5G Resource Indication Segmentation for Scheduling Efficiency
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Solution Overview
Problem
In 5G New Radio systems, the base station's inability to determine the time domain resource location for control and data channels in advance leads to challenges in scheduling channel transmission, causing uncertainty for terminal devices regarding resource allocation in inter-slot scheduling.
Innovation Solution
The method involves the network device sending first resource indication information to indicate a frequency domain resource for the target channel in the (n+i)-th time domain unit, followed by second resource indication information to specify the time domain resource, allowing the terminal device to accurately determine the time and frequency resources for transmission, thereby enabling advanced resource scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station determines the time domain resource location for control and data channels in advance, then the scheduling efficiency is improved, but the system cannot support dynamic resource allocation flexibility
Solution Approach 1:
The resource indication is segmented into two separate parts: first resource indication information sent in DCI for frequency domain resource allocation, and second resource indication information sent via RRC signaling for time domain resource allocation. This segmentation allows the base station to determine time domain resources in advance (improving scheduling efficiency) while keeping frequency domain resources dynamically allocatable (maintaining flexibility).
Solution Approach 2:
The base station performs preliminary determination of time domain resource locations for control and data channels before transmitting the first resource indication information. This preliminary action enables the base station to provide accurate time domain resource information in advance through the second resource indication information, improving scheduling efficiency while allowing dynamic frequency domain resource allocation later.
2Adaptability or versatility
If the base station does not determine the time domain resource location in advance, then the dynamic resource allocation flexibility is maintained, but the terminal device cannot prepare for data transmission accurately
Solution Approach 1:
By dividing the resource indication into frequency domain (first resource indication information in DCI) and time domain (second resource indication information in RRC signaling) components, the terminal device can accurately prepare for data transmission on frequency resources while the network maintains flexibility in time domain resource allocation through separate indication mechanisms.
3Measurement precision
If separate resource indication information is sent for frequency and time domain resources, then the resource allocation accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The second resource indication information sent via RRC signaling serves multiple functions: it indicates time domain resource locations for both control channels and data channels, and provides timing advance values. This multi-functionality reduces overall signaling overhead while maintaining accurate resource allocation through a single unified indication mechanism.
Data Source
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AI summary
The present application discloses a method for transmitting data, a terminal device, and a network device. The method includes: receiving, by a terminal device, first resource indication information from a network device at a first moment, the first moment being located in the n-th time domain resource unit, the first resource indication information indicating a frequency domain resource allocated for transmission of a target channel in the (n+i)-th time domain resource unit, and the target channel including a data channel or a control channel of the terminal device, where n and i are positive integers; and receiving, by the terminal device, second resource indication information from the network device at a second moment after the first moment, the second resource indication information indicating a time domain resource allocated for transmission of the target channel in the (n+i)-th time domain resource unit. Thereby, the network device can enable pre-scheduling of resources for transmitting the uplink/downlink channel of the terminal device.