Dynamic Beam Configuration for RedCap Repeated Downlink Transmissions
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Solution Overview
Problem
The 5G NR system struggles to meet the requirements of reduced capability user equipment (RedCap UE) due to limited capabilities, resulting in coverage loss and inefficiencies in beam management for terminals with strong mobility, particularly in scenarios requiring higher data rates and power savings.
Innovation Solution
A beam determining method that involves dynamic beam switching during repeated transmissions to ensure the transmitting and receiving beams match the dynamically changing channel conditions, optimizing beam configuration information to enhance coverage and reduce delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated transmissions are used to enhance coverage for RedCap UE, then coverage is improved, but transmission delay increases and beam alignment becomes ineffective for mobile terminals
Solution Approach 1:
The patent applies dynamics by making the beam configuration dynamic rather than static. The network device determines different beam configurations for different repeated transmissions based on updated channel state information. This allows the beam to adapt to channel changes during the repeated transmission process, maintaining beam alignment effectiveness for mobile terminals while preserving the coverage enhancement benefits of repeated transmissions.
Solution Approach 2:
The patent changes the beam configuration parameter across repeated transmissions. Instead of using the same beam configuration for all N repeated transmissions, the network device updates the beam configuration based on current channel conditions, thereby optimizing both coverage and transmission efficiency for mobile RedCap UE.
2Device complexity
If a single beam configuration is used for all repeated transmissions, then device complexity is reduced, but transmission efficiency decreases for mobile terminals with changing channel conditions
Solution Approach 1:
The patent changes the beam configuration parameter across repeated transmissions. Instead of using the same beam configuration for all N repeated transmissions, the network device updates the beam configuration based on current channel conditions, thereby optimizing both coverage and transmission efficiency for mobile RedCap UE.
3Ease of manufacture
If RedCap UE uses limited bandwidth or fewer receiving antennas to reduce cost, then device cost is reduced, but coverage capability deteriorates
Solution Approach 1:
The patent optimizes beam configuration parameters to compensate for the limited capabilities of RedCap UE. By dynamically adjusting beam configurations based on channel conditions, the system maximizes the coverage capability of terminals with restricted bandwidth and antenna resources, thereby improving coverage without increasing device cost.
Data Source
AI summary
A beam determining method is applied to a network device, and includes: determining beam configuration information, wherein the beam configuration information at least includes parameters configured to indicate a receiving beam corresponding to at least one of N repeated transmissions of a downlink channel, where N is a natural number; and determining a transmitting beam corresponding to the at least one of the N repeated transmissions according to beam parameters corresponding to the at least one of the N repeated transmissions of the downlink channel.