Beam Management in Radio Systems Using SRS and TCI States
Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing beam configurations for wireless devices, particularly in scenarios requiring adaptive bandwidth and resource allocation across multiple carriers.
Innovation Solution
The implementation of advanced beam management techniques, including codebook-based and non-codebook-based methods, that allow for dynamic configuration of uplink transmissions in New Radio (NR) networks. These techniques enable wireless devices to adaptively select the most suitable beam and bandwidth parts based on real-time traffic conditions and network requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If codebook-based beam management is used, then beam selection accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The beam management process is segmented into codebook-based and non-codebook-based approaches. The codebook is divided into multiple codebook groups, each associated with specific bandwidth parts. This segmentation allows the device to select appropriate codebooks based on traffic conditions and bandwidth requirements, improving beam selection accuracy while managing complexity through structured organization.
Solution Approach 2:
The system dynamically switches between codebook-based and non-codebook-based beam management methods based on real-time traffic conditions, bandwidth part configurations, and network requirements. This dynamic adaptation allows the device to optimize beam selection accuracy for given conditions while controlling complexity by using simpler non-codebook methods when appropriate.
2Device complexity
If non-codebook-based beam management is used, then device complexity is reduced, but beam selection flexibility and adaptability decrease
Solution Approach 1:
The system implements a universal beam management framework that supports both codebook-based and non-codebook-based methods within the same device architecture. This multi-functionality allows the device to handle diverse beam management requirements across different bandwidth parts and traffic conditions, maintaining flexibility while managing complexity through a unified approach.
Solution Approach 2:
The system changes operational parameters by switching between codebook-based and non-codebook-based beam management modes based on traffic conditions, bandwidth part configurations, and network requirements. This parameter change enables the device to adapt beam selection flexibility to specific conditions while controlling complexity by using simpler non-codebook methods when appropriate.
3Adaptability or versatility
If multiple bandwidth parts are configured, then resource allocation flexibility is improved, but configuration complexity and management overhead increase
Solution Approach 1:
The bandwidth spectrum is segmented into multiple bandwidth parts, each with specific characteristics and associated codebook groups. This segmentation allows flexible resource allocation by enabling the device to activate only the necessary bandwidth parts for current traffic conditions, improving resource allocation flexibility while managing configuration complexity through structured organization of bandwidth parts and their associated parameters.
4Measurement precision
If codebook groups are associated with specific bandwidth parts, then beam management precision is improved, but signaling overhead and configuration complexity increase
Solution Approach 1:
The codebook is segmented into multiple codebook groups, each associated with specific bandwidth parts. This segmentation enables precise beam management by allowing the device to select the appropriate codebook group for the active bandwidth part, improving beam management precision. The association is configured through efficient signaling that references the segmented structure, reducing overall signaling overhead compared to configuring separate codebooks for each bandwidth part.
Data Source
AI summary
A wireless device receives, from a base station, one or more messages comprising configuration parameters indicating: a sounding reference signal (SRS) resource set; a plurality of reference signals (RSs); and an uplink transmission configuration indication (TCI) state comprising a configuration of one or more RSs of the plurality of RSs. The wireless device receives a downlink control information comprising an SRS resource indicator (SRI) and an uplink TCI indicator (UL-TCI), where: the SRI indicates one or more SRS resources of the SRS resource set; and the UL-TCI indicates an uplink transmission configuration indication state. In response to the SRI being equal to a predefined value, the wireless device determines an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set. The wireless device transmits, via a physical uplink shared channel, a transport block with the uplink spatial domain transmission filter.