Cooperative Online Caching in Small Cell Networks with Limited Cache Size and Unknown Content Popularity

2018 ◽  
Author(s):  
Chen-Tai Yen ◽  
Feng-Tsun Chien ◽  
Min-Kuan Chang
Keyword(s):  
Small Cell ◽  
Small Cell Networks ◽  
Cache Size ◽  
Content Popularity ◽  
Cell Networks

scholarly journals On the Performance of UAV-Aided Content Caching in Small-Cell Networks with Joint Transmission

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1040
Author(s):  
Menghan Wei ◽  
Youjia Chen ◽  
Ming Ding
Keyword(s):  
Transmission Rate ◽  
High Mobility ◽  
Limited Resource ◽  
Small Cell ◽  
Base Stations ◽  
Cell Content ◽  
Small Cell Networks ◽  
Content Caching ◽  
Cell Networks ◽  
Joint Transmission

Unmanned aerial vehicles (UAVs), featured by the high-mobility and high-quality propagation environment, have shown great potential in wireless communication applications. In this paper, a novel UAV-aided small-cell content caching network is proposed and analyzed, where joint transmission (JT) is considered in the dense small-cell networks and mobile UAVs are employed to shorten the serving distance. The system performance is evaluated in terms of the average cache hit probability and the ergodic transmission rate. From the analytical results, we find that (i) the proposed UAV-aided small-cell network shows superior caching performance and, even with a small density of UAVs the system’s cache hit probability, can be improved significantly; (ii) the content’s optimal caching probability to maximize the cache hit probability is proportional to the (K+1)-th root of its request probability, where K is the number of small-cell base stations that serve each user by JT; (iii) caching the most popular content in UAVs may lead to a low transmission rate due to the limited resource offered by the low-density UAVs. Simulation results are presented to validate the theoretical results and the performance gain achieved by the optimal caching strategy.

Reducing the energy consumption of small cell networks subject to QoE constraints

2014 ◽  
Author(s):  
Nikolaos Sapountzis ◽  
Stylianos Sarantidis ◽  
Thrasyvoulos Spyropoulos ◽  
Navid Nikaein ◽  
Umer Salim
Keyword(s):  
Energy Consumption ◽  
Small Cell ◽  
Small Cell Networks ◽  
Cell Networks
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