28 April 2004 Novel rate allocation scheme to minimize average transmission delay in CDMA uplink
Author Affiliations +
Proceedings Volume 5284, Wireless Communications and Networks; (2004) https://doi.org/10.1117/12.522996
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
Abstract
An optimum rate allocation scheme for code division multiple access (CDMA) uplink, which minimizes the average transmission delay of data users under the system resource constraint, is derived and evaluated in this paper. The average transmission delay minimization issue is formulated as a constrained optimization problem and solved using the Lagrange multiplier method. It is found that the proposed allocation rule achieves the minimum average transmission delay of data users compared to the other two conventional rate allocation schemes. Moreover, the proposed approach obtains much less transmission delay against the other two schemes especially when the traffic load is higher, which indicates that our scheme is more efficient in the high load systems. Numerical examples also show that the system parameters such as outage probability constraint and power control errors have great impact on the delay performance. Since our work is based on the imperfect power control model, it is more appropriate to the practical CDMA systems, especially for the delay-sensitive services.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xiaoming Bo, Xiaoming Bo, Zujue Chen, Zujue Chen, } "Novel rate allocation scheme to minimize average transmission delay in CDMA uplink", Proc. SPIE 5284, Wireless Communications and Networks, (28 April 2004); doi: 10.1117/12.522996; https://doi.org/10.1117/12.522996
PROCEEDINGS
8 PAGES


SHARE
Back to Top