LTE Measurement Context Synchronization During Inter-eNB Handover
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Solution Overview
Problem
In LTE systems, there is a lack of standardization in determining whether the network-side measurement context synchronization during inter-eNB switching or reestablishment is performed by the source or destination base station, leading to potential inconsistencies between the UE-side and network-side measurement contexts, which can affect subsequent control processes.
Innovation Solution
A method and device for processing the network-side measurement context between source and destination radio access network devices during inter-frequency switching or RRC connection reestablishment, where the source device transmits the measurement context to the destination device, and the destination device performs necessary exchange operations to maintain synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the source base station performs measurement context exchange operations, then the measurement context can be prepared in advance, but the source base station cannot determine whether the destination cell is at a different frequency, leading to potential synchronization issues
Solution Approach 1:
The patent applies preliminary action by having the source base station perform the measurement context exchange operation in advance, before the inter-frequency switching is actually executed. This allows the measurement context to be prepared and transferred beforehand, improving the efficiency and responsiveness of the switching process. The source base station initiates the exchange operation proactively, rather than waiting for confirmation of frequency difference.
2Difficulty of detecting and measuring
If the destination base station performs measurement context exchange operations, then the frequency difference can be determined, but the measurement context cannot be prepared in advance, leading to potential delays
Solution Approach 1:
The patent introduces an intermediary approach where the measurement context is transferred from the source base station to the destination base station in advance, but the actual exchange operation (associating measurement identities with measurement objects) is deferred until the destination base station confirms the frequency difference. This intermediary transfer allows the context data to be available when needed, while avoiding premature processing that could lead to errors.
3Device complexity
If no standard is specified for performing measurement context exchange operations, then device complexity is reduced, but inconsistencies between UE-side and network-side measurement contexts occur
Solution Approach 1:
The patent changes the parameter of who performs the exchange operation based on the frequency difference condition. When the destination base station determines that the destination cell is at a different frequency, it triggers the exchange operation. This parameter-based control (frequency difference as the triggering condition) ensures that the exchange operation is performed only when necessary, maintaining synchronization between UE-side and network-side measurement contexts while avoiding unnecessary complexity from universal standardization.
Data Source
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AI summary
A method and a device for processing a measurement context are provided by the present invention. The method includes: preparing for handover between radio access network devices in the Long Term Evolution (LTE) system (101); processing the network side measurement context between the radio access network devices (102). The application of the present invention can avoid the error resulted from the difference between the network side measurement context and the user equipment side measurement context, and can realize the interconnection between the radio access network devices of different manufacturers.