Motorola Corporation

Google Inc.

Motorola Mobility LLC

Google Technology Holdings LLC

William E Welnick

William Paul Alberth, Jr

Daniel J Declerck

David J Krause

Brian David Storm

Robert T Love

Murali Narasimha

Dean E Thorson

Naveen Aerrabotu

Michelle L Koenig

William P Alberth

Joey Chou

Murall Narasimha

Samuel J Liggett

A communication device performs a method for detecting presence of a jamming signal. The method includes retrieving a scan list comprising multiple radio channels within a first frequency range of operation of the communication device. The method further includes scanning at least a subset of the channels on the scan list to determine, for each scanned channel, whether energy that exceeds an energy threshold is detected on the scanned channel. Moreover, the method includes determining a first quantitative measure based on a first plurality scanned channels having energy that exceeds the energy threshold, and comparing the first quantitative measure to at least a first jamming signal detection threshold. Additionally, the method includes indicating, on the communication device, presence of a jamming signal when the first quantitative measure satisfies the at least a first jamming signal detection threshold.

Methods and apparatus for detecting presence of a jamming signal

An apparatus () generates a preferred roaming list () for a wireless mobile station () that includes area identification data (such as GEO GROUP_ID) () corresponding to an area serviced by at least one wireless wide area network, such as a ground based CDMA system and an area services by at least one in-vehicle wireless pico-cell (), such as a wireless CDMA pico-cell located on an aircraft or any other suitable vehicle. The area identification data () is associated with a wireless in-vehicle pico-cell system identification data () and in the case of a CDMA pico cell system, a system identification data SID) and network identification (NID) data pair () associated with the in-vehicle wireless pico-cell ().

In-vehicle pico-cell system and method therefor

In-vehicle pico-cell system and methods therefor

A method and system for selecting a communication network by a wireless communication device () includes receiving () an identification parameter at the wireless communication device from a communication network which identifies the communication network. Next, the method compares () the identification parameter with a list at the wireless communication device to determine () service information. The service information identifies the services supported by the communication network. The method further includes comparing () the service information with a service-related datum at the wireless communication device that indicates the services desired by the wireless communication device. Lastly, the method includes selecting () the communication network for accessing a requested service if the service information matches the service-related datum.

Method and system for selecting a communication network

A method and apparatus for performing the method are provided. The method includes operating a mobile device in a first network while a timer of the mobile device is running to prevent the mobile device from scanning for a second network. The method also includes determining a distance that the mobile device is from a reference location, where the reference location is associated with where the mobile device is prevented from scanning for the second network. The method further includes adjusting the timer when the determined distance from the reference signal exceeds a threshold. When the determined distance exceeds the determined distance, the mobile device can scan for the second network.

Method and apparatus for scanning for a wireless communication network

A method in a wireless communications device for allocating neighbor signals to a candidate set based on signal allocation criteria includes dynamically changing the signal allocation criteria based on at least one of a number of signals in an active signal set and on a signal quality of a strongest of signal in the active signal set. In one embodiment the signal allocation criteria is the length of an IIR filter.

Accelerated allocation of neighbor signals to candidates in cellular communications devices

A method () and mobile device () for reduced scanning within a uniform period in an out-of-service condition is described herein. In one arrangement, the method can include the steps of detecting () the out-of-service condition, during a wake-up interval (), waking () up to scan one or more channels () for service and maintaining a constant wake-up time for subsequent wake-up intervals. The method can also include the step of varying () the amount of time spent scanning the channels during the subsequent wake-up intervals. As an example, varying the amount of time spent scanning channels can be done by decreasing () the amount of time spent scanning for each successive, subsequent wake-up interval.

Reduced scanning within a uniform period in out-of-service conditions

A circuit () to acquire a more-preferred stored SID element () includes memory () and logic circuitry (). The memory () stores a roaming list (), such as a PRL, that includes a plurality of SID elements ranked according to an order of preference including at least one more-preferred stored SID element () and at least one less-preferred stored SID element (). The logic circuitry () is coupled to the memory () and performs a first more-preferred SID acquisition sequence () and then second more-preferred SID acquisition sequence (). The second more-preferred SID acquisition sequence () includes repeatedly attempting acquisition of the at least one more-preferred stored SID element () during the second more-preferred SID acquisition sequence () while also attempting to acquire the at least one less-preferred SID element () if desired.

Circuit and method for acquiring a more-preferred system identification (SID) element

A method within a communication device () for preventing reporting of duplicate pilots within a communication system () is disclosed. The method includes communicating with one or more base stations (); monitoring and maintaining a pilot set (); allocating one or more pilots not found in the active set (), the candidate set (), or the neighbor set () to a remaining set () comprising one or more remaining set pilots; providing a remaining set window () around each remaining set pilot; and eliminating a remaining set pilot when the remaining set window () around the remaining set pilot overlaps any of the active, the candidate, or the neighbor set pilots.

Method for preventing reporting of duplicate pilots within a communication system

A portable communication device () is provided with first transceiver circuitry () for sending and receiving signals on a first communication path and second transceiver circuitry () for sending and receiving signals on a second communication path. The portable communication device () also includes a controller () coupled to the first transceiver circuitry () and the second transceiver circuitry () for providing a deregistration message to the second transceiver circuitry () for transmission therefrom in response to determining that the portable communication device () is within signal coverage of the first communication path, activating the first transceiver circuitry () to send and receive signals on the first communication path, deactivating the second transceiver circuitry (), and thereafter activating the second transceiver circuitry () at times separated by a predetermined time interval to monitor at least one housekeeping channel of the second communication path.

Deep sleep mode for portable communication device

A method for controlling diversity receivers in a wireless communication device includes the steps of: determining if the wireless communication device is experiencing poor coverage (), using a first receiver and a second receiver for diversity () if the wireless communication device is experiencing poor coverage, and using the second receiver for scanning () if the wireless communication device is not experiencing poor coverage. Thus, diversity can be used when needed to improve reception. Both receivers, however, can be used in a non-diversity mode to reduce current drain or to speed up channel acquisition when coverage is not poor.

Method for controlling diversity receivers in a wireless communication device

A method and system for maintaining registration information for multiple communication areas within a network is provided. For a particular mobile subscriber, information associated with at least some prior registrations are retained, and in some instances are re-used upon re-entry into a communication area in which the mobile subscriber was previously located. The retention of registration information for multiple communication areas is managed as the default, without requiring additional signaling associated with each registration.

Method and system for maintaining registration information for multiple communication areas

A circuit () and method employing logic circuitry () and memory () identifies a reverse link limited channel (). The logic circuitry () identifies a reverse link limited channel based on determining that an access probe failure occurred on a channel (). The logic circuitry () causes the memory to store reverse link limited channel data () in response to the logic circuitry () determining that the access probe failure occurred. The reverse link limited channel data (), for example, may be a channel identification associated with the channel (), a base station identification associated with the channel (), a location identification of the circuit () or any data suitable for identifying and adapting dynamically to the reverse link limited channel.

Circuit and method for adapting to reverse link limited channels

A method () in a CDMA terminal device for acquiring a system identified in an enhanced preferred roaming list (enhanced PRL), with at least one entry containing a mobile country code, includes the steps of obtaining () system identifiers from SYNCH channels on a scan list, determining () if the system identifiers match entries on the enhanced PRL, and inserting () channel information items on a first list if the system identifiers do not match entries on the enhanced PRL. If all channels on the scan list have been scanned without any system identifiers matching entries on the enhanced PRL, the method obtains () mobile country codes using channel information items from the first list, determines () if the mobile country codes match entries on the enhanced PRL, and camps () on a system if its mobile country code matches an entry on the enhanced PRL.

Using an enhanced preferred roaming list in a terminal device

Methods in communications devices and networks for reducing an infrastructure registration race condition. In one embodiment, a communications device transmits () a first network connection request is a first network, and after waiting a specified time interval, the communication device transmits () another network connection request to the first network. The communications device may determine the time interval, or it may be received () from the network. Alternatively, a time stamp or some other indicium is applied to the connection requests transmitted by the communications device so that a home location register or other entity may determine the order in which the requests were transmitted.

Growing community of inventors

Poway, CA, United States of America

William E Welnick