L2 CLI Measurement Resources for 5G NR Interference Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved methods and systems to manage cross-link interference (CLI) in wireless communication systems, particularly in 5G New Radio (NR), to enhance communication efficiency and reliability.
Innovation Solution
The implementation of semi-persistent (SP) or periodic (P) cross-link interference (CLI) measurement resources, including zero power sounding reference signals (ZP SRS), channel state information (CSI) interference measurements (CSI IM), and non-zero power (NZP) CSI reference signals (CSI RS), for layer 2 (L2) CLI measurement and reporting, facilitated by network entities and user equipment (UE) to optimize CLI management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross-link interference measurement resources are configured for L2 CLI measurement, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments CLI measurement resources into multiple types (ZP SRS, CSI IM resources, NZP CSI RS) that can be independently configured and activated. This segmentation allows the system to selectively enable only the necessary measurement resource types for specific CLI scenarios, improving reliability where needed while avoiding unnecessary complexity in other scenarios.
Solution Approach 2:
The patent implements dynamic activation and deactivation of CLI measurement resources through MAC CE signaling. The network can dynamically enable or disable specific measurement resource types based on current CLI conditions, allowing the system to adapt to changing interference environments without permanently increasing device complexity. This dynamic approach ensures reliability when CLI is present while maintaining simplicity when it is not.
2Measurement precision
If multiple types of CLI measurement resources are configured, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides CLI measurement resources into distinct types (ZP SRS for uplink interference, CSI IM for downlink interference, NZP CSI RS for reference signal measurements) that can be independently configured. Each type targets specific interference scenarios, improving measurement precision for particular CLI conditions while allowing the device to avoid implementing all types simultaneously, thus managing complexity.
Solution Approach 2:
Different measurement resource types are optimized for specific local conditions: ZP SRS for uplink CLI scenarios, CSI IM for downlink CLI scenarios, and NZP CSI RS for specific reference signal measurements. This local optimization ensures that each measurement resource type provides precise measurements for its intended purpose while the device only needs to implement the types relevant to its operating conditions.
3Productivity
If semi-persistent or periodic CLI measurement resources are used, then productivity is improved, but loss of time increases
Solution Approach 1:
The patent implements periodic CLI measurement resources that are activated at specific intervals rather than continuously. This periodic action allows the system to maintain communication efficiency by performing measurements only when necessary, while the semi-persistent nature ensures that measurements are available when needed without requiring continuous monitoring, thus balancing productivity with time loss.
Solution Approach 2:
The network configures CLI measurement resources in advance with predetermined periodicity and activation conditions. This preliminary configuration allows the UE to prepare measurement capabilities ahead of time, so when CLI measurements are needed, they can be performed efficiently without last-minute setup delays, improving productivity while managing time loss through advance preparation.
Data Source
AI summary
Apparatus, methods, and computer program products for cross-link interference (CLI) measurements are provided. An example method may include receiving, from a second network entity, a configuration of a set of semi-persistent (SP) or periodic (P) (SP/P) CLI measurement resources for layer 2 (L2) CLI measurement, where the set of SP/P CLI measurement resources are associated with one or more measurement resource types including at least one of: a zero power sounding reference signal (ZP SRS), a channel state information (CSI) interference measurement (CSI IM) resource, a non-zero power (NZP) CSI reference signal (CSI RS), or a combination of the NZP CSI RS and CSI IM, where the one or more measurement resource types are tied to at least one respective CLI reporting metric or not tied to the respective CLI reporting metric.