Base Station Control Signal Field Configuration for 5G NR Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of 5G NR communication, the existing methods for resource allocation in Multiple PDSCH scheduling face inefficiencies, particularly in high subcarrier spacing scenarios where shorter slot lengths lead to increased implementation complexity and power consumption for terminals, resulting in delayed HARQ-ACK feedback and reduced throughput due to the need for longer PDCCH monitoring periods.
Innovation Solution
The proposed solution involves a base station and terminal configuration that dynamically adjusts the configuration of control signal fields based on the number of scheduled PDSCHs, utilizing a k0 offset indicator to optimize time-domain resource allocation and improve the efficiency of control information indication, allowing for flexible resource allocation patterns without increasing the number of bits in the TDRA table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of PDSCHs scheduled by one PDCCH is increased to improve throughput, then the field size for resource allocation indication becomes larger, but the control signal complexity and terminal processing burden increase
Solution Approach 1:
The resource allocation indication is segmented into two parts: a first field in the control signal that indicates a row index in a pre-configured table, and a second field that provides additional resource allocation information. This segmentation allows efficient indication of multiple PDSCH resources without requiring a single large field, thus improving throughput while controlling complexity.
Solution Approach 2:
A resource allocation table is pre-configured and stored in both the base station and terminal before actual resource allocation occurs. The table contains multiple rows with different resource allocation patterns. During scheduling, the base station only needs to indicate a row index in the first field, leveraging the pre-configured table to efficiently represent multiple PDSCH allocations without complex real-time computation at the terminal.
2Speed
If the slot length is shortened to support high subcarrier spacing, then the system responsiveness improves, but the terminal implementation complexity and power consumption increase
Solution Approach 1:
The system dynamically adapts to different slot lengths through the flexible resource allocation indication mechanism. The resource allocation table can be configured with patterns suitable for different slot durations, and the two-field indication method efficiently represents resource allocations regardless of slot length, allowing the system to respond quickly while keeping terminal processing manageable through table-based lookup rather than complex real-time calculation.
3Adaptability or versatility
If the PDCCH monitoring period is extended to accommodate shorter slots, then resource allocation coverage improves, but feedback delay increases
Solution Approach 1:
The resource allocation indication is divided into a first field indicating a row index and a second field providing additional information. This segmentation enables more comprehensive resource allocation coverage within the same control signal bandwidth, allowing the PDCCH to indicate multiple PDSCH resources efficiently without extending the monitoring period, thus reducing feedback delay while maintaining adaptability.
4Productivity
If the field size for resource allocation is increased to indicate more PDSCHs, then the resource allocation capacity improves, but the control information overhead increases
Solution Approach 1:
The resource allocation indication is segmented into a first field (indicating row index in pre-configured table) and a second field (providing additional resource information). This segmentation allows the system to indicate multiple PDSCH resources with controlled overhead by leveraging the compact table-based representation rather than using a single large field, thus improving resource allocation capacity while controlling control information overhead.
Solution Approach 2:
Instead of transmitting complete resource allocation information for multiple PDSCHs, the system transmits a compact row index that references a pre-configured resource allocation pattern in the table. This copying approach significantly reduces control information overhead while maintaining the ability to indicate multiple PDSCH resources, as the detailed allocation patterns are already stored in both base station and terminal.
Data Source
AI summary
This base station is equipped with: a control circuit that varies setting of a field of a control signal in accordance with the size of a second field used for terminal allocation, in a first field of the control signal; and a transmission circuit that transmits the control signal on the basis of the setting.