Computation rate maximization for IRS-enhanced dynamic spectrum access assisted MEC system

Tian, Kang; Chai, Haojun; Liu, Yameng; Liu, Boyang

doi:10.1016/j.phycom.2022.101697

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Sun [20] algorithm is further developed to solve the formulated training delay minimization problem. Kang [21] considered the integration of the IRS enhanced dynamic spectrum access (DSA) technology to a mobile edge computing(MEC) system, and studied the pertinent joint optimization of the phase shift coefficients of the IRS, the transmission powers, the central processing unit (CPU) frequencies, as well as the task offloading time allocations of the secondary users (SUs) to maximize the average computation bits of the SUs. Based on the flexibility of the IRS to adjust its beamforming (BF) vector in each transmission frame, Chen [22] proposed three different dynamic IRS beamforming (DIBF) schemes.…”

Section: Introductionmentioning

confidence: 99%

Blockchain enabled zero trust based authentication scheme for railway communication networks

et al. 2023

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With the introduction of emerging technologies such as cloud computing, the railway communication network has the characteristics of complex structure and blurred boundaries, which leads to a series of security threats including information leakage and malicious access. Specifically, the third-party cloud services are difficult to be supervised, and network traffic is untrustworthy. To ensure system security, we propose a zero-trust security model in this paper. Then, we introduce blockchain and Merkle tree to build a distributed identity storage scheme for guaranteeing reliable, confidential and efficient data updates, and improving authentication efficiency. Furthermore, the proxy was introduced for two-way authentication with cloud servers, so that internal and external threats could be counteracted. Moreover, reputation assessment mechanism has been adopted to reduce the possibility of nodes accessing malicious cloud services. Performance analysis demonstrated that the proposed security model is able to enhance the security, efficiency and stability of the system, and consequently can guarantee the safety and reliability of railway transportation.

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Section: Introductionmentioning

confidence: 99%