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18031results about How to "Avoid collision" patented technology

Emergency Vehicle Warning Device and System

An emergency vehicle warning device and a vehicle warning system method for notifying a person (and plural) in a moving vehicle (and plural), an approaching emergency vehicle (and plural), including a transmitter for transmitting an emergency signal from an emergency vehicle and a receiver embedded in a siren and light vehicle warning device located near or attached to a traffic signal, and the receiving vehicle warning devise emits lights and loud siren sounds, which alert driver(s) of moving vehicle(s) and pedestrian(s), that the emergency vehicle(s) are approaching a nearby intersection; and the Emergency vehicle warning system comprising a transmitting means located in an emergency vehicle for transmitting an emergency signal indicating that the emergency vehicle(s) are approaching the intersection that is activated or starts and continues signaling when emergency vehicle(s) are on the move nearby in emergency conditions, a receiving means located in a siren and light vehicle warning device, such device located near or attached to a traffic signaling device or light, such receiving means for receiving the emergency signal from the transmitting means, and an alert means triggered by the receiving means to alert the driver of the moving vehicle(s) that the emergency vehicle(s) are approaching.
Owner:APPLEBAUM CRAIG DAVID

Hybrid coordination function (HCF) access through tiered contention and overlapped wireless cell mitigation

A method and system reduce interference between overlapping first and second wireless LAN cells in a medium. Each cell includes a respective plurality of member stations and there is at least one overlapped station occupying both cells. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point transmits a beacon packet containing the inter-cell contention-free period value, which is intercepted at the overlapped station. The overlapped station forwards the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires. The beacon packet sent by the first access point station also includes an intra-cell contention-free period value, which causes the member stations in the first cell to delay accessing the medium until polled by the first access point. After the expiration of the intra-cell contention-free period, member stations in the first cell may contend for the medium based on the quality of service (QoS) data they are to transmit, using the Tiered Contention Multiple Access (TCMA) protocol.
Owner:AT&T INTPROP II L P
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