SPS Uplink Signal Repetition Collision Handling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving semi-persistent scheduling (SPS)-based uplink signals due to overlapping time resources, which can lead to collisions and reduced accuracy in signal transmission and reception between user equipment (UE) and base stations (BS).
Innovation Solution
The method involves configuring SPS-based uplink signal repetition, where the UE continues to transmit or receive a first SPS signal without overlapping time resources, and stops or adjusts transmission when a second SPS signal or dynamic UL grant-based signal is detected, allowing for efficient use of radio resources and maintaining power over SPS PUSCH signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SPS-based uplink signal repetition is configured to overlap in time resources, then resource utilization increases, but signal transmission accuracy decreases due to collisions
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the UE to flexibly adjust SPS signal transmission based on real-time channel conditions and collision detection. When a collision is detected between SPS repetition signals, the system dynamically modifies the transmission behavior (dropping or postponing signals) to maintain accuracy while maximizing resource utilization in non-collision scenarios
Solution Approach 2:
The patent applies partial action by selectively transmitting only non-colliding SPS signals and dropping colliding ones. This partial transmission approach ensures that at least some SPS signals are transmitted accurately without requiring complete signal cancellation, thereby maintaining overall system productivity while preserving transmission accuracy for the transmitted portion
2Adaptability or versatility
If the UE monitors PDCCH for dynamic scheduling while SPS is activated, then scheduling flexibility increases, but the complexity of signal management increases
Solution Approach 1:
The patent introduces a collision detection and resolution mechanism as an intermediary layer between SPS and dynamic scheduling. This intermediary monitors both SPS configurations and dynamic grants, detects potential collisions, and resolves them according to predefined priority rules, thereby enabling both SPS and dynamic scheduling to coexist without requiring complete system redesign
Solution Approach 2:
The patent segments the signal management process into distinct handling paths for SPS signals and dynamic grants. By separating the management of these two scheduling types and introducing explicit collision detection logic, the system reduces overall complexity compared to a unified approach that would need to handle all scheduling decisions in a single complex framework
3Loss of energy
If SPS scheduling is used for periodic transmission, then overhead decreases, but the ability to handle collisions with dynamic scheduling is limited
Solution Approach 1:
The patent makes the SPS system dynamic by introducing collision detection and adaptive response mechanisms. The UE dynamically adjusts its behavior based on whether a dynamic grant is received and whether collisions are detected, allowing SPS to maintain its low-overhead advantage while gaining the ability to adapt to dynamic scheduling scenarios
Data Source
AI summary
A method for a terminal transmitting a signal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a base station, a semi-persistent scheduling (SPS) configuration for SPS-based uplink signal repetition; and, on the basis of the SPS configuration, repeatedly transmitting a first SPS uplink signal to the base station, wherein, in a state where the repetition of the first SPS uplink signal is in progress, and a time resource of the first SPS uplink signal and a time resource of a second SPS uplink signal overlap, a terminal may continue with the repetition of the first SPS uplink signal in progress, without the transmission of the second SPS uplink signal.