Presentation on theme: "Solving the Shelford-Buckland Noise Problem Presenter: Orin Laney, PE NCE 650-996-8423) August 23, 2010, 4 - 6 PM San Carlos City Hall,"— Presentation transcript:
Solving the Shelford-Buckland Noise Problem Presenter: Orin Laney, PE NCE ) August 23, 2010, PM San Carlos City Hall, Room 207
Overview of the Problem Cellular providers offer a widely acknowledged public good Access to appropriate facilities is necessary, and mandated by Federal Law Typical installations are designed for operation in industrial, commercial, and rural settings Immediate proximity to residential areas = noise complaints
San Carlos Response Noise complaints => commission a noise survey Basis of survey is limits set forth in noise ordinance Noise ordinance is based on A- weighted measurements A-weighted measurements are inadequate for LF noise.
…a drawback of A-weighting is that it simulates the human hearing system only for sounds with small bandwidths and low levels. In real life, however, most sound sources produce broadband spectra at mid or high levels. Nevertheless, the underlying concept that noise measurements should be based on features of the human hearing system deserves our appreciation and is still valid. Since the last twenty years or so, psychoacoustically based metrics are used more and more…
In the long term, San Carlos and other Bay Area cities will need noise ordinances based on modern acoustic science. In the here and now, San Carlos must deal with complaints originating in the Shelford- Buckland neighborhood.
The Problem with Solving the Problem The usual paradigm is verifying the nature and magnitude of the problem and assigning blame Political solutions to technical problems are almost always faulty They tend to be palliative (sound walls, stricter laws) rather than curative (find new solutions that sidestep or eliminate the fundamental problem)
Fortunately, a viable technical solution exists
And here it is…!
The General Idea…
Green Solutions Are Available NOW from Major Equipment Vendors. Here are a half dozen examples…
TelASIC TelASIC Communications, a leading developer of Remote Radio Head (RRH) products for WCDMA / HSDPA infrastructure, today announced immediate availability of its fan-less 60W RRH.
Fujitsu The RRH of the BroadOne LS LTE eNodeB is compact and light weight, enabling installation anywhere there is fiber, up to 20 km from the RRH. The highly efficient design provides low operating costs as less heat translates to no fans, no filters, or any other moving parts.
NEC In a conventional base station, a cooling fan consumes 10–20% of the overall energy. …efficient heat transfer allowed NEC to move to fanless operation. In addition to saving energy, the fanless architecture reduces noise pollution and enhances reliability and maintainability by removing the mechanical moving parts from the base station.
Huawei Huawei emphasizes the importance of eco-design …high efficiency amplifier technologies make convection cooling, direct cooling, and intelligent cooling possible. This reduces the need for air conditioners that cause noise pollution and helps reduce base station electricity consumption to less than 500W. m
ZTE 8000 series GSM base stations employ chimney effect convection cooling, eliminating the requirement for electronic cooling fans… ZTE GSM base station solutions potentially consume 70% less power than comparable 2007 industry solutions and offer up to 50% power reduction with current 2008 products. tml
Alcatel-Lucent By utilizing high efficiency amplifiers and convection-cooled (fanless), noise- free RRHs, Alcatel-Lucent lowered power consumption by up to 50 percent over traditional products. …zero-footprint approach with no huts and no cranes [PDF] Alcatel-Lucent CDMA Distributed Base Station PortfolioAlcatel-Lucent CDMA Distributed Base Station Portfolio
Restating the Problem The fundamental problem is not noise as such. Rather, it is the use of older, power hungry technologies that require mechanical cooling, one consequence of which is noise. The wireless industry has solved the fundamental problem, and relief for the Shelford-Buckland neighborhood amounts to using it.
Off-the-Shelf Technology Remote Radio Heads Reduced Power Footprint Silent, Fanless Design
Conclusion By mandating appropriate technology in residential neighborhoods, San Carlos can accommodate the wireless industry without compromising Quality of Life for its Citizens!