Two-Stage DCI Scheduling for Unified Uplink Control Reporting
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Solution Overview
Problem
Mobile communication systems face challenges in understanding the environment to optimize RF beam steering and mitigate interference from objects obstructing direct propagation paths, necessitating improved sensing technologies.
Innovation Solution
A method involving two-stage downlink control information (DCI) is employed for integrated sensing and communication, enabling flexible resource indication and simultaneous scheduling of downlink data and uplink local information, with separate channels for different types of uplink control information and local traffic, allowing for agile UL control and flexible activation/deactivation of reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single DCI format is used for scheduling, then the control signaling structure is simple, but it cannot flexibly indicate separate resources for UCI feedback and UL local traffic transmission
Solution Approach 1:
The DCI is divided into two separate formats: DCI format 1_0 for basic downlink scheduling and DCI format 1_1 for enhanced scheduling with unified uplink control information. This segmentation allows each format to be optimized for specific purposes, with format 1_1 containing additional fields for indicating both PUCCH and PUSCH resources, thereby achieving flexible resource indication without requiring complex modifications to the basic DCI structure.
Solution Approach 2:
The patent introduces a new dimension to the DCI structure by adding a second stage of resource indication. The first DCI format 1_0 provides basic scheduling, while the second DCI format 1_1 provides additional resource indications in a separate dimension. This two-stage approach allows independent optimization of each DCI format's functionality without increasing the complexity of either individual format.
2Adaptability or versatility
If separate channels are used for UCI and UL local traffic, then resource allocation flexibility is improved, but channel management complexity increases
Solution Approach 1:
The patent creates a unified uplink control information channel that serves multiple functions. The PUSCH indicated in DCI format 1_1 can carry both traditional UL data and UCI feedback, while the PUCCH carries other control information. This multi-functional channel design allows flexible resource allocation where the same physical channel resources can be dynamically assigned for different purposes based on network conditions and traffic requirements.
Solution Approach 2:
The channel allocation is made dynamic through the two-stage DCI mechanism. The first DCI format 1_0 provides initial scheduling, and the second DCI format 11 provides dynamic adjustments and additional resource indications. This dynamic approach allows the system to adapt channel allocation in real-time based on varying traffic conditions, improving flexibility while maintaining manageable complexity through structured dynamic control.
3Measurement precision
If two-stage DCI is implemented, then resource allocation precision is improved, but processing overhead increases
Solution Approach 1:
The first DCI format 1_0 provides preliminary scheduling information that prepares the UE for upcoming transmissions. This preliminary action includes basic resource allocation and modulation and coding scheme indications. The second DCI format 11 then provides refined resource indications and additional control parameters. This two-stage preliminary action approach allows precise resource allocation to be achieved incrementally, reducing the immediate processing burden compared to receiving all detailed information in a single DCI.
Solution Approach 2:
Each DCI format is optimized for its specific function with locally appropriate detail level. DCI format 11 contains detailed resource indication fields for precise PUCCH and PUSCH allocation, while DCI format 11 contains more general scheduling information. This local quality optimization ensures that processing overhead is distributed appropriately, with each stage handling the level of detail necessary for its specific purpose, thereby improving overall precision without excessive processing burden.
Data Source
AI summary
Communication systems, apparatuses, methods, and one or more non-transitory computer-readable storage devices. The method comprises generating a first downlink control information (DCI) and a second DCI for notifying a device regarding resources for subsequent transmission which includes transmission of: (a) first information including at least one of hybrid automatic repeat request acknowledgement and uplink local information (ULI), and (b) second information of uplink and/or downlink information. The ULI includes uplink local traffic (including local information to be interpreted within the RAN) and/or uplink control information related thereto. The first DCI includes information for the second DCI which includes a first indication of resources for the second DCI. The second DCI includes at least a first portion of information for the subsequent transmission which includes a second indication of resources for the first information and a third indication of resources for the second information.