| 1. |
- Fowler, Scott, et al.
(författare)
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Adaptive Sending Rate Over Wireless Mesh Networks Using SNR
- 2011
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Ingår i: International Journal of Wireless Networks and Broadband Technologies (IJWNBT). - : IGI Global. - 2155-6261 .- 2155-627X. ; 1:3, s. 30-48
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Tidskriftsartikel (refereegranskat)abstract
- Wireless Mesh Networks (WMNs) have emerged as a key technology for the next generation ofwireless networking. Instead of being another type of ad-hoc networking, WMNs diversify the capabilities of ad-hoc networks. Several protocols that work over WMNs include IEEE802.11a/b/g, 802.15, 802.16 and LTE-Advanced. To bring about a high throughput under varying conditions, these protocols have to adapt their transmission rate. In this paper, we have proposed a scheme to improve channel conditions by performing rate adaptation along with multiple packet transmission using packet loss and physical layer condition. Dynamic monitoring, multiple packet transmission and adaptation to changes in channel quality by adjusting the packet transmission rates according to certain optimization criteria provided greater throughput. The key feature of the proposed method is the combination of the following two factors: 1) detection of intrinsic channel conditions by measuring the fluctuation of noise to signal ratio via the standard deviation, and 2) the detection of packet loss induced through congestion. We have shown that the use of such techniques in a WMN can significantly improve performance in terms of the packet sending rate. The effectiveness of the proposed method was demonstrated in a simulated wireless network testbed via packet-level simulation.
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| 2. |
- Moltchanov, Dmitri, et al.
(författare)
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Synchronous Relaying in Vehicular Ad-Hoc Networks
- 2011
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Ingår i: International Journal of Wireless Networks and Broadband Technologies. - Hershey : IGI Global. - 2155-6261 .- 2155-627X. ; 1:2, s. 36-41
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, the authors propose a simple concept for emergency information dissemination in vehicular ad-hoc networks. Instead of competing for the shared wireless medium when transmitting the emergency information, the authors’ proposed method requires nodes to cooperate by synchronizing their transmissions. The proposed scheme is backward compatible with IEEE 802.11p carrier sense multiple access with collision avoidance. The authors also briefly address some of the implementation issues of the proposed scheme.
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| 3. |
- Andreev, Sergey, et al.
(författare)
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Performance Evaluation of a Three Node Client Relay System
- 2011
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Ingår i: International Journal of Wireless Networks and Broadband Technologies. - Hershey, PA : IGI Global. - 2155-6261. ; 1:1, s. 73-84
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, the authors examine a client relay system comprising three wireless nodes. Closed-form expressions for mean packet delay, as well as for throughput, energy expenditure, and energy efficiency of the source nodes are also obtained. The precision of the established parameters is verified by means of simulation.
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