TY - GEN
T1 - Dynamic pre-allocation HARQ (DP-HARQ) in IEEE 802.16j mobile multihop relay (MMR)
AU - Cheng, Kai Wen
AU - Chen, Jyh-Cheng
PY - 2009
Y1 - 2009
N2 - IEEE 802.16 is defining standards for Mobile Multihop Relay (MMR). The major purpose of MMR is to efficiently extend the coverage of a BS and to enhance the system throughput. Relay Station (RS) has been introduced to fulfill this goal. However, packets in MMR would have a large probability of failure transmission because not all links over the multihop path are in good channel condition. Therefore, Hybrid Automatic Repeat reQuest (HARQ) has been designed to increase the reliability in multihop transmission. However, the retransmission mechanism proposed in 802.16j is not efficient. It will result in high packet delay. In this paper, we propose Dynamic Pre-allocation HARQ (DP-HARQ) which pre-allocates bandwidth for HARQ. Therefore, the packet delay is reduced significantly. The pre-allocated bandwidth is dynamically adjusted so the channel utilization will not be degraded much. We also propose mathematical models to analyze the proposed DP-HARQ. The analysis is validated by extensive simulations. Results show that the proposed DP-HARQ can reduce packet delay and jitter significantly.
AB - IEEE 802.16 is defining standards for Mobile Multihop Relay (MMR). The major purpose of MMR is to efficiently extend the coverage of a BS and to enhance the system throughput. Relay Station (RS) has been introduced to fulfill this goal. However, packets in MMR would have a large probability of failure transmission because not all links over the multihop path are in good channel condition. Therefore, Hybrid Automatic Repeat reQuest (HARQ) has been designed to increase the reliability in multihop transmission. However, the retransmission mechanism proposed in 802.16j is not efficient. It will result in high packet delay. In this paper, we propose Dynamic Pre-allocation HARQ (DP-HARQ) which pre-allocates bandwidth for HARQ. Therefore, the packet delay is reduced significantly. The pre-allocated bandwidth is dynamically adjusted so the channel utilization will not be degraded much. We also propose mathematical models to analyze the proposed DP-HARQ. The analysis is validated by extensive simulations. Results show that the proposed DP-HARQ can reduce packet delay and jitter significantly.
UR - http://www.scopus.com/inward/record.url?scp=70449596142&partnerID=8YFLogxK
U2 - 10.1109/ICC.2009.5198958
DO - 10.1109/ICC.2009.5198958
M3 - Conference contribution
AN - SCOPUS:70449596142
SN - 9781424434350
T3 - IEEE International Conference on Communications
BT - Proceedings - 2009 IEEE International Conference on Communications, ICC 2009
T2 - 2009 IEEE International Conference on Communications, ICC 2009
Y2 - 14 June 2009 through 18 June 2009
ER -