PUSCH Scheduling Feedback for NB-IoT Uplink Resource Allocation
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Solution Overview
Problem
In NB-IOT systems, the absence of Physical Uplink Control Channels (PUCCHs) prevents timely notification of downlink channel quality changes to the base station, hindering optimal scheduling by the eNodeB.
Innovation Solution
A terminal device acquires scheduling auxiliary information, such as CQI, PMI, RI, and RSRP, and transmits this information in a transport block through the Physical Uplink Shared Channel (PUSCH) to the base station, enabling better resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is used to avoid interference, then communication reliability is improved, but system complexity increases due to multiple downlink control information messages
Solution Approach 1:
The patent combines multiple downlink control information messages into a single unified message that contains scheduling information for multiple frequency hops. Instead of sending separate control messages for each frequency hop, the system transmits one control message that schedules multiple downlink transmissions across different frequencies, thereby reducing system complexity while maintaining communication reliability through frequency diversity.
Solution Approach 2:
The downlink control information message is designed to serve multiple functions simultaneously - it schedules not only the current downlink transmission but also anticipates and schedules future downlink transmissions on different frequencies. This multi-functional control message eliminates the need for separate control messages for each frequency hop, reducing overall system complexity while maintaining reliable communication across multiple frequencies.
2Reliability
If multiple downlink control information messages are transmitted, then frequency diversity is improved, but time consumption increases
Solution Approach 1:
The patent implements preliminary action by having the downlink control information message schedule future downlink transmissions in advance. The control message contains scheduling information for multiple frequency hops that will occur at different future time points, allowing the receiver to prepare for these transmissions ahead of time. This eliminates the need for sequential control messages and reduces overall time consumption while maintaining frequency diversity.
Solution Approach 2:
The patent ensures continuity of useful action by transmitting a single downlink control information message that continuously schedules multiple downlink transmissions across different frequencies and time points. Rather than interrupting communication with separate control messages for each frequency hop, the system maintains continuous scheduling information flow in one message, reducing time loss while preserving frequency diversity for reliable communication.
3Object-affected harmful factors
If frequency hopping is implemented, then interference avoidance is improved, but signal processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into multiple hopping frequencies and scheduling downlink transmissions at different time points. The single downlink control information message is segmented into scheduling information for multiple frequency hops, allowing the receiver to process each frequency segment independently. This segmentation approach simplifies signal processing by avoiding the need to handle multiple complex control messages simultaneously while maintaining interference avoidance through frequency diversity.
Data Source
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AI summary
A data transmission method, and a terminal, a base station and a computer-readable storage medium. The data transmission method comprises: a terminal acquiring scheduling auxiliary information (S100); and the terminal generating a transmission block carrying the scheduling auxiliary information, and sending the transmission block to a base station by means of a physical uplink shared channel, such that the base station allocates a scheduling resource to the terminal according to the scheduling auxiliary information (S200).