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Method for routing sync messages

一种同步消息、路由的技术，应用在同步误差的校正、多路复用通信、时分多路复用系统等方向

Active Publication Date: 2017-05-31
ORANGE SA (FR)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of hardware medium for PTP has a certain number of disadvantages

Method used

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  • Method for routing sync messages
  • Method for routing sync messages

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0052] figure 1 A system 10 for routing synchronization messages in a packet communication network 1 is shown. The packet communication network 1 is eg an IP network, or an MPLS Label Switching network, MPLS stands for "Multiprotocol Label Switching", or Ethernet. It includes multiple routing devices, some of which are 11-17 in figure 1 As shown in , they are designed to route packets in a network. Such routing devices 11-17 comprise input / output ports designed to receive and transmit packets. It will be recalled that at this juncture a packet to be routed in a packet communication network includes a destination address notably in a header. Routing devices 12, 14, 16 include image 3 The global routing table 108 shown in , which associates output ports with destination addresses. Thus, upon receiving a packet, the routing device 12, 14, 16 checks whether the received packet is intended for it, and if this is not the case, it uses the destination address of the received pa...

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Abstract

The present invention relates to a method for routing synchronization messages in a packet communication network, wherein packets are routed by means of a routing table called a global routing table. A device (12, 14, 16) in the network implements the following steps: detecting a packet carrying a synchronization message in a packet flow; determining an output port; transmitting a packet carrying the synchronization message at the determined output port, the synchronization message using the A piece of information on the transit time in the device to modify. A synchronization routing table is configured in this device in which at least one association between an input port and at least one output port is stored. When the packet carrying the received synchronization message indicates that it needs to be routed by means of the synchronization routing table, the device determines the output port of the packet according to the input port on which the packet was received and by reading the synchronization routing table.

Description

technical field [0001] The present invention relates to the field of communication networks and, more particularly, to the field of synchronization in these networks. Background technique [0002] The development of mobile networks has created new demands on the synchronization to be provided by base stations: in addition to intra-frequency synchronization, base stations may require in-phase and / or simultaneous synchronization, with a very limited precision of the order of one microsecond. [0003] When transferring this type of synchronization over a network, multiple devices in a packet communication network or transport network need to have hardware functions dedicated to the transmission of a synchronization message, which allows avoiding variable waits for synchronization messages mainly caused by the device's buffer memory Transitional time-varying phenomena created by time. [0004] Most of the proposed schemes use a time set protocol, such as the PTP protocol, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/701H04J3/06
CPCH04L45/00H04J3/0673H04J3/0667H04L7/0016
Inventor S.约伯特F.乔奈
Owner ORANGE SA (FR)