Sidelink Gap Configuration for Interference Management
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Solution Overview
Problem
In LTE systems, wireless terminals face challenges when performing sidelink operations at frequencies belonging to neighboring cells different from the serving cell, as existing technologies do not efficiently manage resource configurations and gap requests for sidelink operations, leading to interference and quality issues.
Innovation Solution
The solution involves a UE requesting and receiving sidelink gap configurations from the serving cell, which schedules and allocates sidelink gaps based on resource pools and subframe patterns, allowing the UE to perform sidelink operations without changing the serving cell, and determining the desired transmission or reception periods to balance quality and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE performs sidelink operations at neighboring cell frequencies, then sidelink discovery and communication capabilities are improved, but interference with serving cell communication and quality degradation occur
Solution Approach 1:
The patent segments the frequency operations by introducing separate gap configurations for serving cell communication and neighboring cell sidelink operations. The UE alternates between serving cell frequency and neighboring cell frequency in dedicated time gaps, preventing simultaneous operations that cause interference while maintaining both capabilities.
Solution Approach 2:
The patent implements periodic gap patterns where the UE periodically switches between serving cell communication and sidelink operations on neighboring cell frequencies. These periodic gaps are configured with specific periodicity and duration, allowing structured alternation that manages interference while enabling sidelink functionality.
2Manufacturing precision
If the UE requests detailed ProSe information for each neighboring cell, then sidelink operation precision is improved, but signaling overhead increases
Solution Approach 1:
The patent creates a universal gap configuration mechanism that can be applied across multiple neighboring cells. Instead of requiring separate detailed ProSe information for each neighboring cell, the UE receives a unified gap pattern configuration that works for sidelink operations on any configured neighboring cell frequency, reducing redundant signaling.
Solution Approach 2:
The patent uses template-based gap configurations where a standard gap pattern can be copied and applied to multiple neighboring cell scenarios. The base gap configuration structure is reused across different neighboring cells, with only minimal parameters needing to be adjusted, significantly reducing the amount of unique information that must be signaled for each cell.
Data Source
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AI summary
A radio terminal according to one embodiment comprises a transmitter configured to transmit a sidelink UE information message to a base station. The sidelink UE information message includes information on a predetermined period for requesting a sidelink gap. The sidelink gap is a gap for transmitting or receiving a discovery message for discovering a proximal terminal at a frequency of a neighbor cell. The information on the predetermined period is configured so that a transmission period for transmitting the discovery message and a reception period for receiving the discovery message can be identified.