Multi-Beam Control Channel Detection Range Configuration
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Solution Overview
Problem
In multi-beam communication systems, terminal devices face increased complexity and battery power consumption due to the need to detect control channels across the entire time domain in future communication systems like 5G, where multiple PDCCHs and PDSCHs have flexible start times and durations.
Innovation Solution
A method where a network device sends configuration information to a terminal device to determine specific time domain resources for control channel detection, excluding resources without synchronization or broadcast signals, thereby reducing unnecessary detection tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device performs blind detection in the first few symbols of each subframe as in LTE, then the control channel detection is simple and fixed, but the system cannot support flexible multi-beam transmissions with varying start times and durations
Solution Approach 1:
The network device pre-configures time domain resource information indicating specific time domain resources where control channels are transmitted. The terminal device uses this pre-configured information to directly determine detection resources without performing blind detection across all symbols, thus maintaining adaptability while reducing complexity.
2Adaptability or versatility
If the terminal device detects control channels in the whole time domain to support flexible multi-beam transmissions, then the system achieves full coverage and flexibility, but the terminal device complexity and battery power consumption increase
Solution Approach 1:
The invention extracts and identifies only the specific time domain resources where control channels are actually transmitted within the entire time domain. The terminal device is configured with information indicating these specific resources, allowing it to exclude non-relevant time periods from detection, thus reducing energy consumption while maintaining multi-beam support capability.
3Reliability
If the terminal device performs blind detection across all time domain resources, then no control channel is missed, but the detection complexity and processing overhead increase significantly
Solution Approach 1:
The network device provides pre-configured time domain resource information before the terminal device performs detection. This preliminary information guides the terminal to focus detection efforts only on configured time domain resources, ensuring reliability by preventing missed detections while significantly reducing complexity compared to exhaustive blind detection.
Data Source
AI summary
Provided are a method and device for determining a detection range for a control channel in a multi-beam system. The method includes a network device sends configuration information to a terminal device, wherein the configuration information is used for the terminal device to determine a time domain resource in which control channel detection is required within a target downlink time period according to the configuration information, and the time domain resource includes multiple time domain scheduling units. According to the method for determining the detection range for the control channel in the multi-beam system of the embodiment of the present application, the terminal device only needs to perform the detection of control channel on the time domain resource determined according to the configuration information, and those time domain resources on which a control channel of a current beam is determined not to exist, may be excluded through the configuration information.