TY - JOUR
T1 - Analysis of cooperative TDMA in Rayleigh fading channels
AU - Hu, Nansai
AU - Yao, Yu Dong
AU - Yang, Zhuo
PY - 2013
Y1 - 2013
N2 - The time-division-multiple-access-based (TDMA) protocol has been widely utilized as a reliable media access control (MAC) mechanism. By allocating each user a dedicated time slot, a given TDMA user transmits its packets in its exclusively assigned time slots, whereas other users are in idle mode (not transmitting). However, in this paper, a cooperative TDMA (C-TDMA) method is investigated, which enables cooperative transmissions among multiple TDMA users to improve the probability of success of packet transmissions. Specifically, a TDMA user not only transmits packets in its assigned slots but monitors/overhears other users' packets in other time slots as well. It will then be able to assist the other users, if needed, to retransmit their failed packets through cooperative diversity. For performance evaluations, expressions of three metrics, i.e., network throughput, packet-dropping rate, and average packet delay, are derived, considering a Rayleigh fading channel. Both theoretical and simulation results are presented to demonstrate that the throughput, dropping rate, and delay performance are all improved significantly with the use of C-TDMA.
AB - The time-division-multiple-access-based (TDMA) protocol has been widely utilized as a reliable media access control (MAC) mechanism. By allocating each user a dedicated time slot, a given TDMA user transmits its packets in its exclusively assigned time slots, whereas other users are in idle mode (not transmitting). However, in this paper, a cooperative TDMA (C-TDMA) method is investigated, which enables cooperative transmissions among multiple TDMA users to improve the probability of success of packet transmissions. Specifically, a TDMA user not only transmits packets in its assigned slots but monitors/overhears other users' packets in other time slots as well. It will then be able to assist the other users, if needed, to retransmit their failed packets through cooperative diversity. For performance evaluations, expressions of three metrics, i.e., network throughput, packet-dropping rate, and average packet delay, are derived, considering a Rayleigh fading channel. Both theoretical and simulation results are presented to demonstrate that the throughput, dropping rate, and delay performance are all improved significantly with the use of C-TDMA.
KW - Cooperative time-division multiple access (C-TDMA)
KW - Media access control (MAC)
KW - Packet delay
KW - Packetd-ropping rate
KW - Throughput
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U2 - 10.1109/TVT.2012.2229307
DO - 10.1109/TVT.2012.2229307
M3 - Article
AN - SCOPUS:84885094618
SN - 0018-9545
VL - 62
SP - 1158
EP - 1168
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 3
ER -