Grant-Free Transmission Resource Index Determination
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Solution Overview
Problem
In uplink grant-free transmission, existing methods face challenges in determining time-domain resources to prevent overlap between adjacent periods, leading to complexity in resource allocation.
Innovation Solution
A method for determining a time-domain resource used for grant-free transmission, where a terminal device or network device calculates the index of a time unit for grant-free transmission resources based on the first and second time-domain periods and the quantity of resources, ensuring non-overlap by using specific relational expressions and format information of mini-slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual periods are used to configure grant-free transmission resources, then resource allocation flexibility is improved, but determining the time unit index becomes complex due to potential overlap between adjacent periods
Solution Approach 1:
The patent divides the grant-free transmission resources into two distinct types: first grant-free transmission resources configured with a first period, and second grant-free transmission resources configured with a second period. This segmentation allows the terminal device to separately manage and determine time unit indexes for each resource type, avoiding the complexity of handling overlapping resources as a single group while maintaining the flexibility benefits of dual-period configuration.
2Productivity
If grant-free transmission resources are allocated in adjacent periods, then resource utilization is improved, but resource overlap occurs leading to determination complexity
Solution Approach 1:
Instead of trying to prevent overlap by restricting resource allocation to non-adjacent periods, the patent inverts the approach by allowing overlap but using different period configurations (first period vs. second period) to distinguish and manage the resources separately. This inversion maintains high resource utilization while ensuring accurate resource identification through period-based differentiation.
Data Source
AI summary
This application provides a method for determining a time-domain resource used for grant-free transmission. The method includes: obtaining, by a terminal device, a first time-domain period and a second time-domain period of grant-free transmission resources, where a size of the first time-domain period is P1 time units, a size of the second time-domain period is P2 time units, and P1 is greater than or equal to P2; obtaining, by the terminal device, a quantity k of grant-free transmission resources in the first time-domain period; and determining, by the terminal device based on the first time-domain period, the second time-domain period, and the quantity k of grant-free transmission resources in the first time-domain period, an index of a time unit in which a grant-free transmission resource used for grant-free transmission is located. In this way, grant-free transmission resources configured for the terminal device in two adjacent periods do not overlap.