Packet switching method, device and system

A packet switching and switching module technology, applied in transmission systems, digital transmission systems, data switching networks, etc., can solve problems such as increased cell overhead, increased chip costs, and impact on product development, to expand the number of ports and improve switching The effect of strong capacity and scalability

Active Publication Date: 2011-12-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When increasing the switching capacity by increasing the number of SC ports, the bit width requested by the SMi cell should be correspondingly increased to be consistent with the number of outgoing ports of the SC. For this reason, the format of the SM cell needs to be modified, resulting in an increase in the overhead of the cell. Compatible with existing SM chips, affecting product development;
[0008] When the capacity of the SM chips connected to the SC is not equal, in order to realize the wire-speed intercommunication between the SMs, it is necessary to increase the number of ports connected between the small-capacity SMs and the SC, so that the number of ports connected to all SMs and SCs in the system is equal to that of the system The number of ports connected to the medium and maximum capacity SM and SC is equal, which increases the power consumption and area of ​​the SM chip, thereby increasing the cost of the chip

Method used

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  • Packet switching method, device and system
  • Packet switching method, device and system
  • Packet switching method, device and system

Examples

Experimental program
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Embodiment 1

[0037] This embodiment provides a packet switching method, which is used in the crossbar switch module to realize the exchange of information in the shared cache switch module, wherein the shared cache switch module includes an uplink switch module and a downlink switch module, and the method includes :

[0038] receiving the original switching request sent by the uplink switching module;

[0039] copying the original switching request to obtain multiple switching requests, wherein the multiple switching requests correspond to multiple output ports of the crossbar switch module;

[0040] Arbitrate multiple switching requests according to the state of the port connected to the cross-connect switching module and the downlink switching module, so as to determine the switching path of the cells required to be switched in the original switching request, and convert the obtained arbitration result into the original switching request. Output to the uplink switch module after permiss...

Embodiment 2

[0118] This embodiment provides a packet switching method, and this embodiment still uses figure 2 The provided asymmetrical three-stage switching network structure schematic diagram is taken as an example, where the bandwidth of each link is 2.5G. see Figure 4 , the following uses SMi0 to send 10G services, 5G to SMe1, 2.5G to SMe2, and 2.5G to SMe3 as shielding conditions, and briefly describes the packet switching process:

[0119] S201: SMi0 sends a switch request to each of the first group group0 to the fourth group group3, requesting to send 2.5G services;

[0120] S202: After the first group group0 to the fourth group group3 receive the exchange request, they all copy the exchange request, and obtain 4 exchange requests after copying;

[0121] S203: Perform shielding processing on the exchange request obtained after copying according to the shielding condition, and send the shielded exchange request to the arbitration module for arbitration. The result of the arbitr...

Embodiment 3

[0138] see Figure 5 , the embodiment of the present invention also provides a packet switching system, the system includes: a shared cache switch module 301 and a crossbar switch module 302, wherein the shared cache switch module 301 and the crossbar switch module 302 can be integrated into one or more in the chip;

[0139] Wherein, the shared cache exchange module 301 includes:

[0140] The uplink switch module 301a is configured to send an original switch request to the crossbar switch module 302, and schedule and send cells to the crossbar switch module 302 after receiving a grant signal of the original switch request;

[0141] The downlink switch module 301b is configured to receive cells forwarded by the crossbar switch module 302 and send the cells to corresponding devices.

[0142] The crossbar switching module 302 is configured to receive the original switching request sent by the uplink switching module 301a, copy the original switching request, and obtain multiple...

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PUM

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Abstract

The invention discloses a method, a device and a system for packet switching, and belongs to the field of packet switching. The method comprises the following steps: receiving an original switching request sent by an uplink switching module; copying the original switching request to obtain a plurality of switching requests, arbitrating the switching requests according to the states of ports connected to a vertical-horizontal cross switching module and a downlink switching module, outputting the obtained arbitration result to the uplink switching module; receiving cells sent by the uplink switching module; and according to the arbitration result, forwarding the cells to the downlink switching module. The device comprises an input request processing module, an arbitration module and an output permission processing module. The method, the device and the system have the advantages of realizing the intercommunication between the packets, expanding the number of ports of the packet switching system, enhancing the switching capacity, simultaneously being compatible with the original SM system, and reducing the cost of the switching system, along with strong expandability.

Description

technical field [0001] The present invention relates to the field of packet switching, in particular to a packet switching method, device and system. Background technique [0002] With the development of network technology, the demand for switching capacity of switching chips is increasing, and there is also a higher demand for switching chip application flexibility and multi-scenario applications. In the prior art, there are generally two ways to improve the switching capacity of the switching chip. The first is to increase the speed of the port to achieve a higher switching capacity; the second is to increase the number of ports of the switching chip to achieve a higher switching capacity. [0003] When increasing the switching capacity by increasing the port rate, it often leads to incompatibility between the network chip and the switching chip. It is necessary to increase the port rate of the switching chip based on the rate of the network chip, which limits the improvem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/933H04L12/937
Inventor 罗焰斌王中伟朱玉斌张帆
Owner HUAWEI TECH CO LTD
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