Multi-Carrier Frequency Resource Assignment with Fixed DCI Payloads
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently handling frequency domain resource assignment for uplink and downlink transmissions scheduled by a single DCI, particularly when multiple carriers are involved, leading to increased signaling overhead and uncertainty in payload size determination.
Innovation Solution
A method and apparatus for frequency domain resource assignment on multiple carriers using a single DCI, where a UE determines the payload size and resource blocks based on a DCI format, and a BS configures carriers and transmits/receives transmissions accordingly, employing virtual carriers or active BWPs to combine and number RBs efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single DCI schedules multiple carriers, then signaling overhead is reduced, but payload size determination becomes uncertain
Solution Approach 1:
The patent changes the parameter of DCI payload size determination from dynamic calculation to fixed predetermined size. By defining that the payload size equals the maximum payload size required for scheduling any single configured carrier, the system eliminates uncertainty in payload size while maintaining the benefit of single-DCI multi-carrier scheduling, thus resolving the contradiction between reduced signaling overhead and accurate payload size determination
2Productivity
If multiple carriers are scheduled by a single DCI, then spectrum efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the multi-carrier scheduling problem into two parts: configuration phase where carriers are pre-configured and grouped, and execution phase where a single DCI schedules multiple carriers using predetermined payload sizes. This segmentation reduces real-time scheduling complexity while maintaining high spectrum efficiency through multi-carrier operation
Solution Approach 2:
The patent applies preliminary action by pre-configuring carriers and determining payload sizes before actual scheduling occurs. The base station pre-establishes the relationship between DCI formats and carrier configurations, so that during operation, the UE can directly use predetermined payload sizes without complex real-time calculations, thus reducing device complexity while maintaining productivity
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for frequency domain resource assignment on multiple carriers scheduled by a single DCI. According to some embodiments of the disclosure, a UE may: determine a payload size of a DCI format, wherein the DCI format schedules a first plurality of carriers of a second plurality of carriers, wherein the second plurality of carriers is configured by a BS; receive, from the BS, the DCI format according to the determined payload size, wherein the first plurality of carriers is indicated by a first indicator of the DCI format or is configured by the BS; determine RBs assigned on the first plurality of carriers based on the DCI format; and receive downlink transmissions on the assigned RBs in the case that the DCI format schedules the downlink transmissions, or transmit uplink transmissions on the assigned RBs in the case that the DCI format schedules the uplink transmissions.