Probability and statistics with reliability, queuing and computer science applications
Probability and statistics with reliability, queuing and computer science applications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
IEEE Wireless Communications
SIP-based vertical handoff between WWANs and WLANs
IEEE Wireless Communications
Analysis of power ramping schemes for UTRA-FDD random access channel
IEEE Transactions on Wireless Communications
Analysis of SIP-based mobility management in 4G wireless networks
Computer Communications
Capacity of Slotted ALOHA in Rayleigh-Fading Channels
IEEE Journal on Selected Areas in Communications
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We present an analysis of delay encountered in successfully accessing the Random Access Channel (RACH) of Universal Mobile Telecommunication System (UMTS) Radio Interface by User Equipments (UE) that want to initiate data transfer. The process of random channel access is described and the MS state modeled as a DTMC in order to derive the delay. We evaluate the variation of the channel access delay with the preamble power, preamble detection threshold, maximum attempts, inter-attempt time interval, number of mobile users, number of slots, persistence level, rate of incoming data and rate of retransmissions. We also derive the capture probability of preambles sent in the same slot by multiple UEs in the presence of Rayleigh fading.