| Publisher | Rensselaer Polytechnic Institute | ||
|---|---|---|---|
| Format | 98.3KB PDF | Date added | 08 Nov 2006 |
| Topics | Mobile - Wireless Communications, Wi-Fi (802.11) | ||
| Downloads | 23 | ||
This paper presents an analytic model for evaluating the MAC layer queueing delays at wireless nodes using the Distributed Coordination Function of IEEE 802.11 MAC specifications. The model is valid for finite loads and can account for arbitrary arrival patterns, packet size distributions and number of nodes. Each node is modeled as a discrete time G/G/1 queue and the authors obtain closed form expressions for the delay and queue length characteristics at each node. The service time distribution is derived for the packets at each node while accounting for a number of factors including the channel access delay due to the shared medium, impact of packet collisions, the resulting backoffs as well as the packet size distribution.
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