公开(公告)号：US20060104115A1

公开(公告)日：2006-05-18

申请号：US10993034

申请日：2004-11-18

申请人： Dexter Chun ,  Ajit Patil ,  Ian Huang ,  Jason Chan ,  Timothy Gold

发明人： Dexter Chun ,  Ajit Patil ,  Ian Huang ,  Jason Chan ,  Timothy Gold

IPC分类号： G11C16/04

CPC分类号： G11C29/028 ,  G06F9/4403 ,  G06F9/44505 ,  G06F11/1068 ,  G11C7/1006 ,  G11C7/1045 ,  G11C7/22 ,  G11C16/04 ,  G11C16/0483 ,  G11C16/26 ,  G11C16/32 ,  G11C29/42 ,  G11C29/50 ,  G11C29/50012 ,  G11C2216/14

摘要： Techniques for quickly and reliably accessing a memory device (e.g., a NAND Flash memory) with adaptive interface timing are described. For memory access with adaptive interface timing, the NAND Flash memory is accessed at an initial memory access rate, which may be the rate predicted to achieve reliable memory access. Error correction coding (ECC), which is often employed for NAND Flash memory, is then used to ensure reliable access of the NAND Flash. For a read operation, one page of data is read at a time from the NAND Flash memory, and the ECC determines whether the page read from the NAND Flash memory contains any errors. If errors are encountered, then a slower memory access rate is selected, and the page with error is read again from the NAND Flash memory at the new rate. The techniques may be used to write data to the NAND Flash memory.

公开(公告)号：US20070192610A1

公开(公告)日：2007-08-16

申请号：US11351966

申请日：2006-02-10

申请人： Dexter Chun ,  Ajit Patil ,  Cuneyt Fitoz ,  Dwight Gordon ,  Yu-Hsiang Huang ,  Oliver Michaelis

发明人： Dexter Chun ,  Ajit Patil ,  Cuneyt Fitoz ,  Dwight Gordon ,  Yu-Hsiang Huang ,  Oliver Michaelis

IPC分类号： H04L9/00

CPC分类号： G06F21/64 ,  G06F21/575

摘要： Techniques to securely boot up an electronics device (e.g., a cellular phone) from an external storage device are described. Secure data (e.g., a hash digest, a signature, a cryptographic key, and so on) is initially retrieved from a non-writable area of an external memory device (e.g., an one-time programmable (OTP) area of a NAND Flash device). A first program (e.g., a boot program) is retrieved from a writable or main area of the external memory device and authenticated based on the secure data. The first program is enabled for execution if authenticated. A second program may be retrieved from the main area of the external memory device and authenticated based on the secure data. The second program is enabled for execution if authenticated. Additional programs may be retrieved and authenticated. Each program may be authenticated using a secure hash function, a digital signature, and/or some other cryptographic technique.

摘要翻译： 描述了从外部存储设备安全地引导电子设备（例如，蜂窝电话）的技术。 最初从外部存储器件（例如，NAND闪存的一次可编程（OTP））区域的不可写区域检索安全数据（例如，散列摘要，签名，加密密钥等） 设备）。 从外部存储器件的可写或主区域检索第一程序（例如，引导程序），并基于安全数据进行认证。 如果通过验证，第一个程序启用执行。 可以从外部存储设备的主区域检索第二程序，并且基于安全数据进行认证。 如果通过验证，第二个程序启用执行。 可以检索和认证附加程序。 可以使用安全散列函数，数字签名和/或一些其他加密技术来对每个程序进行认证。

公开(公告)号：US07269181B2

公开(公告)日：2007-09-11

申请号：US09826224

申请日：2001-04-04

申请人： Dexter Chun ,  Kou-Chun Lee ,  Robert Knight ,  Ravi Palakodety

发明人： Dexter Chun ,  Kou-Chun Lee ,  Robert Knight ,  Ravi Palakodety

IPC分类号： H04M1/00 ,  H04B7/00

CPC分类号： H04W24/04 ,  H04W88/12

摘要： A base station controller system comprises a high data rate distributed switching fabric providing flexible access to call processing resource pools. The arrangement permits a system controller to selectively assign specific resources depending on call type based on configuring the distributed switching fabric. The transport links comprising the distributed switching fabric provide redundant access to each of the resource pools, greatly reducing the portion of overall call processing capability lost with a single failure. Preferably, the distributed switching fabric comprises a central ATM switch and a number of distributed ATM switches interconnecting the resource pools to the central switching resource. The system may adopt a rack arrangement wherein a processing subrack includes the mix of different processing resources necessary to support substantially all call flow processing for one or more types of calls. The system's call capacity is thus easily scalable based on adding additional processing subracks.

摘要翻译： 基站控制器系统包括提供对呼叫处理资源池的灵活接入的高数据速率分布式交换结构。 该配置允许系统控制器基于配置分布式交换结构来根据呼叫类型选择性地分配特定资源。 包括分布式交换结构的传输链路提供对每个资源池的冗余访问，大大减少了单个故障损失的整体呼叫处理能力的部分。 优选地，分布式交换结构包括中央ATM交换机和将资源池互连到中央交换资源的多个分散式ATM交换机。 系统可以采用机架布置，其中处理框包括用于支持一种或多种类型呼叫的基本上所有呼叫流处理所必需的不同处理资源的混合。 因此，系统的呼叫容量可以通过添加额外的处理支架来轻松扩展。

公开(公告)号：US07092409B2

公开(公告)日：2006-08-15

申请号：US09814658

申请日：2001-03-21

申请人： Dexter Chun ,  Steve Hicks ,  Bob Knight ,  KC Lee ,  Ravi Palakodety ,  Dave Walker ,  Jun Zhang

发明人： Dexter Chun ,  Steve Hicks ,  Bob Knight ,  KC Lee ,  Ravi Palakodety ,  Dave Walker ,  Jun Zhang

IPC分类号： H04L12/42

CPC分类号： H04B7/2693 ,  H04J3/0685 ,  H04J3/0688

摘要： A timing network for a wireless communication network includes first and second Timing Unit Board (TUB) and processor boards for processing speech channels of the radio network, each processor board having a local timer that is slave to “PSTN time” from a Public Switch Telephone Network (PSTN). The first and second TUB each alternately transmits a timing cell containing time information to each processor board over a transport network. Each processor board realigns its local timer with the time information contained in a received timing cell whenever its local timer drifts from the time information contained in the received timing cell by a predetermined time offset. When one of the TUBs fails to transmit timing cells to the processor boards or transmits timing cells containing erroneous time information, the processor boards rely on the remaining TUB for timing cells to realign their local timers.

公开(公告)号：US20050114725A1

公开(公告)日：2005-05-26

申请号：US10722350

申请日：2003-11-25

申请人： Jagrut Patel ,  Dexter Chun ,  Gregory Bullard ,  Raghu Sankuratri ,  Rajeev Prabhakaran ,  Sanat Kapoor

发明人： Jagrut Patel ,  Dexter Chun ,  Gregory Bullard ,  Raghu Sankuratri ,  Rajeev Prabhakaran ,  Sanat Kapoor

IPC分类号： G01R35/00 ,  G06F1/14 ,  G06F1/04

CPC分类号： G01R35/005

摘要： Systems and techniques are disclosed relating to calibrating an integrated circuit to an electronic component. The systems and techniques include an integrated circuit configured to generate a system clock and an external clock having a programmable delay from the system clock. The integrated circuit may also be configured to provide the external clock to the electronic component to support communications therewith, communicate with the electronic component, and calibrate the external clock delay as a function of the communications.

摘要翻译： 公开了关于将集成电路校准到电子部件的系统和技术。 该系统和技术包括被配置为产生系统时钟的集成电路和具有来自系统时钟的可编程延迟的外部时钟。 集成电路还可以被配置为向电子部件提供外部时钟以支持与其通信，与电子部件通信，并且根据通信校准外部时钟延迟。

公开(公告)号：US06898212B1

公开(公告)日：2005-05-24

申请号：US09713778

申请日：2000-11-14

申请人： Dexter Chun ,  Manoj Deshpande ,  Steve Hicks ,  Bob Knight ,  KC Lee ,  Ravi Palakodety ,  Ramesh Ramaswamy ,  Gustavo Serena ,  Dave Walker ,  Jun Zhang

发明人： Dexter Chun ,  Manoj Deshpande ,  Steve Hicks ,  Bob Knight ,  KC Lee ,  Ravi Palakodety ,  Ramesh Ramaswamy ,  Gustavo Serena ,  Dave Walker ,  Jun Zhang

IPC分类号： H04B7/26 ,  H04J3/06

CPC分类号： H04B7/2628

摘要： A Base Station Controller (BSC) that reduces the occurrence of audible noise in a Code Division Multiple Access (CDMA) radio network is provided. The BSC according to one embodiment of the present invention comprises a Media Stream Board (MSB) for compressing groups of 160 PCM speech samples from a Public Switch Telephone Network (PSTN) into vocoded frames, and a Special Purpose Board (SPB) for reformatting the vocoded frames from the MSB into over-the-air CDMA vocoded frames. The MSB and SPB each have a local timer that is slave to “PSTN time”. The BSC further comprises a Timing Unit Board (TUB) connected to a GPS receiver. The TUB receives “GPS time” from the GPS receiver. The TUB generates timing cells, each containing time-of-day information according to “GPS time”. The TUB distributes the timing cells to the MSB and the SPB over an Asynchronous Transfer Mode (ATM) network. The MSB and SPB use the received timing cells to compare their local timer, which tracks “PSTN time”, to “GPS time”. The MSB and the SPB realign their local timer with “GPS time” whenever their local timer drifts from “GPS time” outside of a predetermined time window.

摘要翻译： 提供了一种在码分多址（CDMA）无线电网络中减少可听噪声的发生的基站控制器（BSC）。 根据本发明的一个实施例的BSC包括用于将来自公共交换电话网（PSTN）的160个PCM语音样本的组压缩为声码帧的媒体流板（MSB），以及专用板（SPB），用于重新格式化 从MSB到无线CDMA语音码帧的声码帧。 MSB和SPB每个都有一个本地定时器，从站到“PSTN时间”。 BSC还包括连接到GPS接收机的定时单元板（TUB）。 TUB从GPS接收机接收“GPS时间”。 TUB产生定时单元，每个单元包含根据“GPS时间”的日期信息。 TUB通过异步传输模式（ATM）网络将定时单元分配给MSB和SPB。 MSB和SPB使用接收到的定时单元将其“PSTN时间”跟踪的本地定时器与“GPS时间”进行比较。 当本地定时器从预定时间窗口之外的“GPS时间”漂移时，MSB和SPB将其本地定时器重新对准“GPS时间”。