Abstract
Effective resource allocation has always been one of the serious challenges in wireless communication. A considerable number of machine type communication (MTC) devices in 5G with variable quality of service (QoS) aggravates this challenge even further. Existing Resource allocation schemes in MTC are usually considering signal to noise ratio (SNR), which provides preference to MTC devices based on distance rather than their QoS requirements. This paper proposes a resource allocation scheme with dynamic priorities for MTC devices with multiple radio access technologies (RATs). The proposed resource allocation scheme has two main parts namely medium access and resource allocation. The medium access leverages the broadcast nature of wireless signal and MTC devices’ wait time to assign priorities using capillary band in a secure and integral way. At resource allocation, SNR, total induced transmission delay, and transmission-awaiting MTC devices are used to assign resources in the cellular band. The rumination of two-staged dynamic priorities in the proposed scheduling scheme brings significant performance improvements in outage and success probabilities. Compared to SNR-based schemes, the proposed mechanism performs well by expressively improving the outage and success probability by 20% and 30%, respectively.
Highlights
Machine type communication (MTC) is one of the enabling technologies of fifth generation (5G) networks
The available resources at MTC gateway (MTCG) are allocated on the basis of quality of service (QoS) requirements of the MTC devices by implementing the resource allocation algorithm
If an MTC device fails to transmit in a frame due to collision at medium access phase or unavailability of resources at allocation phase, it subsequently increases its priority, which is captured as inter-frame delay (ζ2), which can be calculated as follows; ζ2(cimj) where g = 1, 2, 3, . . ., is the number of frames during which device cimj failed at medium access or allocation phase and a ≥ 1 is any constant number that controls the priority increment
Summary
Machine type communication (MTC) is one of the enabling technologies of fifth generation (5G) networks. The proposed schemes in [19], [20], [22] used conventional random access mechanism for the contention phase to access an MTCG to send their transmission requests, which treats all transmission requests with the same probability The problem with this approach is that even though higher priority MTC devices can be granted resources on preferential basis, it is only possible if they are successful at the contention phase where all devices are treated . According to [3], [30], [31], a multi-RAT MTC device is capable of communicating in capillary and cellular bands This motivated us to propose a scheduling scheme that leverages multiple RATs to jointly consider MTC devices in MTC cellular and capillary networks, under diverse QoS requirements in addition to privacy and security.
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