Cross-RAT Sidelink Communications With Timing Offset Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently coordinating and synchronizing multiple radio access technologies (RATs) for sidelink communications, particularly in vehicular environments where different RATs may have asynchronous timing and resource allocation mechanisms, leading to inefficiencies and interference.
Innovation Solution
Implementing a method and apparatus that utilize control information across different radio access technologies, including radio access technology information, sidelink resource allocation information, and timing offset information to synchronize and coordinate sidelink communications between different RATs, such as NR and LTE, enabling dynamic cross-RAT scheduling and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio access technologies are used for sidelink communications, then adaptability and coverage are improved, but timing synchronization and resource coordination become more complex
Solution Approach 1:
The patent introduces a timing offset parameter as an intermediary mechanism that mediates between different RAT timing structures. This parameter acts as a translator that converts timing information from one RAT domain to another, enabling synchronized resource allocation across LTE and NR without requiring complex real-time coordination protocols.
Solution Approach 2:
The patent changes the timing parameter representation by introducing explicit timing offset information in the DCI format. This parameter transformation allows the system to handle different RAT timing structures by simply adjusting and communicating offset values, rather than implementing complex timing alignment algorithms.
2Productivity
If cross-RAT resource allocation is implemented, then resource utilization efficiency is improved, but control information processing complexity increases
Solution Approach 1:
The patent creates a universal DCI format structure that can handle both single-RAT and cross-RAT resource allocation. By designing the control information format to be multi-functional with optional fields for timing offsets and RAT identifiers, the system achieves cross-RAT capability without requiring separate processing paths for different scenarios.
Solution Approach 2:
The patent segments the control information into distinct functional fields: RAT identification fields, resource allocation fields, and timing offset fields. This segmentation allows the receiver to process only the relevant portions based on the indicated RAT type, reducing overall processing complexity while maintaining full cross-RAT functionality.
3Adaptability or versatility
If asynchronous timing between RATs is accommodated, then flexibility in resource allocation is improved, but interference coordination becomes more difficult
Solution Approach 1:
The patent applies preliminary action by pre-calculating and indicating timing offset values in the control information before resource transmission occurs. This advance timing specification allows receiving devices to prepare their timing alignment and interference avoidance strategies in advance, preventing interference issues rather than reacting to them.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for multiple radio access technology communications. One method (900) includes receiving (902) control information at a device on a first radio access technology, wherein: the control information comprises radio access technology information, sidelink resource allocation information, and timing offset information; the radio access technology information indicates that the sidelink resource allocation information is for a second radio access technology; and the first radio access technology is different from the second radio access technology; and wherein the timing offset information is used in the device to determine a time to apply the sidelink resource allocation for the second radio access technology.