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Method and device for sending multicast flow in unicast mode

A multicast stream and unicast technology, applied in the field of communication, can solve the problems of occupying the air interface time and infeasibility, and achieve the effect of saving time

Active Publication Date: 2014-06-25
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the number of receiving terminals is too large or the video traffic is large, this method will occupy a large amount of air interface time due to the excessive number of copies of a message, and may even be unfeasible.

Method used

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  • Method and device for sending multicast flow in unicast mode

Examples

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Embodiment 1

[0032] This embodiment proposes a method for sending a multicast stream in unicast mode. By extending the frame format of a multi-user MU (Multiple User, multi-user) PPDU (PLCP Protocol Data Unit, physical layer convergence protocol data unit), the group The space-time streams (STS, space time streams) formed by space-time encoding of broadcast or broadcast streams are sent to two or more users in the target user group simultaneously in unicast mode, and can be sent in unicast frames When multicasting data, the number of unicast frames to be sent is reduced, and the time occupied by the air interface is saved; wherein, the space-time stream refers to a data stream encoded by combining space-division multiple access coding technology and time-division multiple access coding technology.

[0033] This embodiment proposes a method for sending a multicast stream in unicast mode, which is applied to a station in a wireless communication system; where the station usually includes an A...

Embodiment 2

[0056] This embodiment proposes a method for sending multicast streams in unicast mode. By extending the multi-user MUPPDU frame format, after encapsulating multicast or broadcast streams and unicast streams, they are simultaneously sent to the target in unicast mode. Two or more users in the user group can reduce the number of unicast frames sent when using unicast frames to send multicast data, saving the time occupied by the air interface;

[0057] This embodiment proposes a method for sending a multicast stream in unicast mode, which is applied to a station in a wireless communication system; where the station usually includes an AP or STA in the wireless communication system. See Figure 7 , the method includes:

[0058] S701. Send a data frame in VHT PPDU format to other stations belonging to the same user group; the data frame includes a multicast identifier and a location identifier; wherein the location identifier indicates the storage of the number of multicast spac...

Embodiment 3

[0073] See Figure 10 In an embodiment of the present application, a device 100 for sending multicast streams in unicast mode is also proposed, wherein the hardware architecture involved in the device carrying the device 100 of the present invention usually includes CPU, memory, non-volatile memory , IO interface and other hardware. Taking software implementation as an example, the device 100 of the present invention can generally be understood as a computer program loaded in the memory, and a logic device combining software and hardware formed after the CPU runs; the device 100 includes:

[0074] The first sending module 101 is configured to send a data frame in VHTPPDU format to other stations belonging to the same user group; the data frame includes a multicast identifier;

[0075] The first receiving module 102 is used to receive data frames in VHT PPDU format from other sites, and judge whether the multicast identifier in the data frame is a preset value, and if so, comp...

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Abstract

The invention provides a method and device for sending multicast flow in a unicast mode. The method comprises the steps of sending data frames in the VHT PPDU format to other stations belonging to the same user group, wherein multicast identification is contained in the data frames; receiving the data frames in the VHT PPDU format from other stations, judging whether the multicast identification in the data frames is a preset value, and if the multicast identification is the preset value, receiving all space-time flow in the data frames according to the space-time flow number indicated by a unique NSTS field when the group ID of the own user group is matched with the group ID contained in the data frames. By the adoption of the method and device for sending multicast flow in the unicast mode, multicast flow can be sent in the unicast frame mode with less frames, and air interface occupying time is shortened.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for sending multicast stream in unicast mode. Background technique [0002] In WLAN (Wireless Local Area Networks, wireless local area network), with the release of the 802.11ac standard, the multi-user MIMO (Multiple-Input Multiple-Output, multiple-input multiple-output) technology has entered the standard, and a wireless access point can support more With more terminals accessing, WLAN applications will become more and more common. But on the other hand, there has been no great progress in carrying out multicast video on WLAN. This is mainly because WLAN has a higher packet loss rate during message forwarding compared to wired network transmission, and the sending of multicast frames lacks a response mechanism and a retransmission mechanism, so this packet loss rate causes multicast video The effect is greatly affected. [0003] Therefore, ...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W28/06
Inventor 徐国祥
Owner NEW H3C TECH CO LTD
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