期刊
IEEE TRANSACTIONS ON BROADCASTING
卷 66, 期 1, 页码 66-77出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBC.2019.2902818
关键词
Wireless fidelity; Wireless communication; Overlay networks; Heuristic algorithms; Broadcasting; Cellular networks; Relays; Converged overlay networks; distributed caching; offloading; popular services pushing and caching
资金
- National Natural Science Foundation of China [61671295, 61471236, 61420106008]
- Shanghai Key Laboratory of Digital Media Processing and Transmission
- Shanghai Pujiang Program [16PJD029]
- 111 Project [B07022]
- National Key Laboratory of Science and Technology on Communications [KX172600030]
With the proliferation of portable devices, the exponential growth of the global mobile traffic brings great challenges to the traditional communication networks and the traditional wireless communication technologies. In this context, converged networks and cache-based data offloading have drawn more and more attention based on the strong correlation of services. This paper proposes a novel popular services pushing and caching scheme by using converged overlay networks. The most popular services are pushed by terrestrial broadcasting networks. And they are cached in ${n}$ router-nodes with limited cache sizes. Each router-node only interconnects with its neighbor nodes. Users are served through the router's WiFi link. If the services requested are cached in the routers, the user can be immediately responded; otherwise, the requests can be responded through the link from cellular stations to the router. In the proposed scheme, the cache size of the router, the maximum number of requests each router can serve, and the whole-time delay are limited. Three node-selecting and dynamic programming algorithms are adopted to maximize the equivalent throughput. Analytical and numerical results demonstrate that the proposed scheme is very effective.
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