KR20040010908A - Ethernet link monitoring method for internet phone - Google Patents

Abstract

The present invention relates to a method for monitoring an Ethernet link of an Internet phone, and in particular, to monitor an abnormality of an Ethernet link in an Internet phone and to restart the operation of the Ethernet according to the monitoring result to prevent a system stoppage or a break in the Ethernet link. The purpose. To this end, the present invention is to detect the state of the physical layer chip, to modify the link information according to the detected state, to check the integrity of the transmission queue by the link information, and according to the integrity check result An Ethernet memory check step comprising reinitializing the Ethernet medium access control; And a physical link monitoring step comprising checking a state of a physical layer chip and reinitializing the physical layer chip according to the physical layer link check result. Accordingly, the present invention prevents packet loss or system stoppage due to Ethernet malfunction, thereby ensuring more reliable call quality and stability to the user.

Description

ETHERNET LINK MONITORING METHOD FOR INTERNET PHONE}

The present invention relates to an Ethernet link monitoring method of an Internet phone, and in particular, by monitoring the abnormality of the Ethernet link in the Internet phone and restarting the Ethernet operation according to the monitoring result, it is possible to prevent the system stoppage or the Ethernet link is broken. The present invention relates to an Ethernet link monitoring method of an internet phone.

In general, Internet connection methods used in Internet phones include media access control (MAC) through an RJ45 port, Ethernet connection using a physical layer chip, and PPP (Point-to-Point Protocol) connection using an RJ11 port. .

There are two types of connection method using Ethernet, and the method can be divided into a method using an external ADSL modem and a dedicated line used in most homes.

Both of the above methods must use a hardware Ethernet media access control and a physical layer chip in common in the Internet phone and transfer data using Ethernet packets.

The IEEE 802.3 standard defines a hardware and software model for a data transmission method using the Ethernet packet.

However, when data is transmitted according to the IEEE 802.3 standard, there is a limit in preventing malfunction or down of the physical layer chip due to a hardware error, and due to packet loss or dummy packet caused by an error of Ethernet media access control hardware. There is a problem that can not fundamentally prevent system malfunction caused by.

Therefore, each system development company uses various methods to solve the problems of the system error to prevent possible errors and improve the reliability of the hardware chip used in the system and the processing capability of the device driver. I'm focusing.

Hardware approaches include strengthening Electro Magnetic Compatibility (EMC) and immunity to Electro Magnetic Interference (EMI) and Electro Static Discharge (ESD).

Software approaches include the optimal design of Ethernet device drivers and the prevention of errors by monitoring programs.

Therefore, the present invention was devised in view of the necessity as described above, and it is possible to prevent malfunction or stoppage of the system by monitoring the presence or absence of an Ethernet packet in the Internet phone and appropriately adjusting the operation of the Ethernet according to the result. Its purpose is to provide an Ethernet link monitoring method for Internet phones.

In addition, the present invention provides a method for monitoring the Ethernet link of the Internet phone to check the status of the Ethernet link to prevent loss of packets transmitted and received from the personal computer in the Internet phone connected to the personal computer to prevent disconnection. There is a purpose.

Figure 1 shows the operation flow of the Ethernet memory check task of the Ethernet link monitoring method of the present invention Internet phone.

Figure 2 shows the operation of the physical link monitoring task of the Ethernet link monitoring method of the present invention Internet phone.

According to a first aspect of the invention, there is provided a method, comprising: generating a task for checking an Ethernet memory using a task delay; Detecting a state of a physical layer chip at the task; Modifying link information according to the detected state; Checking the integrity of a transmission queue based on the link information; And reinitializing the Ethernet medium access control according to the integrity check result.

According to a second aspect of the present invention, there is provided a method, comprising: generating a task for checking a physical layer link state using a task delay; Checking a state of a physical layer chip in the task; And reinitializing the physical layer chip according to the physical layer link check result.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating an operation of an Ethernet memory check task in an Ethernet link monitoring method of an Internet phone according to the present invention. As shown in FIG. Setting a; Checking the integrity of a transmission queue if there is no change in the physical link state and setting an Ethernet reset flag if there is an error; If the Ethernet reset flag is set, the step of re-initializing Ethernet medium access control will be described. An embodiment of the Ethernet memory check task according to the present invention will be described.

Create an Ethernet memory check task when initializing system hardware with the kernel loaded.

A method of generating the task is described below with reference to the following code. First, the task creation code is shown below.

int Ethertnet_check_init (void)

{

if (eth_initialized) return (ERROR);

eth_stop ();

eth_mode_set ();

if (taskSpawn ("tEthTask", 0,0,512, (FUNCPTR) eimhw_poll_link_status,

0,0,0,0,0,0,0,0,0,0) == ERROR) return (ERROR);

eth_initialized = 1;

eth_restart ();

return (OK);

}

If the Ethernet initialization variable is not set, stop the Ethernet, set the Ethernet mode, and create an Ethernet memory check task with the task creation function.

Then, set the Ethernet initialization variable to 1, restart the Ethernet, and return OK as the return value because all operations completed normally. If the task is already created or the task is not created normally, ERROR is returned as the return value.

The operation of the Ethernet memory check task is described below with reference to the following code. First, the code of the Ethernet memory check task is as follows.

void eimhw_poll_link_status ()

{

/ * read current link status from PHYs * /

new_mode = miihw_poll_link_status (eim_mcb.cur_mode);

/ * see if it changed * /

if (new_mode! = eim_mcb.cur_mode) {

/ * status changed so reset * /

do_reset = TRUE;

eim_stats.lnk_change ++;

}

else {

/ * for each link that's up check TX queue integrity * /

if (eim_mcb.cur_mode & MODE_LNKUP)

tx_queue_ok = eimhw_chk_queue ();

if (tx_queue_ok == FALSE) do_reset = TRUE;

}

if (do_reset) {

/ * reset and reconfig EIM * /

eimhw_stop ();

eimhw_reset (eim_mcb.interface);

eimhw_config (eim_mcb.cur_mode, (char *) eim_mcb.mac_addr);

eimhw_start ();

}

}

Read the current link state from the physical layer chip and store it in a mode variable. If the current mode and the mode variable do not match, the Ethernet reset flag is set to TRUE and the link state variable is increased.

On the contrary, if the current mode and the mode variable match, the internal transmission queue is checked, and if there is an error, the Ethernet reset flag is set to TRUE.

If the Ethernet reset flag is set to TRUE, the actual initialization portion of Ethernet is executed.

2 is a flowchart illustrating the operation of a physical link monitoring task of the Ethernet link monitoring method of the present invention. As shown in FIG. 2, a physical reset function is called by checking a state variable of a physical layer chip to call a physical reset function. An embodiment of a physical link monitoring task according to the present invention will be described as consisting of reinitializing a chip.

Create a physical link monitoring task when initializing system hardware with the kernel loaded.

A method of generating the task is described below with reference to the following code. First, the task creation code is shown below.

int phy_mon_init (void)

{

if (phy_mon_initialized) return (ERROR);

if (taskSpawn ("tPhyMonTask", 0,0,512, (FUNCPTR) phy_mon_task,

0,0,0,0,0,0,0,0,0,0) == ERROR)

{

printf ("Can not create PHY monitoring task. \ n");

return (ERROR);

}

phy_mon_initialized = 1;

return (OK);

}

If the Ethernet initialization variable is not set, create a physical link monitoring task with the task creation function.

After setting the Ethernet initialization variable to 1 and all the operations have been completed normally, return OK as the return value. If the task has already been created, return ERROR as the return value or if the creation of the physical link monitoring task fails, the task cannot be created and return ERROR as the return value.

The operation of the physical link monitoring task will be described with reference to the following code. First, the code of the physical link monitoring task is as follows.

void phy_mon_task (void)

{

while (1) {

if (! (eim_mcb.cur_mode & MODE_LNKUP))

miihw_phy0_reset ();

taskDelay (sysClkRateGet () * 10);

}

}

If the physical link state variable is checked and changed, the physical reset function is called to initialize the physical layer chip. After the task delay is delayed for 10 seconds, the process is repeatedly performed.

As described in detail above, the present invention prevents packet loss or system stoppage due to malfunction of Ethernet, thereby ensuring more reliable call quality and stability to the user.

In addition, the present invention continuously monitors whether an Ethernet link is broken due to a malfunction of a physical layer chip or a down due to an electric shock, thereby restoring the broken link and preventing a problem when using the Internet in a personal computer connected to an Internet phone. In addition, it is effective to improve the reliability of the Internet phone by securing more stable link quality.

Claims (1)

Detecting a state of a physical layer chip, modifying link information according to the detected state, checking integrity of a transmission queue based on the link information, and controlling Ethernet access according to the integrity check result An Ethernet memory check step comprising: reinitializing; And a physical link monitoring step comprising checking a state of a physical layer chip and reinitializing the physical layer chip according to the physical layer link check result.