Analyzing and Addressing the Impact of Network Protocols on Collaborative Beamforming in Wireless Networks
Date Issued
2007
Date
2007
Author(s)
Kuo, Kuan-Lin
DOI
en-US
Abstract
Collaborative beamforming is an important methodology in the field of cooperative communications. One node cannot transmit message to far distances, but collaborative beamforming can coordinate distributed nodes to transmit signals to achieve
this goal. To conduct collaborative beamforming, several protocols must be executed, including localization protocol, data dissemination protocol, and time synchronization protocol. The purpose of localization protocol is to acquire relative distances between nodes, and we take the advantage of data dissemination protocol to share message with all nodes. At last, time synchronization protocol is conducted to force nodes to transmit signals at presumed time. However, these protocols are often limited to their complexities or the environment and some “protocol artifacts” appear,
such as the time synchronization error, the location error, and message vanishment. Although related work about collaborative beamforming has tried to analyze and discuss
the impact of protocol artifacts, there is no unified math framework. There is no literature to compensate the system degradation due to artifacts, either. This thesis introduces a unified math framework to analyze the influence of protocol
artifacts, including mainbeam degradation, beam pointing error, and half-power beamwidth augmentation. We discover that the artifact of localization protocol influences
the system performance the most in general frequency bands. By suitable arrangement or protocol selection of nodes, we can avoid the impact of protocol artifacts effectively. We hope by analyzing and addressing the protocol artifacts, prospective system designers can have a better understanding on collaborative beamforming.
Subjects
合作式波束成型
協定失真
collaborative beamforming
protocol artifacts
Type
thesis