Cart (Loading....) | Create Account
Close category search window
 

Common packet channel (CPCH): the optimum wireless Internet mechanism in W-CDMA

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)

Wideband packet CDMA was introduced to the 3GPP process in February of 1999. GBT championed the specification of common packet channel (CPCH), which was the main distinguishing feature of WP-CDMA, the RTT submitted to the ITU. In this paper, the CPCH mechanism in W-CDMA is compared with the dedicated channel (DCH) and the random access channel (RACH) mechanisms for bursty packet data transfer. CPCH is the most efficient wireless Internet mechanism in W-CDMA. It operates at all rates including 384 kbps and could also support 2.048 Mbps, if the entire cell were dedicated to packet data services. The CPCH is more spectrum efficient as compared to the DCH mode of operation in the uplink and downlink directions. We show that the CPCH offers 25% and 11.2% more capacity in the uplink and downlink direction, respectively. We specifically compared the CPCH with the stop and resumption control of the DCH. Other proposed methods, such as the gating method for DCH, are even less efficient from a spectrum efficiency perspective than the stop and resumption control. In the gating method for DCH, the MS generates even more interference than the stop and resumption control. The CPCH requires 5-10 times less channel cards in the base node, which leads to a significant reduction in base node complexity. This has been shown in a comparative study of circuit mode versus packet mode of operation. The use of the CPCH leads to a decrease of 24% in power consumption in the MS as compared to DCH. In consequence, this will increase the talk time by 24%. The CPCH operates in closed loop power control as compared to the random access channel, which operates in open loop power control, this leads to a 2-4 capacity ratio of CPCH over RACH

Published in:

3G Mobile Communication Technologies, 2000. First International Conference on (Conf. Publ. No. 471)

Date of Conference:

2000

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.