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A reply method and device for multicast data transmission

A technology of multicast data and response device, applied in the field of wireless communication, can solve the problems of inability to obtain data reception quality of all sites, poor reception quality of sites, etc.

Active Publication Date: 2021-02-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the AP cannot obtain the data reception quality of all stations, resulting in poor reception quality of some stations, the embodiment of the present invention provides a response method and device for multicast data transmission, which can enable the AP to better confirm The reception of multicast data is conducive to the retransmission of subsequent multicast data

Method used

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  • A reply method and device for multicast data transmission
  • A reply method and device for multicast data transmission

Examples

Experimental program
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Effect test

Embodiment 1

[0189] In this example, the AP is the first node, that is, the multicast data sender, and the station is the second node, that is, the multicast data receiver. In addition, the multicast data sender can also be some other devices, such as base stations, A special site capable of communicating with multiple sites can be considered as a multicast data sender as long as it can send multicast data. Here, the sending or receiving of multicast data actually refers to the sending or receiving of multicast frames.

[0190] The AP and multiple stations STA1~STA20 form a BSS. The AP establishes a multicast service 1 with STA1~STA10. The corresponding STA1~STA10 considers it a multicast group 1, and assigns a multicast MAC address 1 to identify the multicast For services, the main difference between multicast MAC addresses and unicast MAC addresses (such as STA1~STA10) is that the multicast address sets the I / G bit of the address to 1, and the unicast address sets this bit to 0, for examp...

Embodiment 2

[0201] In this example, the AP is the first node, that is, the multicast data sender, and the station is the second node, that is, the multicast data receiver. In addition, the multicast data sender can also be some other devices, such as base stations, A special site capable of communicating with multiple sites can be considered as a multicast data sender as long as it can send multicast data. Here, the sending or receiving of multicast data actually refers to the sending or receiving of multicast frames.

[0202] The AP and multiple stations STA1~STA20 form a BSS. The AP establishes a multicast service 1 with STA1~STA10. The corresponding STA1~STA10 considers it a multicast group 1, and assigns a multicast MAC address 1 to identify the multicast business.

[0203] The AP sends multiple multicast service 1 data to STA1~STA10. After the sending is completed, the AP sends trigger information, such as the trigger frame MU-BAR to stations STA1~STA10. Assuming that the total sendi...

Embodiment 3

[0208] In this example, the AP is the first node, that is, the multicast data sender, and the station is the second node, that is, the multicast data receiver. In addition, the multicast data sender can also be some other devices, such as base stations, A special site capable of communicating with multiple sites can be considered as a multicast data sender as long as it can send multicast data. Here, the sending or receiving of multicast data actually refers to the sending or receiving of multicast frames.

[0209] The AP and multiple stations STA1~STA20 form a BSS, and the AP establishes multicast service 1 with STA1~STA5, and the corresponding STA1~STA5 consider it a multicast group 1, and assign a multicast MAC address 1 to identify the multicast service, at the same time assign a multicast short identifier multicast ID1 to the multicast service 1, the same AP establishes a multicast service 2 with STA6~STA10, and assigns a multicast MAC address 2 to identify the multicast s...

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Abstract

The invention discloses a response method and device for multicast data transmission. The method includes: a first node sends one or more multicast frames to one or more multicast groups, and the multicast group is composed of more than one second node composition; the second node receives one or more multicast frames, and the multicast address carried by the multicast frame corresponds to the multicast group where the second node is located; the first node sends trigger information to one or more multicast groups Corresponding to multiple second nodes, when the second node receives the trigger information sent by the first node, and determines that the second node is a second node that randomly competes to send the multicast response frame, the second node randomly receives the trigger information distribution Competing to send a multicast response frame on the incoming resource block; when it is determined that the second node is the second node that sends the multicast response frame regularly, the second node sends the multicast on the specified fixed access resource block according to the trigger information answer.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a response method and device for reliable multicast data transmission in a carrier detection access network. Background technique [0002] A basic service set (BSS, basic service set) of a wireless local area network (WLAN, Wireless Local Area Network) is generally as follows figure 1 As shown, the BSS generally includes an access point (AP, Access Point) and multiple non-AP stations (non-AP stations). At present, there may be many multicast or broadcast services (collectively referred to as multicast) in WLAN, such as the multicast service of video content. Before sending the multicast service, it is generally necessary to establish the multicast service. Establish a relationship with the multicast service, and set a multicast address for the multicast service. In early WLAN networks, this kind of multicast service was generally a best-effort service. After the AP sent th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/10H04W48/16H04W72/00H04W74/08
CPCH04W4/06H04W84/12H04L1/1621H04W74/0808H04W80/02
Inventor 邢卫民吕开颖孙波
Owner ZTE CORP
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