EMLSR Link Availability Signaling to Reduce Access Control Delay

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Solution Overview

Problem

In EMLSR communication, when a communication terminal cannot detect a Multi-STA RTS in any pre-configure link, it is difficult to specify a single radio link for subsequent operations, leading to access control delays and inefficient data transmission.

Innovation Solution

A wireless communication control device that includes a communication control unit to receive and transmit information indicating available links, allowing the specification of a suitable link for subsequent communication based on the received information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If EMLSR STA waits for control frame (Multi-STA RTS) in all pre-configure links, then it can detect available links for communication, but it experiences access control delays and cannot specify next single radio link when control frame is not detected

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidaccess control delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The access point performs preliminary actions by proactively notifying the EMLSR STA about available single radio links before the STA needs to wait for control frames. This is achieved through: (1) The AP determines available links in advance based on its own status and communication requirements, and (2) The AP includes this availability information in control frames sent to the STA, allowing the STA to prepare and switch to the appropriate link without waiting and reducing access control delays

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the AP continuously monitors link availability and communicates this information back to the EMLSR STA. The AP provides feedback about which links are available for single radio operation, enabling the STA to make informed decisions about link switching and maintain reliable communication without experiencing access control delays

Inventive Principle:

Principle #23Feedback

2Reliability

If EMLSR STA monitors all pre-configure links for control frames, then it can identify available links, but it increases information exchange overhead and communication complexity

Engineering Contradiction:

Improvelink selection accuracyVSAvoidinformation exchange overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The invention extracts the link availability determination function from the EMLSR STA and relocates it to the access point. Instead of the STA monitoring all links and determining availability itself, the AP performs this function centrally and communicates only the necessary availability information to the STA. This reduces the information exchange overhead at the STA while maintaining accurate link selection

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The access point serves multiple functions simultaneously: it acts as the central controller for link management, the source of availability information, and the coordinator for single radio link switching. By consolidating these functions in the AP, the system reduces overall communication overhead and simplifies the STA's operation while maintaining reliable link selection

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250274978A1Wireless communication control device and method, and program

Publication Date: 2025.08.28 SONY GROUP CORP

AI summary

A wireless communication control device performs control to receive first information from a wireless communication device via one link of a plurality of links preset with the wireless communication device, and to transmit second information indicating an available link of the plurality of links.