RA Preamble Group Configuration for Wireless Data Transmission
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Solution Overview
Problem
In wireless communication systems, there is a challenge in efficiently transmitting data units using the random access (RA) procedure, particularly due to limited radio resources and the need to manage latency effectively.
Innovation Solution
The method involves configuring two RA preamble groups, one indicating that a RA Response (RAR) is not required and the other indicating that a RAR is required. The user equipment (UE) selects the appropriate preamble group based on whether a response from the network is needed for the transmitted data unit and transmits the selected RA preamble with the data unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits data unit using RA procedure and monitors RAR from network, then the UE can receive acknowledgment of data transmission, but the UE power consumption increases and radio resources are wasted
Solution Approach 1:
The patent changes the parameter of RAR monitoring behavior based on the data unit characteristics. When the data unit does not require retransmission, the UE changes the monitoring parameter to false, avoiding RAR reception and saving power. When retransmission is required, the UE sets monitoring to true to ensure reliable delivery.
Solution Approach 2:
The patent makes the RAR monitoring behavior dynamic rather than static. The UE dynamically adjusts whether to monitor RAR based on real-time assessment of data unit characteristics and retransmission requirements, optimizing power consumption while maintaining necessary reliability.
2Reliability
If the network transmits RAR response message, then the UE can receive acknowledgment of data transmission, but radio resources are consumed
Solution Approach 1:
The patent changes the parameter of RAR transmission at the network side based on data unit characteristics. When the data unit does not require retransmission, the network changes the transmission parameter to false, avoiding RAR message transmission and saving radio resources. When retransmission is required, the network transmits RAR to ensure reliable delivery.
Solution Approach 2:
The patent makes the RAR transmission behavior dynamic. The network dynamically adjusts whether to transmit RAR based on real-time assessment of data unit characteristics, optimizing radio resource utilization while maintaining necessary acknowledgment functionality.
3Reliability
If the UE monitors RAR from network after data transmission, then the UE can detect successful transmission, but transmission latency increases
Solution Approach 1:
The patent changes the monitoring parameter based on data unit characteristics. For data units where quick transmission is prioritized and retransmission is not required, the UE changes monitoring to false, reducing latency. For data units requiring reliable delivery, monitoring is enabled to detect successful transmission.
Solution Approach 2:
The patent implements dynamic monitoring behavior that adapts to different data transmission scenarios. The UE dynamically switches between monitoring and non-monitoring states based on real-time requirements, optimizing the balance between reliability detection and latency reduction.
Data Source
AI summary
The present invention relates to a method of transmitting a data unit using a Random Access (RA) procedure by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of configuring a first RA preamble group and a second RA preamble group, wherein RA preambles belonging to the first RA preamble group indicates that a RA Response (RAR) is not required and RA preambles belonging to the second RA preamble group indicates that the RAR is required; selecting one of the first preamble group and the second RA preamble group based on whether a response of the transmitted data unit from a network is required or not; and transmitting one of the RA preambles belonging to the selected RA preamble group with the data unit to the network.