Adaptive Zone Selection Techniques with an Adaptive Modulation for indoor Wireless Packet Radio Systems

摘要

This paper proposes an adaptive zone selec- tion (AZS) scheme with adaptive modulation for wireless packet transmission systems to achieve high throughout and low delay performance even under non-uniform traffic conditions. In the proposed system, based on the measurement of the propagation path characteristics to each access point (AP) as well as broad- casted blocking probability information form each AP, a terminal autonomously selects an AP and modulation parameters that give the minimum transmission failure probability determined by both the call blocking rate due to lack of radio resource and packet error rate due to server channel conditions. Computer simulation confirms that the proposed scheme greatly improves throughout and delay performances especially under non-uniform traffic conditions.