Title :
Analysis of power ramping schemes for UTRA-FDD random access channel
Author :
Yang Yang ; Tak-Shing
Author_Institution :
Sch. of Eng. & Design, Brunel Univ., Uxbridge, UK
fDate :
29 Nov.-3 Dec. 2004
Abstract :
The random access channel (RACH) in a universal terrestrial radio access frequency division duplex (UTRA-FDD) system is a contention-based channel mainly used to carry control information from mobile stations to base stations. The transmission of a random access request contains two steps, preamble transmission and message transmission. In preamble transmission, a power ramping technique is used to favor the delayed preambles by stepping up the transmission power after each unsuccessful access. In doing so, the success of transmitting a long-delayed preamble is increased due to the power capture effect. We analyze the blocking and throughput performance of preamble transmission under three power ramping schemes with fixed, linear and geometric step sizes. Also, we compare the interference caused by different power ramping schemes.
Keywords :
3G mobile communication; frequency division multiplexing; mobile radio; radio access networks; 3G wireless communication; RACH; UTRA-FDD random access channel; base stations; contention-based channel; frequency division duplex; message transmission; mobile stations; power ramping schemes; preamble transmission; random access request; third-generation wireless communication; universal terrestrial radio access; AWGN; Base stations; Control systems; Delay; Design engineering; Frequency conversion; Performance analysis; Power engineering and energy; Radio control; Throughput;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1378961
