Joint uplink/downlink optimization for backhaul-limited mobile cloud computing with user scheduling

Document Type

Article

Publication Date

12-1-2017

Abstract

Mobile cloud computing enables the offloading of computationally heavy applications, such as for gaming, object recognition or video processing, from mobile users (MUs) to cloudlet or cloud servers, which are connected to wireless access points, either directly or through finite-capacity backhaul links. In this paper, the design of a mobile cloud computing system is investigated by proposing the joint optimization of computing and communication resources with the aim of minimizing the energy required for offloading across all MUs under latency constraints at the application layer. The proposed design accounts for multiantenna uplink and downlink interfering transmissions, with or without cooperation on the downlink, along with the allocation of backhaul and computational resources and user selection. The resulting design optimization problems are nonconvex, and stationary solutions are computed by means of successive convex approximation techniques. Numerical results illustrate the advantages in terms of energy-latency tradeoff of the joint optimization of computing and communication resources, as well as the impact of system parameters, such as backhaul capacity, and of the network architecture.

Identifier

85028383966 (Scopus)

Publication Title

IEEE Transactions on Signal and Information Processing Over Networks

External Full Text Location

https://doi.org/10.1109/TSIPN.2017.2668142

e-ISSN

2373776X

First Page

787

Last Page

802

Issue

4

Volume

3

Grant

1525629

Fund Ref

National Science Foundation

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