Motorola Solutions, Inc.

Other

George S Hanna

John B Preston

Alejandro G Blanco

Mark A Boerger

Peter J Bartels

Javier Alfaro

Liang Xu

Hugo Garcia

Systems and methods for determining available current for a battery in a portable electronic device. One method includes, in response to determining that a received current level of an auxiliary supply rail is equal to or below a predetermined threshold, acquiring a plurality of unloaded voltages for the battery and calculating an unloaded voltage based on the unloaded voltages. The method includes activating a switchable load coupled between the battery and ground, acquiring a plurality of loaded voltages for the battery, and calculating a loaded voltage based on the loaded voltages. The method includes calculating an impedance for the battery based on the unloaded and loaded voltages and an impedance for the switchable load. The method includes determining a current budget based on the impedance, a minimum operating voltage, and a maximum allowable current draw, and adjusting an operating parameter of the portable electronic device based on the current budget.

Determining available battery current in a portable electronic device

A method, apparatus, and system are provided for authentication of collaborative mobile devices. A first mobile device receives a challenge message, derives a first mobile device authentication result based on the challenge message, and conveys, to a second mobile device of a user of the first mobile device, a first short-range wireless signal comprising the challenge message. The second mobile device receives the challenge message from the first mobile device, derives a second mobile device authentication result based on the challenge message, and conveys, to the first mobile device, a first short-range wireless signal comprising the second mobile device authentication result. The first mobile device receives the second mobile device authentication result and authenticates one or more of the first mobile device, the second mobile device, and the user by conveying, to an authenticator device, the first mobile device authentication result and the second mobile device authentication result.

Method and apparatus for authentication of collaborative mobile devices

Authentication methods are used to authenticate, a device1 having an ESN1 (electronic serial number), a device2 having an ESN2, and/or a user of the devices. In one implementation, device1 receives the ESN2 in a near-field signal; derives an authentication result as a function of the ESN1 and ESN2; and sends the authentication result to an authenticator device to use in completing authentication. Authentication is confirmed when the device1 authentication result matches an authentication result independently generated by the authenticator device, which is provisioned with the ESN1 and ESN2. In a second implementation, device1 generates a RAND1 (random number) and sends the RAND1 to device2 over a near-filed link. An authenticator device confirms authentication upon receiving the same RAND1 from both device1 and device2.

Methods for authentication using near-field

Authentication methods are used to authenticate, a devicehaving an ESN(electronic serial number), a devicehaving an ESN, and/or a user of the devices. In one implementation, devicereceives the ESNin a near-field signal; derives an authentication result as a function of the ESNand ESN; and sends the authentication result to an authenticator device to use in completing authentication. Authentication is confirmed when the deviceauthentication result matches an authentication result independently generated by the authenticator device, which is provisioned with the ESNand ESN. In a second implementation, devicegenerates a RAND(random number) and sends the RANDto deviceover a near-filed link. An authenticator device confirms authentication upon receiving the same RANDfrom both deviceand device

Apparatus, which has a multilayer protocol stack for processing incoming messages, determines PTT state from messages received from a peripheral over a wireless serial communication channel. The apparatus: receives, from the peripheral, a sequence of messages comprising a plurality of data messages (e.g., RFCOMM messages), wherein each of the data messages provides an indication of a PTT state for the apparatus, and wherein the sequence of data messages is received over a short range wireless data path for exchanging priority data that comprises a wireless serial communication channel and that is different from a short range wireless data path for exchanging non-priority data. A pattern detector in the apparatus performs a pattern matching process, within the first two layers of the multilayer protocol stack, to determine the PTT state indicated by each of the data messages and sets the apparatus to have the determined PTT states.

Method and apparatus for communicating push-to-talk state to a communication device

Apparatus, which has a multilayer protocol stack for processing incoming messages, determines PTT state from messages received from a peripheral over a wireless serial communication channel. The apparatus: receives (), from the peripheral, a sequence of messages comprising a plurality of data messages (e.g., RFCOMM messages), wherein each of the data messages provides an indication of a PTT state for the apparatus, and wherein the sequence of data messages is received over a short range wireless data path for exchanging priority data that comprises a wireless serial communication channel and that is different from a short range wireless data path for exchanging non-priority data. A pattern detector in the apparatus performs () a pattern matching process, within the first two layers of the multilayer protocol stack, to determine the PTT state indicated by each of the data messages and sets () the apparatus to have the determined PTT states.

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Miami, FL, United States of America

George S Hanna