Journal
IEEE COMMUNICATIONS LETTERS
Volume 20, Issue 1, Pages 145-148Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2015.2499193
Keywords
Caching; RAN; D2D; latency; QoE; resource allocation; wireless networks
Categories
Funding
- Ministry of Science and Technology [MOST 104-2221-E-002-082]
- Mediatek Inc. [MOST 103-2622-E-002-034]
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The rapid growth of Internet contents from wireless data networks, especially social media, results in unprecedented traffic volume, invoking a challenge to the load of cellular infrastructure. Moreover, instead of traditional quality of service (QoS), the demands of quality of experience (QoE) become a more practical norm, which could barely be improved under present resource allocation on radio spectrum. With this in mind, we more generally consider resource allocation by exploiting caching in radio access networks (RANs), and show that caching, as a sort of storage, could be viewed as a substitution of the communication spectrum. Thus, we propose a collaborative strategy to implement caching in infrastructure and in mobile devices simultaneously, which in general turns out to be device-to-device (D2D) communication. This new design paradigm enables great reduction of latency for requesting Internet contents and can be implemented via slight amendments to present cellular systems.
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