An Optimal Control Information Generation Method for Delay Tolerant Network Routing
A delay-tolerant network, optimized control technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as optimal and sub-optimal global network performance
Active Publication Date: 2019-11-01
HARBIN ENG UNIV
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Problems solved by technology
However, the network characteristics of the DTN network, such as intermittent connections, intermittent links, and time-varying topology, have great limitations in the selection of relay nodes by routing strategies.
The routing strategy can only select relay nodes according to local network resources, and can only achieve local optimal relay node selection, but cannot make the global network performance optimal or suboptimal
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[0025] The invention proposes an optimized control information generation method (OCIGM) for DTN routing strategy.
[0026] The role of the OCIGM optimization control information generation method:
[0027] The main function of the OCIGM optimization control information generation method is to generate optimization control information for the DTN routing strategy of the mobile terminal (node) (to improve the message forwarding success rate, reduce network overhead, and reduce network packet loss rate). According to the optimization control information, the routing strategy in the mobile terminal adjusts the routing strategy by limiting the number of copies of the message. According to different types of optimized control information, the DTN routing strategy can be divided into the following three situations to limit the number of message copies:
[0028] Assume that the number of copies of the message before receiving the optimization control information is nrofCopies, and t...
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The invention provides an optimized control information generating method for delay-tolerant network routing. The method mainly comprises the following steps: generating optimized control information (to improve the success rate of message delivery, to reduce the network overhead, and to reduce the network packet drop rate) for a DTN routing policy of a mobile terminal (node); and according to the optimization control information, adjusting the routing policy in the mobile terminal by limiting the number of message copies. According to the DTN routing policy, the number of message copies under different conditions is limited according to different types of optimized control information. According to the invention, optimized control information for DTN routing is generated according to the evaluated global network state, and the routing policy in the mobile terminal is adjusted by limiting the number of message copies according to the optimized control information.
Description
technical field [0001] The invention relates to a routing optimization control information generation method, in particular to a delay tolerant network (DTN) routing-oriented optimization control information generation method. Background technique [0002] Due to the characteristics of intermittent connection and link instability of the DTN network, it is difficult to obtain deterministic network status feedback of the entire network. However, the global network state can make the DTN routing policy to be globally optimal or better when relaying or delivering messages. In a network environment with limited resources (insufficient resources, unbalanced resource distribution), how to use existing network resources to evaluate the global network status, so as to control DTN routing more effectively is an important issue that needs to be solved urgently to improve network performance. question. [0003] Optimal control technology is to achieve corresponding optimization throug...
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IPC IPC(8): H04L12/701
CPCH04L45/00
Inventor 吕宏武王贺哲吴芳王慧强朱金美
Owner HARBIN ENG UNIV