Base Station PUCCH Format for Wireless Latency Reduction
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Solution Overview
Problem
Current cellular communication systems face latency issues due to the need for round trips of uplink and downlink communication, which prolong the time required for data transmission preparation, especially in real-time communication scenarios.
Innovation Solution
A base station apparatus and terminal apparatus configuration that utilizes a new physical uplink control channel (PUCCH) format to transmit scheduling requests with communication type information, allowing for simultaneous or preemptive grant transmission for buffer status reports and user data, reducing the need for multiple communication opportunities and thereby shortening data transmission preparation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional uplink control channel format is used to transmit scheduling requests, then the terminal can request data transmission, but the base station cannot identify communication type and must perform multiple round trips for buffer status report and grant transmission, increasing latency
Solution Approach 1:
The patent applies preliminary action by having the terminal apparatus transmit communication type information together with the scheduling request in advance. This allows the base station to prepare and transmit the grant for user data beforehand, eliminating the need for subsequent round trips and reducing overall communication preparation time.
Solution Approach 2:
The patent merges the transmission of scheduling request and communication type information into a single simultaneous action. By combining these two functions into one transmission opportunity, the system eliminates multiple sequential round trips and reduces the complexity of the communication procedure while maintaining reliability.
2Reliability
If multiple communication opportunities are used for buffer status report and user data grant transmission, then reliable data transmission can be ensured, but the time required for data transmission preparation is prolonged
Solution Approach 1:
The base station transmits the grant for user data in advance based on the communication type information received with the scheduling request. This preliminary transmission of the grant allows the terminal to prepare for data transmission without waiting for additional round trips, ensuring both reliability and reduced preparation time.
Solution Approach 2:
The system uses feedback mechanisms where the terminal provides communication type information in the scheduling request, and the base station responds with an appropriate grant. This feedback loop ensures reliable data transmission while minimizing the number of round trips needed through intelligent base station responses based on the communicated requirements.
Data Source
AI summary
A base station apparatus notifies a terminal apparatus connected to or trying to establish a connection with the base station apparatus of information indicating a physical uplink control channel (PUCCH) format that can be used to transmit a scheduling request and can include information indicating a communication type, selects a type of grant to transmit to the terminal apparatus from a plurality of types of grants on a basis of a communication type indicated in the scheduling request received from the terminal apparatus via the PUCCH format, and transmits the selected type of grant to the terminal apparatus as a response to the scheduling request.