Abstract
To ease the contradiction between the explosive growth of mobile data traffic and the capacity-limited backhaul networks, content caching is considered in a software-defined radio access network (SD-RAN) in this paper. Equipped with low-cost storage units, popular contents that are frequently requested by users can be cached at both the centralized macro-cell base station (MBS) at which the main control logics are installed, and the distributed small-cell base stations (SBSs) that are mainly responsible for data transmissions. With an objective of minimizing the average content provisioning cost of SD-RAN, a storage allocation is formulated between the MBS and SBSs subjected to a sum storage constraint. Firstly, a non-cooperative caching strategy is proposed, where the MBS and SBSs cache popular contents independently. In order to better utilize the available storage for achieving more efficient caching, a cross-layer cooperative caching strategy is then proposed by leveraging the cooperation and coordination between the MBS and SBSs. Results demonstrate that the average content provisioning cost of SD-RAN can be significantly reduced by using the analytically obtained optimal storage allocation factor, and the proposed cross-layer cooperative caching always outperforms the non-cooperative caching.
Original language | English |
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Title of host publication | 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017 |
Publisher | IEEE Institute of Electrical and Electronic Engineers |
Pages | 1-6 |
Number of pages | 6 |
ISBN (Electronic) | 978-1-5386-4502-4 |
ISBN (Print) | 978-1-5386-4503-1 |
DOIs | |
Publication status | Published - 2 Apr 2018 |
MoE publication type | A4 Article in a conference publication |
Event | 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017 - Qingdao, China Duration: 22 Oct 2017 → 24 Oct 2017 |
Conference
Conference | 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017 |
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Country | China |
City | Qingdao |
Period | 22/10/17 → 24/10/17 |
Keywords
- content provisioning cost
- control-data separation
- cooperative caching
- Software-defined radio access networks