Terminal Search Space Configuration for 5G Dynamic Spectrum Sharing
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Solution Overview
Problem
In the 5G wireless communication system, Dynamic Spectrum Sharing (DSS) faces challenges in scheduling flexibility due to limitations when a secondary cell transitions to a non-active state, leading to restricted downlink control channel monitoring and scheduling.
Innovation Solution
A terminal is configured with a control unit to manage a search space set group and a reception unit to receive downlink control channels from secondary cells, allowing for dynamic switching of scheduling configurations based on the cell's state, enabling continued scheduling even when secondary cells transition between active and non-active states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-carrier scheduling is performed by a secondary cell to improve scheduling flexibility, then scheduling flexibility is improved, but when the secondary cell transitions to a non-active state, downlink control channel monitoring stops and scheduling is limited
Solution Approach 1:
The patent applies dynamics by making the search space set configuration changeable based on the secondary cell's state. The terminal switches between first search space set group (when secondary cell is active) and second search space set group (when secondary cell is non-active), allowing the system to adapt dynamically to cell state changes while maintaining scheduling flexibility and continuity
Solution Approach 2:
The patent changes the parameter of search space set configuration based on the secondary cell's active/non-active state. By switching between different search space set groups with different configurations, the system maintains scheduling capability regardless of the secondary cell state, resolving the contradiction between scheduling flexibility and scheduling continuity
Data Source
AI summary
A terminal includes: a control unit, configured to configure a search space set group; and a reception unit configured to receive a downlink control channel from a secondary cell, based on the search space set group. The reception unit receives a downlink shared channel or an uplink shared channel via another cell that is scheduled by the downlink control channel and is different from the secondary cell, and the control unit switches a configuration related to downlink control channel monitoring, based on a state of the secondary cell.