Wireless Communication PDU Reordering Timer Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in the Unacknowledged Mode (UM) of LTE, the existing reordering timer has a single duration, limiting flexibility and leading to potential losses of Radio Link Control (RLC) Protocol Data Units (PDUs) due to out-of-order arrivals, which affects the reassembly of data and increases reordering delays.
Innovation Solution
A method and apparatus that determine a target duration for timers based on the data type of PDUs, allowing for multiple timers to be started simultaneously for different data types, enabling flexible waiting periods for each PDU to improve detection of lost PDUs and enhance reordering efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single duration timer is used for reordering, then the system structure is simple, but the flexibility of wireless communication is low
Solution Approach 1:
The patent segments the single reordering timer into multiple timers (t_Reordering_1, t_Reordering_2, etc.), each with different durations corresponding to different data types or service requirements. This allows the system to select appropriate timer durations based on specific communication needs, thereby improving flexibility without significantly complicating the overall system structure.
Solution Approach 2:
The patent introduces dynamic timer selection where the reordering timer duration is not fixed but can be adjusted based on data type, service requirements, and communication conditions. This dynamic adaptation enables the system to optimize performance for different scenarios while maintaining a relatively simple underlying timer mechanism.
2Loss of time
If a single duration timer is used for reordering, then the timer management is simple, but the reordering delay increases
Solution Approach 1:
The patent applies different timer durations to different data types or service categories based on their specific requirements. Critical data with strict timing requirements uses shorter timers to minimize delay, while less time-sensitive data uses longer timers. This localized optimization reduces overall reordering delays without requiring complex global timer management.
Solution Approach 2:
The patent changes the timer duration parameter based on data type and service requirements, allowing the system to optimize reordering delay for different communication scenarios. By adjusting this key parameter dynamically, the system achieves faster reordering for time-sensitive data while maintaining simplicity in timer management through standardized selection criteria.
3Reliability
If a single duration timer is used for reordering, then the system is easy to operate, but the data loss likelihood increases
Solution Approach 1:
The patent segments the reordering detection process into multiple timer-based mechanisms, each optimized for different data types. This segmentation improves data loss detection reliability by ensuring that critical data receives appropriate attention with suitable timer durations, while maintaining ease of operation through automated timer selection and management.
Data Source
AI summary
Disclosed in embodiments of the present disclosure are a method and apparatus for wireless communication. The method comprises: a receiving end determines that at least one protocol data unit (PDU) is not received between a first PDU and a second PDU; the receiving end determines a target time length of a timer according to the data type of the at least one PDU; the receiving end starts the timer and waits for the at least one PDU within the target time length. The method and apparatus in the embodiments of the present disclosure are favorable for improving the flexibility of wireless communication.