time of processor, otherwise, enciphering and deciphering algorithm and location algorithm amount of calculation are big, and processor performance and running frequency are had higher requirements, and pass through application specific hardware modules, the burden of processor be can alleviate, operation time and power consumption reduced.
Therefore, design has the wireless sensor network application specific processor of application specific hardware modules, can reduce node power consumption to a great extent, and reduction node cost for the large-scale application of wireless sensor network lays the foundation, has important practical significance and practical value.
[summary of the invention]:
The objective of the invention is to improve low, the problems of in wireless sensor network, using at present such as power consumption is big, arithmetic speed is slow, software programming complexity of general processor efficient, proposed a kind of application specific processor that is used for wireless biography device network.
To achieve these goals, the invention provides a kind of application specific processor that is used for high communication security of having of wireless sensor network and location, (1) universal command module, (2) MAC agreement and radio frequency interface module (3) wireless location instruction module (4) encryption and decryption instruction module.
Wherein, all modules all connect by bus, when processor is worked, according to the instruction of from program storage, obtaining, determine source address and destination address, bus is provided with above-mentioned signal according to instruction, finish the transmission of data, and calculating process occurs in the data transmission procedure.
In the technique scheme, described (1) universal command module has constituted the basic functions of processor, finishes and the similar calculation function of general processor.
In the technique scheme, described (2) MAC agreement and radio frequency interface module are divided into the system of setting the tone demodulation modes, transmitting power and tranmitting frequency etc. in commands for controlling, and packet encapsulated and resolves, realizes when launching collision detection---avoidance mechanism, when the MAC module was worked, other modules can dormancy.
In the technique scheme, the received signal intensity estimated distance that described (3) wireless location instruction module records according to reference node, and according to maximum likelihood method the result is carried out matrix operation, by removing of special use---the inner product instruction, to matrix decomposition, invert, the transposition scheduling algorithm quickens.
In the technique scheme, described (4) encryption and decryption instruction module is according to setting key, use the Rijndael algorithm that data are carried out encryption and decryption, and transmit to the MAC module data passes after the encryption and decryption, when the MAC module receives data, if judge data encrypting and deciphering, then data are given the encryption and decryption instruction module and be decrypted.
Advantage of the present invention and good effect:
1, of the present inventionly is used for process chip on the wireless sensor network node procotol that the wireless sensor network frequency of utilization is very high and the algorithm of signal processing is realized with hardware, the high efficiency of performance hardware logic, the power consumption of saving wireless sensor network node.
2, the processor that is used for the process chip on the wireless sensor network node of the present invention is dispatched each module according to software, by writing different software, can dispatch hardware module with diverse ways, thereby realize function, brought into play the flexibility of software the location in the wireless sensor network, encryption and decryption, transmission.
[description of drawings]: Fig. 1 is a kind of wireless sensor network node special processor structure chart that has high communication security and location based on transmission triggering architecture of the present invention.
The drawing explanation
(1) universal command module, (2) MAC agreement and radio frequency interface module, (3) wireless location instruction module, (4) encryption and decryption instruction module.
[embodiment]:
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the present invention is a kind of to have the wireless sensor network node special processor of high communication security and location based on transmission triggering architecture, comprises (1) universal command module, (2) MAC agreement and radio frequency interface module, (3) wireless location instruction module, (4) encryption and decryption instruction module.
Wherein, all modules all connect by bus, bus comprises source_sel, dest_sel, source_addr, dest_addr, data_in, data_out, signals such as interrupt, expression source selection respectively, target selection, source address, destination address, source data input, target data output and interrupt requests etc.
(1) the universal command module provide addition, full add method, subtraction, band borrow subtraction, position or, instructions such as, the arithmetic shift left non-of position XOR, position, logical shift left, arithmetic shift right, logic shift right, an exchange, byte exchange with, position, comprise 16 16 bit registers simultaneously, instruction pointer, data pointer, accumulator pointer register, interrupt request register, clock select register, flag bit register etc., they have realized a complete functional processor collection, can be used for carrying out the code that the user writes voluntarily, and other module is controlled.
(2) MAC agreement and radio frequency interface module are set operating frequency, transmitted power and modulation pattern etc. under the control of program.When not having data to send, MAC agreement and radio frequency interface module are according to agreement, by the switching of radio frequency interface module control radio-frequency module between reception and two kinds of patterns of dormancy.When receiving mode, MAC agreement and the radio frequency interface module signal content after according to signal strength signal intensity and demodulation comes the validity of judgment data, and obtains data load.When being in emission mode, it at first will intercept channel, when judging that present channel be empty, just launch data, otherwise the wait random time monitors once more, till channel idle.In the network of supporting Beacon, can also in the gateway distributed time slot, carry out transmit operation.
(3) the wireless location instruction module comprises two parts, at first, the received signal intensity estimated distance that need record according to reference node, this process is used the realization of tabling look-up, median is carried out the parabola interpolation computing, then and according to maximum likelihood method the result is carried out matrix operation, in matrix operation, being matrix decomposition and inverting of amount of calculation maximum, by extracting their co-operate, designed special-purpose removing---the inner product instruction, form by a divider and several inner product devices, wherein comprise a multiplier and a subtracter in the inner product device, by removing---the inner product instruction can be with n*n matrix inversion computation complexity from O (n
2) be reduced to O (n), greatly reduce operand, and then saved the required energy of location computing.
(4) the encryption and decryption instruction module uses the Rijndael algorithm, each round transformation of Rijndael algorithm is formed by 4 different conversion, comprise the conversion of S box, line translation, rank transformation and key wheel add etc., according to the wireless senser application characteristic, use 128 keys to carry out encryption and decryption, whole computational process needs 11 cycles, is all realized by hardware, does not need software processes.Carry out data encrypted and directly pass to the MAC module and send, both increased fail safe, reduced power consumption again.
Above-mentioned (2) MAC agreement and radio frequency interface module and (4) encryption and decryption instruction module have been finished the work of wireless sensor network from physical layer and MAC layer.In wireless sensor network, the frequency of utilization of these operations is very high, with these procotol hardwareization, improved Energy Efficiency Ratio on the one hand, saved power consumption, what processor can parallel processing bottom task on the other hand speeds up, and has improved the ability of processor, has really realized characteristics such as the low-power consumption, low cost of wireless sensor network processor, high integrated, high-performance and intellectuality.
Claims (3)
1. one kind has the wireless sensor network node special processor of high communication security and location based on transmission triggering architecture, comprising:
(1) universal command module, (2) MAC agreement and radio frequency interface module, (3) wireless location instruction module, (4) encryption and decryption instruction module.Wherein, connect by bus between all modules, the source address and the destination address of every instruction specify data transfer according to specific instruction, transmit data between disparate modules, carry out computing in the transmission course of intermodule.
2. wireless sensor network application specific processor according to claim 1, it is characterized in that, use special-purpose MAC agreement and radio frequency interface module (2) that the MAC agreement is handled, reduced power consumption, use wireless location instruction module (3) that the maximum likelihood location algorithm based on RSSI is calculated, reduce computation complexity and operation time, used encryption and decryption instruction module (4) that packet is carried out encryption and decryption, improved communications security.
3. wireless sensor network application specific processor according to claim 1, it is characterized in that, processor is handled the MAC layer data by MAC agreement and radio frequency interface module (2), obtain the present node position by wireless location instruction module (3), carry out routing operations by wireless sensor network routing algorithm based on the geographical position, by encryption and decryption instruction module (4) data are carried out the encryption and decryption transmission at last, and then realize network communication of wireless sensor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995727A (en) * | 2014-05-09 | 2014-08-20 | 南开大学 | Transmission trigger framework ASIP assembly tool chain applied to WSN |
| CN105210432A (en) * | 2013-04-15 | 2015-12-30 | 高通股份有限公司 | Control of the transmission characteristics for position determination |
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| CN101207602A (en) * | 2006-12-22 | 2008-06-25 | 中国科学院计算技术研究所 | Processing chip for wireless sensor network node |
| CN201126632Y (en) * | 2007-11-07 | 2008-10-01 | 孙军平 | WSN electric energy data acquisition and communication apparatus |
| US20090161915A1 (en) * | 2007-12-24 | 2009-06-25 | National Chiao Tung University Of Taiwan | Multi-person pose recognition system using a zigbee wireless sensor network |
| CN101707699A (en) * | 2009-11-09 | 2010-05-12 | 东南大学 | WSN and GPRS network convergence based remote monitoring terminal unit |
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- 2010-05-17 CN CN2010101731152A patent/CN101925162A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101207602A (en) * | 2006-12-22 | 2008-06-25 | 中国科学院计算技术研究所 | Processing chip for wireless sensor network node |
| CN201126632Y (en) * | 2007-11-07 | 2008-10-01 | 孙军平 | WSN electric energy data acquisition and communication apparatus |
| US20090161915A1 (en) * | 2007-12-24 | 2009-06-25 | National Chiao Tung University Of Taiwan | Multi-person pose recognition system using a zigbee wireless sensor network |
| CN101707699A (en) * | 2009-11-09 | 2010-05-12 | 东南大学 | WSN and GPRS network convergence based remote monitoring terminal unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105210432A (en) * | 2013-04-15 | 2015-12-30 | 高通股份有限公司 | Control of the transmission characteristics for position determination |
| CN103995727A (en) * | 2014-05-09 | 2014-08-20 | 南开大学 | Transmission trigger framework ASIP assembly tool chain applied to WSN |
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Application publication date: 20101222 |