Implicit Beam Indication with Preconfigured PCI Beam States
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in configuring and managing user equipment (UE) with multiple candidate cells, leading to increased cell switching latency and reduced reliability due to the need for explicit beam configuration signaling after UE is configured with physical cell identifiers (PCIs).
Innovation Solution
Implementing techniques for enhanced implicit beam configuration indications, where UE is pre-configured with beam configurations for candidate PCIs, allowing it to apply these configurations based on an implicit indication of selected subsets, thereby reducing the need for additional signaling and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit beam configuration signaling is used after UE is configured with PCIs, then beam configuration reliability is improved, but cell switching latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam configurations for candidate PCIs before the UE actually needs to switch cells. The network provides beam configuration information in advance along with candidate PCI indications, so that when cell switching occurs, the UE already has the beam configuration ready to apply immediately, eliminating the delay caused by post-configuration signaling.
2Loss of time
If pre-configuration of beam configurations for candidate PCIs is implemented, then cell switching latency is reduced, but device complexity increases
Solution Approach 1:
The patent applies universality by creating a unified configuration framework where beam configurations are associated with candidate PCIs in a standardized manner. The same configuration mechanism serves multiple purposes: it provides candidate cell information, pre-configures beam parameters, and enables rapid switching, reducing the need for separate dedicated procedures and thereby managing complexity.
3Measurement precision
If additional signaling for beam configuration is transmitted, then beam configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies merging by combining beam configuration information with candidate PCI indications into a single signaling message. Instead of transmitting separate signaling for candidate cell selection and separate signaling for beam configuration, the patent integrates both pieces of information together, reducing the total amount of signaling overhead while maintaining complete and accurate beam configuration data.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a beam configuration for each physical cell identifier (PCI) of a set of candidate PCIs. A beam configuration for a PCI may include, for example, transmission configuration indicator (TCI) states for downlink channels and reference signals or spatial relations for uplink channels and reference signals. The UE may receive an indication of a selected subset of PCIs of the set of candidate PCIs. The UE may apply the beam configuration for each PCI of the selected subset of PCIs based on the indication of the selected subset of PCIs. The UE may then communicate according to the beam configurations for the selected subset of PCIs.