Inter-UE Coordination Timing Window for Sidelink Interference
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Solution Overview
Problem
In wireless communications, managing the timing of inter-user equipment (UE) coordination messages is challenging, leading to potential interference or collisions between sidelink transmissions, as existing methods struggle to ensure timely and accurate delivery of these messages without causing interference with other sidelink communications.
Innovation Solution
A method where a first UE determines a specific time window for selecting sidelink resources for inter-UE coordination messages based on a minimum time configured for these messages, which can differ from other sidelink messages, allowing for early transmission to prevent interference while avoiding collisions, by considering factors like quality of service requirements and discontinuous reception cycles of other UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If inter-UE coordination messages are transmitted earlier to prevent interference, then interference prevention is improved, but collision risk with other sidelink transmissions increases
Solution Approach 1:
The patent applies preliminary action by establishing a dedicated time window for inter-UE coordination message transmission before the actual sidelink communication occurs. The first UE determines this time window in advance based on a minimum time parameter, allowing coordination messages to be sent early enough to prevent interference while the window structure itself prevents collisions with other transmissions.
Solution Approach 2:
The patent segments the sidelink transmission timeline into distinct phases: a time window dedicated to inter-UE coordination message transmission, and separate time windows for actual data transmission. This segmentation allows coordination messages to be transmitted without causing collisions with other sidelink transmissions, while still enabling early warning to prevent interference.
2Device complexity
If a unified minimum time parameter is used for all sidelink messages, then system simplicity is maintained, but timing accuracy for coordination messages deteriorates
Solution Approach 1:
The patent applies local quality by assigning different minimum time parameters to different types of sidelink messages. Specifically, a first minimum time parameter is used for inter-UE coordination messages, while a second minimum time parameter is used for other sidelink messages. This differentiation ensures timing accuracy appropriate to each message type without requiring complex unified timing management.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for managing timing for inter-user equipment (UE) coordination to prevent or minimize interference or collisions between sidelink transmissions. A first UE may determine a time window in which to select sidelink resources for an inter-UE coordination message based on a minimum time configured for selecting the sidelink resources. The minimum time configured for selecting the sidelink resources for the inter-UE coordination message may be different from a minimum time configured for selecting sidelink resources for other sidelink messages. The first UE may then select the sidelink resources in the time window for the inter-UE coordination message and transmit the inter-UE coordination message on the selected sidelink resources to the second UE over a sidelink.