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WO2013166867A1 - Procédé et dispositif d'étalement de spectre de fréquence d'un réseau local sans fil - Google Patents

Procédé et dispositif d'étalement de spectre de fréquence d'un réseau local sans fil Download PDF

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Publication number
WO2013166867A1
WO2013166867A1 PCT/CN2013/070972 CN2013070972W WO2013166867A1 WO 2013166867 A1 WO2013166867 A1 WO 2013166867A1 CN 2013070972 W CN2013070972 W CN 2013070972W WO 2013166867 A1 WO2013166867 A1 WO 2013166867A1
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WO
WIPO (PCT)
Prior art keywords
channel
bandwidth
22mhz
frequency band
center frequency
Prior art date
Application number
PCT/CN2013/070972
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English (en)
Chinese (zh)
Inventor
朱新林
张明
韩喆
林建森
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2013166867A1 publication Critical patent/WO2013166867A1/fr

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Classifications

    • 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
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a frequency extension method and device for a wireless local area network. Background technique
  • a Wireless Local Area Network provides a high-speed data connection within a certain range.
  • the channel division of WLAN in the 2.4 GHz band in China is as follows:
  • the operating frequency range is 2400 2483.5 MHz, which is an industrial scientific medical (ISM) band that is not required to be applied; divided into 13 channels, each channel can occupy bandwidth 22MHz. However, only three of the 13 channels do not interfere with each other, such as channel 1, channel 6, and channel 11. Summary of the invention
  • Embodiments of the present invention provide a spectrum expansion method and device for a wireless local area network, which are used to expand
  • An embodiment of the present invention provides a frequency extension method for a wireless local area network, including:
  • Determining the frequency band used by the WLAN which is in the 2.4G band or includes the 2.4G band and the commercial band;
  • the frequency band is a 2.4G frequency band
  • at least four channels that do not interfere with each other are selected, or when the frequency band is a 2.4G frequency band and a commercial frequency band, at least one channel that does not interfere with each other is selected;
  • the selected channel is determined as a WLAN channel providing WLAN service.
  • An embodiment of the present invention provides a frequency extension device for a wireless local area network, including:
  • a determining module configured to determine a frequency band used by the WLAN, wherein the frequency band is a 2.4G frequency band or a packet Including the 2.4G frequency band and the commercial frequency band;
  • a selection module configured to select at least four channels that do not interfere with each other when the frequency band is a 2.4G frequency band, or select at least one channel that does not interfere with each other when the frequency band is a 2.4G frequency band and a commercial frequency band ;
  • the method for selecting a channel in the embodiment of the present invention can enable the channel information of the WLAN to support at least four WLAN channels that do not interfere with each other in the 2.4 GHz band, or to enable the used frequency band.
  • the WLAN channel can support non-interference, and the number of channels that do not interfere with each other can be increased in the existing 2.4 GHz band.
  • the WLAN channel can be set in the commercial frequency band to improve the spectrum range of the WLAN technology application.
  • FIG. 3 is a schematic diagram of a power spectrum of a channel corresponding to FIG. 2;
  • FIG. 4 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another embodiment of a channel configuration according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a frequency local extension device of a wireless local area network according to the present invention.
  • 1 is a schematic flowchart of an embodiment of a method for extending a frequency of a wireless local area network according to an embodiment of the present invention, including: Step 11: A device in a WLAN determines a frequency band used by a WLAN, and the frequency band is a 2.4G frequency band or includes a 2.4G frequency band. And commercial frequency bands;
  • Step 12 When the frequency band is 2.4G frequency band, the device in the WLAN selects at least four channels that do not interfere with each other, or when the frequency band is 2.4G frequency band and the commercial frequency band, select at least one mutual interference.
  • Channel
  • Step 13 The device in the WLAN determines the selected channel as the WLAN channel providing the WLAN service.
  • the device in the WLAN may be an Access Point (AP) or an Access Controller (AC), a WLAN terminal, or any device using WLAN technology.
  • AP Access Point
  • AC Access Controller
  • Method 1 In the 2.4GHz band (that is, 2400MHz ⁇ 2500MHz), configure at least 4 channels that do not interfere with each other.
  • the method increases the number of configurable channels that do not interfere with each other with respect to the existing WLAN standard configuration (the prior art is three mutually non-interfering channels), the working spectrum of the WLAN system can be extended, and the working frequency range is unchanged (When using 2400MHz ⁇ 2500MHz), improve the efficiency of frequency speech.
  • a channel with a bandwidth of 22 MHz (which may be referred to as channel 14) is added at a frequency of 2484 MHz, and does not interfere with the existing channels 1, 6, and 11.
  • the existing WLAN has a working range of 2400MHz ⁇ 2483.5MHz in the 2.4G frequency band.
  • WLAN devices not only WLAN devices can be used, but other non-WLAN devices, such as Bluetooth devices, cordless phones, Zigbee, remote control devices, video surveillance, etc. It can also be used, then these non-WLAN devices can cause out-of-system interference to WLAN devices.
  • the application range of the WLAN device is extended, and the interference caused by the non-WLAN device to the WLAN device can be reduced.
  • Manner 2 The four channels obtained by mode 1 are frequency-shifted, and the spacing between the four channels is kept constant during the frequency shift, and the frequency shift range is 2300 MHz to 2600 MHz.
  • Manner 3 Mirroring the obtained four channels of mode one, frequency shifting the four channels after mirroring, maintaining the spacing between the four channels during the frequency shift, and the frequency shift range is from 2300 MHz to 2600 MHz.
  • Mode 2 and Mode 3 belong to the commercially available frequency band in the 2.4 GHz band and adjacent to it, and at least 4 channels that do not interfere with each other are configured. Mode 2 and Mode 3 are also in the same range of the working frequency range.
  • the number of mutually configurable channels that do not interfere with each other is increased, the operating frequency of the system can be extended, and the spectrum utilization efficiency is improved under the premise that the working frequency range is constant; in addition, since the 2.4 GHz band is free, channel planning The lack of regulation will adversely affect the stability of the WLAN, while the second and third modes can use the commercial frequency band adjacent to it, which can improve the stability to some extent.
  • Method 4 Configure channels that do not interfere with each other in the commercial frequency band.
  • the number of mutually non-interfering channels configured in the used frequency band may be at least one. Configuring the WLAN channel in the frequency band can also expand the working spectrum of the WLAN to mitigate interference in the WLAN system. In addition, since the commercial frequency band can be effectively managed by the operator, the WLAN channel can be planned in the commercial frequency band. A non-interfering, stable WLAN commercial network.
  • the spectrum range actually supported by the WLAN in the 2.4 GHz band is 2400 ⁇ to 2497 ⁇ , which means that the actual supported bandwidth of 2.4 GHz is 97 MHz.
  • the channel frequency plan of the WLAN in the 2.4 GHz band is as follows:
  • the band can include 14 channels, and the center frequency of each channel is: 2412MHz, 2417MHz, 2422MHz, 2427MHz, 2432MHz, 2437MHz, 2442MHz, 2447MHz , 2452MHz, 2457MHz, 2462MHz, 2467MHz, 2472MHz and 2484MHz.
  • the WLAN 22MHz channel power spectral density template indicates that if the adjacent two channels do not interfere with each other, the out-of-channel interference of the required channel is less than or equal to -20dB in the passband interval of the channel -11 ⁇ 11MHz.
  • the channels that do not interfere with each other are channel 1, channel 6 and channel 11 respectively; the center frequency of channel 1 is 2412 MHz, the frequency range is 2401 MHz ⁇ 2423 MHz; the center frequency of channel 6 is 2437 MHz, and the spectrum range is 2426 MHz ⁇ 2448 MHz.
  • the center frequency of channel 11 is 2462MHz, and the spectrum range is 2451 MHz ⁇ 2473MHz.
  • the newly added channel in this embodiment is channel 14, the center frequency of channel 14 is 2484 MHz, and the spectrum range is 2473 MHz to 2495 MHz. Since the maximum frequency of the channel 14 is 2495 MHz, it does not exceed the prior art 2497 MHz range; the center frequency of the channel 14 is 2484MHz, in line with the prior art plan for channel frequency.
  • the interference situation of the four channels (channel 1, channel 6, channel 11, and channel 14) in this embodiment indicates that: the out-of-channel interference of any one of the above four channels is less than or equal to - 20dB, that is, the above four channels are channels that do not interfere with each other.
  • the channel 1, the channel 6, the channel 11, and the channel 14 configured in this embodiment comply with the channel planning conditions and are also mutually non-interfering conditions, and are four mutually non-interfering channels that can be simultaneously supported.
  • the center frequency spacing structure of the channel 1, the channel 6, the channel 11, and the channel 14 is kept unchanged to the right by 25 MHz, and the moved channel, that is, the four channels configured in this embodiment are respectively:
  • Channel ⁇ The center frequency is 2437MHz and the bandwidth is 22MHz (that is , the frequency range is 2426 ⁇ 2448MHz ) ;
  • the center frequency is 2462MHz and the bandwidth is 22MHz (that is, the frequency range is 2451 - 2473MHz);
  • Channel 1 ⁇ The center frequency is 2487MHz and the bandwidth is 22MHz (that is, the frequency range is
  • Channel 14 ' The center frequency is 2509MHz and the bandwidth is 22MHz (that is, the frequency range is 2498 ⁇ 2520MHz).
  • Fig. 4 is only an example, and other distances and/or directions can be moved in the range of 2300 ⁇ 2600MHz.
  • the center frequency spacing structure of channel 1, channel 6, channel 11, and channel 14 is kept unchanged for mirror mapping, and the four channel center frequency spacing structures after mirror mapping are kept unchanged to the left.
  • the mobile channel that is, the four channels configured in this embodiment are:
  • Channel 1 " The center frequency is 2459MHz and the bandwidth is 22MHz (that is , the frequency range is 2448 ⁇ 2470MHz ) ;
  • Channel 6 " The center frequency is 2434MHz and the bandwidth is 22MHz (that is , the frequency range is 2423 ⁇ 2445MHz ) ;
  • Channel 11 " The center frequency is 2409MHz and the bandwidth is 22MHz (that is, the frequency range is 2398 ⁇ 2420MHz) ;
  • Channel 14" The center frequency is 2387MHz and the bandwidth is 22MHz (that is, the frequency range is 2376 ⁇ 2398MHz).
  • movement mode shown in FIG. 5 is only an example, and other movement modes may exist in the range of 2300 to 2600 MHz.
  • the minimum spacing of the center frequency of the adjacent channel is f mm , and the bandwidth of the channel is B.
  • f mm >B is required.
  • the channel bandwidth B is 22 MHz
  • the center frequency point spacing is 25 MHz.
  • the configuration in the commercial band of 2300 ⁇ 2400MHz is taken as an example.
  • the four channels that do not interfere with each other are:
  • Channel A The center frequency is 2312MHz, and the bandwidth is 22MHz (that is, the frequency range is: 2301 ⁇ 2323MHz);
  • Channel B The center frequency is 2337MHz and the bandwidth is 22MHz (that is, the frequency range is: 2326 ⁇ 2348MHz)
  • Channel C The center frequency is 2362MHz and the bandwidth is 22MHz (that is, the frequency range is: 2351 ⁇ 2373MHz)
  • Channel D The center frequency is 2387MHz and the bandwidth is 22MHz (that is, the spectrum range is: 2376 ⁇ 2398MHz)
  • the configuration in the commercial frequency band of 2500 ⁇ 2600MHz is taken as an example.
  • the four channels that do not interfere with each other are:
  • Channel E The center frequency is 2512MHz, and the bandwidth is 22MHz (that is, the spectrum range is: 2501 ⁇ 2523MHz);
  • Channel F The center frequency is 2537MHz and the bandwidth is 22MHz (that is, the frequency range is: 2526 ⁇ 2548MHz)
  • Channel G The center frequency is 2562MHz and the bandwidth is 22MHz (that is, the frequency range is: 2551 ⁇ 2573MHz)
  • Channel H The center frequency is 2587MHz and the bandwidth is 22MHz (that is, the frequency range is: 2576 ⁇ 2598MHz).
  • FIG. 8 is a schematic structural diagram of an embodiment of a frequency local extension device of a wireless local area network according to the present invention.
  • the device can be an AP, an AC, a WLAN terminal, or any device that uses the WLAN technology, and the device includes a determining module 81, a selecting module 82, and a configuration module 83.
  • the determining module 81 is configured to determine a frequency band used by the WLAN, where the frequency band is The 2.4G frequency band includes the 2.4G frequency band and the commercial frequency band; the selection module 82 is configured to select at least four channels that do not interfere with each other when the frequency band is the 2.4G frequency band, or when the frequency band is the 2.4G frequency band and In the commercial frequency band, at least one channel that does not interfere with each other is selected; the configuration module 83 is configured to determine the selected channel as a WLAN channel providing WLAN service.
  • the selecting module is specifically configured to:
  • At least 4 channels are selected, wherein the interval between the center frequencies of any two adjacent channels is at least the bandwidth of the channel.
  • the selecting module is specifically configured to:
  • the selecting module is specifically configured to:
  • WLAN channel where channel 1 refers to a channel with a center frequency of 2412 MHz and a bandwidth of 22 MHz, channel 6 refers to a channel with a center frequency of 2437 MHz and a bandwidth of 22 MHz, and channel 11 refers to a center frequency of 2462 MHz.
  • channel 14 refers to a channel with a center frequency of 2484 MHz and a bandwidth of 22 MHz.
  • the selecting module is specifically configured to:
  • Channel ⁇ , channel 6 ′, channel 1 ⁇ and channel 14 ′ are selected as four mutually non-interfering WLAN channels supported simultaneously, where channel ⁇ , channel 6 ′, channel 1 ⁇ and channel 14 ′ are channel 1 and channel 6 , channel 11, channel 14 in the range of 2300MHz and 2600MHz, keeping the center frequency spacing structure unchanged, and shifting any bandwidth to the left or right; or
  • Channel 1", channel 6", channel 11” and channel 14" are selected as four mutually non-interfering WLAN channels supported simultaneously, where channel 1", channel 6", channel 11" and channel 14" are channel 1.
  • the four channels after the mirroring are in the range of 2300 MHz and 2600 MHz, and the center frequency spacing structure is kept unchanged, and the bandwidth is shifted to the left or right by an arbitrary bandwidth;
  • Channel 1 refers to a channel with a center frequency of 2412 MHz and a bandwidth of 22 MHz.
  • Channel 6 It refers to a channel with a center frequency of 2437MHz and a bandwidth of 22MHz.
  • Channel 11 refers to a channel with a center frequency of 2462MHz and a bandwidth of 22MHz.
  • Channel 14 refers to a channel with a center frequency of 2484MHz and a bandwidth of 22MHz.
  • the selecting module is specifically configured to:
  • the selecting module is specifically configured to select four channels as follows:
  • the center frequency is 2312MHz, the channel with a bandwidth of 22MHz, the center frequency is 2337MHz, the channel with a bandwidth of 22MHz, the center frequency is 262MHz, the channel with a bandwidth of 22MHz, and the center frequency is 2387MHz, the bandwidth Is a 22MHz channel; or,
  • the center frequency is 2512MHz, the bandwidth is 22MHz, the center frequency is 2537MHz, the bandwidth is 22MHz, the center frequency is 2562MHz, the bandwidth is 22MHz, and the center frequency is 2587MHz.
  • the bandwidth is 22MHz channel.
  • the spectrum range of the WLAN technology application can be improved, and the frequency utilization rate can be improved under the premise that the working frequency range is constant.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un dispositif d'étalement de spectre de fréquence d'un réseau local sans fil (WLAN pour Wireless Local Area Network). Le procédé consiste à : déterminer une bande de fréquences utilisée par un réseau WLAN, la bande de fréquences étant une bande de fréquences de 2,4 G ou comprenant une bande de fréquences de 2,4 G et une bande de fréquences commerciale ; lorsque la bande de fréquences est la bande de fréquences de 2,4 G, sélectionner au moins quatre canaux qui n'interfèrent pas les uns avec les autres ou, lorsque la bande de fréquences comprend la bande de fréquences de 2,4 G et la bande de fréquences commerciale, sélectionner au moins un canal qui n'interfère pas avec les autres ; et déterminer le canal sélectionné comme étant un canal de réseau WLAN destiné à offrir des services de réseau WLAN. Selon des modes de réalisation de la présente invention, davantage de canaux de réseau WLAN qui n'interfèrent pas les uns avec les autres peuvent être supportés en même temps.
PCT/CN2013/070972 2012-05-08 2013-01-25 Procédé et dispositif d'étalement de spectre de fréquence d'un réseau local sans fil WO2013166867A1 (fr)

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CN201210139598.3 2012-05-08
CN201210139598.3A CN102655686B (zh) 2012-05-08 2012-05-08 无线局域网的频谱扩展方法和设备

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Publication number Priority date Publication date Assignee Title
CN102655686B (zh) * 2012-05-08 2015-01-07 华为技术有限公司 无线局域网的频谱扩展方法和设备
CN104936212A (zh) * 2015-04-29 2015-09-23 无锡市崇安区科技创业服务中心 一种无线路由器无线信号频段智能切换控制方法

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US20080192644A1 (en) * 2007-02-08 2008-08-14 Yoriko Utsunomiya Radio communication apparatus and radio communication method
CN101340209A (zh) * 2008-08-01 2009-01-07 重庆邮电大学 工业无线网络中跳信道抗射频干扰方法
CN101448291A (zh) * 2008-12-29 2009-06-03 中兴智能交通系统（北京）有限公司 一种实现无线局域网漫游切换的方法、终端和系统
CN102655686A (zh) * 2012-05-08 2012-09-05 华为技术有限公司 无线局域网的频谱扩展方法和设备

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CN101154991B (zh) * 2006-09-29 2011-09-21 中兴通讯股份有限公司 频谱使用方法和装置
CN201904781U (zh) * 2010-07-05 2011-07-20 深圳市华讯方舟科技有限公司 可同时提供多个互不干扰的频道的WiFi基站天线系统

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Publication number Priority date Publication date Assignee Title
US20080192644A1 (en) * 2007-02-08 2008-08-14 Yoriko Utsunomiya Radio communication apparatus and radio communication method
CN101340209A (zh) * 2008-08-01 2009-01-07 重庆邮电大学 工业无线网络中跳信道抗射频干扰方法
CN101448291A (zh) * 2008-12-29 2009-06-03 中兴智能交通系统（北京）有限公司 一种实现无线局域网漫游切换的方法、终端和系统
CN102655686A (zh) * 2012-05-08 2012-09-05 华为技术有限公司 无线局域网的频谱扩展方法和设备

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