Open AccessRetransmission scheme for contention‐based data transmission systems
Author(s) -
Li Lin,
Long Hang,
Zhao Long,
Yang Haojun,
Zheng Kan
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.0001
Subject(s) - retransmission , computer science , network packet , computer network , latency (audio) , real time computing , transmission (telecommunications) , data transmission , capture effect , overhead (engineering) , reliability (semiconductor) , low latency (capital markets) , collision , schedule , transmission delay , wireless , throughput , telecommunications , computer security , power (physics) , physics , quantum mechanics , operating system
In conventional schedule‐based wireless transmission system, frequent interactions between devices and access networks lead to significant signalling overhead, and thus limit the development of low‐latency applications. Contention‐based data transmission (CBDT) is widely used as a promising solution to address the above issues. In this study, the authors propose a detection‐based retransmission scheme for CBDT to further reduce the delay‐outage probability which cannot be avoided due to collision. In this scheme, each device simultaneously monitors the occupied resource blocks during data transmission. When a collision event is detected, the retransmission for this packet is determined without waiting for the acknowledgment message from the receiver. The reliability performance is significantly improved for low‐latency applications, since the possible retransmission times for each packet is increased within the limited transmission period. In addition, the impacts of imperfect detection on extra transmission load and packet loss are analysed in detail. The simulation and analytical results demonstrate that the detection‐based scheme significantly improves the reliability of CBDT.