Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit
IEEE/ACM Transactions on Networking (TON)
Goodput Analysis and Link Adaptation for IEEE 802.11a Wireless LANs
IEEE Transactions on Mobile Computing
High-performance architectures for IP-based multihop 802.11 networks
IEEE Wireless Communications
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Performance investigation of IEEE 802.11 MAC in multihop wireless networks
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Mobile Networks and Applications
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In the infrastructure configuration, the standard IEEE 802.11 wireless LAN employs an access point (AP) to forward all packets regardless of their destinations, resulting in significant system performance degradation in terms of throughput and packet delay when a significant portion of packets have intra-cell destinations. These intra-cell packets could be more efficiently delivered to the destinations directly in an ad hoc manner. In this paper, we propose methods to seamlessly integrate such ad hoc operations into the infrastructure mode. By inserting a 2@b delay in the frame exchange sequence, the proposed 2@b ad hoc awareness direct connection (2@b AHADC) scheme brings ad hoc awareness to the infrastructure setting and minimizes the number of packets forwarded by the AP. Furthermore, a direct cut-through forwarding (DCTF) scheme is introduced to minimize the intra-cell packet forwarding delay. We evaluate the performance of the proposed methods by theoretical analysis and simulations. Numerical results show that in systems with significant fraction of intra-cell packets, the DCTF and 2@b AHADC schemes effectively reduce packet delays and increase system throughput. The proposed methods extend the capability and performance of existing standards in a backward compatible manner, by introducing minor modifications that do not require explicit mode switching or extra modules.