Guest Editorial
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| Title | Guest Editorial |
| Authors | |
| Abstract | High-performance routing protocols and switching techniques play significant roles in provisioning quality of service in wireless networks. Given the dynamic nature of wireless networking environment and spectrum management, it is important that routing protocols be able to adapt their routing algorithms and switching fabrics be able to reconfigure their connections. The goal of this special issue is to publish the most recent results in the development of routing protocols and switching techniques for wireless networks and provide a forum for researchers to discuss and express their views on state-of-the-art solutions addressing routing and switching issues in wireless networks.The first article, by Harry Gao, et. al., proposes a high-speed data routing protocol in vehicular sensor networks. The protocol exhibits high speed data routing for sensor data collection through vehicles. One of the interesting findings is that large communication and storage capacities of a vehicle and its mobility facilitate this high-speed routing protocol compared with routing through hop-by-hop communication among sensors. The proposed protocol works in a realistic setting by collecting the real trace data through real implementation. In this paper, the authors also show through a simple secure symmetric key based protocol design and experiments the feasibility of secure data collection in a vehicular sensor networks. The second article, by Paulo Alexandre Correia da Silva Neves and Joel José Puga Coelho Rodrigues, studies the performance of the internet protocol (IP) over wireless sensor networks, Wireless sensor networks have many smart sensing nodes with computational, communication and sensing capabilities. Such smart sensors cooperate to gather relevant data and present it to the user. The connection of sensor networks and the Internet has been realized using gateway or proxy-based approaches. Historically, several routing protocols were specifically designed discarding IP. However, recent research, prototypes and even implementation tools show that it is possible to combine the advantages of IP access with sensor networks challenges. This paper presents the advantages and challenges of IP on wireless sensor networks, surveys the state-of-the-art with some implementation examples, and points further research topics in this area.The third article, by Simon Hauger, Michael Scharf, Jochen Kögel, and Chawapong Suriyajan, evaluates the router implementations for explicit congestion control schemes. The paper investigates the realization complexity of these router functions of two such schemes, the TCP Quick-Start extension and the Explicit Control Protocol (XCP). The focus lies on the implementation using a network processor. It is shown that the synchronization issues among parallel processing entities affects the router performance. Thus different synchronization mechanisms for highly parallel packet processing are developed. The prototype implementation on an Intel IXP network processor allows to quantify the impact on throughput and delay. The measurements reveal that the TCP Quick-Start extension and XCP processing are feasible at multiple Gbit/s line speed, with Quick-Start being simpler to scale. Finally, the implementation using programmable logic is also studied.The fourth article, by Joseph Y. Hui and Lingie Li, studies the first-fit scheduling for multi-stage packet switching networks. The authors first propose a first-fit scheduling algorithm for a single stage interconnection network. The first-fit algorithm is then extended to a three stage Clos network with scheduling in the first and third stages. It has proved that the algorithm applies to both cases of fixed length and variable length packets. Simulations are conducted to demonstrate the performance. A case is made that for multi-gigabit per second link speed, variable length packets should be used to simplify scheduling and avoid fragmentation, with acceptable increase in delay.The fifth article, by José Núñez-Martínez and Josep Mangues-Bafalluy, surveys the routing protocols for wireless mesh networks. Authors point out that the specific features of wireless mesh networks have a strong impact on the design of the routing protocols, which makes inefficient to port existing solutions from wired and other wireless networks. As a consequence, many alternative routing protocols have been proposed for wireless mesh networks. This survey paper presents the current state-of-the-art of routing protocols specifically designed for wireless mesh networks that try to maximize the throughput. First, a classification of routing protocols is provided. Then the routing architecture is decomposed into three major building blocks. Open research issues related to each building block are also discussed. Finally, the main characteristics of the building blocks for each relevant routing protocol in the taxonomy are summarized. The final article, by Chongqing Zhang, proposes cluster-based routing algorithms using spatial data correlation for wireless sensor networks. In densely deployed wireless sensor networks, spatial data correlations are introduced by the observations of multiple spatially proximal sensor nodes on a same phenomenon or event. These correlations bring significant potential advantages for the development of efficient strategies for reducing energy consumption. In this paper, spatial data correlations are exploited to design cluster-based routing algorithms of high data aggregation efficiency. The problem is defined to select a set of cluster heads as the weighted connected dominating set problem. Then the author develops a set of centralized approximation algorithms to select the cluster heads. Simulation results demonstrate the effectiveness and efficiency of the proposed algorithms.In closing, we would like to thank all anonymous reviewers who spent much of their precious time reviewing the papers. Their timely reviews and comments greatly helped us select the best papers for this special issue. We also thank all authors who have submitted their papers for consideration for this issue. Special thanks go to the Editor-in-Chief of Journal of Communications, Professor Kia Makki, and the Associate Editor-in-Chief, Dr. Haohong Wang, for offering us the opportunity to edit this special issue. |
| Publisher | ACADEMY PUBLISHER |
| Date | 2010-03-01 |
| Source | Journal of Communications Vol 5, No 3 (2010): Special Issue: High-performance Routing and Switching in Wireless Networks |
| Rights | Copyright © ACADEMY PUBLISHER - All Rights Reserved.To request permission, please check out URL: http://www.academypublisher.com/copyrightpermission.html. |