scholarly journals Boosting VoIP Capacity via Service Differentiation in IEEE 802.11e EDCA Networks

2015 ◽  
Vol 11 (3) ◽  
pp. 235648 ◽  
Author(s):  
Pingping Dong ◽  
Jianxin Wang ◽  
Haodong Wang ◽  
Yi Pan
Keyword(s):  
Service Differentiation ◽  
Ieee 802.11E ◽  
Ieee 802.11E Edca

A delay model for IEEE 802.11e EDCA

2005 ◽  
Vol 9 (6) ◽  
pp. 508-510 ◽  
Author(s):  
A. Banchs ◽  
L. Vollero
Keyword(s):  
Ieee 802.11E ◽  
Delay Model ◽  
Ieee 802.11E Edca

scholarly journals Elastic QoS Scheduling with Step-by-Step Propagation in IEEE 802.11e Networks with Multimedia Traffic

2019 ◽  
Vol 2019 ◽  
pp. 1-23 ◽  
Author(s):  
Anna Lina Ruscelli ◽  
Gabriele Cecchetti ◽  
Piero Castoldi
Keyword(s):  
Physical Layer ◽  
Service Differentiation ◽  
Transmission Time ◽  
Ieee 802.11E ◽  
Service Needs ◽  
Virtual Training ◽  
Time Service ◽  
Depth Analysis ◽  
Feasibility Test ◽  
Service Data

The spreading diffusion of wireless devices and the crowded coexistence of multimedia applications greedy of bandwidth and with strict requirements stress the service provisioning offered by wireless technologies. WiFi is a reference for wireless connectivity and it requires a continuous evolution of its mechanism in order to follow increasingly demanding service needs. In particular, despite the evolution of physical layer, some critical contexts, such as industrial networks, telemedicine, telerehabilitation, and virtual training, require further refined improvements in order to ensure the respect of strict real-time service requirements. In this paper an in-depth analysis of Dynamic TXOP HCCA (DTH) MAC enhanced centralized scheduler is illustrated and it is further refined introducing a new improvement, DTH with threshold. DTH and DTH with threshold can be integrated with preexisting centralized schedulers in order to improve their performances, without any overprovisioning that can negatively impact on the admission control feasibility test. Indeed, without modifying the centralized scheduler policy, they combine together the concepts of reclaiming transmission time and statistical estimation of the traffic profile in order to provide, at each polling, an instantaneous transmission time tailored to the variable traffic requirements, increasing, when necessary, the service data rate. These mechanisms can coexist with advanced physical layer-based solutions, providing the required service differentiation. Experimental results and theoretical analysis, based on elastic scheduler theory, show that they are effective especially in the case of Variable Bit Rate traffic streams in terms of transmission queues length, packets loss, delay, and throughput.

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