Title :
Type-II hybrid ARQ protocol and its applications in slotted Aloha DS-CDMA
Author :
Wenhua, Jiao ; Qinglin, Liang
Author_Institution :
Dept. of Electron., Beijing Univ., China
Abstract :
In spread spectrum communication systems where the channel state temporarily changes, it is preferable to change error-correcting capability in the hybrid ARQ scheme according to the channel state. The type-II hybrid ARQ (ARQ-II) protocol in the slotted CDMA network is analyzed. The performance of ARQ-II in slotted DS-CDMA is obtained using a simplified Gaussian approximation. Comparisons of type-I hybrid ARQ (ARQ-I) and ARQ-II in slotted Aloha DS-CDMA (SSA) are performed and results are given. It is shown that ARQ-II can be regarded as a multirate strategy that performs an information rate adaptation at the DLC (data link control) layer
Keywords :
Gaussian distribution; automatic repeat request; code division multiple access; error correction codes; spread spectrum communication; telecommunication control; ARQ-II; DLC layer; channel state; data link control; error-correcting capability; information rate adaptation; multirate strategy; performance; protocol; simplified Gaussian approximation; slotted Aloha DS-CDMA; spread spectrum communication system; type-II hybrid ARQ; Automatic repeat request; Block codes; Decoding; Error correction; Error correction codes; Feedback; Multiaccess communication; Multiple access interference; Protocols; Redundancy;
Conference_Titel :
Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-6394-9
DOI :
10.1109/ICCT.2000.889336
