公开(公告)号：US20100287453A1

公开(公告)日：2010-11-11

申请号：US12696141

申请日：2010-01-29

申请人： Kumar BALACHANDRAN ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

发明人： Kumar BALACHANDRAN ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

IPC分类号： H03M13/27 ,  G06F11/10

CPC分类号： H03M13/235 ,  H03M13/2957 ,  H03M13/413 ,  H03M13/618 ,  H03M13/6356 ,  H03M13/6362 ,  H03M13/6544

摘要： A convolutional encoder (50) comprises an expurgation unit (22) and a first component convolutional encoder section (24). A convolutional turbo encoder (20) comprises an expurgation unit (22); a first component convolutional encoder section (24); a second component convolutional encoder section (26); and an interleaver (28). For both the convolutional encoder (50) and the expurgating convolutional turbo encoder (20) the expurgation unit (22) 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.

摘要翻译： 卷积编码器（50）包括消除单元（22）和第一组件卷积编码器部分（24）。 卷积涡轮编码器（20）包括消除单元（22）; 第一组件卷积编码器部分（24）; 第二组件卷积编码器部分（26）; 和交织器（28）。 对于卷积编码器（50）和剥离卷积涡轮编码器（20），消除单元（22）在输入位序列的选定位位置处插入预定值，从而提供一个被消除的输入位序列。 较低速率的卷积码通过较高的速率代码获得。

公开(公告)号：US08726137B2

公开(公告)日：2014-05-13

申请号：US12696141

申请日：2010-01-29

申请人： Kumar Balachandran ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Tripura Ramesh

发明人： Kumar Balachandran ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H03M13/03

CPC分类号： H03M13/235 ,  H03M13/2957 ,  H03M13/413 ,  H03M13/618 ,  H03M13/6356 ,  H03M13/6362 ,  H03M13/6544

摘要： A convolutional encoder (50) comprises an expurgation unit (22) and a first component convolutional encoder section (24). A convolutional turbo encoder (20) comprises an expurgation unit (22); a first component convolutional encoder section (24); a second component convolutional encoder section (26); and an interleaver (28). For both the convolutional encoder (50) and the expurgating convolutional turbo encoder (20) the expurgation unit (22) 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.

摘要翻译： 卷积编码器（50）包括消除单元（22）和第一组件卷积编码器部分（24）。 卷积涡轮编码器（20）包括消除单元（22）; 第一组件卷积编码器部分（24）; 第二组件卷积编码器部分（26）; 和交织器（28）。 对于卷积编码器（50）和剥离卷积涡轮编码器（20），消除单元（22）在输入位序列的选定位位置处插入预定值，从而提供一个被消除的输入位序列。 较低速率的卷积码通过较高的速率代码获得。

公开(公告)号：US06516196B1

公开(公告)日：2003-02-04

申请号：US09288364

申请日：1999-04-08

申请人： Tsao-Tsen Chen ,  Wen-Yi Kuo ,  Martin Howard Meyers

发明人： Tsao-Tsen Chen ,  Wen-Yi Kuo ,  Martin Howard Meyers

IPC分类号： H04Q720

CPC分类号： H04W28/22 ,  H04W36/18 ,  H04W72/0453

摘要： The invention provides a novel methodology for increasing the performance of CDMA systems with packet data services by accommodating a variety of users with different rates. The invention operates to increase the spectrum efficiency of a wireless system by using an optimal transmission set of base transceiver stations and assigning proper data rates to efficiently utilize the radio resources. In particular, the invention operates to decrease interference so that the quality of data transmission in CDMA systems is advantageously maintained. Moreover, the invention operates to increase the allocation of bandwidth, particularly for high-speed data services. The invention provides a methodology to evaluate the data rates of different combinations of BTSs that may be in connection with a particular mobile station (MS), allocate an appropriate data rate for the MS and make allocation of system resources more efficient in a multi-user environment.

摘要翻译： 本发明提供了一种用于通过容纳具有不同速率的各种用户来增加具有分组数据服务的CDMA系统的性能的新颖方法。 本发明通过使用基站收发台的最佳传输集合并分配适当的数据速率来有效利用无线电资源来提高无线系统的频谱效率。 具体地，本发明用于减少干扰，从而有利地维持CDMA系统中数据传输的质量。 此外，本发明操作以增加带宽的分配，特别是对于高速数据业务。 本发明提供了一种用于评估可能与特定移动站（MS）相关联的BTS的不同组合的数据速率的方法，为MS分配适当的数据速率并使系统资源的分配在多用户中更有效 环境。

公开(公告)号：US20100169747A1

公开(公告)日：2010-07-01

申请号：US12621604

申请日：2009-11-19

申请人： Tsao-Tsen Chen ,  Per Ernstrom ,  Sten Ingemar Sjoberg ,  Kai Yu

发明人： Tsao-Tsen Chen ,  Per Ernstrom ,  Sten Ingemar Sjoberg ,  Kai Yu

IPC分类号： H03M13/23 ,  H03M13/07 ,  G06F11/10

CPC分类号： H03M13/235 ,  H03M13/036 ,  H03M13/413 ,  H03M13/635 ,  H03M13/6362 ,  H03M13/6375

摘要： Method and apparatus for generating a set of generator polynomials for use as a tail biting convolutional code to operate on data transmitted over a channel comprises: (0) specifying a constraint and a low code rate for a tail biting convolutional code, where the low rate code is lower than 1/n (n being an integer greater than 4); (1) selecting valid combinations of generator polynomials to include in a pool of potential codes, each valid combination being a potential code of the low rate code; (2) determining first lines of a weight spectrum for each potential code in the pool and including potential codes of the pool having best first lines in a candidate set; (3) determining best codes of the candidate set based on the first L number of lines in the weight spectrum; (4) selecting an optimum code(s) from the best codes; and (5) configuring a circuit(s) of a data transceiver to implement the optimum code(s).

摘要翻译： 用于生成一组生成多项式的方法和装置，其用作尾部卷积卷积码以对通过信道发送的数据进行操作包括：（0）为尾部卷积卷积码指定约束和低码率，其中低速率 代码低于1 / n（n是大于4的整数）; （1）选择生成多项式的有效组合以包括在潜在代码池中，每个有效组合是低速率代码的潜在代码; （2）确定所述池中每个潜在代码的权重谱的第一行，并且包括在候选集合中具有最佳第一行的所述池的潜在代码; （3）基于权重谱中的第一L个行数确定候选集合的最佳代码; （4）从最佳代码中选择最佳代码; 和（5）配置数据收发器的电路以实现最佳代码。

公开(公告)号：US07369494B2

公开(公告)日：2008-05-06

申请号：US10665611

申请日：2003-09-19

申请人： Tsao-Tsen Chen ,  Gang Li ,  Ming Lu ,  Martin H. Meyers

发明人： Tsao-Tsen Chen ,  Gang Li ,  Ming Lu ,  Martin H. Meyers

IPC分类号： H04L1/00

CPC分类号： H04W28/18

摘要： The invention operates to determine a measure of one or more input data parameters, such as input data rate and input data buffer fill at the beginning of a data burst. The invention then proceeds to the selection of an operating data rate for the data burst as a function of the input data parameter measures. In a further step, the invention proceeds to a selection of a duration for the data burst as a function of the selected operating data rate and an end-of-burst data residue parameter.

摘要翻译： 本发明用于确定一个或多个输入数据参数的度量，例如在数据突发的开始处的输入数据速率和输入数据缓冲器填充。 然后，本发明继续选择作为输入数据参数测量的函数的数据突发的操作数据速率。 在另一步骤中，本发明继续选择作为选择的操作数据速率和爆发结束数据残差参数的函数的数据突发的持续时间。

公开(公告)号：US09635595B2

公开(公告)日：2017-04-25

申请号：US14233807

申请日：2011-07-25

申请人： Tsao-Tsen Chen ,  Lars Klockar ,  Chrysostomos Koutsimanis

发明人： Tsao-Tsen Chen ,  Lars Klockar ,  Chrysostomos Koutsimanis

IPC分类号： H04W84/04 ,  H04W36/04 ,  H04W36/22 ,  H04W36/30 ,  H04W36/00

CPC分类号： H04W36/30 ,  H04W36/0083 ,  H04W36/04 ,  H04W36/22 ,  H04W84/047

摘要： Methods and network nodes (110, 112), serving a user equipment (120), for deciding if a handover request of the user equipment (120) is to be sent to a candidate target network node (130-1, 130-2, 130-3). The methods comprise acquire (603) data-rate performance of a wireless link between the network nodes (110, 112) and the user equipment (120). The data-rate performance is compared (606) with a data-rate performance threshold value. If the acquired data-rate performance is lower than the data-rate performance threshold value, it is decided (607) to send the handover request of the user equipment (120) to the candidate target network node (130-1, 130-2, 130-3).

公开(公告)号：US20140349647A1

公开(公告)日：2014-11-27

申请号：US14233807

申请日：2011-07-25

申请人： Tsao-Tsen Chen ,  Lars Klockar ,  Chrysostomos Koutsimanis

发明人： Tsao-Tsen Chen ,  Lars Klockar ,  Chrysostomos Koutsimanis

IPC分类号： H04W36/30 ,  H04W36/00

CPC分类号： H04W36/30 ,  H04W36/0083 ,  H04W36/04 ,  H04W36/22 ,  H04W84/047

摘要： Methods and network nodes (110, 112), serving a user equipment (120), for deciding if a handover request of the user equipment (120) is to be sent to a candidate target network node (130-1, 130-2, 130-3). The methods comprise acquire (603) data-rate performance of a wireless link between the network nodes (110, 112) and the user equipment (120). The data-rate performance is compared (606) with a data-rate performance threshold value. If the acquired data-rate performance is lower than the data-rate performance threshold value, it is decided (607) to send the handover request of the user equipment (120) to the candidate target network node (130-1, 130-2, 130-3).

摘要翻译： 方法和网络节点（110,112）为用户设备（120）提供服务，用于确定用户设备（120）的切换请求是否被发送到候选目标网络节点（130-1,130-2， 130-3）。 这些方法包括获取（603）在网络节点（110,112）和用户设备（120）之间的无线链路的数据速率性能。 将数据速率性能（606）与数据速率性能阈值进行比较。 如果获取的数据速率性能低于数据速率性能阈值，则决定（607）将用户设备（120）的切换请求发送到候选目标网络节点（130-1,130-2 ，130-3）。

公开(公告)号：US20050063315A1

公开(公告)日：2005-03-24

申请号：US10665611

申请日：2003-09-19

申请人： Tsao-Tsen Chen ,  Gang Li ,  Ming Lu ,  Martin Meyers

发明人： Tsao-Tsen Chen ,  Gang Li ,  Ming Lu ,  Martin Meyers

IPC分类号： H04L12/56 ,  H04Q7/00

CPC分类号： H04W28/18

摘要： ntion is directed to the management of data burst requests. In iethod of the invention operates to determine a measure of one or parameters, which in an advantageous embodiment are the input z amount of data available in the input data buffer at the beginning t. The invention then proceeds to the selection of an operating data burst as a function of the input data parameter measures. In an nbodiment, the operating data rate is determined by computing the red data rate as a function of the input data rate and the data content fer at the beginning of the data burst, with the operating data rate lowest supported system data rate that is equal to or greater than the ed data rate. In a further step, the invention proceeds to a selection r the data burst from the burst durations supported by the wireless ction of the selected operating data rate and an end-of-burst data er. Advantageously, the system duration is selected that that, when selected operating data rate, provides a minimum end-of-burst data

公开(公告)号：US06920598B2

公开(公告)日：2005-07-19

申请号：US09861740

申请日：2001-05-21

申请人： Tsao-Tsen Chen ,  Wen-Yi Kuo ,  Gang Li ,  Mjing Lu ,  Martin Meyers

发明人： Tsao-Tsen Chen ,  Wen-Yi Kuo ,  Gang Li ,  Mjing Lu ,  Martin Meyers

IPC分类号： H04L12/28 ,  H04L1/16 ,  H04L1/18 ,  G08C25/02

CPC分类号： H04L1/1858 ,  H04L1/1671 ,  H04L1/1809

摘要： In a system of communication, a sending node sends a message to a receiving node, which NAKs unsuccessful transmissions. The sending node screens the NAKs to determine if they were sent before the receiver could receive previous transmissions of the same data NAKed. One screening technique is based on an estimated round trip time of a message. Another alternate technique looks a flag in the NAK that synchronizes the sender and the receiver.

摘要翻译： 在通信系统中，发送节点向接收节点发送消息，NAK不成功传输。 发送节点屏蔽NAK以确定它们是否在接收机可以接收到相同数据NAKed的先前传输之前被发送。 一种筛选技术是基于消息的估计往返时间。 另一种替代技术在NAK中看到一个标志来同步发送者和接收者。

公开(公告)号：US06697348B1

公开(公告)日：2004-02-24

申请号：US09288587

申请日：1999-04-08

申请人： Tsao-Tsen Chen ,  Wen-Yi Kuo

发明人： Tsao-Tsen Chen ,  Wen-Yi Kuo

IPC分类号： H04J300

CPC分类号： H04W72/085

摘要： The invention provides a novel burst duration assignment process that increases the performance and improves the throughput of communication systems. In particular, the invention provides an optimal burst duration assignment methodology such that resources are efficiently utilized and maximized in a communication system such as a code division multiple access (CDMA) system. According to the invention, burst duration is assigned based on channel fading fluctuation and user mobility in the communication system. In general, shorter burst duration is assigned to users with higher fading fluctuation and high mobility. Longer burst duration is assigned to users with lower fading fluctuation and low mobility. In a particular embodiment of the invention, the burst assignment is based on a function of duration versus fluctuation.

摘要翻译： 本发明提供了一种新的突发持续时间分配过程，其增加了通信系统的性能并提高了通信系统的吞吐量。 特别地，本发明提供了一种最佳突发持续时间分配方法，使得在诸如码分多址（CDMA）系统的通信系统中资源得到有效利用和最大化。 根据本发明，基于通信系统中的信道衰落波动和用户移动性来分配突发持续时间。 通常，较短的突发持续时间被分配给具有较高衰落波动和高移动性的用户。 更长的突发持续时间被分配给具有较低衰落波动和低移动性的用户。 在本发明的特定实施例中，突发分配基于持续时间与波动的函数。