Control Channel Resource Mapping for REDCAP Terminal Reliability
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Solution Overview
Problem
Existing mobile communications systems face challenges in meeting the diverse requirements of different application scenarios, particularly for reduced capability (REDCAP) terminal devices in massive machine type communications (mMTC), such as ensuring communication reliability and minimizing resource conflicts among various terminal devices.
Innovation Solution
A communication method and apparatus that allows a terminal device to monitor a control channel by selectively utilizing resource blocks or control channel elements within a control resource set, determining specific indexes and resource allocations based on device bandwidth and other parameters to ensure compatibility and reliability across different types of terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal device with limited bandwidth attempts to monitor the entire control resource set, then more control channels can be monitored, but the device cannot process the full bandwidth and communication reliability deteriorates
Solution Approach 1:
The control resource set is segmented into multiple control resource element groups (REG bundles), and the terminal device monitors only a subset of these groups based on its bandwidth capability. This segmentation allows the system to adapt the monitoring scope to match the terminal's processing capacity while maintaining communication reliability.
Solution Approach 2:
Different terminal devices are assigned different local qualities of service by monitoring different subsets of REG bundles. The network device configures the specific REG bundles to be monitored based on the terminal's bandwidth capability, ensuring each terminal receives appropriate service quality matched to its capabilities.
2Productivity
If different terminal devices monitor the same control resource set, then resource utilization is improved, but resource conflicts and interference increase
Solution Approach 1:
The control resource set is divided into multiple REG bundles that can be selectively assigned to different terminal devices. This segmentation enables multiple terminals to share the overall resource set without conflict, as each terminal monitors a specific subset of REG bundles configured according to its bandwidth capability.
Solution Approach 2:
The network device dynamically configures the parameters of REG bundles (such as frequency location and size) based on the terminal's bandwidth capability and current network conditions. This parameter adaptation allows efficient resource sharing while minimizing interference between different terminal devices.
Data Source
AI summary
Embodiments of this application disclose a communication method and a communications apparatus, to be used by a terminal device to monitor a control channel on a corresponding resource, to implement communication between a network device and a terminal device of this type. A first terminal device monitors a first control channel on M REGbundles in W REGbundles or on M CCE resources corresponding to the M REGbundles. In this solution, a network device can configure a control channel resource for the first terminal device and a second terminal device, and the first terminal device and the second terminal device belong to different types of terminal devices, so that communication reliability of the first terminal device can be ensured without affecting a communication resource of the second terminal device.