Editing Telecommunications network (section)

==Capacity and speed==
In analogy to the improvements in the speed and capacity of digital computers, provided by advances in semiconductor technology and expressed in the bi-yearly doubling of transistor density, which is described empirically by [[Moore's law]], the capacity and speed of telecommunications networks have followed similar advances, for similar reasons. In telecommunication, this is expressed in [[Edholm's law]], proposed by and named after Phil Edholm in 2004.<ref name="Cherry">{{cite journal |last1=Cherry |first1=Steven |title=Edholm's law of bandwidth |journal=IEEE Spectrum |date=2004 |volume=41 |issue=7 |pages=58–60 |doi=10.1109/MSPEC.2004.1309810|s2cid=27580722 }}</ref> This empirical law holds that the [[bandwidth (computing)|bandwidth]] of telecommunication networks doubles every 18 months, which has proven to be true since the 1970s.<ref name="Cherry"/><ref name=":1">{{Cite book|title=Time Multiplexed Beam-Forming with Space-Frequency Transformation|last1=Deng|first1=Wei|last2=Mahmoudi|first2=Reza|last3=van Roermund|first3=Arthur|publisher=Springer|year=2012|isbn=9781461450450|location=New York|pages=1}}</ref> The trend is evident in the [[Internet]],<ref name="Cherry"/> [[cellular network|cellular]] (mobile), [[Wireless LAN|wireless]] and [[local area network|wired local area networks]] (LANs), and [[personal area network]]s.<ref name=":1" /> This development is the consequence of rapid advances in the development of [[MOSFET|metal-oxide-semiconductor technology]].<ref name="Jindal">{{cite book |last1=Jindal |first1=Renuka P. |title=2009 2nd International Workshop on Electron Devices and Semiconductor Technology |chapter=From millibits to terabits per second and beyond – over 60 years of innovation |date=2009 |pages=1–6 |doi=10.1109/EDST.2009.5166093 |chapter-url=https://events.vtools.ieee.org/m/195547 |isbn=978-1-4244-3831-0 |s2cid=25112828 |access-date=2019-10-14 |archive-date=2019-08-23 |archive-url=https://web.archive.org/web/20190823230141/https://events.vtools.ieee.org/m/195547 |url-status=live }}</ref>