Network-Controlled Repeater Beam Switching for Multi-TRP Links
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Solution Overview
Problem
Conventional repeaters struggle to adaptively adjust beams in multi-TRP environments, leading to interference and power waste in wireless communication systems.
Innovation Solution
A network-controlled repeater (NCR) with NCR-MT and NCR-Fwd components performs initial access procedures with multiple TRPs, adjusting backhaul link beams in different time durations to optimize signal forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional repeater uses a fixed direction for signal transmission, then the device complexity is reduced, but the adaptability to multi-TRP environments deteriorates
Solution Approach 1:
The repeater dynamically switches between different backhaul link beams based on time duration and TRP identification, transforming from a static fixed-direction system to an adaptive dynamic system that can adjust beam directions to match different TRPs, thereby resolving the contradiction between device complexity and adaptability
Solution Approach 2:
The repeater divides the backhaul link into multiple time durations, each associated with a specific TRP and beam configuration. This temporal segmentation allows the system to manage multiple beam directions without requiring simultaneous complex multi-beam hardware, thus maintaining relative simplicity while achieving adaptability
2Device complexity
If a repeater does not adaptively adjust beams in multi-TRP environments, then the device complexity is reduced, but harmful factors such as interference and power waste increase
Solution Approach 1:
The repeater receives side control information from the network that provides feedback about which TRP should be served in each time duration. This feedback mechanism enables the repeater to adjust its beam configuration appropriately, preventing interference and power waste without requiring complex autonomous decision-making capabilities
Solution Approach 2:
The network acts as an intermediary that coordinates between multiple TRPs and the repeater, providing scheduling information that tells the repeater which beam to use. This intermediary coordination simplifies the repeater's design while ensuring proper beam alignment and preventing harmful effects
Data Source
AI summary
In a wireless communication system, an NCR operation method and apparatus are provided. NCR includes NCR-MT and NCR-Fwd. The NCR-Fwd performs transmission and reception in a backhaul link (i.e., a link between the NCR-Fwd and a TRP) in different beam directions according to time resources. The NCR-MT receives side control information related to an access link operation from a plurality of TRPs. According to the backhaul link beam through which the NCR-Fwd transmits/receives, side control information associated with the corresponding beam is applied for the operation of the access link.