Wireless Measurement Gap Division for Mission Critical Services
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Solution Overview
Problem
Current LTE/LTE-A systems face challenges in providing continuous, high-reliability connectivity for mission-critical services due to resource shortages and interference, leading to service interruptions during measurement gaps when switching between base stations.
Innovation Solution
A method is proposed to divide the measurement gap into shorter intervals, allowing data transmission and reception in gaps without synchronization signals, ensuring seamless service delivery by configuring alternative base station links and managing radio resource control connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measurement gap is set for inter-frequency measurement in multiple connections, then measurement accuracy is improved, but service continuity deteriorates due to data transmission interruption
Solution Approach 1:
The measurement gap is divided into multiple sub-gaps within the original gap period. Each sub-gap is further segmented into measurement portions and data transmission portions, allowing simultaneous measurement activities and data transmission to occur in different time segments without mutual interference, thereby resolving the contradiction between measurement accuracy and service continuity
Solution Approach 2:
The system dynamically configures measurement gaps based on service requirements. For mission-critical services with stringent reliability requirements, the network can adjust the measurement gap configuration (e.g., gap duration, frequency, sub-gap division) to balance measurement needs with service continuity, making the measurement gap structure adaptive rather than static
2Measurement precision
If measurement gap duration is increased to improve measurement accuracy, then measurement precision is improved, but service interruption time increases
Solution Approach 1:
By segmenting the measurement gap into multiple shorter sub-gaps rather than using one long gap, the system achieves the required total measurement time while distributing interruptions across multiple shorter intervals. This reduces the impact on any single service transmission event and allows for better resource allocation during each sub-gap
Solution Approach 2:
Data transmission is maintained continuously during non-measurement portions of each sub-gap. By organizing the measurement gap structure to allow data transmission in alternating portions within each sub-gap, the system ensures that useful data transmission actions continue without complete interruption, only paused briefly during measurement portions
3Measurement precision
If measurement gaps are configured for all base stations in multiple connections, then measurement completeness is improved, but data transmission reliability deteriorates during gaps
Solution Approach 1:
Different quality requirements are applied to different portions of the measurement gap structure. Measurement portions are optimized for measurement accuracy with higher resource allocation, while data transmission portions are optimized for transmission reliability with appropriate error correction and retransmission mechanisms. This local differentiation allows each function to operate at its optimal performance level
Solution Approach 2:
The system dynamically switches between measurement mode and data transmission mode within each sub-gap. During measurement portions, the terminal focuses on inter-frequency measurement; during data transmission portions, the terminal resumes normal data communication. This dynamic switching allows the system to achieve both measurement completeness and data transmission reliability through time-division multiplexing
Data Source
AI summary
The present invention relates to a method and an apparatus for transmitting and receiving data in a wireless communication system. The present invention can provide a method comprising the steps of: receiving, from a terminal, fourth indication information indicating whether the terminal can provide a mission critical service (MCS); transmitting the fourth indication information to a network node; receiving, from the network node, first indication information indicating division of a measurement gap indicating a gap for performing measurement on a non-serving frequency; transmitting the first indication information to the terminal; and receiving MCS data in at least one divided measurement gap, during which no synchronization signal is detected, among the divided measurement gaps.