Multi-standard clock MicroTCA system and clock management method

Abstract

The invention discloses a MicroTCA system and a clock synchronization method and solves the problem that the introduction of a clock source is limited in the prior art. The MicroTCA system at least includes an MCH and a plurality of AMC cards connected with the MCH through a back board. The MCH includes a clock unit which is used for outputting a system synchronized clock to a predetermined clock input port of an AMC card through a predetermined output port, and at least one clock card connected with the MCH through a back board. The clock card is provided with an extra clock output end, an extra clock input end is arranged on the AMC card, the extra clock output end of the clock card outputs an extra clock to the extra clock input end of the AMC card through an extra differential line on the back board, and the AMC card is provided with a clock management unit which selectively uses the predetermined clock output by the MCH and / or the extra clock output by the AMC clock card. A special clock distribution board card is arranged inside a cabinet to support the multi-standard system clock synchronization to be suitable for a multi-standard combined scene, and a switching board MCH and an AMC board card are not needed to be redesigned. Therefore, the reusability of hardware is improved, the product development period is shortened, and the cost is reduced. Clock configuration double redundancy is allowed to improve the system reliability.

Description

Technical field: [0001] The invention relates to the field of communication technology, in particular to a multi-standard clock MicroTCA system and a clock management method. Background technique: [0002] MicroTCA, MicroTelecommunicationsComputingArchitecture (MicroTelecommunicationsComputingArchitecture) with small physical size is a platform specification formulated by the Peripheral Component Expansion Port (PCI) Industrial Computer Manufacturers Association (PICMG, PCI Industrial Computer Manufacturers Group). MicroTCA uses Advanced Mezzanine Card (AMC, Advanced MezzanineCard) to build small capacity and low cost The modular communication platform is mainly used in small telecommunication equipment such as central computer room or enterprise level communication equipment. [0003] figure 1 It is a composition structure diagram of the MicroTCA system in the prior art, such as figure 1 As shown, in a MicroTCA system, the main functional modules include: a chassis, a pow...

AI Technical Summary

Problems solved by technology

[0009] Due to the particularity of the clock synchronization signal, it is determined that the clock synchronization of the existing MicroTCA system is completely dependent on MCH technology. However, the current standard switching board MCH only supports limited clock signal input, and does not have Beidou PPS+TOD clock signal input and IEEE1588 synchronization. Mode and custom clock input, and the standard backplane only supports 3 sets of standard telecom clock distribution, and cannot support system clock synchronization under different systems

[0010] Chinese patent application number: 200710166404.8 Invention name "A system clock implementation method, system and clock function board", which adds a clock card to the MICROTCA architecture, which uses the original MCH clock channel to provide additional type of clock; however, it is limited by the original clock channel and cannot be applied to environments with more clock requirements

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