mac protocol in cognitive radio
MAC-layer misbehaviors in multi-hop cognitive radio networks
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networks. We use simulation data to evaluate the impact of such misbehaviors in terms of network availability and fairness. Index Terms MAC protocol , network security, cognitive radio , channel negotiation, multi-hop networks
An energy-efficient MAC protocol for QoS provisioning in cognitive radio ad hoc networks
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The explosive growth in the use of real-time applications on mobile devices has resulted in new challenges to the design of medium access control (MAC) protocols for ad hoc networks. In this paper, we propose an energy efficient cognitive radio (CR) MAC protocol
A new MAC protocol with control channel auto-discovery for self-deployed cognitive radio networks
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The old-dated spectrum regulations have lead to a spectrum shortage problem. This problem is actually not real since many frequency bands are not utilized efficiently. Spectrum Pooling and unlicensed spectrum access as enabled by Cognitive Radios (CR) can
Alternating renewal theory-based MAC protocol for cognitive radio networks
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We propose a MAC protocol for cognitive radioenabled secondary networks, which opportunistically use the channels of CSMA/CA-based primary network. We have considered IEEE 802.11 WLAN as a de facto primary network in ISM band. Our study
Hybrid common control channel based MAC protocol for cognitive radio Ad-Hoc networks
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CR node synchronization is one of the crucial problems in dynamic channel availability of Cognitive radio ad-hoc networks. Most state-of-the-art CR MAC protocols either use In- band or Out-of-band overlay based common control channel (CCC) design for network
Design of an efficient MAC protocol for opportunistic cognitive radio networks
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Cognitive radio technology has been developed in recent years to make efficient use of the wireless spectrum especially for opportunistic spectrum access. Cognitive radio technology enables the secondary (cognitive) users to use the unused licensed spectrum of the primary
Analysis of Channel Access Delay in CR- MAC Protocol for Ad Hoc Cognitive Radio Wireless Sensor Networks without a Common Control Channel.
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Ad hoc cognitive radio wireless sensor networks allow secondary wireless sensor nodes to recognize spectrum opportunities and transmit data. Most existing protocols proposed for ad hoc cognitive radio wireless sensor networks require a dedicated common control channel scheduling at MAC layer, over the wire- less cognitive radio networks. Under the proposed CREAM- MAC protocol , each secondary user is equipped with a cognitive radio -enabled transceiver and multi- ple channel sensors
High throughput spectrum-aware routing for cognitive radio networks
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In SPEAR, each cognitive radio follows 85ms time slots with two 5ms guard- band, with channel switching delay of 80us. The control radio uses the 802.11 CSMA/CA MAC protocol . To simulate spectrum heterogeneity, we use the scenario of Figure 2
Common control channel saturation detection and enhancement in cognitive radio networks
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Mac protocol plays an important role in spectrum opportunities utilization, primary users interference management and secondary users coordination in cognitive radio networks. The Common control channel is one of the most challenging issues in CR networks
A Medium Access Protocol for Cognitive Radio Networks Based on Packets Collision and Channels Usage
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Time (ATT). A real-time MAC protocol for cognitive radio networks is presented in [15], this protocol provides a deterministic medium access and opportunistic spectrum allocation for heterogeneous traffic load. The scheduling
A Cognitive Radio Prototype Operating in UHF TV Bands
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demonstrates the following: (1) Robust sensing of television (ATSC and NTSC) signals and wireless microphone signals, which is a necessary first step for implementation of cognitive radio in the television bands. (2) Distributed MAC protocol implementation demonstrating
Cognitive Radio Based Jamming Resilient Multi-channel MAC Protocol for Wireless Network
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Radio jamming attack is the most effective and easiest Denial-of Service (DOS) attack in wireless network. In this paper, we proposed a multi-channel MAC protocol to mitigate the jamming attacks by using cognitive radio . The Cognitive Radio (CR) technology supports
Event-driven hybrid MAC protocol for a two-tier cognitive wireless sensor network: design and implementation.
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1 Event-driven hybrid MAC protocol for a two-tier cognitive wireless sensor network: design and implementation Abstract: In this paper, an integrated hardware and software system for a cognitive - radio wireless sensor network (CR-WSN) is designed and implemented for event
Throughput Enhancement of Cognitive Radio Networks through Improved Frame Structure
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users. In this paper, a modified self-scheduling multi-channel cognitive radio MAC protocol based on cooperative communication is proposed to enhance the network throughput by modifying its frame structure. The proposed
Transmission protocols in cognitive radio mesh networks
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No. pp. 1061-107 2007. [17] Z. Htike, J. Lee, and CS Hong, A MAC Protocol for Cognitive Radio Networks with Reliable Control Channels Assignment , Proceedings of the International Conference on Information Networking, pp. 81-8 2012
IEEE 802.22: An introduction to the first wireless standard based on cognitive radios
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Index Terms Cognitive radio , incumbent, sensing, spectrum agility, IEEE 802.2 coexistence B.2 Network Entry and Initialization Generally, when there is a reliance on a centralized BS for access, network entry is a straightforward process in any MAC protocol
Spectrum sensing techniques in cognitive radio networks: A survey
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For synchronization, the MAC protocol must be designed with provision for spectrum handoff information exchange. 4. Spectrum Sensing A major challenge in cognitive radio is that the secondary users need to detect the presence of primary users in a licensed spectrum and
A survey on the communication protocols and security in cognitive radio networks
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The assumption of co-existence with a WLAN is questionable because WLANs typically operate in the unlicensed ISM bands (eg, 2.4 GHz) and cognitive radio networks operate in licensed spectrum bands. The DNG- MAC protocol uses the TDMA (Time division multiplexing
Performance evaluation of AODV routing protocol in cognitive radio Ad-hoc network
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[17] KR Chowdhury, MD Felice, SEARCH: a routing protocol for mobile cognitive radio ad-hoc networks,200 313-320. [18] C. Cordeiro, K. Challapali, C-MAC: a cognitive MAC protocol for multi-channel wireless networks, in: Proceedings of the IEEE DySPAN,200 147 157 CSE PROJECTS