Scheduling Signaling HARQ Process Expansion via Subframe Mapping
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Solution Overview
Problem
The existing LTE systems face limitations in the number of HARQ processes that can be supported by single-subframe scheduling signaling, leading to insufficient processes and potential misunderstandings and incorrect data transmission due to overlapping scheduling information.
Innovation Solution
A method that determines a transport block according to a HARQ process number field and subframe number in scheduling signaling, allowing for increased HARQ processes or transport blocks in single-subframe or multi-subframe scheduling without increasing scheduling signaling overheads, by using different physical uplink channels for feedback and employing scrambling codes to distinguish between single-subframe and multi-subframe scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-subframe scheduling signaling is used to transmit retransmission scheduling information, then the scheduling process is simple, but subframe overlap occurs causing user equipment misunderstanding and incorrect data transmission
Solution Approach 1:
The patent segments the scheduling signaling into two distinct types: single-subframe scheduling signaling and multi-subframe scheduling signaling. Each type uses different physical uplink channels for feedback (PUCCH for single-subframe, PUSCH for multi-subframe), which prevents overlap and misunderstanding. This segmentation allows the system to maintain simple processing for each type while avoiding the reliability issues caused by mixing them.
2Quantity of substance
If multiple HARQ processes are determined according to process numbers and HARQ process fields, then the number of supported processes increases, but scheduling signaling overhead increases
Solution Approach 1:
The patent extracts the HARQ process number information from the scheduling signaling itself and determines it based on the subframe number and a predefined correspondence relationship. This extraction removes the need to explicitly transmit HARQ process numbers in the scheduling signaling, thereby increasing the number of supportable HARQ processes without increasing signaling overhead.
Solution Approach 2:
The patent changes the parameter representation by using subframe numbers (which have more available values) instead of explicit HARQ process numbers in the signaling. The correspondence between subframe numbers and HARQ process numbers is predetermined, allowing the system to support more processes while using the same signaling bit width.
3Quantity of substance
If single-subframe scheduling signaling supports more HARQ processes, then the quantity of processes increases, but the maximum number of processes remains limited by current system design
Solution Approach 1:
The patent makes the scheduling system universal by enabling it to handle both single-subframe and multi-subframe scheduling through a unified framework. The same physical downlink control channel can carry both types of scheduling information, and the user equipment can distinguish between them using the feedback channel differentiation, thereby increasing adaptability while supporting more HARQ processes.
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies, and provide a method for transmission by using scheduling signaling, and an apparatus, which can avoid a problem of insufficient processes, increase a quantity of processes that can be supported by scheduling signaling, and increase HARQ processes or transport blocks in a HARQ process that can be used in single-subframe scheduling or multi-subframe scheduling, without increasing scheduling signaling overheads. The method specifically includes: receiving, by user equipment UE, scheduling signaling sent by a base station, where the scheduling signaling includes a HARQ process number field; acquiring a subframe number of a subframe scheduled by using the scheduling signaling; determining a transport block according to the HARQ process number field and the subframe number; and processing data in the transport block. The present invention is applied to scheduling signaling transmission.