Scheduling in Multi-Channel Wireless Networks

Date Added: Oct 2009
Format: PDF

The availability of multiple orthogonal channels in a wireless network can lead to substantial performance improvement by alleviating contention and interference. However, this also gives rise to non-trivial channel coordination issues. The situation is exacerbated by variability in the achievable data-rates across channels and links. Thus, scheduling in such networks may require substantial information-exchange and lead to non-negligible overhead. This provides a strong motivation for the study of scheduling algorithms that can operate with limited information while still providing acceptable worst-case performance guarantees. In this paper, the authors make an effort in this direction by examining the scheduling implications of multiple channels and heterogeneity in channel-rates.