Improving Goodput by Relaying in Transmission-Power-Limited Wireless Systems

In wireless communication systems, the capacity of a cell (the amount of correctly delivered traffic in unit time) is a precious resource that can not be arbitrarily increased. This paper looks at the consequences limited transmission power has for the cell capacity and how these limitations can be overcome by using relaying between terminals. The challenge faced here is that we require the relaying terminal not only to transmit relayed traffic but also traffic originated locally. The key technique to handle this challenge is to dynamically adapt transmission power and in particular modulation and hence error susceptibility depending on the actual configuration. We show that it is possible to increase the capacity in certain configurations considerably; critical parameters are the location of terminals, the path-loss coefficient, and the noise. Under certain fairness constraints (all terminals must obtain a minimum share of total goodput), relaying can provide improvements of up...

• Type: Conference
• Year: 2001
• Where: GI
• Authors: Seble Mengesha, Holger Karl, Adam Wolisz
• Keywords: Consequences Limited Transmission, GI 2001, Theoretical Computer Science, Transmission Power, Wireless Communication Systems