Cognitive radio multicast routing method based on delay constraint
A cognitive radio and routing technology, applied in wireless communication, electrical components, transmission monitoring, etc., can solve problems such as not fully reflecting the characteristics of cognitive radio networks, and not giving corresponding solutions
Inactive Publication Date: 2012-12-05
UNIV OF SCI & TECH BEIJING
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In the document "Next Generation / Dynamic spectral access / cognitive radio wireless networks", Ian and Won discussed the problems that should be paid attention to in routing algorithm and protocol design in the cognitive radio environment, but did not give corresponding solutions; Wang and Zheng analyzed the relationship and mutual influence between route selection and spectrum selection in the document "Route and spectrum selection in dynamic spectrum networks", and proposed two design methods, decoupling design and joint design, but still did not fully reflect the cognitive radio Features of the network
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[0059] The specific implementation process of the present invention will be described below in conjunction with the accompanying drawings and examples.
[0060] like figure 2 As shown, it is assumed that the cognitive radio network is an undirected graph composed of nodes {S, A, B, C, D, E, F, G}, and the SoP of each node is also known. The parameters of the node are the channels through which it can pass. The source node is S, the destination node is {B, D, E, F}, and the parameters on the path are (cost value, delay value).
[0061] Starting from the source node S, we need to select a path from S to the target node. The selected path must meet the requirements of the cognitive radio network model, assuming that the delay upper limit Δ=5.
[0062] Step 1: Starting from the source node S, there are three paths {S→A}, {S→D} and {S→F}, calculated using the link selection function,
[0063] f SA = log ...
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The invention belongs to the field of a cognitive radio network, in particular to a design of a multicast routing protocol in a CR network. The invention comprises the following steps: 1. defining a cognitive radio network multicast routing model; 2. analyzing the characteristics of the cognitive radio network delay; 3. establishing a cognitive radio network frequency spectrum apportion model: i.e. a CR game model and a utility function; 4. resolving SoP information of each node in the network; and 5. according to the requirements, constructing a multicast routing tree which sequentially comprises the following steps: route discovery, route reply and route maintenance. The invention provides the construction process of the multicast routing method in the cognitive radio network, comprehensively considers delay and cost, and is simple and quick, effectively ensures the performance of the multicast tree, optimizes the utilization of the frequency spectrum, and is easy to be applied and realized in the cognitive radio network.
Description
Technical field: [0001] The invention belongs to the field of cognitive radio networks, and in particular relates to the design of a multicast routing protocol in a CR network. Background technique: [0002] Cognitive radio CR is a new technology to improve the utilization of radio communication spectrum. It originated from the groundbreaking work of Dr. JosephMitola in 1999. It is characterized by flexibility, intelligence, and reconfiguration. By sensing the external environment and using artificial intelligence The technology learns from the environment, and purposefully changes some operating parameters in real time (such as transmission power, carrier frequency, and modulation technology, etc.), so that its internal state adapts to the statistical changes of the received wireless signal, so as to realize wireless communication at any time and any place. Highly reliable communication and efficient use of limited wireless spectrum resources in heterogeneous network enviro...
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IPC IPC(8): H04W40/02H04W40/24H04B17/00H04W24/02
CPCY02D30/70
Inventor 周贤伟王超张培艳吴华怡
Owner UNIV OF SCI & TECH BEIJING