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Trend: The next five years in wireless
|26 февраля 2007|
The main technological developments:
- New generations of highly integrated digital signal processors
- (DSPs) and analog radio components, which continue to offer higher performance with lower power consumption at affordable costs.
- Hundreds of Kbps to tens of Mbps on mobile phones, sufficient or extremely compressed low-definition TV broadcasts.
- Up to hundreds of Mbps for WLANs, sufficient for highly compressed, high-definition TV.
- Metropolitan-area networks (MANs) with bit rates approaching WLANs and coverage over several miles.
These technological changes will lead to profound changes in the wireless landscape. Currently there exist two categories of networks, largely in competition with each other: Voice-centric cellular with circuit-switched delivery in real time; and data-centric WLAN with IP-based, best effort packet-switched delivery. The most significant change in the overall wireless network in the next few years, according to Gatherer and Kumara, "will be the merger of these into a single data network where the application-agnostic world of IP delivery will be tempered with a desire to support multiple applications, some of which have no real-time constraints and some that have significant real-time constraints in a wireless environment."
The convergence of the two categories of networks will mean:
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