Wireless Access Node PDU Size Negotiation
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Solution Overview
Problem
In wireless communication systems, the fixed protocol data unit (PDU) size employed by wireless access nodes can lead to high packet retransmissions, resulting in performance degradation due to packet loss and errors, and varying conditions such as signal noise and user device movement.
Innovation Solution
Wireless access nodes exchange performance metrics like retransmission rates and PDU sizes with neighboring nodes to dynamically adjust PDU sizes based on received metrics, optimizing PDU sizes for improved communication efficiency and minimizing retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed PDU size is employed by wireless access nodes, then device complexity is reduced and ease of operation is improved, but packet retransmissions increase and communication reliability deteriorates
Solution Approach 1:
The patent implements dynamic PDU size adjustment by allowing wireless access nodes to negotiate and adapt PDU sizes based on current radio link conditions. The system transitions from static fixed PDU sizes to dynamic adjustable PDU sizes, enabling the network to optimize packet sizes according to varying channel quality, mobility conditions, and traffic patterns, thereby reducing retransmissions while maintaining operational simplicity through automated negotiation protocols
Solution Approach 2:
The patent changes the PDU size parameter from a fixed value to a negotiable variable. Wireless access nodes exchange capability information and performance metrics to determine optimal PDU sizes, allowing the system to adapt packet sizes based on radio link quality, device capabilities, and network conditions. This parameter adaptation resolves the contradiction by enabling reliability improvement through optimized packet sizes without requiring complex manual configuration
2Reliability
If PDU sizes are dynamically adjusted based on wireless transmission metrics, then communication reliability is improved and retransmissions are reduced, but device complexity and system complexity increase
Solution Approach 1:
The patent implements feedback mechanisms where wireless access nodes exchange transmission metrics including retransmission rates, packet error rates, and radio link quality measurements. These feedback loops enable nodes to automatically adjust PDU sizes based on observed performance, improving reliability through data-driven optimization while keeping complexity manageable by using standardized metric exchange protocols and automated decision algorithms
Solution Approach 2:
The patent enables wireless access nodes to autonomously negotiate and adjust PDU sizes without requiring complex centralized control or manual intervention. Each node independently evaluates received metrics, determines optimal PDU configurations, and implements adjustments automatically. This self-service approach improves reliability through adaptive optimization while minimizing added complexity by distributing intelligence to individual nodes rather than requiring complex system-wide coordination
3Productivity
If negotiated PDU sizes are implemented among wireless access nodes, then productivity and communication efficiency are improved, but the complexity of coordination and negotiation protocols increases
Solution Approach 1:
The patent implements preliminary negotiation of PDU sizes during handover preparation phases, before actual data transmission begins. Wireless access nodes exchange capability information and agree on PDU configurations in advance, allowing seamless transitions and immediate use of optimized packet sizes. This preliminary action improves productivity by eliminating runtime negotiation overhead while managing coordination complexity through structured pre-established protocols
Solution Approach 2:
The patent creates a universal negotiation framework that handles multiple functions through a single protocol mechanism. The same negotiation infrastructure supports PDU size agreement, capability exchange, and performance metric sharing across different wireless access nodes and device types. This universal approach improves communication efficiency by providing consistent optimized packet sizes across the network while reducing coordination complexity through standardized multi-functional protocols rather than separate mechanisms for each function
Data Source
AI summary
Systems, methods, apparatuses, and software for operating a wireless access node are provided herein. In one example, a method includes providing wireless access from the wireless access node for one or more wireless devices using an initial protocol data unit (PDU) size for at least a portion of the wireless access. The method also includes receiving wireless transmission metrics transferred by a second wireless access node, and establishing a new PDU size for the portion of the wireless access at the wireless access node based at least on the wireless transmission metrics.