標題: Iterative Contending-user Estimation Method for OFDMA Wireless Networks with Bursty Arrivals
作者: Cheng, Ray-Guang
Wei, Chia-Hung
Tsao, Shiao-Li
資訊工程學系
Department of Computer Science
關鍵字: multichannel slotted ALOHA;random access;transient behavior
公開日期: 1-Jan-2013
摘要: Random access channels (RACHs) in cellular networks are normally designed for Poisson-distributed arrivals with a constant rate. Unexpected bursty arrivals may result in severely collisions in RACHs and thus, degrade users\' service qualities. This paper presents an analytical model to investigate the transient behavior of the RACHs with bursty arrivals generated in a specific time interval in OFDMA wireless networks. The proposed model considers the effect of new arrivals and the real-world implementation constraints of the OFDMA random access procedure such as periodic access characteristic, uniform random backoff policy, and power-ramping effect. The average number of contending and success mobile stations (MSs) in each random-access slot are then derived using the proposed model. The accuracy of the proposed model was verified through computer simulations and the results show the accuracy of the analysis.
URI: http://hdl.handle.net/11536/125082
ISBN: 978-1-4799-3755-4
ISSN: 1530-1346
期刊: 2013 IEEE SYMPOSIUM ON COMPUTERS AND COMMUNICATIONS (ISCC)
Appears in Collections:Conferences Paper