Dual-Mode Wireless Interface Coordination for LTE-NR Sidelink Sharing
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Solution Overview
Problem
Inefficient resource allocation and interference between LTE and NR wireless communication standards in vehicle-to-everything (V2X) systems, particularly in scenarios lacking network coverage, lead to communication inefficiencies and interference due to incompatible resource allocation mechanisms.
Innovation Solution
Implementing a method in dual-mode UEs to internally share information between LTE and NR interfaces, allowing them to operate in a coordinated manner by controlling the NR interface based on LTE resource reservations, even in the absence of network coverage, thereby reducing computational load and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE and NR interfaces operate independently with separate resource allocation mechanisms, then each interface can function autonomously, but resource utilization becomes inefficient and interference occurs between the two standards
Solution Approach 1:
The patent merges the resource allocation operations of LTE and NR interfaces by having the NR interface monitor and share LTE resource reservation information. This combination allows both interfaces to coordinate their resource usage, preventing conflicts and improving overall resource utilization efficiency while maintaining communication reliability.
Solution Approach 2:
The patent implements a feedback mechanism where the NR interface continuously monitors LTE resource reservations and adjusts its own resource allocation accordingly. This feedback loop enables dynamic coordination between the two interfaces, allowing them to adapt to changing channel conditions and traffic demands while avoiding resource conflicts.
2Productivity
If NR interface continuously monitors and decodes LTE transmissions to coordinate resource allocation, then resource allocation efficiency improves, but computational load and power consumption increase
Solution Approach 1:
The patent applies partial action by having the NR interface monitor only specific LTE transmissions that are relevant for resource allocation coordination, rather than continuously decoding all LTE transmissions. This selective monitoring approach maintains resource allocation efficiency while significantly reducing the computational load and power consumption compared to full continuous monitoring.
3Object-generated harmful factors
If dual-mode UEs implement coordinated operation between LTE and NR interfaces, then interference between standards is reduced, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the NR interface acts as a monitor and coordinator that receives LTE resource reservation information and uses it to adjust NR resource allocation. This intermediary approach simplifies the coordination by establishing a clear information flow from LTE to NR, reducing the overall system complexity compared to fully bidirectional coordination while effectively reducing interference between the two standards.
Data Source
AI summary
Methods enabling reductions in the power consumption and a momentary required computational power in situations in which wireless apparatus operating in accordance with different, mutually not interoperable standards use a shared radio resource through the use of dual-mode UEs configured for executing at least some of the methods are presented. Such use of a shared radio resource may include so-called sidelink communication. In these situations the dual-mode UEs internally share information about use of resource elements in the shared resource as reserved or intended for use by UEs operating in accordance with the first communication standard, and forward such information to UEs that are limited to communicating in accordance with the second communication standard, for accordingly modifying the operation of the second-type wireless interfaces.