WO2012055274A1 - 信道调整方法及装置 - Google Patents

信道调整方法及装置 Download PDF

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Publication number
WO2012055274A1
WO2012055274A1 PCT/CN2011/077611 CN2011077611W WO2012055274A1 WO 2012055274 A1 WO2012055274 A1 WO 2012055274A1 CN 2011077611 W CN2011077611 W CN 2011077611W WO 2012055274 A1 WO2012055274 A1 WO 2012055274A1
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Prior art keywords
channel
working channel
working
adjusting
adjustment
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PCT/CN2011/077611
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English (en)
French (fr)
Inventor
李楠
吕开颖
孙波
李峰
姜静
田开波
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012055274A1 publication Critical patent/WO2012055274A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • the present invention relates to a channel adjustment technique in a related network element in a wireless local area network, and more particularly to a channel adjustment method and apparatus for an 802.11 device in the presence of interference on a current working channel.
  • the IEEE 802.il working group of the Institute of Electrical and Electronics Engineers has defined a series of WLAN technology standards such as 802.11a, 802.11b, 802.11g, etc., followed by other task groups, which are dedicated to the development of specifications related to the existing 802.11 technology improvements.
  • the 802.11n task group proposes high throughput (HT) requirements to support data rates up to 600 Mbps.
  • HT high throughput
  • the 802.1 lac task group further proposed the concept of VHT ( Very High throughput), which increases the data rate to lGbps.
  • VHT Very High throughput
  • an access point AP, Access Point
  • a plurality of non-access stations STA, Station
  • BSS basic service set
  • 802.11 defines two modes of operation: Distributed Coordination Function (DCF) and Point Coordination Function (PCF), and an improved mode for these two modes of operation: Enhanced Distributed Coordination Access (EDCA, Enhanced Distributed Channel Access) and Hybrid Coordination Function Control Channel Access Function
  • DCF Distributed Coordination Function
  • PCF Point Coordination Function
  • EDCA Enhanced Distributed Coordination Access
  • EDCA Enhanced Distributed Coordination Access
  • the large bandwidth consists of a non-overlapping 20 MHz channel.
  • the 160 MHz channel consists of two 80 MHz channels adjacent or not adjacent, each The 80 MHz channel consists of two adjacent 40 MHz channels, each consisting of two adjacent 20 MHz channels.
  • Figure 1 is a schematic diagram showing the composition of different channel bandwidths of a large bandwidth system. As shown in Figure 1, there are two channelization methods in the 5.725GHz to 5.850GHz frequency band: when the center frequency is from 5.745GHz, the bandwidth is 20MHz per channel.
  • FIG. 2 is a schematic diagram of a channel set formed by different channelization methods in the 5.725 GHz to 5.850 GHz band. The two channelization modes are as shown in FIG. 2 .
  • the channel formed by the previous channelization method is referred to as a first channel set
  • the channel formed by the latter channelization method is referred to as a second channel set.
  • FIG. 3 it is a schematic diagram of the OBSS structure. Where access point A and access point B form OBSS, they are in A and B. Sites C, D, and E in the overlap region are likely to use identical channels to create potential interference with each other.
  • the 802.11n device works on the first channel set, and the possible working bandwidth is 20/40 MHz.
  • the 802.11ac device works on the first channel set, and the possible working bandwidth is 20/40/80 MHz, or works in the first.
  • the possible working bandwidth is 20/40/80/120 MHz.
  • the collision probability increases when the AP and the STA use a large bandwidth for transmission, resulting in a decrease in the transmission efficiency of the large bandwidth. Therefore, how to perform channel adjustment in the case of OBSS to perform efficient data transmission and improve the average effective bandwidth of the system is an urgent problem to be solved in the new generation 802.11 protocol. Summary of the invention
  • the main object of the present invention is to provide a channel adjustment method and apparatus, which can adjust the working channel of the device when the 802.11 device is interfered, thereby avoiding or reducing interference between devices and improving transmission reliability.
  • a channel adjustment method includes:
  • the current working channel is adjusted by scanning and/or detecting channels in more than one channel set, or determining whether the current working channel is interfered according to the received channel scan result and/or the detection result.
  • the determining that the current working channel is interfered by is specifically:
  • the access station determines, according to its own detection of the channel or the detection of the non-access site associated with it, that the interference related parameter received by the current working channel exceeds or does not reach the set threshold;
  • the access station determines that there is channel interference according to the scan result of the channel itself or the channel scan result reported by the non-access station associated with it.
  • the working channel is adjusted to:
  • the working channel bandwidth is adjusted to: increase or decrease the bandwidth of the working channel; and/or adjust the position of the working channel to: adjust the working channel to other channels in the current channel set;
  • the primary channel of the working channel is adjusted to be the same channel as the primary channel of at least one of the other BSSs.
  • the access station sends a signaling to the non-access site associated with it, and the signaling includes at least one of the following parameters: the adjustment result, the adjustment effective time information.
  • the signaling includes at least one of the following: a beacon frame, a probe response frame, and a channel adjustment notification frame.
  • the non-access station adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result; or, the non-access station adjusts to the determined that the access station has been working on the new working channel according to the adjustment result. Work on the new working channel.
  • the determining that the access station has worked on the new working channel is: receiving a frame sent by the access station on the new working channel, or determining that the access station is already on the new working channel after waiting for a reasonable conversion time jobs.
  • a channel adjusting device includes a scanning and detecting unit, a determining unit and an adjusting unit, wherein
  • a scanning and detecting unit for scanning and/or detecting channels in more than one channel set
  • a determining unit configured to trigger an adjusting unit when the current working channel is interfered according to the scanning and/or detecting result of the scanning and detecting unit
  • An adjustment unit for adjusting the working channel is an adjustment unit for adjusting the working channel.
  • the determining unit further determines, according to the detection result of the channel, that the current working channel is interfered when the interference related parameter received by the current working channel exceeds or does not reach the set threshold;
  • the adjusting unit specifically adjusts at least one of the following: a bandwidth of the working channel, a location of the working channel, a channel set to which the working channel belongs, and a primary channel of the working channel.
  • the adjusting unit further adjusts the working channel bandwidth to: increase or decrease the bandwidth of the working channel; And/or, adjusting the location of the working channel to: adjust the working channel to other channels in the current channel set;
  • adjusting the primary channel of the working channel to: adjust the primary channel of the current BSS to be the same channel as the primary channel of at least one of the other BSSs.
  • the device further includes:
  • a sending unit configured to send signaling to the non-access station associated with the access station, where the signaling includes at least one of the following parameters: adjusting the result, adjusting the effective time information; the signaling includes at least one of the following: Beacon frame, probe response frame, channel adjustment notification frame.
  • the adjusting unit further,
  • the non-access station is adjusted to work on the new working channel when the adjustment effective time arrives;
  • the non-access station is adjusted to work on the new working channel; wherein, the new working channel receives the frame sent by the access station. , or after waiting for a reasonable conversion time, determine that the access site is working on the new working channel.
  • a channel adjustment apparatus comprising: a receiving unit, a determining unit, and an adjusting unit, wherein the receiving unit is configured to receive a channel scan result and/or a detection result sent by the non-access station associated with the channel adjusting apparatus;
  • a determining unit configured to trigger an adjustment unit when determining that the current working channel is interfered according to the scanning and/or detection result
  • An adjustment unit for adjusting the working channel is an adjustment unit for adjusting the working channel.
  • the determining unit further determines that the current working channel is interfered when the interference related parameter received by the current working channel exceeds or does not reach the set threshold; or The determining unit further determines that the current working channel is interfered according to the scanning result of the channel.
  • the adjusting unit specifically adjusts at least one of the following: a bandwidth of the working channel, a location of the working channel, a channel set to which the working channel belongs, and a primary channel of the working channel.
  • the adjusting unit further adjusts the working channel bandwidth to: increase or decrease the bandwidth of the working channel;
  • adjusting the location of the working channel is specifically: adjusting the working channel to other channels in the current channel set;
  • adjusting the channel set to which the working channel belongs is specifically: replacing the working channel with the channel of the other channel set;
  • adjusting the primary channel of the working channel is specifically: adjusting the primary channel of the current BSS to be the same channel as the primary channel of at least one BSS of the other BSSs.
  • the device further includes:
  • a sending unit configured to send signaling to the non-access station associated with the access station, where the signaling includes at least one of the following parameters: adjusting the result, adjusting the effective time information; the signaling includes at least one of the following: Beacon frame, probe response frame, channel adjustment notification frame.
  • the adjusting unit further,
  • the non-access station is adjusted to work on the new working channel when the adjustment effective time arrives;
  • the non-access station is adjusted to work on the new working channel; wherein, the new working channel receives the frame sent by the access station. , or after waiting for a reasonable conversion time, determine that the access site is working on the new working channel.
  • an 802.11 device when an 802.11 device scans or detects that its working channel is interfered by the channel of another 802.11 device, it will adjust its own working channel, which may be a working channel.
  • the bandwidth, the location of the working channel, the channel set to which the working channel belongs, or any one or more of the primary channels of the working channel are adjusted to avoid interference of their working channels, thereby reducing mutual interaction between 802.11 devices. Interference, improve the transmission rate of network data, and ensure the reliability of data transmission.
  • Figure 1 is a schematic diagram showing the composition of different channel bandwidths of a large bandwidth system
  • FIG. 2 is a schematic diagram of a channel set formed by different channelization methods in the 5.725 GHz to 5.850 GHz band;
  • Figure 3 is a schematic diagram of the OBSS structure
  • FIG. 4 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 5 of the present invention.
  • FIG. 9 is a schematic structural diagram of a channel adjustment apparatus according to the present invention.
  • FIG. 10 is a schematic diagram showing another composition structure of a channel adjusting apparatus according to the present invention. detailed description
  • the basic idea of the present invention is that when an 802.11 device scans or detects that its working channel is interfered by the channel of other 802.11 devices, it will adjust its working channel. It is to adjust the bandwidth of the working channel, the location of the working channel, the channel set to which the working channel belongs, or any one or more of the main channels of the working channel to avoid interference of its working channel.
  • 802.11 devices need to have channel adjustment function, that is, when determining that their working channels are interfered by other channels, adjust their working channels and use the current uninterrupted
  • the channel acts as a working channel.
  • there are many ways to determine whether a channel is interfered such as by detecting a channel signal to noise ratio, or a channel quality indicator (CQI, Channel Quality Indicator), or a channel clean decision (CCA, Clear Channel Assessment). Whether the current working channel is disturbed.
  • CQI Channel Quality Indicator
  • CCA Clear Channel Assessment
  • the AP scans the channel, or scans the result of the STA associated with the AP, and reports the scan result to the AP.
  • the scan result indicates whether there is overlap with the working channels of other BSSs, and the current working channel is determined to be interfered.
  • the scanning and detecting mode of the channel interference is not the focus of the present invention, and is not a difficulty in implementing the technical solution of the present invention.
  • the specific manner of determining the interference of the working channel is not repeated here, and the existing channel interference detecting mode can be used.
  • the 802.11 device performs the purpose of adjusting the working channel, and needs to ensure the current data transmission rate under the premise of ensuring the reliability of the data transmission. Therefore, when the working channel is adjusted in the specific implementation process, the adjustment work is ensured as much as possible.
  • the bandwidth behind the channel will only reduce the bandwidth of the current working channel when there are fewer channels currently undisturbed.
  • the primary channel of the current BSS is adjusted to be the primary channel of at least one of the other BSSs existing on the adjusted channel. The same channel. If no other BSS works on the adjusted channel, one channel can be arbitrarily selected as the primary channel.
  • the access station may send a signaling to the non-access site associated with it, and the signaling includes at least one of the following parameters: the adjustment result, and the adjustment effective time information.
  • the signaling includes at least one of the following: a beacon frame, a probe response frame (Probe Response), and a channel adjustment notification frame.
  • the non-access station adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result; or, the non-access station adjusts to the determined that the access station has been working on the new working channel according to the adjustment result. Work on the new working channel.
  • the determining that the access station has worked on the new working channel is: receiving a frame sent by the access station on the new working channel, or determining that the access station is already on the new working channel after waiting for a reasonable conversion time jobs.
  • FIG. 4 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 1 of the present invention. As shown in FIG. 4, this embodiment describes an 802.11n device or an 802.11ac device working in a first channel set. When an 802.11ac device operating in the second channel set generates interference, an adjustment method is performed on the 802.11ac device operating in the second channel set. The adjustments implemented in this example are adjustments made within the second set of channels.
  • An 802.11n device operates on channel 11 of the first channel set with a 20 MHz bandwidth, and another 802.11ac device operates on channel 21 and channel 22 of the second channel set with a 40 MHz bandwidth, where channel 21 is the primary channel.
  • the 802.11ac device performs channel detection and finds that the two channels currently working are interfered. When the interference related parameters exceed or fail to reach the predetermined interference threshold, the 802.11ac device initiates the working channel adjustment. Alternatively, the 802.11ac device performs channel scanning and initiates a working channel adjustment based on the scan result.
  • the device can be adjusted in one of the following ways:
  • Adjust the working channel position Adjust the working channel to channel 23 and channel 24, or letter Channel 25 and channel 26 have the same operating bandwidth and are still 40 MHz.
  • Adjust channel position and channel bandwidth adjust the working channel to channel 23, channel 24, channel 25 and channel 26 to work in 80 MHz bandwidth; or adjust to one of channel 23, channel 24, channel 25 and channel 26. , work in 20MHz bandwidth.
  • the new primary channel should be the same as the primary channel of at least one BSS on the adjusted channel.
  • the access station After determining how to adjust, the access station sends a signaling to the non-access site associated with it, for example, sending a channel adjustment notification frame, which includes at least one of the following: adjusting the result and adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the adjustment effective time can be a frame count value, which is decremented according to a certain rule, and the adjustment takes effect when it is reduced to zero.
  • the non-access station adjusts to work on the new working channel after determining that the access station has been working on the new working channel according to the adjustment result.
  • the access station It is determined that the access station has worked on the new working channel as: Receive a frame transmitted by the access station on the new working channel, or after waiting for a reasonable transition time, determine that the access station is working on the new working channel.
  • the reasonable conversion time may be an empirical value of the time required for the channel to be converted by the pre-set site of the non-access site.
  • FIG. 5 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 2 of the present invention. As shown in FIG. 5, this embodiment describes an 802.11n device or an 802.11ac device pair working in a first channel set. When the 802.11ac device of the second channel set generates interference, the 802.11ac device operating in the second channel set performs a channel adjustment method. The adjustments implemented in this example are adjustments made within the second set of channels.
  • An 802.11n device operates on channel 11 and channel 12 of the first channel set with a 40 MHz bandwidth
  • another 802.11ac device operates at channel 21 of the second channel set with a 40 MHz bandwidth and On channel 22, channel 21 is the primary channel.
  • the 802.11ac device performs channel detection and finds that both channels currently working and channel 23 are interfered.
  • the 802.11ac device initiates the working channel adjustment.
  • the 802.11ac device channel scans and initiates a working channel adjustment based on the channel scan result.
  • the device can be adjusted in one of the following ways:
  • Adjust the working channel position Adjust the working channel to channel 24 and channel 25, or channel 25 and channel 26, the working bandwidth is unchanged, still 40MHz.
  • Adjust channel position and channel bandwidth Adjust the working channel to channel 24, channel 25 or channel 26 to work in 20MHz bandwidth.
  • the new primary channel should be the same as the primary channel of at least one BSS on the adjusted channel.
  • the access station After determining how to adjust, the access station sends a signaling to the non-access site associated with it, for example, sending a channel adjustment notification frame, which includes at least one of the following: adjusting the result and adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the non-access station adjusts to work on the new working channel after determining that the access station has been working on the new working channel according to the adjustment result. It is determined that the access station has worked on the new working channel as: Receive a frame transmitted by the access station on the new working channel, or after waiting for a reasonable transition time, determine that the access station is working on the new working channel.
  • a reasonable transition time may be a risk value for the time required for channel switching by a site preset by the non-access site.
  • FIG. 6 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 3 of the present invention. As shown in FIG. 6, this embodiment describes an 802.11n device or an 802.11ac device pair working in a first channel set. When the 802.11ac device of the second channel set generates interference, An adjustment method for an 802.11ac device operating in a second channel set. The adjustments implemented in this example are adjustments made within the second set of channels.
  • An 802.11n device operates on channel 11, channel 12, channel 13, and channel 14 of the first channel set with an 80 MHz bandwidth
  • another 802.11ac device operates at channel 21, channel 22, and channel 23 of the second channel set with an 80 MHz bandwidth.
  • channel 24 where channel 21 is the primary channel.
  • the 802.1 lac device performs channel detection and finds that the four channels currently working and channel 25 are both interfered.
  • the 802.11ac device initiates the working channel adjustment.
  • the 802.1 lac device scans and initiates a working channel adjustment based on the scan result. At this point, the device needs to adjust the channel position and channel bandwidth: Adjust the working channel to channel 26 and work in 20MHz bandwidth.
  • the access station After determining how to adjust, the access station sends a signaling to the non-access site associated with it, for example, sending a channel adjustment notification frame, which includes at least one of the following: adjusting the result and adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the non-access station adjusts to work on the new working channel after determining that the access station has been working on the new working channel according to the adjustment result. It is determined that the access station has worked on the new working channel as: Receive a frame transmitted by the access station on the new working channel, or after waiting for a reasonable transition time, determine that the access station is working on the new working channel.
  • a reasonable transition time may be a risk value for the time required for channel switching by a site preset by the non-access site.
  • FIG. 7 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 4 of the present invention.
  • this embodiment describes an 802.11n device or an 802.11ac device pair working in a first channel set.
  • An adjustment method of an 802.11ac device operating in a second channel set when an 802.11ac device of the second channel set generates interference.
  • the working channel can be adjusted to another channel set when the example is adjusted.
  • An 802.11n device operates on channel 11 and channel 12 of the first channel set with a 40 ⁇ bandwidth
  • another 802.11 ac device operates on channel 21 and channel 22 of the second channel set with a 40 MHz bandwidth, where channel 21 is the primary channel.
  • the 802.11ac device performs channel detection and finds that both channels currently working and channel 23 are interfered. When the interference related parameter exceeds or does not reach the predetermined interference threshold, the 802.1 lac device initiates the working channel adjustment. Alternatively, the 802.11ac device channel scans and initiates a working channel adjustment based on the scan result. The device can be adjusted in one of the following ways:
  • Adjust the working channel position in the second channel set Adjust the working channel to channel 24 and channel 25, or channel 25 and channel 26, the working bandwidth is unchanged, still 40MHz.
  • Adjust the channel position and channel bandwidth in the second channel set Adjust the working channel to channel 24, channel 25 or channel 26 to work in 20MHz bandwidth.
  • Adjust the working channel to the first channel set, working on channel 13 and channel 14, or on channel 11 and channel 12, still 40 MHz. Or use only one of them, working with a 20MHz bandwidth.
  • the primary channel also needs to be adjusted accordingly, and the new primary channel should be the same as the primary channel of at least one BSS on the adjusted channel.
  • the access station After determining how to adjust, the access station sends a signaling to the non-access station associated with it, for example, sends a channel adjustment notification frame, which includes at least one of the following: adjustment result, adjustment effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the non-access station adjusts to work on the new working channel after determining that the access station has been working on the new working channel according to the adjustment result. It is determined that the access station has worked on the new working channel as: Receive a frame sent by the access station on the new working channel, or after waiting for a reasonable transition time, determine that the access station is working on the new working channel.
  • a reasonable conversion time may be a site that is preset by a non-access site for channel switching. Change the risk value of the required time.
  • the working channel when the adjustment is made after the interference is detected, the working channel is adjusted to the first channel set. In subsequent operations, if the channel on the second set of channels is scanned or detected to meet the requirements (e.g., the interference falls below a predetermined threshold), the working channel can still be adjusted from the first channel to the second channel.
  • FIG. 8 is a schematic diagram of a working channel used between 802.11 devices with channel interference according to Embodiment 5 of the present invention. As shown in FIG. 8, this embodiment describes how interference occurs between 802.11ac devices working in a second channel set. Adjustment method. When making adjustments, it can be adjusted within the currently working channel set, or the working channel can be adjusted to another channel set.
  • the 802.11ac device operates on the channel 21 and the channel 22 of the second channel set with a 40 MHz bandwidth, wherein the channel 21 is the primary channel, and the 802.11ac device 2 operates on the channel 21, channel 22, and channel 23 of the second channel set with an 80 MHz bandwidth.
  • channel 24, where channel 23 is the primary channel in order to avoid interference, one of the following ways can be adjusted:
  • Both 802.11ac devices adjust the primary channel to channel 21 or channel 22.
  • the device adjusts the working channel to channel 25 and channel 26, and the working channel bandwidth is unchanged.
  • the primary channel also needs to be adjusted accordingly.
  • the primary channel on the new channel should be the same as the primary channel of the other BSSs on the channel.
  • the device adjusts the working channel to channel 25 or channel 26 to work in 20MHz bandwidth.
  • the device adjusts the working channel to the channel 15 of the first channel set and operates to a 20 MHz bandwidth.
  • Device 2 adjusts the working channel to channel 23 and channel 24, channel 25 and channel 26, and the working bandwidth is unchanged.
  • Device 2 adjusts the working channel to channels 21 and 22, or channel 23 and channel 24, or channel 25 and channel 26, and the operating bandwidth is adjusted to 40 MHz.
  • the primary channel also needs phase It should be adjusted that the primary channel on the new channel should be identical to the primary channel of the other BSS on that channel.
  • Device 2 adjusts the working channel to one of channel 23, channel 24, channel 25, and channel 26, and operates to a 20 MHz bandwidth.
  • Device 2 adjusts the working channel to channel 13 and channel 14, of the first channel set.
  • the primary channel also needs to be adjusted accordingly.
  • the primary channel on the new channel should be the same as the primary channel of other BSSs on the channel.
  • Device 2 adjusts the working channel to channel 13, channel 14 or channel 15 of the first channel set, and operates to a 20 MHz bandwidth.
  • the access station After determining how to adjust, the access station sends a signaling to the non-access site associated with it, for example, sending a channel adjustment notification frame, which includes at least one of the following: adjusting the result and adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the non-access station adjusts to work on the new working channel after determining that the access station has been working on the new working channel according to the adjustment result. It is determined that the access station has worked on the new working channel as: Receive a frame transmitted by the access station on the new working channel, or after waiting for a reasonable transition time, determine that the access station is working on the new working channel.
  • a reasonable transition time may be a risk value for the time required for channel switching by a site preset by the non-access site.
  • the working channel when the adjustment is made after the interference is detected, the working channel is adjusted to the first channel set. In subsequent work, if it is detected that the channel on the second set of channels meets the requirements (e.g., the interference falls below a predetermined threshold), the working channel can still be adjusted from the first channel to the second channel.
  • the channel adjusting apparatus of the present invention includes a scanning and detecting unit 90, a determining unit 91, and an adjusting unit 92, where
  • Scanning and detecting unit 90 configured to scan channels in more than one channel set and/or Detection
  • the determining unit 91 is configured to trigger the adjusting unit 92 when the current working channel is interfered according to the scanning and/or detecting result of the scanning and detecting unit;
  • the adjusting unit 92 is configured to adjust the working channel.
  • the determining unit 91 further determines, according to the detection result of the channel, that the current working channel is interfered when the interference related parameter received by the current working channel exceeds or fails to reach the set threshold; or, determining the current according to the scanning result of the channel. The working channel is disturbed.
  • the adjusting unit 92 specifically adjusts at least one of the following: a bandwidth of the working channel, a location of the working channel, a channel set to which the working channel belongs, and a primary channel of the working channel.
  • the adjusting unit 92 further adjusts the working channel bandwidth to: increase or decrease the bandwidth of the working channel;
  • Adjusting the location of the working channel is specifically: adjusting the working channel to other channels in the current channel set;
  • Adjusting the channel set to which the working channel belongs is specifically: replacing the working channel with the channel of the other channel set;
  • the main channel of the working channel is adjusted as follows:
  • the primary channel of the current BSS is adjusted to be the same channel as the primary channel of the other BSS.
  • the channel adjusting apparatus of the present invention shown in FIG. 9 further includes: a sending unit (not shown in FIG. 10), configured to send signaling to a non-access station associated with the access station, where the signaling includes at least the following parameters: A: adjusting the result, adjusting the effective time information; the signaling includes at least one of the following: a beacon frame, a probe response frame, and a channel adjustment notification frame.
  • the above adjustment unit 92 further,
  • the non-access station is adjusted to work on the new working channel when the adjustment effective time arrives;
  • Adjusting the non-access site to work on the new working channel wherein, after receiving the frame sent by the access station on the new working channel, or waiting for a reasonable conversion time, determining that the access station is already on the new working channel jobs.
  • the channel adjusting apparatus of the present invention determines how to adjust, and sends a signaling to the non-access station associated with it, for example, sends a channel adjustment notification frame, which includes at least one of the following: adjusting the result, adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the channel adjusting apparatus of the present invention includes a receiving unit 100, a determining unit 101, and an adjusting unit 102, wherein
  • the receiving unit 100 is configured to receive channel scan results and/or detection results sent by other non-access stations;
  • the determining unit 101 is configured to trigger the adjusting unit 102 when determining that the current working channel is interfered according to the scanning and/or detecting result;
  • the adjusting unit 102 is configured to adjust the working channel.
  • the device shown in FIG. 10 differs from the device shown in FIG. 9 mainly in that the device in FIG. 10 detects or scans a channel through a non-access site associated with the device of the present invention, and according to the scan result of the non-access site and / or the test result judges whether the working channel of the own work receives interference, and determines that the working channel is adjusted when the interference is received.
  • the determining unit 101 further determines that the current working channel is interfered when the interference related parameter received by the current working channel exceeds or does not reach the set threshold; or the determining unit further determines the current working channel according to the scanning result of the channel. Being disturbed.
  • the adjusting unit 102 specifically adjusts at least one of the following: a bandwidth of the working channel, a location of the working channel, a channel set to which the working channel belongs, and a primary channel of the working channel.
  • the adjusting unit 102 further adjusts the working channel bandwidth as follows: Or reduce the bandwidth of the working channel;
  • Adjusting the location of the working channel is specifically: adjusting the working channel to other channels in the current channel set;
  • Adjusting the channel set to which the working channel belongs is specifically: replacing the working channel with the channel of the other channel set;
  • the main channel of the working channel is adjusted as follows:
  • the primary channel of the current BSS is adjusted to be the same channel as the primary channel of the other BSS.
  • the channel adjusting apparatus of the present invention determines how to adjust, and sends a signaling to the non-access station associated with it, for example, sends a channel adjustment notification frame, which includes at least one of the following: adjusting the result, adjusting the effective time information.
  • the non-access site adjusts to work on the new working channel when the adjustment effective time arrives according to the adjustment result.
  • the channel adjusting apparatus of the present invention shown in FIG. 10 further includes: a sending unit (not shown in FIG. 10), configured to send signaling to a non-access station associated with the access station, where the signaling includes at least the following parameters: A: adjusting the result, adjusting the effective time information; the signaling includes at least one of the following: a beacon frame, a probe response frame, and a channel adjustment notification frame.
  • the above adjustment unit 102 further,
  • the non-access station is adjusted to work on the new working channel when the adjustment effective time arrives;
  • the non-access station is adjusted to work on the new working channel; wherein, the new working channel receives the frame sent by the access station. , or after waiting for a reasonable conversion time, determine that the access site is working on the new working channel.
  • the channel adjusting apparatus shown in FIG. 9 and FIG. 10 of the present invention is designed to implement the foregoing channel adjusting method, and the implementation functions of the above processing units can be understood by referring to the related description of the foregoing method.
  • the functions of the various processing units in the figure can be run by processing It can be realized by a program on the device, and can also be realized by a specific logic circuit.

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Description

信道调整方法及装置 技术领域
本发明涉及无线局域网络中相关网元中的信道调整技术, 尤其涉及一 种 802.11设备在当前工作信道存在干扰时的信道调整方法及装置。 背景技术
目前, 在无线网络领域, 无线局域网 (WLAN, Wireless Local Area Network )的发展相当迅速, WLAN覆盖需求日益增长。 电气和电子工程师 协会工业规范 IEEE802.il工作组先后定义了 802.11a, 802.11b, 802.11g等 一系列 WLAN技术标准, 随后又陆续出现了其他任务组, 致力于发展涉及 现有 802.11技术改进的规范, 例如, 802.11η任务组提出高吞吐量(HT, High Throughput ) 的要求, 以支持高达 600Mbps的数据速。 作为 802.11η 的演进, 802.1 lac任务组进一步提出 VHT ( Very High throughput ) 的概念, 将数据速率提升到 lGbps。 新的协议需要后向兼容现有协议。
在 802.11中, 一个接入站点 (AP, Access Point ) 以及与 AP相关联的 多个非接入站点( STA, Station )组成了一个基本服务集( BSS, Basic Service Set )。 802.11 定义了两种操作模式: 分布式协调功能 (DCF, Distributed Coordination Function )和点协调功能 ( PCF, Point Coordination Function ), 以及针对这两种操作模式的改进模式:增强型分布式协调访问功能( EDCA, Enhanced Distributed Channel Access )和混合协调功能控制信道访问功能 随着 802.11协议的演进,传统的 20MHz信道带宽已经扩展为 40MHz、 80MHz, 120MHz, 甚至是 160MHz, 这些大带宽是由若干个 20MHz绑定 形成的, 其中一个 20MHz称为主信道或第一信道, 其他 20MHz信道称为 辅信道或第二信道, 第三信道, 依次类推。 这样, 在 5GHz频谱上, 大带宽 由非重叠(non-overlapping ) 的 20MHz信道组成, 根据现有技术中的信道 化方法, 160MHz信道由相邻或不相邻的两个 80MHz信道组成,每个 80MHz 信道由相邻的两个 40MHz信道组成, 每个 40M信道由相邻的两个 20MHz 信道组成。 图 1为大带宽***不同信道带宽组成示意图, 如图 1所示, 在 5.725GHz至 5.850GHz频段,存在两种信道化方法:当中心频点从 5.745GHz 开始, 按照每个信道带宽为 20MHz划分时, 该频段内存在 5个 20MHz的 互不交叠的信道, 最大信道带宽为 80MHz; 如果将上述每个中心频点向低 频点方向偏移 7.5MHz时, 该频段内将产生 6个互不交叠的 20MHz信道, 最大信道带宽为 120MHz。 图 2为 5.725GHz至 5.850GHz频段内不同信道 化方法形成的信道集合示意图, 上述两种信道化方式具体如图 2所示。 以 下, 称前一信道化方式所形成的信道为第一信道集合, 称后一信道化方式 所形成的信道为第二信道集合。
在实际应用环境中,多个 BSS在覆盖区域上出现交叠的情形非常普遍, 从而形成 OBSS ( Overlapping BSS )。 OBSS情况下, 属于不同 BSS的多个 无线站点将共用相同的信道, 如图 3所示, 为 OBSS结构示意图, 其中, 接入点 A和接入点 B形成了 OBSS, 则处于 A和 B交叠区域的站点 C、 D 和 E有可能使用完全相同的信道, 从而互相形成潜在的干扰。
在 5.725GHz至 5.850GHz频段内,可能同时存在多个工作在不同 802.11 协议、 不同信道带宽、 或者不同信道化集合上的 BSS。 例如, 802.11η的设 备工作在第一信道集合上, 可能的工作带宽为 20/40MHz, 802.11ac的设备 工作在第一信道集合上,可能的工作带宽为 20/40/80MHz,或者工作在第二 信道集合上, 可能的工作带宽为 20/40/80/120MHz。 在上述情况下, 如果存 在 OBSS, 则会使得 AP和 STA之间采用大带宽进行传输时碰撞概率增大, 导致大带宽传输效率降低。 因此, 如何在 OBSS的情况下进行信道调整, 从而进行高效数据传输, 提高***的平均有效带宽是新一代 802.11协议中亟待解决的问题。 发明内容
有鉴于此, 本发明的主要目的在于提供一种信道调整方法及装置, 能 在 802.11设备受到干扰的情况下对设备的工作信道进行调整, 从而避免或 减少设备间的干扰, 提高传输的可靠性。
为达到上述目的, 本发明的技术方案是这样实现的:
一种信道调整方法, 包括:
对一个以上信道集合内的信道进行扫描和 /或检测, 或根据所接收到的 信道扫描结果和 /或检测结果, 确定当前工作信道受到干扰时, 对当前工作 信道进行调整。
优选地, 所述确定当前的工作信道受到干扰具体为:
接入站点根据自身对信道的检测或与其关联的非接入站点的检测判断 当前的工作信道受到的干扰相关参数超过或未达到设定阈值;
或者, 接入站点根据自身对信道的扫描结果或与其关联的非接入站点 上报的信道扫描结果确定存在信道干扰。
优选地, 所述对工作信道进行调整为:
对以下各项的至少一项进行调整: 工作信道的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信道。
优选地, 对工作信道带宽进行调整为: 增大或减小工作信道的带宽; 和 /或, 对工作信道的位置进行调整为: 将工作信道调整到当前信道集 合中的其他信道上;
和 /或, 对工作信道所属的信道集合进行调整为: 将工作信道更换到其 他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整为: 将当前基本服务集 (BSS ) 的主信道调整为与其他 BSS中的至少一个 BSS的主信道相同的信道。 优选地, 接入站点发送信令通知与其关联的非接入站点, 所述信令中 包括以下参数至少之一: 调整结果、 调整生效时间信息。 所述信令包括以 下至少之一: 信标帧 ( Beacon )、 探测响应帧 ( Probe Response )、 信道调整 通知帧。 非接入站点根据调整结果, 在调整生效时间到达时调整到新的工 作信道上工作; 或者, 非接入站点根据调整结果, 在确定接入站点已在新 的工作信道上工作后, 调整到新的工作信道上工作。 所述确定接入站点已 在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者 在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。
一种信道调整装置, 包括扫描及检测单元、 确定单元和调整单元, 其 中,
扫描及检测单元, 用于对一个以上信道集合内的信道进行扫描和 /或检 测;
确定单元, 用于根据所述扫描及检测单元的扫描和 /或检测结果确定当 前的工作信道受到干扰时, 触发调整单元;
调整单元, 用于对工作信道进行调整。
优选地, 所述确定单元进一步根据对信道的检测结果, 在当前的工作 信道受到的干扰相关参数超过或未达到设定阈值时, 确定当前的工作信道 受到干扰;
或者, 根据对信道的扫描结果确定当前的工作信道受到干扰。
优选地, 所述调整单元具体对以下各项的至少一个进行调整: 工作信 道的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信 道。
优选地, 所述调整单元进一步地, 对工作信道带宽进行调整为: 增大 或减小工作信道的带宽; 和 /或, 对工作信道的位置进行调整为: 将工作信道调整到当前信道集 合中的其他信道上;
和 /或, 对工作信道所属的信道集合进行调整为: 将工作信道更换到其 他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整为: 将当前 BSS的主信道调整为 与其他 BSS中的至少一个 BSS的主信道相同的信道。
优选地, 所述装置还包括:
发送单元, 用于向与接入站点关联的非接入站点发送信令, 所述信令 中包括以下参数至少之一: 调整结果、 调整生效时间信息; 所述信令包括 以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
优选地, 所述调整单元进一步地,
根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
一种信道调整装置, 包括接收单元、 确定单元和调整单元, 其中, 接收单元, 用于接收与该信道调整装置关联的非接入站点发送的信道 扫描结果和 /或检测结果;
确定单元, 用于根据所述扫描和 /或检测结果确定当前的工作信道受到 干扰时, 触发调整单元;
调整单元, 用于对工作信道进行调整。
优选地, 所述确定单元进一步在当前的工作信道受到的干扰相关参数 超过或未达到设定阈值时, 确定当前的工作信道受到干扰; 或者, 所述确 定单元进一步根据对信道的扫描结果确定当前的工作信道受到干扰。
优选地, 所述调整单元具体对以下各项的至少一项进行调整: 工作信 道的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信 道。
优选地, 所述调整单元进一步地, 对工作信道带宽进行调整为: 增大 或减小工作信道的带宽;
和 /或, 对工作信道的位置进行调整具体为: 将工作信道调整到当前信 道集合中的其他信道上;
和 /或, 对工作信道所属的信道集合进行调整具体为: 将工作信道更换 到其他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整具体为: 将当前 BSS的主信道调 整为与其他 BSS中的至少一个 BSS的主信道相同的信道。
优选地, 所述装置还包括:
发送单元, 用于向与接入站点关联的非接入站点发送信令, 所述信令 中包括以下参数至少之一: 调整结果、 调整生效时间信息; 所述信令包括 以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
优选地,, 所述调整单元进一步地,
根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
本发明中,当 802.11设备扫描或检测到自身的工作信道受到其他 802.11 设备的信道干扰时, 将会对自身的工作信道进行调整, 可以是对工作信道 的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信道 的任一项或任几项进行调整, 以避免自身的工作信道受到干扰, 从而, 降 低了 802.11设备之间的相互干扰, 提高了网络数据的传输速率, 保证了数 据传输的可靠性。 附图说明
图 1为大带宽***不同信道带宽组成示意图;
图 2为 5.725GHz至 5.850GHz频段内不同信道化方法形成的信道集合 示意图;
图 3为 OBSS结构示意图;
图 4为本发明实施例一中的存在信道干扰的 802.11设备间所使用工作 信道的示意图;
图 5为本发明实施例二中的存在信道干扰的 802.11设备间所使用工作 信道的示意图;
图 6为本发明实施例三中的存在信道干扰的 802.11设备间所使用工作 信道的示意图;
图 7为本发明实施例四中的存在信道干扰的 802.11设备间所使用工作 信道的示意图;
图 8为本发明实施例五中的存在信道干扰的 802.11设备间所使用工作 信道的示意图;
图 9为本发明信道调整装置的一种组成结构示意图;
图 10为本发明信道调整装置的另一种组成结构示意图。 具体实施方式
本发明的基本思想为, 当 802.11设备扫描或检测到自身的工作信道受 到其他 802.11设备的信道干扰时, 将会对自身的工作信道进行调整, 可以 是对工作信道的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作 信道的主信道的任一项或任几项进行调整, 以避免自身的工作信道受到干 扰。
为保证 802.11设备的高速率的数据传输和可靠性, 需使 802.11设备具 备信道调整功能, 即在确定自身的工作信道被其他信道干扰时, 对自身的 工作信道进行调整, 使用当前未被干扰的信道作为工作信道。 本发明中, 确定信道是否被干扰的方式有很多种, 如通过检测信道的信噪比, 或信道 质量指示(CQI, Channel Quality Indicator ), 或信道干净判定(CCA, Clear Channel Assessment )等来确定当前的工作信道是否被干扰。 例如, 通过设 定与信道干扰对应的测量值的阈值, 再对工作信道进行相应的测量, 若测 量量超出或未达到设定阈值, 则确定当前工作信道受到干扰, 例如, 当工 作信道的信噪比低于设定阈值时, 则确认当前工作信道受到干扰。 或者, AP对信道进行扫描,或者与 AP关联的 STA扫描后将扫描结果上报给 AP, 通过扫描结果, 获知是否与其他 BSS的工作信道存在交叠, 确定出当前工 作信道受到干扰。 信道干扰的扫描和检测方式并非本发明的重点, 也非是 实现本发明技术方案的难点, 这里不再赘述确定工作信道受到干扰的具体 方式, 可采用现有的信道干扰检测方式来实现。
本发明中, 802.11 设备进行工作信道调整的目的, 在保证数据传输可 靠性的前提下, 还需要保证当前的数据传输速率, 因此, 在具体实施过程 中进行工作信道调整时, 尽可能保证调整工作信道后的带宽, 只有在当前 未受干扰的信道较少时 , 才会降低当前工作信道的带宽。
另外, 当调整后的信道上存在其他的 BSS, 则需要尽可能地保证调整 后的主信道与其他的 BSS中的至少一个 BSS的主信道尽量相同。 这样, 在 信道调整过程中, 如果调整后的信道上存在其他的 BSS, 则将当前 BSS的 主信道调整为与调整后信道上已存的其他 BSS中的至少一个 BSS的主信道 相同的信道。 如果调整后的信道上没有其他 BSS工作, 则可以任意选择一 个信道作为主信道。
本发明中, 接入站点可以发送信令通知与其关联的非接入站点, 所述 信令中包括以下参数至少之一: 调整结果、 调整生效时间信息。 所述信令 包括以下至少之一: 信标帧 ( Beacon )、 探测响应帧 ( Probe Response )、 信 道调整通知帧。 非接入站点根据调整结果, 在调整生效时间到达时调整到 新的工作信道上工作; 或者, 非接入站点根据调整结果, 在确定接入站点 已在新的工作信道上工作后, 调整到新的工作信道上工作。 所述确定接入 站点已在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
实施例一
图 4为本发明实施例一中的存在信道干扰的 802.11设备间所使用工作 信道的示意图, 如图 4所示, 本实施例描述工作在第一信道集合的 802.11η 设备或 802.11ac设备,对工作在第二信道集合的 802.11ac设备产生干扰时, 对工作在第二信道集合的 802.11ac设备进行调整方法。 本示例中实施的调 整是在第二信道集合内进行的调整。
某 802.11η设备以 20MHz带宽工作在第一信道集合的信道 11上,另一 802.11ac设备以 40MHz带宽工作在第二信道集合的信道 21和信道 22上, 其中信道 21是主信道。 802.11ac设备进行信道检测, 发现当前工作的两个 信道受到了干扰, 当干扰相关参数超过或未达到预定的干扰门限值时, 802.11ac设备发起工作信道调整。 或者, 802.11ac设备进行信道扫描, 根据 扫描结果发起工作信道调整。 该设备可以进行如下方式之一进行调整:
1、 调整工作信道位置: 将工作信道调整到信道 23和信道 24, 或者信 道 25和信道 26, 工作带宽不变, 仍为 40MHz。
2、 调整信道位置和信道带宽: 将工作信道调整到信道 23、 信道 24、 信道 25和信道 26, 改为 80MHz带宽工作; 或者,调整到信道 23、信道 24、 信道 25和信道 26中之一, 改为 20MHz带宽工作。
进行上述调整时, 如果调整后的信道上存在其他 BSS, 则主信道也需 要相应地调整, 新的主信道应当与调整后的信道上的至少一个 BSS的主信 道相同。
确定如何调整后, 接入站点发送信令通知与其关联的非接入站点, 例 如发送一个信道调整通知帧, 其中包括以下至少之一: 调整结果、 调整生 效时间信息。 非接入站点根据调整结果, 在调整生效时间到达时调整到新 的工作信道上工作。 调整生效时间可以是一个帧计数值, 该值按照某种规 律自减, 当减为零时调整生效。 或者, 非接入站点根据调整结果, 在确定 接入站点已在新的工作信道上工作后, 调整到新的工作信道上工作。 确定 接入站点已在新的工作信道上工作为: 在新的工作信道收到接入站点发送 的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的工作信道上 工作。 在具体实现时, 合理的转换时间可以是非接入站点预先设置的站点 进行信道转换所需时间的一个经验值。
实施例二
图 5为本发明实施例二中的存在信道干扰的 802.11设备间所使用工作 信道的示意图, 如图 5所示, 本实施例描述工作在第一信道集合的 802.11η 设备或 802.11ac设备对工作在第二信道集合的 802.11ac设备产生干扰时, 工作在第二信道集合的 802.11ac设备进行信道调整方法。 本示例中实施的 调整是在第二信道集合内进行的调整。
某 802.11η设备以 40MHz带宽工作在第一信道集合的信道 11和信道 12上, 另一 802.11ac设备以 40MHz带宽工作在第二信道集合的信道 21和 信道 22上, 其中信道 21是主信道。 802.11ac设备进行信道检测, 发现当前 工作的两个信道以及信道 23都受到了干扰, 当干扰相关参数超过或未达到 预定的干扰门限值时, 802.11ac设备发起工作信道调整。 或者, 802.11ac设 备信道进行扫描, 根据信道扫描结果发起工作信道调整。 该设备可以进行 如下方式之一进行调整:
1、 调整工作信道位置: 将工作信道调整到信道 24和信道 25 , 或者信 道 25和信道 26上, 工作带宽不变, 仍为 40MHz。
2、 调整信道位置和信道带宽: 将工作信道调整到信道 24、 信道 25或 信道 26上, 改为 20MHz带宽工作。
进行上述调整时, 如果调整后的信道上存在其他 BSS, 则主信道也需 要相应地调整, 新的主信道应当与调整后的信道上的至少一个 BSS的主信 道相同。
确定如何调整后, 接入站点发送信令通知与其关联的非接入站点, 例 如发送一个信道调整通知帧, 其中包括以下至少之一: 调整结果、 调整生 效时间信息。 非接入站点根据调整结果, 在调整生效时间到达时调整到新 的工作信道上工作。 或者, 非接入站点根据调整结果, 在确定接入站点已 在新的工作信道上工作后, 调整到新的工作信道上工作。 确定接入站点已 在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者 在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。 在具 体实现时, 合理的转换时间可以是非接入站点预先设置的站点进行信道转 换所需时间的一个经险值。
实施例三
图 6为本发明实施例三中的存在信道干扰的 802.11设备间所使用工作 信道的示意图, 如图 6所示, 本实施例描述工作在第一信道集合的 802.11η 设备或 802.11ac设备对工作在第二信道集合的 802.11ac设备产生干扰时, 工作在第二信道集合的 802.11ac设备的调整方法。 本示例实施的调整是在 第二信道集合内进行的调整。
某 802.11η设备以 80MHz带宽工作在第一信道集合的信道 11、信道 12、 信道 13和信道 14上,另一 802.11ac设备以 80MHz带宽工作在第二信道集 合的信道 21、信道 22、信道 23和信道 24上,其中信道 21是主信道。 802.1 lac 设备进行信道检测, 发现当前工作的四个信道以及信道 25都受到了干扰, 当干扰相关参数超过或未达到预定的干扰门限值时, 802.11ac设备发起工作 信道调整。 或者, 802.1 lac设备信道进行扫描, 根据扫描结果发起工作信道 调整。 此时, 该设备需要调整信道位置和信道带宽: 将工作信道调整到信 道 26上, 改为 20MHz带宽工作。
确定如何调整后, 接入站点发送信令通知与其关联的非接入站点, 例 如发送一个信道调整通知帧, 其中包括以下至少之一: 调整结果、 调整生 效时间信息。 非接入站点根据调整结果, 在调整生效时间到达时调整到新 的工作信道上工作。 或者, 非接入站点根据调整结果, 在确定接入站点已 在新的工作信道上工作后, 调整到新的工作信道上工作。 确定接入站点已 在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者 在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。 在具 体实现时, 合理的转换时间可以是非接入站点预先设置的站点进行信道转 换所需时间的一个经险值。
实施例四
图 7为本发明实施例四中的存在信道干扰的 802.11设备间所使用工作 信道的示意图, 如图 7所示, 本实施例描述工作在第一信道集合的 802.11η 设备或 802.11ac设备对工作在第二信道集合的 802.11ac设备产生干扰时, 工作在第二信道集合的 802.11ac设备的调整方法。 与上述三个实施例不同 的是, 本示例进行调整时可以将工作信道调整至另一信道集合。 某 802.11η设备以 40ΜΗζ带宽工作在第一信道集合的信道 11和信道 12上, 另一 802.11ac设备以 40MHz带宽工作在第二信道集合的信道 21和 信道 22上, 其中信道 21是主信道。 802.11ac设备进行信道检测, 发现当前 工作的两个信道以及信道 23都受到了干扰, 当干扰相关参数超过或未达到 预定的干扰门限值时, 802.1 lac设备发起工作信道调整。 或者, 802.11ac设 备信道进行扫描, 根据扫描结果发起工作信道调整。 该设备可以进行如下 方式之一进行调整:
1、 在第二信道集合内调整工作信道位置: 将工作信道调整到信道 24 和信道 25, 或者信道 25和信道 26上, 工作带宽不变, 仍为 40MHz。
2、 在第二信道集合内调整信道位置和信道带宽: 将工作信道调整到信 道 24、 信道 25或信道 26上, 改为 20MHz带宽工作。
3、 将工作信道调整至第一信道集合, 工作在信道 13和信道 14上, 或 者信道 11和信道 12上, 仍为 40MHz。 或者只使用其中之一, 采用 20MHz 带宽工作。
同样地, 进行上述调整时, 如果调整后的信道上存在其他 BSS, 则主 信道也需要相应地调整, 新的主信道应当与调整后的信道上的至少一个 BSS的主信道相同。
确定如何调整后, 接入站点发送信令通知与其关联的非接入站点, 例 如发送一个信道调整通知帧, 其中包括以下至少之一: 调整结果、 调整生 效时间信息。 非接入站点根据调整结果, 在调整生效时间到达时调整到新 的工作信道上工作。 或者, 非接入站点根据调整结果, 在确定接入站点已 在新的工作信道上工作后, 调整到新的工作信道上工作。 确定接入站点已 在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者 在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。 在具 体实现时, 合理的转换时间可以是非接入站点预先设置的站点进行信道转 换所需时间的一个经险值。
在本实施例中, 在检测到干扰后进行调整时, 将工作信道调整到了第 一信道集合。 在后续的工作过程中, 如果扫描或检测到第二信道集合上的 信道满足要求(例如干扰降低到了预定门限以下), 则仍可以将工作信道再 由第一信道调整到第二信道。
实施例五
图 8为本发明实施例五中的存在信道干扰的 802.11设备间所使用工作 信道的示意图,如图 8所示,本实施例描述工作在第二信道集合的 802.11ac 设备之间产生干扰时的调整方法。 进行调整时可以在当前工作的信道集合 内调整, 也可以将工作信道调整至另一信道集合。
802.11ac设备一以 40MHz带宽工作在第二信道集合的信道 21和信道 22上, 其中信道 21是主信道, 802.11ac设备二以 80MHz带宽工作在第二 信道集合的信道 21、 信道 22、 信道 23和信道 24上, 其中信道 23是主信 道, 则为了避免干扰, 可以进行如下方式之一进行调整:
1、 两个 802.11ac设备将主信道均调整为信道 21或者信道 22。
2、 设备一调整工作信道为信道 25和信道 26, 工作信道带宽不变。 主 信道也需要相应地调整, 在新的信道上的主信道应当与该信道上其他 BSS 的主信道相同。
3、 设备一调整工作信道为信道 25或信道 26, 改为 20MHz带宽工作。
4、 设备一调整工作信道至第一信道集合的信道 15上, 改为 20MHz带 宽工作。
5、 设备二调整工作信道为信道 23和信道 24、 信道 25和信道 26, 工 作带宽不变。
6、 设备二调整工作信道为信道 21和 22, 或者信道 23和信道 24, 或 者信道 25和信道 26, 工作带宽调整为 40MHz。 5和 6时, 主信道也需要相 应调整, 在新的信道上的主信道应当与该信道上其他 BSS的主信道相同。
7、 设备二调整工作信道为信道 23、 信道 24, 信道 25、 信道 26之一, 改为 20MHz带宽工作。
8、设备二调整工作信道至第一信道集合的信道 13和信道 14,, 主信道 也需要相应调整, 在新的信道上的主信道应当与该信道上其他 BSS的主信 道相同。
9、 设备二调整工作信道至第一信道集合的信道 13、 信道 14或信道 15 上, 改为 20MHz带宽工作。
确定如何调整后, 接入站点发送信令通知与其关联的非接入站点, 例 如发送一个信道调整通知帧, 其中包括以下至少之一: 调整结果、 调整生 效时间信息。 非接入站点根据调整结果, 在调整生效时间到达时调整到新 的工作信道上工作。 或者, 非接入站点根据调整结果, 在确定接入站点已 在新的工作信道上工作后, 调整到新的工作信道上工作。 确定接入站点已 在新的工作信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者 在等待合理的转换时间后, 确定接入站点已在新的工作信道上工作。 在具 体实现时, 合理的转换时间可以是非接入站点预先设置的站点进行信道转 换所需时间的一个经险值。
在本实施例中, 在检测到干扰后进行调整时, 将工作信道调整到了第 一信道集合。 在后续的工作过程中, 如果检测到第二信道集合上的信道满 足要求(例如干扰降低到了预定门限以下), 则仍可以将工作信道再由第一 信道调整到第二信道。
图 9为本发明信道调整装置的一种组成结构示意图, 如图 9所示, 本 发明信道调整装置包括扫描及检测单元 90、 确定单元 91和调整单元 92, 其中,
扫描及检测单元 90, 用于对一个以上信道集合内的信道进行扫描和 /或 检测;
确定单元 91 , 用于根据所述扫描及检测单元的扫描和 /或检测结果确定 当前的工作信道受到干扰时, 触发调整单元 92;
调整单元 92, 用于对工作信道进行调整。
上述确定单元 91进一步根据对信道的检测结果, 在当前的工作信道受 到的干扰相关参数超过或未达到设定阈值时, 确定当前的工作信道受到干 扰; 或者, 根据对信道的扫描结果确定当前的工作信道受到干扰。
上述调整单元 92具体对以下各项的至少一项进行调整: 工作信道的带 宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信道。
上述调整单元 92进一步地, 对工作信道带宽进行调整具体为: 增大或 减小工作信道的带宽;
对工作信道的位置进行调整具体为: 将工作信道调整到当前信道集合 中的其他信道上;
对工作信道所属的信道集合进行调整具体为: 将工作信道更换到其他 信道集合的信道上;
对工作信道的主信道进行调整具体为: 将当前 BSS的主信道调整为与 其他 BSS的主信道相同的信道。
图 9所示本发明信道调整装置还包括, 发送单元(图 10中未示出), 用于向与接入站点关联的非接入站点发送信令, 所述信令中包括以下参数 至少之一: 调整结果、 调整生效时间信息; 所述信令包括以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
上述调整单元 92进一步地,
根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
本发明的信道调整装置确定如何调整后, 将发送信令通知与其关联的 非接入站点, 例如发送一个信道调整通知帧, 其中包括以下至少之一: 调 整结果、 调整生效时间信息。 非接入站点根据调整结果, 在调整生效时间 到达时调整到新的工作信道上工作。
图 10为本发明信道调整装置的另一种组成结构示意图, 如图 10所示, 本发明信道调整装置包括接收单元 100、 确定单元 101和调整单元 102, 其 中,
接收单元 100, 用于接收其他非接入站点发送的信道扫描结果和 /或检 测结果;
确定单元 101 , 用于根据所述扫描和 /或检测结果确定当前的工作信道 受到干扰时, 触发调整单元 102;
调整单元 102, 用于对工作信道进行调整。
图 10所示的装置与图 9所示装置的区别主要在于, 图 10中的装置通 过与本发明装置相关联的非接入站点对信道检测或扫描, 并根据非接入站 点的扫描结果和 /或检测结果对自身的工作信道是否收到干扰进行判断, 确 定出受到干扰时, 进行工作信道的调整。
上述确定单元 101 进一步在当前的工作信道受到的干扰相关参数超过 或未达到设定阈值时, 确定当前的工作信道受到干扰; 或者, 所述确定单 元进一步根据对信道的扫描结果确定当前的工作信道受到干扰。
上述调整单元 102具体对以下各项的至少一个进行调整: 工作信道的 带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信道。
上述调整单元 102进一步地, 对工作信道带宽进行调整具体为: 增大 或减小工作信道的带宽;
对工作信道的位置进行调整具体为: 将工作信道调整到当前信道集合 中的其他信道上;
对工作信道所属的信道集合进行调整具体为: 将工作信道更换到其他 信道集合的信道上;
对工作信道的主信道进行调整具体为: 将当前 BSS的主信道调整为与 其他 BSS的主信道相同的信道。
本发明的信道调整装置确定如何调整后, 将发送信令通知与其关联的 非接入站点, 例如发送一个信道调整通知帧, 其中包括以下至少之一: 调 整结果、 调整生效时间信息。 非接入站点根据调整结果, 在调整生效时间 到达时调整到新的工作信道上工作。
图 10所示本发明信道调整装置还包括, 发送单元(图 10中未示出), 用于向与接入站点关联的非接入站点发送信令, 所述信令中包括以下参数 至少之一: 调整结果、 调整生效时间信息; 所述信令包括以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
上述调整单元 102进一步地,
根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
本领域技术人员应当理解, 本发明图 9及图 10所示的信道调整装置是 为实现前述的信道调整方法而设计的, 上述各处理单元的实现功能可参照 前述方法的相关描述而理解。 图中的各处理单元的功能可通过运行于处理 器上的程序而实现, 也可通过具体的逻辑电路而实现。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种信道调整方法, 其特征在于, 所述方法包括:
对一个以上信道集合内的信道进行扫描和 /或检测, 或根据所接收到的 信道扫描结果和 /或检测结果, 确定当前的工作信道受到干扰时, 对工作信 道进行调整。
2、 根据权利要求 1所述的方法, 其特征在于, 所述确定当前的工作信 道受到干扰为:
接入站点根据自身对信道的检测或与其关联的非接入站点的检测判断 当前的工作信道受到的干扰相关参数超过或未达到设定阈值;
或者, 接入站点根据自身对信道的扫描结果或与其关联的非接入站点 上报的信道扫描结果确定存在信道干扰。
3、 根据权利要求 1所述的方法, 其特征在于, 所述对工作信道进行调 整为:
对以下各项的至少一项进行调整: 工作信道的带宽、 工作信道的位置、 工作信道所属的信道集合、 工作信道的主信道。
4、 根据权利要求 3所述的方法, 其特征在于, 对工作信道带宽进行调 整为: 增大或减小工作信道的带宽;
和 /或, 对工作信道的位置进行调整为: 将工作信道调整到当前信道集 合中的其他信道上;
和 /或, 对工作信道所属的信道集合进行调整为: 将工作信道更换到其 他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整为: 将当前基本服务集 BSS的主 信道调整为与其他 BSS中的至少一个 BSS的主信道相同的信道。
5、 根据权利要求 1至 4任一项所述的方法, 其特征在于, 所述方法还 包括: 接入站点发送信令通知与其关联的非接入站点, 所述信令中包括以下 参数至少之一: 调整结果、 调整生效时间信息; 所述信令包括以下至少之 一: 信标帧、 探测响应帧、 信道调整通知帧。
6、 根据权利要求 5所述的方法, 其特征在于, 所述对工作信道进行调 整为:
非接入站点根据调整结果, 在调整生效时间到达时调整到新的工作信 道上工作;
或者, 非接入站点根据调整结果, 在确定接入站点已在新的工作信道 上工作后, 调整到新的工作信道上工作; 所述确定接入站点已在新的工作 信道上工作为: 在新的工作信道收到接入站点发送的帧, 或者在等待合理 的转换时间后, 确定接入站点已在新的工作信道上工作。
7、 一种信道调整装置, 其特征在于, 所述装置包括扫描及检测单元、 确定单元和调整单元, 其中,
扫描及检测单元, 用于对一个以上信道集合内的信道进行扫描和 /或检 测;
确定单元, 用于根据所述扫描及检测单元的扫描和 /或检测结果确定当 前的工作信道受到干扰时, 触发调整单元;
调整单元, 用于对工作信道进行调整。
8、 根据权利要求 7所述的装置, 其特征在于, 所述确定单元进一步根 据对信道的检测结果, 在当前的工作信道受到的干扰相关参数超过或未达 到设定阈值时, 确定当前的工作信道受到干扰;
或者, 根据对信道的扫描结果确定当前的工作信道受到干扰。
9、 根据权利要求 7所述的装置, 其特征在于, 所述调整单元具体对以 下各项的至少一项进行调整: 工作信道的带宽、 工作信道的位置、 工作信 道所属的信道集合、 工作信道的主信道。
10、 根据权利要求 9所述的装置, 其特征在于, 所述调整单元进一步 地, 对工作信道带宽进行调整为: 增大或减小工作信道的带宽;
对工作信道的位置进行调整为: 将工作信道调整到当前信道集合中的 其他信道上;
和 /或, 对工作信道所属的信道集合进行调整为: 将工作信道更换到其 他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整为: 将当前 BSS的主信道调整为 与其他 BSS中的至少一个 BSS的主信道相同的信道。
11、 根据权利要求 7至 10任一项所述的装置, 其特征在于, 所述装置 还包括:
发送单元, 用于向与接入站点关联的非接入站点发送信令, 所述信令 中包括以下参数至少之一: 调整结果、 调整生效时间信息; 所述信令包括 以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
12、 根据权利要求 11所述的装置, 其特征在于, 所述调整单元进一步 地,
根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
13、 一种信道调整装置, 其特征在于, 所述装置包括接收单元、 确定 单元和调整单元, 其中,
接收单元, 用于接收与该信道调整装置关联的非接入站点发送的信道 扫描结果和 /或检测结果; 确定单元, 用于根据所述扫描和 /或检测结果确定当前的工作信道受到 干扰时, 触发调整单元;
调整单元, 用于对工作信道进行调整。
14、 根据权利要求 13所述的装置, 其特征在于, 所述确定单元进一步 在当前的工作信道受到的干扰相关参数超过或未达到设定阈值时, 确定当 前的工作信道受到干扰; 或者, 所述确定单元进一步根据信道的扫描结果 确定当前的工作信道受到干扰。
15、 根据权利要求 13所述的装置, 其特征在于, 所述调整单元具体对 以下各项的至少一项进行调整: 工作信道的带宽、 工作信道的位置、 工作 信道所属的信道集合、 工作信道的主信道。
16、 根据权利要求 15所述的装置, 其特征在于, 所述调整单元进一步 地, 对工作信道带宽进行调整为: 增大或减小工作信道的带宽;
和 /或, 对工作信道的位置进行调整为: 将工作信道调整到当前信道集 合中的其他信道上;
和 /或, 对工作信道所属的信道集合进行调整为: 将工作信道更换到其 他信道集合的信道上;
和 /或, 对工作信道的主信道进行调整为: 将当前 BSS的主信道调整为 与其他 BSS中的至少一个 BSS的主信道相同的信道。
17、 根据权利要求 13至 16任一项所述的装置, 其特征在于, 所述装 置还包括:
发送单元, 用于向与接入站点关联的非接入站点发送信令, 所述信令 中包括以下参数至少之一: 调整结果、 调整生效时间信息; 所述信令包括 以下至少之一: 信标帧、 探测响应帧、 信道调整通知帧。
18、 根据权利要求 17所述的装置, 其特征在于, 所述调整单元进一步 地, 根据调整结果, 在调整生效时间到达时将非接入站点调整到新的工作 信道上工作;
或者, 根据调整结果, 在确定接入站点已在新的工作信道上工作后, 将非接入站点调整到新的工作信道上工作; 其中, 在新的工作信道收到接 入站点发送的帧, 或者在等待合理的转换时间后, 确定接入站点已在新的 工作信道上工作。
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