Sidelink Priority Thresholds for URLLC Uplink Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving ultra-reliable and low-latency sidelink communications, particularly in vehicle-to-everything (V2X) and vehicle-to-vehicle scenarios, due to limitations in radio access networks and protocol stacks that hinder efficient data transmission and reception.
Innovation Solution
The implementation of advanced radio access networks and protocol stacks, including New Radio (NR) and Evolved UMTS Terrestrial Radio Access (E-UTRA) architectures, with features such as dual connectivity, bandwidth adaptation, and hybrid automatic repeat request mechanisms, to enhance sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing radio access networks and protocol stacks are used for sidelink communications, then device complexity is reduced, but reliability and latency performance deteriorate
Solution Approach 1:
The patent segments the radio access network into separate gNodeBs (first and second gNodeBs) with distinct functional roles. The first gNodeB handles initial connection and control signaling, while the second gNodeB provides enhanced sidelink communication services. This segmentation allows each node to be optimized for specific functions, improving overall system reliability without requiring every device to implement the complete complex protocol stack.
Solution Approach 2:
The patent introduces a second gNodeB as an intermediary entity that mediates between the first gNodeB and the wireless device for sidelink communications. This intermediary provides specialized functions including enhanced error correction, resource allocation, and coordination, thereby improving reliability and latency performance without directly increasing the complexity of the wireless device itself.
2Productivity
If existing protocol stacks are used for V2X communications, then ease of operation is maintained, but data transmission efficiency and latency deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation and adaptive modulation techniques at the second gNodeB, allowing the system to adjust transmission parameters in real-time based on channel conditions and traffic requirements. This dynamic approach optimizes data transmission efficiency and reduces latency while maintaining ease of operation through automated parameter adjustment, eliminating the need for manual configuration.
Solution Approach 2:
The patent utilizes parameter changes including modified transmission time intervals, adjusted modulation and coding schemes, and variable resource block allocations to enhance data transmission efficiency. These parameter adjustments are performed automatically by the network side, maintaining operational simplicity while significantly improving productivity and latency performance for V2X communications.
3Reliability
If advanced radio access networks with dual connectivity are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the complex dual connectivity functionality and advanced error correction mechanisms from the wireless device and places them in the network infrastructure (second gNodeB). The wireless device maintains a simpler protocol stack while benefiting from the extracted complex functions through the network's enhanced capabilities, thereby improving reliability without proportionally increasing device complexity.
Data Source
AI summary
A wireless device determines whether a sidelink transmission has a higher priority than an uplink transmission based on comparing a priority value of the sidelink transmission to a first priority threshold for ultra reliable low latency communications (URLLC) uplink transmissions in response to the uplink transmissions being associated with a first priority class and the priority value of the sidelink transmission to a second priority threshold for non-URLLC uplink transmissions in response to the uplink transmission being associated with a second priority class different from the first priority class. Based on the determining, the wireless device transmits at least one of: the sidelink transmission or the uplink transmission.