Title :
Nonrearrangeable compact assignment of orthogonal variable spreading factor 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
fDate :
6/23/1905 12:00:00 AM
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 nonrearrangeable compact assignment (NCA), is proposed for accommodating multi-rate traffic. NCA can offer maximal flexibility to the resulting assignable code set after each code assignment. As a result, it gives better blocking, throughput and fairness performance when compared to random assignment (RA) scheme
Keywords :
cellular radio; codes; radio access networks; telecommunication traffic; NCA; UTRA systems; assignable code set; blocking; fairness performance; flexibility index; multi-rate traffic; nonrearrangeable compact assignment; orthogonal variable-spreading-factor codes; random assignment scheme; single-code assignment scheme; spreading-factor codes; throughput; transmission rates; Computational complexity; Computer simulation; GSM; Mobile communication; Research and development; Telecommunication traffic; Throughput; Transceivers;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956911
