tailieunhanh - Báo cáo hóa học: "Research Article Borrowed Channel Relaying: A Novel Method to Improve Infrastructure Network Throughput"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Borrowed Channel Relaying: A Novel Method to Improve Infrastructure Network Throughput | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 174730 12 pages doi 2009 174730 Research Article Borrowed Channel Relaying A Novel Method to Improve Infrastructure Network Throughput Aaron Jow and Curt Schurgers Electrical and Computer Engineering University of California San Diego La Jolla CA 92093 USA Correspondence should be addressed to Curt Schurgers curts@ Received 30 April 2009 Revised 31 August 2009 Accepted 25 November 2009 Recommended by Ingrid Moerman From a networking perspective the chief impediment to throughput enhancement in infrastructure networks such as is the access point bottleneck all traffic to through and from the network has to pass through this access point. When some clients experience poor channel conditions and therefore communicate at a lower data rate this severely impacts the throughput of all clients in the network. Recently multihop relaying in combination with leveraging multiple data rates was proposed to alleviate this problem. However our experiments indicate that gains from these techniques are very small with realistic positioning of clients. Instead we propose a novel scheme that combines relaying and multiple data rate capabilities with the concept of channel borrowing. Our protocol BCR Borrowed Channel Relaying utilizes unused capacity from neighboring access points and is able to achieve network throughput gains of 20 to 60 depending on the scenario. Although we use style networks to illustrate this concept this general principle can be applied to any infrastructure network with receivers capable of tuning to more than one channel. Copyright 2009 A. Jow and C. Schurgers. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Current wireless .