Method, equipment and system for channel switching

A channel switching and channel technology, applied in the field of communication, can solve problems such as increasing STA power consumption

Inactive Publication Date: 2014-03-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, when using the method defined by the above 802.11h and 802.11y standards for the AP to notify the STA to perform channel switching, there is a high possibility that the STA is in a dormant state and has not received information related to channel switching, so that the STA needs to restart after waking up. Scanning channels, performing re-association and other operations increase the power consumption of STAs

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  • Method, equipment and system for channel switching
  • Method, equipment and system for channel switching
  • Method, equipment and system for channel switching

Examples

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Embodiment 1

[0102] figure 1 It is a schematic flowchart of a channel switching method according to an embodiment of the present invention. like figure 1 As shown, the channel switching method includes the following processes:

[0103] 101. The second AP receives an uplink packet sent by a terminal STA associated with the first AP, and the first AP works on the same channel as the second AP before performing channel switching;

[0104] Specifically, assume the following application scenario: STA communicates with the first AP, and the communication channel is Channel A (ChannelA); the first AP needs to switch the channel to Channel B due to serious interference; the second AP is currently on Channel A normally work, and the first AP and the second AP can exchange information through one or more wireless controllers (Access Controller, AC).

[0105] After the STA associated with the first AP wakes up from sleep, it sends an uplink packet. Among them, the uplink packet can be sent by the...

Embodiment 2

[0114] figure 2 It is an information interaction diagram of a channel switching method according to an embodiment of the present invention. like figure 2 As shown, the channel switching method includes the following steps:

[0115] 201. The first AP sends channel switching related information to the second AP working on the same channel through the AC. The channel switching related information includes the MAC address of the first AP, the type of the new channel after the first AP performs channel switching, and the new channel number of

[0116] Among them, the 802.11 standard clearly stipulates the channel types and numbers in different countries and regions in the world.

[0117] 202. The first AP performs channel switching;

[0118] 203. The STA associated with the first AP cannot find the first AP after waking up, and sends a probe request frame unicast to the first AP on the current channel, or broadcasts a probe request frame carrying the MAC address of the first ...

Embodiment 3

[0130] Figure 5 It is an information interaction diagram of a channel switching method according to an embodiment of the present invention. Such as Figure 5 As shown, the channel switching method includes the following steps:

[0131] 501. The first AP broadcasts channel switching notification information, and sends channel switching related information to a second AP working on the same channel through the AC. The channel switching related information includes the MAC address of the first AP, and the first AP performs channel switching. the type of new channel and the number of the new channel;

[0132] 502. The first AP performs channel switching;

[0133] 503. The STA associated with the first AP has not received the channel switching notification information of the first AP due to dormancy, and wakes up when the STA has an uplink data packet (DATA) to send during the dormancy period, and sends an uplink data packet to the first AP; Or after the STA wakes up for any r...

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Abstract

The embodiment of the invention provides a method, equipment and a system for channel switching. The method comprises the following steps: a second AP receives an upstream packet transmitted from a terminal STA related to a first AP, the first AP works on one same channel with the second AP before executing channel switching; the second AP responds to the upstream packet, transmits channel switching related information of the first AP to the STA so as to enable the STA execute corresponding channel switching according to the channel switching related information. Through the adoption of the method, equipment and system provided by the embodiment of the invention, the probability that the AP successfully informs the STA to execute channel switching is effectively improved, so that the possibility that the power consumption is increased as the STA cannot acquire the channel switching related information is reduced.

Description

technical field [0001] The invention relates to network communication technology, in particular to a channel switching method, device and system, and belongs to the field of communication technology. Background technique [0002] The 802.11ah standard can support multiple bandwidths, including 1MHz, 2MHz, 4MHz, 8MHz and 16MHz, among which 1MHz and 2MHz are mandatory. When the Basic Service Set (BSS) working on the 2MHz bandwidth finds that the upper half of the 1MHz channel or the lower half of the 1MHz channel is severely interfered by the neighboring BSS, or when the entire 2MHz channel is severely interfered with, then the The access point (Access Point, AP) needs to switch the channel to another new 1MHz or 2MHz channel with less interference. In addition, the 917MHz-923.5MHz frequency band in South Korea is jointly used by sensor devices supported by 802.11ah and radio frequency identification (Radio Frequency Identification, RFID) devices. When the 802.11ah device fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/24
CPCH04W36/24H04W36/0055Y02B60/50Y02D30/70
Inventor 姜艳平赵牧甄斌
Owner HUAWEI TECH CO LTD
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