Uplink Scheduling Information for Flexible Data Transmission Consensus
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Solution Overview
Problem
In 5G and future communications systems, the existing acknowledgement information transmission method is not flexible enough, leading to errors when the base station decodes uplink data due to a lack of consensus on the quantity of acknowledgement information between the base station and the terminal device, especially with flexible data sending mechanisms.
Innovation Solution
The proposed method involves the base station sending uplink scheduling information that includes indications for both the quantity of second and third downlink data packets, allowing the terminal to feed back acknowledgement information based on a maximum quantity, ensuring consensus on acknowledgement information sent, thereby avoiding errors in data decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station sends downlink data packets flexibly after the UL grant, then the adaptability of data transmission is improved, but the base station and terminal device fail to reach consensus on the quantity of downlink data packets, causing decoding errors
Solution Approach 1:
The base station performs preliminary action by indicating the maximum quantity of downlink data packets that can be sent after the UL grant in the uplink scheduling information. This preliminary indication allows the terminal device to pre-calculate the quantity of ACK/NACK information to be fed back, ensuring both parties reach consensus before the actual flexible data transmission occurs, thus resolving the contradiction between transmission flexibility and reliability.
2Reliability
If the base station indicates the maximum quantity of downlink data packets in the UL grant, then the consensus on acknowledgement information quantity is improved, but the uplink scheduling information becomes more complex
Solution Approach 1:
The invention changes the parameter representation by using a maximum quantity indication in the UL grant rather than indicating each downlink data packet individually. This parameter change simplifies the uplink scheduling information structure while still providing sufficient information for the terminal to calculate the ACK/NACK quantity, thus resolving the contradiction between reliability improvement and complexity increase.
Data Source
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AI summary
An acknowledgement information sending, an acknowledgement information receiving method, a terminal device, a network device, and a system are provided. The sending method includes: receiving, by a terminal device, uplink scheduling information from a network device in a time cell n, where the uplink scheduling information is further used to obtain a maximum quantity of first downlink data packets sent by the network device to the terminal device from a time cell n-k3 to a time cell n+k2; and sending, by the terminal device, acknowledgement information of the first downlink data packet to the network device on a physical uplink shared channel in a time cell n+k1 based on the maximum quantity of the first downlink data packets. In this way, a base station and a terminal reach consensus on a quantity of pieces of acknowledgement information fed back by the terminal to the base station on the PUSCH of the time cell n+k1. Therefore, when the acknowledgement information is sent on the PUSCH, a data reception error caused by a case in which the base station does not know, when decoding the data, a quantity of pieces of acknowledgement information actually sent by the terminal is avoided.