Measurement Gap Control for TDD Carrier Aggregation
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Solution Overview
Problem
In mobile communication systems, particularly in LTE-A with carrier aggregation, there is a challenge in effectively controlling measurement gaps across serving cells with different TDD configurations, which affects data transmission rates and network efficiency.
Innovation Solution
A method and apparatus that allow terminals to transmit and receive measurement gap configuration information across multiple frequency bands, enabling precise control of measurement gaps based on TDD configurations, thereby optimizing data transmission and reducing performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If measurement gaps are controlled uniformly across all serving cells in carrier aggregation, then device complexity is reduced, but measurement precision deteriorates due to incompatible TDD configurations across different frequency bands
Solution Approach 1:
The patent divides the measurement gap control into cell-specific segments, where each serving cell can have its own measurement gap configuration tailored to its TDD settings. This allows the system to handle different TDD configurations (uplink-downlink patterns) for different frequency bands independently, resolving the conflict between uniform control simplicity and configuration-specific measurement accuracy.
Solution Approach 2:
The patent introduces dynamic measurement gap configuration where the network can adjust measurement gap patterns based on the specific TDD configuration of each serving cell. This dynamic adaptation enables the system to optimize measurement timing for each cell's unique uplink-downlink pattern, improving measurement precision without requiring static uniform control across all cells.
2Measurement precision
If measurement gaps are configured for each serving cell individually based on TDD configurations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal measurement gap configuration mechanism that can handle both uniform and cell-specific configurations through a single framework. The network side provides measurement gap patterns that are universally applicable across multiple serving cells, while the device adapts these configurations to individual cell TDD settings, reducing the need for separate control mechanisms for each cell.
Solution Approach 2:
The patent enables the device to autonomously determine appropriate measurement gap configurations for each serving cell based on received TDD configuration information and network-provided measurement gap patterns. This self-service capability reduces the signaling overhead and control complexity by allowing the device to perform local optimization without requiring explicit network control for each cell's measurement gap configuration.
3Measurement precision
If measurement operations are performed continuously across all frequency bands, then measurement precision is maintained, but data transmission rate deteriorates due to resource conflicts with TDD configurations
Solution Approach 1:
The patent implements periodic measurement gap configurations where measurements are performed at specific intervals rather than continuously. The measurement gaps are scheduled periodically according to the TDD configuration of each serving cell, allowing data transmission to occur during non-gap periods. This periodic approach maintains measurement precision by ensuring regular measurement opportunities while maximizing data transmission rates by minimizing the time spent in measurement mode.
4Reliability
If measurement gaps are restricted during uplink subframes to maintain TDD configuration integrity, then reliability of TDD operation is improved, but measurement precision deteriorates due to limited measurement opportunities
Solution Approach 1:
The patent applies local quality by allowing measurement gap configurations to be tailored to the specific TDD settings of each serving cell. For cells with TDD configurations that have more downlink subframes, the system can schedule more measurement opportunities during those subframes. This localized adaptation ensures that measurement operations respect the uplink-downlink boundaries of each cell while maximizing measurement opportunities within the constraints of each cell's TDD configuration.
Data Source
AI summary
One embodiment of the present invention relates to a measuring method of terminal and a measurement information configuration method of a base station in a mobile communication system, and provides a measuring method and a measuring apparatus of a terminal and a configuration method and a configuration apparatus of a base station for configuring information in the terminal, the measurement method comprising the steps of: transmitting, to the base station, the terminal equipment information message including information for configuring measurement gaps with respect to a plurality of frequency bands; receiving from the base station, the measurement gap configuration information set on the basis of the information included in the terminal information message; and measuring according to the measurement gap configuration information.