EMLSR Use Reservation for Reliable Wireless Data Transmission
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Solution Overview
Problem
In the IEEE802.11be standard, communication terminals compatible with Extended Multi-Link Single Radio (EMLSR) face difficulties in specifying a Single Radio link for data transmission when they cannot detect Multi-STA RTS frames, leading to access control delays and inefficient data transmission.
Innovation Solution
A wireless communication control device that includes a communication control unit to transmit and receive use reservation information via multiple links, ensuring a secure use opportunity for at least one link, allowing the device to specify an available Single Radio link for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EMLSR STA waits for Multi-STA RTS control frame in all Pre-Configure Links, then it can detect the control frame and return CTS response, but it causes access control delays and increases time loss when the control frame cannot be detected
Solution Approach 1:
The patent applies preliminary action by having the AP pre-notify EMLSR STAs about future transmission opportunities and designated links before actual data transmission begins. The AP sends notification frames in advance that include information about which link will be used for upcoming transmissions, allowing STAs to prepare and switch to the appropriate link proactively rather than waiting passively for RTS frames. This reduces access control delays by eliminating the need to monitor all Pre-Configure Links for control frames.
Solution Approach 2:
The patent uses notification frames as an intermediary mechanism between the AP and EMLSR STAs. Instead of direct RTS/CTS handshaking on each link, the AP sends intermediate notification frames that convey transmission schedule and link assignment information to STAs. This intermediary communication allows STAs to anticipate future transmissions and switch to the correct link in advance, reducing the time loss associated with detecting control frames on multiple links.
2Reliability
If EMLSR STA monitors all Pre-Configure Links for Multi-STA RTS frames, then it can identify available links for data transmission, but it increases device complexity and information processing requirements
Solution Approach 1:
The patent extracts the link selection decision-making function from the EMLSR STA and relocates it to the AP. Instead of requiring STAs to monitor all Pre-Configure Links and independently determine which link is available, the AP centrally manages link assignments and communicates decisions to STAs through notification frames. This extraction reduces device complexity at the STA side while maintaining reliable link selection through centralized control.
Solution Approach 2:
The patent implements a feedback mechanism where the AP sends notification frames to EMLSR STAs that include information about designated links for upcoming transmissions. STAs provide feedback by switching to the notified link and preparing for reception. This feedback loop allows the AP to maintain centralized control over link selection while ensuring STAs have the necessary information to participate efficiently, reducing the complexity of distributed link monitoring.
3Reliability
If use reservation information is transmitted via multiple links, then data transmission reliability is improved, but information exchange overhead increases
Solution Approach 1:
The patent makes notification frames multi-functional by having them serve multiple purposes simultaneously. These frames not only notify STAs about upcoming transmissions but also convey link assignment information, timing details, and other control parameters in a single communication. This multi-functionality reduces information exchange overhead compared to using separate frames for each type of control information, while still achieving reliable data transmission through comprehensive advance notification.
Data Source
AI summary
The present technology relates to a wireless communication control device, method, and program that make it possible to more reliably perform data transmission.The wireless communication control device performs control of receiving first information from a wireless communication device via one of a plurality of links set in advance with the wireless communication device and transmitting use reservation information indicating that a use opportunity for at least one of the plurality of links is to be secured in advance. The present technology can be applied to a wireless communication system.