PUSCH Repetition Timing Allocation With Low Signaling Overhead
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Solution Overview
Problem
Existing communication systems, particularly in 5G NR, face limitations in supporting flexible transport block repetitions without incurring additional signaling overhead, which is crucial for achieving ultra-reliability and low latency in services like URLLC and mMTC.
Innovation Solution
Implementing a mechanism for flexible transport block repetitions that allows for varying timing without requiring additional signaling overhead, by utilizing RRC configured tables with additional values to specify resource allocations for repetitions, rather than relying solely on pre-specified timing relations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pre-specified timing relations are used for transport block repetitions, then signaling overhead is reduced, but flexibility in supporting repetitions is limited
Solution Approach 1:
The patent configures tables in advance that contain multiple values for timing parameters (K2, SLIV, etc.). These pre-configured tables allow the system to select appropriate timing relations without additional signaling, as the options are already available from preliminary configuration.
Solution Approach 2:
The patent enables dynamic selection of timing parameters by allowing different values within configured tables to be used for different repetitions. This dynamic approach provides flexibility in adapting to varying channel conditions and service requirements while maintaining efficient signaling through the use of pre-configured options.
2Adaptability or versatility
If additional signaling overhead is introduced to support flexible repetitions, then adaptability improves, but system efficiency deteriorates
Solution Approach 1:
The patent creates multi-functional configured tables that serve multiple purposes: they define both initial PUSCH transmission timing and repetition timing parameters. This universal configuration approach allows the same signaling structure to support both single transmissions and repeated transmissions with flexible timing, eliminating the need for separate signaling mechanisms.
Solution Approach 2:
The patent enables flexible parameter selection by configuring multiple values for timing parameters (K2, SLIV, etc.) within the same configuration structure. The system can dynamically change which parameter values are applied to different repetitions based on channel conditions and service requirements, providing adaptability without additional signaling overhead.
3Reliability
If strict timing relations are enforced for repetitions, then system complexity is reduced, but reliability and latency performance worsen
Solution Approach 1:
The patent pre-configures multiple timing parameter options in tables during connection setup or reconfiguration phases. This preliminary configuration eliminates the need for complex real-time timing negotiations, as both transmitter and receiver have advance knowledge of available timing options, simplifying real-time operation while supporting reliable low-latency communications.
Solution Approach 2:
The patent enables dynamic adaptation of timing parameters for repetitions based on channel conditions and service requirements. By allowing flexible selection from pre-configured options, the system can optimize reliability and latency for URLLC services without requiring complex real-time signaling or coordination mechanisms.
Data Source
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AI summary
The present disclosure relates to a mobile terminal, a system and respective methods. The user equipment receives a physical uplink shared channel, PUSCH, config information element, IE, in form of radio resource control, RRC, signalling, the PUSCH config IE being applicable to a particular bandwidth part; configures a table which is defined by a PUSCH time domain resource allocation list IE carried in the received PUSCH config IE, the table comprising rows, each with a value indicating a PUSCH mapping type, a value K2 indicating a slot offset, and a value SLIV indicating a start and length indicator; receives downlink control information, DCI, in form of medium access control, MAC, signalling carrying a time-domain resource assignment field with value m, wherein the value m provides a row index m+1 to the RRC configured table, determines allocated resources for an initial PUSCH transmission and allocated resources for at least one repetition thereof based on: a number of a slot carrying the received DCI, and the value K2 indicating the slot offset, and the value SLIV indicating the start and length indicator comprised in indexed row of the RRC configured table; and transmits a PUSCH transmission using the respectively determined allocated resources for the initial PUSCH transmission and for the at least one repetition thereof; and wherein the determination of allocated resources is based on at least one additional value comprised in the indexed row of the RRC configured table which is specifying the allocated resources in time domain for the at least one repetition of the initial PUSCH transmission.