The cognitive radio (CR) technique is considered as a better and more efficient answer to the predicament brought by the high demands of wireless communication services and the scarcity or low utilization of frequency spectrum resources.
The same search terms were used in all the databases and these were various combinations of: pregnant women, childbirth, cell phone, mobile phone, radio communication, mobile health, mhealth, maternal health services, emergency medical services, and medical help.
Alongside Ranzure's 5G RAN technology, through Mitel it will pick up technology and IP in Voice-over-Long-Term Evolution ("VoLTE"), Voice-over-WiFi ("VoWiFi"), video, Rich Communication Services ("RCS"), messaging, radio access and packet core solutions.
As usual, amateur radio operators (hams) were highly useful in providing decentralized emergency communication services, both for voice and data (packet radio), especially where power was absent and other means of communication unavailable [ 4, 5].
Because of an inadequate radio communication, most of the police units and some of the ambulance services had difficulties locating the ferry.
Due to the rapid growth in the field of radio communication, most of the available spectrum has already become congested, and the assignment of frequencies to new services is currently a critical problem.
However, it would be greatly beneficial to deploy broadband data communication services within the spectrum currently devoted to the PMR network[7], making use of the advantages of cognitive radio.
Self-organization of radio access networks is regarded as a new approach that enables cost-effective support of a range of high-quality mobile communication services and applications for acceptable prices.
Radio communication kept breaking down.
8 50 51 Last radio communication with aircraft.
