Book contents
- Frontmatter
- Contents
- Authorship by Chapter
- Foreword
- Preface
- Part I Introduction to 802.11
- Part II 802.11 Quality of Service
- Part III 802.11 Security
- Part IV High Throughput 802.11
- Part V 802.11 Mesh Networks
- Part VI 802.11/Cellular Interworking
- Part VII Coexistence
- Chapter 20 Coexistence of Unlicensed Wireless Networks
- Chapter 21 Coexistence of IEEE 802.11n and Bluetooth
- Part VIII 802.11 Network and Radio Resource Management
- Part IX 802.11 Range
- Part X 802.11 Hardware Design
- Part XI Wi-Fi Hotspots
- Part XII Wi-Fi Applications
- Part XIII Ultra WideBand (UWB)
- Part XIV Public Wireless Broadband
- Epilogue
- Index
Chapter 20 - Coexistence of Unlicensed Wireless Networks
from Part VII - Coexistence
Published online by Cambridge University Press: 10 December 2009
- Frontmatter
- Contents
- Authorship by Chapter
- Foreword
- Preface
- Part I Introduction to 802.11
- Part II 802.11 Quality of Service
- Part III 802.11 Security
- Part IV High Throughput 802.11
- Part V 802.11 Mesh Networks
- Part VI 802.11/Cellular Interworking
- Part VII Coexistence
- Chapter 20 Coexistence of Unlicensed Wireless Networks
- Chapter 21 Coexistence of IEEE 802.11n and Bluetooth
- Part VIII 802.11 Network and Radio Resource Management
- Part IX 802.11 Range
- Part X 802.11 Hardware Design
- Part XI Wi-Fi Hotspots
- Part XII Wi-Fi Applications
- Part XIII Ultra WideBand (UWB)
- Part XIV Public Wireless Broadband
- Epilogue
- Index
Summary
Introduction
There are a variety of unlicensed wireless networks that operate in shared frequency bands. Many of these networks are installed in portable and hand-held devices. Given that these devices are portable it is not uncommon for devices using one unlicensed network to be in close proximity to another device using another unlicensed wireless network. These unlicensed wireless networks may operate in the same frequency band and may even operate in the same channel within the band. This raises the issue of whether these two networks can coexist in the same location. This chapter describes this coexistence issue.
Section 20.2 gives an overview of the various unlicensed frequency bands in the United States. Many of these bands are also unlicensed bands in other countries. Section 20.3 is a short survey of some of the unlicensed wireless networks that share these frequency bands. Section 20.4 gives a short history of coexistence of unlicensed wireless networks. Section 20.5 illustrates how to evaluate coexistence of two unlicensed wireless networks. Section 20.6 describes several methods of improving coexistence. Sections 20.7 and 20.8 give example of evaluating coexistence of wireless networks, using two IEEE 802 standards as case studies. And finally Section 20.9 discusses the issue of dynamic spectrum access in which unlicensed wireless networks identify and use unused portions of licensed frequency bands.
Overview of Unlicensed Frequency Bands
Unlicensed wireless networks can operate in a variety of frequency bands.
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- Information
- Emerging Technologies in Wireless LANsTheory, Design, and Deployment, pp. 469 - 500Publisher: Cambridge University PressPrint publication year: 2007