Abstract: Certain embodiments allow security keys to be maintained across mobile device states, or communication events, such as hand-over, and system idle and sleep power savings modes. By monitoring the lifetime of security keys, keys may be refreshed in an effort to ensure key lifetimes will not expire during a hand-over process or other device unavailable state.

Abstract: A base station may be configured so that it operates in accordance with certain MAP transmission rules that may enable mobile stations to save battery power in certain situations. Upon receiving a MAP message, a mobile station may determine whether there is a burst allocated for the mobile station in the current frame by determining the value of at least one of the following: an idle users bit in the SUB-MAP pointer information element (IE), and a sleep users bit in the SUB-MAP pointer IE. The mobile station may discontinue processing of the MAP message and power down one or more components of the mobile station if there is not a burst allocated for the mobile station in the current frame.

Abstract: Certain embodiments provide techniques for background scanning in a wireless communication device receiving signals from multiple base stations using a background scanning processor separate from a receive processor. The techniques generally include buffering raw signal data from multiple base stations, forwarding the raw signal data to a receive baseband processor for decoding data from a first one of the base stations that is currently designated as a serving base station with an active connection to the wireless communications device, forwarding the raw signal data to a background scanning processor, separate from the receive baseband processor, and generating channel characteristics corresponding to the multiple base stations with the background scanning processor without interrupting the exchange of data with the first base station designated as the serving base station.

Abstract: Methods and apparatus are provided for operating in a first RAN at a working frequency, determining a priority of measurement tasks enabled by the first RAN, and dynamically scheduling the tasks according to the priority. For certain aspects, the first RAN may be a TD-SCDMA network. The measurement tasks are intended to measure at least one parameter of a serving cell in the first RAN on a primary frequency, at least one cell in the first RAN on at least one frequency other than the primary frequency, one or more cells in at least one RAN other than the first RAN (e.g., a GSM network) or any combination thereof. This dynamic assignment allows the UE to make scheduling decisions on which frequencies and RANs to measure, as well as how often these frequencies and RANs are measured, thereby providing for more efficient use of idle slots over conventional haphazard scheduling.

Abstract: Techniques for efficient transmission of messages in a ranging procedure between a mobile station (MS) and a base station (BS) are provided. The techniques may allow efficient bandwidth allocation for the ranging procedure.

Abstract: Embodiments of the present invention relate to a data processing method comprising the steps of processing a first sample set associated with first results of tracking a target in a number of image frames using a first object classifier arranged to operate according to a first feature and processing a second sample set associated with second results of tracking the target in said number of image frames using a second object classifier arrange to operate according to a second feature, and using at least one of the first and second tracking results to influence at least one particle filter adapted to influence at least one of subsequent first and second tracking results.

Abstract: In certain wireless communications systems, such as TD-SCDMA, frames are divided into sections allocated for various communication purposes such as uplink and downlink transmissions. In such schemes, there may be no mechanism to generate gaps for a UE to employ for non-allocated purposes, such as inter-frequency or inter-RAT measurement. To generate gaps for such purposes the UE may employ rate-matching techniques to take certain allocated time slots for the UE and reserve them for inter-RAT measurement or other purposes. The rate-matching techniques generate unconfigured slots.

Abstract: Methods and apparatus for re-acquiring a WiMAX network after a relatively long power saving mode (e.g., sleep or idle mode) using a “pre-wakeup” scheme are provided. According to this pre-wakeup scheme, a mobile station (MS) may power up receiving circuitry to search for the current channel or, if unsuccessful, a neighbor channel. After a successful network search during sleep mode, the MS may return to sleep for the remainder of the sleep window until the circuitry is powered up a second time to wakeup and then listen for an expected message. By pre-waking up and searching before waking up for the expected message, the MS may counteract the effects of the potential error in the local oscillator frequency accumulated during the long sleep mode. In this manner, the message miss rate may be reduced, thereby saving power and extending the time in which the MS may operate between battery rechargings.

Abstract: Certain aspects of the present disclosure relate to a technique for effective measurement in a second Radio Access Technology (e.g., TD-SCDMA) while receiving service in a first Radio Access Technology (e.g., GSM).

Abstract: Methods and apparatus for ranging with one or more neighboring sectors during normal operation of a mobile station (MS) with its serving sector are provided. The ranging results may be frequently updated in an effort to accelerate the handover process to another base station (BS) providing coverage for one of the neighboring sectors.

Abstract: Techniques for efficient transmission of messages in a ranging procedure between a mobile station (MS) and a base station (BS) are provided. The techniques may allow efficient bandwidth allocation for the ranging procedure.

Abstract: Certain embodiments of the present disclosure present methods and apparatuses that enable a mobile station (MS) to selectively reject downlink (DL) data during idle mode. The MS may determine whether to reject the pending DL data based on information about the data. This information may be provided by a base station (BS) that is part of the access service network (ASN) that is retaining the DL data. The information provided by the BS may, for instance, include service flow information related to the pending DL data. In certain embodiments, the information may include one or more internet protocol (IP) packets that are part of the pending DL data.

Abstract: Certain embodiments of the present disclosure provide techniques for re-directing a mobile station to perform network re-entry through a neighbor base station. A current serving BS may re-direct the MS to a neighbor BS with a message containing configuration information allowing the MS to communicate with the target BS without a lengthy scan procedure.

Abstract: Certain embodiments of the present disclosure provide a technique that allows a mobile station (MS) to proactively perform a handover during an idle mode. For example, during listening intervals of an idle mode, the MS may scan neighboring base stations (BSs) and proactively handover to a target BS. The MS may be able to synchronize frame numbers with the target BS before missing a page.

Abstract: Certain embodiments of the present disclosure allow a mobile station (MS) to proactively request neighbor base station information from a serving base station, for example, if a mobile neighbor advertisement (MOB_NBR-ADV) message is not received (or expected) in a predetermined time period.

Abstract: Methods and apparatus for re-acquiring a WiMAX network after a relatively long power saving mode (e.g., sleep or idle mode) using a “pre-wakeup” scheme are provided. According to this pre-wakeup scheme, a mobile station (MS) may power up receiving circuitry to search for the current channel or, if unsuccessful, a neighbor channel. After a successful network search during sleep mode, the MS may return to sleep for the remainder of the sleep window until the circuitry is powered up a second time to wakeup and then listen for an expected message. By pre-waking up and searching before waking up for the expected message, the MS may counteract the effects of the potential error in the local oscillator frequency accumulated during the long sleep mode. In this manner, the message miss rate may be reduced, thereby saving power and extending the time in which the MS may operate between battery rechargings.

Abstract: A method for frame number synchronization in a wireless communication network may be implemented by a base station. The method may include determining a current time from a timing source that is common to multiple other base stations. The method may also include determining a time offset between the current time and a reference time, wherein the base station and the multiple other base stations use the same reference time for determining the time offset. The method may also include determining a current frame number based on the time offset.

Abstract: Certain embodiments provide techniques for background scanning in a wireless communication device receiving signals from multiple base stations using a background scanning processor separate from a receive processor. The techniques generally include buffering raw signal data from multiple base stations, forwarding the raw signal data to a receive baseband processor for decoding data from a first one of the base stations that is currently designated as a serving base station with an active connection to the wireless communications device, forwarding the raw signal data to a background scanning processor, separate from the receive baseband processor, and generating channel characteristics corresponding to the multiple base stations with the background scanning processor without interrupting the exchange of data with the first base station designated as the serving base station.

Abstract: Techniques presented herein allow a wireless device, (e.g., a mobile station, MS) to automatically enter a low power state when detecting silence based on monitored VoIP transmissions. Automatically entering the low power state may help the wireless device conserve power. In addition, for certain types of scheduling services in which bandwidth is allocated to the wireless device from within a system (e.g., Unsolicited Grant Service or extended real time polling service), automatically entering the low power state when silence is detected may also free up bandwidth (i.e., that would have otherwise been allocated to the wireless device entering the low power state) for allocation to other wireless devices in the system.

Abstract: A base station may be configured so that it operates in accordance with certain MAP transmission rules that may enable mobile stations to save battery power in certain situations. Upon receiving a MAP message, a mobile station may determine whether there is a burst allocated for the mobile station in the current frame by determining the value of at least one of the following: an idle users bit in the SUB-MAP pointer information element (IE), and a sleep users bit in the SUB-MAP pointer IE. The mobile station may discontinue processing of the MAP message and power down one or more components of the mobile station if there is not a burst allocated for the mobile station in the current frame.