QoS Routing in Wireless Mesh Networks with Cognitive Radios

Hincapié, Roberto; Tang, Jian; Xue, Guoliang; Ramírez, Bustamante

doi:10.1109/glocom.2008.ecp.933

Cited by 35 publications

(13 citation statements)

References 17 publications

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“…For example, the author in Ref. [112] investigates a QoS routing in wireless cognitive mesh networks, containing routing selection, channel allocation and scheduling, and it also presents a distributed routing protocol, which could choose routing and request allocation resources for connection to satisfy the end to end bandwidth requirements. In Ref.…”

Section: Cognitive Routing Research Contentsmentioning

confidence: 99%

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A dynamic spectrum access network based on cognitive radio

Ren

Wang

2010

J. Electron.(China)

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Dynamic spectrum access technologies based on Cognitive Radio (CR) is under intensive research carried out by the wireless communication society and is expected to solve the problem of spectrum scarcity. However, most enabling technologies related to dynamic spectrum access are considered individually. In this paper, we consider these key technologies jointly and introduce a new implementation scheme for a Dynamic Spectrum Access Network Based on Cognitive Radio (DSAN-BCR). We start with a flexible hardware platform for DSAN-BCR, as well as a flexible protocol structure that dominates the operation of DSAN-BCR. We then focus on the state of the art of key technologies such as spectrum sensing, spectrum resources management, dynamic spectrum access, and routing that are below the network layer in DSAN-BCR, as well as the development of technologies related to higher layers. Last but not the least, we analyze the challenges confronted by these mentioned technologies in DSAN-BCR, and give the perspectives on the future development of these technologies. The DSAN-BCR introduced is expected to provide a system level guidance to alleviate the problem of spectrum scarcity.

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Section: Cognitive Routing Research Contentsmentioning

confidence: 99%

“…For example, the study in Refs. [112] and [116] comprehensively consider network throughput and end to end performance.…”

Section: Cognitive Routing Research Contentsmentioning

confidence: 99%

A dynamic spectrum access network based on cognitive radio

Ren

Wang

2010

J. Electron.(China)

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“…To derive the interference-impact ratio [9], the influence of a link , ij  working at channel m on the potential neighboring links is investigated. pt is independent among all usable channels [9].…”

Section: B Link-channel Interference-impact Ratiomentioning

confidence: 99%

A channel assignment scheme for reliable routing in cognitive radio networks

Zhao

Zhang

2014

2014 IEEE 27th Canadian Conference on Electrical and Computer Engineering (CCECE)

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Since secondary users (SUs) should vacate the channel immediately after detecting the reappearance of primary users (PUs) in cognitive radio networks (CRNs), the route reliability is a distinctive challenge for routing in CRNs. Furthermore, it is preferable to select a route with less negative influence on other current or latish sessions, while meeting the throughput requirement of an SU session. To investigate the challenges of route reliability, we study the channel assignment problem for a route in CRNs with less negative influence. A channel assignment scheme is proposed to choose the available channel for obtaining a new route with better reliability and near-optimal route throughput while minimizing negative influence on other existing routes. The simulation results demonstrate that the proposed scheme achieves considerable improvement over existing schemes in both route reliability and throughput.

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“…Based on different assumptions of the spectrum-knowledge availability (i.e., full spectrum knowledge and local spectrum knowledge), a number of spectrum-aware routing schemes have been proposed for the multi-hop CRNs [1]. These works usually adopt the existing network layer protocols (e.g., AODV [2] and DSR [3]) and address the DSA characteristics by their own cross-layer performance metrics (e.g., channel switching delay, interference to the PU) and path discovery/maintenance algorithms [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Routing based on layered stochastic games for multi-hop cognitive radio networks

Wang

Kwasinski

Han

2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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This paper proposes a distributed routing mechanism for the multi-hop Cognitive Radio Networks (CRNs) over multiple primary channels. The Secondary Users (SUs) attempts to utilize the channels and minimize their delay along the route while avoiding causing interference to the Primary Users (PUs). In order to address the problem of time-varying channel condition due to the PU dynamics, the route-selection process is modeled as a global Markov Decision Process (MDP). We show that such a global routing MDP can be decomposed into the layered MDPs, in which the interactions between neighbor SUs with their local next-hop selection are modeled as the local stochastic games. By applying reinforcement learning with utility based fictitious play, the best response of each SU can be learned from the local game with the only need for the information exchange from next-hop SUs. The proposed algorithm is evaluated through simulations and is shown to be effective in reducing the delays for multiple flows in the CRN.

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QoS Routing in Wireless Mesh Networks with Cognitive Radios

Cited by 35 publications

References 17 publications

A dynamic spectrum access network based on cognitive radio

A dynamic spectrum access network based on cognitive radio

A channel assignment scheme for reliable routing in cognitive radio networks

Routing based on layered stochastic games for multi-hop cognitive radio networks

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