Abstract:
Aspects are described for a user equipment (UE) comprising a transceiver configured to enable wireless communication with a base station; and a processor communicatively coupled to the transceiver. The processor is configured to receive a sounding reference signal (SRS) resource configuration from the base station, wherein the SRS resource configuration indicates at least a first SRS resource and a second SRS resource. The processor is further configured to transmit a first SRS via the first SRS resource to the base station using a first antenna coupled to the transceiver and transmit a second SRS via the second SRS resource to the base station using a second antenna coupled to the transceiver. The processor is further configured to receive an SRS resource indicator (SRI) from the base station based on at least one of the transmission of the first SRS or the second SRS; select the first antenna based on the SRI indicating the first SRS resource; and transmit uplink data to the base station using the first antenna.
Abstract:
Systems and methods for reducing collisions of transmission data for a first subscriber (e.g., a voice subscriber) with transmission data for a second subscriber (e.g., a data subscriber) at a dual sim dual active (DSDA) user equipment (UE) are described herein. A DSDA UE may be configured to implement a modified skipUplinkTxDynamic feature that avoids collisions by buffering transmission data of the data subscriber and sending a (later) scheduling request (SR) for a grant for that data. A DSDA UE may regulate data subscriber transmissions to avoid a transmission duration for the voice subscriber. A DSDA UE may reduce certain transmissions for a voice subscriber (subject to a block error rate (BLER) threshold for the voice subscriber) to lower the probability of collision. A DSDA UE may operate a data subscriber and a voice subscriber in the same cell to avoid collisions due to RF tuning and/or relative slot overlap.
Abstract:
This disclosure relates to techniques for performing radio link monitoring and cell searching when moving at high speeds. A movement speed of a wireless device may be determined. When performing a cell search, the manner of the cell search may depend on the movement speed of the wireless device, potentially including cells that are associated with high movement speed being more highly prioritized when the wireless device is determined to be at a higher movement speed than when the wireless device is determined to be at a lower movement speed.
Abstract:
An apparatus to support subscriber identity modules in a wireless accessory device is disclosed. The wireless accessory device includes a subscriber identity module and an interface to interconnect the wireless accessory device to a wireless communication device, where the subscriber identity module provides information to the wireless communication device through the interface to enable the wireless communication device to authenticate with a wireless network using a subscriber identity associated with the subscriber identity module. The subscriber identity module is installed on a removable universal integrated circuit card in the wireless accessory device or is an electronic subscriber identity module installed on an embedded universal integrated circuit card permanently affixed to a circuit board in the wireless accessory device. In some embodiments, the wireless accessory device provides credentials for the wireless communication device to register with and/or establish connections to the wireless network.
Abstract:
Apparatus and methods to support parallel communication using multiple subscriber identities in a wireless communication device via multiple subscriber identity modules (SIMs) are disclosed. A representative method includes establishing a connection with a first wireless network via a first wireless cellular protocol software stack for a first subscriber identity associated with a first subscriber identity module; registering with a second wireless network via a second wireless cellular protocol software stack for a second subscriber identity associated with a second subscriber identity module; and receiving radio frequency signals from the second wireless network via the second wireless cellular protocol software stack in parallel with communicating with the first wireless network via the first wireless cellular protocol software stack. The first and second wireless cellular protocol software stacks share at least a portion of radio frequency wireless circuitry for communicating with the first and second wireless network respectively.
Abstract:
A user equipment (UE) includes a first subscriber identification module (SIM) and a second SIM. The UE is configured to establish a first cellular network connection based on, at least, the first SIM and a second cellular network connection based on, at least, the second SIM. The UE detects a collision between i) multiple paging occasions or ii) multiple paging frames. The UE then initiates a procedure for updating a paging occasion for the first cellular network connection. The UE monitors for a page over the first cellular network connection during the paging occasion.
Abstract:
Apparatus and methods to support multiple subscriber identities in a wireless communication device are disclosed. A representative method includes dividing a set of mobility management tasks between a first wireless cellular protocol software stack and a second wireless cellular protocol software stack; executing the set of mobility management tasks in parallel when the first wireless cellular protocol software stack is associated with but not connected to a first wireless network and the second wireless cellular protocol software stack is associated with but not connected to a second wireless network; and sharing information obtained from the execution between the first and second wireless cellular protocol software stacks. Representative mobility management tasks include searching for public land mobile networks, measuring serving cells and/or neighbor cells, and evaluating cell reselection and handover options. Representative information shared between the wireless cellular protocol software stacks includes cell measurements, cell lists, and/or wireless circuitry settings.
Abstract:
Apparatus and methods to support multiple subscriber identities in a wireless communication device are disclosed. A representative method includes the wireless communication device communicating with a first wireless network via a first wireless cellular protocol software stack for a first subscriber identity provided by a first subscriber identity module; communicating with a second wireless network via a second wireless cellular protocol software stack for a second subscriber identity provided by a second subscriber identity module; and sharing mobility management tasks between the first and second wireless cellular protocol software stacks when the first and second subscriber identity modules are each associated with the same wireless network provider either as a serving carrier or as a roaming carrier. Mobility management tasks that are shared include one or more of paging channel monitoring, measuring a serving cell and/or neighbor cells, evaluating cell reselection and handover options, and reading broadcast channels.
Abstract:
A method for reducing network service scan time by a wireless communication device is provided. The method can include the wireless communication device determining a location of the wireless communication device. The method can further include the wireless communication devices selecting a subset of RATs supported by the wireless communication device based at least in part on the location of the wireless communication device and on deployment mapping information. The selected subset can include only one or more RATs indicated by the deployment mapping information to be deployed in the location of the wireless communication device. The method can further include the wireless communication device performing a service scan for at least one RAT included in the selected subset. Any RAT of the RATs supported by the wireless communication device that is not included in the selected subset can be excluded from the service scan.
Abstract:
A mobile device collects received information and processes it. In some instances, the mobile device detects, based on the collected information, that a base station is likely not legitimate, i.e. , it is likely a fake base station, and the mobile device bars communication with the base station for a time. In some embodiments, the mobile device determines, based on the received information, that the base station is a genuine base station. When the mobile device determines that the base station is a genuine base station or the mobile device does not determine that it is likely the base station is a fake base station, the mobile device allows or continues communication with the base station.