Loading...

Modeling and Analysis of D2D Data Offloading

Karami, Farzan | 2017

632 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50208 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Ashtiani, Farid; Mirmohseni, Mahtab
  7. Abstract:
  8. The increase in mobile data traffic adversely affects the quality of service experienced by mobile users. Moreover, the cost incurred by developing infrastructure exceeds its profit. Therefore, there is a trend toward finding cost effective schemes to cope with increase in mobile data traffic. One of the recent elegant solutions is mobile data offloading based on D2D communications. In this thesis, we propose a new offloading scheme using D2D communications for delay-tolerant services. In this regard, we assume a common file is demanded by a subset of users in different time instances and we accumulate demands to serve them in a scheme where devices are divided into non-overlapping coalition based on their deadlines. We find a strategy for delivering the content in each coalition using the in-band full-duplex D2D communication and multicasting. To this end, we formulate the problem as coalition structure generation model. Since the channel gains change due to the small-scale fading, the established links are not reliable. Therefore, we propose a scheme to guarantee a specific error probability for data reception for all nodes in a coalition. To evaluate the methods, we define our metric as the time-integrated consumed bandwidth. We define offloading efficiency as the improvement percentage in that metric using D2D communications with respect to multicasting only. The results show that our scheme can achieve about 20 percent offloading efficiency when the time and frequency resources are scarce
  9. Keywords:
  10. Dead Line ; Multicasting Comunications ; Device to Device Communications ; Cellular Network ; Data Offloading ; Small Scale Fading ; Full Duplex Communication

 Digital Object List

 Bookmark

No TOC