METHOD FOR DETECTING RECEIVE END, DETECTION CIRCUIT, OPTICAL MODULE, AND SYSTEM

摘要

A method for detecting a receive end, a detection circuit, an optical module, and a system are provided, and relate to the field of optical communications. The method includes: transmitting a first detection code pattern to a PCI-E receive end through optical transmission, so that after receiving the first detection code pattern, the PCI-E receive end feeds back a second detection code pattern through the optical transmission; detecting whether the second detection code pattern fed back by the PCI-E receive end through the optical transmission is received; and determining that the PCI-E receive end is in position if a detection result is that the second detection code pattern fed back by the PCI-E receive end through the optical transmission is received.

主权项

1. A method for detecting a Peripheral Component Interconnect Express (PCI-E) receive end in a bus system, the bus system comprises a PCI-E transmit end, the PCI-E receive end, a first optical module communicating with the PCI-E transmit end, and, a second optical module communicating with the first optical module by using an optical fiber and communicating with the PCI-E receive end, wherein the method comprises:
transmitting, by the PCI-E transmit end, a first detection code pattern to the PCI-E receive end via the first optical module and the second optical module after a link machine state of the PCI-E transmit end switches from a Detect.Quiet sub-state into a Detect.Active sub-state, wherein the Detect.Quiet sub-state represents that the PCI-E transmit end is in an electrical idle state, and the Detect.Active sub-state represents that the PCI-E transmit end is detecting whether the PCI-E receive end is in position; receiving, by the PCI-E transmit end, a second detection code pattern fed back by the PCI-E receive end via the first optical module and the second optical module; and determining, by the PCI-E transmit end, that the PCI-E receive end is in position if the second detection code pattern corresponds to the first detection code pattern.