Optimized MAC Frame Header Reducing Wireless Network Overhead
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Solution Overview
Problem
In wireless local area networks, especially in scenarios like sensor networks and smart grids, the overhead of frame headers is high due to the inclusion of all frame header information in MAC frames, which is inefficient for short data packets and networks with low traffic, leading to increased transmission overhead.
Innovation Solution
Implementing an optimized MAC frame header format that reserves only necessary frame header information, indicated by specific bits or fields, allowing for reduced overhead by eliminating unnecessary information and using unique address identification fields to indicate MAC addresses and reservation durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional MAC frame header containing all frame header information is used, then complete frame information is transmitted, but frame overhead increases significantly
Solution Approach 1:
The patent extracts only the necessary frame header information (source address, destination address, and duration/ID) from the complete traditional MAC frame header. This selective extraction reduces frame overhead while maintaining the essential information needed for frame transmission and channel reservation, directly resolving the contradiction between transmission completeness and overhead reduction.
Solution Approach 2:
The patent applies local quality by making the MAC frame header format adaptable - using a compressed format for simple transmissions and a complete format when needed. The type/subtype field enables stations to distinguish between compressed and traditional formats, allowing the system to optimize frame header size based on specific transmission requirements rather than always using the full header.
2Loss of energy
If an optimized MAC frame header with compressed format is used, then frame overhead is reduced, but frame transmission correctness may be compromised
Solution Approach 1:
The patent introduces a type/subtype field as an intermediary that mediates between the compressed and traditional MAC frame header formats. This field acts as a marker that enables receiving stations to correctly interpret the compressed format fields (such as distinguishing duration from AID values), thereby ensuring transmission correctness while allowing overhead reduction.
Solution Approach 2:
The patent changes the interpretation of certain fields based on the type/subtype indicator. For example, the duration/ID field can represent different values depending on the frame type, and the type/subtype field itself changes to indicate whether a compressed or traditional format is being used. This parameter change mechanism ensures that compressed formats are correctly interpreted without losing transmission reliability.
3Reliability
If all frame header information is included in MAC frames, then channel reservation and sequence control are maintained, but efficiency for short data packets decreases
Solution Approach 1:
The patent extracts only the essential channel reservation information (duration field) and identity information (source/destination addresses) from the complete MAC frame header. By removing redundant fields such as sequence control and QoS control that are not needed for simple short packet transmissions, the patent maintains channel reservation functionality while significantly improving transmission efficiency for short data packets.
Solution Approach 2:
The patent applies partial action by including only the necessary portion of frame header information for simple transmissions. Instead of including all fields from the traditional MAC frame header, the compressed format includes only what is essential for channel reservation and basic frame identification, thereby improving efficiency while maintaining the critical functions needed for short packet communications.
Data Source
AI summary
Provided are methods and devices for transmitting a frame in a network. The method includes: setting, by a sending station, a media access control (MAC) frame header of a MAC frame, wherein the MAC frame header includes at least one bit for indicating whether the MAC frame header adopts an optimized MAC header format, the optimized MAC frame header format referring to a MAC frame format in which only necessary frame header information is reserved (S302); sending, by the sending station, the MAC frame to a receiving station (S304). The present disclosure not only ensures correct sending and receiving of a frame, but also effectively reduces the overhead of the frame header.