A method for joint opportunistic routing and channel assignment in wireless networks
A channel allocation and wireless network technology, applied in wireless communication, electrical components, etc., can solve problems affecting channel allocation schemes, radio frequency cannot work together, and affect routing candidate node selection, etc., to improve aggregation throughput and flow balance, Good network performance and reduced latency
Active Publication Date: 2016-05-18
HUNAN UNIV
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But in fact, routing selection and channel allocation affect each other. The channel allocation scheme will affect the selection of routing candidate nodes, and radio frequencies working on different channels cannot work together; at the same time, the selection of candidate nodes will also affect the interference relationship, thereby affecting the channel allocation scheme.
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[0035] Such as image 3 As shown, when the method of the present invention is initialized, the link capacity is evenly allocated, and the route is selected according to the routing index of capacity perception, and the expected load after the route is calculated and determined; the expected load is used as the target of channel allocation, so that the allocated channel can meet the expected load as much as possible , calculate the capacity generated by channel allocation; then use the capacity as the input of routing selection, and perform routing selection according to the allocated capacity, so iteratively adjust routing selection and channel allocation until the selection and allocation results meet the transmission bandwidth requirements of the service flow. Experimental results show that, compared with the way of public and traditional channel allocation after known routes, the method (JORCA) of the present invention can improve the network aggregation throughput, the aggr...
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The invention discloses a method for combining opportunistic routing selection and channel allocation in a wireless network. The method comprises the following steps of: equally distributing link capacity during initializing; carrying out routing selection according to a routing index sensed by the capacity, and calculating and determining predetermined load after routing; calculating capacity generated by channel allocation after the predetermined load is taken as a target of the channel allocation to ensure that the allocated channel can satisfy the predetermined load to the greatest extent; and with the capacity as input of routing selection, carrying out the routing selection according to the allocated capacity, and iterating in this way to adjust the routing selection and the channel allocation until the selection and allocation results satisfy sending bandwidth needs of service flow. An experimental result indicates that the method disclosed by the invention improves convergence throughput capacity of the wireless network by 44% and 15.5%, and lowers delay by 12.7% and 21.3% respectively in comparison with an existing way of carrying out public and conventional channel allocation after routing.
Description
technical field [0001] The present invention relates to routing selection and channel allocation technology in wireless network, especially a method for joint opportunity routing selection and channel allocation. Background technique [0002] Opportunistic routing is an emerging routing method in multi-hop wireless networks. It utilizes the nature of wireless media broadcasting and multi-user diversity, and does not determine the next hop of the route in advance, and directly broadcasts and sends data packets. There may be multiple neighboring nodes around them that can receive them correctly. data pack. Some kind of coordination is carried out between the nodes that receive the data packet, and one of the nodes that is "closest" to the destination node continues to forward it. Of course, not all nodes participate, and opportunistic routing selects some of them to participate according to certain rules. These selected neighbor nodes are called candidate nodes or candidate f...
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IPC IPC(8): H04W40/02H04W72/04
Inventor 张大方何施茗谢鲲张继乔宏
Owner HUNAN UNIV