公开(公告)号：EP1407420A4

公开(公告)日：2008-05-21

申请号：EP02739608

申请日：2002-05-31

申请人： FLARION TECHNOLOGIES INC

发明人： RICHARDSON TOM ,  NOVICHKOV VLADIMIR

IPC分类号： H03M13/29 ,  G06N3/02 ,  H03M13/11

CPC分类号： H03M13/6356 ,  G06N3/02 ,  H03M13/1114 ,  H03M13/1131 ,  H03M13/1137 ,  H03M13/1148 ,  H03M13/116 ,  H03M13/1168 ,  H03M13/1177 ,  H03M13/6362 ,  H03M13/6505 ,  H03M13/6566

摘要： Methods and apparatus for decoding codewords (902) using message passing decoding techniques which are particularly well suited for use with low density parity check (LDPC) codes and long codewords are described. The described methods allow decoding graph structures which are largely comprised of multiple identical copies of a much smaller graph (1000). Copies of the smaller graph are subject to a controlled permutation operation (904) to create the larger graph structure. The same controlled permutations are directly implemented to support message passing between the replicated copies of the small graph. Messages corresponding to individual copies of the graph are stored in a memory and accessed in sets, one from each copy of the graph, using a SIMD read or write instruction. The graph permutation operation may be implemented by simply reordering messages, e.g., using a cyclic permutation operation, in each set of messages react out of a message memory so that the messages are passed to processing circuits corresponding to different copies of the small graph.

公开(公告)号：EP1421802A4

公开(公告)日：2008-04-09

申请号：EP02757093

申请日：2002-08-13

申请人： FLARION TECHNOLOGIES INC

发明人： LAROIA RAJIV ,  LI JUNYI ,  CORSON M SCOTT

IPC分类号： H04J11/00 ,  H04B7/005 ,  H04B7/26 ,  H04L7/00 ,  H04W36/18 ,  H04W52/02 ,  H04W52/40 ,  H04W56/00 ,  H04W88/02 ,  H04Q7/00

CPC分类号： H04W56/001 ,  H04W36/18 ,  H04W52/0203 ,  H04W52/0212 ,  H04W52/0245 ,  H04W52/40 ,  H04W56/00 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/20

摘要： Methods and apparatus which allow a wireless terminal (302) to simultaneously maintain connections with multiple base stations (304, 306) are described. Each wireless terminal (302) is capable of supporting multiple separate timing and/or other control loops one, for each base station connection thereby allowing the connections to operate independently and in parallel. Different control signals and/or data are transmitted on each connection that is established with a base station (302, 306). In this manner base stations (302, 306) receive different data allowing for asynchronous data transmission. The data received by the base stations (302, 306) can be supplied to a wired asynchronous network (308) without the need to combine the received data prior to supplying it to the wired network (308). The communications techniques of the invention can be used to implement soft handoffs without the need to duplicate data transmissions to multiple base stations.

摘要翻译： 描述允许无线终端（302）同时维护与多个基站（304,306）的连接的方法和装置。 每个无线终端（302）能够支持多个单独的定时和/或其他控制环路，每个基站连接由此允许连接独立且并行操作。 在与基站（302,306）建立的每个连接上发送不同的控制信号和/或数据。 以这种方式，基站（302,306）接收允许异步数据传输的不同数据。 由基站（302,306）接收的数据可以被提供给有线异步网络（308），而不需要在将接收到的数据提供给有线网络（308）之前组合。 本发明的通信技术可以用于实现软切换，而不需要复制到多个基站的数据传输。

公开(公告)号：EP1878145A1

公开(公告)日：2008-01-16

申请号：EP06737214.4

申请日：2006-03-07

申请人： Qualcomm Flarion Technologies, Inc.

发明人： LAROIA, Rajiv ,  JIN, Hui ,  RICHARDSON, Tom ,  LI, Junyi

IPC分类号： H04B14/02 ,  H04L5/04 ,  H04L27/34

CPC分类号： H04L1/0028 ,  H04B14/026 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0033 ,  H04L5/023 ,  H04L5/04 ,  H04L27/0008 ,  H04L27/2604 ,  H04L27/3488 ,  Y02D50/10

摘要： A stream of modulation symbols from a zero symbol rate (ZSR) coding/modulation module and a stream of modulation symbols from another type of coding/modulation module are input into an interweaver module. The interweaver module mixes the two input streams when assigning modulation symbols to be communicated in a segment. If a ZSR modulation symbol is non-zero, the ZSR modulation symbol is allocated a transmission position. If the ZSR modulation symbol is a zero modulation symbol, the modulation symbol from the other coding/modulation module is allocated the transmission position. The non-zero modulation symbols from the ZSR module are higher in power than the non-zero modulation symbols from the other module, thus facilitating detection and recovery.

公开(公告)号：EP1856877A1

公开(公告)日：2007-11-21

申请号：EP06738102.0

申请日：2006-03-08

申请人： Qualcomm Flarion Technologies, Inc.

发明人： LAROIA, Rajiv ,  LI, Junyi ,  LANE, Frank, A.

IPC分类号： H04L27/26

CPC分类号： H04L5/006 ,  H04L5/0023 ,  H04L5/0044

摘要： Base stations transmit strip signals using strip signal segments and self supporting modulation scheme techniques facilitating rapid channel estimate. A strip segment occupies one OFDM symbol time interval and uses a set of downlink tones; some, e.g., half, of the tones are left unused facilitating SIR measurement. The strip segments are advantageously timed to correspond to uplink access intervals in which connected wireless terminals do not typically transmit uplink signals. Connected wireless terminals including: multiple antennas used in combination, an antenna duplex module, single RF receiver chain and single RF transmitter chain, switch antenna coefficient combinations based on strip signal segment timing. The wireless terminal determines an independent downlink channel quality measurement, e.g., SNR and/or SIR for each strip signal segment and for on-going non-strip signaling. The wireless terminal compares channel quality measurements and selects an antenna coefficient combination to be used during non-strip signaling intervals obtaining very good antenna gain.

公开(公告)号：EP1810430A1

公开(公告)日：2007-07-25

申请号：EP05804327.4

申请日：2005-10-12

申请人： Flarion Technologies, INC.

发明人： LAROIA, Rajiv ,  LI, Junyi ,  PARIZHSKY, Vladimir

IPC分类号： H04J11/00 ,  H04J9/00 ,  H04L5/04 ,  H04Q7/00

CPC分类号： H04L27/2602 ,  H04L5/0042

摘要： More efficient utilization of available bandwidth is implemented in an OFDM wireless communication system. The partitions of bandwidth may be of different sizes and may be different from the original system design parameters. Basic system structure such as the number of tones used and the number of OFDM symbol times in a slot is maintained throughout the system. Bandwidth is varied by adjusting the inter-tone spacing or bandwidth associated with a single tone. As the inter-tone spacing is increased, the OFDM symbol transmission time is decreased following an inverse proportional relationship. A first base station transmitter transmits signals on a first number of tones distributed uniformly in a first frequency band (1202), and a second base station transmitter transmits signals on a second number of tones distributed uniformly in a second frequency band which is wider than the first frequency band, the second number of tones being the same as the first number of tones (1204). The first and second base stations support handoffs of mobile nodes between to each other (1216).

公开(公告)号：EP1807953A2

公开(公告)日：2007-07-18

申请号：EP05824371.8

申请日：2005-10-14

申请人： Flarion Technologies, INC.

发明人： LAROIA, Rajiv ,  PARIZHSKY, Vladimir ,  LI, Junyi ,  UPPALA, Sathyadev, Venkata

IPC分类号： H04J3/06

CPC分类号： H04L27/2613 ,  H04L5/0053 ,  H04L7/04

摘要： Improved beacon signaling methods are described. Beacon signals are transmitted on the same tone in at least two consecutive symbol periods facilitating accurate energy measurements over a symbol period even if timing synchronization with the transmitter is not maintained. A low power wideband signal is also combined with the beacon signal to facilitate channel estimation and other operation such as timing synchronization operations.

公开(公告)号：EP1736012A1

公开(公告)日：2006-12-27

申请号：EP04796050.5

申请日：2004-10-15

申请人： Flarion Technologies, Inc.

发明人： LAROIA, Rajiv ,  LI, Junyi ,  RICHARDSON, Tom

IPC分类号： H04Q7/20

CPC分类号： H04L27/2602 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04W16/12 ,  H04W16/24 ,  H04W24/02 ,  H04W48/12 ,  H04W52/143 ,  H04W52/322 ,  H04W52/386 ,  H04W92/20

摘要： Methods and apparatus for implementing a multi-carrier communications system are described. Various approaches to a phased system deployment and system configurations resulting from different levels of deployment are described. In addition mobile node and methods of operating mobile nodes in communications systems that may have different levels of deployment in different cells are described.

公开(公告)号：EP1366591B1

公开(公告)日：2006-11-15

申请号：EP02706481.5

申请日：2002-03-04

申请人： Flarion Technologies, INC.

发明人： LAROIA, Rajiv ,  LI, Junyi ,  PARIZHSKY, Vladimir

IPC分类号： H04L7/033

CPC分类号： H04W56/0045 ,  H04L5/023 ,  H04L7/0334 ,  H04L27/2646 ,  H04L27/2662 ,  H04W56/0005

摘要： Symbol timing synchronization in OFDM communication systems where multiple wireless terminals communicate with a single base station is described. Base station transmitter and receiver symbol timing is fixed. Each wireless terminal operates to independently adjust its transmitter timing. Transmitter timing synchronization at the wireless terminal is slaved to the terminal's receiver timing synchronization. each wireless terminal first corrects its receiver symbol timing based on a signal received from the base station. The wireless terminal then adjusts its transmitter symbol timing as a function of its receiver symbol timing. When the receiver symbol timing is to be advanced or delayed by some amount, the transmitter symbol timing is also advanced or delayed, respectively, by the same, or substantially the same, amount. Symbol timing adjustment can be made by adding or deleting digital samples from the first or last symbol in a dwell.

公开(公告)号：EP1595353A4

公开(公告)日：2006-10-18

申请号：EP04705282

申请日：2004-01-26

申请人： FLARION TECHNOLOGIES INC

发明人： O'NEILL ALAN ,  CORSON SCOTT M ,  TSIRTSIS GEORGE ,  PARK VINCENT

IPC分类号： G11C7/00 ,  H04B7/00 ,  H04L20060101 ,  H04L12/28 ,  H04L12/56 ,  H04W8/08 ,  H04W36/00 ,  H04W36/08 ,  H04W80/04 ,  H04W88/00 ,  H04W92/12 ,  H04W92/20 ,  H04Q7/20

CPC分类号： H04W36/0033 ,  H04W8/08 ,  H04W36/0011 ,  H04W36/08 ,  H04W80/04 ,  H04W88/005 ,  H04W92/12 ,  H04W92/20

摘要： Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g., mobile devices, are described. Various features are directed to a mobile node controlling the transfer of state from a first access node to a second access node during a handoff operation thereby eliminating any need for state transfer messages to be transmitted between the second access node and the first access node during handoff. Other features of the invention are directed to the use of a core network node to store state information. State information stored in the core node can be accessed and used by access nodes in cases where a mobile node does not send a state transfer message during a handoff, e.g., because communication with the first access node is lost or because such messages are not supported.

公开(公告)号：EP1597828A4

公开(公告)日：2006-05-24

申请号：EP04715077

申请日：2004-02-26

申请人： FLARION TECHNOLOGIES INC

发明人： RICHARDSON TOM

IPC分类号： H03M13/27 ,  H03M13/11

CPC分类号： H03M13/116 ,  H03M13/1102 ,  H03M13/6356 ,  H03M13/6362

摘要： Methods and apparatus of the present invention can be used to implement a communications system wherein different devices using the same LDPC code can be implemented using different levels of parallelism. The use of a novel class of LDPC codes makes such differences in parallelism possible. Use of a factorable permuter (706) in various embodiments of the invention make LDPC devices with different levels of parallelism in the encoder and decoder relatively easy to implement when using codes in the class of LDPC codes discussed herein. The factorable permuter (706) may be implemented as a controllable multi-stage switching device which performs none, one, or multiple sequential reordering operations on a Z element vector passed between memory (702) and a Z element vector processor (710), with the switching of individual vectors being controlled (718) in accordance with the graph structure (720) of the code being implemented.