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Device and method of data pocket retransmission between POS-PHY bus and PCI bus

A PCI bus and data packet technology, applied in the field of bus conversion, can solve problems such as overflow or underflow, data packet loss, difficult data transmission coordination, etc., to achieve the effect of reducing the number of times, avoiding underflow errors, and reducing occupancy

Inactive Publication Date: 2008-03-12
ZTE CORP
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Problems solved by technology

However, in a high-speed data packet transmission system, how to make full use of DMA operations and how to minimize CPU usage remains to be studied
[0005] In the design of the existing data packet transceiver device, due to the inconsistency of the data transmission rate on the system side and the line side, it is easy to overflow or underflow during transmission, so that the data packet will be lost during the transmission process. It is difficult to effectively coordinate the data transmission on the system side and the line side by existing technical methods, so there are obvious technical defects in the existing technology, which need to be improved and developed

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  • Device and method of data pocket retransmission between POS-PHY bus and PCI bus

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Embodiment Construction

[0045] The technical solutions and beneficial effects of the present invention will be apparent through the detailed description of specific preferred embodiments of the present invention below.

[0046] The device and method for forwarding data packets between the POS-PHY bus and the PCI bus of the present invention are to complete the transfer of data packets on the POS-PHY bus through a bridge forwarding device between the buses, which can also be called "bus converter". The two-way forwarding between the PCI bus and the device is realized by a field programmable logic gate array FPGA, which is a large-scale programmable device.

[0047] The transmission of all data packets in the device and method of the present invention is completed through DMA, so that the utilization of the CPU is less, the burden of the system is reduced, and the speed of data transmission is improved. Different burst transmission (burst) modes are adopted for uplink and downlink of data. In the upst...

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Abstract

The invention relates to a device and method for repeating data packet between the POS-PHY bus and the PCI bus, the device is a bridge transferring device, which includes following submodules: PCI bus interface model, PCI primary device control model, PCI slave device control model, transmission and receiving arbitrating model, PCI configuring register, PCI space register, data receiving model, data transmitting model, POS-PHY interface model; the PCI bus interface model is connected to the PCI bus, the POS-PHY interface model is connected to POS-PHY bus outer. The device and method complete the repeating of data packet between the POS-PHY bus and the PCI bus, it provides a method for transmitting data packet on the PCI bus with high efficiency, and the data packet is not easy to be lost.

Description

technical field [0001] The invention relates to a bus conversion method, in particular to a method and a device for forwarding data packets between a POS-PHY bus and a PCI bus. Background technique [0002] With the rapid development of Metropolitan Area Network (MAN), Synchronous Optical Network (SONET) / Synchronous Digital Hierarchy (SDH, from Synchronous Digital Hierarchy) technology has become a widely used transmission technology, which can provide low-latency recovery and resiliency Function, and use packet transmission technology to provide broadband multiplexing function. Many network devices provide packet protocol POS (Packet Over SDH) interfaces on SDH at various rates. On the line side, a physical layer (PHY) chip is used to complete the processing functions below the third layer, and then send the data packets to the CPU or network for processing. The device performs packet processing above layer 3. [0003] At present, only some special-purpose CPUs or network...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/10H04L29/08H04L12/56H04L12/70
Inventor 王志忠刘衡祁易湘嵘刘启明
Owner ZTE CORP
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