Abstract:
A synchronization method used in a receiving terminal of an orthogonal frequency division multiplexing (OFDM) system is illustrated. The synchronization method includes following steps: (a) receiving an OFDM training symbol at the receiving terminal, wherein the OFDM training symbol includes many sample points; (b) calculating first function values according to the sample points by using a first function; (c) selecting D timing points from many timing points corresponding to the first function values, wherein D first function values of the D timing points are larger than a first threshold value; (d) calculating D second function values of the D timing points by using a second function; and (e) selecting a first timing point from the D timing points, and setting the first timing point as a timing synchronization point, wherein the second function value of the first timing point is a first one greater than a second threshold value.
Abstract:
An apparatus for performing a soft handoff including a power estimator, cell selector, and feedback channel generator. The power estimator receives a plurality of pilot signals that each correspond to an associated base station within an active set registry, and estimates a power level for each of the plurality of pilot signals. The cell selector is coupled to the power estimator, and is configured to select one or more base stations within the active set registry for selective blanking of a corresponding one or more of the plurality of pilot signals during a soft handoff operation. The feedback channel generator is coupled to the cell selector, and is configured to generate a cell selection feedback signal indicating the one or more base stations, where the cell selection feedback signal is subsequently transmitted to the one or more base stations, and where the cell selection feedback signal directs the one or more base stations to perform the selective blanking.
Abstract:
A service network for handling abnormal interrupts, including tracking area updates, lower layer failures, and guard timer expiries, during an attach procedure with a user equipment is provided. The service network includes a radio access network and a control node. When the radio access network detecting an abnormal interrupt, the control node aborts the attach procedure by sending a detach request message, via the radio access network, to the user equipment.
Abstract:
A wear leveling method for a non-volatile memory is provided. The non-volatile memory includes a plurality of data blocks, each corresponding to a time value. The data blocks are arranged according to a sequence of the time values corresponding thereto. The arranged blocks form a key table. An erase operation is determined whether to be executed for the data blocks. When the erase operation is executed for the data blocks, the corresponding data block is erased according to a sequence of the time values of the data blocks in the key table.
Abstract:
A method for acquiring time synchronization and location information with a Femtocell includes an access point base station conveying an activation request to a service provider through a wired connection, where the service provider provides wireless communication in a macro area, and where the access point base station provides wireless communication in a local area. The method also includes the access point base station performing a first plurality of procedures to acquire a time synchronization and a second plurality of procedures to acquire a location of the access point base station.
Abstract:
Automatic provisioning of an access point base station or femtocell. The method may include the femtocell transmitting first information (e.g., location information, signal measurement information, capability information, etc.) to a service provider (e.g., over an IP network). The femtocell may receive second information from the service provider, where the second information includes one or more operational parameters. The operational parameters may include hand-off parameters, admission policy parameters, PN or scrambling codes, power parameters, and/or other parameters. The femtocell may operate according to the received parameters to provide access for a plurality of access terminals in a local area.
Abstract:
Automatic provisioning of an access point base station or femtocell. The method may include the femtocell transmitting first information (e.g., location information, signal measurement information, capability information, etc.) to a service provider (e.g., over an IP network). The femtocell may receive second information from the service provider, where the second information includes one or more operational parameters. The operational parameters may include hand-off parameters, admission policy parameters, PN or scrambling codes, power parameters, and/or other parameters. The femtocell may operate according to the received parameters to provide access for a plurality of access terminals in a local area.
Abstract:
A control channel encoder, e.g., in a UMB system, uses a channel structure that can efficiently transmit more information bits, yet achieve sufficient detection and false alarm performance. A control channel encoder can use a fixed encoder packet size, tail-biting convolutional coding, and Cyclical Redundancy Check (CRC). A control channel decoder can use Viterbi Decoding and a circular trellis check.
Abstract:
Provided is a multi-layered transmission technique in which a signal indicating that a transmitted data packet has been correctly received by the receiver is provided from one communication layer to another. Based on that signal, the second layer releases the corresponding data from its retransmission buffer. As result, storage requirements for data waiting to be retransmitted, if necessary, often can be significantly reduced.
Abstract:
Automatic provisioning of an access point base station or femtocell. The method may include the femtocell transmitting first information (e.g., location information, signal measurement information, capability information, etc.) to a service provider (e.g., over an IP network). The femtocell may receive second information from the service provider, where the second information includes one or more operational parameters. The operational parameters may include hand-off parameters, admission policy parameters, PN or scrambling codes, power parameters, and/or other parameters. The femtocell may operate according to the received parameters to provide access for a plurality of access terminals in a local area.