Downlink Control Signaling With Shared-Channel UE Reconfiguration
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Solution Overview
Problem
Existing 5G networks face limitations in controlling user equipment (UE) due to limited functionality in Downlink Control Information (DCI) and excessive signaling in Radio Resource Control (RRC) procedures, leading to inefficiencies and increased latency in dynamic resource configuration changes.
Innovation Solution
A mechanism is introduced where Downlink Control Information (DCI) is accompanied by additional information on a Downlink Shared Channel, allowing for more complex and conditional configuration changes, such as Bandwidth Part, Physical Resource Blocks, and Discontinuous Reception schedules, using a Physical Downlink Control Channel and Physical Downlink Shared Channel combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Downlink Control Information (DCI) is used to control user equipment, then control functionality is provided, but the functionality is limited and cannot support complex configuration changes
Solution Approach 1:
The control mechanism is segmented into two parts: DCI for basic control commands and additional information carried in downlink shared channel for detailed configuration parameters. This segmentation allows DCI to maintain its simple structure while the overall system gains enhanced functionality through the additional information carrier.
Solution Approach 2:
The downlink shared channel is utilized for multiple purposes: carrying additional control information, transmitting configuration changes, and providing detailed parameters. This multi-functionality approach allows the system to extend DCI capabilities without creating separate dedicated control channels.
2Adaptability or versatility
If RRC procedures are used to control user equipment, then comprehensive control is achieved, but signaling proliferation occurs and latency increases
Solution Approach 1:
Detailed configuration information is prepared and embedded within the DCI structure itself, allowing the UE to receive both the control command and the detailed parameters in a single operation. This preliminary action eliminates the need for subsequent separate RRC signaling steps and reduces latency.
Solution Approach 2:
The invention merges the DCI control command with additional configuration information into a unified transmission mechanism. By combining these elements, the system achieves comprehensive control capability while reducing the number of separate signaling messages required compared to traditional RRC procedures.
3Adaptability or versatility
If additional information is transmitted over downlink shared channel, then configuration change functionality is enhanced, but signaling overhead increases
Solution Approach 1:
The additional information is transmitted only when and where needed, rather than being continuously sent. The downlink shared channel carries configuration details selectively based on the specific control scenario, optimizing the balance between functionality and overhead by applying quality locally rather than uniformly.
Data Source
AI summary
An apparatus, comprising: at least one processor; and at least one memory storing instructions that when executed by the at least one processor cause the apparatus at least to perform: transmitting Downlink Control Information to a user equipment, said Downlink Control Information having a control command for said user equipment together with an indication that additional information related to said control command is to be transmitted over a Downlink Shared Channel; and transmitting said additional information related to said control command over said Downlink Shared Channel.