Cross Link Interference Measurement Using RSSI Threshold Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cross link interference (CLI) in wireless communication systems, particularly in 5G New Radio (NR) networks, poses a challenge due to increased demand for mobile broadband access, leading to degraded performance and reliability as multiple user equipment (UEs) share network resources, with existing measurement methods like RSRP being complex and time-consuming.
Innovation Solution
A method for measuring CLI using receive strength signal indicator (RSSI) and reference signal received power (RSRP) values, where UEs measure RSSI values on configured resources, exceeding a threshold triggers RSRP measurements on specific resources, reducing overhead by focusing RSRP measurements on resources with high RSSI values, and reporting these to the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSRP measurements are performed on all CLI measurement resources, then measurement precision is improved, but device complexity and processing time increase
Solution Approach 1:
The patent segments the CLI measurement process into two distinct stages: first performing RSSI measurements on all CLI measurement resources to identify interfering resources, then performing RSRP measurements only on the subset of resources where RSSI exceeds the threshold. This segmentation reduces the overall measurement complexity while maintaining accuracy on critical interfering resources.
Solution Approach 2:
Instead of performing RSRP measurements on all CLI measurement resources (excessive action), the patent applies partial action by performing RSRP measurements only on the subset of resources where RSSI values exceed the threshold. This partial measurement approach reduces processing complexity while focusing computational effort where it is most needed - on resources with actual interference.
2Measurement precision
If RSRP measurements are performed on all CLI measurement resources, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The measurement process is divided into two time-efficient stages: rapid RSSI measurement on all resources followed by selective RSRP measurement only on interfering resources. This segmentation significantly reduces total measurement time compared to performing RSRP measurements on all resources, while maintaining precision on the critical interfering resources.
Solution Approach 2:
The patent performs preliminary RSSI measurements on all CLI measurement resources before performing RSRP measurements. This preliminary action identifies which resources actually have interference, allowing the system to skip unnecessary RSRP measurements on non-interfering resources and thus reduce total measurement time.
3Measurement precision
If RSRP measurements are performed on all CLI measurement resources, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent applies partial action by performing energy-intensive RSRP measurements only on the subset of CLI measurement resources where RSSI exceeds the threshold, rather than on all resources. This significantly reduces battery power consumption while maintaining measurement precision on the interfering resources that actually matter.
Solution Approach 2:
The system performs low-energy preliminary RSSI measurements first to identify interfering resources, then performs high-energy RSRP measurements only on those identified resources. This preliminary filtering action minimizes overall energy consumption by avoiding unnecessary high-energy measurements on non-interfering resources.
4Device complexity
If RSSI measurements are used for CLI measurement, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent segments the measurement approach by using simple RSSI measurements for initial screening of all CLI measurement resources, then applying more precise RSRP measurements only on the subset of resources where RSSI indicates actual interference. This segmentation allows the system to leverage the simplicity of RSSI while achieving the precision of RSRP where needed.
Solution Approach 2:
RSSI measurements serve as an intermediary step between the simple but imprecise initial assessment and the precise but complex RSRP measurement. The RSSI measurement acts as a filter that identifies which resources require the more precise RSRP measurement, thus mediating between complexity and precision requirements.
Data Source
AI summary
A user equipment (UE) may receive a resource configuration indicating cross link interference (CLI) measurement resources, measure receive strength signal indicator (RSSI) values on the CLI measurement resources, respectively, and determine whether one or more RSSI values of the multiple of RSSI values exceed an RSSI threshold, the one or more RSSI values being respectively associated with one or more CLI measurement resources of the CLI measurement resources. The UE may measure at least one reference signal received power (RSRP) value respectively on at least one CLI measurement resource of the one or more CLI measurement resources in response to determining that the one or more RSSI values exceed the RSSI threshold. The UE may transmit an RSRP measurement report, the RSRP measurement report including the at least one RSRP value and at least one resource index respectively indicating the at least one CLI measurement resource.