Abstract:
A method and apparatus (500) for compiling a protocol data unit (PDU) having a predetermined length from at least one data block for transmission in a wireless communication system. At least one data block is designated for transmission. The data block is first stored in a memory (504). A data block information list (506) and a data block address list (508) are generated for the data block. The data block information list contains the length of the data block which is to be included within the PDU and the data block address list contains the memory address of data block which is to be included in the PDU. The PDU is then compiled by (502) utilizing the data block information list and the data block address list when the PDU is ready for transmission.
Abstract:
A wireless transmit/receive unit (WTRU) and method for wireless uplink communication to and downlink communication from a wireless network are provided. The WTRU has a selectively configurable transceiver that has a network connected mode defined by a plurality of functional states including at least one monitoring state and a duplex state. The transceiver is configured to transition from a monitoring state upon occurrence of predefined WTRU events that are each associated with a respective uplink procedure initiation communication where at least one of procedures results in a network response that includes a temporary identifier. The transceiver is configurable into a transition state wherein the transceiver is configured to send only the uplink initiation communications and is otherwise configured only for downlink communications.
Abstract:
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for generating N initial antenna patterns for receiving N different summations of the M source signals, with N being less than M. The antenna array includes an elevation controller for selectively changing an elevation of at least one of the N initial antenna patterns for generating at least one additional antenna pattern so that at least one additional different summation of the M source signals is received thereby. A blind signal separation processor forms a mixing matrix comprising the N different summations of the M source signals, and the at least one additional different summation of the M source signals. The mixing matrix has a rank equal to N plus the number of additional different summations of the M source signals received using the additional antenna patterns. The blind signal separation processor separates desired source signals from the mixing matrix.
Abstract:
A method for reducing latency in transmitting an acknowledgement (ACK) in a mesh network begins by receiving a data packet at an intermediate node from a source node. The intermediate node generates an ACK upon receipt of the data packet. The intermediate node then forwards the data packet to a target node, including the ACK in the forwarded data packet. By combining the ACK with the data packet, the source node receives the ACK while the target node receives the data packet.
Abstract:
The present invention is related to a method and system for optimization of channel estimation and synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) Multiple-Input Multiple-Output (MIMO) wireless communication system. In accordance with the present invention, all of the training sequences are simply constructed based on a basic code by cyclically shifting the basic code. The training sequences are transmitted from different antennas in parallel without performing inverse fast Fourier transform. As a result, there is no peak-to-average ratio problem. Channel estimation is performed in each receiver based on the samples before fast Fourier transform and the maximum-likelihood estimate of channel response in time domain is then mapped into the frequency domain. The channel estimation is not only very simple in implementation, but also very efficient in computation.
Abstract:
A receiver (fig.2) comprises a plurality of antenna elements (210) for receiving a data signal. Each antenna element (210) has a plurality of Rake fingers (200). Each Rake finger (200) processes a received multipath component of the received data signal of its antenna element (210) by applying a complex weight gain to that received multipath component. A complex weight gain generator (205) determines the complex weight gain for each Rake finger (200) for each antenna element (210) using an input from all the Rake fingers (200). A summer (225) combines an output of each Rake finger (200) to produce an estimate of the data signal.
Abstract:
The invention provides various embodiments for radio resource management. In one embodiment, resources are assigned to users in a slotted wireless communication system having candidate timeslots. An interference level is determined for each candidate timeslot. An amount of resources available for assignment in each candidate timeslot is determined. A measurement of fragmentation of codes in an orthogonal variable spreading factor (OVSF) tree in each candidate timeslot is determined. A Figure of Merit for each time slot is determined using the determined interference level, the amount of available resources and the code fragmentation in the OVSF tree for each candidate timeslot. The resources are assigned from the candidate timeslot having a best Figure of Merit.
Abstract:
A method for performing outer loop power control in a wireless communication system utilizing a plurality of transport channels begins by selecting an initial reference transport channel (TrCH) and a final reference TrCH. Outer loop power control is performed using the initial reference TrCH and then outer loop power control is performed using the final reference TrCH.
Abstract:
A wireless communication method and system for controlling an enhanced uplink (EU) radio access bearer (RAB). The wireless communication system includes at least one wireless transmit/receive unit (WTRU), at least one Node-B and a radio network controller (RNC). The RNC configures an EU RAB to operate on an enhanced dedicated channel (E-DCH). At least one of the WTRU and the Node-B report EU traffic statistics and EU performance statistics to the RNC. The RNC then adjusts the configuration of the EU RAB in accordance with the received EU traffic statistics, the EU performance statistics, and information collected by the RNC itself.
Abstract:
Location of a portable device with a transmitter, such as a wireless transmit/receive unit (WTRU) in a cellular telecommunications network, is obtained by a primary network augmented by data obtained from a diverse network. In a particular configuration, changes of the indication of the location of the portable device are used to update positional information, such as positional information obtained from a GPS receiver.