HARQ


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HARQ

(Hybrid Automatic Repeat ReQuest) A technique that enables faster recovery from errors in cellular networks by storing corrupted packets in the receiving device rather than discarding them. Even if retransmitted packets have errors, a good packet can be derived from the combination of bad ones. See HSPA.
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Compared with existing schemes such as [18], the main difference or contribution of this paper lies that, by taking advantage of the mechanism of retransmissions in HARQ, the dynamic thresholds are designed to favorite higher modulation and coding rate, which corresponds to higher-rate transmission modes at the first several (re)transmissions, which results in higher average system spectrum efficiency.
2 Joint Coupling between MCS scheme and HARQ mechanism
Given that all simulations conduct throughput fraction and spectral efficiency measurement in fading environment and with a closed loop sending HARQ ACK/NACK feedback is enabled.
In our approach, HARQ type-I with RS (Reed-Solomon) code is chosen as FEC.
To obtain higher data rates and greater spectral efficiency, the fast power control and variable spreading factor of the DSCH are replaced in Release 5 by short packet size, multicode operation, and techniques such as AMC and HARQ on the HS-DSCH.
Communication protocols for disaster aid system Network WBAN or LTE Satellite Internet Layer Ad Hoc cellular Communication network network Physical ISM, MICS, FDD, TDD Electromagnetic Twisted UWB (OFDMA, wave Pair, MIMO, Fiber SC-FDMA) MAC CSMA, TDMA, HARQ CFDAMA, RRAA, CSMA-CD Slotted D-RRAA, MF-TDMA ALOHA, BTMA, MACAW, FPRP, or a combination of both Router OLSR, TBRPF, RLC, TLSR, MLSR, RIPng, (Control DSR, AODV, PDCP,RRC SGRP, DRP-BM, OSPFv3, protocols ABR, ZRP, SDRP, THRA, IS-ISv6, for LTE) SHARP, TDRP, T-ARP BGP4+ MP-DSP, ADMR Table 2.
BreezeMAX Macro Outdoor base station is a new carrier-class product that is compact in size and supports advanced mobility features such as handoffs, HARQ, Re-use 1 and 4x4 RF diversity.
Chang, "An algorithm for iterative detection and decoding MIMO-OFDM HARQ with antenna scheduling," KSII Trans.
formal simulator support for 3GPP LTE closed-loop "throughput" measurements using HARQ, based on LTE version 8.
Lau, "Combined cross-layer design and HARQ for multiuser systems with outdated channel state information at transmitter (CSIT) in slow fading channels," IEEE Transactions on Wireless Communication, vol.