Cellular-WLAN Aggregation Data Handling Suspension
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Solution Overview
Problem
In LTE systems, the existing methods for handling cellular-WLAN aggregation result in unnecessary data recovery and signaling overhead when RRC connections are suspended or resumed, leading to wastage of radio resources and battery power due to unnecessary PDCP status reports.
Innovation Solution
A communication device that establishes an RRC connection, configures cellular-WLAN aggregation, enables data handling for a radio bearer, and upon receiving an RRCConnectionRelease or MobilityFromEUTRACommand message, disables data handling and avoids performing data recovery, thereby optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data recovery is performed upon receiving RRCConnectionRelease or MobilityFromEUTRACommand messages in cellular-WLAN aggregation, then data integrity is maintained, but signaling overhead and battery power consumption increase
Solution Approach 1:
The patent changes the parameter of data recovery execution by introducing conditional logic that checks whether the radio bearer is actually configured for cellular-WLAN aggregation before performing data recovery. This parameter change from unconditional to conditional execution reduces unnecessary PDCP status report transmissions, thereby reducing signaling overhead and battery power consumption while maintaining data integrity when CWA is actively configured.
2Reliability
If PDCP status reports are transmitted during RRC connection suspension/resume, then data recovery is ensured, but radio resources are wasted
Solution Approach 1:
The patent modifies the execution parameter of PDCP status report transmission by adding a conditional check for CWA configuration status. When the radio bearer is not configured for cellular-WLAN aggregation, the PDCP status report transmission is skipped, preventing waste of radio resources. This selective parameter change ensures data recovery only when necessary, eliminating redundant resource consumption.
3Reliability
If data handling is continuously monitored and recovered upon RRC messages, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent simplifies the data handling logic by changing the parameter of recovery execution from a complex continuous monitoring approach to a simple conditional check based on CWA configuration status. The processing circuit only needs to check whether CWA is configured before performing data recovery, reducing the complexity of data handling mechanisms while maintaining communication reliability through targeted recovery actions.
Data Source
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AI summary
A communication device for handling a cellular-wireless local area network (cellular-WLAN) aggregation (CWA) comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise establishing a radio resource control (RRC) connection to a cellular network; receiving a first RRC message configuring a CWA for a radio bearer from the cellular network on the RRC connection; enabling data handling for the radio bearer in response to the first RRC message; receiving an RRCConnectionRelease message or a MobilityFromEUTRACommand message on the RRC connection from the cellular network; and disabling the data handling for the radio bearer and not performing data recovery for the radio bearer, in response to the RRCConnectionRelease message or the MobilityFromEUTRACommand message.