Method, apparatus, and system for configuring high-speed serial bus parameter

Patent metadata

Field	Value
Publication number	US-9940294-B2
Application number	US-201514820071-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Aug 18, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A method for configuring a high-speed serial bus parameter, including sending an application signal from a transmit end of a high-speed serial bus to a receive end of the high-speed serial bus, searching a parameter configuration table for a high-speed serial bus parameter that matches all of a frequency of the application signal, a loss of the application signal on the high-speed serial bus, and a material type of a wiring board of the high-speed serial bus, and configuring the high-speed serial bus according to the high-speed serial bus parameter. According to the method, a problem involving configuration of a high-speed serial bus parameter when a transmitted signal is compensated may be solved.

First claim

What is claimed is:

1. A method for configuring a high-speed serial bus parameter, comprising:
sending an application signal from a transmit end of a high-speed serial bus to a receive end of the high-speed serial bus, wherein the application signal is used to carry information about transmission data;
acquiring a loss of the application signal on the high-speed serial bus and a material type of a wiring board of the high-speed serial bus;
acquiring a frequency of the application signal according to one of a transmit rate and a receive rate of the application signal;
searching a parameter configuration table for the high-speed serial bus parameter that matches all of: the frequency of the application signal, the loss of the application signal on the high-speed serial bus, and the material type of the wiring board of the high-speed serial bus, wherein the parameter configuration table comprises a correspondence between a bus parameter and a signal frequency, a signal loss, and a material type of a wiring board;
configuring the high-speed serial bus according to the high-speed serial bus parameter,
wherein acquiring the material type of the wiring board of the high-speed serial bus comprises:
sending a first code stream, a second code stream, and a third code stream from the transmit end of the high-speed serial bus to the receive end of the high-speed serial bus;
acquiring an amplitude A 1 of the first code stream at the transmit end of the high-speed serial bus and an amplitude A 1 ′ of the first code stream at the receive end of the high-speed serial bus;
acquiring an amplitude A 2 of the second code stream at the transmit end of the high-speed serial bus and an amplitude A 2 ′ of the second code stream at the receive end of the high-speed serial bus;
acquiring an amplitude A 3 of the third code stream at the transmit end of the high-speed serial bus and an amplitude A 3 ′ of the third code stream at the receive end of the high-speed serial bus;
acquiring a frequency N 1 of the first code stream, a frequency N 2 of the second code stream, and a frequency N 3 of the third code stream;
calculating a loss S 1 of the first code stream on the high-speed serial bus according to the amplitude A 1 and the amplitude A 1 ′;
calculating a loss S 2 of the second code stream on the high-speed serial bus according to the amplitude A 2 and the amplitude A 2 ′;
calculating a loss S 3 of the third code stream on the high-speed serial bus according to the amplitude A 3 and the amplitude A 3 ′; and
determining the material type of the wiring board of the high-seed serial bus according to: the frequency N 1 of the first code stream and the loss S 1 of the first code stream on the high-speed serial bus, the frequency N 2 of the second code stream and the loss S 2 of the second code stream on the high-speed serial bus, the frequency N 3 of the third code stream and the loss S 3 of the third code stream on the high-speed serial bus, and a material type characteristics table of the wiring board of the high-speed serial bus, and

wherein the material type characteristics table comprises: a correspondence among the material type of the wiring board, a loss of a transmitted signal, and a frequency of the transmitted signal.

2. The method according to claim 1 , wherein acquiring the loss of the application signal on the high-speed serial bus comprises:
acquiring a first amplitude of the application signal at the transmit end of the high-speed serial bus and a second amplitude of the application signal at the receive end of the high-speed serial bus; and
calculating the loss of the application signal on the high-speed serial bus according to the first amplitude and the second amplitude.

3. The method according to claim 1 , wherein the method further comprises acquiring the parameter configuration table, and wherein acquiring the parameter configuration table comprises:
simulating a data transmission stream by using a pseudo random binary sequence (PRBS);
testing, based on a selected frequency, a selected material type of the wiring board of the high-speed serial bus, and a selected loss of the data transmission stream on the high-speed serial bus, parameters of the high-speed serial bus;
selecting a parameter with a largest bit-error-free interval from the parameters of the high-speed serial bus as an optimal parameter;
verifying whether a margin of the optimal parameter is greater than a preset threshold;
using the optimal parameter as a verified high-speed serial bus parameter that matches the selected frequency, the selected material type of the wiring board of the high-speed serial bus, and the selected loss of the data transmission stream on the high-speed serial bus when the margin of the optimal parameter is greater than the preset threshold; and
writing the verified high-speed serial bus parameter into the parameter configuration table.

4. An apparatus for configuring a high-speed serial bus parameter, comprising:
a transmitter configured to send an application signal from a transmit end of a high-speed serial bus to a receive end of the high-speed serial bus, wherein the application signal is used to carry information about transmission data;
a processor coupled to the transmitter and configured to:
acquire a loss of the application signal on the high-speed serial bus and a material type of a wiring board of the high-speed serial bus;
acquire a frequency of the application signal according to one of a transmit rate and a receive rate of the application signal;
search a parameter configuration table for the high-speed serial bus parameter that matches all of: the frequency of the application signal, the loss of the application signal on the high-speed serial bus, and the material type of the wiring board of the high-speed serial bus, wherein the parameter configuration table comprises a correspondence between a bus parameter and a signal frequency, a signal loss, and the material type of the wiring board; and
configure the high-speed serial bus according to the high-speed serial bus parameter,

wherein the transmitter is further configured to send a first code stream, a second code stream, and a third code stream from the transmit end of the high-speed serial bus to the receive end of the high-speed serial bus,
wherein the processor is further configured to:
acquire an amplitude A 1 of the first code stream at the transmit end of the high-speed serial bus and an amplitude A 1 ′ of the first code stream at the receive end of the high-speed serial bus;
acquire an amplitude A 2 of the second code stream at the transmit end of the high-speed serial bus and an amplitude A 2 ′ of the second code stream at the receive end of the high-speed serial bus;
acquire an amplitude A 3 of the third code stream at the transmit end of the high-speed serial bus and an amplitude A 3 ′ of the third code stream at the receive end of the high-seed serial bus:
acquire a frequency N 1 of the first code stream, a frequency N 2 of the second code stream, and a frequency N 3 of the third code stream;
calculate a loss S 1 of the first code stream on the high-speed serial bus according to the amplitude A 1 and the amplitude A 1 ′;
calculate a loss S 2 of the second code stream on the high-speed serial bus according to the amplitude A 2 and the amplitude A 2 ′;
calculate a loss S 3 of the third code stream on the high-speed serial bus according to the amplitude A 3 and the amplitude A 3 ′; and
determine the material type of the wiring board of the high-speed serial bus according to: the frequency N 1 of the first code stream, the loss S 1 of the first code stream on the high-speed serial bus, the frequency N 2 of the second code stream and the loss S 2 of the second code stream on the high-speed serial bus, the

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhou Hongjun
• Rao Shuicai
• Li Jianzhao

Classifications

• G06F13/4086

  Bus impedance matching, e.g. termination · CPC title

• G06F13/4282 Primary

  on a serial bus, e.g. I2C bus, SPI bus (on daisy chain buses G06F13/4247) · CPC title

• H04L25/03885

  adaptive · CPC title

• H04L1/0001

  Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04) · CPC title

• H04L12/40169

  Flexible bus arrangements (arrangements for maintenance or administration involving management of faults; events, alarms H04L41/06; automatic restoration of network faults H04L41/0654) · CPC title