Broadcom Corporation

Qualcomm Incorporated

Jin-Sheng Su

Vivek Ramaprasad

Tom Chin

Rami Mehio

Jacobus C Alberts

Yu Fu

Zhengming Li

Rami Mehlo

The present disclosure presents a method and an apparatus for network cognizant uplink transmissions during inter radio access technology (IRAT) handovers. For example, the method may include skipping inter radio access technology (IRAT) measurements during one or more dedicated channel (DCH) measurement occasion (DMO) or idle interval gaps of a transmission timing interval (TTI). The method further includes transmitting data on an uplink from a user equipment (UE) to a network entity during the entire duration of the TTI and determining whether the network entity is decoding the data transmitted on the uplink based on a response received from the network entity. As such, network cognizant uplink transmissions during inter radio access technology (IRAT) handovers may be achieved.

Method and apparatus for network cognizant uplink transmissions during IRAT handovers

A user equipment (UE) with multiple receive chains and one or more subscriber identity modules improves radio access technology (RAT) measurements when one or more of the subscriber identity modules are active and valid measurement gaps or consecutive idle time slots are unavailable for the radio access technology measurements. The UE communicates with a first receive (RX) chain for a first subscriber identity module (SIM). The UE also performs the radio access technology (RAT) measurement with a second receive (RX) chain while maintaining communications with the first receive chain.

Inter radio access technology measurement with multiple receivers

Techniques, systems and apparatus are described for reducing battery power consumption during a discontinuous reception and transmission mode of operation of a communication device. When operating in the discontinuous reception and transmission mode, a communication device can process radio frequency signals received from base stations to identify a set of active base stations based on a quality of the received radio frequency signals. This can reduce the total number of base stations to decode the corresponding system frame number (SFN). Based on the decoded SFN, the communication device can select a base station to perform hand-off.

Reducing battery power consumption during discontinuous reception and transmission

Systems and methods according to embodiments of the present invention are provided for increasing the power efficiency of a communications device by allowing it to support dual-SIM functionality while issuing simultaneous wake ups for each SIM. Embodiments of the present invention leverage time sharing solutions to minimize the amount of circuitry needed in a communications device to issue wake ups while avoiding the drawbacks of other time sharing solutions that result in increased overhead due to requiring multiple transitions from an idle state to an active state.

Systems and methods for reducing power consumption of a communications device using multiple elements in a receiver chain

A scheduling technique is described for discontinuous transmission and reception. The scheduling technique may be implemented in a mobile communication device with multiple SIMs. The scheduling technique facilitates enhanced communication capability for the mobile communication device. In one implementation, the scheduling technique helps avoid substantial overlap between discontinuous receive cycles of the SIMs, for example by renegotiating a discontinuous transmit/receive offset if too much overlap exists. The renegotiation process may be incorporated into a future industry standard communication protocol (e.g., 3GPP release 11 or later), or may be implemented as an extension to an existing communication protocol.

Enhanced discontinuous mode operation with shared radio frequency resources

A technique for receiving paging information helps a mobile communication device with multiple SIMs to better determine that a call is incoming. Despite the paging indicators for both SIMs arriving in a manner that prevents both the paging indicators from being received, the technique is able to ascertain whether a SIM is being paged, even when the other SIM is currently on the radio interface. As a result, the mobile communication device exhibits an increased ability to detect and alert the user to incoming calls.

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San Diego, CA, United States of America

Jin-Sheng Su