Abstract:
Methods and apparatus are provided for performing measurement of reference signals in the proper subframes of a first radio access technology (RAT) while operating in a second RAT. For certain aspects, the first and second RATs may be Time Division Duplex Long Term Evolution (TDD-LTE) and Time Division—Synchronous Code Division Multiple Access (TD-SCDMA), respectively. By knowing the correct TDD-LTE downlink and uplink subframe configurations, a user equipment device (UE) may temporarily leave the TD-SCDMA network during an idle interval and perform expedited and accurate measurement of TDD-LTE reference signals without errors from trying to measure reference signals during uplink subframes.
Abstract:
Methods and apparatus for establishing multiple connections between a wireless device and multiple base stations and transferring data using these connections via different segments of an orthogonal frequency division multiple access (OFDMA) frame are provided. The multiple connections may be used for multi-way (e.g., three-way) concurrent processing, multi-way (e.g., three-way) handover, or a hybrid between concurrent processing and multi-way handover in an effort to increase data throughput for the wireless device.
Abstract:
An apparatus and method enable mobile user equipment to return to a first cell after attempting a baton handover to a second cell. In one aspect of the disclosure, a method of wireless communication in a cellular network including a source cell and a target cell is disclosed. Here, the method includes switching transmission of an uplink from the source cell to the target cell while maintaining a downlink with the source cell, determining to return the transmission of the uplink to the source cell, and returning the transmission of the uplink from the target cell to the source cell. In some aspects, the method may further include switching reception of a downlink from the source cell to the target cell, determining to return the reception of the downlink to the source cell, and returning the reception of the downlink from the target cell to the source cell.
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:
Certain aspects of the present disclosure propose techniques for continuing high-speed packet access (HSPA) during the baton handover in Target Cell Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems. In an aspect of the disclosure, a technique for performing a baton handover from a source node B (NB) to a target NB by a user equipment (UE) is provided. The technique generally includes receiving a first signal instructing the UE to perform the baton handover from the source NB to the target NB, transmitting data in uplink transmissions to the target NB during the baton handover, and receiving, from the source NB, information regarding the uplink transmissions.
Abstract:
Certain aspects of the present disclosure relate to a method for improving location area and routing area update procedures in a multiple-USIM mobile terminal. A technique is provided for allowing the mobile terminal to reduce update procedures by using a message for multiple USIMs. The discussed technique reduces the number of messages exchanged and CPU processing.
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 register with and monitor paging channels of a Base Transceiver Station (BTS) of a Code Division Multiple Access (CDMA) 1× Radio Transmission Technology (RTT). The UE may monitor the paging channels of the BTS of the CDMA 1× RTT network by entering discontinuous reception (DRX) from the Node B of the TD-SCDMA network. The Node B of the TD-SCDMA network schedules the UE's DRX to coincide with the paging interval appropriate for the UE determined by the UE's IMSI and network time information. After monitoring the paging channel, the UE reacquires the Node B of the TD-SCDMA network and receives data and HARQ transmissions.
Abstract:
Certain aspects of the present disclosure propose techniques and apparatus of fast system selection for a multimode terminal that can support both Time Division Synchronous Code Division Multiple Access (TD-SCDMA) technology and Global System for Mobile communications (GSM) technology.
Abstract:
Certain aspects of the present disclosure propose techniques and apparatus for pre-uplink synchronization in Time Division Synchronous Code Division Multiple Access (TD-SCDMA) handover.
Abstract:
Methods and apparatuses are provided that pausing transmission control protocol (TCP) transmissions during or following handover to prevent unwarranted duplicated acknowledgement transmission, which can cause decrease in TCP window size. During handover, transmission on-hold commands can be sent to a TCP layer that indicate to prepare to pause TCP transmissions, immediately pause TCP transmissions, and/or the like. Transmission resume commands can be sent to the TCP layer following handover. In addition, TCP transmissions can be paused following handover to allow data forwarding data to be provisioned to a device from a target base station without duplicated acknowledgement transmission.