Measurement Gap Configuration for Carrier Aggregation
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Solution Overview
Problem
In LTE-Advanced systems with carrier aggregation, the network lacks a clear method to configure measurement gaps for multiple component carriers, leading to packet scheduling problems and transmission interruptions due to undefined measurement functionality for UEs supporting multiple carriers.
Innovation Solution
The network configures measurement gaps for UEs using various methods such as group-based, staggered, independent, single, or common configurations across multiple component carriers, including specific gap lengths and offsets, to optimize inter-frequency/inter-RAT measurements without interrupting data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gaps are configured for multiple component carriers in LTE-Advanced systems, then inter-frequency/inter-RAT measurement capability is improved, but packet scheduling problems and transmission interruptions occur due to undefined measurement functionality
Solution Approach 1:
The patent segments the measurement gap configuration into separate entries for each component carrier. Each component carrier has its own measurement gap configuration with independent parameters (measurement gap length, offset, pattern). This segmentation allows the network to configure measurement gaps for multiple carriers without causing scheduling conflicts, as each carrier's measurement activities are independently managed. The segmentation resolves the contradiction by enabling precise measurement control for each carrier while maintaining reliable packet scheduling through clear separation of measurement and transmission time windows.
Solution Approach 2:
The patent introduces dynamic measurement gap configuration where the network can adjust measurement gap parameters (length, offset, pattern) based on real-time traffic conditions and measurement needs. The system dynamically determines which component carriers require measurement gaps and configures them accordingly, rather than using static predefined configurations. This dynamic approach allows the system to optimize between measurement capability and transmission reliability by adapting the measurement gap configuration to current operational requirements.
2Adaptability or versatility
If measurement gaps are configured for multiple component carriers, then measurement functionality is enhanced, but transmission/reception performance is downgraded due to prohibited uplink/downlink transmissions during measurement gaps
Solution Approach 1:
The patent segments the measurement gap configuration into separate entries for each component carrier, allowing independent configuration of measurement gaps for different carriers. This segmentation enables the system to perform measurements on multiple carriers simultaneously without interfering with each other, as each carrier has its own dedicated measurement time windows. The segmentation resolves the contradiction by maintaining measurement versatility while preserving transmission performance through clear temporal separation of measurement and transmission activities.
Solution Approach 2:
The patent applies preliminary action by configuring measurement gaps in advance for specific component carriers based on predicted measurement needs and traffic patterns. The network determines which carriers require measurement gaps and configures them beforehand, allowing the UE to prepare measurement routines and schedule transmissions accordingly. This preliminary configuration enables the system to optimize the balance between measurement capability and transmission performance by anticipating and preparing for measurement activities before they impact ongoing communications.
3Device complexity
If a single measurement gap configuration is used for all component carriers, then configuration simplicity is maintained, but packet scheduling problems arise in LTE-Advanced systems with multiple carriers
Solution Approach 1:
The patent segments the measurement gap configuration into separate, carrier-specific entries rather than using a single unified configuration. Each component carrier has its own measurement gap configuration with independent parameters (length, offset, pattern), allowing the network to optimize measurement gaps for each carrier's specific characteristics and traffic patterns. This segmentation resolves the contradiction by maintaining configuration clarity and simplicity through structured organization while ensuring packet scheduling reliability through carrier-specific optimization that prevents scheduling conflicts.
Solution Approach 2:
The patent applies local quality by configuring measurement gaps with carrier-specific parameters tailored to each component carrier's characteristics. Instead of using uniform measurement gap settings for all carriers, the system adjusts gap length, offset, and pattern according to each carrier's frequency, bandwidth, and traffic conditions. This local quality approach resolves the contradiction by maintaining configuration simplicity through standardized template-based configuration while ensuring packet scheduling reliability through customized parameters for each carrier.
Data Source
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AI summary
A method of handling measurement gap configuration for a network in a wireless communication system comprising a mobile device capable of receiving and/or transmitting on a plurality of component carriers is disclosed. The method comprises configuring at least a measurement gap configuration each for at least a component carrier of the plurality of component carriers, to the mobile device.