Wireless Bandwidth Negotiation via Channel Puncture Indication
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Solution Overview
Problem
Current wireless network technologies face challenges in efficiently managing bandwidth negotiation and channel puncture schemes across different bandwidths and network versions, particularly in supporting high-bandwidth operations like 320 MHz in IEEE 802.11 networks, which affects the stability and efficiency of frame exchanges in TXOPs.
Innovation Solution
The method involves a wireless device announcing a channel puncture scheme, transmitting frames to negotiate bandwidth, and exchanging frames using the negotiated bandwidth, with specific bit configurations in the service field and duration field to indicate channel puncture patterns, supporting both static and dynamic bandwidth negotiations and punctures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel puncture schemes are implemented to support high-bandwidth operations (320 MHz), then bandwidth utilization and network performance are improved, but system complexity and difficulty in managing compatibility across different network versions increase
Solution Approach 1:
The patent uses parameter changes by modifying bit fields in existing frame structures (service field, duration field, U-SIG) to indicate channel puncture schemes. Different bit patterns represent different puncture configurations, allowing the system to adapt to various bandwidth scenarios without changing the fundamental frame structure, thus managing complexity while supporting high bandwidth operations
Solution Approach 2:
The patent makes existing frame fields multi-functional by using reserved bits and existing field combinations to convey channel puncture information. The service field, duration field, and U-SIG are used not only for their original purposes but also to indicate puncture schemes, enabling a single unified mechanism to handle multiple bandwidth scenarios across different network versions
2Adaptability or versatility
If dynamic bandwidth negotiation is implemented, then adaptability to different network conditions is improved, but stability and reliability of frame exchanges deteriorate due to increased negotiation overhead and potential errors
Solution Approach 1:
The patent applies preliminary action by announcing the channel puncture scheme in advance through management frames before actual data transmission. This allows receiving devices to pre-configure their processing according to the announced puncture pattern, ensuring stable and reliable frame exchanges without requiring complex real-time negotiation during data transmission
Solution Approach 2:
The patent segments the bandwidth negotiation process into distinct phases: announcement phase (where the puncture scheme is declared in management frames) and execution phase (where devices follow the announced scheme). This segmentation separates the negotiation overhead from data transmission, improving reliability by making the negotiation explicit and predetermined rather than implicit and dynamic
3Adaptability or versatility
If existing frame structures are modified to include channel puncture indications, then backward compatibility is improved, but manufacturing precision and difficulty in implementing consistent parsing across devices increase
Solution Approach 1:
The patent applies local quality by making modifications to specific localized portions of frame structures (using reserved bits in service field, specific bit patterns in duration field, or dedicated fields in U-SIG) rather than changing the overall frame structure. This allows devices to parse only the relevant localized fields for puncture information while ignoring other fields, reducing implementation complexity and improving consistency
Solution Approach 2:
The patent uses intermediary elements (reserved bits and existing field combinations) as mediators to convey channel puncture information. These intermediary fields act as a bridge between legacy frame structures and new puncture functionality, allowing backward compatibility while enabling precise indication of puncture schemes through standardized bit patterns that reduce parsing ambiguity
4Measurement precision
If multiple bit configurations are used to indicate different puncture schemes, then measurement precision and accuracy of channel indication are improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies partial action by using only a subset of available bit patterns to indicate puncture schemes. Not all possible bit combinations are used; instead, specific predefined patterns represent specific puncture configurations. This reduces processing overhead compared to handling all possible combinations while maintaining sufficient precision to accurately indicate the required puncture scheme
Data Source
AI summary
Various embodiments relate to a method performed by a first wireless device for bandwidth negotiation for frame exchange in a TXOP with a second wireless device, including: announcing by the first wireless device a channel puncture scheme indicating whether some 20 MHz channels covering a BSS operating bandwidth are punctured or not; transmitting a frame to the second wireless device indicating a bandwidth for the frame exchange; receiving a frame from the second wireless device indicating a negotiated bandwidth for the frame exchange; and exchanging frames with the second wireless device using the negotiated bandwidth.