Resource Mapping Method for Reusing Idle Control Region Resources
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Solution Overview
Problem
In the New Radio (NR) standard of the fifth-generation communications system, there is a need to improve resource utilization in the control region by effectively allocating resources from the control region to the data channel, as existing methods fail to fully utilize idle resources due to mismatched scheduling granularities between control and data channels.
Innovation Solution
The system divides the bandwidth into evenly spaced bandwidth regions, allowing the network device to schedule frequency domain resource units within these regions for data channel transmission, using control information to indicate the location and granularity of these units, ensuring that idle resources in the control region can be reused for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control channel uses CCE-to-REG resource mapping in the control region, then the control channel transmission is ensured, but idle resources remain unused and resource utilization is low
Solution Approach 1:
The patent enables the control region to serve dual purposes: transmitting control channels through CCE-to-REG mapping and transmitting data channels through direct resource block allocation. This multi-functionality allows idle resources in the control region to be reused for data transmission, improving overall resource utilization while maintaining control channel reliability
Solution Approach 2:
The patent introduces dynamic resource allocation where the network device can flexibly assign resource blocks in the control region to data channels based on actual traffic conditions. This dynamic approach allows the system to adaptively switch between control-only mode and control-plus-data mode, optimizing resource utilization without compromising control channel performance
2Productivity
If the data channel reuses idle resources in the control region, then resource utilization is improved, but scheduling granularity mismatch between control and data channels creates complexity
Solution Approach 1:
The patent segments the control region into two parts: resources allocated to control channels using CCE-to-REG mapping and resources allocated to data channels using direct resource block assignment. This segmentation allows independent scheduling of control and data channels with appropriate granularities, reducing scheduling complexity while enabling efficient resource reuse
Solution Approach 2:
The patent introduces a resource allocation mechanism that acts as an intermediary between control channel scheduling and data channel scheduling. The network device uses control information to indicate resource block allocations for data channels in the control region, mediating the scheduling process and resolving granularity mismatches between the two channel types
Data Source
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AI summary
This application provides a resource mapping method, a network device, and a terminal device. The method includes: generating, by a network device, control information, where the control information is used to indicate at least one type of the following information: at least one bandwidth region in which at least one frequency domain resource unit is located, a granularity of the frequency domain resource unit, and a location of the frequency domain resource unit in the bandwidth region; the frequency domain resource unit is a scheduling unit of a frequency domain resource used when the network device and a terminal device transmit a data channel, the granularity of the resource unit is corresponding to a granularity of a resource unit used when the network device and the terminal device transmit a control channel, operating bandwidth of the terminal device includes a plurality of evenly spaced bandwidth regions, and the at least one bandwidth region is one or more of the plurality of bandwidth regions; and sending, by the network device, the control information to the terminal device. In the foregoing method, the data channel may reuse an idle resource in a control region for data transmission, to improve resource utilization.