Cross-RAT Measurement Logging via Containerized Message Forwarding
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Solution Overview
Problem
Current 3GPP assumptions limit the reporting of user equipment (UE) measurement logs to the same Radio Access Technology (RAT) where they were collected, leading to loss or delay of measurements when the UE moves to a different RAT, causing inefficiencies in network optimization and resource wastage.
Innovation Solution
The method involves including measurement information from a first RAT in a message transmitted to a network node using a second RAT, with a decodable address field and container structure, allowing the measurement log to be forwarded to a receiving entity without decoding, enabling reporting across different RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reports measurement logs only in the same RAT where measurements were collected, then the measurement reporting procedure is simple and straightforward, but measurement logs are lost or delayed when the UE moves to a different RAT
Solution Approach 1:
The measurement log is segmented into multiple containers, each associated with a specific RAT. This allows the UE to maintain and report measurements from different RATs independently, preventing loss of measurement data when the UE moves between RATs while keeping the reporting mechanism manageable through structured organization.
Solution Approach 2:
The measurement logging function is designed to be universal across multiple RATs. The UE can collect and store measurement logs from different radio access technologies (LTE, WCDMA, GSM) in a unified logging mechanism, enabling the same logging functionality to serve multiple RATs simultaneously without requiring separate logging systems for each RAT.
2Loss of information
If the UE maintains measurement logs for multiple RATs simultaneously, then measurement data is preserved across RAT changes, but the UE resource consumption increases
Solution Approach 1:
The measurement logging mechanism is made dynamic by enabling the UE to activate or deactivate logging for specific RATs based on current network conditions and UE state. The UE can dynamically switch between logging different RATs, maintaining measurement data across RAT changes while optimizing resource usage by only logging when necessary rather than continuously maintaining all logs.
Solution Approach 2:
The system changes parameters such as logging activation status and RAT-specific configuration flags to control measurement logging behavior. By dynamically adjusting these parameters based on network conditions and UE capabilities, the system preserves measurement information across RAT changes while managing UE resource consumption through selective logging rather than continuous operation.
3Device complexity
If the measurement log is erased when a new logging request is received, then the UE maintains only one measurement log at a time simplifying management, but previous measurement data is lost
Solution Approach 1:
Instead of maintaining a single measurement log that gets erased and recreated, the system segments measurement logs into multiple independent containers, each associated with a specific RAT or logging instance. This segmentation allows the UE to preserve multiple measurement logs simultaneously without the complexity of managing a single log's erasure and recreation, preventing data loss while keeping individual log management simple.
Data Source
AI summary
Methods and arrangements for reporting of measurement information from a user equipment to a receiving entity via a network node comprised in a wireless communication system are disclosed. The embodiments relate to measurement logging function and immediate reporting function called Minimizing Drive Tests (MDT). The problem of reporting measurements in another RAT than in the RAT in which the measurements were collected in is addressed by a solution where a UE includes the measurement information collected in a first RAT in a message which is sent 36 to a network node in a second RAT. The network node then forwards 37 the message to a receiving entity without having to decode the actual content of the measurement log. This is done by introducing the receiving entity's IP address and/or similar addressing information in an address field in the message and using a container structure where the actual measurement log as reported by the UE is placed. The container need not be understandable by the network node and could be of a message format used in the RAT where the UE collected the measurement log. Thus, there is no need to reformat the measurement results.