Current-PLMN RACH Reporting with Selective Data Discarding

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Solution Overview

Problem

Existing LTE and NR wireless communication systems face inefficiencies in RACH (Random Access Channel) reporting and resource utilization due to dynamic changes in network configurations, leading to increased call setup and handover delays, collisions, and suboptimal resource allocation.

Innovation Solution

Improved RACH reporting methods that include generating RACH reports specific to the current PLMN (Public Land Mobile Network) the wireless device is registered with, while discarding information related to previous PLMNs, enhancing memory efficiency and resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If RACH reports for all PLMNs are stored in wireless device memory, then comprehensive RACH information is available for analysis, but memory resources are wasted and reporting efficiency decreases

Engineering Contradiction:

ImproveRACH reporting completenessVSAvoidmemory resource utilization

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies the discarding and recovering principle by selectively discarding RACH information associated with non-current PLMNs from wireless device memory. The network node requests RACH reports only for the current PLMN, allowing the device to discard historical RACH data for other PLMNs, thereby recovering memory resources while maintaining reporting effectiveness for the active network

Inventive Principle:

Principle #34Discarding and recovering

2Loss of information

If RACH information is retained for previous PLMNs, then historical access patterns are preserved for network optimization, but reporting efficiency and resource utilization deteriorate

Engineering Contradiction:

ImproveRACH history preservationVSAvoidRACH reporting efficiency

Core Design Contradiction:

Loss of informationVSProductivity

Solution Approach 1:

The patent applies the extraction principle by isolating and retrieving only the relevant RACH information for the current PLMN from the wireless device's stored data. The network node specifically requests RACH reports for the current PLMN, extracting only the necessary historical access patterns needed for optimization while leaving other data undisclosed and unretrieved

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If RACH reports are generated for multiple PLMNs, then comprehensive network analysis is enabled, but collision probability and call setup delays increase

Engineering Contradiction:

Improvenetwork optimization accuracyVSAvoidcall setup delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies the local quality principle by focusing RACH reporting efforts on the local context of the current PLMN only. Rather than uniformly reporting for all PLMNs, the system tailors the reporting scope to the specific current network, improving the quality and relevance of optimization data while reducing the time overhead associated with processing multiple PLMN reports

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP4221422B1Methods providing information messages including RACH reports and related wireless devices

Publication Date: 2025.10.08 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

A wireless device registers (1501) with a first PLMN having a first PLMN identity. A first plurality of RA procedures is performed (1501) while registered with the first PLMN. First information related to the first plurality of RA procedures is stored (1509). The wireless device registers (1511) with a second PLMN after registering with the first PLMN and performing the first plurality of RA procedures. A second plurality of RA procedures is performed (1515) while registered with the second PLMN. Second information related to the second plurality of RA procedures is stored (1519). A RACH report request is received (1521) from the second PLMN. An information message is transmitted (1525) to the second PLMN responsive to the RACH report request. The information message includes a plurality of RACH reports corresponding to the second plurality of RA procedures and omits RACH reports corresponding to the first plurality of RA procedures.