Patent ID: 8665155

Claim:
An emergency rescue system, modularly implemented as a transmitter, a receiver-transmitter, and a processor, comprising 1) at least one dynamic node, as a transmitter inapplicable to receiving nor processing signals, portably implemented for broadcasting only one mayday signal of a fixed signal intensity, 2) no more than one set of m fixed nodes dispensing with a threshold for signal intensity, as receiver-transmitters inapplicable to processing signals, each with an individual fixed node identification, physically scattered in lines parallel to each other, with said at least one dynamic node interspersed in between said lines, wherein upon sensing said mayday signal, n out of m fixed nodes, 1≦n≦m, denoted respectively as a 1 st fixed node, a 2 nd fixed node, . . . to an n th fixed node, send said signal intensity along with said individual fixed node identification to a back-end processing platform, and 3) said back-end processing platform, separately located away from said fixed nodes: 3.I) for each said n th fixed node: obtaining a value of R from the following calculation, R =(( Pt·Gt·Ae·Gr )/(4 π·Pr ) 1/2 ( derived ⁢ ⁢ from ⁢ ⁢ P r = P t ⁢ G t 4 ⁢ π ⁢ ⁢ R 2 × A e × G r ) P r is an received return energy, P t is an irradiation energy, G t is a gain of irradiation, A e is an efficient area of a receiving antenna of the fixed node, G r is sum of a loss of a receiver of the fixed node, a gain of signal processing, and a loss of system; 3.II) for said value of R obtained from step I) for said n th fixed node: generating a ring R n of multiple candidate locations with a diameter of R to a center of said n th fixed node, such that a ring R 1 is generated for said 1 st fixed node, a ring R 2 is generated for said 2 nd fixed node, etc; and 3.III) locating number of rescue locations relative to the dynamic node by intersecting ring R 1 to ring R n , wherein said number of rescue locations decreases with an increase of n.