Terminal Skip Uplink Transmission MAC PDU Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmissions, particularly when there is no data to be transmitted, leading to unnecessary resource allocation and power control issues due to the requirement for padding MAC PDUs, which affects system performance and resource utilization.
Innovation Solution
The implementation of a method and apparatus that allows terminals in a wireless communication system to skip uplink transmissions when there is no data to be sent, by configuring the RRC reconfiguration message to include skip uplink transmission information, thereby avoiding the generation of MAC PDUs with only padding buffer status reports, and allocating uplink grants only when meaningful data is available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink transmission is performed whenever an uplink grant is received, then reliable data transmission is ensured, but unnecessary transmissions occur when no data is available, leading to wasted resources and increased power consumption
Solution Approach 1:
The patent applies partial action by conditionally performing uplink transmission only when necessary. The terminal checks whether there is actual data to transmit before sending, rather than always transmitting when granted. This avoids excessive action (unnecessary transmissions) while maintaining reliability for actual data, resolving the contradiction between transmission reliability and energy waste.
2Productivity
If MAC PDU is generated for every uplink grant, then transmission resources are fully utilized, but padding MAC PDUs with only buffer status reports consume resources without transmitting meaningful data
Solution Approach 1:
The patent extracts and removes the harmful element (padding MAC PDU generation) from the system. When no data is available for transmission, the terminal skips generating padding MAC PDUs entirely, even when an uplink grant is received. This extraction of the unnecessary padding generation process eliminates waste of transmission resources while maintaining full utilization of resources for actual data transmissions.
3Reliability
If power control is performed for every uplink transmission, then transmission quality is maintained, but power control operations are unnecessarily executed when no data is transmitted
Solution Approach 1:
The patent applies partial action by conditionally executing power control operations only when actual data transmission occurs. The terminal performs power control adjustments only for meaningful uplink transmissions, not for padding transmissions. This reduces the overhead and complexity of power control operations while maintaining transmission quality for actual data, resolving the contradiction between reliability and operational complexity.
Data Source
AI summary
Methods and devices in a wireless communication system are provided. A method includes receiving, from a base station, a radio resource control (RRC) reconfiguration message configuring a medium access control (MAC) parameter for the terminal; identifying an uplink grant for a MAC protocol data unit (PDU); identifying that skip uplink transmission information indicating for the terminal to skip an uplink transmission is configured in the RRC reconfiguration message and that the uplink grant is addressed to a cell-radio network temporary identifier (C-RNTI) or is a configured uplink grant; and skipping a generation of the MAC PDU for the uplink grant, in case that a MAC service data unit (SDU) for the MAC PDU does not exist, and the MAC PDU includes only a padding buffer status report (BSR).