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A Distributed Time Slot Allocation Method for Enhancing Network Data Delivery Reliability

A time slot allocation and network enhancement technology, applied in wireless communication, electrical components, etc., can solve problems such as loss of control packets, high probability of node transmission conflicts, inconsistent node scheduling information, etc., to achieve high data delivery rate and ensure reliability Effect

Active Publication Date: 2019-05-10
HENAN UNIV OF SCI & TECH
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Problems solved by technology

However, since the distributed algorithm requires nodes to compete for wireless channel access and time slot allocation, the probability of transmission conflicts between nodes is high, and it is easy to lose control packets when exchanging time slot allocation information between nodes and cause inconsistent node scheduling information.

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  • A Distributed Time Slot Allocation Method for Enhancing Network Data Delivery Reliability
  • A Distributed Time Slot Allocation Method for Enhancing Network Data Delivery Reliability
  • A Distributed Time Slot Allocation Method for Enhancing Network Data Delivery Reliability

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Embodiment Construction

[0034] A distributed time slot allocation method for enhancing the reliability of network data delivery. First, nodes randomly access wireless channels and use a distributed method to establish their own time slot allocation schemes, and then nodes access wireless channels for data transmission according to their time slot allocation schemes In order to complete data aggregation, the steps of establishing respective time slot allocation schemes are as follows:

[0035] Step 1: Diffusion signal package

[0036] Setting: N 1 (v) represents the set of one-hop neighbor nodes of node v, N 2 (v) represents the set of two-hop neighbor nodes of node v, SC represents a set of continuous time slots, Indicates the set of consecutive time slots that node v uses to send data, Represents the set of continuous time slots used by node v to receive data, S(v) represents the time slot allocation scheme of node v, given by and joint composition;

[0037] Node v sets the backoff timer f...

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Abstract

A distributed time slot distribution method used for enhancing network data delivery reliability adopts a time round mode to organize a node competition time slot distribution process, is used to avoid the problem that a burst control packet relevant with the time slot distribution is lost due to the wireless transmission conflict between the nodes during a competition process, solves the problem that the time slot distribution information between the nodes is inconsistent, and guarantees the time slot distribution reliability; secondly, the method adopts a concurrent-replay strategy to solve the problem that the continuous time of each round is uncertain during a node time slot distribution process; finally, the method adopts a signal package diffusion mechanism to solve the problems that due to the excessive nodes participating in the time slot distribution at each round, the wireless transmission conflict is severe, and the performance of a time slot distribution algorithm declines, thereby realizing the advantages of being able to realize the correct and reliable time slot distribution on the conditions of not increasing the transmission delay and the network total activity time obviously, and guaranteeing a higher data delivery rate.

Description

technical field [0001] The invention relates to the field of wireless sensor network communication, in particular to a distributed time slot allocation method for enhancing the reliability of network data delivery. Background technique [0002] At present, the time slot allocation algorithms of wireless sensor network nodes are mainly divided into centralized and distributed scheduling methods. The centralized scheduling method was first based on graph theory-related algorithms. First, the sensor network was formally expressed as a graph G, and the coloring of the graph G was completed according to theoretical methods such as graph coloring. slots to implement scheduling of data transmission activities related to nodes or links and avoid conflicts. However, since most typical wireless sensor networks are organized in a tree topology, data transmission often has the characteristics of layer-by-layer aggregation, resulting in some sensor nodes needing to switch states frequen...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/02H04W74/08
CPCH04W74/02H04W74/085
Inventor 曾波王辉孙士保张各各李哲青张治学李沛谕李姗姗王利巧
Owner HENAN UNIV OF SCI & TECH
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