Title :
Base-station assisted device-to-device communications for high-throughput wireless video networks
Author :
Golrezaei, Negin ; Molisch, Andreas F. ; Dimakis, Alexandros G.
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
We propose a new scheme for increasing the throughput of video files in cellular communications systems. This scheme exploits (i) the redundancy of user requests as well as (ii) the considerable storage capacity of smartphones and tablets. Users cache popular video files and - after receiving requests from other users - serve these requests via device-to-device localized transmissions. We investigate what is the optimal collaboration distance, trading off frequency reuse with the probability of finding a requested file within the collaboration distance. We show that an improvement of spectral efficiency of one to two orders of magnitude is possible, even if there is not very high redundancy in video requests.
Keywords :
cache storage; cellular radio; frequency allocation; mobile computing; probability; radio networks; redundancy; smart phones; spectral analysis; telecommunication network reliability; video communication; base station; cache storage; cellular communications system; device-to-device localized transmission; device-todevice communication; frequency reuse; optimal collaboration distance; probability; redundancy; smart phone capacity; spectral efficiency; tablet capacity; throughput wireless video network; video file; Base stations; Collaboration; Computer architecture; Microprocessors; Redundancy; Smart phones; Wireless communication;
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
DOI :
10.1109/ICC.2012.6364729
