Primary and Secondary Beam Management for mmWave Reliability
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Solution Overview
Problem
In 5G wireless communication systems, the rapid change in channel environments due to the directivity characteristic of mmWave bands makes it challenging to maintain a stable wireless communication environment, leading to communication disruptions.
Innovation Solution
The implementation of a method that involves determining and using a secondary beam to compensate for the communication disabled state of a primary beam by identifying and configuring primary and secondary beams based on feedback information, allowing for adaptive communication state management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to increase signal gain in mmWave bands, then path loss is overcome and data rates are improved, but channel environment changes rapidly due to directivity characteristic making it difficult to ensure stable communication
Solution Approach 1:
The patent determines both primary and secondary beams in advance based on feedback information from the terminal before actual communication begins. This preliminary determination allows the system to prepare backup beam paths proactively, enabling rapid switching when the primary beam becomes unavailable due to rapid channel changes in mmWave bands.
Solution Approach 2:
The patent configures secondary beams as a preparatory measure to compensate for potential communication failures of primary beams. By having secondary beams ready in advance with different spatial directions, the system creates a buffer against channel degradation, ensuring continuous communication even when the primary beam is blocked or deteriorates.
2Reliability
If a single primary beam is used for communication, then device complexity is reduced, but communication disruptions occur when channel environment changes rapidly
Solution Approach 1:
The base station determines both primary and secondary beams in advance based on terminal feedback, preparing multiple beam options before communication begins. This preliminary preparation allows the system to switch to secondary beams when primary beams fail, maintaining communication continuity without requiring complex real-time beam switching mechanisms.
Solution Approach 2:
The patent implements dynamic beam switching capability where the base station can transition from using only the primary beam to utilizing secondary beams based on communication state changes. This dynamic adaptation allows the system to maintain simplicity during normal operation while gaining reliability when channel conditions deteriorate.
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system includes transmitting a UE capability information message to a base station, the UE capability information message including information for indicating that a multi-beam operation for multi-transmission and reception point (TRP) is supported and information for indicating that a simultaneous reception for different beams is supported, receiving a first control signal for first data on a first physical downlink control channel (PDCCH) associated with a first TRP, the first control signal transmitted by using a primary beam, and receiving second control signal for second data on a second PDCCH associated with a second TRP, the second control signal transmitted by using a secondary beam. The first data and the second data are received in same time resources.