Parth H. Pathak
ABSTRACT
With recent advances in Software-defined Radios (SDRs), it has indeed became feasible to dynamically adapt the channel widths at smaller time scales. Even though the advantages of varying channel width (e.g. higher link throughput with higher width) have been explored before, as with most of the physical layer settings (rate, transmission power etc.), naively configuring channel widths of links can in fact have negative impact on wireless network performance. In this paper, we design a cross-layer channel width assignment scheme that adapts the width according to the backlog of link-layer queues. We leverage the benefits of varying channel widths while adhering to the invariants of back-pressure utility maximization framework. The presented scheme not only guarantees improved throughput and network utilization but also ensures bounded buffer occupancy and fairness.
- U. Akyol, M. Andrews, P. Gupta, J. Hobby, I. Saniee, and A. Stolyar. Joint scheduling and congestion control in mobile ad-hoc networks. In IEEE INFOCOM 2008.Google Scholar
Cross Ref
- R. Chandra, R. Mahajan, T. Mosci., R. Raghavendra, and P. Bahl. A case for adapting channel width in wireless networks. ACM SIGCOMM 2008. Google ScholarDigital Library
- L. Tassiulas and A. Ephremides. Stability properties of constrained queueing systems and scheduling policies for maximum throughput in multihop radio networks. Automatic Control, IEEE Transactions on, 1992.Google Scholar
Index Terms
- Channel width assignment using relative backlog: extending back-pressure to physical layer
Recommendations
A novel contention-based MAC protocol with channel reservation for wireless LANs
In this paper, we present a novel contention-based medium access control (MAC) protocol, namely, the Channel Reservation MAC (CR-MAC) protocol. The CR-MAC protocol takes advantage of the overhearing feature of the shared wireless channel to exchange ...
Enhancing channel utilization by improving media access coordination in wireless local area networks
Distributed coordination function (DCF) is the basis protocol for IEEE 802.11 standard wireless local area networks. It is based on carrier sense multiple access with collision avoidance (CSMA-CA) mechanism. DCF uses backoff process to avoid collisions ...
Modeling of collision avoidance protocols in single-channel multihop wireless networks
Although there has been considerable work on the performance evaluation of collision avoidance schemes, most analytical work is confined to single-hop ad hoc networks or networks with very few hidden terminals. We present the first analytical model to ...
Comments