DM-RS Bundling and TB Scheduling Across Transmission Occasions
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing joint channel estimation and scheduling of transport blocks across multiple transmission occasions, leading to suboptimal performance in demodulation reference signal bundling.
Innovation Solution
Configuring demodulation reference signal bundling and transport block scheduling by enabling joint channel estimation across a specified time-domain window length and allowing single transport block scheduling across multiple transmission occasions, with specific indications and configurations for duration and number of transmission occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint channel estimation is performed across multiple transmission occasions, then channel estimation accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the channel estimation process by introducing DM-RS bundling groups that divide multiple transmission occasions into manageable units. Each bundling group contains a specific number of transmission occasions (indicated by parameter dmrs-BundlingGroupSize) over which joint channel estimation is performed, while maintaining separate estimation for different groups. This segmentation allows the system to achieve improved channel estimation accuracy within each group without overwhelming system complexity across all transmissions.
Solution Approach 2:
The patent implements dynamic configuration of DM-RS bundling parameters through RRC signaling, allowing the network to adaptively adjust the bundling group size and time-domain window length based on channel conditions and traffic requirements. The parameter dmrs-TimeDomainWindowLength indicates the duration of the time-domain window for DM-RS bundling, enabling flexible optimization between estimation accuracy and complexity trade-offs in different operational scenarios.
2Productivity
If single transport block scheduling is enabled across multiple transmission occasions, then resource allocation efficiency is improved, but reliability requirements increase
Solution Approach 1:
The patent merges multiple transmission occasions into a single transport block scheduling framework, where one transport block is scheduled across multiple PUSCH transmissions. This is achieved through the parameter nrofTransmissionOccasions which indicates the number of transmission occasions for a single transport block. By combining resources across occasions, the system improves resource allocation efficiency while maintaining unified HARQ-ACK feedback mechanisms to ensure reliability.
Solution Approach 2:
The patent implements unified HARQ-ACK feedback for transport blocks scheduled across multiple transmission occasions. The network receives a single HARQ-ACK response that applies to the entire multi-occasion transmission, enabling efficient retransmission control. This feedback mechanism ensures that reliability requirements are met by providing comprehensive acknowledgment for the aggregated transmission resources.
3Reliability
If phase continuity and power consistency are maintained across transmission slots, then communication performance is enhanced, but control complexity increases
Solution Approach 1:
The patent controls phase continuity and power consistency by adjusting key transmission parameters including dmrs-TimeDomainWindowLength (time-domain window length for DM-RS bundling), dmrs-BundlingGroupSize (size of DM-RS bundling groups), and power control parameters like p0-PUSCH and alpha. These parameter changes enable the system to maintain phase and power consistency across transmission occasions within bundling groups without requiring complex real-time control mechanisms.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring demodulation reference signal bundling and transport block scheduling. One method includes receiving a first configuration from a network. The first configuration includes: a first indication to enable demodulation reference signal (DM-RS) bundling for a physical channel; a second indication of a duration for a time-domain window (TDW) length for DM-RS bundling, wherein the duration of the TDW indicates a number of symbols across which joint channel estimation is performed; or a combination thereof. The method includes receiving a second configuration from the network. The second configuration includes: a third indication to enable a single transport block (TB) scheduling across multiple transmission occasion for a physical channel; and a fourth indication of a number of transmission occasion over which a single transport block is transmitted, received, or a combination thereof.