RF Model Generation via Event-Triggered RSRP and C/I Distributions
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in building RF models due to the requirement for periodical measurements, which are not always provided by vendor equipment, limiting the applicability of network optimization tools like Ericsson Cell Optimizer (ECO).
Innovation Solution
A method implemented by a network node that configures cells to report event-triggered measurements, specifically Reference Signal Received Power (RSRP) and Carrier-To-Interferer (C/I) ratios, allowing the formation of distributions representing an RF model without relying on periodical measurements, and sends these to network management tools for optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodical measurement reports are used to build RF model, then measurement precision is improved, but device complexity increases and not all vendor equipment can provide this data
Solution Approach 1:
The patent uses event-triggered measurement reports as a substitute (copy) for periodical measurement reports. Instead of requiring the original periodical measurement mechanism which is complex and not universally supported, the invention creates an equivalent data structure from event-triggered reports that can be processed by optimization tools like ECO in the same way, thus resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent changes the triggering parameter of measurement reports from time-based (periodical) to event-based (RRC events). This parameter change allows the system to obtain measurement data without requiring complex periodical reporting mechanisms, making the solution compatible with all vendor equipment while maintaining the ability to build accurate RF models
2Measurement precision
If drive tests are performed to build RF model, then measurement precision is improved, but loss of time increases and cost increases
Solution Approach 1:
The patent enables the network to self-measure and self-report measurement data through normal user equipment connections and event-triggered reporting. Instead of requiring external drive test teams to physically test the network, the network automatically collects the necessary measurement data from connected UEs, eliminating the time-consuming and costly drive test process while maintaining measurement precision
Solution Approach 2:
The patent utilizes continuously occurring event-triggered measurement reports from normal network operations to build the RF model. Instead of requiring discrete, time-consuming drive test campaigns, the system continuously accumulates measurement data from regular network traffic and events, making the RF model building process ongoing and efficient without interrupting normal network service
3Loss of information
If all RRC measurements are reported in call traces, then measurement precision is improved, but loss of information decreases (more complete data)
Solution Approach 1:
The patent extracts only the necessary measurement information from event-triggered measurement reports that is required for RF model building, rather than requiring all possible RRC measurements to be reported. This selective extraction approach maintains measurement precision for the relevant parameters while reducing the overall data burden and device complexity requirements
Data Source
AI summary
A method and a network node (110) for providing an RF model of a telecommunications system (100) are disclosed. The network node (110) configures (A030) reporting of call traces indicative of: a first type of measurement event relating to serving cell with a first time-to-trigger value and a first threshold value, and a second type of measurement event relating to neighbouring cells with respect to the serving cell with a second time-to-trigger value and a second threshold value, wherein the first time-to-trigger value is greater than the second time-to-trigger value. The network node (110) receives (A090) a respective call trace representing a firstly reported measurement event of the first or second type for a connection in said each cell. Moreover, the network node (110) processes (A100) the respective call trace to extract an Reference Signal Received Power “RSRP” or to extract a Carrier-To-Interferer ratio “C/I”. Next, the network node (110) forms (A110, A120) a first distribution of RSRP and a second distribution of C/I, representing an RF model. The RF model is fed to a network management tool (140) for managing performance of the telecommunications system (100). A corresponding computer program and a carrier therefor are also disclosed.