SBP Session Resumption via Resume Frames

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Solution Overview

Problem

Current IEEE 802.11bf standards lack a defined method for resuming the Sensing by Proxy (SBP) procedure after an SBP session is disconnected, leading to failed communication between the SBP initiator and responder.

Innovation Solution

The SBP initiator and responder reestablish the SBP session by exchanging a second wireless frame for establishing the session, utilizing historical information such as association IDs and measurement setup IDs to facilitate resumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the SBP session is disconnected, then communication between SBP initiator and responder fails, but the patent provides no defined method for resuming the SBP procedure

Engineering Contradiction:
ImproveSBP procedure continuityVSAvoidsession resumption mechanism
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the SBP initiator and responder prepare and exchange resume frames before the session is fully disconnected. The initiator transmits a resume frame containing resume information (such as association ID and measurement setup ID) to the responder, enabling the session to be reestablished without requiring complete renegotiation of the entire SBP procedure. This preliminary preparation of resume data allows for reliable session resumption while avoiding the need for complex reauthentication and reconfiguration processes.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If the SBP session is reestablished using historical information, then session resumption is enabled, but the protocol complexity increases due to additional frame exchange requirements

Engineering Contradiction:
Improvesession resumption capabilityVSAvoidframe exchange protocol
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by selectively reestablishing only the critical session parameters (association ID and measurement setup ID) rather than renegotiating the entire SBP procedure. The resume frame contains only the necessary historical information locally relevant to session resumption, allowing the initiator and responder to reconstruct the session state without processing the complete original protocol sequence. This localized approach enables reliable resumption while minimizing the complexity of frame exchanges.

Inventive Principle:
Principle #3Local quality

3Productivity

If timers are reconfigured during session reestablishment, then continuous sensing operations can be maintained, but the time required for reconnection increases

Engineering Contradiction:
Improvesensing operation continuityVSAvoidreconnection time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the SBP initiator configure timers and prepare resume information in advance before disconnection occurs. The initiator sets up the resume frame with timing information and association identifiers beforehand, so when reconnection is needed, the timers can be directly restored to their previous values without requiring full renegotiation. This preliminary configuration of timing parameters enables continuous sensing operations to resume quickly, minimizing the time loss associated with reconnection.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS20240340349A1Wireless communication apparatus and wireless communication method
Publication Date: 2024.10.10 DENSO CORP
  • US20240340349A1 patent drawing
  • US20240340349A1 patent drawing
  • US20240340349A1 patent drawing

AI summary

An SBP initiator includes a controller and a communicator. The controller and the communicator are configured to establish an SBP session by exchanging, with an SBP responder, a first wireless frame for establishing the SBP session. In a case where the SBP session is disconnected, the controller and the communicator are configured to reestablish the SBP session by exchanging, with the SBP responder, a second wireless frame for establishing the SBP session.