Packet Capsulation Device Selective Tunneling for Wireless Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When a wired communication network is changed, rewiring is often necessary, and using a wireless LAN can reduce this effort, but it may not support all terminals, leading to reduced throughput and packet loss due to encapsulation methods for tunneling wireless communication channels.
Innovation Solution
A packet encapsulation method that adds a header to initial packets from terminals to identify packet paths and transmits them without encapsulating subsequent packets, using Generic Routing Encapsulation (GRE) and OpenFlow technology to manage packet forwarding and restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If packet capsulation is performed for all packets to tunnel the wireless communication channel, then unsupported terminals can communicate through the wireless channel, but the packet size increases and throughput decreases
Solution Approach 1:
The patent applies partial action by performing capsulation only on initial packets that require tunneling through the wireless channel, while subsequent packets in the same communication flow are transmitted without capsulation. This selective approach maintains compatibility for unsupported terminals while avoiding the throughput penalty of capsulating every packet.
Solution Approach 2:
The patent segments the packet transmission process into two distinct phases: initial packet transmission with full capsulation to establish the tunnel, and subsequent packet transmission without capsulation to maintain efficiency. This segmentation allows the system to achieve both compatibility and performance.
2Reliability
If packet capsulation is performed for large packets, then tunneling can be achieved, but packet fragmentation becomes more likely and performance deteriorates
Solution Approach 1:
The patent applies partial action by limiting capsulation to only the initial packets needed to establish the tunnel, while allowing large subsequent packets to pass through without capsulation. This avoids the fragmentation problem that would occur if all large packets were capsulated, while still achieving reliable tunneling for the initial connection.
3Adaptability or versatility
If multiple routers are involved in MAC address conversion, then wireless communication can be enabled, but the source MAC address may not be transmitted correctly to the destination terminal
Solution Approach 1:
The patent uses an intermediary approach by introducing a capsulation mechanism that preserves the original source MAC address within the capsulated packet structure. This intermediary layer allows multiple routers to perform their MAC address conversions while the original MAC address information remains intact inside the capsulated payload, preventing information loss.
Data Source
AI summary
The packet capsulation device 10 includes capsulation means 11 for encapsulating an initial packet in communication between a first terminal and a second terminal serving as a partner terminal by adding a header for capsulation, and for non-encapsulating on reception of an encapsulated packet, storage means 12 for storing data capable of identifying a path of a packet following the initial packet in the wireless communication channel, and non-encapsulated packet transmission means 13 for transmitting the packet following the initial packet to the wireless communication channel without encapsulating, according to the data capable of identifying the path of the packet.