Terminal Single DCI Multi-Cell Transport Block Reception
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Solution Overview
Problem
In a radio communication system, terminals face challenges in correctly receiving transport blocks from multiple cells when scheduled using single downlink control information, as existing technologies lack clear methods for mapping and receiving different or shared transport blocks across cells.
Innovation Solution
A terminal is equipped with a receiving unit for single control information and a control unit that can receive different, same, or partial transport blocks from multiple cells, using enhanced DCI formats to manage parameters like modulation and coding schemes, hybrid automatic repeat request processes, and repetition coefficients to ensure accurate reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single DCI is used to schedule multiple cells, then signaling overhead is reduced and scheduling efficiency is improved, but the terminal cannot correctly identify how transport blocks are mapped in each scheduled cell
Solution Approach 1:
The patent segments the transport block reception into three distinct types (different transport blocks, same transport block, or partial transport block) and uses specific DCI fields to indicate which type is being used. This segmentation allows the terminal to correctly identify the mapping without requiring separate DCI for each cell.
Solution Approach 2:
The patent introduces new parameters in the DCI format including a transport block assignment field and a code block group assignment field that change based on the scheduling type. These parameter changes enable the terminal to distinguish between different transport block mapping scenarios while using a single DCI.
2Adaptability or versatility
If single DCI schedules multiple cells with different transport blocks, then resource allocation flexibility is improved, but the terminal lacks clear methods to receive and manage the different transport blocks
Solution Approach 1:
The patent makes the DCI format dynamic by including fields that indicate whether different, same, or partial transport blocks are scheduled. The terminal adapts its reception operation based on these dynamic indicators, allowing flexible resource allocation while maintaining clear operational procedures.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of DCI fields (transport block assignment field and code block group assignment field) that mediate between the base station's scheduling decision and the terminal's reception operation. These intermediary fields translate the scheduling intent into actionable reception instructions.
3Productivity
If single DCI is used for cross-carrier scheduling, then frequency utilization efficiency is improved, but the terminal cannot correctly identify transport block mapping across carriers
Solution Approach 1:
The patent applies preliminary action by pre-defining three transport block mapping types and pre-configuring the DCI fields to indicate which type is used. This preliminary structuring allows the terminal to correctly identify the mapping without requiring complex real-time analysis, thereby maintaining precision in cross-carrier scheduling.
Data Source
AI summary
A terminal includes: a receiving unit receiving single control information for scheduling a plurality of cells; and a control unit receiving a transport block from the plurality of cells, based on the control information, in which the control unit: receives different transport blocks in each of the plurality of cells; receives a same transport block in each of the plurality of cells; or receives a part of a transport block in each of the plurality of cells.