Single DCI Scheduling Multiple Component Carriers
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in scheduling data transmissions on multiple component carriers, leading to increased signaling overhead and reduced network reliability due to the need for multiple downlink control information (DCI) messages, which can impact peak throughput and spectral efficiency.
Innovation Solution
Implementing a method where a single DCI message schedules data transmissions on multiple component carriers or time intervals by configuring units into groups with shared parameters, using bit-map or resource indication value (RIV) indications to mitigate signaling resources and improve scheduling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple DCI messages are used to schedule data transmissions on multiple component carriers, then scheduling flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple DCI messages into a single DCI message that schedules data transmissions across multiple component carriers. This merging approach reduces the total number of DCI messages transmitted over the air interface, thereby reducing signaling overhead while maintaining the ability to schedule multiple carriers simultaneously. The single DCI message includes resource allocation information for multiple component carriers, achieving consolidation without sacrificing scheduling capability.
Solution Approach 2:
The patent creates a universal DCI message format that can schedule data transmissions on multiple component carriers simultaneously. This multi-functional DCI structure replaces the need for separate DCI messages for each carrier, allowing a single control message to perform the scheduling function across multiple carriers. The universal format includes fields for resource allocation, modulation and coding scheme, and other parameters applicable to multiple component carriers.
2Adaptability or versatility
If multiple DCI messages are transmitted for multi-carrier scheduling, then carrier-specific control is improved, but network reliability decreases
Solution Approach 1:
The patent merges multiple DCI messages into a single DCI message to improve network reliability. By reducing the number of separate messages transmitted over the air interface, the probability of successful delivery increases since there are fewer opportunities for transmission errors, collisions, or failures. The single consolidated DCI message ensures that scheduling information reaches the user equipment reliably, maintaining carrier-specific control while enhancing overall network reliability.
3Manufacturing precision
If multiple DCI messages are used for scheduling, then resource allocation precision is improved, but spectral efficiency is reduced
Solution Approach 1:
The patent combines multiple DCI messages into a single message that maintains precise resource allocation across multiple component carriers. The consolidated DCI includes detailed resource allocation fields for each scheduled carrier, preserving the precision needed for efficient resource management. By transmitting all this information in a single message rather than multiple separate messages, the patent improves spectral efficiency while maintaining allocation precision.
Solution Approach 2:
The patent changes the structure and parameters of the DCI message to accommodate multiple component carriers within a single message format. This includes modifying the message to include resource allocation parameters, modulation and coding scheme indicators, and other scheduling information for multiple carriers. By optimizing these parameters and fields within the unified DCI structure, the patent achieves both precise resource allocation and improved spectral efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station over a set of component carriers according to a carrier aggregation configuration. In some cases, the UE may receive an indication of one or more groups of units, where each group may include one or more component carriers and/or one or more time intervals of each component carrier. The UE may receive downlink control information (DCI) including one or more fields that are common to a group of units that may schedule a set of data transmissions over the one or more groups of units such that the single DCI may schedule multiple component carriers (e.g., two or more) over one or more time intervals. The UE may transmit or receive the set of data transmissions (e.g., uplink or downlink data transmissions) over the scheduled units based on receiving the DCI.