Group-Based Propagation Delay Compensation Signaling
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Solution Overview
Problem
In wireless communications, over-the-air signaling experiences propagation delays that disrupt time synchronicity between devices, leading to inefficiencies and reduced throughput, especially in scenarios with a large number of user equipment (UEs) or UEs close together, where UE-specific propagation delay compensation (PDC) increases signaling overhead and detracts from system efficiency.
Innovation Solution
Implementing a group-based PDC procedure where a network entity provides a common set of PDC values to a group of UEs, allowing them to adjust their timing communications, formed based on location, communication type, or channel measurements, reducing overhead by using a single set of PDC values for multiple UEs and enabling efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE-specific propagation delay compensation (PDC) is implemented to compensate for propagation delays, then time synchronicity between devices is improved, but signaling overhead increases and system efficiency decreases
Solution Approach 1:
The patent merges PDC values for multiple UEs into a single common set of PDC values that is shared by a group of UEs. Instead of providing individual PDC values to each UE, the network entity provides a unified PDC configuration that benefits multiple UEs simultaneously, thereby reducing signaling overhead while maintaining time synchronicity compensation
Solution Approach 2:
The common set of PDC values serves multiple UEs with similar propagation delay characteristics. This universal approach allows a single PDC configuration to function for multiple devices, eliminating the need for separate UE-specific configurations and reducing overall signaling requirements in the system
2Reliability
If UE-specific PDC is provided to each user equipment, then individual propagation delay compensation is achieved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent combines multiple UE-specific PDC configurations into a single common PDC configuration that applies to a group of UEs. This merging approach maintains accurate propagation delay compensation for each UE while significantly reducing the signaling overhead and complexity associated with managing individual PDC configurations for each device
3Loss of information
If common set of PDC values is provided to multiple UEs, then signaling overhead is reduced, but adaptability to individual UE conditions decreases
Solution Approach 1:
The patent applies local quality by providing different PDC configurations to different groups of UEs based on their specific propagation delay characteristics. UEs with similar propagation delay profiles are grouped together and receive tailored common PDC values, ensuring that each group receives optimized compensation while still benefiting from reduced signaling overhead compared to fully UE-specific approaches
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for propagation delay compensation (PDC). In some systems, a network entity and a group of user equipment (UEs) may support a group-based PDC procedure according to which the network entity may provide group-based PDC information to the group of UEs. In some aspects, a UE may participate in such a group-based PDC procedure in accordance with a clock accuracy constraint of the UE and depending on whether other UEs are likely to have similar PDC information. The network entity may assign an identifier (ID) to the group of UEs and scramble a message including the group-based PDC information using the ID. As such. UEs of the group of UEs may decode the message using the ID and adjust a timing of communications with the network entity using the group-based PDC information.