Multicode Multirate Compact Assignment of OVSF Codes for QoS Differentiated Terminals

Y. Yang, T.-S.P. Yum
2005 IEEE Transactions on Vehicular Technology  
Orthogonal variable spreading factor (OVSF) codes are used in both universal terrestrial radio access-frequency division duplex (UTRA-FDD) and time division duplex (UTRA-TDD) of the third-generation (3G) mobile communication systems. They can support multirate transmissions for mobile terminals with multicode transmission capabilities. In this paper, a new OVSF code assignment scheme, namely "multicode multirate compact assignment" (MMCA), is proposed and analyzed. The design of MMCA is based
more » ... of MMCA is based on the concept of "compact index" and takes into consideration mobile terminals with different multicode transmission capabilities and different quality of service (QoS) requirements. Priority differentiation between multirate realtime traffic and best-effort data traffic is also supported in MMCA. Analytical and simulation results show that MMCA is efficient and fair. Index Terms-Dynamic channel assignment (DCA), orthogonal variable spreading factor (OVSF) code, quality of service (QoS), universal terrestrial radio access (UTRA). , contains all the codes on the path from (k, m) to the Yang Yang (S'99-M'02) received the B. Eng. and M. Eng. degrees in radio engineering from Southeast University,
doi:10.1109/tvt.2005.858166 fatcat:k6trfhtybndshnjyxheuld262e