Subcarrier and Power Allocation for OFDMA-Based Regenerative Multi-hop Links
Mesh network, with its ma ny advantages, is one of the most promising topologies in the future distributed wireless network. The system performance can be improved by optimally allocating the overall power and bandwidth to the transmitter and the relays. This paper focuses on the subcarrier and power allocation in orthogonal frequency division multiple access (OFDMA) based regenerative mesh network. Three sub-optimal allocation strategies are presented in this paper to maximize the end-to-end capacity in multi-hop link. The first one, Reference Strategy (RS), is a discrete version of the algorithm proposed in 1. Another strategy named Uniform Power Strategy (UPS)allocates uniform power to each hop while optimally assigns the number of subcarriers. In the last strategy, Uniform Ratio Strategy (URS), each hop is identical in terms of power-tosubcarrier ratio. Numerical simulation demonstrates that URS and RS perform better than UPS in asymmetric case, where the average channel gain of each hop is different. With the increase of subcarrier number, end-to-end capacity of URS becomes larger than that of RS. However, in symmetric case, the UPS outperforms URS and the RS at small subcarrier number.
OFDMA mesh network resource allocation
SHI Jing ZHANG Zhaoyang QIU Peiliang Yu Guanding
Dept.of Information Science and Electronic Engineering Zhejiang University Hangzhou, P.R.China
国际会议
武汉
英文
207-210
2005-09-23（万方平台首次上网日期，不代表论文的发表时间）