CN102255713B - Data packets of underwater sound sensor network and transmission method - Google Patents
Data packets of underwater sound sensor network and transmission method Download PDFInfo
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- CN102255713B CN102255713B CN 201110207263 CN201110207263A CN102255713B CN 102255713 B CN102255713 B CN 102255713B CN 201110207263 CN201110207263 CN 201110207263 CN 201110207263 A CN201110207263 A CN 201110207263A CN 102255713 B CN102255713 B CN 102255713B
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Abstract
The invention provides data packets of an underwater sound sensor network and a transmission method. Each data packet consists of a packet header part, a packet header verification part and a data part, wherein the packet header part comprises address information; the packet header verification part only comprises verification information related to the packet header part; the data part consists of one or more data blocks of equal length; and each data block consists of a transmitted data part and verification information of the transmitted data part respectively. The basic thought of the invention is to partition the conventional large transmitted data block into certain data blocks of equal length for respective verification, so that the data volume of retransmission in an environment, such as an underwater acoustic network in which a transmission error occurs easily, can be reduced.
Description
Technical field
What the present invention relates to is a kind of data packet format that carries out the sensor network of wireless telecommunications under water by sound.The present invention also relates to a kind of data transmission method that carries out the sensor network of wireless telecommunications under water 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.The error rate height causes packet often to need to retransmit.
Summary of the invention
The object of the present invention is to provide a kind of packet of water sound sensor network of the data that can reduce re-transmission.The present invention also aims to provide a kind of transmission method of packet of water sound sensor network.
The object of the present invention is achieved like this:
The packet of water sound sensor network of the present invention is: each packet is comprised of header part, packet header check part and data division, wherein the header part comprises address information, the packet header check part only comprises the check information about the header part, data division is one or more data blocks of equal length, and each data block is comprised of the check information of the transmission of data part and this part respectively.
The transmission method of the packet of the water sound sensor network of invention is:
1. each packet is comprised of header part, packet header check part and data division, when sending node will send data, data division is divided into a plurality of identical data pieces; Each data block has independent check part, there is not the checking data about total data, be provided with independent check part for frame head, the rear portion of packet is data block, the sequence number that comprises the affiliated bag that represents self-position and the data block sequence number in affiliated bag that sent bag before belonging to of retransmitting;
2. when node is received a packet, at first check the packet header check part in the packet, if verification is incorrect, then beam back the ack bag, require retransmission data packet may, this process finishes; Otherwise, illustrate that header packet information is correct, continue to check data division; If it is correct that data all receive, then send ack bag notice sending node packet and correctly receive, and the report upper-layer protocol correctly receives a packet; If there have one or more data blocks to receive to be incorrect, then send the ack bag, which data block of notice sending node needs to retransmit;
3. when sending node is received the ack bag that destination node sends, judge whether to need to retransmit whole packet, or a few data blocks; If need to retransmit whole packet, then send again packet, if only need send the several data blocks in the packet, each data block that then will retransmit adds original bag sequence number and the data block sequence number in original bag of expression self-position, and sends with a packet of new data block composition that will send; If know that by the ack bag whole packet is correctly received, then notify upper-layer protocol, correctly sent packet;
4. after sending node retransmits data block in certain packet or certain packet and reaches default number of retransmissions, then abandon this packet, and report this data packet transmission failure to upper-layer protocol.
The basic thought of the packet of water sound sensor network of the present invention is the data block that the transmission of data of former bulk is divided into several equal lengths, carry out respectively verification, can in the environment of the so easy generation error of transmission of underwater acoustic network, reduce the data volume that retransmits like this.
Description of drawings
Accompanying drawing is the schematic diagram of the packet of water sound sensor network of the present invention.
Embodiment
The below does more detailed description to the present invention for example:
The packet of water sound sensor network of the present invention: the transmission of data of bulk is divided into the data block of several equal lengths, carries out respectively verification.That is: each packet is by the header part, and packet header check part and data division form.Wherein the header part is the same with other similar agreement, comprises address information, data packet length, bag sequence number etc.The packet header check part only comprises the check information about the header part.Data division is comprised of two parts.The front portion is to belong to one or more data blocks that this sends the equal length of bag, and each data block is comprised of the check information of the transmission of data part and this part respectively.Last data block of this part may be less.The rear portion of data division comprises 0 or a plurality of data block, it is the data block of the former bust this of re-transmission, the structure of these data blocks is substantially the same with the front portion data block structure, just many original bag sequence numbers that self are subordinate to and the data block sequence number in former bag etc.As shown in drawings.
The transmission method of the packet of the water sound sensor network of invention is:
1. when sending node will send data, by above-mentioned requirements organising data bag.Be data division is divided into a plurality of identical data pieces with the difference of other data formats, last data block can be unequal.Each data block has independent check part, not about the checking data of total data, has increased independent check part for frame head.The rear portion of bag is the data block that sent bag before belonging to of retransmitting, and has wherein increased sequence number and the data block sequence number in affiliated bag of the affiliated bag of expression self-position.
2. when node is received a packet, at first check the packet header check part in the bag, if verification is incorrect, then beam back the ack bag, require to retransmit this bag, this process finishes.Otherwise, illustrate that header packet information is correct.Continue to check data division.According to the check information of each data block, it is correct to know which data block receives, and which receives mistake.If it is correct that data all receive, then send correct reception of ack bag notice this bag of sending node, and the report upper-layer protocol correctly receives a packet.If there have one or more data blocks to receive to be incorrect, then send the ack bag, which data block of notice sending node needs to retransmit.
3. when sending node was received the ack bag that destination node sends, can know whether needed to retransmit whole bag, or a few data blocks.If need to retransmit whole bag, then send again this bag, if only need send the several data blocks in the bag, each data block that then will retransmit adds original bag sequence number and the data block sequence number in original bag of expression self-position, and sends with a packet of new data block composition that will send.If know that by the ack bag whole bag is correctly received, then notify upper-layer protocol, correctly sent this packet.
4. after sending node retransmits data block in certain packet or certain bag and reaches default number of retransmissions, then abandon this bag, and report this bag bust this to upper-layer protocol.
Claims (1)
1. the transmission method of the packet of a water sound sensor network, it is characterized in that: each packet is comprised of header part, packet header check part and data division, wherein the header part comprises address information, the packet header check part only comprises the check information about the header part, data division is one or more data blocks of equal length, each data block is comprised of the check information of the transmission of data part and this part respectively, and transmission method comprises:
(1). each packet is comprised of header part, packet header check part and data division, when sending node will send data, data division is divided into a plurality of identical data pieces; Each data block has independent check part, there is not the checking data about total data, be provided with independent check part for frame head, the rear portion of packet is data block, the sequence number that comprises the affiliated bag that represents self-position and the data block sequence number in affiliated bag that sent bag before belonging to of retransmitting;
(2). when node is received a packet, at first check the packet header check part in the packet, if verification is incorrect, then beam back the ack bag, require retransmission data packet may, this process finishes; Otherwise, illustrate that header packet information is correct, continue to check data division; If it is correct that data all receive, then send ack bag notice sending node packet and correctly receive, and the report upper-layer protocol correctly receives a packet; If there have one or more data blocks to receive to be incorrect, then send the ack bag, which data block of notice sending node needs to retransmit;
(3). when sending node is received the ack bag that destination node sends, judge whether to need to retransmit whole packet, or a few data blocks; If need to retransmit whole packet, then send again packet, if only need send the several data blocks in the packet, each data block that then will retransmit adds original bag sequence number and the data block sequence number in original bag of expression self-position, and sends with a packet of new data block composition that will send; If know that by the ack bag whole packet is correctly received, then notify upper-layer protocol, correctly sent packet;
(4). after sending node retransmits data block in certain packet or certain packet and reaches default number of retransmissions, then abandon this packet, and report this data packet transmission failure to upper-layer protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110207263 CN102255713B (en) | 2011-07-24 | 2011-07-24 | Data packets of underwater sound sensor network and transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110207263 CN102255713B (en) | 2011-07-24 | 2011-07-24 | Data packets of underwater sound sensor network and transmission method |
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| Publication Number | Publication Date |
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| CN102255713A CN102255713A (en) | 2011-11-23 |
| CN102255713B true CN102255713B (en) | 2013-10-30 |
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| CN 201110207263 Expired - Fee Related CN102255713B (en) | 2011-07-24 | 2011-07-24 | Data packets of underwater sound sensor network and transmission method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202124B (en) * | 2014-09-12 | 2017-10-10 | 成都博智维讯信息技术有限公司 | A kind of erp packet communications method |
| WO2017054182A1 (en) * | 2015-09-30 | 2017-04-06 | 华为技术有限公司 | Data check method and apparatus |
| CN106330395A (en) * | 2016-08-23 | 2017-01-11 | 上海斐讯数据通信技术有限公司 | Wireless communication system and method, management frame retransmission device and method and frame structure |
| CN106304186A (en) * | 2016-08-23 | 2017-01-04 | 上海斐讯数据通信技术有限公司 | Wireless communication system and method, data re-transmitting device and method, paradigmatic structure |
| CN110213020A (en) * | 2019-05-31 | 2019-09-06 | 杭州涂鸦信息技术有限公司 | Data transmission method, terminal, system and device based on bluetooth peripheral hardware |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS54128205A (en) * | 1978-03-29 | 1979-10-04 | Matsushita Electric Works Ltd | Block transmission system |
| US6424625B1 (en) * | 1998-10-28 | 2002-07-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for discarding packets in a data network having automatic repeat request |
| CN1290287C (en) * | 2000-04-17 | 2006-12-13 | 北方电讯网络有限公司 | Cooperation of ARQ protocols at physical and link layers for wireless communications |
| CN101136722B (en) * | 2007-10-15 | 2010-08-11 | 北京交通大学 | Data transmitting method and transmitting equipment suitable for high speed mobile terminal |
| JP4985565B2 (en) * | 2008-06-30 | 2012-07-25 | 富士通株式会社 | Transmission / reception circuit, reception circuit, and control method for transmission / reception circuit |
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Non-Patent Citations (2)
| Title |
|---|
| IEEE 802.11 MAC-Level FEC Scheme with Retransmission Combining;Sunghyun Choi 等;《IEEE Transactions on Wireless Communications》;20060131;第5卷(第1期);第204-205页 * |
| Sunghyun Choi 等.IEEE 802.11 MAC-Level FEC Scheme with Retransmission Combining.《IEEE Transactions on Wireless Communications》.2006,第5卷(第1期),第204-205页. |
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