Scalable Header Extension via Payload Insertion
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently extending packet headers to accommodate additional data without increasing frame duration or requiring additional time slots, especially when legacy devices need to maintain compatibility and minimize overhead.
Innovation Solution
A scalable header extension structure that inserts extension headers into the payload or padding bits of packets, using indicator bits to point to subsequent extension headers, allowing for flexible and efficient transmission of additional data without extending frame duration or requiring separate frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If extension headers are transmitted using separate frames or additional time slots, then header extension data can be transmitted, but frame duration increases and transmission overhead increases
Solution Approach 1:
The patent merges the extension header data with the existing packet structure by inserting it into the payload field or padding bits of the current frame, rather than transmitting it in a separate frame. This combining approach allows header extension information to be conveyed without increasing frame duration or requiring additional time slots, thus resolving the contradiction between transmitting extension data and maintaining frame timing efficiency.
Solution Approach 2:
The payload field and padding bits in the packet structure are designed to serve multiple functions: they can carry actual payload data, transmission padding, or extension header information depending on the communication needs. This multi-functionality allows the same transmission resources to accommodate header extensions without requiring dedicated separate resources, thereby avoiding increased frame duration while still transmitting extension data.
2Device complexity
If extension headers are inserted into payload or padding bits, then overhead is reduced and legacy compatibility is maintained, but the header extension capability is limited by available bits
Solution Approach 1:
The extension header is segmented into multiple parts or fields that can be distributed across different packet structures. By dividing the extension header into manageable segments that fit within available payload or padding bit spaces, the system can convey extensive header extension information through multiple packets without requiring large contiguous bit allocations, thus overcoming the limitation of available bits while maintaining low overhead.
Solution Approach 2:
The patent extends the header extension capability by utilizing the temporal dimension - multiple packets can collectively carry the full extension header information through their individual payload or padding bits. This transforms the limitation from a spatial constraint (bits per packet) to a temporal solution (across multiple packets), thereby increasing adaptability without proportionally increasing per-packet overhead.
3Ease of operation
If indicator bits are used to point to subsequent extension headers, then flexible transmission is enabled, but device complexity increases
Solution Approach 1:
The indicator bits are pre-configured with standardized values that directly encode common extension header locations or patterns. By establishing predetermined indicator bit configurations before transmission, the receiving device can quickly interpret extension header information using simple lookup or decoding logic, rather than performing complex real-time analysis, thus achieving flexible transmission with minimal processing complexity.
Data Source
AI summary
Systems and methods for extending header fields are disclosed. The header field may be extended without changing the current size of the header. Reserve bits may be used to indicate the use of an extended header and the extended header may be store in a variety of locations within the frame, including the frame payload or pad bits.