Extended Control Frame Format for WLAN Subtype Capacity
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Solution Overview
Problem
Current wireless local area network (WLAN) standards, such as IEEE 802.11, are limited in the number of subtypes they can support for control frames, which restricts the flexibility and capacity of wireless communication systems.
Innovation Solution
The introduction of an extended control frame format that includes an additional subtype field outside the MAC header or a reconfigured field within the MAC header, allowing for more than sixteen subtypes of control frames, enabling support for additional subtypes and enhanced communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the standard control frame format with a fixed subtype field is used, then the structure remains simple and compatible with legacy devices, but the number of supported subtypes is limited to sixteen
Solution Approach 1:
The subtype identification function is segmented into two parts: the original 4-bit subtype field in the MAC header and a new extended subtype field. This segmentation allows the system to support more than sixteen subtypes by combining information from both fields, resolving the contradiction between maintaining simple legacy compatibility and enabling extended subtype support.
Solution Approach 2:
The patent adds another dimension to the subtype identification by introducing an extended subtype field beyond the original fixed subtype field. This dimensional expansion allows the system to represent more subtype values while maintaining the original frame structure for backward compatibility, effectively increasing the subtype capacity from 16 to potentially hundreds or thousands of subtypes.
2Adaptability or versatility
If the subtype field is extended to support more subtypes, then the versatility of control frames improves, but the compatibility with legacy devices that expect the original format deteriorates
Solution Approach 1:
The extended subtype information is extracted from the original subtype field constraints and placed into a separate extended subtype field. This extraction allows legacy devices to ignore the extended portion and process only the original subtype field, while new devices can utilize both fields to access the full extended subtype capacity, thus maintaining backward compatibility while enabling extended functionality.
Solution Approach 2:
The frame structure is designed with multi-functionality to serve both legacy and extended requirements. The original subtype field continues to function for legacy device compatibility, while the added extended subtype field provides additional capacity for newer devices. This universal design allows the same frame format to serve multiple purposes and device generations simultaneously.
3Productivity
If a fixed subtype field size is maintained, then processing remains efficient and simple, but the system cannot support additional control frame subtypes beyond sixteen
Solution Approach 1:
The subtype field configuration is made dynamic through the introduction of an extension indicator that signals whether the extended subtype field is present. This dynamic approach allows the system to adapt the frame structure based on the communication needs, maintaining efficient fixed-size processing when extension is not required while enabling extended subtype support when needed, thus balancing processing efficiency with subtype versatility.
Data Source
AI summary
Aspects of the disclosure provide an apparatus having a processing circuit and a transceiver. The processing circuit is configured to generate a frame to have an extended subtype under a control type, configure a media access control (MAC) header of the frame to indicate an extended control frame format, and configure a field of the frame to be an extended subtype field according to the extended control frame format to carry an identification for the extended subtype. The extended subtype is defined in addition to a plurality of subtypes that are identifiable using a subtype field in the frame according to a control frame format. The transceiver is configured to transmit signals to carry the frame.