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    • 8. 发明申请
    • METHOD FOR SYNCHRONIZING A CLOCK OF A NETWORK COMPONENT WITH A CLOCK OF FURTHER NETWORK COMPONENT AND NETWORK COMPONENT THEREFOR
    • 用于与网络组件的时钟同步的进一步网络组件及其网络组件的时钟的方法
    • WO2008138850A1
    • 2008-11-20
    • PCT/EP2008/055677
    • 2008-05-08
    • THOMSON LICENSINGSIEMENS, EduardAUST, AndreasBROCKE, JensGLÄSER, FrankKÖHLER, RalfKUBSCH, Stefan
    • SIEMENS, EduardAUST, AndreasBROCKE, JensGLÄSER, FrankKÖHLER, RalfKUBSCH, Stefan
    • H04J3/06H04L12/56
    • H04J3/0667
    • The invention relates to a method for synchronizing a clock of a network component (A) with a clock of a further network component (B) communicatively connected to the network component (A) in a network and a network component, whereby the method comprises the following steps: determining a set of forward transition delays for transmission of messages from the network component (A) to the further network component (B) and a set of corresponding backward transition delays for transmission of messages from the further network component (B) to the network component (A), selecting a minimum forward transition delay (minF) from the set of forward transition delays, selecting a minimum backward transition delay from the set of backward transition delays (minB), deriving an estimated value for an offset between the clock of the network component (A) and the clock of the further network component (B) from the selected minimum forward transition delay (minF) and minimum backward transition delay (minB), and adjusting the clock of the network component (A) in accordance with the estimated value for the offset estimate.
    • 本发明涉及一种使网络组件(A)的时钟与网络和网络组件中的网络组件(A)通信连接的另一网络组件(B)的时钟同步的方法,由此该方法包括: 以下步骤:确定用于从网络组件(A)到另外的网络组件(B)的消息传输的一组前向转换延迟以及用于从所述另外的网络组件(B)到所述另外的网络组件(B)的消息传输的一组相应的后向过渡延迟 所述网络组件(A)从所述一组正向转移延迟中选择最小正向转移延迟(minF),从所述一组反向转移延迟(minB)中选择最小反向转移延迟,导出所述后向转移延迟 网络组件(A)的时钟和另外的网络组件(B)的时钟从所选择的最小正向转变延迟(minF)和最小向后转换段 y(minB),并且根据偏移估计的估计值调整网络组件(A)的时钟。
    • 10. 发明申请
    • A METHOD OF MANAGING A PACKET ADMINISTRATION MAP
    • 管理分发管理地图的方法
    • WO2010108958A1
    • 2010-09-30
    • PCT/EP2010/053840
    • 2010-03-24
    • THOMSON LICENSINGKUBSCH, StefanSIEMENS, EduardAUST, Andreas
    • KUBSCH, StefanSIEMENS, EduardAUST, Andreas
    • H04L1/18G06F17/30
    • H04L1/1835H04L1/1838H04L1/1841
    • The present invention relates to a method of managing a packet administration map for data packets to be received via a network, particularly for packet groups organized in sequences of consecutive packets. In the field of networking and reliable data transport, as for example in case of TCP, bursty packet drops occur during a data transmission. Especially in high speed networks like in 10 Gb Ethernet, the handling of lost and retransmitted packets can introduce a disproportionate decrease of the net data rate. A reliable transport protocol usually retransmits a data packet that a receiver was not able to receive and thus was not acknowledged. In order to manage data packets that are retransmitted, a receiver in the network monitors sequence numbers and stores missing sequence numbers within an internal data structure, called packet administration map. According to the invention a reversed keying is used which means that the upper limit of the range of contiguous missing data packets is used as the key entry in the administration map. As the retransmitted packets usually are retransmitted in an increasing order of sequence numbers, with the help of the invention it becomes very seldomly necessary to split a packet administration entry or to create a new packet administration entry.
    • 本发明涉及一种管理要经由网络接收的数据分组的分组管理映射的方法,特别是针对以连续分组的顺序组织的分组组。 在网络和可靠数据传输领域,例如在TCP的情况下,在数据传输期间发生突发分组丢失。 特别是在像10 Gb以太网这样的高速网络中,丢失和重发数据包的处理可能会导致净数据速率的不成比例的下降。 可靠的传输协议通常重传接收机不能接收的数据分组,因此未被承认。 为了管理重传的数据包,网络中的接收器监视序列号,并在内部数据结构中存储丢失的序列号,称为数据包管理映射。 根据本发明,使用反向键控,这意味着连续丢失数据分组的范围的上限被用作管理图中的键入口。 由于重传的分组通常按照序列号的增加顺序被重传,借助于本发明,分割分组管理条目或者创建新的分组管理条目变得非常必要。