Emergency Message Transmission via Pre-RTS Channel Reservation
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Solution Overview
Problem
Existing wireless networks experience delays in transmitting emergency messages, which can be critical in situations like imminent collisions, as nodes must follow strict timing protocols that lead to backoff delays, potentially causing life-threatening delays in communication.
Innovation Solution
Implementing a local area network (LAN) system where nodes can detect emergency events and transmit messages with reduced or zero interframe spaces, preempting other transmissions by waiting a brief listening interval, such as less than one SIFS, to ensure rapid emergency message delivery to the base station, which can then relay it to a Public Safety Answering Point (PSAP) without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nodes follow standard wireless transmission protocols with strict timing requirements, then transmission reliability is maintained, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by implementing a pre-RTS (Request to Send) packet mechanism that prepares the transmission channel in advance. Before the standard RTS packet is sent, a shorter pre-RTS packet is transmitted to reserve the channel and notify other nodes of the upcoming emergency transmission. This preliminary reservation reduces the backoff delay that would normally occur during channel access contention, allowing the emergency message to be transmitted more quickly while still maintaining protocol-based reliability through the subsequent standard RTS/CTS handshake.
2Object-affected harmful factors
If nodes wait for standard interframe spaces (SIFS, PIFS, DIFS) between transmissions, then collision avoidance is achieved, but transmission speed decreases
Solution Approach 1:
The patent applies the skipping principle by allowing emergency message transmissions to bypass the standard interframe space waiting periods (SIFS, PIFS, DIFS). Once the channel is reserved through the pre-RTS mechanism, the emergency node transmits its message immediately without waiting for the full DIFS interval that normal transmissions require. This rushing through of the standard timing protocols enables faster transmission speed for emergency messages while the pre-RTS mechanism ensures collision avoidance by having other nodes defer their transmissions during the reserved period.
Data Source
AI summary
Disclosed herein are systems and methods for improved, rapid wireless emergency communication in both advanced (5G/6G) and low-complexity (CDMA-CA) networks. Embodiments may provide improved means for preempting other non-emergency communication, delivering an emergency message with sufficient information to enable first-responders to take appropriate action even if no further communication is possible, and for establishing a privileged voice connection following the emergency message. Embodiments may include a hailing-type emergency message configured to alert a base station when the addresses of base station is unknown to the emergency node. With improved speed and reliability of emergency communication, first-responders may begin an appropriate life-saving response without delay and with knowledge of the type and location of the emergency.