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Energy optimization multicast routing method based on cognitive self-organizing network

A self-organizing network and energy technology, which is applied in multicast routing when nodes are added to the field of multicast trees, can solve problems such as inapplicability of cognitive ad-hoc networks, and achieve the effect of low complexity and low time.

Inactive Publication Date: 2010-09-15
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

Therefore, the routing protocol of ad hoc network is not suitable for cognitive ad hoc network
Moreover, most of the routing protocols currently proposed for cognitive ad hoc networks are unicast routing, and multicast routing is still a blank field.

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  • Energy optimization multicast routing method based on cognitive self-organizing network
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  • Energy optimization multicast routing method based on cognitive self-organizing network

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] Before describing in detail, the following definitions are explained:

[0039] Cumulative delay: The calculation of cumulative delay in cognitive networks was proposed by Cheng Geng et al. in the paper "Research on the Joint Strategy of Cognitive Radio Network Routing and Spectrum Allocation". This paper proposes a joint strategy of on-demand routing and spectrum allocation for multi-hop cognitive networks, takes delay as the routing measure, and derives related calculation formulas. It is also pointed out that the end-to-end cumulative delay in the cognitive network includes the delay (DN) at the cross node and the delay (DP) caused by the current path. The switching delay depends on the number of data streams and frequency band switching times, while the path delay is determined by the number of hops and the respective operating frequency bands of the nodes. ...

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Abstract

The invention belongs to a routing technology in the cognitive self-organizing network communication, more particularly relates to a method for building a time delay constrained energy optimization multicast tree and relating to frequency spectrum selection. The method comprises the following steps of: selecting a proper frequency band communicated with the on-tree node according to a calculated accumulated time delay and an adjacent node of the on-tree node; selecting nodes with small weight values to add into the tree by adopting different selection function calculation weight values according to whether a node of the next hop of a candidate node is a destination node or not; and confirming that all nodes are added into the multicasting tree and finishing the tree building. The method is used for building the multicasting tree by adopting a time delay-energy function mode, can make the consumed energy of the node in a network reach optimization and the time delay from an original source to the target node satisfy time-delay upper limit and can be suitable in the cognitive self-organizing network environment by adopting a frequency spectrum selection mechanism. In the method, the time complexity of building the multicasting tree is lower, that is to say, the multicasting tree which satisfies conditions can be rapidly built.

Description

technical field [0001] The invention belongs to the routing technology in cognitive self-organizing network communication, and specifically relates to a method for adding nodes to a multicast tree in multicast routing. Background technique [0002] Cognitive Radio [0003] As stated in the FCC report, current spectrum utilization is extremely uneven. Some frequency bands are heavily utilized while others are used intermittently. The utilization rate of most licensed frequency bands is between 15% and 85%. On the contrary, the unlicensed frequency band of wireless communication is very crowded and cannot meet the ever-increasing demand. In order to solve the problem of frequency band shortage, Dr. Joseph Mitola proposed the concept of cognitive radio. The key to cognitive radio is to detect spectral holes and allow secondary users to access them intelligently. This is an effective way to improve spectrum utilization. [0004] In cognitive ad hoc networks, secondary user...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W40/10H04W84/18
CPCY02D30/70
Inventor 周贤伟苗许娜刘臻臻
Owner UNIV OF SCI & TECH BEIJING
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