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2007

Sticky CSMA/CA: Implicit synchronization and real-time QoS in mesh networks

8 years 11 months ago
Sticky CSMA/CA: Implicit synchronization and real-time QoS in mesh networks
We propose a novel approach to QoS for real-time traffic over wireless mesh networks, in which application layer characteristics are exploited or shaped in the design of medium access control. Specifically, we consider the problem of efficiently supporting a mix of Voice over IP (VoIP) and delay-insensitive traffic, assuming a narrowband physical layer with CSMA/CA capabilities. The VoIP call carrying capacity of wireless mesh networks based on classical CSMA/CA (e.g., the IEEE 802.11 standard) is low compared to the raw available bandwidth, due to lack of bandwidth and delay guarantees. Time Division Multiplexing (TDM) could potentially provide such guarantees, but it requires fine-grained network-wide synchronization and scheduling, which are difficult to implement. In this paper, we introduce Sticky CSMA/CA, a new medium access mechanism that provides TDM-like performance to real-time flows without requiring explicit synchronization. We exploit the natural periodicity of VoIP ...
Sumit Singh, Prashanth Aravinda Kumar Acharya, Upa
Added 08 Dec 2010
Updated 08 Dec 2010
Type Journal
Year 2007
Where ADHOC
Authors Sumit Singh, Prashanth Aravinda Kumar Acharya, Upamanyu Madhow, Elizabeth M. Belding-Royer
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