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Scheduling and Performance of Multihop Radio Networks with Multiuser Detection
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.
2002 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Incorporating multiuser detection (MUD) at receivers in a Multihop Packet Radio or ad-hoc Network has the potential to drastically improve performance. In this work, possible improvements are investigated and it is suggested that the Channel Coding Theorem be used for accurate modeling of the radio channel. With this model, MUD is shown to be more beneficial to ad-hoc networks employing spread-spectrum signals and in this case, the single-hop throughput increases linearly with the number of packets received. The delay performance of a narrow-band system employing Spatial-Time Division Multiple Access (S-TDMA) for scheduling is considered. MUD is incorporated into previously-proposed scheduling methods and a new method is proposed for generating the S-TDMA schedule by exploiting the detector. By simulation, MUD is shown to provide shorter length schedules, with the proposed method outperforming a systematic search. These results show that MUD typically provides a 20% reduction in the S-TDMA frame length, and thus decreases delay at low loads.

Place, publisher, year, edition, pages
2002.
National Category
Computer and Information Science
Research subject
SRA - ICT
Identifiers
URN: urn:nbn:se:kth:diva-28019OAI: oai:DiVA.org:kth-28019DiVA: diva2:383809
Conference
Swedish Workshop on Wireless Ad-hoc Networks
Note
QC 20110110Available from: 2011-01-05 Created: 2011-01-05 Last updated: 2011-01-10Bibliographically approved

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