CN101364857B - Wireless sensor network node collaboration method based on feedback channel - Google Patents

Wireless sensor network node collaboration method based on feedback channel Download PDF

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CN101364857B
CN101364857B CN2008101070608A CN200810107060A CN101364857B CN 101364857 B CN101364857 B CN 101364857B CN 2008101070608 A CN2008101070608 A CN 2008101070608A CN 200810107060 A CN200810107060 A CN 200810107060A CN 101364857 B CN101364857 B CN 101364857B
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node
sensor network
bunch
wireless sensor
channel
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CN101364857A (en
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龙承志
向满天
李立宏
陈卉
邹文生
张坚林
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Nanchang University
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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

Abstract

A wireless sensor network node cooperation method based on a feedback channel is characterized in that the method comprises the following steps: (1) transmitting a training sequence to a receiving cluster by a sensor network transmitting cluster; (2) transmitting a channel fading coefficient to a relay node after the receiving cluster receives an information; (3) determining transmission nodes that should participate in the cooperation by the relay node according to the channel fading coefficient; (4) selecting a transmission node to transmit a data information, and setting other nodes in the sleep state; and (5) re-transmitting a training sequence by the transmitting cluster to form a new work period after the coherence time comes. The wireless sensor network node cooperation method has the advantages that the nodes with better channel state can participate in cooperation to transmit information by using the feedback channel to feedback the state information of the channels, thereby finally reducing the transmission power and saving transmission energy.

Description

A kind of wireless sensor network node collaboration method based on feedback channel
Technical field
The present invention relates to a kind of network node collaboration method, relate in particular to a kind of wireless sensor network node collaboration method based on feedback channel.
Background technology
In wireless sensor network (WSN), each node power cannot be changed usually, so node energy consumption is a key issue.In the practical application of some WSN, such as the monitoring of battlefield site environment, the loss of WSN communication energy receives the actual physics environmental impact very big.Cause a multipath that principal element is exactly a channel of emitted energy consumption, signal receives the influence of multipath to cause decline.Guarantee the service quality (QoS) of whole network, must strengthen transmitting power for overcoming multi-path influence at transmitting terminal, thereby cause bigger energy loss.
MIMO is the diversity technique that overcomes multipath of development in recent years research, becomes the research focus of the domestic and international communications field, and it can effectively utilize decline and multipath, improves communication link quality, power system capacity and the availability of frequency spectrum.
Research to the sub-clustering cooperation before this mainly concentrates on encoding scheme or some energy consumption model; Do not consider specifically in an emission bunch or when receiving bunch; Let which node participate in collaboration communication; For these cooperative nodes, take which kind of selection strategy again, therefore also have certain distance from the practicality aspect.
Summary of the invention
The object of the present invention is to provide a kind of wireless sensor network node collaboration method based on feedback channel, the method that the present invention utilizes feedback channel to come feeding back channel state information lets the better node of information state participate in cooperation transmission information,
The present invention realizes like this, it is characterized in that method step is:
1, after wireless sensor network node is arranged cluster, the sensor network emission bunch is sent a training sequence and is received bunch;
2, receive and bunch to receive after the information, pass to via node to the channel fading coefficient;
3, via node is judged the sending node that participate in cooperating in view of the above, utilizes feedback channel feedback sending node sequence number to emission bunch then;
4, after emission bunch is received serial number information, select transmitting node to send data message, other does not choose node, gets into sleep state;
5, arrive coherence time after, emission bunch resends training sequence, forms the work period of a new round.
Advantage of the present invention is: the present invention utilizes feedback channel to come the method for feeding back channel state information; Let the better node of information state participate in cooperation transmission information; Can reach final reduction transmitted power, save the purpose of sending energy, prolong the purpose of network life.
Description of drawings
Fig. 1 is the present invention and current main-stream method performance comparison diagram.
In the drawings, transverse axis be bunch between transmission range, the longitudinal axis is wireless senser unit's bit total energy consumption.
Embodiment
As shown in Figure 1, can find out, bunch between distance when be 100m, this method, bunch between when being 100m, our method performance number is than chernoff performance bound about 50%, simultaneously than the mode of selecting cooperative node at random 17%.
Method step of the present invention is:
1) after wireless sensor network node is arranged cluster; In emission bunch Tx, each node
Figure G2008101070608D00021
sends training sequence to receiving bunch according to prearranged time slot
Figure G2008101070608D00022
broadcast mode;
2) in receiving bunch, each node j, 1#j N rAfter receiving the training sequence of Tx, estimate the channel fading coefficient H j = [ h j 1 · · · h Ji · · · h j N t ] , 1#i N r
3) receive bunch each node According to prearranged time slot
Figure G2008101070608D00025
Channel fading coefficient H jBe sent to via node (if target bunch then is a destination node, down with);
4) via node in receiving bunch is collected all channel fading coefficients After, compute matrix H = [ H 1 , H 2 , · · · H j , · · · H N r ] T In all | h Ij| 2, to distinct transmit node i=1 ..., N t, can obtain different
Figure G2008101070608D00031
Make B iBe sorted A i, promptly have B 1 ≥ B 2 ≥ · · · ≥ B M i ≥ · · · B N i , B 1 = Max ( A 1 · · · A N i ) . Then
Figure G2008101070608D00034
Pairing transmitting node sequence number is the node ID that we will select to participate in collaboration communication;
5) via node is through feedback channel sending node sequence number subclass C ( ∀ i ∈ C , A i ∈ ( B 1 , · · · , B M i ) ) To the emission bunch.Owing to be the feedback node sequence information here, only need tens bit, amount of information is very little, and than the forward data transmission of the kbits order of magnitude, the consumption of energy can be ignored;
6) after emission cluster knot point is received feedback node sequence number subset information, if node ID in the sequence number subclass then participate in collaboration diversity communication, otherwise gets into sleep.
If arrive coherence time, all sleep transmitting nodes are revived, and method jumps to the first step and restarts.

Claims (1)

1. wireless sensor network node collaboration method based on feedback channel is characterized in that method step is:
(1) after wireless sensor network node is arranged cluster, the sensor network emission bunch is sent a training sequence to receiving bunch;
(2) receive and bunch to receive after the training sequence, pass to via node to the channel fading coefficient;
(3) via node is judged the sending node participate in cooperating according to the channel fading coefficient, utilizes feedback channel feedback sending node sequence number to emission bunch then;
(4) after emission bunch is received node ID, select sending node to send data message, other does not choose node, gets into sleep state;
(5) arrive coherence time after, emission bunch resends training sequence, forms the work period of a new round.
CN2008101070608A 2008-09-04 2008-09-04 Wireless sensor network node collaboration method based on feedback channel Expired - Fee Related CN101364857B (en)

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CN101841495B (en) * 2009-03-16 2013-06-05 上海贝尔股份有限公司 Method and device for transmitting user data at multiple points with uplink cooperation
CN102036312B (en) * 2009-09-30 2013-08-07 华为技术有限公司 Pilot sequence transmission method, network node and system
CN102170699A (en) * 2011-04-15 2011-08-31 北京邮电大学 Single user MIMO scheme and device combined with space division multiplexing under double-layer cooperative cluster structure, and base station
CN102547597B (en) * 2012-03-09 2015-04-29 西安交通大学 Relay-based cooperative multicast method
CN103442390A (en) * 2013-09-09 2013-12-11 清华大学 Method and system for selecting coordinated sending set in coordinated multi-point system
WO2016173667A1 (en) * 2015-04-30 2016-11-03 Huawei Technologies Co., Ltd. Method for determining an optimal precoding parameter and precoding device of adjustable complexity
CN105827296B (en) * 2016-05-23 2018-12-18 电子科技大学 One kind feeding back cooperative beam manufacturing process based on 2bit
CN106100795B (en) * 2016-06-17 2020-04-21 哈尔滨工业大学深圳研究生院 Polar code coding cooperation method based on Plotkin construction and information bit re-dormancy

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