In this letter, a wireless power transfer (WPT) assisted full-duplex non-orthogonal multiple access (WPT-NOMA) transmission scheme for massive machine type communications (mMTC) scenario in the 5G and beyond cellular networks has been investigated. The proposed WPT-NOMA allows uplink downlink users to share energy radio resources simultaneously, which is crucial mMTC support energy-constrained ...

Massive machine type communications (mMTC) is one of the three major scenarios in 5G wireless networks. mMTC an uplink-dominant scenario that supports massive connectivity small-size packets and sporadic traffic. To meet requirement mMTC, non-orthogonal multiple access (NOMA) with grant-free transmission considered a promising technology because its higher spectrum efficiency lower signaling ov...

The hypothalamus, which is the initial part of the hypothalamic-pituitary-adrenal (HPA) axis, plays a critical role in regulating stress in the central nervous system. The present study aimed to determine whether endoplasmic reticulum stress in hypothalamic neurons is differentially stimulated by varying durations of stress exposure, which ultimately leads to pathological changes in neurons by ...

Future wireless networks need to support massive machine type communication (mMTC) where a number of devices accesses the network and MIMO is promising enabling technology. Massive access schemes have been studied for co-located arrays. In this paper, we investigate activity detection in grant-free random mMTC cell-free using distributed Each active device transmits non-orthogonal pilot sequenc...

Grant-free access is considered as a key enabler for massive machine-type communications (mMTC) it promotes energy-efficiency and small signalling overhead. Due to the sporadic user activity in mMTC, joint identification channel estimation (JUICE) main challenge. This paper addresses JUICE single-cell mMTC with single-antenna users multi-antenna base station (BS) under spatially correlated fadi...

The central challenge in massive machine-type communications (mMTC) is to connect a large number of uncoordinated devices through limited spectrum. typical mMTC communication pattern sporadic, with short packets. This could be exploited grant-free random access which the activity detection, channel estimation, and data recovery are formulated as sparse problem solved via compressed sensing algo...

In this letter, we study the joint device activity and delay detection problem in asynchronous massive machine-type communications (mMTC), where all active devices asynchronously transmit their preassigned preamble sequences to base station (BS) for identification detection. We first formulate as a maximum likelihood estimation problem, which depends on received signal only through its sample c...

With the emerging Internet of Things paradigm, massive Machine-Type Communication (mMTC) has been identified as one prominent services that enables a broad range applications with various Quality Service (QoS) requirements for 5G-and-beyond networks. However, it is very difficult to employ monolithic physical network support mMTC differentiated QoS requirements. Moreover, in ultra-dense mobile ...

Grant-free random access is a key enabler in massive machine-type communications (mMTC) to reduce signalling overhead and latency thereby improving the energy efficiency. One of its main challenges lies joint user activity identification channel estimation (JUICE). Due sporadic mMTC traffic, JUICE can be solved as compressive sensing (CS) problem. We address CS-based uplink with single-antenna ...