Terminal Scheduling Request Adjustment for Uplink Grant Latency
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Solution Overview
Problem
The existing data transmission methods in communication technologies result in significant service interruption and user experience degradation due to prolonged time consumption in requesting an uplink grant, often taking around 6 seconds to re-establish the service when the maximum number of scheduling request transmissions is reached without obtaining a grant.
Innovation Solution
A method and system where a terminal adjusts the maximum number of scheduling request (SR) and preamble transmissions based on the priority of data to be transmitted, allowing for a quicker re-request of the uplink grant resource, thereby reducing service interruption duration and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal transmits SR according to the maximum number of SR transmissions configured by the base station, then the terminal can request UL grant resource, but the service interruption time is prolonged to about 6 seconds
Solution Approach 1:
The terminal dynamically adjusts the maximum number of SR transmissions based on data priority. For high-priority data, the terminal reduces the maximum SR transmission count and initiates random access earlier, transforming the fixed configuration into a dynamic adaptation mechanism that resolves the contradiction between reliable grant acquisition and time loss.
Solution Approach 2:
The terminal changes the parameter of maximum SR transmissions from a fixed network-configured value to a variable that depends on data priority. This parameter change enables the system to switch between different transmission strategies (standard SR vs. accelerated random access) based on service requirements, reducing service interruption time for high-priority data.
2Loss of time
If the terminal reduces the maximum number of SR transmissions to reduce service interruption time, then the time consumption decreases, but the terminal may fail to obtain UL grant resource
Solution Approach 1:
The terminal performs preliminary assessment of data priority before SR transmission. For high-priority data, the terminal pre-determines to use reduced SR transmissions and switch to random access, preparing the fallback mechanism in advance to ensure both time reduction and grant acquisition reliability.
Solution Approach 2:
The terminal introduces data priority as an intermediary criterion that mediates between SR transmission persistence and random access switching. This intermediary enables intelligent decision-making that balances the contradiction between reducing service interruption time and ensuring UL grant acquisition success.
3Adaptability or versatility
If the terminal initiates random access request when SR transmissions reach maximum, then the terminal can re-request UL grant resource, but the overall time consumption is still about 6 seconds
Solution Approach 1:
The terminal dynamically selects between SR-based grant request and random access-based grant request based on data priority. For high-priority data, the terminal accelerates the transition to random access, making the system adaptive to different service requirements and reducing service establishment latency while maintaining flexibility.
Solution Approach 2:
The terminal segments the UL grant request process into two distinct paths: standard SR transmission path for low-priority data and accelerated random access path for high-priority data. This segmentation allows the terminal to choose the appropriate path based on data priority, reducing overall time consumption while maintaining adaptability.
Data Source
AI summary
A method for data transmission, a terminal, and a chip are provided. The method for data transmission is performed by a terminal. The method for data transmission includes: receiving scheduling request (SR) configuration information transmitted by a base station (BS), where the SR configuration information contains a maximum number of SR transmissions; adjusting the maximum number of SR transmissions according to a priority of data to-be-transmitted; and transmitting an SR to request an uplink (UL) grant resource for transmission of the data to-be-transmitted, and initiating a random access request to re-request the UL grant resource in response to a number of SR transmissions reaching the maximum number of SR transmissions.