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27 条记录 (耗时 0.012 秒)

    Packet transmission method and system
    2.
    发明公开
    Packet transmission method and system 有权
    分组传输方法及装置

    公开(公告)号：EP1249976A3

    公开(公告)日：2007-01-17

    申请号：EP02251479.8

    申请日：2002-03-04

    申请人： NTT DoCoMo, Inc.

    发明人： Yoshimura, Takeshi ,  Kawahara, Toshiro ,  Etoh, Minoru

    IPC分类号： H04L12/56 ,  H04L29/06

    CPC分类号： H04W28/06 ,  H04L1/1809 ,  H04L47/10 ,  H04L47/14 ,  H04L47/2408 ,  H04L47/2416 ,  H04L47/2433 ,  H04L2001/0098 ,  H04W28/14 ,  H04W72/1236

    摘要： A packet transmission method for transmitting packets classified according to a quality of service (QoS) requirement from a transmitting node to a receiving node is provided. In the transmitting node, the steps of selecting sequentially a QoS class; dividing a queued packet to be transmitted belonging to the selected class into a plurality of predetermined data units, and transmitting one of the obtained predetermined data units; and applying a transmitter-side retransmission control process to the data unit to be transmitted when the selected class is a QoS class specified for data type packets are provided. In the receiving node, the steps of: receiving sequentially the data units transmitted from the transmitting node; assembling a plurality of received data units to decompress the original packet for each QoS class; and applying a receiver-side retransmission control process to the received data units to be assembled when the received data unit belongs to one of the QoS classes specified for the data type packets are provided.

    Encryption apparatus, decryption apparatus, authentication information assignment apparatus, and authentication apparatus, and encryption method, decryption method, authentication information assignment method, and authentication method
    4.
    发明公开
    Encryption apparatus, decryption apparatus, authentication information assignment apparatus, and authentication apparatus, and encryption method, decryption method, authentication information assignment method, and authentication method 有权
    用于分配的认证信息，加密方法的加密装置，装置和认证信息分配方法

    公开(公告)号：EP1223706A2

    公开(公告)日：2002-07-17

    申请号：EP02250171.2

    申请日：2002-01-10

    申请人： NTT DoCoMo, Inc.

    发明人： Yoshimura, Takeshi ,  Suzuki, Takashi ,  Kawahara, Toshiro ,  Etoh, Minoru

    IPC分类号： H04L9/16 ,  H04L9/32 ,  H04L9/34

    CPC分类号： H04L9/32 ,  H04L9/065 ,  H04L2209/20 ,  H04N21/23476 ,  H04N21/44055

    摘要： An encryption apparatus (100) and an encryption method are provided which can prevent a cryptographic key or authentication key from being broken. A voice stream is transmitted from a transmitting terminal to a receiving terminal. A bit stream of the voice stream includes speech bursts and speech pauses. Although the speech bursts are encrypted or provided with authentication information, the speech pauses are not encrypted or provided with authentication information, and are transmitted without change. Thus carrying out the encryption or the assignment of the authentication information selectively in accordance with the type of the bit stream makes it possible to prevent the cryptographic key or authentication key from being broken. Besides, it can reduce the processing amount of the encryption or authentication process, thereby being able to limit an increase in the information amount.

    摘要翻译： 本发明提供一种加密装置（100）和加密方法，其可以防止被损坏的密码密钥或认证密钥。 甲的VoiceStream是从发送终端到接收终端反mitted。 所述语音流的比特流包括语音突发和暂停讲话。 虽然语音脉冲进行加密或提供认证信息，语音停顿不加密或提供认证信息，并没有改变反式mitted。 从而进行加密或认证信息选择性地雅舞蹈与比特流的类型分配能够防止加密密钥或认证密钥被破坏。 此外，它可以减少加密或认证处理的处理量，由此能够限制信息量增加。

    Device and method for reducing delay jitter in data transmission
    5.
    发明公开
    Device and method for reducing delay jitter in data transmission 有权
    德文数字中的Verfahren und Einrichtung zur Reduktion desVerzögerungsjitters

    公开(公告)号：EP1143671A2

    公开(公告)日：2001-10-10

    申请号：EP01107831.8

    申请日：2001-04-06

    申请人： NTT DoCoMo, Inc.

    发明人： Suzuki, Takashi ,  Kawahara, Toshiro ,  Morioka, Masashi ,  Naka, Nobuhiko

    IPC分类号： H04L12/56 ,  H04L29/06

    CPC分类号： H04L65/80 ,  H04L12/6418 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/2416 ,  H04L47/28 ,  H04L2012/6472 ,  H04L2012/6489

    摘要： A delay unit 103 adds holding time that has been set by a holding time setting unit 104 to a received data. The holding time is computed based on delay time of received data and the minimum delay time of data received up to a certain point for the purpose of reducing a total delay time. The delay time is estimated in a delay time estimating unit 106 from the difference between a reception time of a packet counted based on an internal clock generator 107 and a time designated by a time stamp in the received packet.

    摘要翻译： 延迟单元103将由保持时间设置单元104设置的保持时间添加到接收的数据。 保持时间是基于接收数据的延迟时间和接收到某一点的数据的最小延迟时间来计算的，以减少总延迟时间。 在延迟时间估计单元106中，根据内部时钟发生器107计数的分组的接收时间与由接收分组中的时间戳指定的时间之间的差来估计延迟时间。

    Method and apparatus for packet transmission with header compression
    8.
    发明公开
    Method and apparatus for packet transmission with header compression 有权
    用于与分组报头压缩分组传输的方法和装置

    公开(公告)号：EP1146713A3

    公开(公告)日：2003-10-15

    申请号：EP01104403.9

    申请日：2001-02-26

    申请人： NTT DoCoMo, Inc.

    发明人： Yoshimura, Takeshi ,  Kawahara, Toshiro ,  Suzuki, Takashi

    IPC分类号： H04L29/06

    CPC分类号： H04L69/04 ,  H04L29/06 ,  H04L69/16 ,  H04L69/161 ,  H04L69/167 ,  H04L69/22

    摘要： Under the situation in a network including a transmitter and a receiver in which a transmitter converts a non-compressed packet to be transmitted into a full-header packet including a full header or a header-compressed packet including a compressed header, and sends the converted packet to the receiver, the transmitter sends at least important packet in the non-compressed packet to be transmitted as a full-header packet. The important packet means for example, a packet containing the data serving an important role when the data terminal eventually receiving each packet reproduces the audio and/or image in accordance with the data in each of the packet.

    Gateway for reducing delay jitter and method for data transfer therein
    9.
    发明公开
    Gateway for reducing delay jitter and method for data transfer therein 有权
    Gateway和DatenübertragungsverfahrenzurVerzögerungsjitterreduktion

    公开(公告)号：EP1087579A2

    公开(公告)日：2001-03-28

    申请号：EP00119312.7

    申请日：2000-09-06

    申请人： NTT DoCoMo, Inc.

    发明人： Morioka, Masashi, Fuji terrace 505 ,  Suzuki, Takashi ,  Kawahara, Toshiro

    IPC分类号： H04L12/64 ,  H04L12/66 ,  H04L29/06

    CPC分类号： H04L65/104 ,  H04L12/6418 ,  H04L29/06027 ,  H04L65/103 ,  H04L65/80 ,  H04N21/23406 ,  H04N21/2368 ,  H04N21/242 ,  H04N21/64707

    摘要： A gateway for interconnecting two networks (20, 30), comprising a receiver (14A), controller (100), and transmitter (18B). The receiver (14A) receives from a first network (20) a plurality of data units in at least one form. The controller (100) temporarily stores the data units received by the receiver (14A) and outputs the data units on the basis of the dejitterizing capability of a destination terminal (31) served by a second network (30), thereby reducing jitter among delays of the data units. The transmitter (18B) sends data units corresponding to the data units output by the controller (100) to the destination terminal (31) through the second network (30).

    摘要翻译： 一种用于互连两个网络（20,30）的网关，包括接收机（14A），控制器（100）和发射机（18B）。 接收器（14A）以至少一种形式从第一网络（20）接收多个数据单元。 控制器（100）临时存储由接收机（14A）接收的数据单元，并且基于由第二网络（30）服务的目的地终端（31）的去抖动能力输出数据单元，从而减少延迟之间的抖动 的数据单位。 发送器（18B）通过第二网络（30）将与控制器（100）输出的数据单元对应的数据单元发送到目的地终端（31）。