Patent ID: 8644771

Claim:
A method of power management in a portable communication device, comprising: in response to a triggering event, negotiating, by a first portable communication device, a transmission power level for wireless communication in an unlicensed radio spectrum band with a second portable communication device, wherein the first portable communication device is mechanically coupled to the second portable communication device, and wherein the negotiating comprises: transmitting, by the first portable communication device, messages to the second portable communication device at a plurality of different power levels; receiving, by the first portable communication device, at least one acknowledgement message comprising information associated with one of the plurality of power levels, wherein the at least one acknowledgement message indicates that the one of the plurality of different power levels is a successful transmission power level; and increasing, by the first portable electronic device, the successful transmission power level of the plurality of different power levels; storing a value of the transmission power level in the first portable communication device; and transmitting wireless communication by the first portable communication device to the second portable communication device at a power level limited by the transmission power level.