The 60Ghz Wireless Network Infrastructure
Total Page:16
File Type:pdf, Size:1020Kb
The 60GHz Wireless Network Infrastructure F e b r u a r y 2011 /The 60GHz Wireless Network Infrastructure | February 2011 TABLE OF CONTENTS Abstract ............................................................................................. 3 Abbreviations .................................................................................... 4 Market Challenges in Networking Technologies ............................... 5 Solution: The 60GHz Wireless Network Infrastructure ..................... 6 60GHz Standardization ................................................................... 10 Safety concerns of 60GHz wireless devices ................................... 12 Conclusion....................................................................................... 13 Reference ........................................................................................ 14 Authors Info ..................................................................................... 14 © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. /The 60GHz Wireless Network Infrastructure | February 2011 Abstract The widespread availability and use of high definition multimedia content has created a need for faster wireless connectivity that currently available commercial standards have not been able to deliver. The consumers have more digital infotainment choices than ever before, but at the expense of ever increasing network bandwidth and data transfer demands. FCC has made available 7 GHz (57 – 64GHz) of unlicensed bandwidth in the 60GHz band providing potential for data rates of several Gigabits/s. The unique propagation characteristics of the 60GHz band is ideally suited for deployment of gigabit wireless systems to provide secure, short range wireless links with high bandwidth and multi gigabit data rates. The small wavelengths at 60GHz enable the design of sophisticated interfaces with very small form factors and the semiconductor technology has also advanced to enable the design of semiconductor packages that embed the antenna directly within it. The 60GHz band offers an unlicensed high bandwidth, high interference immunity, high security and high frequency re-use. The 60GHz infrastructure could significantly change the way the electronic devices communicate to each other. It paves the road to a future wireless ecosystem offering high performance devices that can work together seamlessly to connect people in the digital age. Research and methodical comprehensive investigation is in progress concerning the usability of the 60GHz band as well as the elaboration of efficient system and implementation concepts in various domains like telemedicine, industry automation, aircraft cabin systems and intra vehicular communication systems. In this technical paper the market challenges in the wireless infrastructure, the 60GHz wireless band and its properties, the benefits of the 60GHz band, the various standardization efforts and the safety concerns for devices operating in the 60GHz band are discussed. © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. 3 /The 60GHz Wireless Network Infrastructure | February 2011 Abbreviations Sl. No. Acronyms Full form (Page No.) 1 HD (5) High Definition 2 QoS (5) Quality-of-Service 3 mmWave (6) Milli Meter Wave 4 FCC (6) Federal Communications Commission 5 P2P (6) Point-to-Point 6 WPAN (6) Wireless Personal Area Networks 7 UWB (6) Ultra Wide Band 8 FSO (9) Free Space Optical 9 HFR (9) Hybrid FSO Radio 10 ECMA (10) European Computer Manufacturers Association 11 ETRI (10) Electronics and Telecommunications Research Institute 12 PAL (10) Protocol Abstraction Layer 13 LoS (10) Line of Sight 14 NLoS (10) Non Line of Sight 15 WVAN (10) Wireless Video Area Network 16 A/V (10) Audio/ Video 17 PHY (10) Physical Layer 18 MAC (10) Medium Access Control 19 WiGig (11) Wireless Gigabit 20 Wi-Fi (11) Wireless Fidelity © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. 4 /The 60GHz Wireless Network Infrastructure | February 2011 Market Challenges in Networking Technologies Advancements in the networking technologies have changed the life of people in their private residential space. With the advent of HD multimedia services and broadband communications into the living space, future networks are expected to support high speed device- to-device connectivity with QoS provisioning. The widespread availability and use of high definition multimedia content has created a need for faster wireless connectivity that currently available commercial standards have not been able to deliver. The consumers have more digital infotainment choices than ever before, but at the expense of ever increasing network bandwidth and data transfer demands. There is no prize for guessing that it has to be wireless communication which creates maximal freedom. Nevertheless, it is doubtful that the current networking technologies can sufficiently lead to the expected future of HD multimedia. The prime concern being that the maximum data rate and QoS that the network is expected to deliver have already being pushed to the limits, which leads to users experience far from satisfying. The figure below depicts the wireless technologies available, the applications and the new opportunity space in the wireless gigabit transfers. © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. 5 /The 60GHz Wireless Network Infrastructure | February 2011 Solution: The 60GHz Wireless Network Infrastructure The potential candidate to address the issues of short distance, secure and high bandwidth communication are the mmWaves. mmWaves can be classified as electromagnetic spectrum that spans between 30GHz to 300GHz, which corresponds to wavelengths from 10mm to 1mm. In this paper, the deliberations are specifically on 60GHz radio (unless otherwise specified, the terms 60GHz and mmWave can be used interchangeably), which has emerged as one of the most promising candidates for multigigabit wireless communication systems. There have been several research initiatives taken to study and facilitate the commercialization of the 60GHz technology. In 2001, FCC allocated 7GHz in the 57–64 GHz band for unlicensed use. This along with the advances in the wireless communication technologies has once again rekindled the interest to explore this band for the P2P communication, which was once perceived to be expensive. The immediately seen opportunities in this particular region of spectrum include next-generation WPANs, WLANs and fixed wireless. The mmWave technology can provide a global wireless ecosystem of interoperable, high performance devices that work together seamlessly to connect people in the digital age. It could bring together a huge range of computing, entertainment and communication devices. It can be used to seamlessly transmit uncompressed HD videos to provide a good user experience for infotainment and gaming solutions consumers. Signals in this band don't travel very far. The atmospheric oxygen readily absorbs 60GHz signals and attenuates (15dB/km) them within a short distance of their source. mmWaves are attenuated by obstacles like glass and Wall which adds further restriction to the usage on the contrary it means that it can be used for high bandwidth short distance secure communication. The below table shows the comparison of wireless HD video technologies: Frequency Range Theoretical max Theoretical max data rate range 60GHz 57-66 GHz 6 Gbps In room 802.11n 2.4, 5 GHz 300 Mbps 70 metres UWB 3.1 – 10.6 GHZ 480 Mbps 20 metres WirelessHD 57-64 GHz 4Gbps 10 metres WHDI 5.1-5.8 GHz 3 Gbps 30 metres The further sections are organized to discuss the characteristics, standardization and safety aspects of mmWaves. © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. 6 /The 60GHz Wireless Network Infrastructure | February 2011 Propagation characteristics of 60GHz spectrum Atmospheric Absorption The 60-GHz mmWave region of the electromagnetic spectrum is characterized by high levels of atmospheric radio frequency energy absorption. This implies that transmitted energy is quickly absorbed by oxygen molecules in the atmosphere over long distances. The atmospheric absorption for mmWave frequencies is shown in below figure. High levels of atmospheric absorption resulting in range limitations poses additional challenges for long-haul wireless applications. However, for short-distance transmission and high-security transmission paths the mmWave technologies and 60GHz mmWave systems in particular are an ideal solution. Frequency Reuse Another consequence of Oxygen absorption is that radiation from one particular 60GHz radio link or source is quickly reduced to a level that will not interfere with other 60GHz links operating in the same geographic vicinity. This reduction enables more 60GHz links to operate in the same geographic area than links with longer ranges. This characteristic also makes it possible to deploy numerous radio terminals that operate on the same frequency in very dense configurations, virtually eliminating the probability of interference. © 2011, HCL Technologies. Reproduction Prohibited. This document is protected under Copyright by the Author, all rights reserved. 7 /The 60GHz Wireless Network