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A time-sharing storage circuit structure used in otn packet switching interface chip

A technology of interface chips and storage circuits, which is applied in the fields of electrical digital data processing and instruments, can solve problems such as difficult error control, low utilization rate of network bandwidth, and difficulty in communicating with each other, so as to reduce address delay, reduce complexity, and improve The effect of work rate

Active Publication Date: 2018-06-26
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

OTN used to be a connection-oriented circuit switching method in the past. Its disadvantage is that the bandwidth utilization rate of the network is low. During circuit switching, it is difficult for terminals of different data types, different specifications, and different rates to communicate with each other, and it is also difficult to make errors in the communication process. Control, based on the needs of market and technology development, OTN packet switching interface chips with packet switching as the switching method have been produced

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  • A time-sharing storage circuit structure used in otn packet switching interface chip
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  • A time-sharing storage circuit structure used in otn packet switching interface chip

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Embodiment Construction

[0018] Such as figure 1 , as shown in 2, this patent designs a time-sharing storage circuit structure used inside the OTN packet switching interface chip, including dividing and storing different types of data in sequence according to time slots, which reduces the complexity of circuit layout and wiring in address selection , improve the speed of circuit operation, and realize high-speed and stable data transmission in a large number of cross-clock domain transmissions. In the packet switching circuit of the OTN chip, ODU0 data is allocated according to the time slot method, so that 8 channels of ODU0 data coming at the same time are stored in a dual-port RAM.

[0019] Firstly, the read enable of the upper-level asynchronous FIFO is generated. In the 8 cutting circuits odu0_seg0 to odu0_seg7, when the port with the cutting circuit is enabled, and when the internal data cache counter is less than 109, the read enable of the upper-level corresponding asynchronous FIFO is generat...

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Abstract

The invention discloses a circuit structure capable of asynchronously processing data at a high speed, and the circuit structure supports data transmission from a low speed interface to a high speed interface. The circuit structure can be applied to transmission in an OTN. A data packet needs to be transmitted to the high speed interface to perform exchange when clock signals having various frequencies existing in data unit modules are processed, and packet switching between an OTN chip and an external chip is performed, and lots of asynchronous FIFO circuits are required; data packet output is polled, FIFO addresses and polling addresses can generate a huge address selection network, and then the circuit operation speed is decreased; the circuit structure separates the lots of FIFO circuits and recombines the FIFO circuits; and one control circuit and four dual port RAMs are combined to a new circuit structure which can process data cross clock domains.

Description

technical field [0001] The invention relates to the technical field of OTN (Optical Transport Network) ultra-high-speed optical transmission network asynchronously processing data. A time-sharing storage circuit structure used in a packet switching interface chip is designed by using the hardware description language verilog. Background technique [0002] OTN is a transmission network based on wavelength division multiplexing technology and organizes networks at the optical layer. It is the next-generation backbone transmission network. OTN is a complete optical transmission network architecture that can realize real-time transmission of optical and electrical signals. Therefore, it includes two layers of electrical and optical network systems, and can efficiently complete the transmission of customer information in accordance with relevant technical standards. [0003] OTN switching is defined as the cross-connection of digital transport containers, also known as Optical Tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/16
CPCG06F13/1673
Inventor 蒋林孟李林李赛杨博文杨望明
Owner XIAN UNIV OF POSTS & TELECOMM