Terminal Random Access Preamble Transmission Resource Configuration
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Solution Overview
Problem
In a radio communication system where LTE and NR systems share a common frequency band, there is a need to suppress interference caused by NR uplink transmissions on LTE downlink receptions, particularly during random access preamble transmissions.
Innovation Solution
A terminal is configured to receive an index specifying configuration information for transmitting a random access preamble and additional information specifying a time domain resource. The terminal then configures the time domain resource by replacing the original resource with the specified additional resource, allowing for non-standard subframe assignments for random access preamble transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal transmits random access preamble using default configuration information, then the transmission procedure is simple and quick, but interference may occur with LTE downlink transmissions
Solution Approach 1:
The patent implements dynamic configuration of random access preamble transmission resources by allowing the terminal to receive additional information that specifies alternative time domain resources. The terminal can dynamically switch between default configuration and additional configuration based on reception status, enabling adaptive resource selection that avoids LTE downlink interference while maintaining operational simplicity
Solution Approach 2:
The patent changes the time domain resource parameter for random access preamble transmission by introducing additional configuration information that specifies alternative subframe assignments. This parameter modification allows the transmission to occur in time slots that do not overlap with LTE downlink transmissions, thereby resolving the interference issue while preserving the quick transmission capability
2Adaptability or versatility
If the terminal uses standard subframe assignments for random access preamble, then compatibility with existing protocols is maintained, but interference with LTE downlink transmissions occurs
Solution Approach 1:
The patent achieves multi-functionality by designing a dual-configuration system where the terminal can operate with both default configuration information (maintaining protocol compatibility) and additional configuration information (enabling interference avoidance). The terminal universally supports both standard and modified subframe assignments, allowing it to adapt to different operational requirements while maintaining compatibility with existing protocols
Solution Approach 2:
The patent applies preliminary action by having the terminal receive and store additional configuration information in advance, which specifies alternative time domain resources for random access preamble transmission. This pre-configured information enables the terminal to proactively select interference-free transmission opportunities without disrupting the standard protocol flow, thereby maintaining compatibility while avoiding interference
Data Source
AI summary
A terminal includes a receiver that receives an index specifying configuration information for transmitting a random access preamble; and a controller that configures, in response to the receiver receiving additional information that specifies a time domain resource for transmitting the random access preamble, the time domain resource specified by the additional information, the time domain resource being configured by replacing a time domain resource for transmitting the random access preamble included in the configuration information specified by the index with the time domain resource specified by the additional information.