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Time synchronous pluggable transceiver

A transceiver and time stamp technology, applied in synchronization devices, multiplexing communication, time division multiplexing systems, etc., can solve the problems of damaging the synchronous Ethernet clock chain and affecting the performance of the IEEE1588 standard.

Active Publication Date: 2016-06-22
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the internal path of the node before / after the timestamp of the input / output message will be very long, the process of introducing Ethernet signals at the physical layer of the SFP damages the Synchronous Ethernet (SyncE) clock chain, thereby affecting the IEEE1588 standard. performance

Method used

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Embodiment Construction

[0025] For the sake of brevity, all references to Ethernet below refer to electrical Ethernet unless optical Ethernet is specifically mentioned.

[0026] As mentioned earlier, in Electrical Ethernet SFPs, Ethernet signal processing at the physical layer breaks the Synchronous Ethernet (syncE) clock chain. figure 1 This situation is illustrated, where the figure depicts a basic block diagram of a known Electrical Ethernet SFP.

[0027] Physical layer (PHY) preprocessing in the SFP results in the inability to provide recovered SyncE timing in the receive direction to the near-end Ethernet line card located at the SFP host device, and this portion of the electronics on the SFP printed circuit board is marked as 102. Such as figure 1 As shown, electrical Ethernet frame 122 arrives at SFP 110 via RJ45 jack 116 . These electrical Ethernet frames 122 have SyncE timing indicated here at 118 . While the electrical Ethernet frame 122 is propagated through the electronics (line recei...

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Abstract

The invention discloses a pluggable transceiver module (200) comprising a line receiver (208) connected to a unit interface transmitter (202), a line transmitter (206) connected to a unit interface receiver (204) and a timestamp counter (210) adapted to generate counter values based on clock signals received from an external source and to send the counter values to the line transmitter (206) and to the line receiver (208). The line transmitter (206) and the line receiver (208) are adapted to associate timing packets in a stream of data packets transmitted and received by the pluggable transceiver module (200) with counter values output by the timestamp counter (210).

Description

technical field [0001] The present invention generally relates to synchronization in pluggable transceiver modules, and more particularly to time synchronization in small pluggable transceiver modules. Background technique [0002] The backhaul network connects the core network with smaller edge networks or network elements. In a mobile communication network, one example regarding a backhaul network (mobile backhaul) is a network connecting wireless base stations to base station controllers corresponding thereto. Currently, implementing these backhaul networks using Ethernet is becoming an increasingly popular solution. [0003] The connection of an Ethernet link to a network device (such as an Ethernet switch) can be accomplished by means of a small form-factor pluggable (SFP) transceiver. Ethernet exists in both optical and electrical formats, and existing SFPs on the market either support electrical Ethernet or optical Ethernet. Small form-factor pluggable transceivers...

Claims

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0667H04J3/0697H04L7/0087H04L7/0331
Inventor Q·杨F·帕西奥雷镇东S·鲁菲尼
Owner TELEFON AB LM ERICSSON (PUBL)
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