TY - JOUR
T1 - Joint optimization of throughput and packet drop rate for delay sensitive applications in TDD satellite network coded systems
AU - Esmaeilzadeh, Mohammad
AU - Aboutorab, Neda
AU - Sadeghi, Parastoo
PY - 2014/2
Y1 - 2014/2
N2 - In this paper, we consider the issue of throughput and packet drop rate (PDR) optimization as two performance metrics for delay sensitive applications in network coded time division duplex (TDD) satellite systems with large round trip times (RTTs). We adopt random linear network coding (RLNC) and our purpose is to obtain the optimum RLNC-based transmission strategy. We start with a single-user case and propose a systematic framework to investigate the advantage of using feedback by comparing feedback-free and feedback schemes. Showing analytically that the feedback-free scheme gives better performance for our system of interest, we extend it to multi-user broadcast case. To this end, we consider a number of different broadcast scenarios and optimize the system parameters such that the best overall performance is achieved. Furthermore, the complicated interplay of the mean throughputs and PDRs of different users with different packet erasure conditions is discussed. Finally, it is shown that the optimized feedback-free RLNC broadcast scheme works close enough to an idealistic RLNC scheme, where the complete and immediate knowledge about the reception status of all users is assumed to be available at the sender.
AB - In this paper, we consider the issue of throughput and packet drop rate (PDR) optimization as two performance metrics for delay sensitive applications in network coded time division duplex (TDD) satellite systems with large round trip times (RTTs). We adopt random linear network coding (RLNC) and our purpose is to obtain the optimum RLNC-based transmission strategy. We start with a single-user case and propose a systematic framework to investigate the advantage of using feedback by comparing feedback-free and feedback schemes. Showing analytically that the feedback-free scheme gives better performance for our system of interest, we extend it to multi-user broadcast case. To this end, we consider a number of different broadcast scenarios and optimize the system parameters such that the best overall performance is achieved. Furthermore, the complicated interplay of the mean throughputs and PDRs of different users with different packet erasure conditions is discussed. Finally, it is shown that the optimized feedback-free RLNC broadcast scheme works close enough to an idealistic RLNC scheme, where the complete and immediate knowledge about the reception status of all users is assumed to be available at the sender.
KW - Network coding
KW - delay sensitive applications
KW - satellite communications
KW - time division duplex channels
UR - http://www.scopus.com/inward/record.url?scp=84900650504&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2014.011014.130248
DO - 10.1109/TCOMM.2014.011014.130248
M3 - Article
SN - 1558-0857
VL - 62
SP - 676
EP - 690
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 2
M1 - 6725580
ER -