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A method for indicating uplink channel state, coordinator and user equipment

A channel status indication and channel status technology, applied in the field of visible light communication, can solve problems such as inability to send in time, reduce system throughput, and data transmission conflicts, and achieve the effects of improving throughput, avoiding transmission conflicts, and avoiding resource waste

Active Publication Date: 2021-01-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing scheme, if the coordinator has downlink traffic to send, the coordinator can no longer send idle patterns
Therefore, in the existing scheme, when the state of the uplink channel changes from the idle state to the busy state, if the coordinator happens to have downlink traffic being sent, the coordinator cannot send an in-band idle pattern in time to indicate that the uplink channel is in a busy state. The UE cannot know in time that the uplink channel is occupied. If the UE transmits data on the uplink channel at this time, it will conflict with the ongoing data transmission on the uplink channel, thereby reducing the system throughput.

Method used

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  • A method for indicating uplink channel state, coordinator and user equipment
  • A method for indicating uplink channel state, coordinator and user equipment
  • A method for indicating uplink channel state, coordinator and user equipment

Examples

Experimental program
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Effect test

example 1

[0091] Example 1: The UE determines the state of the uplink channel by detecting the downlink signal frame or the idle pattern frame;

[0092] The UE detects the frame header of the downlink signal frame or the idle pattern frame.

[0093] If the uplink channel status indication field in the frame header of the downlink signal frame or the idle pattern frame indicates that the uplink channel is in a busy state, the UE waits for the duration indicated by the "duration" field in the uplink channel status indication field in the frame header to end Then detect the uplink channel;

[0094] If the uplink channel state indication field in the frame header of the downlink signal frame or the idle pattern frame indicates that the uplink channel is in an idle state, the UE starts to compete for the uplink channel.

example 2

[0095] Example 2: The UE determines the state of the uplink channel by detecting the downlink signal frame or the idle pattern sequence;

[0096] (1) If the UE detects the frame header of the downlink signal frame when it starts to detect the state of the uplink channel, then: 1. If the uplink channel status indication field in the frame header indicates that the uplink channel is in a busy state, the UE waits for the uplink signal frame in the frame header The channel is detected after the duration indicated by the "duration" field in the channel state indication field ends; 2. If the UE detects the frame header of the downlink signal frame, and the uplink channel state indication field in the frame header indicates that the uplink channel is idle state, the UE starts to compete for the uplink channel;

[0097] (2) If the UE detects the idle pattern sequence when it starts to detect the state of the uplink channel, then: 1. If the idle pattern sequence indicates that the upli...

example 3

[0098] Example 3: The UE competes for the uplink channel by detecting a downlink signal frame or an idle pattern frame or an inter-frame synchronization sequence;

[0099] (1) If the UE detects the frame header of the downlink signal frame or idle pattern frame when it starts to detect the uplink channel status, then: 1. If the uplink channel status indication field in the frame header indicates that the uplink channel is busy, the UE waits for the frame header 2. If the uplink channel status indication field in the frame header indicates that the uplink channel is idle, the UE starts to compete for the uplink channel.

[0100] (2) If the UE detects the inter-frame synchronization sequence when it starts to detect the state of the uplink channel, then: 1. If the inter-frame synchronization sequence indicates that the uplink channel is busy, the UE waits for the uplink channel to become idle; 2. If the inter-frame synchronization sequence Indicates that the uplink channel is id...

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Abstract

The embodiment of the present invention discloses an indication method, a coordinator and a user equipment of an uplink channel state, which can avoid the transmission conflict problem of the uplink channel and improve the throughput of the system. The method in the embodiment of the present invention includes: the coordinator determines the state of the uplink channel; the coordinator generates a downlink signal according to the state of the uplink channel; the coordinator sends the downlink signal to the user equipment UE; wherein the downlink signal is a downlink A signal frame or an idle pattern frame, the frame headers of the downlink signal frame and the idle pattern frame both include an uplink channel state indication field, and the uplink channel state indication field is used to indicate the state of the uplink channel; or the downlink signal is an idle pattern sequence, where the idle pattern sequence indicates the state of the uplink channel.

Description

technical field [0001] The present invention relates to the field of visible light communication, in particular to a method for indicating the state of an uplink channel, a coordinator and user equipment. Background technique [0002] Visible light communication (visible light communication, VLC) refers to a communication method that uses electromagnetic waves in the visible light frequency range as the communication transmission medium. In essence, visible light communication is to change the intensity of light emitting diode (Light emitting diode, LED) light source to realize signal transmission. Visible light communication network is also called visible light communication personal area network (Visible light communication personal area network, VPAN). The VPAN network consists of a coordinator and multiple user equipments (User Equipment, UE), where the coordinator is represented by an LED light. At present, the main problem faced by the VPAN network is the problem of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04W72/12
CPCH04B10/116H04W72/12
Inventor 董晨姜彤
Owner HUAWEI TECH CO LTD
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