TY - GEN
T1 - Content pushing based on physical layer multicasting and request delay information
AU - Lu, Yawei
AU - Chen, Wei
AU - Poor, H. Vincent
N1 - Funding Information:
This research was supported in part by the US National Science Foundation under Grants CCF-1420575 and CNS-1456793, the National 973 Program of China under Project No.2013CB336600, and the National Science Foundation of China under Grant Nos. 61322111 and 61671269.
Publisher Copyright:
© 2016 IEEE.
PY - 2016
Y1 - 2016
N2 - For content-centric wireless networks, pushing and proactive caching hold the promise of greatly improving system throughput in the future. However, the throughput gains obtained from these techniques are limited by the energy of the base station and the buffer size of the receivers. To make full use of this energy and these buffers, this paper presents a Joint Pushing and Caching (JPC) method for physical layer multicasting systems, where the request delay information (RDI) is exploited in noncausal, statistical, and causal form. In JPC, the content items pushed by the base station and removed from the buffers of receivers in each timeslot are jointly determined. With noncausal or statistical RDI, an offline policy is presented by formulating and solving an optimization problem in order to maximize the effective throughput. With causal RDI, an online policy is presented to further enhance the effective throughput with little signalling overhead. Causal feedback of RDI is found to bring a substantial throughput gain.
AB - For content-centric wireless networks, pushing and proactive caching hold the promise of greatly improving system throughput in the future. However, the throughput gains obtained from these techniques are limited by the energy of the base station and the buffer size of the receivers. To make full use of this energy and these buffers, this paper presents a Joint Pushing and Caching (JPC) method for physical layer multicasting systems, where the request delay information (RDI) is exploited in noncausal, statistical, and causal form. In JPC, the content items pushed by the base station and removed from the buffers of receivers in each timeslot are jointly determined. With noncausal or statistical RDI, an offline policy is presented by formulating and solving an optimization problem in order to maximize the effective throughput. With causal RDI, an online policy is presented to further enhance the effective throughput with little signalling overhead. Causal feedback of RDI is found to bring a substantial throughput gain.
UR - http://www.scopus.com/inward/record.url?scp=85015359556&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2016.7841692
DO - 10.1109/GLOCOM.2016.7841692
M3 - Conference contribution
AN - SCOPUS:85015359556
T3 - 2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings
BT - 2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 59th IEEE Global Communications Conference, GLOBECOM 2016
Y2 - 4 December 2016 through 8 December 2016
ER -