DocumentCode :
684338
Title :
A utility-based OFDM resource allocation scheme for LEO small satellite system
Author :
Xiaolu Wu ; Yueyun Chen ; Liqiang Gao ; Chao Meng
Author_Institution :
School of Computer and Communication Engineering Beijing, China University of Science and Technology, China
fYear :
2013
fDate :
23-23 Nov. 2013
Firstpage :
68
Lastpage :
73
Abstract :
Low Earth Orbit (LEO) small satellite communication networks, operating at higher band, play a significant role to the worldwide information network. Satellite-earth wireless channel fading is the prime impairment factor for degrading the performance of the network. As a pervasive technology used in the fourth-generation (4G) system, OFDM sub-carrier allocation is one of the key issues for satellite network. In this paper, we set up a utility-based framework and maximize the total throughput, considering different quality of service (QoS) requirements of multi-services. Based on the experienced delay, the services queuing delay and delay deadline threshold, we propose a ULHA (Utility-Lagrange-Heuristic Algorithm) for solving the sub-carrier allocation. In the strategy, using the delay from the satellite to mobile terminal, the heuristic algorithm is suggested and simulated. Simulation results show that the sub-carrier allocation algorithms have balanced the system performance between efficiency and fairness. The QoS of real-time services has been well satisfied in the LEO small satellite communication networks.
Keywords :
LEO small satellite system; OFDM; channel allocation; channel model; utility function;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Cyberspace Technology (CCT 2013), International Conference on
Conference_Location :
Beijing, China
Electronic_ISBN :
978-1-84919-801-1
Type :
conf
DOI :
10.1049/cp.2013.2096
Filename :
6748564
Link To Document :
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