CN102595549A - Routing method for wireless sensor networks (WSN) based on time division multiple access (TDMA) - Google Patents
Routing method for wireless sensor networks (WSN) based on time division multiple access (TDMA) Download PDFInfo
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- CN102595549A CN102595549A CN2012100961315A CN201210096131A CN102595549A CN 102595549 A CN102595549 A CN 102595549A CN 2012100961315 A CN2012100961315 A CN 2012100961315A CN 201210096131 A CN201210096131 A CN 201210096131A CN 102595549 A CN102595549 A CN 102595549A
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Abstract
The invention relates to a routing method for wireless sensor networks (WSN) based on time division multiple access (TDMA). The method comprises the following step that: in the WSN based on the TDMA, each terminal device communicates with the corresponding coordinator through a specific time slot, wherein each terminal device communicates with a far end entity only by a routing method. According to the routing method, the working mode of the TDMA is utilized to the maximum extent, so that the critical paths required by routing are simplified, and aims of simplifying the device design, reducing the total system power consumption and improving the total network efficiency are fulfilled. Moreover, the routing method has the characteristics that: same-frequency communication is adopted, and creation and selection of the critical paths are simplified, so the total network efficiency is improved; a frequency modulation or frequency spread technology is not required, so the device design is simplified; and through the mode of the TDMA, the work time of the whole system is shortened, and the system power consumption is reduced.
Description
Technical field
The present invention relates to wireless sensor network technology, be specifically related to a kind of network route method of wireless sensor network.
Background technology
Wireless sensor network (Wireless Sensor Networks; WSN) begun at present to be widely used in the social all trades and professions such as industry monitoring, intelligent grid, Smart Home, intelligent transportation, public safety, health care, environmental protection; Be particularly useful for the field that some is inconvenient to connect up, for example industrial circle such as power high voltage equipment on-line monitoring, slewing vibration online monitoring; Or some often needs the occasion of mobile test, for example commerical test data acquisition system etc.
With Zigbee is the wireless sensor network of representative, and the networking mode district through CDMA (Code-Division Multi-Access) or communication of straight sequence spread spectrum (Direct-Sequence Spread-Spectrum) and FDMA (Frequency-Division Multi-Access) realizes telegon (Coordinator) and the communication between the affiliated terminal equipment (Device) in the wireless sensor network.
With CDMA is in the wireless sensor network of networking mode; Adjacent telegon uses same frequency to carry out work; When one of them telegon and affiliated terminal equipment communicate; Need to distinguish different telegons, thereby avoid interference from other telegons and affiliated terminal equipment thereof through spread spectrum, therefore:
1) must use higher wireless bandwidth to realize spread spectrum communication;
2) when the telegon in the network is communicated by letter with affiliated terminal equipment, need control the same frequency that suppresses from other telegons and equipment through power and disturb;
3) transceiver architecture of spread spectrum communication is complicated more, implements very difficulty.
With FDMA is the wireless sensor network of networking mode, and adjacent telegon communicates through using different working frequency and the terminal equipment under it, thereby avoids with interference frequently, thereby makes:
1) must use more wireless bandwidths to distribute to different telegons uses;
2) when terminal equipment is being operated in telegon on the different frequency and switches, need the telegon on the frequency that extra monitoring institute might exist, thereby caused the physics realization of expense with the complicacy of unnecessary time;
3) break down can not work the time when certain telegon, terminal equipment must be adjusted operating frequency under it, be linked into the telegon on other frequencies, so the robustness of network is not strong, the self-healing ability.
Summary of the invention
In order to overcome the deficiency of prior art; The objective of the invention is to propose a kind of based on TDMA (Time Division Multiple Access, time division multiple access) wireless sensor network routing mode, its can simplified apparatus design; Reduce the entire system power consumption, improve the network whole efficiency.
In order to achieve the above object, the technical scheme that the present invention adopted is following:
A kind of wireless sensor network routing mode based on TDMA, it may further comprise the steps,
A) in same TDMA wireless sensor network, arrange a plurality of telegons; Each telegon be set to through time division multiple access way with its under several terminal equipments communicate, all telegons all are configured such that with same frequency and carry out work;
B) be set the data transmit-receive cycle, the data transmit-receive cycle is made up of a plurality of timeslices; Each telegon is arranged on and carries out work in the different time slices;
C) be set to mutual listening state between the adjacent telegon;
D) the information transmission between the terminal equipment is accomplished through telegon, and is undertaken by following regular a1 and regular b1:
A1) pass to adjacent telegon to information in the timeslice of the telegon of information sender under it, information is distributed by adjacent telegon, and wherein, the information that telegon sent of information sender is provided by first terminal equipment under it;
B1) receive information from the telegon that is adjacent in the timeslice of receiving party's telegon under it; And an information that receives sends to its second affiliated terminal equipment; Wherein, second terminal equipment is the target device of the information transmission of first terminal equipment.
As preferable methods, among the step C, the information between the telegon is propagated and is carried out as follows:
A2) outside transmission information in the timeslice of first telegon under it, second telegon is monitored the information in the TDMA wireless sensor network, first telegon and the adjacent each other telegon of second telegon;
B2) receive the information that first telegon is sent in the timeslice of second telegon under it, simultaneously, first telegon is monitored second telegon and whether is received information; If first telegon listens to second telegon and received information, then first telegon stops the information of outwards sending in next data transmit-receive cycle, and carries out step c2 in the timeslice of second coordination under it; If first telegon listens to second telegon and do not receive information, then first telegon continues step a2 in next data transmit-receive cycle;
C2) if second telegon is not the terminal point telegon, then second telegon continues to send information to other adjacent telegons; If second telegon is the terminal point telegon, then the rule according to step D responds.
The present invention has following beneficial effect:
In the TDMA wireless sensor network, all terminal equipments are communicated by letter with corresponding telegon through the special time sheet.When terminal equipment need be communicated by letter with the entity of far-end, must realize through the mode of route.The present invention is through using the working method of TDMA to greatest extent, thereby simplifies the needed critical path of route, reaches the simplified apparatus design, reduces the entire system power consumption, improves the purpose of network whole efficiency.And have following characteristics:
1) uses with communication frequently, simplify the establishment and the selection of critical path, improve the network whole efficiency;
2) need not use frequency modulation or spread spectrum, the simplified apparatus design;
3) through the mode of TDMA, the time of reducing total system work, reduce system power dissipation.
Description of drawings
Fig. 1 is the structural representation of the application example of the wireless sensor network routing mode based on TDMA of the present invention;
Fig. 2 is the flow chart of the application example of the wireless sensor network routing mode based on TDMA of the present invention.
Embodiment
Below, in conjunction with accompanying drawing and embodiment, the present invention done further describing, so that clearerly understand the present invention's technological thought required for protection.
The invention discloses a kind of wireless sensor network routing mode based on TDMA, it may further comprise the steps,
A) in same TDMA wireless sensor network, arrange a plurality of telegons; Each telegon be set to through time division multiple access way with its under several terminal equipments communicate, all telegons all are configured such that with same frequency and carry out work;
B) be set the data transmit-receive cycle, the data transmit-receive cycle is made up of a plurality of timeslices; Each telegon is arranged on and carries out work in the different time slices;
C) be set to mutual listening state between the adjacent telegon, and the information between the telegon is propagated as follows a2 and is carried out to step c2:
A2) outside transmission information in the timeslice of first telegon under it, second telegon is monitored the information in the TDMA wireless sensor network, first telegon and the adjacent each other telegon of second telegon;
B2) receive the information that first telegon is sent in the timeslice of second telegon under it, simultaneously, first telegon is monitored second telegon and whether is received information; If first telegon listens to second telegon and received information, then first telegon stops the information of outwards sending in next data transmit-receive cycle, and carries out step c2 in the timeslice of second coordination under it; If first telegon listens to second telegon and do not receive information, then first telegon continues step a2 in next data transmit-receive cycle;
C2) if second telegon is not the terminal point telegon, then second telegon continues to send information to other adjacent telegons; If second telegon is the terminal point telegon, then the rule according to step D responds.
D) the information transmission between the terminal equipment is accomplished through telegon, and is undertaken by following regular a1 and regular b1:
A1) pass to adjacent telegon to information in the timeslice of the telegon of information sender under it, information is distributed by adjacent telegon, and wherein, the information that telegon sent of information sender is provided by first terminal equipment under it;
B1) receive information from the telegon that is adjacent in the timeslice of receiving party's telegon under it; And an information that receives sends to its second affiliated terminal equipment; Wherein, second terminal equipment is the target device of the information transmission of first terminal equipment.
For the ease of understanding said method, describe with a concrete application example below.
As shown in Figure 1, in the TDMA wireless sensor network, be furnished with four telegons, be respectively telegon A 1, telegon B 2, telegon C 3 and telegon D 4.Each telegon all pass through time division multiple access way with its under several terminal equipments (among the figure shown in the two-way front) communicate, all telegons all use same frequency to carry out work.
As shown in Figure 2, the data transmit-receive cycle is set, the data transmit-receive cycle is made up of five timeslices, is respectively timeslice A, timeslice B, timeslice C, timeslice D and a free time sheet (i.e. unallocated timeslice among the figure).Timeslice A, timeslice B, timeslice C, free time, sheet, timeslice D were arranged in order with time sequencing, and the data transmit-receive cycle is passed continuous repetition in time.Each telegon is arranged on and carries out work in the different time slices; Be that telegon A 1 works when being arranged on timeslice A; Telegon B 2 is arranged on timeslice B work; Telegon C 3 is arranged on timeslice C work, and telegon D 4 is arranged on timeslice D work, and free time sheet can distribute to newly-increased telegon.
In conjunction with Fig. 1 and Fig. 2, suppose telegon A 1 and telegon B 2, telegon A 1 and telegon D 4; Telegon B 2 and telegon C 3; The telegon that telegon C 3 is adjacent each other respectively with telegon D 4, and telegon A 1 and telegon C 3, telegon B 2 and telegon D 4 no any contacts.Wherein, adjacent telegon is meant: can intercom mutually between two telegons.Be set to mutual listening state between the adjacent telegon, for example, in the time of telegon A 1 work, telegon B 2, telegon D 4 all can monitor the action of telegon A 1; In the time of telegon B 2 work, telegon A 1, telegon C 3 all can monitor the action of telegon B 2.
(in the accompanying drawing with unidirectional arrow designation data flow to) as shown in Figure 2, should use the routing procedure of wireless sensor network of instance following:
S1: terminal equipment X 5 need communicate with the terminal equipment Y 6 of far-end, and the terminal equipment X 5 under the telegon B 2 sends data to telegon B 2 in timeslice B.
S2: telegon B 2 is distributed to telegon A 1 and telegon C 3 to data in the timeslice B in next data transmit-receive cycle.
S3: telegon C 3 sends to telegon D 4 to data in the notebook data timeslice C in transmitting-receiving cycle; And; Telegon B 2 can listen to telegon C 3 and whether receive data (in the present embodiment; Suppose that telegon B 2 has confirmed that telegon C 3 receives data), certainly, telegon C 3 also can listen to telegon D 4 and whether receive data; Time sequencing from figure can know that in the cycle, timeslice B is after timeslice A at same data transmit-receive; And timeslice B is before timeslice C, when telegon B 2 work, pass by that (telegon A 1 is not activated the operating time of telegon A 1; Do not receive and send data), and the operating time of telegon C 3 also not to arrive, after telegon C 3 has accomplished the action that data send; As time goes on; Entry time sheet C, telegon C 3 work just can receive and sent data.
S4: telegon D 4 sends to terminal equipment Y 6 to data in the notebook data timeslice D in transmitting-receiving cycle, accomplish the data route that terminal equipment X 5 communicates by letter with terminal equipment Y 6.
S5: in the timeslice A in next data transmit-receive cycle, telegon A 1 sends data to telegon D 4, but because telegon D 4 had received this data from telegon C 3, therefore, the coordinated device D 4 of these data abandons.In timeslice B and the timeslice C, because telegon B 2, telegon C 3 listen to the action that data have been successfully received, therefore, and in the notebook data transmitting-receiving cycle, telegon B 2, telegon C 3 data of not redispatching.
In addition, the telegon quantity in the present embodiment, the arrangement mode of timeslice can be decided according to actual conditions, and present embodiment is not done any qualification to telegon quantity, timeslice quantity and arrangement mode.
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection range of claim of the present invention all according to the technical scheme and the design of above description.
Claims (2)
1. based on the wireless sensor network routing mode of TDMA, it is characterized in that, may further comprise the steps,
In same TDMA wireless sensor network, arrange a plurality of telegons; Each telegon be set to through time division multiple access way with its under several terminal equipments communicate, all telegons all are configured such that with same frequency and carry out work;
The data transmit-receive cycle is set, and the data transmit-receive cycle is made up of a plurality of timeslices; Each telegon is arranged on and carries out work in the different time slices;
Be set to mutual listening state between the adjacent telegon;
Information transmission between the terminal equipment is accomplished through telegon, and is undertaken by following regular a1 and regular b1:
A1) pass to adjacent telegon to information in the timeslice of the telegon of information sender under it, information is distributed by adjacent telegon, and wherein, the information that telegon sent of information sender is provided by first terminal equipment under it;
B1) receive information from the telegon that is adjacent in the timeslice of receiving party's telegon under it; And an information that receives sends to its second affiliated terminal equipment; Wherein, second terminal equipment is the target device of the information transmission of first terminal equipment.
2. the wireless sensor network routing mode based on TDMA as claimed in claim 1 is characterized in that, among the step C, the information between the telegon is propagated and carried out as follows:
A2) outside transmission information in the timeslice of first telegon under it, second telegon is monitored the information in the TDMA wireless sensor network, first telegon and the adjacent each other telegon of second telegon;
B2) receive the information that first telegon is sent in the timeslice of second telegon under it, simultaneously, first telegon is monitored second telegon and whether is received information; If first telegon listens to second telegon and received information, then first telegon stops the information of outwards sending in next data transmit-receive cycle, and carries out step c2 in the timeslice of second coordination under it; If first telegon listens to second telegon and do not receive information, then first telegon continues step a2 in next data transmit-receive cycle;
C2) if second telegon is not the terminal point telegon, then second telegon continues to send information to other adjacent telegons; If second telegon is the terminal point telegon, then the rule according to step D responds.
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Citations (4)
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|---|---|---|---|---|
| KR20060124498A (en) * | 2005-05-31 | 2006-12-05 | 삼성전자주식회사 | Method for controlling media access in wireless sensor network |
| CN101400159A (en) * | 2008-11-11 | 2009-04-01 | 江苏技术师范学院 | ZigBee cellular network |
| CN102264146A (en) * | 2011-06-24 | 2011-11-30 | 浙江大学 | Time division multiple access/frequency division multiple access (TDMA/FDMA)-based wireless sensor network (WSN) medium access control (mac) layer scheduling method |
| CN102340819A (en) * | 2011-09-19 | 2012-02-01 | 中国科学院深圳先进技术研究院 | Conflict-free transmission method and system of sensor network |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20060124498A (en) * | 2005-05-31 | 2006-12-05 | 삼성전자주식회사 | Method for controlling media access in wireless sensor network |
| CN101400159A (en) * | 2008-11-11 | 2009-04-01 | 江苏技术师范学院 | ZigBee cellular network |
| CN102264146A (en) * | 2011-06-24 | 2011-11-30 | 浙江大学 | Time division multiple access/frequency division multiple access (TDMA/FDMA)-based wireless sensor network (WSN) medium access control (mac) layer scheduling method |
| CN102340819A (en) * | 2011-09-19 | 2012-02-01 | 中国科学院深圳先进技术研究院 | Conflict-free transmission method and system of sensor network |
Non-Patent Citations (1)
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Application publication date: 20120718 |