Title :
A novel frame level orthogonal code hopping multiplexing scheme
Author :
Seo, Young Ik ; Sung, Dan Keun
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
A new frame level orthogonal code hopping multiplexing (FrOCHM) scheme is proposed to statistically multiplex bursty data user traffic in downlink. The FrOCHM scheme solves the channel inefficiency problem arising in conventional CDMA systems. Moreover, combining both a scheduling-based multiplexing scheme and our previously proposed orthogonal code hopping multiplexing (OCHM) scheme, the FrOCHM mitigates the complexity of the scheduling-based multiplexing scheme and does not need additional Eb/N0 required in the OCHM scheme. Simulation results show that the FrOCHM can support 251 mobile stations, while the scheduling-based multiplexing scheme supports 136 mobile stations when the user activity is 0.05 and the data rate is 64 kbps.
Keywords :
channel coding; code division multiple access; data communication; mobile radio; multiplexing; radio links; scheduling; telecommunication traffic; 64 Kbit/s; CDMA system; bursty data user traffic; frame level orthogonal code hopping multiplexing scheme; scheduling-based multiplexing scheme; Base stations; Decoding; Degradation; Delay; Downlink; Multiaccess communication; OFDM; Processor scheduling; Quality of service; Throughput;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494730
