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

fYear

2012

fDate

10-15 June 2012

Firstpage

7077

Lastpage

7081

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2012 IEEE International Conference on

Conference_Location

Ottawa, ON

ISSN

1550-3607

Print_ISBN

978-1-4577-2052-9

Electronic_ISBN

1550-3607

Type

conf

DOI

10.1109/ICC.2012.6364729

Filename

6364729