MECassisted Immersive Services: Orchestration Framework and Protocol Immersive media applications demand both a huge amount of data processing and low latency. The former requirement can be fulfilled by offloading user equipment (UE) tasks to a baseband unit (BBU) pool (or data center). As for the low latency, it can be achieved with Mobile Edge Computing (MEC), which allows offloading the tasks close to the UEs. In this paper, we take advantage of the cooperation between conventional BBUs and MEC to handle the UE tasks. Specifically, we propose an orchestration framework and a protocol to enable seamless immersive media applications. Our extensive simulations show that our solution can significantly reduce the number of failed tasks.

LatencyMinimized and EnergyEfficient Online Task Offloading for Mobile Edge Computing with Stochastic Heterogeneous Tasks Mobile edge computing (MEC) is a promising paradigm to meet the low latency requirement of applications like virtualaugmented reality, which moves computation workloads from remote cloud to network edge. Task offloading is a crucial problem in a MEC system, which significantly concerns with the achieved latency of tasks and the energy consumption on edge nodes. Although many efforts have been paid on the problem, most of them ignore the hierarchical architecture of MEC and the heterogeneity of tasks generated by different applications. In this paper, we consider a threelayer MEC system with tasks of various types stochastically arrive in real time, in which each task can be executed on mobile smart devices, offloaded to the edge server, or offloaded to the remote cloud. The task offloading problem in such a MEC system with the objective to minimize the averaged latency over time is NPhard. To solve it, we employ Lyapunov optimization and duality theory to reformulate the problem and decompose it into a set of subproblems. Each subproblem can be distributedly solved by a mobile device or the edge server individually. Extensive simulations are also performed to verify the feasibility and superiority of our approach.