Common Reference Signal Resources for Seamless BWP Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing bandwidth part (BWP) switching due to the lack of standardized reference signal resources across different BWPs, leading to inefficiencies in UE and network entity operations.
Innovation Solution
Implementing common reference signal resources that are shared across multiple BWPs within a component carrier, enabling seamless switching and measurement of reference signals during BWP transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate reference signal resources are configured for each BWP, then measurement precision for each BWP is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies universality by configuring reference signal resources at the component carrier level that can be shared across multiple BWPs. Instead of creating separate reference signal configurations for each BWP, the system uses a universal reference signal resource pool that serves all BWPs within the component carrier, reducing configuration complexity while maintaining measurement capability
Solution Approach 2:
The patent merges reference signal resources across different BWPs by consolidating them into common reference signal resource configurations. This combining approach allows UEs to use the same reference signal resources for measurements regardless of which BWP is currently active, thereby reducing the overall number of configurations needed
2Device complexity
If common reference signal resources are shared across multiple BWPs, then configuration complexity is reduced, but measurement precision during BWP switching may deteriorate
Solution Approach 1:
The patent segments reference signal resources into different types (e.g., CSI-RS, SSB) and purposes (channel state information, synchronization, measurement), allowing each segment to be optimized independently while sharing the common resource pool. This segmentation enables precise measurements for specific functions while maintaining overall configuration simplicity
Solution Approach 2:
The patent enables dynamic parameter adjustments for reference signals based on the active BWP context. While the resource pool is common, parameters such as frequency offsets, timing configurations, and measurement filters can be adapted according to the current BWP state, maintaining measurement precision despite resource sharing
3Adaptability or versatility
If reference signal resources are reconfigured during BWP switching, then adaptability to different BWPs is improved, but loss of time and signaling overhead increase
Solution Approach 1:
The patent prepares reference signal resource configurations in advance at the component carrier level, before BWP switching occurs. By pre-configuring universal reference signal resources that are valid across multiple BWPs, the system eliminates the need for time-consuming reconfiguration during actual BWP switching events, thereby reducing switching latency
4Reliability
If multiple separate reference signal configurations are maintained for different BWPs, then reliability of measurements across BWPs is improved, but productivity and spectral efficiency decrease
Solution Approach 1:
The patent establishes universal reference signal resource configurations that serve multiple BWPs within a component carrier. This universal approach improves spectral efficiency by reducing redundant configurations and enabling more flexible resource allocation, while maintaining measurement reliability through consistent reference signal availability across BWP transitions
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for common reference signal resources that are common across a first bandwidth part (BWP) and a second BWP within a component carrier. The UE may switch from the first BWP to the second BWP based at least in part on the configuration. The UE may transmit or measure, in the second BWP, reference signals that are in the common reference signal resources. Numerous other aspects are described.