Downlink Control Information for Uplink Interruption Indication
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Solution Overview
Problem
Existing communication technologies do not provide downlink control information to indicate which time-frequency resources carrying uplink data are interrupted by a terminal equipment of higher priority, leading to ineffective indication to lower priority terminal equipment when uplink data transmission is interrupted.
Innovation Solution
The proposed solution involves methods and apparatuses for transmitting and receiving downlink control information (DCI) in a communication system, where the network device transmits DCI to indicate interrupted time-frequency resources used for uplink data transmission to terminal equipment of lower priority, thereby enabling effective indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink control information is not transmitted to indicate interrupted uplink time-frequency resources, then the system maintains simplicity in control signaling, but lower priority terminal equipment cannot effectively identify when their uplink data transmission is interrupted
Solution Approach 1:
The patent applies universality by using the existing DCI format (specifically DCI format 2_2) that was originally designed for downlink resource interruption indication, and extending it to also indicate uplink resource interruptions. This allows a single control mechanism to serve multiple functions - indicating both downlink and uplink interruptions - thereby improving reliability without proportionally increasing system complexity
Solution Approach 2:
The patent introduces a specific field (first field) within the DCI structure that is dedicated to indicating uplink time-frequency resource positions. This local quality approach adds targeted functionality to the specific part of the control signaling that needs it, rather than redesigning the entire DCI structure, thus balancing reliability improvement with controlled complexity increase
2Adaptability or versatility
If a specific DCI format is defined to indicate interrupted downlink resources, then low-priority terminal equipment can demodulate transmission data blocks, but no similar mechanism exists for uplink data transmission interruptions
Solution Approach 1:
The patent extends the adaptability of DCI format 2_2 by configuring it to indicate both downlink and uplink time-frequency resource interruptions. The same DCI structure and transmission mechanism are made versatile to cover multiple interruption scenarios, improving indication coverage without requiring completely separate signaling mechanisms for each case
Solution Approach 2:
The patent applies inversion by taking the existing downlink interruption indication mechanism and inverting its application to also cover uplink interruptions. Instead of creating a entirely new mechanism, the existing DCI format is adapted to indicate uplink resource positions by appropriately configuring the field to represent uplink time-frequency resources, thereby achieving symmetry in indication capability
Data Source
AI summary
Methods and apparatuses for transmitting and receiving downlink control information and a communication system. The apparatus for transmitting downlink control information (DCI) includes: a first transmitter configured to transmit to a terminal equipment first DCI indicating an interrupted first time-frequency resource used for transmitting uplink data, the first DCI at least comprising a first field indicating a position of the first time-frequency resource.