Uplink Spatial Filter Acquisition via Shared Multi-BWP TCI Mapping
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Solution Overview
Problem
The configuration of Quasi Co-Location (QCL) parameters for multiple Bandwidth Parts (BWPs) in New Radio (NR) Rel-15 leads to significant signaling overhead and delay due to independent configuration for each Component Carrier (CC).
Innovation Solution
A method and apparatus that share TCI state mapping tables across multiple CCs, reducing redundant signaling by associating QCL information and TCI states across BWPs, using Radio Resource Control (RRC) and MAC-CE signaling to optimize TCI state configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QCL parameters are independently configured for each BWP in each CC, then each BWP has complete and accurate QCL configuration, but signaling overhead increases significantly
Solution Approach 1:
The patent merges QCL parameter configuration across multiple BWPs by introducing a unified TCI state list that is shared among different BWPs. Instead of independently configuring QCL parameters for each BWP, the system combines them into a common configuration structure, thereby reducing signaling overhead while maintaining configuration completeness through the unified approach.
Solution Approach 2:
The TCI state list is designed to serve multiple BWPs simultaneously, making it a universal configuration structure. This multi-functional TCI state list can be applied across different BWPs in a CC, allowing a single configuration to serve multiple purposes and reducing the overall signaling requirements while maintaining reliability.
2Reliability
If QCL parameters are independently configured for each BWP, then configuration accuracy is maintained, but configuration delay increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring a unified TCI state list that can be shared across multiple BWPs. This pre-established configuration structure allows for faster activation and switching between BWPs without requiring reconfiguration of QCL parameters, thereby reducing configuration delay while maintaining accuracy through the pre-defined unified structure.
3Adaptability or versatility
If TCI state lists are configured separately for each BWP, then each BWP has dedicated TCI states, but signaling overhead increases
Solution Approach 1:
The patent combines separate TCI state lists into a single shared TCI state list that serves multiple BWPs. This merging approach maintains adaptability by allowing the unified list to be selectively applied to different BWPs while significantly reducing signaling overhead compared to maintaining separate dedicated lists for each BWP.
Data Source
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AI summary
Information determination, acquisition and transmission methods, apparatuses and devices, and a storage medium are provided. The information determination method includes: acquiring a target parameter according to a downlink information element and second information, wherein the second information includes at least one of: timing advance information, a predetermined parameter, a number of repeated transmissions of an uplink target information element, a time-domain behavior parameter of the uplink target information element, a predetermined Component Carrier (CC) group, and a correspondence relationship between the downlink information element and an uplink target information element, and the target parameter is spatial transmitting filter information of an uplink target information element.