Control Channel Monitoring Across Slot Groups Under High SCS
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Solution Overview
Problem
The increase in sub-carrier spacing (SCS) beyond 120 KHz in wireless communication systems, particularly in the 52.6 GHz-71 GHz frequency band, leads to challenges in completing control signaling processes within the slot duration, as terminals struggle to monitor and process multiple PDCCH candidates due to reduced slot length, affecting both flexibility and monitoring capability.
Innovation Solution
The method involves determining a monitoring slot group and search space to characterize control channel monitoring capability, allowing terminals to monitor control channels across multiple slots, sharing the monitoring capability, and reducing complexity by configuring search spaces across a group of slots rather than individual slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sub-carrier spacing (SCS) is increased to overcome Doppler frequency offsets and phase noise at higher frequencies, then the bandwidth advantages are improved, but the slot length becomes smaller causing terminals to fail to complete control signaling processes within the corresponding slot
Solution Approach 1:
The patent divides the control channel monitoring task across multiple slots by introducing the concept of monitoring slot groups. Instead of requiring all control signaling processes to complete within a single slot, the terminal monitors control channels in the first slot and can continue monitoring in subsequent slots within the same monitoring slot group, effectively segmenting the control signaling process across time.
2Adaptability or versatility
If the terminal monitors multiple PDCCH candidates in each slot to enable flexible base station scheduling, then the scheduling flexibility is improved, but the terminal monitoring capability requirement increases causing complexity issues
Solution Approach 1:
The patent merges multiple slots into a monitoring slot group where the terminal shares monitoring capability across these slots. By configuring search spaces that span multiple slots, the terminal can monitor control channels collectively across the slot group rather than independently in each slot, reducing the per-slot monitoring burden while maintaining overall scheduling flexibility.
3Speed
If the slot length is reduced due to increased SCS, then the communication responsiveness is improved, but the terminal fails to complete receiving and configuring control signaling within the corresponding slot
Solution Approach 1:
The patent configures search spaces and monitoring slot groups in advance, allowing the terminal to know ahead of time which slots belong to which monitoring slot group and what monitoring tasks to perform. This preliminary configuration enables the terminal to distribute control signaling reception and configuration tasks across multiple slots systematically, ensuring reliable completion despite reduced individual slot lengths.
Data Source
AI summary
Provided are a control channel monitoring method and device, a terminal, a base station and a storage medium. The method includes: determining a monitoring slot group for control channel monitoring, and the monitoring slot group is used for characterizing a slot group capable of sharing control channel monitoring capability under a specified slot condition; determining a search space of the monitoring slot group; and monitoring control channels indicated by the search space. Therefore, in the embodiments of the present disclosure, control channels are monitored by taking a monitoring slot group as a unit, and a problem that a terminal is unable to complete the process of receiving and configuring control signaling in a corresponding time slot due to the increase in an SCS is avoided, and the complexity of the terminal to monitor control channels is also reduced.