Measurement Gap Handling in Wireless Dual Connectivity
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Solution Overview
Problem
In wireless communication systems with dual connectivity, there is a challenge in handling measurement gaps, where user equipment (UE) needs to perform measurements on multiple carriers while receiving data from both master and secondary base stations, leading to potential data loss and transmission interruptions.
Innovation Solution
A communication device and method that connects to both master and secondary base stations, receives measurement gap configurations, determines measurement gap locations based on system time, and performs measurements within these gaps, ensuring seamless data transmission and reception across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gaps are configured for UE to perform measurements on multiple carriers, then measurement capability is improved, but data transmission continuity deteriorates due to potential data loss during gap periods
Solution Approach 1:
The network side determines measurement gap configurations and locations in advance before actual measurements are performed. The MBS and SBS coordinate to pre-arrange measurement gap schedules, ensuring that data transmissions are planned around these predetermined gaps, thus preventing data loss while enabling measurements.
Solution Approach 2:
The MBS acts as an intermediary between the UE and SBS for measurement gap coordination. When the SBS needs to configure measurement gaps, it communicates with the MBS first, which then coordinates the gap scheduling with the UE's data transmissions, ensuring that measurement activities do not conflict with ongoing data communications.
2Measurement precision
If measurement gaps are scheduled for UE to switch between carriers, then carrier measurement accuracy is improved, but transmission efficiency deteriorates due to interruptions
Solution Approach 1:
The measurement gap configuration is made dynamic rather than fixed. The network can adjust measurement gap locations, durations, and frequencies based on current transmission requirements and measurement needs. This allows the system to optimize the balance between measurement accuracy and transmission efficiency in real-time conditions.
Solution Approach 2:
Measurements are performed in periodic measurement gaps rather than continuously. The UE switches to measurement mode during scheduled periodic intervals and returns to normal communication mode between gaps, allowing transmission to continue efficiently during non-gap periods while still achieving accurate periodic measurements.
3Adaptability or versatility
If UE performs measurements on first carrier during measurement gaps configured by SBS, then measurement function is improved, but coordination complexity with MBS increases
Solution Approach 1:
The measurement gap configuration functions of the MBS and SBS are merged into a coordinated system. Instead of each base station independently configuring measurement gaps (which would create conflicts), the MBS and SBS work together through standardized interfaces to establish unified measurement gap schedules that satisfy both carriers' requirements.
Solution Approach 2:
The measurement gap configuration mechanism is designed to be universal, working seamlessly whether measurements are performed on the first carrier, second carrier, or both. The standardized coordination protocol between MBS and SBS creates a multi-functional system that can handle various measurement scenarios without requiring separate complex procedures for each case.
Data Source
AI summary
A communication device of handling a measurement gap comprises a storage device and a processing circuit, coupled to the storage device. The storage device stores, and the processing circuit is configured to execute instructions of: connecting to a master base station (MBS); connecting to a secondary base station (SBS), while connecting to the MBS; receiving a first measurement gap configuration configuring a first plurality of measurement gaps for the communication device, from the SBS; determining a first plurality of locations of the first plurality of measurement gaps according to a first system time acquired from the SBS; and performing at least one first measurement on a first carrier in the first plurality of measurement gaps according to the first plurality of locations.