Linear Multi-Hop Wireless Network Design with Directional Antenna

Zihao Xiang, Jiachen Sun, Ning Ge, Jianhua Lu

Abstract: Directional antennas can synergize with suitable network structure to complement each other in multi-hop wireless networks. This work addresses the combination of directional transmission and network structure to improve the capacity. Firstly, Z-chain structure considering the antenna radiation pattern is proposed, which is consistent with the best chain structure obtained by exhaustive search. Secondly, theoretical analysis indicates that spectral efficiency $\eta_{S}$ behaves as a sigmoid function of node density $\rho$, with its asymptotic value increasing as $\Theta\left[\log \left(G_{r} \sin ^{2} \theta\right)\right]\left(\theta \leq \theta^{*}\right)$ for large values of $G_{r}$, where $G_{r}$ denotes the relative antenna gain, $\theta^{*}$ is a function of the antenna beam width and $2 \theta$ is the $\mathbf{Z}$-chain link angle. Thirdly, energy efficiency and consumption is assessed from a traffic load perspective. The findings reveal that the Z-chain network can accommodate higher data traffic compared to conventional frequency reuse method and straight structure. Experiments conducted using OMNeT++ validate above conclusions.

External IDs:dblp:conf/icc/XiangSGL25