Patent ID: 7787410

Claim:
A method, comprising: transmitting on behalf of a first device of a wireless network a first signal using a first transmission power (TP 1 ) to indicate to other devices of the wireless network receiving the first signal to cease communication at least in part until the first device has finished communicating with a second device of the wireless network; transmitting on behalf of the first device to communicate with the second device, at least a second signal using a second transmission power (TP 2 ), the second transmission power being greater than the first transmission power; and wherein the first transmission power (TP 1 ) is defined by TP 1 = TP 2 ⁡ ( 1 + Δ ) α wherein , ⁢ Δ = ( σ 2 m 2 ⁢ β ⁢ ⁢ N u ⁢ R ) 1 α - 1 < 0 ; σ 2 = ∫ - ∞ ∞ ⁢ [ ∫ - ∞ ∞ ⁢ w ⁡ ( t - τ ) · ( w ⁡ ( t ) - w ⁡ ( t - δ ) ) ⁢ ⅆ t ] 2 ⁢ ⅆ τ ; m = ∫ - ∞ ∞ ⁢ w ⁡ ( t - δ ) · ( w ⁡ ( t ) - w ⁡ ( t - δ ) ) ⁢ ⅆ t ; w(t) is waveform function for each ultra wide band impulse, and δ is the phase shift; β is threshold for SINR above which a packet can be successfully received; N u is number of neighboring nodes that are also transmitting; R=1/(N s T f ) is data transmission rate; N s is number of impulses per bit; T f is impulse repetition interval; and α is the path loss exponent due to wireless radio transmission.