Sidelink UE Simultaneous Mode 1 and Mode 2 Transmission Patterns
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Solution Overview
Problem
Existing wireless telecommunication systems, particularly in 5G NR V2X, face challenges in efficiently determining which part of sidelink data to transmit using mode 1 or mode 2, limiting performance improvement and flexibility in resource usage.
Innovation Solution
Configuring a sidelink UE to use simultaneous mode 1 and mode 2 for one or more sidelink logical channels, along with multiple transmission patterns that indicate packet split ratios, sequential usage, and criteria for selecting the appropriate transmission pattern based on real-time conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE uses only a single SL transmission mode (mode 1 or mode 2), then the system operation is simpler and easier to manage, but the flexibility in resource usage is limited and load balancing cannot be achieved
Solution Approach 1:
The patent implements dynamic transmission patterns that allow a UE to switch between mode 1 and mode 2 based on real-time conditions. The network configures multiple transmission patterns with different packet split ratios, and the UE actively selects the most suitable pattern based on measured conditions such as CBR, PRR, latency, and retransmission counts. This dynamic adaptation enables flexible resource usage while maintaining manageable system operation through standardized selection criteria.
2Reliability
If a UE uses simultaneous mode 1 and mode 2 transmission, then load balancing and service availability are improved, but the complexity of determining which part of data to transmit via which mode increases
Solution Approach 1:
The network performs preliminary configuration by providing the UE with a set of pre-defined transmission patterns before the UE needs to make transmission decisions. Each pattern includes pre-specified packet split ratios and selection criteria. This preliminary action reduces the real-time decision complexity, as the UE only needs to measure current conditions and match them against the pre-configured patterns rather than creating transmission strategies from scratch.
Solution Approach 2:
The patent implements a feedback mechanism where the UE continuously measures transmission conditions (CBR, PRR, latency, retransmissions) and uses this feedback to select the most appropriate transmission pattern. The UE reports the selected pattern and relevant measurements to the network, which can then adjust the configured patterns based on this feedback. This closed-loop approach simplifies the determination process by using empirical data to guide mode selection.
3Productivity
If the network provides detailed configuration for transmission patterns, then the UE can make more informed decisions for load balancing, but the signaling overhead and configuration complexity increases
Solution Approach 1:
The patent configures transmission patterns using a set of key parameters (packet split ratios, selection thresholds for CBR, PRR, latency, retransmission counts) rather than providing exhaustive detailed instructions. The network can adjust these parameters to optimize load balancing efficiency for different scenarios. This parameter-based configuration approach provides sufficient information for informed UE decisions while keeping signaling overhead manageable through standardized parameter sets.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for selecting and/or applying a sidelink (SL) transmission mode are provided. One method may include configuring, by a network node, at least one sidelink (SL) user equipment (UE) to use simultaneous sidelink (SL) mode 1 and mode 2 for one or more sidelink (SL) logical channels (LCHs). The method may also include configuring the at least one sidelink (SL) user equipment (UE) with a plurality of transmission patterns related to the use of the sidelink (SL) mode 1 or mode 2.