CN102263597B - Method for sending information between underwater acoustic sensor network nodes - Google Patents
Method for sending information between underwater acoustic sensor network nodes Download PDFInfo
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- CN102263597B CN102263597B CN 201110207229 CN201110207229A CN102263597B CN 102263597 B CN102263597 B CN 102263597B CN 201110207229 CN201110207229 CN 201110207229 CN 201110207229 A CN201110207229 A CN 201110207229A CN 102263597 B CN102263597 B CN 102263597B
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Abstract
The invention provides a method for sending information between underwater acoustic sensor network nodes. The method is characterized in that: before sending a data packet, every node waits a random time; (0, MAX_CW) is divided into n parts, which are (0, MAX_CW/n), (0, 2*MAX_ CW/n), (0, 3* MAX_CW/n)..., (0, (n-1)* MAX_ CW/n), (0, MAX_CW), wherein n is a preset parameter; before sending the data packet, the each node successively selects one of the n intervals and then randomly selects one CW from the interval as the random waiting time; when the node selects the (0, MAX_CW), the next selected interval is (0, MAX_CW/n) and so on. By using the method, differences of CW selections can be increased and conflicts can be avoided. When the selected MAX_CW is large, a mean value of the CW values selected by each node can be maintained lower than an original scheme and a system throughput rate can be maintained higher. If a packet loss ratio of the every node is high because of the conflicts, a selected ranged should be raised, conflicts should be reduced and the throughput rate should be raised.
Description
Technical field
What the present invention relates to is a kind of subsurface communication method.Specifically a kind of underwater sensor network carries out the method for wireless telecommunications by sound.
Background technology
Underwater acoustic communication is large owing to postponing, narrow bandwidth, and error rate is high, and common terrestrial radio communications protocol can't directly apply to this field.Postpone to cause greatly packet easily to conflict.The method of avoiding at present is each node time of random wait before sending packet, is called CW.If MAX_CW is the maximum duration of random wait, (0, MAX_CW) in the random CW that selects.
Current research shows, the MAX_CW in underwater sensor network has an optimal value, lower than or be greater than this optimal value, systematic function all can descend.Lower than this optimal value, each node stand-by period is too short, and conflict increases, and is greater than this optimal value, and each node waits for too long before giving out a contract for a project, wasted bandwidth.But this optimal value only could be determined after particular system is carried out to all round properties measurement.This is impossible in actual applications.
Summary of the invention
The object of the present invention is to provide a kind of internodal method for sending information of water sound sensor network that can significantly improve the communications throughput rate of system.
The object of the present invention is achieved like this:
Each node, before sending packet, is waited for a random time; Will (0, MAX_CW) be divided into n part, (0, MAX_CW/n), (0,2*MAX_CW/n), (0,3*MAX_CW/n) ..., (0, (n-1) * MAX_CW/n), (0, MAX_CW), wherein n is default parameter, and each node is before sending packet, choose successively in a said n interval, then from this interval, choose at random the time of a numerical value CW as random wait; When choosing (0, in the time of MAX_CW), next choose interval be (0, MAX_CW/n), so circulation.
The present invention can also comprise:
1, parameter preset n is 10.
2, each node determine CW choose interval the time, be one of random selection in n interval.
3, each node determine CW choose interval the time, if when the current local packet loss caused due to conflict is excessive, the direct maximum interval of selection, (0, MAX_CW).
4, the local packet loss caused due to conflict before described is excessive is to be greater than 70%.
The present invention can significantly improve the communications throughput rate of system.The present invention can increase the otherness that CW chooses, and avoids conflict, and chooses when excessive at MAX_CW, and the relatively former scheme of the mean value of the CW value that each node is selected keeps lower, so still can keep higher system throughput in this case.Simultaneously, if each node discovery, because conflict causes packet loss too high, improves the scope of choosing as far as possible, can reduce conflict, improve throughput.
The accompanying drawing explanation
Accompanying drawing is schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
The present invention proposes the internodal information transmit mechanism of a kind of water sound sensor network.Its implementation method is: each node, before sending packet, is waited for a random time.Existing scheme is (0, MAX_CW) time is chosen in interval at random, is called CW, and wherein MAX_CW is the maximum duration that can wait for.Design of the present invention is: will (0, MAX_CW) be divided into n part, (0, MAX_CW/n), (0,2*MAX_CW/n), (0,3*MAX_CW/n) ..., (0, (n-1) * MAX_CW/n), (0, MAX_CW), wherein n is default parameter, is generally 10.Each node, before sending packet, is chosen in a said n interval successively, then from this interval, chooses at random the time of a numerical value CW as random wait.When choosing (0, in the time of MAX_CW), next choose interval be (0, MAX_CW/n), so circulation.As shown in drawings, current interval is chosen the interval on the disk of rotation successively, and disk is divided into each interval of n.The method can increase the difference of the CW of each node selection, increases the extensibility that MAX_CW selects, thereby effectively avoids some conflicts, reduces at MAX_CW and selects when excessive, the time that node is waited for, improves the throughput of entire system.
Claims (4)
1. the internodal method for sending information of water sound sensor network, each node, before sending packet, is waited for a random time; It is characterized in that: will (0, MAX_CW) be divided into n part, (0, MAX_CW/n), (0,2*MAX_CW/n), (0,3*MAX_CW/n) ..., (0, (n-1) * MAX_CW/n), (0, MAX_CW), wherein n is default parameter, and each node is before sending packet, choose successively in a said n interval, then from this interval, choose at random the time of a numerical value CW as random wait; When choosing (0, in the time of MAX_CW), next choose interval be (0, MAX_CW/n), so circulation, the maximum duration that the time that wherein CW is random wait, MAX_CW are random wait.
2. the internodal method for sending information of water sound sensor network according to claim 1, it is characterized in that: parameter preset n is 10.
3. the internodal method for sending information of water sound sensor network according to claim 1 and 2 is characterized in that: each node determine CW choose interval the time, be one of random selection in n interval.
4. the internodal method for sending information of water sound sensor network according to claim 1 and 2, it is characterized in that: each node determine CW choose interval the time, if when the current local packet loss caused due to conflict is greater than 70%, the direct maximum interval of selection, (0, MAX_CW).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110207229 CN102263597B (en) | 2011-07-24 | 2011-07-24 | Method for sending information between underwater acoustic sensor network nodes |
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| CN 201110207229 CN102263597B (en) | 2011-07-24 | 2011-07-24 | Method for sending information between underwater acoustic sensor network nodes |
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| CN102263597A CN102263597A (en) | 2011-11-30 |
| CN102263597B true CN102263597B (en) | 2013-12-18 |
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| CN110336620B (en) * | 2019-07-16 | 2021-05-07 | 沈阳理工大学 | QL-UACW backoff method based on MAC layer fair access |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287000A (en) * | 2008-06-04 | 2008-10-15 | 中国海洋大学 | Media access control protocol for underwater sensor network based on TDMA |
| KR20090010552A (en) * | 2007-07-23 | 2009-01-30 | 강릉대학교산학협력단 | Method for routing in underwater sensor network based on hierarchical group |
| KR20100077707A (en) * | 2008-12-29 | 2010-07-08 | 강릉원주대학교산학협력단 | Method for setting of adaptive communication environment in under acoustic sensor network and the apparatus thereof |
| CN101982944A (en) * | 2010-11-17 | 2011-03-02 | 东南大学 | Method for underwater acoustic sensor network Aloha protocol |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090010552A (en) * | 2007-07-23 | 2009-01-30 | 강릉대학교산학협력단 | Method for routing in underwater sensor network based on hierarchical group |
| CN101287000A (en) * | 2008-06-04 | 2008-10-15 | 中国海洋大学 | Media access control protocol for underwater sensor network based on TDMA |
| KR20100077707A (en) * | 2008-12-29 | 2010-07-08 | 강릉원주대학교산학협력단 | Method for setting of adaptive communication environment in under acoustic sensor network and the apparatus thereof |
| CN101982944A (en) * | 2010-11-17 | 2011-03-02 | 东南大学 | Method for underwater acoustic sensor network Aloha protocol |
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Inventor after: Zhao Jing Inventor after: Yao Nianmin Inventor after: Ma Haifeng Inventor before: Yao Nianmin Inventor before: Ma Haifeng |
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Free format text: CORRECT: INVENTOR; FROM: YAO NIANMIN MA HAIFENG TO: ZHAO JING YAO NIANMIN MA HAIFENG |
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Granted publication date: 20131218 Termination date: 20190724 |