Multi-Beam Operation Control Message for 5G NR Latency Reduction
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Solution Overview
Problem
Existing beam management procedures are inefficient in indicating and updating common beams for multiple channels and component carriers, leading to higher latency and overhead in 5G New Radio (NR) systems, particularly in scenarios where a common beam is used for both downlink and uplink data and control transmissions across multiple component carriers.
Innovation Solution
The method involves transmitting control messages from a network controller to a communication device to share quasi co-location (QCL) information or spatial filter information for multiple target elements, and to map transmission configuration indication (TCI) states to codepoints, allowing the device to use common beams for multiple channels and component carriers in a single layer-1 or layer-2 control message, reducing the need for multiple control messages and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If separate beam management procedures are used for each channel and component carrier, then beam management precision is maintained, but latency and signaling overhead increase
Solution Approach 1:
The patent combines beam management for multiple channels and component carriers into a unified procedure. The network controller determines a common beam for uplink channels (PUSCH, PUCCH, SRS) and applies it across multiple component carriers simultaneously, reducing the number of separate beam management procedures from multiple individual operations to a single consolidated operation, thereby reducing latency and signaling overhead while maintaining beam management precision through the unified beam determination process
Solution Approach 2:
The patent creates a universal beam management mechanism that handles multiple channels and component carriers through a single beam determination and indication process. The common beam determined by the network controller serves multiple functions: it is applied to PUSCH, PUCCH, and SRS channels across multiple component carriers, eliminating the need for separate beam management procedures for each channel and carrier, thus achieving multi-functionality while reducing latency
2Loss of information
If multiple control messages are transmitted for beam management, then beam indication accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple beam indication operations into a single control message. Instead of transmitting separate control messages for beam management of each channel and component carrier, the network controller transmits one unified control message containing a single beam indication that applies to all uplink channels (PUSCH, PUCCH, SRS) across multiple component carriers, thereby reducing signaling overhead from multiple messages to one message while maintaining beam indication accuracy through the comprehensive nature of the unified indication
Solution Approach 2:
The control message in the patent serves multiple functions simultaneously: it provides beam indication for PUSCH, PUCCH, and SRS channels, and applies to multiple component carriers. This multi-functional control message replaces what would traditionally require multiple separate control messages, reducing signaling overhead while ensuring accurate beam indication across all channels and carriers through the universal applicability of the single message
Data Source
AI summary
A network controller transmits to a communication device a first control message comprising a first indicator indicating a plurality of target elements, wherein the plurality of target elements instruct the communication device to share a plurality of quasi co-location (QCL) information or a plurality of spatial filter information when receiving and/or transmitting on the plurality of target elements.