TCI State Notification for Beam Alignment in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, there is a challenge in how network side devices notify user equipment about the appropriate received beams for downlink information transmission, affecting beamforming gain and system performance.
Innovation Solution
The implementation of an electronic equipment with a processing circuit that receives information about candidate transmitted beams from user equipment, selects an appropriate transmitted beam, and determines a Transmission Configuration Indication (TCI) state to notify the user equipment, allowing it to determine the corresponding received beam for optimal data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the network side device transmits downlink information using beamforming technology, then the coverage range and edge throughput are improved, but the user equipment cannot determine the appropriate received beam without additional notification information
Solution Approach 1:
The patent introduces Transmission Configuration Indication (TCI) states as an intermediary mechanism. The network side device determines TCI states based on the selected transmitted beam and notifies the user equipment of these states. The user equipment then uses the TCI states to identify the appropriate received beam. This intermediary information structure resolves the contradiction by enabling beam selection without requiring direct transmission of complex beam configuration details.
Solution Approach 2:
The network side device performs preliminary determination of TCI states based on the selected transmitted beam before actual downlink information transmission. By pre-calculating and notifying the user equipment of the TCI states that correspond to the chosen transmitted beam, the system enables the user equipment to prepare the appropriate received beam in advance, ensuring seamless beam alignment without real-time negotiation overhead.
2Reliability
If the network side device notifies the user equipment about transmitted beam information, then the user equipment can select the appropriate received beam, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent transforms complex beam configuration information into simplified TCI state parameters. Instead of notifying the user equipment of detailed transmitted beam characteristics (such as beam direction, width, and power distribution), the network side device maps the selected transmitted beam to a compact TCI state identifier. This parameter transformation maintains reliable beam alignment while significantly reducing signaling overhead and simplifying the beam management complexity.
Solution Approach 2:
The TCI state acts as a simplified copy or representation of the transmitted beam configuration. Rather than transmitting the full beam configuration data, the network side device creates a condensed TCI state that captures the essential mapping relationship between transmitted and received beams. The user equipment uses this TCI state copy to determine the appropriate received beam without needing access to the complete original beam configuration, thereby reducing complexity while maintaining alignment accuracy.
Data Source
AI summary
An electronic device that includes a processing circuit configured to: receive information about a number N of candidate transmit beams from a user device, where N is an integer greater than 1; select from the N candidate transmit beams a transmit beam for sending downlink information to the user device; and determine, on the basis of the selected transmit beam, a transmission configuration indication (TCI) state, and send the TCI state to the user device. The electronic device, the wireless communication method and the computer readable storage medium enable a network-side device to notify the user device of the information about transmit beams.