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An Efficient Negative Acknowledgment Method for CDMA-Based Ranging in IEEE 802.16 OFDMA Systems
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- Authors
- Namsuk Lee, Yongseouk Choi, Sookjin Lee, Nam Kim
- Issue Date
- 2010-01
- Citation
- IEEE Communications Letters, v.14, no.1, pp.15-17
- ISSN
- 1089-7798
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- Ranging in IEEE 802.16 systems is used to synchronize an uplink or to request an uplink bandwidth. The base station sends a ranging response message as a positive acknowledgment of a successfully received code. However, the base station does not provide a negative acknowledgment; hence, a mobile station is unable to determine if its ranging code is unsuccessfully transmitted. This paper proposes a negative acknowledgment method based on a ranging slot indicator and the frame number of a ranging response message. The results of the performance analysis show that the proposed method can reduce the delay of a code retransmission. © 2010 IEEE.
- KSP Keywords
- IEEE 802.16(WIMAX), Mobile station(MS), OFDMA systems, Performance analysis, base station