Results 31 to 40 of about 678,028 (273)

An Adaptive Channel Access Method for Dynamic Super Dense Wireless Sensor Networks

open access: yesSensors, 2015
Super dense and distributed wireless sensor networks have become very popular with the development of small cell technology, Internet of Things (IoT), Machine-to-Machine (M2M) communications, Vehicular-to-Vehicular (V2V) communications and public safety ...
Chunyang Lei   +3 more
doaj   +1 more source

Online Contention Resolution Schemes

open access: yes, 2015
We introduce a new rounding technique designed for online optimization problems, which is related to contention resolution schemes, a technique initially introduced in the context of submodular function maximization. Our rounding technique, which we call
Feldman, Moran   +2 more
core   +1 more source

On Maximum Contention-Free Interleavers and Permutation Polynomials over Integer Rings [PDF]

open access: yes, 2005
An interleaver is a critical component for the channel coding performance of turbo codes. Algebraic constructions are of particular interest because they admit analytical designs and simple, practical hardware implementation. Contention-free interleavers
Takeshita, Oscar Y.
core   +2 more sources

A Scalable Hybrid MAC Protocol for Massive M2M Networks

open access: yes, 2013
In Machine to Machine (M2M) networks, a robust Medium Access Control (MAC) protocol is crucial to enable numerous machine-type devices to concurrently access the channel.
Cao, Xianghui   +3 more
core   +1 more source

Holistic assessment of call centre performance

open access: yesIET Networks, 2017
In modern call centres 60–70% of the operational costs come in the form of the human agents who take the calls. Ensuring that the call centre operates at lowest cost and maximum efficiency involves a trade‐off of the cost of agents against lost revenue ...
Edward A. Smith, John A. Schormans
doaj   +1 more source

OrMAC: A Hybrid MAC Protocol Using Orthogonal Codes for Channel Access in M2M Networks

open access: yesSensors, 2017
This paper proposes a hybrid medium access protocol named orthogonal coded medium access control (OrMAC), which extends the principle of distributed queuing collision avoidance protocol (DQCA) of wireless local area network (WLAN) to delay-sensitive ...
Ethungshan Shitiri   +2 more
doaj   +1 more source

An analytical model of contention in wireless sensor networks using tree routing

open access: yesTạp chí Khoa học và Công nghệ
Presently, the focus of current research on Wireless Sensor Networks (WSNs) is predominantly on contention at the MAC layer, overlooking the traffic characteristics of upper-layer traffic, especially the interaction with the routing traffic.
Vo Que Son
doaj   +1 more source

Contention of Meaning in WhatsApp Cultural Group A Semantic Cognitive Analysis

open access: yesEthical Lingua: Journal of Language Teaching and Literature, 2021
The discourse of interpersonal communication in social media group contains of turn adjacency and simultaneous feedback of communication. Especially in WhatsApp group, the model of communication constructs a discourse by using a certain ideological mode ...
Afdhal Kusumanegara   +3 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

A Game-Theoretic Framework for Medium Access Control [PDF]

open access: yes, 2008
In this paper, we generalize the random access game model, and show that it provides a general game-theoretic framework for designing contention based medium access control.
Chen, Lijun, Cui, Tao, Low, Steven H.
core   +1 more source

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