Beam Management for Wireless Signal Reception
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beam reception for multiple physical downlink control channels (PDCCHs) and physical downlink shared channels (PDSCHs, leading to increased payload size and latency in signal transmission and reception.
Innovation Solution
A method involving user equipment (UE) that receives a beam reference signal, reports measurement results, and adjusts reception beams based on control information from the base station, prioritizing beam sets and configuring resources for efficient PDCCH and PDSCH reception, including the use of quasi-colocated resources and time gaps to manage beam switching latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PDCCHs are transmitted through different symbols in a specific time domain, then the system can support multiple beam reception scenarios, but the payload size increases and decoding complexity increases
Solution Approach 1:
The patent segments the beam management process by configuring separate Rx beams for different PDCCH occasions. Each PDCCH can be associated with a specific Rx beam index, allowing the UE to selectively apply different reception beams to different control channel occasions. This segmentation reduces the overall decoding complexity by enabling targeted beam processing rather than exhaustive decoding across all possible beam combinations.
Solution Approach 2:
The patent implements preliminary beam configuration through higher-layer signaling (RRC or MAC CE) that pre-configures a set of Rx beams and their associations with PDCCH occasions. This preliminary action establishes the beam mapping before actual PDCCH reception, so the UE does not need to perform complex real-time beam selection and decoding for each PDCCH occasion, thereby reducing instantaneous decoding complexity.
2Adaptability or versatility
If beam switching is performed between different PDCCH receptions, then the system can adapt to different spatial directions, but beam switching latency increases
Solution Approach 1:
The patent pre-configures multiple Rx beams and their associations with different PDCCH occasions through higher-layer signaling. By establishing the beam mapping in advance, the UE can switch between pre-defined beams without performing complex real-time beam selection, thereby reducing beam switching latency while maintaining spatial adaptability.
Solution Approach 2:
The patent enables dynamic Rx beam switching by allowing the network to indicate different Rx beam indices for different PDCCH occasions through DCI or other downlink signaling. This dynamic adaptation allows the UE to switch between pre-configured beams based on current spatial requirements, achieving both adaptability and reduced switching latency compared to static beam configurations.
3Measurement precision
If control information is configured for each specific resource for multiple signals, then beam reception accuracy is improved, but the payload size and signaling overhead increase
Solution Approach 1:
The patent applies partial action by configuring Rx beam information selectively for specific PDCCH occasions rather than for all possible resources. The network can indicate Rx beam indices only when beam-specific reception is required, avoiding the transmission of redundant beam control information for occasions where default beam behavior suffices. This reduces payload size while maintaining beam reception accuracy where needed.
Solution Approach 2:
The patent creates a universal beam management framework where a single set of higher-layer configured Rx beams can serve multiple PDCCH occasions. The same pre-configured beam set can be reused across different time-frequency resources, reducing the need for separate beam configurations for each resource and thereby reducing overall signaling overhead while maintaining reception accuracy.
Data Source
AI summary
The present specification provides a method for transmitting/receiving signals through beams in a wireless communication system. The signal transmission/reception method performed by a terminal, in the present specification, may comprise the steps of: receiving a beam reference signal used in beam management from an eNB via a first Rx beam; if beam reporting is triggered, reporting to the eNB a measurement result based on the beam reference signal; receiving, from the eNB, control information related to the determination of a second Rx beam for receiving a particular signal; and receiving the particular signal via the second Rx beam on the basis of the received control information.