NDLI: Ranging code collision probability in OFDMA based BWA network

Content Provider	IEEE Xplore Digital Library
Author	Anup Thapa Pudasaini, S. Seokjoo Shin
Copyright Year	2009
Description	Author affiliation: Dept. of Computer Engineering, Chosun University, Gwangju, Korea (Anup Thapa; Pudasaini, S.; Seokjoo Shin)
Abstract	For uplink time synchronization and power adjustment, ranging process has been suggested for OFDMA (Orthogonal Frequency Division Multiple Access) based BWA (Broadband Wireless Access) networks like IEEE 802.16. The CDMA (Code Division Multiple Access) type code transmission in contention based ranging channel has been provisioned to send the ranging request by an SS (Subscriber Station) to BS (Base Station). In contention based ranging channel, ranging code suffers with collision if same code is transmitted by two or more than two subscriber stations in a same frame. However, the number of available ranging codes, the applied contention resolution scheme, and the number of SSs in the network determine the collision probability of the transmitted request code in an any arbitrary time frame. Since the analysis of the collision probability of the transmitted ranging codes in the ranging channel is one of an important issues in OFDMA based BWA network when modeling or configuring the network parameters, in this paper, we have mathematically analyzed that issue. A analytical model along with simulation results has been presented to analyze the ranging code collision probability in terms of number of users, varying the number of ranging codes and contention window size.
Starting Page	2103
Ending Page	2107
File Size	580454
Page Count	5
File Format	PDF
ISBN	9788955191387
ISSN	17389445
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-15
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Electronics and Telecommunications Research Institute
Subject Keyword	Multiaccess communication OFDM Frequency conversion Analytical models Wireless LAN Frequency synchronization Base stations Mathematical model Fading Robustness
Content Type	Text
Resource Type	Article

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