A novel method view to estimate 5G spectrum needs for land mobile service

Author(s):  
Shoufeng Wang ◽  
Dongchen Zhang ◽  
Jiwei He ◽  
Wenqi Li ◽  
Deping Xu ◽  
...  
2011 ◽  
pp. 1515-1535
Author(s):  
Katarzyna Wac ◽  
Richard Bults ◽  
Bert-Jan van Beijnum ◽  
Hong Chen

Mobile service providers (MoSPs) emerge, driven by the ubiquitous availability of mobile devices and wireless communication infrastructures. MoSPs’ customers satisfaction and consequently their revenues, largely depend on the quality of service (QoS) provided by wireless network providers (WNPs) available at a particular location-time to support a mobile service delivery. This chapter presents a novel method for the MoSP’s QoS-assurance business process. The method incorporates a location- and time-based QoS-predictions’ service, facilitating the WNP’s selection. The authors explore different business cases for the service deployment. Particularly, they introduce and analyze business viability of QoSIS.net, an enterprise that can provide the QoS-predictions service to MoSPs, Mobile Network Operators (as MoSPs), or directly to their customers (i.e. in B2B/B2C settings). QoSIS.net provides its service based on collaborative-sharing of QoS-information by its users. The authors argue that this service can improve the MoSP’s QoS-assurance process and consequently may increase its revenues, while creating revenues for QoSIS.net.


1991 ◽  
Vol 112 ◽  
pp. 189-189
Author(s):  
B.J. Robinson

ABSTRACTThe problems of protecting passive bands in Australia, India, and Japan reflect the variety of research activities and radio telescopes in those countries, colored by the degree of user friendliness of the frequency management authorities.In India, it is important to protect frequencies below 1400 MHz (for high redshift hydrogen line absorption or emission) and continuum bands at 327 MHz and 150 MHz (the latter currently allocated to cordless phones, paging systems, and rural communication).In Japan, protection from harmful interference has been sought and refused at 4.8 and 5 GHz (microwave network), 10 and 15 GHz (mobile relay service), and 22 GHz (mobile data relay service). But extensive radio astronomy usage of mm to sub-mm bands has established priority for their use and allocation.In Australia, there are major problems at 408 MHz (telephone links), 1.6 GHz (GLONASS, RDSS, and Land Mobile Service), 4.9 to 5 GHz (RDSS), and 22 GHz (satellite broadcasting and high definition TV service).The degree of user friendliness of the frequency management administration appears to rate: 1. Australia, 2. India, 3. Japan on a diminishing scale of cooperation and concern. This affects the awareness of the radio astronomy community of conflicting allocations and the level of input into CCIR and the WARC.


Author(s):  
Katarzyna Wac ◽  
Richard Bults ◽  
Bert-Jan van Beijnum ◽  
Hong Chen ◽  
Dimitri Konstantas

Mobile service providers (MoSPs) emerge, driven by the ubiquitous availability of mobile devices and wireless communication infrastructures. MoSPs’ customers satisfaction and consequently their revenues, largely depend on the quality of service (QoS) provided by wireless network providers (WNPs) available at a particular location-time to support a mobile service delivery. This chapter presents a novel method for the MoSP’s QoS-assurance business process. The method incorporates a location- and time-based QoS-predictions’ service, facilitating the WNP’s selection. The authors explore different business cases for the service deployment. Particularly, they introduce and analyze business viability of QoSIS.net, an enterprise that can provide the QoS-predictions service to MoSPs, Mobile Network Operators (as MoSPs), or directly to their customers (i.e. in B2B/B2C settings). QoSIS.net provides its service based on collaborative-sharing of QoS-information by its users. The authors argue that this service can improve the MoSP’s QoS-assurance process and consequently may increase its revenues, while creating revenues for QoSIS.net.


2020 ◽  
Vol 6 (2) ◽  
pp. 6-18
Author(s):  
B. Antipin ◽  
E. Vinogradov

The analysis of frequency bands allocated among radio services in the Table of frequency allocations reveals that every band is utilized by several different radio services. The sharing of frequency bands by radio services requires that electromagnetic compatibility of the radio electronic equipment belonging to these services shouldbe ensured. Currently there is a rapid development of land mobile radio communication systems. There are concidered the basic parameters of radio transmitters and radio receivers belonging to ATP systems, which are necessary for the electromagnetic compatibility analyzing of such systems between themselves and with other systems sharing a certain frequency band. We can observe ways of using some characteristics.


Author(s):  
M.A. Gregory ◽  
G.P. Hadley

The insertion of implanted venous access systems for children undergoing prolonged courses of chemotherapy has become a common procedure in pediatric surgical oncology. While not permanently implanted, the devices are expected to remain functional until cure of the primary disease is assured. Despite careful patient selection and standardised insertion and access techniques, some devices fail. The most commonly encountered problems are colonisation of the device with bacteria and catheter occlusion. Both of these difficulties relate to the development of a biofilm within the port and catheter. The morphology and evolution of biofilms in indwelling vascular catheters is the subject of ongoing investigation. To date, however, such investigations have been confined to the examination of fragments of biofilm scraped or sonicated from sections of catheter. This report describes a novel method for the extraction of intact biofilms from indwelling catheters.15 children with Wilm’s tumour and who had received venous implants were studied. Catheters were removed because of infection (n=6) or electively at the end of chemotherapy.


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