IEEE 802.11e: The Problem of the Virtual Collision Management Within EDCA
Mohamad El Masri · 2006
IEEE 802.11e is the draft of amendments introducing QoS (quality of service) to the IEEE 802.11 standard. 802.11e supports HCF (hybrid control access) combining two access modes: EDCA (enhanced distributed channel access) and HCCA (HCF controlled channel access). EDCA is a distributed channel access function enabling prioritization. In this paper we discuss problems inherent to collision management within EDCA. The paper organizes as follows : the first part present the enhanced distributed channel access. Then we expose the issue of collision management. In the third part we detail our proposal for a modification of the EDCA's collision management.