TDRA Table Selection for Flexible PDSCH Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources to meet the demands of high-speed data traffic, low latency, and high energy efficiency, particularly in supporting advanced services like ultra-reliable low-latency communication (URLLC) and enhanced mobile broadband (EMBB), due to limitations in existing resource allocation methods.
Innovation Solution
A method for dynamically or semi-statically allocating resources to user equipment (UE) in a wireless communication system using downlink control information (DCI), where additional information is delivered to modify the time-domain resource allocation (TDRA) table without changing the DCI, allowing for flexible allocation based on specific services like URLLC or EMBB, and using flags or configurations within the DCI to interpret the TDRA tables differently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TDRA tables are configured to support different services (URLLC, EMBB), then service-specific resource allocation flexibility is improved, but DCI size and processing complexity increase
Solution Approach 1:
The patent segments resource allocation into multiple TDRA tables, each optimized for specific services (URLLC, EMBB). Each table contains service-specific parameters such as different K0 offsets, DMRS mapping types, and time domain resource configurations. This segmentation allows the system to maintain service-specific flexibility while keeping each individual table manageable in size.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the gNodeB can dynamically indicate which TDRA table to use based on the service type and channel conditions. The UE dynamically switches between different TDRA tables depending on the scheduled service, enabling adaptive resource allocation without permanently maintaining all possible configurations simultaneously.
2Adaptability or versatility
If TDRA table size is increased to accommodate more allocation options, then resource allocation flexibility is improved, but DCI bit length increases
Solution Approach 1:
Instead of creating one large TDRA table with all possible allocation options, the patent segments the allocation space into multiple smaller tables. Each table handles a specific subset of allocations (e.g., URLLC allocations in one table, EMBB allocations in another). This segmentation allows the DCI to reference a smaller table rather than encoding all possibilities, reducing the effective bit length needed.
Solution Approach 2:
The patent performs preliminary organization of allocation parameters into pre-defined tables during system configuration. The gNodeB pre-configures multiple TDRA tables with service-specific parameters, and the UE stores references to these tables. During actual scheduling, the DCI only needs to indicate which pre-configured table to use, rather than encoding all allocation details, thereby reducing the bit length of the DCI.
3Measurement precision
If additional information is delivered via DCI to modify TDRA table, then allocation precision is improved, but DCI size increases
Solution Approach 1:
The patent applies local quality by providing service-specific allocation parameters within each TDRA table rather than using a single unified table with generic parameters. Each table contains locally optimized parameters tailored to its specific service type (e.g., minimal latency parameters for URLLC, high throughput parameters for EMBB). This allows precise allocation control for each service without requiring additional DCI bits to specify different parameter sets.
Solution Approach 2:
The patent performs preliminary configuration of service-specific parameters into TDRA tables before actual resource allocation. The gNodeB pre-fills the tables with appropriate K0 offsets, DMRS mapping types, and time domain parameters for different services. During scheduling, the UE simply references the pre-configured table rather than receiving additional modification information via DCI, maintaining allocation precision without increasing DCI size.
Data Source
AI summary
The present disclosure provides a method of being allocated, by a user equipment (UE), a resource via downlink control information (DCI) in a wireless communication system. Specifically, a UE receives, from a base station, a radio resource control (RRC) message including list information associated with a plurality of time-domain resource allocation (TDRA) tables, and receives, from the base station, a DCI in order to be allocated a resource on a time domain. Here, the resource on the time-domain is allocated according to one TDRA table among the plurality of TDRA tables, based on the DCI and the one TDRA table is selected among the plurality of TDRA tables, based on a configuration of the DCI and/or a specific field included in the DCI.