White Space Networking with Wi-Fi like Connectivity

被引：117

作者：

Bahl, Paramvir ^{[1
]}

Chandra, Ranveer ^{[1
]}

Moscibroda, Thomas ^{[1
]}

Murty, Rohan ^{[2
]}

Welsh, Matt ^{[2
]}

机构：

[1] Microsoft Res, Redmond, WA USA

[2] Harvard Univ, Cambridge, MA 02138 USA

来源：

ACM SIGCOMM COMPUTER COMMUNICATION REVIEW | 2009年 / 39卷 / 04期

关键词：

Algorithms; Design; Experimentation; white spaces; channel width; Wi-Fi; dynamic spectrum access; cognitive radios;

D O I：

10.1145/1594977.1592573

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Networking over UHF white spaces is fundamentally different from conventional Wi-Fi along three axes: spatial variation, temporal variation, and fragmentation of the UHF spectrum. Each of these differences gives rise to new challenges for implementing a wireless network in this band. We present the design and implementation of WhiteFi, the first Wi-Fi like system constructed on top of UHF white spaces. WhiteFi incorporates a new adaptive spectrum assignment algorithm to handle spectrum variation and fragmentation, and proposes a low overhead protocol to handle temporal variation. WhiteFi builds on a simple technique, called SIFT, that reduces the time to detect transmissions in variable channel width systems by analyzing raw signals in the time domain. We provide an extensive system evaluation in terms of a prototype implementation and detailed experimental and simulation results.

引用

页码：27 / 38

页数：12