UE Control Resource Sets for Flexible PDSCH Scheduling
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in the control of uplink transmissions, which are not adequately addressed in current 3GPP LTE and NR standards.
Innovation Solution
The implementation of a dedicated RRC configuration that includes information fields in DCI formats to indicate the availability of resource sets for PDSCH, allowing for efficient control of uplink transmissions through UE-specific search spaces, enhancing the flexibility and efficiency of resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated RRC configuration with DCI information fields is implemented to dynamically indicate resource set availability for PDSCH, then communication flexibility and efficiency are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The resource allocation is segmented into multiple control resource sets, each independently configurable and indicated through separate DCI fields. This allows the system to divide the control channel resources into manageable segments that can be dynamically activated or deactivated based on traffic conditions, improving flexibility without requiring complete reconfiguration of the entire control channel structure.
Solution Approach 2:
The patent implements dynamic indication of control resource set availability through DCI formats, allowing the network to adaptively switch between different resource set configurations based on real-time traffic conditions. This dynamic approach enables the system to optimize resource utilization while maintaining the ability to handle varying communication demands, thereby improving adaptability without permanent structural changes.
2Productivity
If control resource sets are configured via RRC and availability is indicated via DCI fields, then resource allocation efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the resource set availability indication from the main RRC configuration and places it in compact DCI fields. By separating the dynamic availability indication from the static RRC configuration, the system can efficiently signal resource set availability using minimal DCI overhead, while the detailed RRC configuration remains unchanged and can be reused across multiple DCI transmissions.
Solution Approach 2:
The DCI format is designed to serve multiple functions: it carries scheduling information for PDSCH/PUSCH and simultaneously indicates the availability of control resource sets. This multi-functionality reduces the need for separate signaling messages, thereby improving resource allocation efficiency while minimizing additional signaling overhead.
3Adaptability or versatility
If multiple control resource sets are configured and dynamically indicated, then uplink transmission flexibility is improved, but conflict between control and shared channels increases
Solution Approach 1:
By segmenting control channel resources into multiple independent control resource sets, the patent enables better spatial and temporal separation between control and shared channels. Each control resource set can be assigned to different time-frequency resources, reducing the probability of conflict between PDCCH and PDSCH/PUSCH transmissions while maintaining flexible uplink transmission capabilities.
Data Source
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AI summary
A user equipment (UE) is described. The UE acquires a dedicated RRC configuration. The dedicated RRC includes first information, second information and third information. The first information indicates one or more control resource set(s). The second information indicates one or more resource set(s), the one or more resource set(s) including at least one of the one or more control resource set(s). The third information indicates whether or not DCI formats include an information field indicating whether or not a subset of the one or more resource set(s) is available for a PDSCH. The UE also monitors a PDCCH in the one or more control resource set(s). The PDCCH carries a DCI format which schedules the PDSCH. The UE further receives the PDSCH. If the third information indicating the DCI formats does not include the information field, or if the DCI format can be mapped in common specific search space, the DCI does not include the information field.