Dynamic MTU Adjustment for Enterprise CBRS Network Throughput
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Solution Overview
Problem
Current communication systems face inefficiencies due to the limitations of standard 1500-byte MTU in packet transmission, leading to increased overhead, packet fragmentation, and reduced throughput, especially in enterprise CBRS networks.
Innovation Solution
The method involves dynamically adjusting packet sizes and MTU settings on a per UE, per-flow, and per-direction basis, using higher MTU configurations up to 9000 bytes in enterprise CBRS networks, and dynamically switching between higher and lower MTU settings based on network conditions and UE capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger packets with higher MTU are used to increase payload-to-overhead ratio, then transmission efficiency is improved, but packet error rate increases leading to more retransmissions
Solution Approach 1:
The system dynamically adjusts MTU size based on real-time network conditions, UE capabilities, and radio link quality. The network can switch between different MTU configurations (e.g., 1500 bytes, 9000 bytes, or adaptive sizes) to optimize the balance between transmission efficiency and reliability under varying conditions.
Solution Approach 2:
The patent changes the MTU parameter adaptively based on network conditions, UE capabilities, and traffic characteristics. By adjusting this key parameter, the system optimizes packet size to achieve the desired balance between payload efficiency and error rate, preventing both excessive overhead and unnecessary retransmissions.
2Reliability
If smaller packets are used to reduce retransmission overhead, then reliability is improved, but payload-to-overhead ratio decreases reducing transmission efficiency
Solution Approach 1:
The system dynamically selects packet size based on current network conditions rather than using a fixed size. When radio link quality is good, larger packets are used to maximize payload efficiency. When error rates increase, the system automatically switches to smaller packets to reduce retransmission overhead, thus dynamically optimizing both reliability and efficiency.
Solution Approach 2:
The MTU parameter is adjusted based on measured network conditions including radio link quality, UE capabilities, and traffic patterns. This parameter change allows the system to adapt packet size to current conditions, achieving optimal balance between reliability and transmission efficiency without manual intervention.
3Adaptability or versatility
If fixed 1500-byte MTU is used to ensure compatibility, then device compatibility is improved, but network throughput is reduced due to increased overhead
Solution Approach 1:
The system transitions from a static 1500-byte MTU to a dynamic MTU selection mechanism that adapts to UE capabilities and network conditions. The network can negotiate and switch between different MTU sizes (1500, 9000, or adaptive values) based on real-time conditions, thus maintaining compatibility while maximizing throughput when conditions permit.
Solution Approach 2:
The MTU parameter is changed from a fixed value to an adaptive parameter that responds to UE capabilities, network conditions, and traffic characteristics. This allows the system to use larger MTU values (up to 9000 bytes or adaptive sizes) when compatibility permits and conditions are favorable, thereby increasing network throughput while maintaining fallback to 1500 bytes for compatibility requirements.
4Adaptability or versatility
If packet fragmentation is used to handle large packets, then MTU limitations are overcome, but transmission delays increase due to reassembly operations
Solution Approach 1:
The system performs preliminary actions by pre-negotiating and configuring appropriate MTU sizes before data transmission begins. By determining the optimal MTU in advance based on UE capabilities and network conditions, the system avoids the need for fragmentation and reassembly operations during active data transfer, thus eliminating associated delays.
Solution Approach 2:
The MTU parameter is adjusted to match the actual transmission path capabilities, eliminating the need for fragmentation. By changing MTU from a fixed small value to an adaptive larger value that fits the path MTU, the system avoids fragmentation overhead and reassembly delays while maintaining flexibility to adapt to different network conditions.
Data Source
AI summary
Various embodiments of a method and apparatus are disclosed. A higher MTU (Maximum Transmit Unit) between a network Core and the eNBs of the network are configured, as well as in wireless RAN segments. These MTU are dynamically adjusted to allow for the most efficient the packet-sizes according to the UE capabilities and Radio-conditions.