Title :
Rearrangeable compact assignment of OVSF codes for multi-rate traffic
Author :
Yang, Yang ; Yum, Tak-Shing P.
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
In UTRA systems, orthogonal variable-spreading-factor (OVSF) codes are used to support different transmission rates for different users. In this paper, we first define an index for measuring the flexibility of an assignable code set. Based on this flexibility index, a single-code assignment scheme, namely rearrangeable compact assignment (RCA), is proposed for accommodating multi-rate traffic. RCA can offer maximal flexibility to the resulting assignable code set after each code assignment. Analytical and simulation results show that RCA is efficient, stable and fair.
Keywords :
3G mobile communication; codes; telecommunication traffic; OVSF codes; UTRA systems; code set; code tree; flexibility index; multi-rate traffic; orthogonal variable spreading-factor codes; rearrangeable compact assignment; simulation results; single-code assignment scheme; traffic channel; transmission rates; Analytical models; Bandwidth; Computational efficiency; Frequency division multiaccess; Time division multiple access; Traffic control; Transceivers; Zirconium;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188193
