Distribution of uplink signal to interference ratio in WCDMA random access channel (RACH)

The random access channel (RACH) is defined by 3rd generation partnership project (3GPP) as an uplink channel that is used for random-access transmission and short data bursts transportation from the user equipment (UE) to the network side in the absence of a dedicated traffic channel. The random-access transmission is based on a slotted Aloha approach with fast acquisition indication, carried by the acquisition indicator channel (AICH). In this paper, the RACH performance indicators such as delay and access success ratio are obtained for different traffic loads, in a single omni cell under shadowing and fast-fading conditions. We also propose an approximation for preamble signal to interference ratio (SIR) measured at base station point, in terms of mean level and standard deviation.

[1]  Amitava Ghosh,et al.  Simulated performance of W-CDMA random access channel , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).

[2]  R. Weber,et al.  Random access scheme for the ETSI/UTRA WCDMA , 1999, 1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363).

[3]  G. Frank,et al.  Link level performance results for a WCDMA random access scheme with preamble power ramping and fast acquisition indication , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[4]  I. N. Vukovic,et al.  Performance analysis of the random access channel (RACH) in WCDMA , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).

[5]  Che-Li Lin.  Investigation of 3rd generation mobile communication RACH transmission , 2000, Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152).

[6]  Robert Karlsson,et al.  Throughput of the WCDMA Random Access Channel , 2000 .