Link Capacity Based Channel Assignment (LCCA) for Cognitive Radio Wireless Mesh Networks

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
Wajahat Maqbool ◽  
Sharifah K. Syed Yusof ◽  
N. M. Abdul Latiff ◽  
Hashim S. ◽  
Rahat U. ◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Wireless Mesh Networks ◽  
Channel Assignment ◽  
Mesh Networks ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Link Capacity ◽  
Wireless Mesh ◽  
User Activity ◽  
Decision Engine

Cognitive radio wireless mesh network (CRWMN) is expected as an upcoming technology with the potential advantages of both cognitive radio (CR) and the wireless mesh networks (WMN). In CRWMN, co-channel interference is one of the key limiting factors that affect the reception capabilities of the client and reduce the achievable transmission rate. Furthermore, it increases the frame loss rate and results in underutilization of resources. To maximize the performance of such networks, interference related issues need to be considered. Channel assignment (CA) is one of the key techniques to overcome the performance degradation of a network caused by the interferences. To counter the interference issues, we propose a novel CA  technique which is based on link capacity, primary user activity and secondary user activity. These three parameters are fed to the proposed weightage decision engine to get the weight for each of the stated parameters. Thus, the link capacity based channel assignment (LCCA) algorithm is based on the weightage decision engine. The end-to-end delay, packet delivery ratio and the throughput is used to estimate the performance of the proposed algorithm. The numerical results demonstrate that the proposed algorithm is closer to the optimum resource utilization. 

Opportunistic Frame Forwarding in Wireless Mesh Networks

2015 ◽  
Vol 764-765 ◽  
pp. 941-945
Author(s):  
Shih Tsung Liang ◽  
Bo Yi Song ◽  
Yu Yao Su
Keyword(s):  
Wireless Mesh Networks ◽  
Mesh Networks ◽  
Opportunistic Routing ◽  
Wireless Channel ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Delivery Probability ◽  
Wireless Mesh ◽  
Deterministic Routing ◽  
The One

Opportunistic routing has been shown to achieve the high throughput of the wireless mesh network with lossy channels. Different from deterministic routing mechanisms in which a frame is <em>transmitted</em> and forwarded along with a fixed and predetermined <em>path</em>, the opportunistic routing technique allows multiple nodes hearing the frame to form the forwarder set containing promising candidates for the frame forwarding. Existing opportunistic routing protocols typically choose among forwarding candidates based on the decision made from the transmitter disregarding the current loads in candidates. In this paper, the opportunistic frame forwarding mechanism with considering backlog of frames among forwarders is proposed and analyzed. Specifically, in addition to take into account the delivery probability, our proposal restricts members of the forwarder set for a given transmitter to those wireless nodes whose transmission range covers one another and makes the true forwarder picked from the forward set of a given transmitting frame being the one who gains access to wireless channel for the frame before others do. Therefore, the efficient and load-balanced opportunistic routing for wireless mesh networks can be achieved. Analytic results show that the proposed method compared to the deterministic routing methodology can achieve the high frame delivery ratio.

scholarly journals Joint Channel Assignment and Routing in Multiradio Multichannel Wireless Mesh Networks: Design Considerations and Approaches

2016 ◽  
Vol 2016 ◽  
pp. 1-24 ◽  
Author(s):  
Omar M. Zakaria ◽  
Aisha-Hassan A. Hashim ◽  
Wan H. Hassan ◽  
Othman O. Khalifa ◽  
M. Azram ◽  
...  
Keyword(s):  
Wireless Mesh Networks ◽  
Channel Assignment ◽  
Mesh Networks ◽  
Network Capacity ◽  
Mesh Network ◽  
Future Research ◽  
Wireless Mesh ◽  
Traffic Distribution ◽  
Future Research Directions ◽  
Joint Channel

Multiradio wireless mesh network is a promising architecture that improves the network capacity by exploiting multiple radio channels concurrently. Channel assignment and routing are underlying challenges in multiradio architectures since both determine the traffic distribution over links and channels. The interdependency between channel assignments and routing promotes toward the joint solutions for efficient configurations. This paper presents an in-depth review of the joint approaches of channel assignment and routing in multiradio wireless mesh networks. First, the key design issues, modeling, and approaches are identified and discussed. Second, existing algorithms for joint channel assignment and routing are presented and classified based on the channel assignment types. Furthermore, the set of reconfiguration algorithms to adapt the network traffic dynamics is also discussed. Finally, the paper presents some multiradio practical implementations and test-beds and points out the future research directions.

QoS Provisioning for Multicast Routing and Channel Assignment in Wireless Mesh Network

2021 ◽  
pp. 1018-1036
Author(s):  
Abira Banik ◽  
Abhishek Majumder
Keyword(s):  
Quality Of Service ◽  
Wireless Mesh Networks ◽  
Channel Assignment ◽  
Multicast Routing ◽  
Mesh Networks ◽  
End Users ◽  
Mesh Network ◽  
Qos Provisioning ◽  
Wireless Mesh

The scope of development and research in the field of wireless mesh networks (WMN) is wide open and the focus has also been widened from simple channel assignment to multicast routing further moving towards providing quality of service (QoS) to the end users. The nodes in the network are of multi radio multi channel (MRMC) model. The efficiency of the network is termed as quality of service. For providing the QoS to the end users different techniques have been evolved which caters situations as QoS provisioning in the channel assignment phase, QoS provisioning in the multicast routing phase, and QoS provisioning in the channel assignment and multicast routing phase. This chapter presents a detailed study of QoS provisioning in WMN. It also classifies the techniques as: QoS provision in channel assignment, QoS provision in multicast routing and QoS provision in channel assignment as well as multicast routing.

scholarly journals The Design and Implementation of the XWCETT Routing Algorithm in Cognitive Radio Based Wireless Mesh Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
L. M. Kola ◽  
M. Velempini
Keyword(s):  
Cognitive Radio ◽  
Wireless Mesh Networks ◽  
Routing Protocol ◽  
Routing Protocols ◽  
High Speed ◽  
Mesh Networks ◽  
Routing Algorithm ◽  
Delivery Ratio ◽  
Broadband Internet ◽  
Wireless Mesh

The Wireless Mesh Networks (WMNs) technology has recently emerged as a promising high-speed wireless technology, which provides the last mile broadband Internet access and delivers integrated wireless communication solutions. Integrating the traditional wireless with new wireless technologies such as cognitive radio (CR) technology creates a platform for high-speed broadband communication. In a multihop ad hoc cognitive radio network (CRN) environment, the performance of the network is degraded by the routing protocols, which are adapted from the traditional wireless networks. In an endeavor to optimize the performance of the CRNs, existing routing protocols can be adapted and optimized. Secondly, new dynamic routing protocols can be designed to meet the requirements of CRNs. This paper investigates the existing routing protocols in WMNs and proposes a new routing protocol called extended Weighted Cumulative Expected Transmission Time (xWCETT). The xWCETT routing protocol was evaluated through network simulations using the NS 2. Its performance was evaluated with respect to the end-to-end average latency, the throughput, jitter, packet delivery ratio, and the normalized routing load. The comparative evaluation results show that the xWCETT achieves superior results in terms of average throughput, latency, and the normalized routing load.

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