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1. 发明申请

WO9952219A8 IDLE MODE FOR DIGITAL SUBSCRIBER LINE 审中-公开
标题翻译：数字用户线的空闲模式
公开(公告)号：WO9952219A8
公开(公告)日：2000-03-16
申请号：PCT/US9907548
申请日：1999-04-06
申请人： 3COM CORP
发明人： MUELLER A JOSEPH , WILLIAMS RICHARD G C , ROSENLOF JOHN
IPC分类号： H04M11/06 , H04B1/38
CPC分类号： H04M11/062 , Y02D50/44
摘要： A system and method for generating and repetitively transmitting a single modulated symbol during idle periods in user data in a digital subscriber line (DSL) communication system. The spectral properties of the transmitted modulated symbol match those of user data modulated symbols. For an asynchronous DSL system, a preferred idle symbol is the "superframe" synchronization symbol. A separate modulated end-of-idle symbol is the idle symbol shifted by a 180 DEG phase shift. The transmitter in a DSL modem would calculate the idle state modulated symbol once at the start of the idle period and then simply repeat this symbol until the end of the period, in which case the transmitter would invert the final idle symbol. At the receiver (600), symbol detection (606) can be performed in the time-domain for faster and easier detection, requiring little processing power. Upon detection the end-of-idle symbol (610), the receiver exits the idle mode (614).
摘要翻译：一种用于在数字用户线（DSL）通信系统中的用户数据中的空闲周期期间生成和重复发送单个调制符号的系统和方法。发射调制符号的频谱特性与用户数据调制符号的频谱特性相匹配。对于异步DSL系统，优选的空闲符号是“超帧”同步符号。一个单独的调制的空闲空闲符号是空闲符号移位180°相移。 DSL调制解调器中的发射机将在空闲周期开始时计算空闲状态调制符号一次，然后简单地重复该符号直到周期结束，在这种情况下，发射机将反转最终的空闲符号。在接收机（600），可以在时域中执行符号检测（606），以便更快更容易地进行检测，从而需要很少的处理能力。当检测到空闲符号（610）时，接收机退出空闲模式（614）。

2. 发明申请

WO0137503A9 METHOD AND SYSTEM FOR ANALYTICALLY COMPUTING AND USING AN ANSPCM SIGNAL 审中-公开
标题翻译：用于分析计算和使用ANSPCM信号的方法和系统
公开(公告)号：WO0137503A9
公开(公告)日：2002-07-25
申请号：PCT/US0031808
申请日：2000-11-17
申请人： 3COM CORP
发明人： MUELLER A JOSEPH , ROSENLOF JOHN
IPC分类号： H04M1/24 , H04L1/00 , H04L1/24 , H04L5/14 , H04L25/49 , H04M11/00
CPC分类号： H04L1/0007 , H04L1/242 , H04L5/1438 , H04L25/4927
摘要： A method and system for analytically and dynamically generating a repeatable digital probing signal representing an answer tone. The probing signal may conveniently be used by a modem to determine whether characteristics of the communication path between the modem and another end are sufficiently similar to these of a previous communication path, such that a shortened training sequence can be employed between two ends. When the modem initiates communication, the modem applies a predefined algorithm to dynamically generate a sequence of samples representing an answer tone signal. Next, the modem encodes the generated sequence of samples into a sequence of codewords and sends it to a second modem via a transmission path. When the second modem receives each codeword of the sequence, the second modem dynamically generates a respective codeword and compares it to the received codeword. Using the received sequence of codewords and the dynamically generated sequence of codewords, the second modem may determine whether a shortened training sequence may be employed.
摘要翻译：一种用于分析和动态地生成表示应答音的可重复数字探测信号的方法和系统。探测信号可以方便地由调制解调器使用以确定调制解调器和另一端之间的通信路径的特性是否与先前通信路径的特征充分相似，使得可以在两端之间采用缩短的训练序列。当调制解调器发起通信时，调制解调器应用预定义的算法来动态地生成表示应答音信号的样本序列。接下来，调制解调器将生成的样本序列编码成码字序列，并经由传输路径将其发送到第二调制解调器。当第二调制解调器接收到序列的每个码字时，第二调制解调器动态地生成相应的码字并将其与接收到的码字进行比较。使用所接收的码字序列和动态生成的码字序列，第二调制解调器可以确定是否可以采用缩短的训练序列。

3. 发明申请

WO0137503A3 METHOD AND SYSTEM FOR ANALYTICALLY COMPUTING AND USING AN ANSPCM SIGNAL 审中-公开
标题翻译：分析计算和使用ANSPCM信号的方法和系统
公开(公告)号：WO0137503A3
公开(公告)日：2002-04-04
申请号：PCT/US0031808
申请日：2000-11-17
申请人： 3COM CORP
发明人： MUELLER A JOSEPH , ROSENLOF JOHN
IPC分类号： H04M1/24 , H04L1/00 , H04L1/24 , H04L5/14 , H04L25/49 , H04M11/00
CPC分类号： H04L1/0007 , H04L1/242 , H04L5/1438 , H04L25/4927
摘要： A method and system for analytically and dynamically generating a repeatable digital probing signal representing an answer tone. The probing signal may conveniently be used by a modem to determine whether characteristics of the communication path between the modem and another end are sufficiently similar to these of a previous communication path, such that a shortened training sequence can be employed between two ends. When the modem initiates communication, the modem applies a predefined algorithm to dynamically generate a sequence of samples representing an answer tone signal. Next, the modem encodes the generated sequence of samples into a sequence of codewords and sends it to a second modem via a transmission path. When the second modem receives each codeword of the sequence, the second modem dynamically generates a respective codeword and compares it to the received codeword. Using the received sequence of codewords and the dynamically generated sequence of codewords, the second modem may determine whether a shortened training sequence may be employed.
摘要翻译：一种用于分析和动态生成表示应答音的可重复数字探测信号的方法和系统。调制解调器可以方便地使用探测信号来确定调制解调器与另一端之间的通信路径的特性是否与先前的通信路径的通信路径的特性足够相似，从而可以在两端之间采用缩短的训练序列。当调制解调器启动通信时，调制解调器应用预定义算法来动态生成表示应答音信号的样本序列。接下来，调制解调器将所产生的采样序列编码成码字序列，并通过传输路径将其发送到第二调制解调器。当第二调制解调器接收序列的每个码字时，第二调制解调器动态地产生相应的码字并将其与接收到的码字进行比较。使用接收到的码字序列和动态生成的码字序列，第二调制解调器可以确定是否可以使用缩短的训练序列。

4. 发明申请

WO9931813A3 SYSTEM AND METHOD FOR USER INFORMATION TRANSFER BEFORE MODEM CONNECTION 审中-公开
标题翻译：用于调制解调器连接之前的用户信息传输的系统和方法
公开(公告)号：WO9931813A3
公开(公告)日：1999-08-26
申请号：PCT/US9826763
申请日：1998-12-16
申请人： 3COM CORP
发明人： WILLIAMS RICHARD G C , ROSENLOF JOHN
IPC分类号： H04M11/06 , H04B1/38 , H04L7/10
CPC分类号： H04M11/06
摘要： A system and method for user information (DataA; DataB) transfer before modem connection. The invention makes high-speed modems more efficient, particularly for transaction and Internet applications, by providing for transmission of pre-connection user data (DataA+; DataA'+; DataB+; DataB'+) during modem training. A training sequence for a modem in accordance with the invention may be summarized as follows: beginning training of the modem at a first data rate using a defined training sequence (PSA; PSB); after a selected amount of training, transmitting pre-connection user data (DataA+; DataB) from the modem at up to the first data rate while continuing training of the modem; ending training (EOSA; EOSB); and enabling transmission of user data (DataA; DataB) at a full connected data rate of the modem. The invention may also include the following training sequence before enabling transmission of user data at the full connected data rate of the modem: beginning secondary training of the modem at a second data rate using a defined training sequence (PSA'; PSB'); after a selected amount of secondary training, transmitting pre-connection user data (DataA'+; DataB'+) from the modem at up to the second data rate while continuing secondary training of the modem; and ending secondary training (EOSA'; EOSB').
摘要翻译：调制解调器连接前的用户信息（DataA; DataB）传输的系统和方法。通过在调制解调器训练期间提供预连接用户数据（DataA +; DataA'+; DataB +; DataB'+）的传输，本发明使得高速调制解调器更有效，特别是用于交易和互联网应用。根据本发明的调制解调器的训练序列可以概括如下：使用定义的训练序列（PSA; PSB）以第一数据速率开始训练调制解调器; 在经过选定的训练后，在调制解调器继续训练的同时从调制解调器发送预连接用户数据（DataA +; DataB），直到第一数据速率; （EOSA; EOSB）; 并且能够以调制解调器的完全连接的数据速率传输用户数据（DataA; DataB）。本发明还可以包括以下训练序列：在以调制解调器的全连接数据速率传输用户数据之前：使用定义的训练序列（PSA'; PSB'）以第二数据速率开始调制解调器的二次训练; 在经过选定次数的次级训练之后，在调制解调器接收二次训练的同时，从调制解调器发送预连接用户数据（DataA'+; DataB'+）到第二数据速率; 并结束中级培训（EOSA'; EOSB'）。

5. 发明专利

DE10085285T1 未知
公开(公告)号：DE10085285T1
公开(公告)日：2003-01-16
申请号：DE10085285
申请日：2000-11-17
申请人： 3COM CORP SANTA CLARA
发明人： MUELLER A JOSEPH , ROSENLOF JOHN
IPC分类号： H04M1/24 , H04L1/00 , H04L1/24 , H04L5/14 , H04L25/49 , H04M11/00 , H04L27/00
摘要： A method and system for analytically and dynamically generating a repeatable digital probing signal representing an answer tone. The probing signal may conveniently be used by a modem to determine whether characteristics of the communication path between the modem and another end are sufficiently similar to these of a previous communication path, such that a shortened training sequence can be employed between two ends. When the modem initiates communication, the modem applies a predefined algorithm to dynamically generate a sequence of samples representing an answer tone signal. Next, the modem encodes the generated sequence of samples into a sequence of codewords and sends it to a second modem via a transmission path. When the second modem receives each codeword of the sequence, the second modem dynamically generates a respective codeword and compares it to the received codeword. Using the received sequence of codewords and the dynamically generated sequence of codewords, the second modem may determine whether a shortened training sequence may be employed.

6. 发明专利

AU1920999A System and method for user information transfer before modem connection 未知
公开(公告)号：AU1920999A
公开(公告)日：1999-07-05
申请号：AU1920999
申请日：1998-12-16
申请人： 3COM CORP
发明人： WILLIAMS RICHARD G C , ROSENLOF JOHN
IPC分类号： H04M11/06 , H04B1/38
摘要： A system and method for user information transfer before modem connection. The invention makes high-speed modems more efficient, particularly for transaction and Internet applications, by providing for transmission of pre-connection user data during modem training. A training sequence for a modem in accordance with the invention may be summarized as follows: beginning training of the modem at a first data rate using a defined training sequence; after a selected amount of training, transmitting pre-connection user data from the modem at up to the first data rate while continuing training of the modem; ending training; and enabling transmission of user data at a full connected data rate of the modem. The invention may also include the following training sequence before enabling transmission of user data at the full connected data rate of the modem: beginning secondary training of the modem at a second data rate using a defined training sequence; after a selected amount of secondary training, transmitting pre-connection user data from the modem at up to the second data rate while continuing secondary training of the modem; and ending secondary training.

7. 发明专利

AU2905701A Method and system for analytically computing and using an anspcm signal 未知
公开(公告)号：AU2905701A
公开(公告)日：2001-05-30
申请号：AU2905701
申请日：2000-11-17
申请人： 3COM CORP
发明人： MUELLER A JOSEPH , ROSENLOF JOHN
IPC分类号： H04M1/24 , H04L1/00 , H04L1/24 , H04L5/14 , H04L25/49 , H04M11/00 , H04L27/00
摘要： A method and system for analytically and dynamically generating a repeatable digital probing signal representing an answer tone. The probing signal may conveniently be used by a modem to determine whether characteristics of the communication path between the modem and another end are sufficiently similar to these of a previous communication path, such that a shortened training sequence can be employed between two ends. When the modem initiates communication, the modem applies a predefined algorithm to dynamically generate a sequence of samples representing an answer tone signal. Next, the modem encodes the generated sequence of samples into a sequence of codewords and sends it to a second modem via a transmission path. When the second modem receives each codeword of the sequence, the second modem dynamically generates a respective codeword and compares it to the received codeword. Using the received sequence of codewords and the dynamically generated sequence of codewords, the second modem may determine whether a shortened training sequence may be employed.

8. 发明专利

AU3385299A Idle mode for digital subscriber line 未知
公开(公告)号：AU3385299A
公开(公告)日：1999-10-25
申请号：AU3385299
申请日：1999-04-06
申请人： 3COM CORP
发明人： MUELLER A JOSEPH , WILLIAMS RICHARD G C , ROSENLOF JOHN
IPC分类号： H04M11/06 , H04B1/38
摘要： A system and method for generating and repetitively transmitting a single modulated symbol during idle periods in user data in a digital subscriber line (DSL) communication system. The modulated symbol to be transmitted is selected such that its spectral properties match those of user data modulated symbols. For an asynchronous DSL system, and variants thereof, a preferred idle symbol is the "superframe" synchronization symbol. A separate modulated symbol would indicate the end of the idle state. In the preferred embodiment, the end-of-idle symbol is the idle symbol shifted by a 180 DEG phase shift. In a preferred embodiment, the transmitter in a DSL modem would calculate the idle state modulated symbol once at the start of the idle period and then simply repeat this symbol until the end of the idle period, in which case the transmitter would invert the final idle symbol. At the receiver, an idle state modulated symbol detector and phase detector are implemented. Symbol detection can be performed in the time-domain for faster and easier detection, requiring little processing power. Upon detection of a 180 DEG phase shift of the idle symbol, the receiver would exit the idle mode. The invention includes method, apparatus, and computer program implementations.

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