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Method for distinguishing broadcast frames from multicast frames in site

A multicast frame and broadcast frame technology, applied in advanced technology, power management, electrical components, etc., can solve problems such as energy waste, and achieve the effects of improving life cycle, avoiding waste, and reducing energy loss

Active Publication Date: 2014-07-23
XIDIAN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a method for distinguishing broadcast frames and multicast frames based on the characteristics of IEEE802.11ah application scenarios based on the power management mode of the 802.11 infrastructure type BSS wireless local area network. method to avoid the problem of energy waste caused by stations receiving unnecessary multicast frames

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  • Method for distinguishing broadcast frames from multicast frames in site
  • Method for distinguishing broadcast frames from multicast frames in site
  • Method for distinguishing broadcast frames from multicast frames in site

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Embodiment Construction

[0022] The implementation steps of the present invention will be further described in detail with reference to the accompanying drawings.

[0023] In the power saving mode of the IEEE802.11 standard, the access point AP uses the first bit of the Bitmap Control field as the station instruction to deliver the buffered broadcast frame or multicast frame, and the station cannot distinguish the type of the buffered frame. The present invention adopts figure 2 The format of the DTIM Count field in this field includes three parts: "Frame Type", "Group Number" and "Count". "Frame Type" indicates the type of the buffer frame delivered by the access point AP, and "Group ID" indicates the group ID of the multicast frame delivered by the AP. When the access point AP needs to deliver buffered broadcast frames or multicast frames, the content of "Count" is 0. By checking the Frame Type and Group Number, the station can selectively receive buffered frames sent by the access point AP.

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Abstract

The invention discloses a method for distinguishing broadcast frames from multicast frames in a site. The method mainly solves the problem that in the prior art, due to the fact that the broadcast frames from the multicast frames in the site cannot be distinguished, energy is wasted. The method comprises the steps that firstly, an access point (AP) issues cached broadcast frames or multicast frames within the period of transmission service indication information DTIM beacons, and the first bit of a Bitmap Control domain is set to be 1; secondly, the AP sets the frame type and the group number of a DTIM Count domain according to the types of the cached frames needing to be issued; thirdly, the site checks the DTIM Count domain to know the types of the cached frames needing to be issued, and selectively receives the cached frames. According to the method, the site does not need to receive unnecessary multicast frames, the energy loss of the site is reduced, the service life of the network is prolonged, and the method can be applied to the IEEE802.11ah wireless network and communication between the AP and the site.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and further relates to a method for a station to distinguish broadcast frames and multicast frames in IEEE802.11ah. It can be used for the station to distinguish the type of the frame when the access point AP has a broadcast frame or multicast frame to be buffered during the transmission service indication information DTIM beacon period. Background technique [0002] At present, with the wide-scale application of technologies such as the Internet of Things, the current wireless local area network WLAN standard has been unable to meet the demand, and the low-frequency and low-power wireless local area network WLAN has become a new focus. IEEE802.11ah is being drafted and formulated as a new standard for low-frequency wireless local area network WLAN specially oriented to the Internet of Things. It works in the frequency band below 1GHz and can support applications such as smart mete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02
CPCY02D30/70
Inventor 李长乐陈睿杨锦端玉龙
Owner XIDIAN UNIV