In wireless engineering jargon, a greenfield is a project which lacks any constraints imposed by prior networks. The first cellular telephone networks were built primarily on tall existing tower structures or on high ground in an effort to cover as much territory as possible, quickly, and with a minimum number of base stations. They were developed with no regard for future capacity considerations or Frequency reuse.

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  • In wireless engineering jargon, a greenfield is a project which lacks any constraints imposed by prior networks. The first cellular telephone networks were built primarily on tall existing tower structures or on high ground in an effort to cover as much territory as possible, quickly, and with a minimum number of base stations. They were developed with no regard for future capacity considerations or Frequency reuse. These early wireless telephone network designs were later augmented with additional base stations and antennas to handle the growing demand for additional voice traffic and higher network capacity. As wireless networks quickly evolved it was evident that the earlier designs forced inefficient constraints on the growth of the network. As governments made more radio spectrum available for licensed wireless telephone operators in the late 80's whole new networks popped up that surpassed the performance of legacy networks having the benefit of starting their designs fresh and without the constraints of existing systems. These whole new cellular networks were constructed with new infrastructure and primarily on new sites in suburban areas or green fields. They were termed "greenfield networks" or "greenfield projects". Today any new network designed from scratch to enable new Radio Access Network technologies (i. e 3G, 4G, Wi-MAX, etc.. ) are also referred to as greenfield projects. Similarly in other disciplines like software engineering, a greenfield is also a project which lacks any constraints imposed by prior work. The analogy is to that of construction on greenfield land where there is no need to remodel or demolish an existing structure. Such projects are often coveted by software engineers for this reason, but in practice, they can be quite rare. Greenfield carries a similar meaning with modern wireless LAN networks. 802.11n Wi-Fi networks have an optional greenfield mode that improves efficiency by eliminating support for 802.11a/b/g devices. Today, the term Greenfield is not restricted to software domain. Examples of greenfield projects are new factories, power plants, airports which are built from scratch on greenfield land. Those facilities which are modified/upgraded are called Brownfield projects (often the pre-existing site/facilities are contaminated/polluted. ) Greenfield also has meaning in sales. A greenfield opportunity refers to a marketplace that is completely untapped and free for the taking.
  • El concepto Greenfield (tierra verde, terreno virgen" se refiere a realizar un proyecto desde cero o cambiar completamente uno existente. La imagen es aquella construcción de la tierra de greenfield, donde no es necesario remodelar o demoler una estructura existente.
  • 绿地模式（Greenfield，又譯為綠燈區模式）是用于无线网络IEEE802.11n通訊協定中的一种提高传输速率的模式。它拥有最大的速度传输，最广的传输范围。以发挥IEEE802.11n的最大潜能。 綠燈區模式在使用時會忽略掉早期的一些標準，它名稱的意義也在於是全速通行的「綠燈」，而沒有「黃燈」（指的是速度較慢的早期通訊協定標準IEEE 802.11a與IEEE 802.11g）、「紅燈」（指的是IEEE 802.11b）。如果某個無線網路採用此種標準，則使用IEEE 802.11a、IEEE 802.11b與IEEE 802.11g的使用者就無法使用該網路。但是支援IEEE802.11n的使用者則可以享受最快的傳輸速度。
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  • In wireless engineering jargon, a greenfield is a project which lacks any constraints imposed by prior networks. The first cellular telephone networks were built primarily on tall existing tower structures or on high ground in an effort to cover as much territory as possible, quickly, and with a minimum number of base stations. They were developed with no regard for future capacity considerations or Frequency reuse.
  • El concepto Greenfield (tierra verde, terreno virgen" se refiere a realizar un proyecto desde cero o cambiar completamente uno existente. La imagen es aquella construcción de la tierra de greenfield, donde no es necesario remodelar o demoler una estructura existente.
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  • Greenfield project
  • Proyecto Greenfield
  • 绿地模式
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