公开(公告)号：US20050048923A1

公开(公告)日：2005-03-03

申请号：US10650865

申请日：2003-08-28

Applicant: Mohammad Mohseni ,  Roland Rick ,  Faraz Faheem ,  Helena O'Shea

Inventor： Mohammad Mohseni ,  Roland Rick ,  Faraz Faheem ,  Helena O'Shea

IPC: H04B17/00 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04L1/20 ,  H04B17/26 ,  H04B17/309 ,  H04B17/327 ,  H04B17/336 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/201

Abstract: A system and method for bad frame indication of a speech frame includes estimating a signal-to-noise ratio (SNR) and checking a cyclic redundancy code (CRC) value of the speech frame. When the speech frame fails CRC error detection or the SNR is below a pre-specified value, a bad frame indication (BFI) flag is set. When the speech frame passes CRC error detection and the SNR is above the pre-specified value, a receive signal quality metric of the speech frame is checked against a high threshold and, if need be, a low threshold. The BFI flag and the receive signal quality metric for the previous speech frame is checked when the current receive signal quality metric is between the high and low thresholds. The BFI flag is set according to the value of the SNR, the CRC value, the current and previous receive signal quality metrics, and the previous BFI flag.

Abstract translation: 用于语音帧的不良帧指示的系统和方法包括估计信噪比（SNR）和检查语音帧的循环冗余码（CRC）值。 当语音帧失败CRC错误检测或SNR低于预先设定的值时，设置不良帧指示（BFI）标志。 当语音帧通过CRC错误检测并且SNR高于预定值时，针对高阈值检查语音帧的接收信号质量度量，并且如果需要，则检查低阈值。 当当前接收信号质量度量在高阈值和低阈值之间时，检查先前语音帧的BFI标志和接收信号质量度量。 BFI标志根据SNR的值，CRC值，当前和先前的接收信号质量度量以及先前的BFI标志来设置。

公开(公告)号：US06782059B2

公开(公告)日：2004-08-24

申请号：US10061865

申请日：2002-01-31

Applicant: Yu-Chuan Lin

Inventor： Yu-Chuan Lin

IPC: H04B1707

CPC classification number: H04L1/20 ,  H04B1/7115 ,  H04L1/201 ,  H04W24/00 ,  H04W52/0216 ,  H04W52/0245 ,  H04W52/286 ,  H04W52/288 ,  H04W52/44 ,  Y02D70/25 ,  Y02D70/40

Abstract: Novel techniques are disclosed for detecting discontinuous transmission (DTX) over a communication channel. A received data frame is characterized as one of a Good frame, Erasure, or DTX. If a Good frame is not initially detected, a multi-dimensional quality metric is used to characterize the received frame as either an Erasure or DTX. A two dimensional quality metric may be generated using energy per bit to noise power ratio as a first dimension and re-encoded symbol error count as a second dimension. Alternatively, re-encoded symbol energy may be used as the second dimension of the quality metric. The communication channel may be a CDMA wireless communication channel capable of DTX and the device may be a base station, base station controller, or mobile station.

Abstract translation: 公开了用于通过通信信道检测不连续传输（DTX）的新技术。 接收到的数据帧被表征为Good帧，Erasure或DTX之一。 如果最初没有检测到好的帧，则使用多维质量度量来将接收的帧表征为擦除或DTX。 可以使用每比特噪声功率比的能量作为第一维度并且将重新编码的符号错误计数作为第二维度来生成二维质量度量。 或者，重新编码的符号能量可以用作质量度量的第二维度。 通信信道可以是能够进行DTX的CDMA无线通信信道，并且设备可以是基站，基站控制器或移动台。

公开(公告)号：US06775521B1

公开(公告)日：2004-08-10

申请号：US09642698

申请日：2000-08-09

Applicant: Yue Chen

Inventor： Yue Chen

IPC: H04B1700

CPC classification number: H04L1/20 ,  H04B17/336 ,  H04L1/201

Abstract: A method for identifying a bad GSM speed frame and simultaneously maintaining a frame erasure rate below a specified value. The method is based upon a joint use of four signal quality metrics: (1) frame CRC parity check; (2) estimated burst signal-to-noise ratio; (3) estimated frame bit error count; and (4) stealing flag values of a frame. Another feature includes providing an improved estimated burst signal-to-noise ratio.

Abstract translation: 一种识别不良GSM速度帧并同时将帧擦除率保持在指定值以下的方法。 该方法基于四个信号质量度量的联合使用：（1）帧CRC奇偶校验; （2）估计突发信噪比; （3）估计帧位错误计数; 和（4）窃取帧的标志值。 另一个特征包括提供改进的估计突发脉冲串信噪比。

公开(公告)号：US20040087331A1

公开(公告)日：2004-05-06

申请号：US10673532

申请日：2003-09-29

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

IPC: H04K001/00 ,  H04B001/713 ,  H04B015/00 ,  H04L027/30 ,  H04B007/216 ,  H04Q007/20

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. 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: 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：US20030128744A1

公开(公告)日：2003-07-10

申请号：US10338714

申请日：2003-01-09

Inventor： Soo-Bok Yeo ,  Sang-Min Bae ,  Ji-Won Ha ,  Jong-Han Kim

IPC: H04K001/00

CPC classification number: H04L1/20 ,  H04B1/70755 ,  H04B2201/70709 ,  H04L1/201

Abstract: An apparatus for detecting a frame transmission period in a CDMA mobile communication system supporting a discontinuous transmission mode. A first frame detector performs primary frame detection by calculating a signal-to-interference ratio (SIR) using traffic symbol energy, pilot symbol energy and noise energy measured for a predetermined time period, and comparing the SIR with a predetermined frame detection threshold value. A decoder calculates a symbol error rate (SER) by decoding symbols received for the predetermined time period. A second frame detector selects an SER threshold value according to frame detection information from the first frame detector, and compares the selected SER threshold value with the SER to determine whether a frame has been transmitted.

Abstract translation: 一种在支持不连续传输模式的CDMA移动通信系统中检测帧传输周期的装置。 第一帧检测器通过使用在预定时间段内测量的业务符号能量，导频符号能量和噪声能量，并将SIR与预定帧检测阈值进行比较来计算信号干扰比（SIR）来执行主帧检测。 解码器通过解码在预定时间段内接收到的符号来计算符号错误率（SER）。 第二帧检测器根据来自第一帧检测器的帧检测信息选择SER阈值，并将所选择的SER阈值与SER进行比较，以确定帧是否已被发送。

公开(公告)号：US20030101386A1

公开(公告)日：2003-05-29

申请号：US10283056

申请日：2002-10-30

Applicant: EVOLIUM S.A.S.

Inventor： Jerome Brouet ,  Nicolas Paul ,  Carine Thirouard

IPC: G06F011/00

CPC classification number: H04L1/201 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/203

Abstract: The present invention relates to a method for detecting errors in a real-time data entity received at a receiver of a radio communication network, the real-time data entity being transported in a radio block over a radio channel, the real time data frame comprising at least two bit portions having different relevance. According to the present invention, the method comprises the steps of: i estimating a first bit error rate for a first bit portion; ii checking if the first estimated bit error rate is higher than a first predefined threshold, iii estimating a second bit error rate for a second bit portion having a lower relevance than the first bit portion; iv checking if the second estimated bit error rate is higher than a second predefined threshold higher than the first predefined threshold, v replacing the entire real-time data entity by using a concealment algortihm if one of the checks is true.

Abstract translation: 本发明涉及一种用于检测在无线电通信网络的接收机处接收到的实时数据实体中的错误的方法，所述实时数据实体通过无线电信道在无线电块中传输，所述实时数据帧包括 至少两个位部分具有不同的相关性。 根据本发明，该方法包括以下步骤：i估计第一比特部分的第一比特误码率; ii检查第一估计误码率是否高于第一预定阈值，iii估计具有比第一比特部分低的相关性的第二比特部分的第二比特误码率; iv检查第二估计误码率是否高于高于第一预定阈值的第二预定义阈值，v如果检查中的一个为真，则使用隐藏algortihm替换整个实时数据实体。

公开(公告)号：US20020166092A1

公开(公告)日：2002-11-07

申请号：US10106860

申请日：2002-03-22

Applicant: Nokia Corporation

Inventor： Pekka Kyosti ,  Mikko Saily

IPC: H03M013/00

CPC classification number: H04L1/201 ,  H04L1/0054 ,  H04L1/007 ,  H04L1/20 ,  H04L2001/0098

Abstract: The present invention discloses a method for identifying unusable data blocks (bad frames) during communication in a network. The method comprises the steps of determining (S1) a classifier (CL_C) in a current data block, calculating (S3) a mean (M) of classifiers (CLnull1 to CL_N) of a predetermined number (N) of data blocks, calculating (S4) a standard deviation (a) of the classifiers (CLnull1 to CL_N), calculating (S5) a threshold for identifying bad frames on the basis of the mean (M) and the standard deviation (null) of the classifiers (CLnull1 to CL_N), and distinguishing (S6) whether the current data block is usable or not on the basis of a comparison of the threshold (TH) and the current classifier (CL_C). The present invention also includes a device for carrying out this method. By the method and the device, changing conditions of a radio channel can be taken into account quickly.

Abstract translation: 本发明公开了一种在网络通信期间识别不可用数据块（坏帧）的方法。 该方法包括以下步骤：确定（S1）当前数据块中的分类器（CL_C），计算（S3）预定数量（N）数据块的分类器（CL-1至CL_N）的平均值（M） 计算（S4）分类器（CL-1至CL_N）的标准偏差（a），基于分类器的平均值（M）和标准偏差（sigma）来计算（S5）用于识别不良帧的阈值 （CL-1至CL_N），并且基于阈值（TH）和当前分类器（CL_C）的比较来区分（S6）当前数据块是否可用。 本发明还包括用于执行该方法的装置。 通过该方法和设备，可以快速地考虑无线电信道的变化条件。

公开(公告)号：US20020150069A1

公开(公告)日：2002-10-17

申请号：US10162514

申请日：2002-06-03

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

IPC: H04B007/216

CPC classification number: H04L1/20 ,  H01L23/53295 ,  H01L24/02 ,  H01L2924/01004 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01014 ,  H01L2924/01019 ,  H01L2924/01027 ,  H01L2924/01033 ,  H01L2924/01067 ,  H01L2924/01074 ,  H01L2924/01075 ,  H04B17/26 ,  H04B17/318 ,  H04B17/327 ,  H04B17/336 ,  H04L1/201 ,  H04W36/08 ,  H04W48/20 ,  H04W52/0216 ,  H04W52/0245 ,  H04W72/08 ,  H04W88/02 ,  Y02D70/25

Abstract: A method and apparatus for supervising a dedicated control channel when in the discontinuous transmission mode. The mobile station monitors the frames it receives from a base station and maintains a counter of bad, good, and empty frames, referred to as CNT1, CNT2, CNT3, respectively. If a received frame is a good frame, CNT1 is reset to zero and CNT2 is incremented. If the received frame is a bad frame, CNT1 is incremented and CNT2 is reset to zero. If the received frame is an empty frame, CNT1 and CNT2 are unchanged but CNT3 is incremented. A transmitter coupled to the mobile station is enabled or disabled depending upon which, if any, of the CNTs reaches or exceeds a designated threshold value. In another embodiment, an average aggregated value reflecting the strength of the pilot signals in an active set, measured at the mobile station, is used for comparison to a threshold.

Abstract translation: 一种用于在不连续传输模式下监视专用控制信道的方法和装置。 移动台监视从基站接收到的帧，并分别维护称为CNT1，CNT2，CNT3的不良，良好和空的帧的计数器。 如果接收到的帧是一个好的帧，CNT1被重置为零并且CNT2被递增。 如果接收到的帧是坏帧，则CNT1递增，CNT2复位为零。 如果接收到的帧是空帧，则CNT1和CNT2不变，但CNT3增加。 取决于CNT的哪些（如果有的话）达到或超过指定的阈值，耦合到移动台的发射机被启用或禁用。 在另一个实施例中，反映在移动站测量的活动集中的导频信号的强度的平均聚合值用于与阈值进行比较。

公开(公告)号：US20020086692A1

公开(公告)日：2002-07-04

申请号：US09751462

申请日：2000-12-29

Inventor： Ashvin H. Chheda ,  Geng Wu

IPC: H04Q007/00

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 the mobile 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移动设备。 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：US20020080740A1

公开(公告)日：2002-06-27

申请号：US09339342

申请日：1999-06-23

Inventor： YU-CHEUN JOU ,  EDWARD G. TIEDEMAN JR.

IPC: H04B007/216

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计数器COUNT1，以及连续的良好帧计数器COUNT2。 在呼叫开始时，COUNT1和COUNT2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COUNT1复位为零，并且COUNT2递增1.如果接收的帧是坏帧，则COUNT1递增1，并且COUNT2被重置为零。 如果接收到的帧是空帧，则COUNT1和COUNT2不变。 如果COUNT1达到阈值TH1，移动台将禁用其发射机。 此后，如果COUNT2达到阈值TH2，则移动台应重新使能其发射机。 当COUNT2大于或等于TH3时，移动台将其衰减定时器复位为X秒。