TY - JOUR
T1 - Statistical Delay Tradeoffs in Buffer-Aided Two-Hop Wireless Communication Systems
AU - Qiao, Del
AU - Gursoy, M. Cenk
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grants (61571191, 61572192, 61671205) and the Shanghai Sailing Program (16YF1402600).
Publisher Copyright:
© 2016 IEEE.
PY - 2016/11
Y1 - 2016/11
N2 - This paper analyzes the impact of statistical delay constraints on the achievable rate of a two-hop wireless communication link in which the communication between a source and a destination is accomplished via a buffer-aided relay node. It is assumed that there is no direct link between the source and the destination, and the buffer-aided relay forwards the information to the destination by employing the decode-and-forward scheme. Given statistical delay constraints specified via maximum delay and delay violation probability, the tradeoff between the statistical delay constraints imposed on any two concatenated queues is identified. With this characterization, the maximum constant arrival rates that can be supported by this two-hop link are obtained by determining the effective capacity of such links as a function of the statistical delay constraints, signal-to-noise ratios at the source and relay, and the fading distributions of the links. It is shown that asymmetric statistical delay constraints at the buffers of the source and relay node can improve the achievable rate. Overall, the impact of the statistical delay tradeoff on the achievable throughput is provided.
AB - This paper analyzes the impact of statistical delay constraints on the achievable rate of a two-hop wireless communication link in which the communication between a source and a destination is accomplished via a buffer-aided relay node. It is assumed that there is no direct link between the source and the destination, and the buffer-aided relay forwards the information to the destination by employing the decode-and-forward scheme. Given statistical delay constraints specified via maximum delay and delay violation probability, the tradeoff between the statistical delay constraints imposed on any two concatenated queues is identified. With this characterization, the maximum constant arrival rates that can be supported by this two-hop link are obtained by determining the effective capacity of such links as a function of the statistical delay constraints, signal-to-noise ratios at the source and relay, and the fading distributions of the links. It is shown that asymmetric statistical delay constraints at the buffers of the source and relay node can improve the achievable rate. Overall, the impact of the statistical delay tradeoff on the achievable throughput is provided.
KW - Two-hop wireless links
KW - delay violation probability
KW - effective capacity
KW - fading channels
KW - full-duplex relaying
KW - quality of service (QoS) constraints
KW - statistical delay constraints
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U2 - 10.1109/TCOMM.2016.2607746
DO - 10.1109/TCOMM.2016.2607746
M3 - Article
AN - SCOPUS:85027417917
SN - 0090-6778
VL - 64
SP - 4563
EP - 4577
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 11
ER -