WO2010057302A1 - Systems and etiquette for home gateways using white space - Google Patents

Systems and etiquette for home gateways using white space Download PDF

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Publication number
WO2010057302A1
WO2010057302A1 PCT/CA2009/001664 CA2009001664W WO2010057302A1 WO 2010057302 A1 WO2010057302 A1 WO 2010057302A1 CA 2009001664 W CA2009001664 W CA 2009001664W WO 2010057302 A1 WO2010057302 A1 WO 2010057302A1
Authority
WO
WIPO (PCT)
Prior art keywords
spectrum
channel
white space
devices
gateway
Prior art date
Application number
PCT/CA2009/001664
Other languages
English (en)
French (fr)
Inventor
Shiquan Wu
Jung Yee
Original Assignee
Wi-Lan, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wi-Lan, Inc. filed Critical Wi-Lan, Inc.
Priority to KR1020117009461A priority Critical patent/KR101498759B1/ko
Priority to CN200980142699.2A priority patent/CN102246483B/zh
Priority to EP09827082.0A priority patent/EP2351400B1/en
Priority to JP2011535848A priority patent/JP5670907B2/ja
Publication of WO2010057302A1 publication Critical patent/WO2010057302A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/2838—Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/283—Processing of data at an internetworking point of a home automation network
    • H04L12/2834—Switching of information between an external network and a home network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • This invention relates generally to distribution of data signals over white space, and more particularly to a system and method for using the white space freed within a specified TV market by conversion from analog to digital TV (DTV) systems in accordance with a defined etiquette.
  • DTV digital TV
  • DTV digital TV Digital
  • DTV has several advantages over analog TV.
  • DTV is more flexible and efficient than analog television; it enables special services such as multiplexing (more than one program on the same channel), electronic program guides and additional languages, spoken or subtitled.
  • Another significant advantage of the DTV is that the digital channels take up less bandwidth and provide a better performance. This means that digital broadcasters can provide high definition (HDTV) services, with higher-quality images and sound. The sale of non-television services may also provide an additional revenue source.
  • HDTV high definition
  • the invention provides a system for redistributing data signals to wireless enabled devices located within a specified area, comprising: a spectrum detector for identifying a white space channel including one or more pieces of spectrum that are not currently used in the specified area; a data distribution unit adapted to receive, process and distribute to devices it serves, information signals received from a variety of sources over the white space channel; and a control channel processor configured to provide a shared signalling channel to enable signalling between the wireless enabled device and the data distribution unit.
  • an aspect of the invention is directed to a method for redistributing data signals to wireless enabled devices located within a specified area served by a gateway, comprising: a) on receipt of service requests from one or more devices, identifying a corresponding number of white space channels within the spectrum that is not currently used in the specified area; b) reserving the white space allocated to the white space channels identified in the specified area; c) broadcasting a white space allocation message for advertising to all neighbouring gateways the current channel allocation in the specified area; and d) distributing the information signals over the white space channels to the respective devices.
  • the invention provides an efficient way of identifying pieces of white space in a specified area and using this white space for delivering secondary services to subscribers present in that area.
  • Another advantage of the method and systems of the invention is that it allows for a simpler, cost effective design of white space devices. This invention also provides a practical way for cognitive white space device implementation.
  • Figure 1A shows the ATSC broadcast band
  • Figure 5C illustrates an example of how pieces of white space can be identified using bin indexing, according to an embodiment of the invention
  • channels 2, 3, and 4 will be reserved for some specific applications, after this reservation, the commercial ATSC TV channels will encompass 274 MHz, ranging from 76 MHz to 698 MHz, as shown on Figure 1 B by bands T2-T5.
  • Data distribution unit 1 receives the user signals from various sources and transmits these to the devices 9 over the white space identified by the spectrum detector 2; antenna unit 13 is used for transmitting the data to the devices.
  • parameters of the information signal transmitted by the unit 1 are designed so as to not interfere with the primary services present in the respective area.
  • the power of the information signal is very low, the carrier frequency and the band of the signals are selected in parts of the spectrum that are not currently used by other services, and the transmission is synchronized to the ATSC broadcast spectrum.
  • the white space channel is made of one piece of spectrum only.
  • the dynamic and adaptive attributes of the wireless spectrum allocation method and system of embodiments of the invention make them quite different from conventional wireless spectrum allocation schemes.
  • conventional wireless communications RF channels are usually pre-designed in that the transmission channels are allocated either in frequency in (FDMA systems), in time (TDMA systems), both in frequency and time (OFDMA), or in codes (CDMA systems).
  • wireless devices use a piece of spectrum and release it when communication is completed, so that spectrum utilization is not ideal when the allocation is pre-designed, as some pieces of spectrum may be idle during some periods of times, while some devices cannot gain access to this idle spectrum.
  • the bandwidth and waveforms need to be pre-designed so as to keep the channels well separated to reduce the interference.
  • the GSM systems which can accommodate simultaneously more than 8 calls within a 200 kHz channel, use a Gaussian-like waveform.
  • WCDMA systems have a 5 MHz channel bandwidth and a chip rate of 3.84 Mcps and use a radio resource controller (RRC) with a roll off factor 0.22
  • RRC radio resource controller
  • WiFi OFDM systems have a bandwidth 20 MHz and use rectangular pulses, etc.
  • the signalling channel 5 may be a TDD channel, shared by the devices that are on. Since the spectrum occupied by this channel is small, the shared signalling channel may be transmitted using a small portion of spectrum in TV channels 2, 3 or 4, or any 6 MHz TV channel that is not in use. Alternatively, the signalling channel 43 may be transmitted within the guard band between the ATSC channels, while maintaining the fixed relationship with the ATSC pilot 41.
  • the white space channel allocated to device 9 includes pieces of white space B1 , B2 and B3, distributor 7 uses only three of the four branches.
  • f1 is the carrier frequency in B1
  • f2 is the carrier frequency in B2
  • f3 is the carrier frequency in B3.
  • the baseband signal is de-multiplexed by processor 6 into three component signals s1 , s2 and s3 according to the available bandwidth B1, B2 and B3, and each component is transmitted along one of the branches.
  • Devices 9, shown generically in Figure 2 as a computer with an antenna 4', are equipped with a scanner that detects the shared signalling channel upon turn-on and look to it. As indicated above, use of the shared signalling channel enables the devices to receive control information from the control channel processor 3 and to transmit to the control channel processor 3 service requests and status information. Device 9 also receives the high rate data channel from the gateway, over the air interface established between the gateway antenna 13 and device's antenna 4'. No changes to the device tuner are needed when the data is transmitted in the TV spectrum and MPEG format.
  • gateway 10 receives a connection request from a device 9, as shown in step 65, it will identify and select a white space channel on which to broadcast to device 9, step 66.
  • the white space channels are allocated based on the available spectrum sensed in steps 61-63, and this operation takes into account the bandwidth necessary for the requested service (in the exemplary case of an ATSC channel, the bandwidth necessary is 6 MHz, and can be available as a single piece or made from a plurality of white space pieces).
  • the gateway informs device 9 of the parameters of this channel over the signalling channel, step 67. In this way, the devices are informed of the frequency, start time, current bandwidth allocation, duration etc.
  • This information is preferably in the form of bit maps, and enables the gateway and devices to transmit starting from the designated time and frequency grids, rather than arbitrarily.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Automation & Control Theory (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
PCT/CA2009/001664 2008-11-19 2009-11-18 Systems and etiquette for home gateways using white space WO2010057302A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020117009461A KR101498759B1 (ko) 2008-11-19 2009-11-18 화이트 스페이스를 사용하는 홈 게이트웨이를 위한 시스템 및 에티켓
CN200980142699.2A CN102246483B (zh) 2008-11-19 2009-11-18 使用白色空间的对家用网关的系统和方法
EP09827082.0A EP2351400B1 (en) 2008-11-19 2009-11-18 Systems and etiquette for home gateways using white space
JP2011535848A JP5670907B2 (ja) 2008-11-19 2009-11-18 ホワイトスペースを使用したホームゲートウェイのためのシステムおよびエチケット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/274,141 US8107391B2 (en) 2008-11-19 2008-11-19 Systems and etiquette for home gateways using white space
US12/274,141 2008-11-19

Publications (1)

Publication Number Publication Date
WO2010057302A1 true WO2010057302A1 (en) 2010-05-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2009/001664 WO2010057302A1 (en) 2008-11-19 2009-11-18 Systems and etiquette for home gateways using white space

Country Status (7)

Country Link
US (2) US8107391B2 (ja)
EP (1) EP2351400B1 (ja)
JP (1) JP5670907B2 (ja)
KR (1) KR101498759B1 (ja)
CN (1) CN102246483B (ja)
TW (1) TW201043060A (ja)
WO (1) WO2010057302A1 (ja)

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KR20110089262A (ko) 2011-08-05
US8995292B2 (en) 2015-03-31
KR101498759B1 (ko) 2015-03-04
EP2351400A4 (en) 2014-01-15
JP2012509608A (ja) 2012-04-19
JP5670907B2 (ja) 2015-02-18
EP2351400B1 (en) 2020-01-15
US20100124254A1 (en) 2010-05-20
TW201043060A (en) 2010-12-01
CN102246483A (zh) 2011-11-16
US20120096498A1 (en) 2012-04-19
EP2351400A1 (en) 2011-08-03
CN102246483B (zh) 2014-03-26
US8107391B2 (en) 2012-01-31

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