Ericsson Gmbh

Telefonaktiebolaget Lm Ericsson (publ)

General Electric Company

Ericsson Ge Mobile Communications Inc.

Unwired Planet, LLC

Optis Cellular Technology, LLC

Rajaram Ramesh

Havish Koorapaty

Kumar Balachandran

Gregory Edward Bottomley

Sandeep Chennakeshu

Karl James Molnar

Amer A Hassan

Jung-Fu Cheng

Paul Wilkinson Dent

Yi-Pin Eric Wang

Kambiz Casey Zangi

Essam Abdelfattah Sourour

Dennis Hui

Alex Krister Raith

R David Koilpillai

Greg Bottomley

Ali S Khayrallah

Stanley L Reinhold

Barbara Davis Molnar

Huseyin Arslan

Stephen J Grant

William O Camp, Jr

Leonid Krasny

Tomas Frankkila

Per Ernström

Tracy Lawrence Fulghum

Ravinder David Koilpillai

Clarence V Roberts

David Barrow

John Walter Diachina

Jiann-Ching Guey

Carmela Cozzo

Gunnar Rydnell

Abdulrauf Hafeez

David R Irvin

Wayne E Stark

Jacobus C Haartsen

Raymond L Toy

Roozbeh Atarius

Tsao-Tsen Chen

John B Anderson

Thomas M Croft

Kiran Thakare

Carlos E Vidales

Eric Yi-Pin Wang

Richard H Myers

Tripurasundari Ramesh

Ayman Mostafa

Pambiz Zangi

Larry W Massengill

Jung-fu Thomas Cheng

A wireless telecommunications network supplies a semi-persistent resource that a wireless station can use for special purposes (such as a retransmission of packets for ARQ purposes or a control signal. The semi-persistent resource can be allocated by the system to other terminals if, e.g., a retransmission is not required. Since a retransmission is generally performed in response to a NACK received from a base station, the NACK may itself serve as a token that permits the wireless station to use the semi-persistent allocation. Thus, the technology includes, e.g., a method for resource allocation on a semi-persistent basis and efficient signaling for the usage of such allocation.

Semi-persistent resource allocation method for uplink transmission in wireless packet data systems

The iterative decoding of blocks may be continued or terminated based on CRC checks. In an example embodiment, one iteration of an iterative decoding process is performed on a block whose information bits are covered by a CRC. The iterative decoding process is stopped if the CRC checks for a predetermined number of consecutive iterations. In another example embodiment, a decoding iteration is performed on a particular sub-block of multiple sub-blocks of a transport block, which includes a single CRC over an entirety of the transport block. The CRC is checked using decoded bits obtained from the decoding iteration on the particular sub-block and decoded bits obtained from previous decoding iterations on other sub-blocks of the multiple sub-blocks. The decoding iteration is then performed on a different sub-block if the CRC does not check. Also, the decoding iterations for the sub-blocks may be terminated if the CRC checks.

Iterative decoding of blocks with cyclic redundancy checks

A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing.

Method and apparatus for signal quality loss compensation in multiplexing transmission systems

The technology provides a frame handler, a controller, and a frame structure design for a new radio communications system that provides backward compatibility with an existing or legacy radio communications system with lower signal bandwidth. Data to be transmitted to the new and legacy radio terminals is processed into a frame using a frame format that is compatible with both the new radio access technology system and the legacy radio access technology system so that both types of radio terminals may receive and extract data from the frame intended for each of those radio terminals. The format allows new and legacy radio terminal communications across the different bandwidths employed by the new and legacy systems.

Multiple compatible OFDM systems with different bandwidths

The present invention sends multiple versions of a multimedia packet to the base station, and, based on the radio channel and traffic characteristics, an appropriate version of the multimedia packet is selected to send to the mobile station at a given time. In this way, source transmission is improved to instantaneous conditions. The steps of the present invention are performed in conjunction with RTP used for multimedia transmission over internet protocol (IP) networks. In a first embodiment, the multiple versions are sent to the base station in the same RTP packet, and the base station strips out the extraneous versions. In a second embodiment, the base station receives multiple RTP packets having identical information in the packet header in many fields, and selects an appropriate one among these for transmission to the mobile station, discarding the rest.

Method and apparatus for efficient multimedia delivery in a wireless packet network

A method of channel estimation for a signal having a first portion transmitted using a transmit delay diversity scheme and a second portion transmitted using another multi-antenna transmission scheme includes determining a composite channel estimate from the transmit delay diversity portion of the signal. The method continues with segregating the composite channel estimate into delay groups corresponding to time offsets of the transmit delay diversity scheme for determination of first channel estimates for each subset of transmit antennas. Second channel estimates are determined for each subset of transmit antennas as a function of pilot symbols received in the second portion of the signal and corresponding ones of the first channel estimates. Thus, the first channel estimates are used to improve estimation of the second channel estimates. The method and variations of it may be implemented by configuring one or more processing circuits within a receiver circuit.

Method and apparatus for channel estimation in a transmit diversity environment

A multi-pilot frame handler () of a radio access network node () is arranged to prepare a block of a frame of information to include a first pilot signal of a pilot signal first type and a first pilot signal of a pilot signal second type. The pilot signal of the pilot signal first type is expressed as a first Costas array base pattern of resource elements of the block; the pilot signal of the second type is expressed as a second Costas array base pattern of resource elements of the block. The multi-pilot frame handler () is arranged to prepare the block so that any pilot signal of the pilot signal first type is carried by at least some subcarriers of a first set of subcarriers of the block and any pilot signal of the pilot signal second type is carried by at least some subcarriers of a second set of subcarriers of the block.

Pilot design using costas arrays

In an orthogonal frequency division multiple access communication system, unused frequency resources during a conventional preamble signal are used for a quick paging mechanism. A set of quick paging signals is sent over the unused frequency resources to signal one or more subscriber stations.

Quick paging in telecommunication systems

Methods and apparatus for allocating time-frequency resources to mobile terminals in a wireless communications system in which time-frequency resources may be selectively used according to a first multiple-input multiple-output (MIMO) transmission scheme or a second MIMO transmission scheme that differs from the first MIMO transmission scheme. An exemplary method comprises, for at least a first scheduling instance, identifying a first group of mobile terminals corresponding to the first MIMO transmission scheme and a second group of mobile terminals corresponding to the second MIMO transmission scheme, allocating time-frequency resources in a first pre-determined time-frequency zone exclusively to mobile terminals belonging to the first group, and allocating time-frequency resources in one or more additional pre-determined time-frequency zones to one or more mobile terminals belonging to the second group. This method may be implemented in a base station of a WiMAX system, for example.

System, method, and apparatus for improved space-time coding and dynamic switching with advanced receivers

A convolutional encoder () comprises an expurgation unit () and a first component convolutional encoder section (). A convolutional turbo encoder () comprises an expurgation unit (); a first component convolutional encoder section (); a second component convolutional encoder section (); and an interleaver (). For both the convolutional encoder () and the expurgating convolutional turbo encoder () the expurgation unit () inserts predetermined values at selected bit positions of an input bit sequence and thereby provide an expurgated input bit sequence. A lower rate convolutional code is obtained from a higher rate code via expurgation.

Encoding and decoding methods for expurgated convolutional codes and convolutional turbo codes

Code words are assigned to subscriber stations or groups of subscriber stations in a communication network for a quick paging mechanism in which the assigned code words are transmitted as quick paging signals over unused frequency resources to signal the subscriber stations. Subsets of multiple code words from a set of code words can be assigned to respective paging groups, and overlapping subsets can be assigned to multiple paging groups. This enables a single code word to be used to address either a single paging group or multiple paging groups.

Code word assignment methods for quick paging in telecommunication systems

The present invention provides systems and methods that enable a base station to consume less power. According to an embodiment of the invention, the base station reduces its power consumption by not continuously broadcasting control information. In such an embodiment, a mobile station that seeks access to a network to which the base station provides access does not search for broadcast control information prior to transmitting an access message to the base station, but rather simply transmits on a predetermined access channel an access request message. A base station that receives the access request message may unicast control information to the mobile station.

System and methods for reducing power consumed by a base station

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Raleigh, NC, United States of America

Rajaram Ramesh