Abstract
The link failure due to the secondary users exiting the licensed channels when primary users reoccupy the licensed channels is very important in cognitive wireless mesh networks (CWMNs). A multipath routing and spectrum allocation algorithm based on channel interference and reusability with Quality of Service (QoS) constraints in CWMNs (MRIR) was proposed. Maximizing the throughput and the acceptance ratio of the wireless service is the objective of the MRIR. First, a primary path of resource conservation with QoS constraints was constructed, then, a resource conservation backup path based on channel interference and reusability with QoS constraints was constructed. The MRIR algorithm contains the primary path routing and spectrum allocation algorithm, and the backup path routing and spectrum allocation algorithm. The simulation results showed that the MRIR algorithm could achieve the expected goals and could achieve a higher throughput and acceptance ratio.
Highlights
A Cognitive Wireless Mesh Network (CWMN) is a kind of Wireless Mesh Network (WMN) that uses Cognitive Radio (CR) [1]
This can save the use of network resources, and improve the acceptance ratio of wireless requests and network throughput; (3) A multi-path routing and spectrum allocation algorithm (MRIR) with Quality of Service (QoS) constraints is proposed based on channel interference and reusability, which contains the primary path construction and spectrum allocation algorithm, as well as the backup path configuration and spectrum allocation algorithm
Aiming at the problem of link failure in CWMNs, this paper studied the problem of multipath routing and spectrum allocation, which aims to improve the network throughput and the wireless request acceptance ratio, and satisfy the QoS constraint
Summary
A Cognitive Wireless Mesh Network (CWMN) is a kind of Wireless Mesh Network (WMN) that uses Cognitive Radio (CR) [1]. The differences between the available channels are considered, which means that different channels have different bandwidths; (2) Based on the characteristics of the primary and the backup path that are not transmitted simultaneously, when the backup path is constructed, the link with a higher interference to the primary path and with a higher reuse degree has a higher priority selected for constructing the backup path This can save the use of network resources, and improve the acceptance ratio of wireless requests and network throughput; (3) A multi-path routing and spectrum allocation algorithm (MRIR) with QoS constraints is proposed based on channel interference and reusability, which contains the primary path construction and spectrum allocation algorithm, as well as the backup path configuration and spectrum allocation algorithm.
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