DocumentCode :
267031
Title :
To Offload or to Wait: An Opportunistic Offloading Algorithm for Parallel Tasks in a Mobile Cloud
Author :
Tram Truong-Huu ; Chen-Khong Tham ; Niyato, Dusit
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
fYear :
2014
fDate :
15-18 Dec. 2014
Firstpage :
182
Lastpage :
189
Abstract :
The significant development of mobile cloud computing allows a mobile user to access resources of the nearby mobile devices, i.e., Cloudlets, for processing tasks by using the offloading mechanism. However, due to the mobility of the user and cloudlets, the connection between the user´s device and cloudlets may be interrupted since cloudlets move out of transmission range of the user´s device. Consequently, the task transmission may fail, forcing the user to re-offload the task to another cloudlet or process on the local device. In this paper, we propose a dynamic opportunistic offloading algorithm which allows the user to make the decision of offloading or deferring the processing of each task in a set of parallel tasks. We formulate and solve a Markov Decision Process (MDP) model for the mobile user to obtain an optimal offloading policy while minimizing the offloading and processing cost. We extend the MDP model to a constrained MDP to solve the offloading problem when the user has a processing deadline. Numerical studies and simulations were carried out to evaluate the performance of the proposed model. The results show that the proposed model outperforms conventional baseline schemes.
Keywords :
Markov processes; cloud computing; decision making; mobile computing; parallel processing; MDP model; Markov decision process model; cloudlets; decision making; dynamic opportunistic offloading algorithm; mobile cloud computing; mobile devices; mobile user; offloading mechanism; opportunistic offloading algorithm; optimal offloading policy; parallel tasks; task transmission; Availability; Computational modeling; Heuristic algorithms; Markov processes; Mobile communication; Mobile handsets; Numerical models; Cloud computing; Markov Decision Process; ad-hoc network; mobile computing; offloading;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Cloud Computing Technology and Science (CloudCom), 2014 IEEE 6th International Conference on
Conference_Location :
Singapore
Type :
conf
DOI :
10.1109/CloudCom.2014.33
Filename :
7037665
Link To Document :
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