Manipulating the cross-layer channels in g-C3N4 nanosheet membranes for enhanced molecular transport

2021 ◽  
Vol 9 (7) ◽  
pp. 4193-4202
Author(s):  
Xiaoli Wu ◽  
Xulin Cui ◽  
Qi Wang ◽  
Jingtao Wang ◽  
Wenjia Wu ◽  
...  
Keyword(s):  
Polar Solvent ◽  
Molecular Transport ◽  
Cross Layer ◽  
Nonpolar Solvents ◽  
Gate Effect ◽  
The Cross

Cross-layer channels display ‘gate effect’ to govern molecular selectivity for lamellar membranes. Membranes with hydrophilic/hydrophobic heterostructured channels acquire elevated polar solvent permeance and polar/nonpolar solvents selectivity.

Cross-Layer Radio Resource Management Protocols for QoS Provisioning in Multimedia Wireless Networks

2010 ◽  
pp. 463-486
Author(s):  
Tarek Bejaoui ◽  
Nidal Nasser
Keyword(s):  
Wireless Networks ◽  
Real Time ◽  
Packet Scheduling ◽  
Radio Resource Management ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Qos Provisioning ◽  
Multimedia Wireless Networks ◽  
The Cross ◽  
Layered Design

This chapter introduces the cross layer design for resource allocation over multimedia wireless networks. Conventional layered packet scheduling and call admission control schemes are presented and a number of cross-layered protocols that are recently proposed are investigated. The chapter highlights the QoS improvement and the performance gain obtained while considering the interlayer dependencies concept for various real-time and non-real-time applications. The authors hope that this chapter will assist in the understanding of the cross layering and its enhancement of the layered design for QoS provisioning in future multimedia wireless networks.

Formal Methods in Cross Layer Modeling and Optimization of Wireless Networks

2010 ◽  
pp. 410-436 ◽  
Author(s):  
Dzmitry Kliazovich ◽  
Michael Devetsikiotis ◽  
Fabrizio Granelli
Keyword(s):  
Wireless Networks ◽  
Formal Methods ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Future Directions ◽  
Modeling And Optimization ◽  
Wired Networks ◽  
Fast Development ◽  
The Cross ◽  
Cross Layering

The layering principle has been long identified as a way to increase the interoperability and to improve the design of telecommunication protocols, where each layer offers services to adjacent upper layers and requires functionalities from adjacent lower ones. In the past, layering has enabled fast development of interoperable systems, but at the same time limited the performance of the overall architecture, due to the lack of coordination among layers. This issue is particularly relevant for wireless networks, where the very physical nature of the transmission medium introduces several performance limitations for protocols designed for wired networks. To overcome these limitations, a modification of the layering paradigm has been proposed, namely, cross-layer design, or “cross-layering.” Several cross-layering approaches have been proposed in the literature so far. Nevertheless, little formal characterization of the cross-layer interaction among different levels of the protocol stack is available yet. A clear need exists for identifying approaches able to analyze and provide quantitative guidelines for the design of cross-layer solutions, and, more importantly, to decide, in each case, whether cross-layering represents an effective solution or not. This chapter provides a detailed survey of the state-of-the-art and future directions in the usage of formal methods for cross-layer modeling and optimization of wireless networks. The text starts by detailing the principles of layered (ISO/OSI and TCP/IP) protocol stacks as well as the cross-layer paradigm. An overview of the architectures of existing and perspective wireless networks is presented along with an analysis of the potential limitations deriving from the layering approach and detailed description of possible optimization solutions enabled by cross-layer design. Subsequent sections are devoted to the issues of modeling and optimization of wireless networks. The remaining sections cover performance optimization as well as architecture optimization (specifically in terms of signaling). The chapter ends with a summary and outlines about future directions of research on the topic.

Cross-Layer Radio Resource Management Protocols for QoS Provisioning in Multimedia Wireless Networks

2010 ◽  
pp. 417-441
Author(s):  
Tarek Bejaoui ◽  
Nidal Nasser
Keyword(s):  
Wireless Networks ◽  
Real Time ◽  
Packet Scheduling ◽  
Radio Resource Management ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Qos Provisioning ◽  
Multimedia Wireless Networks ◽  
The Cross ◽  
Layered Design

This chapter introduces the cross layer design for resource allocation over multimedia wireless networks. Conventional layered packet scheduling and call admission control schemes are presented and a number of cross-layered protocols that are recently proposed are investigated. The chapter highlights the QoS improvement and the performance gain obtained while considering the interlayer dependencies concept for various real-time and non-real-time applications. The authors hope that this chapter will assist in the understanding of the cross layering and its enhancement of the layered design for QoS provisioning in future multimedia wireless networks.

Design of the Cross-Layer QoS Framework for the IEEE 802.16 PMP Networks

2008 ◽  
Vol E91-B (5) ◽  
pp. 1360-1369 ◽  
Author(s):  
Y.-T. MAI ◽  
C.-C. YANG ◽  
Y.-H. LIN
Keyword(s):  
Ieee 802.16 ◽  
Cross Layer ◽  
The Cross
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