Channel width assignment using relative backlog: extending back-pressure to physical layer

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. Categories and Subject Descriptors C.2.1 [Computer-Communication Networks]: Network Architecture and Design General T...

• Type: Journal
• Year: 2012
• Where: MOBIHOC
• Authors: Parth H. Pathak, Sankalp Nimbhorkar, Rudra Dutta
• Keywords: Algorithm Performance, Computer Communication Networks, Computer Networks, Design Algorithm, MOBIHOC 2012