公开(公告)号：US07054284B2

公开(公告)日：2006-05-30

申请号：US09339342

申请日：1999-06-23

Applicant: Yu-Cheun Jou ,  Edward G. Tiedemann, Jr.

Inventor： Yu-Cheun Jou ,  Edward G. Tiedemann, Jr.

IPC: H04Q7/00

CPC classification number: H04W52/282 ,  H04B17/382 ,  H04L1/20 ,  H04L1/201 ,  H04W52/288

Abstract: The present invention is a novel and improved method and apparatus for supervising a potentially gated channel in a wireless communication system. The first method is an extension of the method used in IS-95 with empty frames simply ignored, but with potentially different thresholds. The mobile station maintains a counter of consecutive bad frames, COUNT1, and a counter of consecutive good frames, COUNT2. COUNT1 and COUNT2 are set to zero at the beginning of a call. For each frame received, the mobile station determines if it is a good frame, a bad frame, or an empty frame. If the received frame is a good frame, COUNT1 is reset to zero and COUNT2 is incremented by 1. If the received frame is a bad frame, COUNT1 is incremented by one and COUNT2 is reset to zero. If the received frame is an empty frame, COUNT1 and COUNT2 are unchanged. If COUNT1 reaches a threshold value, TH1, the mobile station shall disable its transmitter. Thereafter, if COUNT2 reaches a threshold value, TH2, the mobile station shall re-enable its transmitter. The mobile station resets its fade timer to X seconds whenever COUNT2 is greater than or equal to TH3.

Abstract translation: 本发明是一种用于在无线通信系统中监视潜在门控信道的新颖和改进的方法和装置。 第一种方法是在IS-95中使用的方法的扩展，其中空帧仅被忽略，但具有潜在的不同阈值。 移动台维持连续的不良帧COUNT 1的计数器和连续的良好帧的计数器COUNT 2。 在调用开始时，COUNT 1和COUNT 2设置为零。 对于接收到的每个帧，移动台确定它是否是良好帧，坏帧或空帧。 如果接收到的帧是一个好的帧，则将COUNT 1复位为零，并且COUNT 2递增1.如果接收到的帧是坏帧，则COUNT 1增加1，并且COUNT 2被重置为零。 如果接收到的帧是空帧，则COUNT 1和COUNT 2不变。 如果COUNT 1达到阈值TH1，则移动台将禁用其发射机。 此后，如果COUNT 2达到阈值TH2，则移动台应重新使能其发射机。 当COUNT 2大于或等于TH3时，移动台将其衰落定时器复位为X秒。

公开(公告)号：US20050286459A1

公开(公告)日：2005-12-29

申请号：US11142353

申请日：2005-06-02

Applicant: Hee-Jin Roh ,  Min-Goo Kim

Inventor： Hee-Jin Roh ,  Min-Goo Kim

IPC: H04B7/26 ,  H04J3/14 ,  H04L1/00 ,  H04L1/20 ,  H04B7/212

CPC classification number: H04L1/0054 ,  H04L1/0061 ,  H04L1/0068 ,  H04L1/0072 ,  H04L1/20 ,  H04L1/201

Abstract: An apparatus and a method are provided for improving reception reliability for control channels by detecting time division multiple (TDM) frames transmitted through the control channels in a TDM mobile communication system. The apparatus and method include receiving the frame through the forward control channel and performing a cyclic redundancy checking (CRC) with respect to the frame, thereby outputting a first error detection bit, measuring reception power for the frame, calculating a first path metric when decoding a channel of the frame, estimating a second path metric by using the first path metric and the reception power, and outputting a second error detection bit by comparing the second path metric with a predetermined threshold value, and creating and outputting a frame quality bit for detecting validity of the frame based on the first and second error detection bits.

Abstract translation: 提供了一种通过检测通过TDM移动通信系统中的控制信道发送的时分复用（TDM）帧来提高控制信道的接收可靠性的装置和方法。 该装置和方法包括：通过前向控制信道接收帧，对该帧执行循环冗余校验（CRC），从而输出测量该帧的接收功率的第一错误检测比特，当解码时计算第一路径量度 帧的信道，通过使用第一路径度量和接收功率来估计第二路径量度，并且通过将第二路径度量与预定阈值进行比较来输出第二错误检测比特，并且创建并输出帧质量比特， 基于第一和第二错误检测位来检测帧的有效性。

公开(公告)号：US20050235190A1

公开(公告)日：2005-10-20

申请号：US11152902

申请日：2005-06-15

Applicant: Shunji Miyazaki ,  Kazuhisa Obuchi ,  Tetsuya Yano

Inventor： Shunji Miyazaki ,  Kazuhisa Obuchi ,  Tetsuya Yano

IPC: H04L1/18 ,  H04B14/04 ,  G08C25/02

CPC classification number: H04L1/1812 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/201

Abstract: A receiver receives data transmitted from a transmitter. The data is stored in a buffer, and a reliability value of the data is computed by a computing unit. A determining unit determines reliability of the data by comparing a reliability value of existing data in the buffer and a reliability value of the data. When the reliability value of the data is higher than a predetermined value, the existing data is combined with the data. Then, an error correcting unit performs error correcting on combined data obtained, and outputs decoded bits. If the combined data includes many errors, retransmission of the data is requested to the transmitter. When the reliability value of the data is lower than the predetermined value, retransmission of data is directly requested without combining the data with the existing data.

Abstract translation: 接收机接收从发射机发送的数据。 数据存储在缓冲器中，数据的可靠性值由计算单元计算。 确定单元通过比较缓冲器中现有数据的可靠性值和数据的可靠性值来确定数据的可靠性。 当数据的可靠性值高于预定值时，将现有数据与数据组合。 然后，错误校正单元对获得的组合数据执行纠错，并输出解码的比特。 如果组合数据包含许多错误，则向发射机请求数据的重传。 当数据的可靠性值低于预定值时，直接请求重发数据而不将数据与现有数据进行组合。

公开(公告)号：US06804530B2

公开(公告)日：2004-10-12

申请号：US09751462

申请日：2000-12-29

Applicant: Ashvin H. Chheda ,  Geng Wu

Inventor： Ashvin H. Chheda ,  Geng Wu

IPC: H04B700

CPC classification number: H04W52/288 ,  H04L1/20 ,  H04L1/201 ,  H04W52/16 ,  H04W52/44

Abstract: A base station controller includes circuitry for determining whether a transmitter is transmitting in a DTX mode or operation for a supplemental channel in a CDMA network. The invention includes the steps of determining frame quality metrics for data received on a fundamental and a supplemental channel. If the frame quality metric is good, meaning that the number of errors is below a defined threshold, on the supplemental channel, then the mobile station is not, by definition, within a DTX mode of operation. However, if each of the base stations that are on the active list of base stations for the mobile station report that the mobile station frame quality metric is not below or within a specified threshold, then the base station performs a calculation to determine whether the mobile station is in a DTX mode of operation or is transmitting a null set. Specifically, the base station calculates a signal to noise ratio for the pilot channel as well as for the supplemental channel and compares or determines a ratio of these two calculations. If the ratio is within or below a specified threshold, then an erasure has occurred. If not, then the mobile station did transmit in a DTX mode of operation.

Abstract translation: 基站控制器包括用于确定发射机是否以DTX模式进行传输或用于CDMA网络中的补充信道的操作的电路。 本发明包括确定在基本信道和补充信道上接收的数据的帧质量度量的步骤。 如果帧质量度量好，意味着错误数量低于定义的阈值，则在补充信道上，则移动台根据定义不在DTX操作模式中。 然而，如果位于移动站的基站的活动列表上的每个基站报告移动站帧质量度量不在或低于指定阈值内，则基站执行计算以确定移动站 站处于DTX操作模式或正在发送空集。 具体地，基站计算导频信道以及补充信道的信噪比，并比较或确定这两个计算的比率。 如果比率在指定阈值内或低于指定阈值，则发生擦除。 如果没有，则移动台确实以DTX操作模式发送。

公开(公告)号：US06804218B2

公开(公告)日：2004-10-12

申请号：US09730147

申请日：2000-12-04

Applicant: Khaled H. El-Maleh ,  Eddie-Lun Tik Choy ,  Arasanipalai K. Ananthapadmanabhan ,  Andrew P. DeJaco ,  Pengjun Huang

Inventor： Khaled H. El-Maleh ,  Eddie-Lun Tik Choy ,  Arasanipalai K. Ananthapadmanabhan ,  Andrew P. DeJaco ,  Pengjun Huang

IPC: H04B7216

CPC classification number: H04L1/08 ,  H04L1/0046 ,  H04L1/201

Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.

Abstract translation: 一种用于在可变速率通信系统接收机中检测速率确定算法错误的系统和方法。 所公开的实施例防止速率确定算法错误引起可听见的伪影，例如吱吱声或嘟嘟声。 所公开的系统和方法检测具有错误确定的数据速率的帧，并执行帧擦除处理和/或存储器状态清理，以防止跨多个帧的失真传播。 通过检查非法速率转换，保留位，验证未使用的过滤器类型位组合以及分析固定代码簿增益和线性预测系数增益之间的关系来检测具有不正确确定的数据速率的帧。

公开(公告)号：US06725054B1

公开(公告)日：2004-04-20

申请号：US09606810

申请日：2000-06-28

Applicant: Jong-Yoon Hwang ,  Hi-Chan Moon ,  Jong-Han Kim ,  Jin-Soo Park

Inventor： Jong-Yoon Hwang ,  Hi-Chan Moon ,  Jong-Han Kim ,  Jin-Soo Park

IPC: H04B700

CPC classification number: H04W52/283 ,  H04L1/20 ,  H04L1/201 ,  H04W52/143 ,  H04W52/24 ,  H04W52/241 ,  H04W52/247 ,  H04W52/282 ,  H04W52/288 ,  H04W52/44 ,  H04W52/54 ,  Y02D70/20

Abstract: An apparatus and method of detecting whether data exists in a received signal while a mobile communication terminal is in discontinuous transmission mode is disclosed. The apparatus and method comprises generating and transmitting a forward power control command for providing the forward power control, and performing forward power control in a mobile communication system. According to the forward power control method, a power control command is generated based on a received frame including a plurality of slots each of which includes power control bits. The ratio of the power control bit energy to noise energy, which is given by a ratio of the accumulated energy of the power control bits in the slots of the received frame to an accumulated energy value of noise in the slots of the received frame, is provided, and the power control command based on a ratio of the accumulated energy value of traffic symbol bits in the slots to the accumulated energy value of the power control bits is generated when the provided ratio of the power control bits to noise is acceptable.

Abstract translation: 公开了一种在移动通信终端处于不连续传输模式时检测接收信号中是否存在数据的装置和方法。 该装置和方法包括生成和发送用于提供正向功率控制的前向功率控制命令，以及在移动通信系统中执行正向功率控制。 根据正向功率控制方法，基于包括多个时隙的接收帧生成功率控制命令，每个时隙包括功率控制位。 由接收帧的时隙中的功率控制位的累积能量与接收帧的时隙中累积的噪声能量值的比率给出的功率控制比特能量与噪声能量的比率是 并且当所提供的功率控制比特与噪声的比率是可接受的时，产生基于时隙中的业务符号比特的累积能量值与功率控制比特的累加能量值的比率的功率控制命令。

公开(公告)号：US06487185B1

公开(公告)日：2002-11-26

申请号：US09346927

申请日：1999-07-02

Applicant: Mark Burton

Inventor： Mark Burton

IPC: H04Q700

CPC classification number: H04L1/201 ,  H04L1/20 ,  H04L1/208

Abstract: A method of improving frame erasure performance, in particular for slow frequency hopping channels with cyclic co-channel interference, by selection of the most suitable PBER threshold from a range of PBER thresholds. A burst quality metric is assigned to each burst in a frame and the bursts are then ranked in the order of the values of the assigned quality metrics. The differences in the metrics between successive bursts in the ranked order are measured. The position in the ranked order of the largest difference between bursts (dMAX) is used in the selection of the most suitable PBER threshold.

Abstract translation: 一种改进帧擦除性能的方法，特别是对于具有循环同频道干扰的慢跳频信道，通过从一定范围的PBER阈值中选择最合适的PBER阈值。 突发质量度量被分配给帧中的每个突发，然后按照分配的质量度量的值的顺序对突发进行排序。 测量在排序顺序中的连续突发之间的度量的差异。 在最合适的PBER阈值的选择中使用脉冲串（dMAX）之间最大差异的排序顺序的位置。

公开(公告)号：US06408037B1

公开(公告)日：2002-06-18

申请号：US09175237

申请日：1998-10-20

Applicant: Dean Gienger

Inventor： Dean Gienger

IPC: H04L2706

CPC classification number: H04L1/201 ,  H03M13/00 ,  H04L1/0045

Abstract: A data decoding scheme operates on individual code symbols within an encoded data stream, enabling data to be recovered from the code symbols at a high rate. The decoding scheme, typically included within a receiver of a digital communication system or data network, does not rely on processing and storing multiple code symbols and is unencumbered by storage memory elements and decoding rate limitations associated with receiving and processing blocks of multiple code symbols. The decoding scheme generates bit sequences corresponding to each alternate data state of a received code symbol. Error vectors are generated as a result of comparing each of the generated bit sequences to the received code symbol. The data state of data represented by the code symbol within the encoded data stream is recovered from the code symbol by selecting the minimum of the generated error vectors.

Abstract translation: 数据解码方案对编码数据流内的各个代码符号进行操作，从而能够以高速率从代码符号恢复数据。 通常包括在数字通信系统或数据网络的接收机内的解码方案不依赖于处理和存储多个代码符号，并且不受存储存储器元件的阻碍和与多个代码符号的块的接收和处理相关联的解码速率限制。 解码方案生成与接收到的代码符号的每个备用数据状态相对应的比特序列。 作为将所生成的位序列与接收到的代码符号进行比较的结果，生成错误向量。 通过选择生成的误差向量的最小值，从代码符号中恢复由编码数据流内的代码符号表示的数据的数据状态。

公开(公告)号：US20020069380A1

公开(公告)日：2002-06-06

申请号：US09730147

申请日：2000-12-04

Inventor： Khaled H. El-Maleh ,  Eddie-Lun Tik Choy ,  Arasanipalai K. Ananthapadmanabhan ,  Andrew P. DeJaco ,  Pengjun Huang

IPC: G06F011/00 ,  H04L001/00 ,  H03M013/00 ,  G08C025/00

CPC classification number: H04L1/08 ,  H04L1/0046 ,  H04L1/201

Abstract: A system and method for detection of rate determination algorithm errors in variable rate communications system receivers. The disclosed embodiments prevent rate determination algorithm errors from causing audible artifacts such as screeches or beeps. The disclosed system and method detects frames with incorrectly determined data rates and performs frame erasure processing and/or memory state clean up to prevent propagation of distortion across multiple frames. Frames with incorrectly determined data rates are detected by checking illegal rate transitions, reserved bits, validating unused filter type bit combinations and analyzing relationships between fixed code-book gains and linear prediction coefficient gains.

Abstract translation: 一种用于在可变速率通信系统接收机中检测速率确定算法错误的系统和方法。 所公开的实施例防止速率确定算法错误引起可听见的伪影，例如吱吱声或嘟嘟声。 所公开的系统和方法检测具有错误确定的数据速率的帧，并执行帧擦除处理和/或存储器状态清理，以防止跨多个帧的失真传播。 通过检查非法速率转换，保留位，验证未使用的过滤器类型位组合以及分析固定代码簿增益和线性预测系数增益之间的关系来检测具有不正确确定的数据速率的帧。

公开(公告)号：US5502713A

公开(公告)日：1996-03-26

申请号：US162605

申请日：1993-12-07

Applicant: Tomas Lagerqvist ,  Tor B. Minde ,  Peter Mustel ,  Hans Nilsson

Inventor： Tomas Lagerqvist ,  Tor B. Minde ,  Peter Mustel ,  Hans Nilsson

IPC: H04B14/04 ,  G10L19/00 ,  G10L21/02 ,  H03M13/03 ,  H03M13/15 ,  H04L1/20

CPC classification number: H04L1/201 ,  G10L19/005 ,  H04L1/20

Abstract: In a TDMA cellular telephone system, an error concealment method provides parameter interpolation based on soft quality measures that will enhance the speech quality under bad channel conditions compared to prior methods of repeating previous voice data frames. Specifically, the soft technique of the present invention uses a weighted combination of previous and present frame parameters, where the weighting reflects the probability of error. The present invention will improve the masking of errors compared to hard actions based on a binary detection, especially when the binary detection fails or when the received frame is declared as being "good". The method can also utilize parameter based soft information without increasing the bitrate.

Abstract translation: 在TDMA蜂窝式电话系统中，错误隐藏方法提供了基于软质量度量的参数插值，该方法将增强与不良信道条件下的语音质量相比，重复先前语音数据帧的现有方法。 具体地说，本发明的软技术使用先前和现在的帧参数的加权组合，其中加权反映错误概率。 本发明将改进与基于二进制检测的硬动作相比的错误掩蔽，特别是当二进制检测失败或者当接收到的帧被声明为“良好”时。 该方法还可以利用基于参数的软信息而不增加比特率。