Multi-Antenna Beam Pair Switching for Robust PDCCH Reception
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Solution Overview
Problem
Existing massive MIMO systems face issues with low transmission reliability due to blocking by moving objects and movement of User Equipment (UE), and the use of multiple beam pairs in different time resource pools leads to performance degradation and high signaling overheads or false alarms.
Innovation Solution
A method for multi-antenna transmission that involves receiving higher-layer signaling to dynamically configure multiple beam pairs in different radio resource pools, allowing flexible and robust transmission by using blind detection and higher-layer signaling to determine antenna port groups and vector groups for receiving beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of beam pairs are used to transmit PDCCH in different time resource pools, then transmission reliability is improved, but transmission performance degrades due to quality deterioration of one beam
Solution Approach 1:
The patent implements dynamic beam pair configuration where the network can flexibly select and switch between multiple beam pairs based on real-time channel conditions. The UE is configured with multiple beam pairs through higher-layer signaling, and the network dynamically indicates which beam pair to use for PDCCH transmission in different time resource pools, allowing adaptive response to beam quality deterioration while maintaining high transmission reliability
Solution Approach 2:
The patent changes the parameter of beam pair selection dynamically by introducing higher-layer signaling (MAC CE or RRC) to configure multiple beam pairs with different quality characteristics. The network can switch between beam pairs by changing the active beam pair indicator, thereby adapting to channel variations and avoiding performance degradation from single beam deterioration
2Adaptability or versatility
If MAC CE is used for flexible configuration of beam pairs, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by using MAC CE signaling only when beam pair reconfiguration is actually needed, rather than continuously. The MAC CE activates or deactivates specific beam pairs from a pre-configured set, providing flexible adaptability only when channel conditions require it, thereby reducing unnecessary signaling overhead while maintaining adaptability when needed
Solution Approach 2:
The patent makes the higher-layer signaling mechanism universal by designing it to handle multiple functions: configuring beam pairs, activating/deactivating beam pairs, and indicating which beam pair to use for PDCCH transmission. This multi-functional approach consolidates multiple control operations into a single signaling mechanism, reducing overall overhead compared to separate dedicated signaling for each function
3Adaptability or versatility
If physical layer signaling is used for flexible configuration of beam pairs, then adaptability is improved, but system performance suffers long-term damages due to false alarms
Solution Approach 1:
The patent introduces higher-layer signaling (MAC CE or RRC) as an intermediary between the physical layer and the beam pair configuration process. Instead of relying solely on physical layer signaling which is prone to false alarms, the higher-layer signaling provides a more reliable control mechanism that can confirm and validate beam pair configurations, thereby maintaining adaptability while protecting against long-term performance degradation from false alarms
Solution Approach 2:
The patent applies beforehand cushioning by using higher-layer signaling to pre-configure and validate beam pairs before they are activated for PDCCH transmission. This preliminary configuration and validation process creates a buffer against false alarms in physical layer signaling, as the higher-layer confirmation ensures that only properly validated beam pairs are activated, protecting system performance from long-term damages
Data Source
AI summary
The disclosure provides a method and a device for multi-antenna transmission in a base station and a User Equipment (UE). The UE, in turn, receives a first higher-layer signaling, monitors a first-type physical layer signaling in a first radio resource pool, and receives second downlink information in a second radio resource pool. The first higher-layer signaling is used for determining first information and second information, and the first information is used for multi-antenna related receiving in the first radio resource pool. The first-type physical layer signaling is detected, and the first-type physical layer signaling is used for multi-antenna related receiving in the second radio resource pool, or, the first-type physical layer signaling is not detected, and the second information is used for multi-antenna related receiving in the second radio resource pool. The second radio resource pool is related to the first radio resource pool.