A scalable framework for mobile real-time group communication services

2013 ◽  
Vol 57 (18) ◽  
pp. 3855-3865 ◽  
Author(s):  
Zohar Naor ◽  
Sajal K. Das
Keyword(s):  
Real Time ◽  
Group Communication ◽  
Communication Services

scholarly journals THE PREDICTION OF PARKING SPACE AVAILABILITY

Transport ◽  
2020 ◽  
Vol 35 (5) ◽  
pp. 462-473
Author(s):  
Helena Brožová ◽  
Miroslav Růžička
Keyword(s):  
Real Time ◽  
Personal Communication ◽  
Navigation Systems ◽  
Parking Space ◽  
Transition Matrices ◽  
Communication Services ◽  
Proposed Model ◽  
Harmful Emissions ◽  
Parking Lot ◽  
Car Park

Intelligent Parking Systems (IPS) allow customers to select a car park according to their preferences, rapidly park their vehicle without searching for the available parking space (place) or even book their place in advance avoiding queues. IPS provides the possibility to reduce the wastage of fuel (energy) while finding a parking place and consequently reduce harmful emissions. Some systems interact with in-vehicle navigation systems and provide users with information in real-time such as free places available at a given parking lot (car park), the location and parking fees. Few of these systems, however, provide information on the forecasted utilisation at specific time. This paper describes results of a traffic survey carried out at the parking lot of supermarket and the proposal of the model predicting real-time parking space availability based on these surveyed data. The proposed model is formulated as the non-homogenous Markov chains that are used as a tool for the forecasting of parking space availability. The transition matrices are calculated for different time periods, which allow for and include different drivers’ behaviour and expectations. The proposed forecasting model is adequate for potential use by IPS with the support of different communication means such as the internet, navigation systems (GPS, Galileo etc.) and personal communication services (mobile-phones).

Using a Smartphone as a Track and Fall Detector

2015 ◽  
pp. 272-295
Author(s):  
Chia-Yin Ko ◽  
Fang-Yie Leu ◽  
I-Tsen Lin
Keyword(s):  
Social Networks ◽  
Emergency Medical Services ◽  
Real Time ◽  
Family Caregivers ◽  
Fall Detection ◽  
The Elderly ◽  
Elderly Individual ◽  
Communication Services ◽  
People With Dementia

This chapter proposes a smartphone-based system for both indoor and outdoor monitoring of people with dementia. The whole system comprises wandering detection, safety-zone monitoring, fall detection, communication services, alert notifications, and emergency medical services. To effectively track the elderly, the proposed system uses a smartphone camera to take real-time pictures along the user's path as he or she moves about. Those photos, accompanied with time and GPS signals, are delivered to and stored on the Cloud system. When necessary, family caregivers can download those data to quickly find a way to help the elderly individual. Additionally, this study uses tri-axial accelerometers to examine falls. To assure individuals' data is safeguarded appropriately, an RSA method has been adopted by the system to encrypt stored data. This reliable and minimally intrusive system provides people with dementia with an opportunity to maintain their social networks and to improve their quality of lives.

scholarly journals A Packet Scheduling Method Based on Dynamic Adjustment of Service Priority for Electric Power Wireless Communication Network

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Bo Hu ◽  
Xin Liu ◽  
Jinghong Zhao ◽  
Siya Xu ◽  
Zhenjiang Lei ◽  
...  
Keyword(s):  
Communication Network ◽  
Electric Power ◽  
Real Time ◽  
Resource Utilization ◽  
Packet Scheduling ◽  
Dynamic Adjustment ◽  
Communication Services ◽  
Network Bandwidth ◽  
Scheduling Method ◽  
Service Priority

With the development of the energy Internet, power communication services are heterogeneous, and different power communication services have different business priorities. The power communication services with different priorities have different requirements for network bandwidth and real-time performance. For traditional unified service, a scheduling method cannot meet these service requirements at the same time, and electric power communication network cannot guarantee the quality of service. Therefore, how to make full use of the time-varying characteristics of communication resources to meet the business needs of different priorities and achieve the goals of high resource utilization and transmission quality has become one of the urgent problems in the power communication network. For this reason, in order to adapt to the real-time congestion of the network, we have designed a packet scheduling method based on the dynamic adjustment of service priority, which dynamically adjusts the priority of the power service on the node; in addition, an evaluation method for the trust value of wireless forwarding nodes is introduced to improve the security of data transmission; and finally, we valuate the channel quality to establish a reasonable and efficient packet scheduling mechanism for services of different priorities. Simulation results show that this method improves the communication performance of high-priority services and improves the spectrum resource utilization of the entire system.

Advanced Wireless IP Access System (WIPAS) for Higher Speed and Real-Time Communication Services

2009 ◽  
Author(s):  
Kiyohiko Itokawa ◽  
Toru Nishikawa ◽  
Akira Matsushita ◽  
Mitsuru Nishino ◽  
Yasunari Takahata ◽  
...  
Keyword(s):  
Real Time ◽  
Communication Services ◽  
Access System ◽  
Wireless Ip

scholarly journals Robot Scheduling for Assistance and Guidance in Hospitals

2021 ◽  
Vol 12 (1) ◽  
pp. 337
Author(s):  
Cheng-Yan Siao ◽  
Ting-Hsuan Chien ◽  
Rong-Guey Chang
Keyword(s):  
Real Time ◽  
Medical Staff ◽  
Robot Control ◽  
Control Rights ◽  
Communication Services ◽  
Security Personnel ◽  
Patient Guidance

At present, the global COVID-19 epidemic has not slowed down. To reduce the contact between people during the epidemic and prevent the epidemic from expanding, we have developed a robot to assist medical staff in patient guidance and communication services. The robot can provide an emergency contact so that users can immediately contact the counter for help. The user does not have face-face contact with the medical staff. When the robot encounters obstacles in the path of travel, the detected event and the time of occurrence are sent back to the back-end system. It also provides security personnel with real-time images and robot control rights to understand the situation and deal with it in real-time.

Using a Smartphone as a Track and Fall Detector

2016 ◽  
pp. 922-944
Author(s):  
Chia-Yin Ko ◽  
Fang-Yie Leu ◽  
I-Tsen Lin
Keyword(s):  
Social Networks ◽  
Emergency Medical Services ◽  
Real Time ◽  
Family Caregivers ◽  
Fall Detection ◽  
The Elderly ◽  
Elderly Individual ◽  
Communication Services ◽  
People With Dementia

This chapter proposes a smartphone-based system for both indoor and outdoor monitoring of people with dementia. The whole system comprises wandering detection, safety-zone monitoring, fall detection, communication services, alert notifications, and emergency medical services. To effectively track the elderly, the proposed system uses a smartphone camera to take real-time pictures along the user's path as he or she moves about. Those photos, accompanied with time and GPS signals, are delivered to and stored on the Cloud system. When necessary, family caregivers can download those data to quickly find a way to help the elderly individual. Additionally, this study uses tri-axial accelerometers to examine falls. To assure individuals' data is safeguarded appropriately, an RSA method has been adopted by the system to encrypt stored data. This reliable and minimally intrusive system provides people with dementia with an opportunity to maintain their social networks and to improve their quality of lives.

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