Abstract:
A method and apparatus for facilitating user equipment backoff during a random access procedure is provided. The method may comprise transmitting, by a user equipment (UE), at least one synchronization code to a Node B, determining that the at least one transmitted synchronization code was not acknowledged by the Node B, and modifying a maximum value of a random delay window in response to said determining.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided in which the method of wireless communication includes identifying a reference cell; selecting a plurality of candidate cells based on a criteria; determining a characteristic for the reference cell and the plurality of candidate cells; and setting a position based on the determined characteristic.
Abstract:
A method and apparatus for providing handover trigger mechanisms using multiple metrics in a TD-SCDMA system is provided. The method may comprise determining if a difference between a distance from a UE to a neighbor Node B and a distance from the UE to a serving Node B meets a criteria, and determining whether to perform a handover from said serving Node B to said neighbor Node B based on whether the determined difference meets the criteria.
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:
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:
A method and apparatus for avoiding Physical Random Access Channel collisions is provided. The method may comprise transmitting, by a first user equipment (UE), a first access request using a synchronization code in a subframe to a Node B, and receiving an acknowledgement from the Node B, wherein the acknowledgement indicates that a second UE has transmitted a second access request in the subframe using the synchronization code. Further, the method may comprise receiving, in a sub-frame, a first synchronization code from a first UE and a second synchronization code from a second UE, and preventing transmission of an acknowledgment to both the first and second UEs based on a determination that the received first and second synchronization codes are the same.
Abstract:
A method for wireless communication comprises switching an uplink (UL) from a source cell to a target cell; and receiving an uplink transmit power control (TPC-UL) command from the source cell, wherein the TPC-UL command is generated by the target cell.
Abstract:
Certain aspects of the present disclosure propose techniques for synchronizing TD-SCDMA and TDD-LTE systems. Certain aspects provide a method that generally includes obtaining, from a base station (BS) of a first radio access technology (RAT), timing and a system frame number (SFN) for a BS of a second RAT, and performing network acquisition operations with the BS of the second RAT using the timing and the SFN.
Abstract:
Certain aspects of the present disclosure propose techniques for performing a baton handover from TDD-LTE to TD-SCDMA systems. Certain aspects provide a method that generally includes receiving a handover command to handover from a base station (BS) of a first radio access technology (RAT) to a BS of a second RAT, switching uplink (UL) transmission from the BS of the first RAT to the BS of the second RAT, maintaining downlink (DL) transmission with the BS of the first RAT after switching the UL transmission to the BS of the second RAT, and switching the DL transmission from the BS of the first RAT to the BS of the second RAT after switching the UL transmission to the BS of the second RAT.
Abstract:
A method for efficiently transmitting control information may include allocating a portion of orthogonal frequency division multiple access (OFDMA) frames for transmission of a code division multiple access (CDMA) based signal. The CDMA-based signal may include data from one or more dedicated control channels. The method may also include converting the CDMA-based signal into a format that is suitable for transmission via OFDMA techniques. The method may also include transmitting the converted CDMA-based signal using a subset of available OFDMA subcarriers.