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Method and device for switching transmission configuration indication state (TCI) state

A technology of indication and status, applied in the direction of transmission path sub-channel allocation, transmission system, digital transmission system, etc.

Pending Publication Date: 2021-12-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Then, when the network device sends signaling to the terminal device for TCI state switching, there will also be a delay, for example, it is recorded as the switching delay

Method used

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  • Method and device for switching transmission configuration indication state (TCI) state
  • Method and device for switching transmission configuration indication state (TCI) state
  • Method and device for switching transmission configuration indication state (TCI) state

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Embodiment Construction

[0127] The technical solution in this application will be described below with reference to the accompanying drawings.

[0128] The embodiments of the present application can be applied to beam-based communication systems, for example: fifth generation (5th generation, 5G) system, new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division dual frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunication system (universal mobile telecommunication system, UMTS) or other evolved communication systems, etc.

[0129] The communication system to which this embodiment of the present application is applied may include one or more network devices and one or more terminal devices. A network device can transmit data or control signaling to one or more terminal devices. Alternatively, multiple network devices may simultaneously transmit data or control signaling for a termina...

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Abstract

The invention provides a method and a device for switching the transmission configuration indication state (TCI) state. The method may comprise the following steps: in the process that the terminal equipment communicates with the network equipment by using a first TCI state, receiving a switching signaling sent by the network equipment, the switching signaling being used for indicating an activated second TCI state; and after a period of time when the switching signaling is received, the terminal equipment can communicate with the network equipment by using a second TCI state, and the length of the period of time is related to whether reference signals in the second TCI state and the first TCI state coincide or not, and / or whether the reference signals in the second TCI state and the reference signals in the first TCI state have a QCL relationship with the same signal or not. According to the invention, the TCI state switching time delay, especially the time delay for receiving beam search and the time delay for re-synchronization of time and frequency, can be greatly reduced.

Description

technical field [0001] The present application relates to the field of wireless communication, and in particular to a method and device for TCI state switching of a transmission configuration indication state. Background technique [0002] In the communication process, such as high-frequency communication, network devices and terminal devices communicate through directional beams. Generally speaking, the selection of the receiving and transmitting beams of the terminal equipment depends on the beam indication information provided by the network equipment. The beam indication information is generally performed in the form of indicating a transmission configuration indicator (transmission configuration indicator, TCI) state (TCI state). [0003] In actual communication, the signaling sent by the network equipment is correctly received by the terminal equipment, and there is a period of time delay between when the terminal equipment starts to actually apply the signaling instr...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04L5/00
CPCH04W72/046H04L5/0048H04W72/23H04W72/04H04L5/00
Inventor 管鹏
Owner HUAWEI TECH CO LTD