MAC Protocols for Wireless Mesh Networks with Multi-beam Antennas: A Survey

Multi-beam antenna technologies have provided lots of promising solutions to many current challenges faced in wireless mesh networks. The antenna can establish several beamformings simultaneously and initiate concurrent transmissions or receptions using multiple beams, thereby increasing the overall throughput of the network transmission. Multi-beam antenna has the ability to increase the spatial reuse, extend the transmission range, improve the transmission reliability, as well as save the power consumption. Traditional Medium Access Control (MAC) protocols for wireless network largely relied on the IEEE 802.11 Distributed Coordination Function(DCF) mechanism, however, IEEE 802.11 DCF cannot take the advantages of these unique capabilities provided by multi-beam antennas. This paper surveys the MAC protocols for wireless mesh networks with multi-beam antennas. The paper first discusses some basic information in designing multi-beam antenna system and MAC protocols, and then presents the main challenges for the MAC protocols in wireless mesh networks compared with the traditional MAC protocols. A qualitative comparison of the existing MAC protocols is provided to highlight their novel features, which provides a reference for designing the new MAC protocols. To provide some insights on future research, several open issues of MAC protocols are discussed for wireless mesh networks using multi-beam antennas.Comment: 22 pages, 6 figures, Future of Information and Communication Conference (FICC) 2019, https://doi.org/10.1007/978-3-030-12388-8_

VoIP capacity over multiple IEEE 802.11 WLANs.

Chan, An.Thesis (M.Phil.)--Chinese University of Hong Kong, 2007.Includes bibliographical references (leaves 80-84).Abstracts in Chinese and English.Chapter Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Motivations and Contributions --- p.1Chapter 1.2 --- Related Works --- p.3Chapter 1.3 --- Organization of the Thesis --- p.4Chapter Chapter 2 --- Background --- p.5Chapter 2.1 --- IEEE 802.11 --- p.5Chapter 2.1.1 --- Basic IEEE 802.11 Standards --- p.5Chapter 2.1.2 --- Types of Networks --- p.7Chapter 2.2 --- Voice over IP (VoIP) Codecs --- p.8Chapter 2.3 --- VoIP over WLAN --- p.9Chapter 2.3.1 --- System Architecture of VoIP over WLAN --- p.9Chapter 2.3.2 --- VoIP Capacity over an Isolated WLAN --- p.10Chapter Chapter 3 --- VoIP Capacity over Multiple WLANs --- p.12Chapter 3.1 --- Topology Settings and Assumptions --- p.12Chapter 3.2 --- Low VoIP Capacity Found in NS2 Simulations --- p.16Chapter 3.3 --- Applying Frequency Channel Assignment --- p.18Chapter Chapter 4 --- Clique Analysis and Call Admission Control --- p.21Chapter 4.1 --- Conflict Graph Model and Cliques --- p.21Chapter 4.2 --- Cliques in Multi-Cell WLANs --- p.22Chapter 4.3 --- Clique-Based Call Admission Control Algorithm --- p.24Chapter 4.3.1 --- Algorithm Description --- p.24Chapter 4.3.2 --- Algorithm Performance Evaluation --- p.27Chapter 4.3.3 --- Clique-Based Admission Control in Three-Frequency- Channel WLAN --- p.29Chapter Chapter 5 --- Time Division Multiple Access (TDMA) on IEEE 802.11MAC --- p.32Chapter 5.1 --- Coarse-Grained Time-Division Multiple Access (CTDMA) --- p.33Chapter 5.1.1 --- Basic Ideas of CTDMA --- p.33Chapter 5.1.2 --- Conflict Graph Modeling of CTDMA --- p.35Chapter 5.1.3 --- Parameter Values in CTDMA --- p.41Chapter 5.2 --- Possible Realization of TDMA on 802.11 Standards --- p.47Chapter Chapter 6 --- Coloring Problem in Wireless Networks: A Theoretical Treatment --- p.52Chapter 6.1 --- Coloring of One-Dimensional Linear Network --- p.53Chapter 6.1.1 --- Network with Same Link Length --- p.53Chapter 6.1.2 --- Network with Variable Link Length --- p.54Chapter 6.2 --- Coloring of Two-Dimensional Network --- p.63Chapter Chapter 7 --- Conclusion --- p.66Appendices --- p.69References --- p.8

MobiCom Poster Abstract: Capacity Improvement of Wireless Ad Hoc Networks with Directional Antennae

Network Capacity, which is limited by interference between simultaneous transmissions of neighboring links, is a fundamental performance metric for wireless ad hoc networks. Ref. [1