Uplink Resource Overlap Handling for Grant-Based and Grant-Free Access
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Solution Overview
Problem
Existing communication systems face challenges in managing resource collisions between grant-based (GB) and grant-free (GF) transmission mechanisms, leading to interference and performance loss for GB devices.
Innovation Solution
A communication method that involves determining a first transmission scheme for GB devices, including channel coding and multiple access schemes, to minimize interference from GF devices by dividing time-frequency resources and adjusting coding and access parameters in overlapping areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If grant-free pre-configuration transmission mechanism is used, then transmission latency is reduced and scheduling overhead is minimized, but resource collision and interference with grant-based transmission occur
Solution Approach 1:
The patent segments the time-frequency resource into multiple resource sets, identifying overlapping areas between grant-based and grant-free transmission. By dividing the resource space and marking collision zones, the system can apply different transmission strategies to different segments, reducing interference while maintaining the low latency advantage of grant-free transmission.
Solution Approach 2:
The patent applies different channel coding schemes and multiple access schemes to different regions of the time-frequency resource. In overlapping areas, specialized coding and access methods are applied to minimize interference, while non-overlapping areas use standard schemes, thereby achieving local optimization that balances latency and interference reduction.
2Quantity of substance
If channel resources are limited and resource collision occurs, then spectrum efficiency is improved, but grant-based terminal device performance deteriorates
Solution Approach 1:
The patent dynamically adjusts transmission parameters including channel coding rate, code block size, and multiple access scheme based on the detected overlapping area characteristics. By changing these parameters in response to resource collision conditions, the system maintains spectrum efficiency while protecting grant-based terminal performance through adaptive parameter modification.
3Reliability
If transmission scheme is optimized for grant-based devices, then reliability is improved, but transmission flexibility and adaptability to grant-free scenarios are reduced
Solution Approach 1:
The patent implements a dynamic transmission scheme where the base station can switch between different coding and access methods based on real-time detection of resource overlaps. The system transitions from a static, grant-based optimized mode to a dynamic mode that adapts to grant-free transmission patterns, maintaining both reliability and flexibility through conditional parameter adjustment.
Data Source
AI summary
The disclosed embodiments provide a communication method and apparatus, a computer-readable storage medium, and a computer program product. In the method, when a first communication apparatus determines that a first resource set used by a grant-based first terminal device for uplink transmission overlaps a second resource set used by a grant-free second terminal device for uplink transmission, the first communication apparatus determines a first transmission scheme in which the first terminal device performs the uplink transmission in an overlapping area, where the first transmission scheme includes at least one of a first channel coding scheme and a first multiple access scheme, and the overlapping area is determined by performing area division on a time-frequency resource of the first terminal device based on the overlapping. The first communication apparatus outputs the first transmission scheme.