Multi-TRP Scheduling of eMBB and URLLC With Soft Combining
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Solution Overview
Problem
Existing 5G NR systems face challenges in efficiently scheduling mixed type traffics with different Quality of Service (QoS) requirements, such as eMBB and URLLC, without sacrificing spectral efficiency or throughput.
Innovation Solution
Scheduling mixed type traffics via multiple Transmission/Reception Points (TRPs) using a single or pair of Downlink Control Information (DCIs to manage eMBB and URLLC traffic simultaneously, allowing for soft combining of URLLC data from different TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple copies of URLLC data are transmitted from different TRPs to satisfy reliability requirements, then URLLC reliability is improved, but system complexity and resource overhead increase
Solution Approach 1:
The patent segments the URLLC data transmission by dividing it into multiple copies transmitted from different TRPs (Transmission Reception Points). Each TRP transmits a separate copy of the same data, allowing the UE to combine them for enhanced reliability. This segmentation approach enables parallel transmission paths while maintaining manageable complexity at each individual TRP.
Solution Approach 2:
The patent merges multiple transmissions of the same URLLC data from different TRPs at the UE side through soft combining. The UE receives multiple copies and combines them to achieve the desired reliability level. This merging occurs at the reception end rather than requiring complex coordination at the transmission end, thus reducing overall system complexity.
2Reliability
If multiple copies of URLLC data are transmitted from different TRPs, then URLLC reliability is improved, but resource overhead and spectral efficiency deteriorate
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure multiple TRPs with the same URLLC data before transmission. The data is prepared and staged at multiple TRPs in advance, allowing for rapid simultaneous transmission when needed. This preliminary preparation reduces the need for complex real-time coordination during actual transmission, optimizing resource usage.
Solution Approach 2:
The patent uses copying by creating multiple identical copies of the URLLC data and distributing them to different TRPs. Each TRP transmits a copy of the same data, ensuring that the UE receives redundant information for combining. This copying approach is more resource-efficient than transmitting different types of data, as the base data payload remains the same across all transmissions.
3Adaptability or versatility
If mixed type traffics (eMBB and URLLC) are scheduled simultaneously, then service versatility is improved, but scheduling complexity increases
Solution Approach 1:
The patent applies local quality by assigning different QoS parameters and transmission characteristics to different traffic types (eMBB and URLLC) locally at each TRP. Each TRP can independently configure its transmission parameters based on the specific QoS requirements of the traffic it is handling, rather than requiring centralized complex scheduling for all traffic types. This allows simultaneous support of multiple service types with differentiated quality requirements.
Solution Approach 2:
The patent implements universality by designing a scheduling framework that can handle multiple traffic types (eMBB, URLLC, and future services) through a common multi-TRP transmission mechanism. The same basic architecture and procedures are used across different service types, with only the QoS parameters needing adjustment. This multi-functional approach reduces overall scheduling complexity compared to having separate specialized systems for each service type.
Data Source
AI summary
Methods for scheduling mixed type traffics via multiple Transmission/Reception Points (TRPs) are provided. In embodiments disclosed herein, a base station provides, and a wireless device receives, a scheduling information for scheduling the mixed type traffics with different Quality of Service (QoS) requirements via multiple TRPs. In a non-limiting example, the mixed type traffics include an enhanced Mobile Broadband (eMBB) service and an Ultra-Reliable and Low Latency Communication (URLLC) traffic service, and the scheduling information can be conveyed in a single Downlink Control Information (DCI) or a pair of DCIs. As such, it is possible to enable efficient scheduling of both eMBB traffic and URLLC traffics simultaneously. As a result, it is possible to satisfy a reliability requirement of the URLLC service without sacrificing spectral efficiency and/or throughput of the eMBB service.