Wireless CG Resource Positioning for Nonintegral TSC Periods
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Solution Overview
Problem
The challenge in 5G Industrial Internet of Things (IIoT) is calculating the position of pre-configured grant (CG) resources for Time Sensitive Communication (TSC) services, as the service periods are not always an integral multiple of 10240 ms, leading to inconsistencies in understanding the reference System Frame Number (SFN), which can result in unavailable uplink resources and compromised Quality of Service (QoS).
Innovation Solution
A method for determining System Frame Number (SFN) reference information and time domain offsets for CG resources, ensuring synchronized understanding between terminal and network devices, using dedicated information or indication signals to align the starting offset and position of CG resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pre-configured grant (CG) resources are used for periodic TSC service transmissions, then resource allocation efficiency is improved, but calculation accuracy of CG resource position deteriorates when service period is not an integral multiple of 10240 ms
Solution Approach 1:
The patent introduces SFN reference information as a new parameter to modify the time domain offset calculation. By changing the reference frame from absolute SFN=0 to a configurable SFN reference point, the system can accurately calculate CG resource positions for any service period length, resolving the precision issue while maintaining efficient periodic resource allocation.
2Device complexity
If SFN reference information is not properly aligned between terminal and network, then device complexity is reduced, but reliability of TSC service transmission deteriorates due to unavailable uplink resources
Solution Approach 1:
The patent implements a feedback mechanism where the network device sends SFN reference information to the terminal device, and the terminal device uses this information to calculate the correct CG resource position. This feedback loop ensures both devices are aligned on the reference frame, guaranteeing reliable uplink resource availability while keeping the configuration process simple through dedicated information signaling.
Data Source
AI summary
Provided are a wireless communication method, a terminal device and a network device, wherein a CG resource position can be calculated so as to satisfy transmission requirements of a TSC service. The wireless communication method includes: a terminal device determining, according to dedicated information sent by a network device, SFN reference information and a time domain offset of a first CG resource, wherein the SFN reference information is used for indicating a reference time of the time domain offset of the first CG resource; and the terminal device determining, according to the SFN reference information and the time domain offset of the first CG resource, a start offset of the first CG resource and/or a time domain position of a second CG resource.