QoS-aware Streaming With HCCA TXOP Negotiation in Overlapped Wi-Fi Networks
To avoid collisions in Wi-Fi networks, access points (APs) - acting as coordinators - got the ability to use centralized contention-free channel access, e.g. HCCA, which supports parameterized QoS. However, the growth of WLANs population raises a problem of coordination between APs. As a solution to this problem, IEEE 802.11aa introduces the HCCA TXOP Negotiation mechanism, which allows APs to agree in advance on periodic time intervals used by each AP for contentionfree channel access. The paper studies the efficiency of such a mechanism, focusing on developing a model, which allows selecting appropriate reservation parameters to minimize channel resource consumption while transmitting several flows with given QoS requirements.