Initial Control Frame Exchange for Non-TB PPDU Solicitation
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Solution Overview
Problem
Existing wireless communication technologies, particularly in IEEE 802.11 standards, lack efficient mechanisms for exchanging initial and dynamic control information, which hampers features like enhanced power saving and in-device coexistence, and does not adequately support high-density network environments.
Innovation Solution
Introduce innovative frame formats, such as the Initial Control Frame (ICF) and Initial Control Response (ICR) frames, that allow for the solicitation and exchange of non-Trigger-Based physical layer protocol data units (non-TB PPDUs), enabling dynamic control information exchange and supporting features like dynamic power save and in-device coexistence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Trigger frame format is used to solicit TB PPDUs, then network throughput is enhanced, but the mechanism lacks efficiency for exchanging initial control information for power saving and coexistence features
Solution Approach 1:
The patent segments the control information exchange process into two distinct phases: a setup phase using Trigger frames for TB PPDU allocation, and a data exchange phase using non-TB PPDU with initial control frame formats for power saving and coexistence information. This segmentation allows each phase to be optimized for its specific function, resolving the contradiction between throughput enhancement and control information exchange efficiency.
Solution Approach 2:
The patent introduces dynamic initial control frame formats that can adaptively exchange control information for power saving, coexistence, and other network management features. The frames dynamically adjust their content based on the specific communication needs, enabling efficient control information exchange while maintaining the high throughput capabilities of TB PPDU when needed.
2Reliability
If existing 802.11 frame formats are used, then backward compatibility is maintained, but they do not adequately support high-density network environments and advanced features
Solution Approach 1:
The patent extends existing 802.11 frame formats to serve multiple functions: they can carry both traditional TB PPDU control information and new initial control information for power saving, coexistence, and high-density network management. This multi-functionality maintains backward compatibility while enabling support for advanced networking features in high-density environments.
Solution Approach 2:
The patent modifies frame parameters such as adding new fields and changing the structure of existing fields in the initial control frame format. These parameter changes enable the frames to carry additional control information for power saving and coexistence features while maintaining compatibility with existing 802.11 receivers that ignore unknown fields.
3Adaptability or versatility
If non-TB PPDU is used for control information exchange, then power saving and coexistence features are enabled, but the exchange process becomes more complex
Solution Approach 1:
The patent uses preliminary Trigger frames to establish TB PPDU allocation and basic communication parameters before transitioning to non-TB PPDU for detailed control information exchange. This preliminary action simplifies the overall process by handling the complex setup separately, reducing the complexity burden on the non-TB PPDU exchange for power saving and coexistence features.
Data Source
AI summary
Methods and apparatus are described for exchanging an Initial Control Frame (ICF) and an Initial Control Response frame (ICR) between devices of a wireless network. A first wireless device generates an ICF that includes an indication configured to solicit a responsive non-High Throughput duplicate physical layer protocol data unit (non-HT duplicate PPDU) from a second wireless device. The first wireless device subsequently transmits the ICF, during a transmit opportunity (TXOP), for receipt by the second wireless devices. In various embodiments, the first wireless device further receives an ICR in the responsive non-HT duplicate PPDU.