Packet-Loss Distinguishing Based Link Adaptation Enhancement for Wireless LANs

2011 ◽  
Vol 403-408 ◽  
pp. 1859-1864
Author(s):  
Yuan Cheng ◽  
Qiang Fan ◽  
Yun Shan Tang ◽  
Wei Wei Miao
Keyword(s):  
Local Area Networks ◽  
Link Adaptation ◽  
Local Area ◽  
Wireless Local Area Networks ◽  
System Throughput ◽  
Mac Layer ◽  
Medium Access ◽  
Adaptation Algorithm ◽  
Packet Losses ◽  
New Strategy

As we know, packet losses in wireless local area networks (WLANs) are due to collisions or link errors. In this paper, a new strategy that distinguishes the cause of packet losses in medium access control (MAC) layer is introduced. Based on the strategy, link adaptation algorithms, including the payload size adaptation algorithm and the data rate adaptation algorithm, are proposed and employed in WLANs. Simulation results show that both algorithms increase system throughput significantly.

scholarly journals Queuing Analysis for IEEE 802.11e Networks in Non-Saturation Environments

10.5772/50911 ◽  
2012 ◽  
Vol 9 (1) ◽  
pp. 12 ◽  
Author(s):  
Eui-Jik Kim ◽  
Sungkwan Youm ◽  
Hyo Hyun Choi
Keyword(s):  
Probability Distribution ◽  
Service Time ◽  
Mac Protocol ◽  
Local Area Networks ◽  
Local Area ◽  
Wireless Local Area Networks ◽  
Distribution Model ◽  
Ieee 802.11E ◽  
Mac Layer ◽  
Traffic Loads

This paper presents an analytical model for the performance evaluation of an IEEE 802.11e network in non-saturation environments. We first characterize the probability distribution of the MAC layer packet service time. Based on the probability distribution model of the MAC layer packet service time, we then study the queuing performance of the wireless local area networks (WLANs) at different traffic loads based on the IEEE 802.11e MAC protocol. The numerical results show that we can choose a feasible number and bandwidth of the node which determines the system performance that a user demands.

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