A method for calculating link duration, MPR node selection method and routing protocol

Abstract

The invention discloses a link duration calculation method, an MPR node selection method and a routing protocol, wherein, the MPR node selection method comprises the following steps: S1, adding a member of N1 set whose forwarding intention is WILL_ALWAYS into the MPR set; S2, calculating the coverage rate of all nodes in N1; S3, calculating the link duration from the local node to the node in N1;4, if a node exists in N2 can only be reached through a unique node in N1, adding the node in N1 into the MPR set; 5, judging whether there is a node not covered by the MPR node in the N2, if not, thealgorithm ends, otherwise, calculating the coverage rate of the MPR node not selected in the N1; the nodes with the highest coverage and the longest link duration are selected to join the MPR set, and the nodes covered by the MPR set are removed. S6: Loop until N2 is empty. As a result of that invention, the LD-OLSR routing protocol has about 10% average end-to-end delay, normalized throughput, number of TC packets, and routing overhead. 15% performance improvement.

Description

technical field [0001] The invention relates to the field of communication, in particular to a method for calculating the link duration of a near-space dynamic network, an MPR node selection method and a routing protocol. Background technique [0002] The near-space network generally refers to an interconnected information acquisition and distribution network composed of near-space vehicles (such as airships, balloons, drones, etc.) figure 1 shown. Compared with satellite communications and terrestrial communications, near-space networks have the characteristics of flexible deployment, low cost, small delay, and large coverage. Poor network stability degrades network performance and increases overhead. Therefore, exploring link stability analysis methods, designing high-stability routing protocols, and ensuring the efficiency and reliability of data transmission are one of the important research contents of dynamic networking in adjacent space. [0003] Currently, commonl...

AI Technical Summary

Problems solved by technology

However, the William Su formula only gives the calculation method of the link duration of the two-dimensional plane scene when the absolute position and velocity information of the node is available, and its application range is limited, and it cannot meet the actual needs of the dynamic movement of the spatial node in the three-dimensional space within the adjacent space range.

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