An activity-based mobility model and location management simulation framework

1999 ◽  
Author(s):  
John Scourias ◽  
Thomas Kunz
Keyword(s):  
Location Management ◽  
Mobility Model ◽  
Simulation Framework

scholarly journals A Comprehensive Open-Source Simulation Framework for LiFi Communication

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2485
Author(s):  
Shakir Ullah ◽  
Saeed Ur Rehman ◽  
Peter Han Joo Chong
Keyword(s):  
Open Source ◽  
Hybrid System ◽  
Resource Sharing ◽  
Optical Gain ◽  
Packet Delay ◽  
Mobility Model ◽  
Network Simulator ◽  
Simulation Framework ◽  
Light Spectrum ◽  
Seamless Integration

Light Fidelity (LiFi) is a new candidate for wireless networking that utilizes the visible light spectrum and exploits the existing lighting infrastructure in the form of light-emitting diodes (LEDs). It provides point-to-point and point-to-multipoint communication on a bidirectional channel at very high data rates. However, the LiFi has small coverage, and its optical gain is closely related to the receiver’s directionality vis-à-vis the transmitter, therefore it can experience frequent service outages. To provide reliable coverage, the LiFi is integrated with other networking technologies such as wireless fidelity (WiFi) thus forming a hybrid system. The hybrid LiFi/WiFi system faces many challenges including but not limited to seamless integration with the WiFi, support for mobility, handover management, resource sharing, and load balancing. The existing literature has addressed one or the other aspect of the issues facing LiFi systems. There are limited free source tools available to holistically address these challenges in a scalable manner. To this end, we have developed an open-source simulation framework based on the network simulator 3 (ns-3), which realizes critical aspects of the LiFi wireless network. Our developed ns-3 LiFi framework provides a fully functional AP equipped with the physical layer and medium access control (MAC), a mobility model for the user device, and integration between LiFi and WiFi with a handover facility. Simulation results are produced to demonstrate the mobility and handover capabilities, and the performance gains from the LiFi-WiFi hybrid system in terms of packet delay, throughput, packet drop ratio (PDR), and fairness between users. The source code of the framework is made available for the use of the research community.

scholarly journals Paging and Location Management in IEEE 802.16j Multihop Relay Network

2010 ◽  
Vol 2010 ◽  
pp. 1-15 ◽  
Author(s):  
Kuan-Po Lin ◽  
Hung-Yu Wei
Keyword(s):  
Location Management ◽  
Mobile Station ◽  
Mobility Model ◽  
Base Stations ◽  
Relay Network ◽  
Location Update ◽  
Idle Mode ◽  
Ieee 802.16J ◽  
Paging Area ◽  
Wireless Broadband

IEEE 802.16j is an emerging wireless broadband networking standard that integrates infrastructure base stations with multihop relay technology. Based on the idle mode operation in IEEE 802.16j, we propose a novel location management and paging scheme. It integrates the paging area-based and the timer-based location update mechanism. In paging area-based scheme, an idle mode mobile station updates when it moves to a new paging area. In timer-based scheme, an idle mode MS updates when the location update timer expires. In this work, we formulate the mathematical model to evaluate the performance of the proposed paging scheme. A new random walk mobility model that is suitable for modeling in multihop relay network is created. Optimization of location update timer is also investigated.

The Lost String: Unusual Location & Management

2019 ◽  
Vol 9 (7) ◽  
pp. p9155
Author(s):  
Shrikrushna Chavan ◽  
Arundhati Tilve ◽  
C.V. Hegde
Keyword(s):  
Location Management ◽  
Unusual Location

Cluster-Based Location Management Scheme for Wireless Mesh Networks

2010 ◽  
Vol 21 (6) ◽  
pp. 1404-1415
Author(s):  
Wei-Qi HU ◽  
Shi-Hong ZOU ◽  
Shi-Duan CHENG ◽  
Bo HU ◽  
Wen-Dong WANG
Keyword(s):  
Wireless Mesh Networks ◽  
Mesh Networks ◽  
Location Management ◽  
Wireless Mesh ◽  
Management Scheme

A Multi-National Simulation Framework for Maritime Missile Defense

2006 ◽  
Author(s):  
Richard Reading ◽  
Ronald Sawyer ◽  
Jan Wind
Keyword(s):  
Simulation Framework ◽  
Missile Defense
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