Sidelink Transmission Segmentation for Mixed Numerology Alignment
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Solution Overview
Problem
Concurrent transmissions using different numerologies in wireless communications systems can cause loss of coherency due to misaligned symbol and slot times, leading to reduced data throughput and inefficient use of transmission medium.
Innovation Solution
Segment longer transmissions on a first component carrier to align in time with shorter transmissions on a second component carrier, maintaining phase continuity and transmission coherency across component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If concurrent transmissions using different numerologies are performed on different component carriers, then transmission flexibility and data throughput are improved, but transmission coherency and phase continuity are lost due to misaligned symbol and slot times
Solution Approach 1:
The patent segments the longer transmission into multiple transmission segments that are aligned with the shorter transmission's symbol and slot boundaries. This segmentation allows each segment to be transmitted coherently with the shorter transmission while maintaining overall data throughput by utilizing all available time resources.
Solution Approach 2:
The patent changes the transmission parameters by introducing a segmentation indicator that signals to the receiving device how the longer transmission is divided into segments. This parameter change enables the receiving device to properly decode the segmented transmission while maintaining phase continuity and transmission coherency across segments.
2Reliability
If longer transmissions are segmented to align with shorter transmissions, then transmission coherency is maintained, but device complexity increases due to segmentation management and indication signaling
Solution Approach 1:
The patent introduces a segmentation indicator as an intermediary element that carries segmentation information between transmitting and receiving devices. This indicator serves as a mediator that enables coordinated segmentation management without requiring complex direct coordination protocols, thereby reducing device complexity while maintaining transmission coherency.
3Loss of time
If the first scheduled sidelink transmission is segmented into multiple segments, then time domain overlap with the second transmission is managed, but transmission time is extended due to segmentation overhead
Solution Approach 1:
The patent applies partial segmentation only to the extent necessary to resolve time domain overlaps with the second transmission. By segmenting only the overlapping portions and leaving non-overlapping portions as single transmissions, the patent minimizes segmentation overhead and transmission time extension while still effectively managing time domain conflicts.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communications by a user equipment (UE). In one aspect, a method includes determining that (1) a first scheduled sidelink transmission to a first receiving UE using a first set of component carriers and (2) a second scheduled sidelink transmission to a second receiving UE using a second set of component carriers will overlap in a time domain; determining that the first scheduled sidelink transmission has a first transmission time length and the second scheduled sidelink transmission has a second transmission time length, wherein the second transmission time length is shorter than the first transmission time length; segmenting the first scheduled sidelink transmission into a plurality of first sidelink transmission segments; and sending, to the first receiving UE, an indication of the plurality of first sidelink transmission segments.