361 research outputs found
Resource Allocation for Enhancing Offloading Security in NOMA-Enabled MEC Networks
This letter studies an uplink non-orthogonal multiple access (NOMA) enabled mobile-edge computing (MEC)
network. Specifically, we focus on the practical design of secure offloading without knowing the eavesdropper’s channel
state information. The aim is to maximize the minimum antieavesdropping ability (AEA) for uplink NOMA users subject to
the worst-case secrecy rate requirements and limited transmission
power budgets. The formulated problem is non-convex and
difficult to be solved directly. In order to tackle this issue, we
propose an efficient iterative algorithm by jointly designing the
secrecy rate, local computing bits and power allocation. The
local computing bits and the power allocation are derived in
closed form. Numerical results are provided to demonstrate the
efficiency of our proposed scheme in terms of AEA
Joint Computation and Communication Cooperation for Mobile Edge Computing
This paper proposes a novel joint computation and communication cooperation
approach in mobile edge computing (MEC) systems, which enables user cooperation
in both computation and communication for improving the MEC performance. In
particular, we consider a basic three-node MEC system that consists of a user
node, a helper node, and an access point (AP) node attached with an MEC server.
We focus on the user's latency-constrained computation over a finite block, and
develop a four-slot protocol for implementing the joint computation and
communication cooperation. Under this setup, we jointly optimize the
computation and communication resource allocation at both the user and the
helper, so as to minimize their total energy consumption subject to the user's
computation latency constraint. We provide the optimal solution to this
problem. Numerical results show that the proposed joint cooperation approach
significantly improves the computation capacity and the energy efficiency at
the user and helper nodes, as compared to other benchmark schemes without such
a joint design.Comment: 8 pages, 4 figure
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