Measurement Gap Activation Scheduling in 5G Uplink Control
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Solution Overview
Problem
The challenge of efficiently managing gaps for various operations in wireless communication systems, such as measurement, MUSIM, and transmission power control, is not adequately addressed in existing 5G systems, leading to inefficiencies in terminal operations.
Innovation Solution
The method involves transmitting UECapabilityInformation to the base station to request low latency measurement gap activation, setting up and activating measurement gaps, and performing scheduling requests during these gaps, with the base station responding to these requests to manage gap operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gaps are activated for terminal operations, then measurement accuracy and operational flexibility are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The base station pre-configures multiple measurement gap patterns (e.g., pattern 0, pattern 1) with different time intervals and durations before the terminal needs measurement. When the terminal sends a scheduling request indicating need for measurement gap, the base station can immediately activate a pre-configured pattern without complex real-time negotiation, thus improving measurement responsiveness while keeping activation signaling simple.
Solution Approach 2:
The system implements dynamic measurement gap activation where the base station can activate or deactivate specific gap patterns based on terminal requests and network conditions. The terminal can indicate its measurement needs through scheduling requests, and the base station dynamically selects appropriate pre-configured patterns, providing flexibility without requiring complex real-time gap configuration negotiations.
2Adaptability or versatility
If multiple gap patterns are pre-configured for different operations, then operational flexibility and responsiveness are improved, but configuration complexity and signaling overhead increase
Solution Approach 1:
The measurement gap configuration is segmented into multiple independent patterns (e.g., pattern 0 with 4ms interval, pattern 1 with 8ms interval), each optimized for specific measurement scenarios. The terminal can request specific patterns based on its operational needs, and the base station activates only the required patterns rather than configuring all possible gaps, reducing actual configuration overhead while maintaining flexibility.
Solution Approach 2:
Instead of configuring all possible measurement gap patterns upfront, the system configures only the most commonly needed patterns (partial action) and activates them selectively based on terminal requests. This approach provides sufficient operational flexibility for most scenarios while minimizing configuration complexity and signaling overhead compared to configuring every possible gap pattern.
3Speed
If measurement gaps are activated frequently for low latency operations, then operational responsiveness is improved, but terminal power consumption and system resource usage increase
Solution Approach 1:
Measurement gaps are activated periodically based on pre-configured patterns rather than continuously. The terminal and base station agree on gap patterns with specific periodicities (e.g., every 4ms or 8ms), allowing the terminal to enter sleep modes between gaps when no measurement is needed, thus reducing power consumption while maintaining operational responsiveness when measurements are required.
Solution Approach 2:
Different gap patterns with different time intervals are applied locally based on specific measurement needs. For urgent measurements, shorter interval patterns are activated; for routine measurements, longer interval patterns are used. This localized adaptation of gap frequency optimizes responsiveness for critical operations while minimizing power consumption during normal operations.
Data Source
AI summary
The method includes receiving, by the terminal from a base station, the RRCReconfiguration includes a one or more gap configuration and a MAC-CellGroupConfig and a one or more uplink bandwidth part configuration, triggering a Scheduling Request for a first MAC CE if the first MAC CE has been triggered and not cancelled and if uplink shared channel resources are not available for a new transmission, performing Scheduling Request transmission based on a specific first configuration, the specific first configuration is indicated by the first field, transmitting, by the terminal to the base station to request activation of a first gap, the first MAC CE and receiving a second MAC CE, the second MAC CE includes a fourth field and a fifth field, the fourth field indicates activation or deactivation of a second gap, the fifth field includes a value corresponding to an identifier of the second gap.