Abstract:
A user equipment (UE) may save power by reducing certain battery draining activities when a user is not close to or not using the UE. The UE may skip inter-radio access technology measurements to conserve battery life. The UE may also extend a paging periodicity when the battery power is low and/or when a sensor detects UE inactivity or a distant user.
Abstract:
A method of wireless communication in a dual subscriber identification module (SIM) terminal includes transmitting a first synchronization message from a first module associated with a first SIM. The method also includes receiving a first acknowledgment (ACK) message on a fast physical access channel (FPACH) in response to the first synchronization message. The method further includes sharing timing information included in the first ACK between the first module and a second module.
Abstract:
Physical layer bits in a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system control a baton handover. A method for enabling a baton handover from a source cell to a target cell includes tuning an uplink from a source channel of the source cell to a target channel of the target cell. The method also includes receiving a physical layer downlink switch command to switch a downlink from the source cell to the target cell. The method further includes tuning the downlink from the source channel of the source cell to the target channel of the target cell, in response to the physical layer downlink switch command, thus implementing the handover from the source cell to the target cell.
Abstract:
Certain aspects of the present disclosure provide techniques and apparatus for uplink synchronization of a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) multiple Universal Subscriber Identity Module (USIM) mobile terminal during a handover. For certain aspects, a method of wireless communication generally includes transmitting, to a Node B, at least one uplink synchronization code from a UE comprising at least a first subscriber identity and a second subscriber identity, receiving timing information for uplink synchronization to the Node B, wherein the timing information is measured based on the at least one uplink synchronization code, and applying the timing information to calls for both of the first and second subscriber identities to synchronize uplink transmissions to the Node B.
Abstract:
Methods and apparatus are provided for selecting identifying numbers associated with a mobile station (MS) having multiple subscriber identity modules (SIMs) such that the paging intervals for both identifying numbers are aligned. The MS having multiple SIMs may operate in a network via a particular radio access technology (RAT), such as Code Division Multiple Access (CDMA) 1×RTT (1 times Radio Transmission Technology). By having aligned paging intervals, the MS may wake up only once during the paging cycles for the various identifying numbers rather than waking up multiple times, thereby reducing power consumption of the MS during idle mode compared to a conventional MS with multiple SIMs, and thus multiple identifying numbers.
Abstract:
In geographical areas with incomplete coverage of Time Division Synchronous Code Division Multiple Access (TD-SCDMA) networks, it may be beneficial for a multimode User Equipment (UE) to handover to a Global System for Mobile Communications (GSM) network. Before handover, a multimode UE may receive an indication from a serving TD-SCDMA cell to enter a Discontinuous Reception (DRX) mode and perform measurement on a nearby GSM cell. After measurement, the UE receives a grant from the serving TD-SCDMA cell allowing the UE to transmit a measurement report to the serving TD-SCDMA cell. The TD-SCDMA cell may use the measurement report to determine if the multimode UE should handover to the GSM cell.
Abstract:
Certain embodiments of the present disclosure provide a unified scheme for selecting an operator and a radio access technology (RAT) by a multi-mode wireless device during a power-up or a handover process. By utilizing the proposed scheme, the mobile station may switch between RATs that are associated with the Worldwide Interoperability for Microwave Access (WiMAX), 3rd Generation Partnership Project (3GPP) or 3GPP2 standards.
Abstract:
Aspects of the present disclosure allow a mobile station (MS) to maintain data activity while performing handover operations within the WiMAX network and listening to a CDMA 1x paging cycle. According to aspects, the MS maintains timing of a base station (BS) in a first radio access technology (RAT) and a BS in a second RAT. The MS may determine an expected timing of a paging cycle in the second RAT and send a sleep request to the BS in the first RAT such that the sleep interval coincides with the timing of the paging cycle in the second RAT. The MS may perform operations to ensure a sleep interval, after performing handover operations, coincides with the timing of the paging cycle in the second RAT.
Abstract:
Techniques for deriving message counts based at least in part on a locally stored message count and at least a portion of a message count received from a remote network node are disclosed. The message counts can relate to downlink (DL) non-access stratum (NAS) counts. In one aspect, a device can receive a number of least significant bits of the DL NAS count in a handover message. The device can derive a DL NAS count by utilizing a remaining portion of most significant bits of a locally stored DL NAS count, and can determine whether to increment or decrement the most significant bits based at least in part on a parameter to handle cases where the least significant bits of the locally stored DL NAS count have wrapped due to overflow and/or underflow.
Abstract:
When a user equipment engaged in mobile communications transfers from a network with one radio access technology (RAT) to another network with a different radio access technology, maintaining continuity of location based services can improve system performance. A user equipment may perform a series of checks when undergoing inter-RAT transfer to determine if a location based services protocol used with the source network is operable on the target network. The UE also determines if location based services sessions are at a point where they can be continued following inter-RAT transfer. Where possible, protocols and sessions are maintained to preserve location based services continuity.