MIMO Pre-emption Indication for Multi-TRP Resource Management
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Solution Overview
Problem
In multi-TRP transmission, existing technologies face challenges in efficiently managing resource pre-emption indications for URLLC transmissions, particularly when there are insufficient resources for non-overlapping data transmission between eMBB and URLLC UEs.
Innovation Solution
The method involves transmitting downlink pre-emption configuration information to UEs, which includes indications for the start position of pre-emption indications within DCI, allowing UEs to accurately identify pre-empted resources across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data transmission to URLLC UE occupies resources scheduled to eMBB UE, then transmission delay for URLLC is reduced, but data transmission reliability for eMBB UE deteriorates
Solution Approach 1:
The network device performs preliminary action by sending pre-emption indication information to the eMBB UE before the URLLC data transmission actually occurs. This allows the eMBB UE to be notified in advance that its scheduled resources will be pre-empted, enabling it to take preliminary measures such as stopping decoding or preparing for retransmission, thus maintaining reliability while allowing the time-critical URLLC transmission to proceed
Solution Approach 2:
The pre-emption indication mechanism establishes a feedback loop where the network device monitors resource usage and transmission requirements, then provides feedback to the eMBB UE about upcoming pre-emption events. This feedback allows the eMBB UE to adjust its reception and processing accordingly, resolving the contradiction between allowing flexible resource pre-emption for low-latency traffic and maintaining reliable transmission for scheduled traffic
2Measurement precision
If pre-emption indication information is transmitted to UE, then resource management precision is improved, but downlink control information overhead increases
Solution Approach 1:
The pre-emption indication information is segmented into specific fields within the downlink control information structure. Rather than adding a separate complete message, the indication is divided into targeted bits or fields that only convey the necessary pre-emption status and resource identification, reducing overhead while maintaining precision
Solution Approach 2:
The pre-emption indication is applied locally to specific resource blocks, time slots, or frequency resources rather than globally to all resources. This allows the system to provide precise resource management information only where pre-emption occurs, avoiding unnecessary control information overhead for resources that are not affected
Data Source
AI summary
Embodiments of the present disclosure relate to a method and apparatus for Multiple-Input Multiple-Output (MIMO) communication. According to an embodiment of the present disclosure, a method can include: transmitting downlink pre-emption configuration information to a user equipment (UE), wherein the downlink pre-emption configuration information comprises a first indication indicating a start position of a first pre-emption indication within first downlink control information (DCI); transmitting the first DCI comprising the first pre-emption indication to the UE. Embodiments of the present disclosure provide methods for pre-emption indication in multi-TRP transmission.