WO2015143667A1

WO2015143667A1 - Transmission time delay measurement method, device and system based on docsis protocol

Info

Publication number: WO2015143667A1
Application number: PCT/CN2014/074188
Authority: WO
Inventors: 李勇
Original assignee: 华为技术有限公司
Priority date: 2014-03-27
Filing date: 2014-03-27
Publication date: 2015-10-01
Also published as: CN105612721A

Abstract

Provided are a transmission time delay measurement method, device and system based on a DOCSIS protocol. The measurement method comprises: sending, by a CMTS device, a DPV-REQ packet message to a target CM, the DPV-REQ packet message bearing and recording a start time stamp; receiving, by the CMTS device, a DPV-RSP packet message sent in response by the target CM; recording, by the CMTS device, a reception time stamp for receiving the DPV-RSP packet message; and determining, by the CMTS device, the difference between the reception time stamp and the start time stamp as a transmission time delay. By means of the embodiments of the present invention, the CMTS device can determine the time of packet message interaction between the CMTS device and the target CM according to the transmission time delay and then can track a CM having a problem of intermittent connection according to the transmission time delay, and moreover, can be applicable to all CMs without having any special requirement for CMs.

Description

Transmission delay measurement method, device and system based on DOCSIS protocol

The invention relates to the field of data transmission of a hybrid optical fiber coaxial network, in particular to a transmission delay measurement method, device and system based on the DOCSIS protocol.

Background technique

DOCSIS (Data Over Cable Service Interface Specification) is a set of high speed HFC (Hybrid Fiber-Coaxial) network developed by CableLabs, a major cable TV operator and research organization in the United States. Interface specification for two-way data service transmission. The CMTS (Cable Modem Termination System) is a headend (office) device that can be deployed at the front end of a cable TV network or an optical node in a bidirectional HFC network. The CM (Cable Modem) is a terminal device between the HFC network and the customer premises equipment. The CMTS and the CM complete the process of interactive transmission of data signals on the analog channel.

DOCSIS Ping (Packet Internet Groper, Internet Packet Finder) is a patented technology of Cisco that allows MSO (Multi-Service Operator) to operate and maintain.

DOCSIS Ping is similar to IP Ping, but DOCSIS Ping uses the flap-list technology of the MAC layer, and IP Ping is a method at the IP layer. DOCSIS Ping utilizes the RNG message for ranging as specified in the DOCSIS standard, which is a MAC layer message and does not depend on IP layer messages. That is, the CMTS periodically sends the RNG message to the CM. If the CM does not return the response message within the specified time, the CMTS records the CM into the flap-list list, and the flap-List is a tool that is included in the CMTS. For tracking CMs with intermittent connection problems. Because DOCSIS Ping can still work in response to IP Ping on the CM. And Cisco's DOCSIS Ping technology can be used on any two-way CM without any special requirements for CM. Because it uses the basic function of periodic ranging in the DOCSIS specification, it is widely used on CMTS.

However, since Cisco uses the periodic ranging in the DOCSIS standard for DOCSIS Ping, the CM that is already in the flap-List list will increase the error count. This is thinking The shortcomings of the DOCSIS Ping technology. Summary of the invention

The invention provides a transmission delay measurement method, device and system based on the DOCSIS protocol. A first aspect of the embodiments of the present invention provides a transmission delay measurement method based on the DOCSIS protocol, where the method includes:

The cable modem system CMTS device sends a DOCSIS Path Check Request DPV-REQ message to the target cable modem CM connected to the CMTS device, where the DMV-REQ message carries the CMTS device a start timestamp of the DPV-REQ message message;

Receiving, by the CMTS device, a DOCSIS path check response DPV-RSP message message of the DPV-REQ text message that is sent by the target CM;

The CMTS device records a receiving timestamp of receiving the DPV-RSP message message; the CMTS device determines that the difference between the receiving timestamp and the starting timestamp is the CMTS device and the target CM Transmission delay between.

With reference to the first aspect of the embodiments of the present invention, in a first implementation manner of the first aspect of the embodiments of the present disclosure, the receiving, by the CMTS device, the receiving timestamp of receiving the DPV-RSP packet message includes: the CMTS The device records the receiving timestamp into the DPV-RSP packet message corresponding to the receiving timestamp;

Or,

The CMTS device records the received timestamp into a database, and stores a correspondence between the received timestamp and the DPV-RSP message to the database.

With reference to the first aspect of the embodiments of the present invention, in a second implementation manner of the first aspect of the embodiments of the present invention, the cable modem terminal system CMTS device sends a DOCSIS path check request DPV-REQ to the target cable modem CM. Before the message, the message also includes:

Receiving, by the CMTS device, a registration request message sent by the CM;

The CMTS device determines at least one of the target CMs that can establish a connection relationship with the CMTS device;

Returning, by the CMTS device, the target CM to indicate that the target CM is successfully registered Responding to a message to establish a connection relationship between the CMTS device and the target CM.

With reference to the second implementation manner of the first aspect of the embodiment of the present invention, in the third implementation manner of the first aspect of the embodiment of the present invention, the target CM is multiple;

The cable modem terminal system CMTS device sends a DOCSIS Path Check Request DPV-REQ message to the target cable modem CM connected to the CMTS device, including: the CMTS device simultaneously sends the DPV-REQ message Sent to multiple of the targets

CM;

Receiving, by the CMTS device, the DOCSIS path check response of the DPV-REQ message that is sent by the target CM, the DPV-RSP message includes:

Receiving, by the CMTS device, the DPV-RSP message messages that are sent by the target CMs respectively;

The receiving, by the CMTS device, the receiving timestamp of receiving the DPV-RSP message message includes: the CMTS device separately recording the received response of each of the target CM responses

The receiving timestamp of the DPV-RSP packet message;

Determining, by the CMTS device, that the difference between the receiving timestamp and the starting timestamp is

The transmission delay between the CMTS device and the target CM is: the difference between the receiving timestamp corresponding to the message and the starting timestamp is the transmission delay between the CMTS device and the target CM .

With reference to the first aspect of the embodiments of the present invention, in a fourth implementation manner of the first aspect of the embodiments, the CMTS device determines that the difference between the received timestamp and the start timestamp is the Determining, by the CMTS device, whether the transmission delay is greater than or equal to a predetermined threshold;

If yes, the CMTS device determines that the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold is abnormally connected to the CMTS device;

If not, the CMTS device determines that the target CM corresponding to the transmission delay less than the predetermined threshold is properly connected to the CMTS device.

A second aspect of the embodiments of the present invention provides a cable modem terminal system CMTS device, which includes: a first sending unit, configured to send a DOCSIS path check request DPV-REQ message to the target cable modem CM connected to the CMTS device, where the DMV-REQ message carries the CMTS device a start timestamp of the DPV-REQ message message; a first receiving unit, configured to receive a DOCSIS path check response DPV-RSP message of the DPV-REQ message that is sent by the target CM;

a recording unit, configured to record a receiving timestamp of receiving the DPV-RSP message message, where the first determining unit is configured to determine that the difference between the receiving timestamp and the starting timestamp is the CMTS device and the The transmission delay between the target CMs.

With reference to the second aspect of the embodiments of the present invention, in a first implementation manner of the second aspect of the embodiments of the present disclosure, the recording unit includes:

a first recording module, configured to record the receiving timestamp into the DPV-RSP message message corresponding to the receiving timestamp;

Or,

And a second recording module, configured to record the received timestamp into a database, and store the correspondence between the received timestamp and the DPV-RSP message to the database.

With reference to the second aspect of the embodiments of the present invention, in a second implementation manner of the second aspect of the embodiments of the present disclosure, the method further includes:

a second receiving unit, configured to receive a registration request message sent by the CM;

a second determining unit, configured to determine at least one target CM that can establish a connection relationship with the CMTS device;

And a second sending unit, configured to return, to the target CM, a response message indicating that the target CM is successfully registered, to establish a connection relationship between the CMTS device and the target CM.

With reference to the second implementation manner of the second aspect of the embodiment of the present invention, in the third implementation manner of the second aspect of the embodiment of the present invention, the target CM is multiple;

The first sending unit is specifically configured to send the DPV-REQ message to the plurality of target CMs at the same time;

The first receiving unit is specifically configured to separately receive the DPV-RSP packet message that is sent by the target CM;

The recording unit is specifically configured to separately record the received each of the target CM responses The receiving timestamp of the DPV-RSP packet message;

The first determining unit is specifically configured to determine, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP packet message that is sent by each of the target CMs is the CMTS device and the The transmission delay between the target CMs.

With reference to the second aspect of the embodiments of the present invention, in a fourth implementation manner of the second aspect of the embodiments of the present disclosure,

a third determining unit, configured to determine whether the transmission delay is greater than or equal to a predetermined threshold; and the fourth determining unit is configured to: if the third determining unit determines that the transmission delay is greater than or equal to the predetermined threshold, Determining that the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold is abnormally connected to the CMTS device;

a fifth determining unit, configured to: if the third determining unit determines that the transmission delay is less than the predetermined threshold, determine the target CM and the corresponding to the transmission delay that is less than the predetermined threshold The CMTS device is connected properly.

A third aspect of the embodiments of the present invention provides a wired broadband network access system, comprising: the cable modem terminal system CMTS device according to any one of the second aspects of the embodiments of the present invention, and at least one cable modem CM.

A fourth aspect of the embodiments of the present invention provides a cable modem terminal system CMTS device, which includes a transmitter, a receiver, and a processor;

The transmitter is configured to perform the following operations:

Sending a DOCSIS Path Check Request DPV-REQ message to the target cable modem CM connected to the CMTS device, where the DMV-REQ message carries a message that the CMTS device sends the DPV-REQ message Start timestamp;

The receiver is configured to perform the following operations:

Receiving, by the target CM, a DOCSIS path check response of the DPV-REQ message to respond to a DPV-RSP message;

The processor is configured to perform the following operations:

Recording a receiving timestamp of receiving the DPV-RSP message message;

Determining a difference between the receiving timestamp and the starting timestamp is a transmission delay between the CMTS device and the target CM. With reference to the fourth aspect of the embodiments of the present invention, in a first implementation manner of the fourth aspect of the embodiments, the processor is specifically configured to perform the following operations:

Recording the received timestamp into the DPV-RSP message message corresponding to the received timestamp;

Or,

Recording the received timestamp into the database, and storing the correspondence between the received timestamp and the DPV-RSP message message into the database.

With reference to the fourth aspect of the embodiments of the present invention, in a second implementation manner of the fourth aspect of the embodiments of the present disclosure, the receiver is specifically configured to perform the following operations:

Receiving a registration request message sent by the CM;

The processor is specifically configured to perform the following operations:

Determining at least one of the target CMs that can establish a connection relationship with the CMTS device;

The transmitter is specifically configured to perform the following operations:

A response message indicating that the target CM registration is successful is returned to the target CM to establish a connection relationship between the CMTS device and the target CM.

With reference to the second implementation manner of the fourth aspect of the embodiment of the present invention, in the third implementation manner of the fourth aspect of the embodiment of the present invention, the target CM is multiple;

The transmitter is specifically configured to perform the following operations:

Sending the DPV-REQ message to the plurality of target CMs at the same time;

The receiver is specifically configured to perform the following operations:

Receiving, respectively, the DPV-RSP text messages that are sent by the target CM;

The processor is specifically configured to perform the following operations:

Recording, respectively, a received timestamp of the received DPV-RSP message that is sent by each of the target CMs;

Determining, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP text message that is sent by each of the target CMs is the transmission time between the CMTS device and the target CM Delay.

With reference to the fourth aspect of the embodiments of the present invention, in a fourth implementation manner of the fourth aspect of the embodiments, the processor is specifically configured to perform the following operations: Determining whether the transmission delay is greater than or equal to a predetermined threshold;

If it is determined that the transmission delay is greater than or equal to the predetermined threshold, determining that the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold is abnormally connected to the CMTS device; If the transmission delay is less than the predetermined threshold, it is determined that the target CM corresponding to the transmission delay less than the predetermined threshold is properly connected to the CMTS device.

The present invention provides a method and a device for measuring a transmission delay based on the DOCSIS protocol, the method comprising: the CMTS transmitting a DPV-REQ message to a target CM connected to the CMTS, and carrying the DPV-REQ message Recording a start timestamp, the CMTS receives a DPV-RSP message sent by the target CM, and records a receiving timestamp of receiving the DPV-RSP message, and the CMTS device determines the receiving The difference between the timestamp and the start timestamp is a transmission delay between the CMTS device and the target CM. The embodiment of the present invention enables the CMTS to determine the time for the message exchange between the CMTS and the target CM according to the determined transmission delay, and then track the intermittent connection according to the transmission delay. The problematic CM, without the use of the flap-list list, eliminates the need to add erroneous counts to CMs with intermittent connection problems. DRAWINGS

1 is a flow chart of a preferred embodiment of a method for measuring a transmission delay based on a DOCSIS protocol according to an embodiment of the present invention;

2 is a flow chart of another preferred embodiment of a method for measuring a transmission delay based on a DOCSIS protocol according to an embodiment of the present invention;

3 is a flow chart of another preferred embodiment of a method for measuring a transmission delay based on a DOCSIS protocol according to an embodiment of the present invention;

4 is a flow chart of another preferred embodiment of a method for measuring a transmission delay based on a DOCSIS protocol according to an embodiment of the present invention;

FIG. 5 is a flow chart of another preferred embodiment of a method for measuring a transmission delay based on a DOCSIS protocol according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present disclosure;

8 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

10 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present disclosure;

13 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

14 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of another preferred embodiment of a cable modem terminal system CMTS device according to an embodiment of the present invention. detailed description

A method for measuring transmission delay based on the DOCSIS protocol provided by the embodiment of the present invention is described in detail below with reference to FIG. 1 :

First of all, it should be clarified that the embodiment of the present invention is applied to a wired broadband network access system, which is designed based on the DOCSIS standard. The system is mainly composed of a front-end device cable modem system equipment CMTS ( Cable Modem). Termination System (hereinafter referred to as CMTS device) and user equipment cable modem (Cable Modem, hereinafter referred to as CM). The CM is generally placed in the user's home. As a terminal device, the CM is connected to the WAN through the CMTS device.

101. The CMTS device sends a DOCSIS path check request to the target CM (DOCSIS Path) Verify Request, DPV-REQ) message message;

The CMTS device determines that the CM with which the normal communication channel is established is the target CM, and establishes a normal communication channel to enable the CMTS device to exchange message messages with the target CM.

In this embodiment, the DPV message is used to determine the time of the message exchange between the CMTS device and the CM.

Specifically, the DPV packet message is specified in the DOCSIS standard, and is a MAC layer management message, and does not depend on an IP layer message. And the DPV message message is used to test the delay between the CMTS device and the CM, and the type values are 39 and 40. The specific structure of the DPV packet message is as shown in the prior art, and is not mentioned in this embodiment.

The CMTS device transmits a DPV-REQ message message (DOCSIS Path Check Request message) having a type value of 39 to the target CM.

The CMTS device records the start timestamp of the DPV-REQ message sent in the DPV-REQ message, so that the DPV-REQ message bearer records the start timestamp.

102. The CMTS device receives a DOCSIS Path Verify Response (DPV-RSP) message message of the DPV-REQ text message that is sent by the target CM.

That is, the CMTS device sends the DPV-REQ message to the target CM, so that the target CM responds to the DPVSIS path check response DPV-RSP with a type value of 40 according to the DPV-REQ message. Text message.

103. The CMTS device records a receiving timestamp of receiving the DPV-RSP message, and the CMTS device receives the DPV-RSP text message that is sent by the target CM, and records the received DPV-RSP message. Receive timestamp.

104. The CMTS device determines that a difference between the receiving timestamp and the starting timestamp is a transmission delay between the CMTS device and the target CM.

The start time stamp recorded by the CMTS device is recorded in the DPV-RSP packet message received by the CMTS device, and the CMTS device records the received DPV-RSP packet message. Receiving a timestamp, wherein the CMTS device calculates the receiving timestamp and the time for the CMTS device to determine a time for the message message interaction between the CMTS device and the target CM The difference between the start timestamps.

Determining, by the CMTS device, a difference between the receiving timestamp and the starting timestamp as a transmission delay between the CMTS device and the target CM, so that the CMTS device according to the transmission delay The time at which the message message interaction with the target CM can be determined can be determined.

In this embodiment, the CMTS device determines, between the CMTS device and the CM, by using a DPV message (including DPV-REQ and DPV-RSP) for testing delay between the CMTS device and the CM in a management message of the MAC layer. The time when the message is exchanged, because the DPV message is a MAC layer message, so that the CM still works without being able to respond to IP Ping. And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DPV message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any special for the CM. The requirements are applicable on all CMs.

The embodiment shown in FIG. 1 describes the transmission delay measurement method based on the DOCSIS protocol in detail. The following describes the CMTS device records the reception timestamp in conjunction with the embodiment shown in FIG. 2: 201. The CMTS device sends the target CM to the target CM. DPV-REQ message message;

The specific process of step 201 in this embodiment is shown in step 101 shown in FIG. 1, which is not described in this embodiment.

202. The CMTS device receives a DPV-RSP text message of the DPV-REQ text message that is sent by the target CM.

When the target CM responds to the DPV-REQ message, the identifier field may be added to the DPV-REQ message, so that the CMTS device can determine to send the DPV-RSP packet according to the identifier field. The target CM of the message.

The target CM that the CMTS device can determine is one or more.

203. The CMTS device records a receiving timestamp of receiving the DPV-RSP packet message. In this embodiment, the method for recording the receiving timestamp may be of two types:

For example, the CMTS device records the receiving timestamp into the DPV-RSP message message corresponding to the receiving timestamp.

That is, after receiving the DPV-REQ message of the determined target CM response, the CMTS device determines the receiving timestamp of receiving each DPV-REQ message, and records the receiving timestamp to the corresponding DPV-REQ. In the message message. Therefore, the CMTS device can obtain the receiving timestamp and the starting timestamp that have been recorded in the DPV-REQ message by reading the DPV-REQ message.

The second is that the CMTS device records the reception time stamp into a database.

After the CMTS device receives the DPV-REQ message from the target CM, it determines the receiving timestamp of receiving the DPV-REQ message, and establishes the receiving timestamp and the DPV-REQ message. Correspondence.

The manner in which the CMTS device establishes the correspondence between the received timestamp and the DPV-REQ message is not limited in this embodiment, and the CMTS device may determine the receiving timestamp by using the corresponding relationship. The corresponding DPV-REQ message may be sent. For example, after receiving the DPV-REQ message, the CMTS device adds an identifier field to the DPV-REQ message, and determines to receive the DPV-REQ message. The same identifier field is added to the receiving timestamp of the text message, so that the CMTS device determines the correspondence between the same DPV-REQ message and the receiving timestamp of the identifier field.

The CMTS device stores its determined reception timestamp and the established reception timestamp with the CM corresponding to the DPV-RSP message to be stored in the database. The CMTS device can determine the receiving timestamp and the DPV-REQ message corresponding to the receiving timestamp by reading the database, and then determining the target CM that sends the DPV-REQ message.

It should be clarified that the manner in which the CMTS device records the received timestamp is described as an example. The specific recording mode is not limited in this embodiment, as long as the CMTS device can obtain the receiving timestamp and corresponding to the receiving timestamp. The target CM is OK, and in the embodiment, the CMTS device preferably records the receiving time stamp into the corresponding DPV-REQ message, because the storage space can be saved, and the CMTS device directly The DPV-REQ message is read to determine the receiving timestamp and the corresponding target CM.

204. The CMTS device determines that a difference between the receiving timestamp and the starting timestamp is a transmission delay between the CMTS device and the target CM.

That is, if the CMTS device records the received timestamp into the DPV-RSP message, the CMTS device reads the DPV-RSP message and obtains the record of the DPV-RSP message. Determining a start timestamp and the receiving timestamp, and determining a target CM that sends the DPV-RSP message. The CMTS device, in turn, determines that the difference between the receive timestamp and the start timestamp is a transmission delay between the CMTS device and the target CM.

And if the CMTS device records the receiving time stamp into a database, the CMTS device reads the database, acquires a receiving timestamp from the database, and determines a DPV-RSP message corresponding to the receiving timestamp. Determining, from the DPV-RSP message, the start timestamp recorded in the DPV-RSP message, and determining a target CM that sends the DPV-RSP message.

The CMTS device, in turn, determines that the difference between the receive timestamp and the start timestamp is a transmission delay between the CMTS device and the target CM.

In this embodiment, the CMTS device determines at least one target CM, and sends a DPV-REQ message with the start timestamp recorded to each target CM, and the CMTS device receives the DP V-REQ message that the target CM responds to. And receiving, by the message, the receiving timestamps of the received DPV-RSP message messages into the respective DPV-REQ message messages or in the database, so that the CMTS device determines the receiving timestamp and the starting time. The difference in stamp is the transmission delay between the CMTS device and the target CM. With this embodiment, the CMTS device can determine a DPV-REQ text message corresponding to each target CM, and determine a transmission delay according to the DPV-REQ text message.

The embodiment shown in FIG. 1 illustrates a method for measuring a transmission delay based on the DOCSIS protocol. The embodiment shown in FIG. 2 illustrates how the CMTS device records the reception time stamp. The following is described in conjunction with the embodiment shown in FIG. 3. How does the CMTS device determine the target CM:

301. The CMTS device receives a registration request message sent by the CM.

That is, after the CM is powered on, the downlink frequency is automatically searched to determine the uplink channel, and the configuration file parameters are obtained, so that the CM performs corresponding configuration and work according to the profile parameters obtained by the CM.

The CM sends a registration request message including the profile parameter to the CMTS device through the uplink channel, so that the CMTS device receives the registration request message.

The manner in which the CM obtains the configuration file parameter and the parameter type specifically included in the configuration file parameter are prior art, and are not mentioned in this embodiment.

302. The CMTS device determines the target that can establish a connection relationship with the CMTS device.

CM; The registration process in this embodiment is actually a process for the CMTS device to manage the CM. After the CMTS device receives the configuration file parameters carried in the registration request message, the CMTS device authenticates the configuration file parameters, if the CMTS device determines the If there is no problem with the line between the CMs, and the profile parameters meet the requirements, the CMTS device determines the CM as the target CM.

Thereby the CMTS device is enabled to monitor the status of the target CM at any time.

The number of the target CMs that can be determined by the CMTS device is one or more. In this embodiment, the target CM determined by the CMTS device is taken as an example for description.

303. The CMTS device returns a response message to the target CM, to establish a connection relationship between the CMTS device and the target CM.

After the CMTS device determines the target CM, a response message indicating that the target CM is successfully registered is returned to the determined target CM.

After the CMTS device sends the response message, the connection relationship between the CMTS device and the target CM can be successfully established.

304. The CMTS device sends a DPV-REQ message to the target CM.

The target CM device sends a DPV-REQ message to a determined target CM. For the specific sending process, please refer to step 101 of the embodiment shown in FIG. 1, which is not mentioned in this embodiment.

305. The CMTS device receives a DPV-RSP text message of the DPV-REQ text message that is sent by the target CM.

For the specific process of the CMTS device receiving the DPV-RSP packet message, please refer to step 102 shown in Figure 1, which is not described in this embodiment.

306. The CMTS device records the receiving timestamp of receiving the DPV-RSP packet message. The step 306 is the same as the step 203 shown in FIG. 2, and is not described in this embodiment.

307. The CMTS device determines that a difference between the receiving timestamp and the starting timestamp is a transmission delay between the CMTS device and the target CM.

The CMTS device can determine the transmission delay corresponding to the target C M by reading the DPV-REQ message or the database storing the received time stamp.

For the specific process, please refer to step 204 shown in FIG. 2, which is not mentioned in this embodiment.

In this embodiment, the CMTS device determines, according to the registration request message sent by the CM, The target CM is connected to the CMTS to enable the CMTS device to monitor the status of the target CM at any time, so that the operation and maintenance personnel can grasp the status of the target CM at any time through the monitoring of the CMTS device, thereby facilitating maintenance. In the embodiment, the CMTS device determines that the target CM is one, and the CMTS device can determine the transmission delay between the CMTS device and the target CM by using a unicast manner. And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DPV message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any special for the CM. The requirements are applicable on all CMs, making this embodiment widely available on the CMTS.

The embodiment shown in FIG. 3 illustrates how the CMTS device determines the target CM, and if the target CM determined by the CMTS device is one, how the CMTS device implements unicast; the following embodiment is combined with the embodiment shown in FIG. Explain how the CMTS device implements multicast if the target CM determined by the CMTS device is multiple:

401. The CMTS device receives a registration request message sent by the CM.

The step 301 in this embodiment is the same as the step 201 shown in FIG. 2, and details are not described herein again. 402. The CMTS device determines the target that can establish a connection relationship with the CMTS device.

CM;

In the embodiment, the process of determining the target CM by the CMTS device is the same as the process of step 302 shown in FIG. 3, and details are not described herein again.

In this embodiment, the number of the target CMs determined by the CMTS device is multiple. 403. The CMTS device returns a response message to the target CM, to establish a connection relationship between the CMTS device and the target CM.

After the CMTS device determines the plurality of target CMs, the response message for indicating that the target CM is successfully registered is returned to the determined target CM.

After the CMTS device sends the response message, the connection relationship between the CMTS device and the plurality of target CMs can be successfully established.

404, the CMTS device sends the DPV-REQ message to the plurality of target CMs at the same time;

In order for the CMTS device to be able to test the time of its interaction with the message messages of the plurality of target CMs respectively, the CMTS device will be used to test the delay between the CMTS device and the CM. The DPV-REQ message of the late message is simultaneously sent to a plurality of the target CMs, respectively.

The DPV-REQ message message bearer sent by the CMTS device simultaneously records the start timestamp.

For the specific structure and function of the DPV-REQ packet message, please refer to step 101 shown in FIG. 1 , which is not described in this embodiment.

405. The CMTS device receives the DPV-RSP packet message that is sent by the target CM.

The CMTS device sends the DPV-REQ message to the plurality of target CMs respectively, so that each of the target CMs responds to the DOCSIS path check response DPV with a type value of 40 according to the DPV-REQ message. - RSP message.

406. The CMTS device records, respectively, a received timestamp of the received DPV-RSP packet message that is sent by each of the target CMs.

The CMTS device respectively receives a DPV-RSP message message that is sent by the target CM. The receiving timestamp of the message, wherein the CMTS device specifically records the receiving timestamp, as shown in FIG. 2, step 203, which is not described in this embodiment.

407. The CMTS device determines, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP packet message that is sent by each of the target CMs is the CMTS device and the target CM. The transmission delay between.

The CMTS device determines a receiving timestamp corresponding to each DPV-RSP message message, and a starting timestamp recorded in each DPV-RSP message.

In order for the CMTS device to determine the time of the message exchange between the CMTS device and the CM, the CMTS device separately calculates the difference between the received timestamp and the start timestamp.

Determining, by the CMTS device, a difference between the receiving timestamp and the starting timestamp as a transmission delay, so that the CMTS device can determine, according to the transmission delay, the message message interaction between the CMTS and the CM. time.

In this embodiment, the CMTS device determines, according to the registration request message sent by the CM, a plurality of target CMs that can establish a connection relationship with the CMTS, so that the CMTS device can monitor the status of multiple target CMs at any time, so that the operation is performed. Maintenance personnel can monitor multiple CMTS devices simultaneously The status of the target CM, which in turn facilitates maintenance. In the embodiment, the CMTS device determines that the target CM is multiple, and the CMTS device can determine the transmission delay between the CMTS device and the target CM by using a multicast manner. For the multicast mode provided in this embodiment, the CMTS device sends a DPV-REQ message to enable multiple target CMs to receive, and multiple target CMs return DPV-RSP to the CMTS device. A message message, which is equivalent to the CMTS device being able to perform DOCSIS ping on multiple target CMs at the same time. This embodiment enables the operation and maintenance personnel to simultaneously detect the operation of each CM and quickly diagnose the cause of the fault on the CMTS device. And positioning.

The embodiment shown in FIG. 1 to FIG. 4 illustrates the transmission delay measurement method based on the DOCSIS protocol. The following describes how to determine according to the embodiment shown in FIG. 1 to FIG. The transmission delay determines the connection status of the target CM:

This embodiment is described by taking the embodiment shown in FIG. 4 as an example. It should be clarified that the embodiment can be applied to any one of FIG. 1 to FIG. 4, and the embodiment shown in FIG. Any of the embodiments shown in FIG. 4 is combined to determine that the connection state of the target CM is the protection content of the embodiment.

501. The CMTS device receives a registration request message sent by the CM.

502. The CMTS device determines the target that can establish a connection relationship with the CMTS device.

CM;

503. The CMTS device returns a response message to the target CM, to establish a connection relationship between the CMTS device and the target CM.

504, the CMTS device sends the DPV-REQ message to the plurality of target CMs at the same time;

505. The CMTS device receives the DPV-RSP packet message that is sent by the target CM.

506. The CMTS device records, respectively, a received timestamp of the received DPV-RSP packet message that is sent by each of the target CMs.

507. The CMTS device determines, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP packet message that is sent by each of the target CMs is the CMTS device and the target CM. The transmission delay between

The process shown in steps 501 to 507 shown in this embodiment is the same as the process shown in FIG. The process to step 407 is the same, and no comment is made in this embodiment.

508, the CMTS device determines whether the transmission delay is greater than or equal to a predetermined threshold, if yes, proceed to step 509, and if not, proceed to step 510;

The predetermined value is a custom setting of the operation and maintenance personnel, and the specific value is not limited in this embodiment.

509. The CMTS device determines that the target CM corresponding to the transmission delay that is greater than or equal to the predetermined threshold is abnormally connected to the CMTS device.

That is, if the CMTS device determines that the transmission delay is greater than or equal to the predetermined threshold, the connection between the target CM corresponding to the transmission delay and the CMTS device is abnormal, so that the operation and maintenance personnel can determine The target CM may be a registration in progress, or an abnormality occurs in a communication channel between the CMTS device and the target CM.

510. The CMTS device determines that the target CM corresponding to the transmission delay that is less than the predetermined threshold is properly connected to the CMTS device.

That is, if the CMTS device determines that the transmission delay is less than the predetermined threshold, it indicates that the connection between the target CM corresponding to the transmission delay and the CMTS device is normal, and the CMTS device and the The communication channel between the target CMs is normal.

The CMTS device can determine whether each of the target CMs is normally connected to the CMTS device according to the predetermined threshold according to the determined transmission delay, so that the CMTS device can be monitored at any time. The connection status of each of the target CMs, in turn, can track the target CM with connection problems, and this embodiment can be used on any bidirectional CM without any special requirements for the CM because it uses the periodicity of the standard in the DOCSIS specification. The basic function of ranging is widely used on CMTS.

The embodiments shown in FIG. 1 to FIG. 5 describe the transmission delay measurement method based on the DOCSIS protocol and how to determine the connection status of the target CM. The following specific application scenarios are further described in detail:

In the wired broadband network access system, after the CM is powered on, the CM automatically searches for the downlink frequency to determine the uplink channel, and obtains the configuration file parameters for normal operation;

The CM sends a registration request message including the configuration file parameter to the CMTS device through the uplink channel; Receiving, by the CMTS device, the registration request message;

The CMTS device authenticates the configuration file parameter. If the CMTS device determines that there is no problem with the line between the CMTS and the CM, and the configuration file parameter meets the requirement, the CMTS device determines the CM as the target CM;

In this application scenario, the CMTS device determines three target CMs as an example for description;

That is, the three target CMs determined by the CMTS device are the first target CM, the second target CM and the third target CM;

The CMTS device returns a response message to the target CM to establish a connection relationship between the CMTS device and the first target CM, the second target CM, and the third target CM, respectively;

The CMTS device simultaneously sends a DPV-REQ message with a type value of 39 to a plurality of target CMs;

The CMTS device records the start timestamp of the DPV-REQ message sent in the DPV-REQ message.

That is, in the application scenario, the CMTS device simultaneously targets the first target CM, the second target

The start timestamp recorded in the DPV-REQ message sent by the CM and the third target CM is 10:00;

The first target CM, the second target CM, and the third target CM respectively receive DPV-REQ message messages;

The first target CM, the second target CM, and the third target CM respectively respond to the DOCSIS path check response DPV-RSP message message with a type value of 40 according to the DPV-REQ message, and the CMTS device receives the message respectively. The DPV-RSP message of the first target CM, the second target CM, and the third target CM;

The CMTS device determines the receiving timestamp of receiving each DPV-RSP message, and the CMTS device may record the received timestamp into a corresponding DPV-RSP message, or record it in a database;

In this application scenario, it is preferable that the CMTS device records the receiving timestamps of the received DPV-RSP packet messages into the DPV-RSP packet messages, respectively.

That is, in this application scenario, the CMTS device will receive the first sent by the first target CM. The receiving timestamp 10:08 of the DPV-RSP message is recorded in the first DPV-RSP message returned by the first target CM;

The CMTS device records the receiving time stamp 10:05 of the second DPV-RSP message sent by the second target CM to the second DPV-RSP message returned by the second target CM; The CMTS device records the receiving time stamp 10:02 of the third DPV-RSP message sent by the third target CM into the third DPV-RSP message returned by the third target CM; the CMTS device Determining that the transmission delay of the first target CM is 10:08-10:00=0.08S; the CMTS device determines that the transmission delay of the second target CM is 10:05-10:00=0.05S; The CMTS device determines that the transmission delay of the third target CM is 10:02-10:00=0.02S; the operation and maintenance personnel can determine whether the connection status of each target CM is normal according to each transmission delay;

In this application scenario, it is preferred that the CMTS device separately determines whether each transmission delay is greater than or equal to a predetermined threshold;

In this application scenario, the predetermined threshold value determined by the CMTS device is 0.06 S;

Determining, by the CMTS device, that the transmission delay of the first target CM is greater than a predetermined threshold

0.06 S, the CMTS device determines that the first target CM connection is abnormal, and the first target CM may be normally registered or its communication channel established with the CMTS device is faulty;

The CMTS device notifies the operation and maintenance personnel that the first target CM connection is abnormal;

The CMTS device determines that the transmission delay of the second target CM is less than a predetermined threshold

0.06 S, the CMTS device determines that the second target CM connection is normal;

And the CMTS device notifies the operation and maintenance personnel that the second target CM is connected normally;

Determining, by the CMTS device, that the transmission delay 0.02S of the third target CM is less than a predetermined threshold value 0.06 S, the CMTS device determines that the third target CM connection is normal;

The CMTS device notifies the operation and maintenance personnel that the third target CM is connected normally.

The specific structure of the cable modem terminal system CMTS device provided by the embodiment of the present invention is described in detail below with reference to FIG. 6 : The CMTS device in this embodiment specifically includes:

a first sending unit 601, configured to send a DOCSIS Path Check Request (DPV-REQ) message to the target cable modem CM connected to the CMTS device, where the bearer record is sent by the CMTS device in the DPV-REQ message a start timestamp of the DPV-REQ message, the first receiving unit 602, configured to receive a DOCSIS path check response DPV-RSP message of the DPV-REQ message that is sent by the target CM;

a recording unit 603, configured to record a receiving timestamp of receiving the DPV-RSP message message, where the first determining unit 604 is configured to determine that the difference between the receiving timestamp and the starting timestamp is the CMTS device The transmission delay between the target CM and the target.

In this embodiment, the first determining unit 604 is used for testing in the management message of the MAC layer.

The delayed DPV message between the CMTS device and the CM determines the time of the message exchange between the CMTS device and the CM, because the DPV message is a MAC layer message, so that the CM still works without responding to the IP Ping. . And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DPV message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any special for the CM. The requirements are applicable on all CMs.

FIG. 6 is a detailed description of the specific structure of the cable modem terminal system CMTS device provided by the embodiment of the present invention. The specific structure of the CMTS device that can record the time stamp is described below with reference to the embodiment shown in FIG.

The CMTS device in this embodiment specifically includes:

a first sending unit 701, configured to send a DOCSIS Path Check Request (DPV-REQ) message to the target cable modem CM connected to the CMTS device, where the bearer record is sent by the CMTS device in the DPV-REQ message a start timestamp of the DPV-REQ message, the first receiving unit 702, configured to receive a DOCSIS path check response DPV-RSP message of the DPV-REQ message that is sent by the target CM;

a recording unit 703, configured to record a receiving timestamp of receiving the DPV-RSP message message, where the first determining unit 704 is configured to determine that the difference between the receiving timestamp and the starting timestamp is the CMTS device a transmission delay between the target CM;

The recording unit 703 specifically includes: The first recording module 7031 is configured to record the receiving timestamp into the DPV-RSP message message corresponding to the receiving timestamp;

Or,

The second recording module 7032 is configured to record the received timestamp into a database, and store the correspondence between the received timestamp and the DPV-RSP message to the database.

In this embodiment, the first sending unit 701 of the CMTS device determines at least one target CM, and sends a DPV-REQ message message recorded with a start time stamp to each target CM, and the first receiving unit 702 of the CMTS device receives The DPV-REQ message sent by the target CM, the first recording module 7031 of the recording unit 703 records the received timestamp of each DPV-RSP message to each DPV-REQ message or the second. The recording module 7032 records the receiving time stamp into the database, so that the first determining unit 704 determines that the difference between the receiving time stamp and the starting time stamp is a transmission between the CMTS device and the target CM. Delay. The DPV-REQ message is used to determine the transmission delay by this embodiment.

FIG. 6 is a detailed description of a specific structure of a cable modem terminal system CMTS device according to an embodiment of the present invention. The embodiment shown in FIG. 7 illustrates a specific structure of a CMTS device that can record a time stamp, which is shown in FIG. The embodiment illustrates a specific structure of a CMTS device that can determine a target CM;

The CMTS device in this embodiment specifically includes:

a second receiving unit 801, configured to receive a registration request message sent by the CM;

a second determining unit 802, configured to determine at least one target CM that can establish a connection relationship with the CMTS device;

The second determining unit 802 can determine the target CM as one or more. In the embodiment, the second determining unit 802 determines that the target CM is one.

a second sending unit 803, configured to return, to the target CM, a response message indicating that the target CM is successfully registered, to establish a connection relationship between the CMTS device and the target CM;

a first sending unit 804, configured to send a DOCSIS Path Check Request (DPV-REQ) message to the target cable modem CM connected to the CMTS device, where the bearer record is sent by the CMTS device in the DPV-REQ message a start timestamp of the DPV-REQ message message; a first receiving unit 805, configured to receive a DOCSIS path check response DPV-RSP message of the DPV-REQ message that is sent by the target CM;

a recording unit 806, configured to record a receiving timestamp of receiving the DPV-RSP message message, where the first determining unit 807 is configured to determine that the difference between the receiving timestamp and the starting timestamp is the CMTS device The transmission delay between the target CM and the target.

The recording unit 806 specifically includes:

The first recording module 8061 is configured to record the receiving timestamp into the DPV-RSP message message corresponding to the receiving timestamp.

Or,

The second recording module 8062 is configured to record the received timestamp into a database, and store the correspondence between the received timestamp and the DPV-RSP message to the database.

In this embodiment, the second determining unit 802 determines, according to the registration request message sent by the CM, a target CM that can establish a connection relationship with the CM, so that the CMTS device can monitor the status of the target CM at any time, so that operation and maintenance are performed. The personnel can grasp the status of the target CM at any time through the monitoring of the CMTS equipment, thereby facilitating maintenance. In this embodiment, the second determining unit 802 determines that the target CM is one, and the second sending unit 803 establishes a connection relationship between the CMTS device and the target CM by using a unicast manner, so that the first determining unit 807 can determine the transmission delay between the CMTS device and the target CM. And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DPV message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any special for the CM. The requirements are applicable on all CMs, making this embodiment widely available on CMTS.

The embodiment shown in Fig. 8 illustrates the specific structure of the CMTS device that can determine the target CM; the specific structure in which the multicast CMTS device can be implemented is described below in conjunction with the embodiment shown in FIG.

The CMTS device in this embodiment specifically includes:

The second receiving unit 901 is configured to receive a registration request message sent by the CM.

a second determining unit 902, configured to determine at least one target CM that can establish a connection relationship with the CMTS device;

The second determining unit 902 can determine the target CM as one or more. In the embodiment, the second determining unit 902 determines that the target CM is multiple. a second sending unit 903, configured to return, to the target CM, a response message indicating that the target CM is successfully registered, to establish a connection relationship between the CMTS device and the target CM;

The first sending unit 904 is configured to separately send the DPV-REQ message to the plurality of target CMs;

The first receiving unit 905 is configured to receive, by the plurality of the DPV-RSP message messages that are sent by the target CM, respectively.

The recording unit 906 records the received timestamp of the received DPV-RSP message that is sent by each of the target CMs.

The first determining unit 907 is configured to determine, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP packet message that is sent by each of the target CMs is the CMTS device and the The transmission delay between the target CMs;

The recording unit 906 specifically includes:

The first recording module 9061 is configured to record the receiving timestamp into the DPV-RSP message message corresponding to the receiving timestamp.

Or,

The second recording module 9062 is configured to record the receiving timestamp into a database, and store the correspondence between the receiving timestamp and the DPV-RSP message message into the database.

In this embodiment, the second determining unit 902 determines, according to the registration request message sent by the CM, a plurality of target CMs that can establish a connection relationship with the CM, so that the CMTS device can monitor the status of multiple target CMs at any time, so that Operation and maintenance personnel can monitor the status of multiple target CMs simultaneously through the CMTS equipment, which is convenient for maintenance. In the embodiment, the second determining unit 902 determines that the target CM is multiple, and the first sending unit 904 separately sends the DPV-REQ message to the plurality of the multicast messages in a multicast manner. The target CM may cause the first determining unit 907 to determine the transmission delay between the CMTS device and the target CM. For the multicast mode provided in this embodiment, the first sending unit 904 sends a DPV-REQ message to enable multiple target CMs to receive, and multiple target CMs give the first receiving. The unit 905 returns a DPV-RSP message, which is equivalent to the CMTS device being able to perform DOCSIS ping on multiple target CMs at the same time. This embodiment enables the operation and maintenance personnel to simultaneously detect the running and fast of each CM on the CMTS device. Diagnose and locate the cause of the failure. The embodiment shown in FIG. 6 to FIG. 9 illustrates the specific structure of the CMTS device. The specific structure of the CMTS device that can determine the connection state of the target CM according to the determined transmission delay is described below with reference to the embodiment shown in FIG. :

The CMTS device in this embodiment specifically includes:

The second receiving unit 1001 is configured to receive a registration request message sent by the CM.

a second determining unit 1002, configured to determine at least one target CM that can establish a connection relationship with the CMTS device;

The second determining unit 1002 may determine one or more target CMs. In the embodiment, the second determining unit 1002 determines that the target CM is multiple.

a second sending unit 1003, configured to return a response message indicating that the target CM is successfully registered to the target CM, to establish a connection relationship between the CMTS device and the target CM, where the first sending unit 1004 is configured to: Sending the DPV-REQ message messages to multiple target CMs at the same time;

The first receiving unit 1005 is configured to receive, by the plurality of the DPV-RSP message messages that are sent by the target CM, respectively.

a recording unit 1006, configured to separately record a received timestamp of the received DPV-RSP message that is sent by each of the target CMs;

a first determining unit 1007, configured to determine, respectively, that the difference between the receiving timestamp and the starting timestamp corresponding to the DPV-RSP message message that is sent by each of the target CMs is the CMTS device and the The transmission delay between the target CMs;

The third determining unit 1008 is configured to determine whether the transmission delay is greater than or equal to a predetermined threshold. The fourth determining unit 1009 is configured to: if the third determining unit 1008 determines that the transmission delay is greater than or equal to the predetermined a threshold value, determining that the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold is abnormally connected to the CMTS device;

a fifth determining unit 1010, configured to determine, if the third determining unit 1008 determines that the transmission delay is less than the predetermined threshold, determining the target CM corresponding to the transmission delay that is less than the predetermined threshold The connection with the CMTS device is normal.

The recording unit 1006 specifically includes:

a first recording module 10061, configured to record the receiving timestamp to the receiving timestamp pair In the DPV-RSP message message that should be;

Or,

The second recording module 10062 is configured to record the received timestamp into a database, and store the correspondence between the received timestamp and the DPV-RSP message to the database.

In this embodiment, the fourth determining unit 1009 may determine that the third determining unit 1008 determines that the transmission is greater than or equal to the predetermined threshold if the transmission delay is greater than or equal to the predetermined threshold. The target CM corresponding to the delay is abnormally connected to the CMTS device; the fifth determining unit 1010 may determine that if the third determining unit 1008 determines that the transmission delay is less than the predetermined threshold, determining and less than the said The target CM corresponding to the transmission delay of the predetermined threshold is normally connected to the CMTS device. In order to enable the CMTS device to monitor the connection status of each of the target CMs at any time, thereby tracking the target CM having the connection problem, and the embodiment can be used on any bidirectional CM without any special requirements for the CM, because It uses the basic function of periodic ranging as standard in the DOCSIS specification, so it is widely used on CMTS.

The embodiment of the present invention further provides a wired broadband network access system, which includes the cable modem terminal system CMTS device described in any one of the embodiments shown in FIG. 6 to FIG. , and at least one cable modem CM.

The specific structure of the CMTS device is described in detail in the embodiment shown in FIG. 6 to FIG. 10. The following is a specific application scenario to further describe the structure of the CMTS device:

The CM sends a registration request message including the configuration file parameter to the CMTS device through the uplink channel;

The CMTS device specifically includes: a second receiving unit 1001, a second determining unit 1002, a second sending unit 1003, a first sending unit 1004, a first receiving unit 1005, a recording unit 1006, a first determining unit 1007, and a a third determining unit 1008, a fourth determining unit 1009, and a fifth determining unit 1010;

The second receiving unit 1001 of the CMTS device receives the registration request message;

The second determining unit 1002 of the CMTS device authenticates the profile parameter. If the second determining unit 1002 determines that there is no problem with the line between the CMTS and the CM, and the profile parameter meets the requirements, Then the second determining unit 1002 determines the CM as the target CM;

In the application scenario, the third determining unit 1002 determines three target CMs as an example for description;

That is, the three target CMs determined by the second determining unit 1002 are the first target CM, the second target CM and the third target CM;

The second sending unit 1003 of the CMTS device returns a response message to the target CM to establish a connection relationship between the CMTS device and the first target CM, the second target CM, and the third target CM, respectively;

The first sending unit 1004 simultaneously sends a DPV-REQ message with a type value of 39 to a plurality of target CMs;

The first sending unit 1004 records the start timestamp of the DPV-REQ message sent in the DPV-REQ message.

That is, in the application scenario, the start timestamp recorded in the DPV-REQ message sent by the first sending unit 1004 to the first target CM, the second target CM, and the third target CM is 10 :00;

The first target CM, the second target CM, and the third target CM respectively respond to the DOCSIS path check response DPV-RSP message message with a type value of 40 according to the DPV-REQ message, and the CMTS device a receiving unit 1005 receives the DPV-RSP message of the first target CM, the second target CM and the third target CM respectively;

The recording unit 1006 of the CMTS device determines a receiving timestamp of receiving each DPV-RSP message message;

The recording unit 1006 further includes a first recording module 10061 or a second recording module 10062;

The first recording module 10061 may record the received timestamp into a corresponding DPV-RSP message, and the second recording module 10062 may record the received timestamp into a database;

In the application scenario, the first recording module 10061 of the recording unit 1006 will receive the receiving time. The stamp is recorded in the corresponding DPV-RSP message.

That is, in the application scenario, the first recording module 10061 of the recording unit 1006 records the receiving time stamp 10:08 of the first DPV-RSP message sent by the first target CM to the first target CM. Returned in the first DPV-RSP message message;

The first recording module 10061 of the recording unit 1006 records the receiving time stamp 10:05 of the second DPV-RSP message sent by the second target CM to the second DPV-RSP returned by the second target CM. In the message message;

The first recording module 10061 of the recording unit 1006 records the receiving time stamp 10:02 of the third DPV-RSP message sent by the third target CM to the third DPV-RSP returned by the third target CM. In the message message;

The first determining unit 1007 of the CMTS device determines that the transmission delay of the first target CM is 10:08-10:00=0.08S;

The first determining unit 1007 determines that the transmission delay of the second target CM is 10:05-10:00=0.05S;

The first determining unit 1007 determines that the transmission delay of the third target CM is

10:02-10:00=0.02S; Nothing is normal;

In the application scenario, the third determining unit 1008 of the CMTS device preferably determines whether each transmission delay is greater than or equal to a predetermined threshold;

In the application scenario, the predetermined threshold value of the third determining unit 1008 is 0.06 S; the third determining unit 1008 of the CMTS device determines that the transmission delay of the first target CM is greater than a predetermined threshold. 0.06S, the fourth determining unit 1009 determines that the first target CM connection is abnormal, and the first target CM may be normally registered or its communication channel established with the CMTS device is faulty;

The fourth determining unit 1009 notifies the operation and maintenance personnel of the abnormality of the first target CM connection;

The third determining unit 1008 of the CMTS device determines that the transmission delay 0.05S of the second target CM is less than a predetermined threshold 0.06 S, and the fifth determining unit 1010 of the CMTS device determines the The second target CM is connected normally;

The fifth determining unit 1010 notifies the operation and maintenance personnel that the second target CM is connected normally;

The third determining unit 1008 determines that the transmission delay 0.02S of the third target CM is less than a predetermined threshold 0.06 S, and the fifth determining unit 1010 determines that the third target CM connection is normal; the fifth determining The unit 1010 notifies the operation and maintenance personnel that the third target CM is connected normally.

The embodiment shown in Figs. 6 to 10 illustrates the specific structure of the CMTS device from the perspective of the functional module. The specific structure of the CMTS device will be described from a hardware perspective with reference to the embodiment shown in Fig. 11:

As shown in FIG. 11, the CMTS device includes: a transmitter 1101, a receiver 1102, and a processor 1103. The processor 1103 can be one or more. In this embodiment, an example is used as an example:

In this embodiment, the transmitter 1101, the receiver 1102, and the processor 1103 are connected through a bus. Of course, other connection modes are also used. The specific connection mode is not limited in this embodiment. Components, two or more components may be combined, or may have different component configurations or arrangements, each component may be in hardware, software or hardware and software including one or more signal processing and/or application specific integrated circuits. Combined implementation.

The transmitter 1101 is configured to perform the following operations:

The receiver 1102 is configured to perform the following operations:

Receiving, by the target CM, the DOCSIS path check response of the DPV-REQ message to respond to the DPV-RSP text message;

The processor 1103 is configured to perform the following operations:

Recording a receiving timestamp of receiving the DPV-RSP message message;

Determining that the difference between the receiving timestamp and the starting timestamp is the CMTS device and the target The transmission delay between the standard CMs.

In this embodiment, the processor 1103 determines, by using a DPV message for testing delay between the CMTS device and the CM in the management message of the MAC layer, the time of the message exchange between the CMTS device and the CM, because the DPV message is The MAC layer message, which in turn makes the CM still work without responding to IP Ping. And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DPV message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any special for the CM. The requirements are applicable on all CMs.

The specific structure of the CMTS device that can record the received time stamp is described below from the perspective of hardware in conjunction with the embodiment shown in FIG.

As shown in FIG. 12, the CMTS device includes: a transmitter 1201, a receiver 1202, and a processor 1203. The processor 1203 may be one or more. In this embodiment, an example is used as follows:

The transmitter 1201 is specifically configured to perform the following operations:

The receiver 1202 is configured to perform the following operations:

The processor 1203 is configured to perform the following operations:

Or,

Recording the received timestamp into a database, and the receiving timestamp and the

Corresponding relationships of DPV-RSP message messages are stored in the database;

Determining a difference between the received timestamp and the start timestamp is a transmission delay between the CMTS device and the target CM.

In this embodiment, the processor 1203 may record the receiving time stamp to the corresponding In the DPV-RSP message, the receiving timestamp may also be recorded in the database, so that the processor 1203 may determine the CMTS device and the according to the received timestamp and the starting timestamp that have been recorded. The transmission delay between target CMs.

The specific structure of the CMTS device that can determine the target CM is illustrated from a hardware perspective in conjunction with the embodiment shown in FIG.

The CMTS device includes: a transmitter 1301, a receiver 1302, and a processor 1303;

The receiver 1302 is specifically configured to perform the following operations:

Receiving a registration request message sent by the CM;

The processor 1303 is specifically configured to perform the following operations:

In this embodiment, the processor 1303 determines that the target CM is one as an example. The transmitter 1301 is specifically configured to perform the following operations:

Returning, to the target CM, a response message indicating that the target CM is successfully registered, to establish a connection relationship between the CMTS device and the target CM;

The transmitter 1301 is further configured to perform the following operations:

The receiver 1302 is further configured to perform the following operations:

The processor 1303 is configured to perform the following operations:

Recording a receiving timestamp of receiving the DPV-RSP message message;

In this embodiment, the processor 1303 determines, according to the registration request message sent by the CM, a target CM that can establish a connection relationship with the CM, so that the processor 1303 can monitor the status of the target CM at any time, so that the operation and maintenance personnel can pass the CMTS device. The monitoring monitors the status of the target CM at any time, which is convenient for maintenance. In this embodiment, the target CM determined by the processor 1303 is one. The transmitter 1301 sends a DOCSIS Path Check Request DPV-REQ message to the target CM connected to the CMTS device in a unicast manner, and the processor 1303 can determine the transmission between the CMTS device and the target CM. Delay. And because this embodiment uses the basic function of testing the delay between the CMTS device and the CM in the DOCSIS specification, the DP V message is a message that all CMs in the DOCSIS specification must support, so that there is no need to have any CM Special requirements are applicable on all CMs, making this embodiment widely available on CMTS.

The specific structure of the multicast CMTS device can be explained from the hardware point of view below with reference to the embodiment shown in FIG.

The CMTS device includes: a transmitter 1401, a receiver 1402, and a processor 1403;

The receiver 1402 is specifically configured to perform the following operations:

Receiving a registration request message sent by the CM;

The processor 1403 is specifically configured to perform the following operations:

In this embodiment, the processor 1403 determines that the target CM is one as an example. The transmitter 1401 is specifically configured to perform the following operations:

The transmitter 1401 is further configured to perform the following operations:

Sending the DPV-REQ message to the plurality of target CMs at the same time;

The receiver 1402 is further configured to perform the following operations:

The processor 1403 is configured to perform the following operations:

In this embodiment, the processor 1403 determines, according to the registration request message sent by the CM, a plurality of target CMs that can establish a connection relationship with the CM, so that the processor 1403 can monitor the plurality of the objects at any time. The status of the standard CM enables the operation and maintenance personnel to monitor the status of multiple target CMs simultaneously through the CMTS device, thereby facilitating maintenance. In the embodiment, the processor 1403 determines that the target CM is multiple, and the transmitter 1401 simultaneously sends the DPV-REQ message to the plurality of target CMs in a multicast manner, that is, The processor 1403 can be caused to determine a transmission delay between the CMTS device and the target CM. For the multicast mode provided in this embodiment, the transmitter 1401 sends a DPV-REQ message to enable multiple target CMs to receive, and multiple target CMs return the DPV-RSP to the receiver 1402. The message message, which is equivalent to the CMTS device being able to perform DOCSIS ping on multiple target CMs at the same time. This embodiment enables the operation and maintenance personnel to simultaneously detect the operation of each CM and quickly diagnose the cause of the fault on the CMTS device. And positioning. The specific structure of the CMTS device that determines the connection status of the target CM by delay:

The CMTS device includes: a transmitter 1501, a receiver 1502, and a processor 1503;

The receiver 1502 is specifically configured to perform the following operations:

Receiving a registration request message sent by the CM;

The processor 1503 is specifically configured to perform the following operations:

In this embodiment, the processor 1503 determines that the target CM is one as an example. The transmitter 1501 is specifically configured to perform the following operations:

The transmitter 1501 is further configured to perform the following operations:

Sending the DPV-REQ message to the plurality of target CMs at the same time;

The receiver 1502 is further configured to perform the following operations:

The processor 1503 is configured to perform the following operations:

Determining, respectively, corresponding to the DPV-RSP text message that each of the target CMs responds to The difference between the receiving timestamp and the starting timestamp is the transmission delay between the CMTS device and the target CM;

The processor 1503 is further configured to perform the following operations:

Determining whether the transmission delay is greater than or equal to a predetermined threshold;

The processor 1503 determines whether each of the target CMs is normally connected to the CMTS device according to the predetermined threshold according to the determined transmission delay, so that the processor 1503 can monitor at any time. The connection status of each of the target CMs, in turn, can track the target CM with connection problems, and this embodiment can be used on any bidirectional CM without any special requirements for the CM because it uses the periodicity of the standard in the DOCSIS specification. The basic function of ranging is widely used on CMTS.

Claims

Rights request

1. A transmission delay measurement method based on the DOCSIS protocol, which is characterized by including: The cable modem terminal system CMTS device sends a DOCSIS path verification request DPV-REQ message to the target cable modem CM connected to the CMTS device. message, the DPV-REQ message contains a record of the start timestamp of the DPV-REQ message sent by the CMTS device;

The CMTS device receives the DOCSIS path verification response DPV-RSP message of the DPV-REQ message responded by the target CM;

The CMTS device records the reception timestamp of receiving the DPV-RSP message; the CMTS device determines that the difference between the reception timestamp and the start timestamp is the

The transmission delay between the CMTS device and the target CM.

2. The transmission delay measurement method based on the DOCSIS protocol according to claim 1, characterized in that the reception timestamp recorded by the CMTS device when the DPV-RSP message is received includes:

The CMTS device records the receiving timestamp to the receiving timestamp corresponding to the receiving timestamp.

In the DPV-RSP message;

or,

The CMTS device records the reception timestamp into a database, and stores the corresponding relationship between the reception timestamp and the DPV-RSP message in the database.

3. The transmission delay measurement method based on the DOCSIS protocol according to claim 1, characterized in that the cable modem terminal system CMTS device sends a DOCSIS path verification request DPV-REQ message to the target cable modem CM. Also previously included:

The CMTS device receives the registration request message sent by the CM;

The CMTS device determines at least one target CM that can establish a connection relationship with the CMTS device;

The CMTS device returns a response message indicating successful registration of the target CM to the target CM, so as to establish a connection relationship between the CMTS device and the target CM.

4. The transmission delay measurement method based on the DOCSIS protocol according to claim 3, characterized in that there are multiple target CMs; The cable modem terminal system CMTS device sends a DOCSIS path verification request DPV-REQ message to the target cable modem CM connected to the CMTS device, including: the CMTS device sends the DPV-REQ message simultaneously Send to multiple said targets separately

CM;

The CMTS device receives the DPV-REQ message responded by the target CM.

DOCSIS path verification response DPV-RSP message includes:

The CMTS device receives the DPV-RSP message messages responded by multiple target CMs respectively;

The CMTS device records the reception timestamp of receiving the DPV-RSP message including: the CMTS device separately records the received response from each of the target CMs.

The reception timestamp of the DPV-RSP message;

The CMTS device determines that the difference between the receiving timestamp and the starting timestamp is the transmission delay between the CMTS device and the target CM, including: the receiving timestamp corresponding to the message and the starting time stamp The difference in timestamps is the transmission delay between the CMTS device and the target CM.

5. The transmission delay measurement method based on the DOCSIS protocol according to claim 1, characterized in that, the CMTS device determines that the difference between the receiving timestamp and the starting timestamp is determined by the CMTS device. Whether the transmission delay is greater than or equal to a predetermined threshold;

If so, the CMTS device determines that the connection between the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold and the CMTS device is abnormal;

If not, the CMTS device determines that the target CM corresponding to the transmission delay less than the predetermined threshold is connected normally to the CMTS device.

6. A cable modem terminal system CMTS device, characterized in that it includes: a first sending unit configured to send a DOCSIS path verification request DPV-REQ message to the target cable modem CM connected to the CMTS device. , the DPV-REQ message carries a record of the start timestamp of the CMTS device sending the DPV-REQ message; the first receiving unit is used to receive the DPV-REQ response from the target CM. REQ message message DOCSIS path verification response DPV-RSP message;

a recording unit, configured to record the reception timestamp of the DPV-RSP message; a first determination unit, configured to determine that the difference between the reception timestamp and the start timestamp is the difference between the CMTS device and the Describe the transmission delay between target CMs.

7. The cable modem terminal system CMTS equipment according to claim 6, characterized in that the recording unit includes:

A first recording module, configured to record the reception timestamp into the DPV-RSP message corresponding to the reception timestamp;

or,

The second recording module is used to record the reception timestamp into the database, and store the corresponding relationship between the reception timestamp and the DPV-RSP message in the database.

8. The cable modem terminal system CMTS equipment according to claim 6, characterized in that it further includes:

The second receiving unit is used to receive the registration request message sent by the CM;

A second determination unit, configured to determine at least one target CM that can establish a connection relationship with the CMTS device;

The second sending unit is configured to return a response message indicating successful registration of the target CM to the target CM, so as to establish a connection relationship between the CMTS device and the target CM.

9. The cable modem terminal system CMTS device according to claim 8, characterized in that there are multiple target CMs;

The first sending unit is specifically configured to send the DPV-REQ message to multiple target CMs at the same time;

The first receiving unit is specifically configured to receive multiple DPV-RSP message messages responded by the target CM respectively;

The recording unit is specifically configured to record the received responses of each target CM respectively.

The reception timestamp of the DPV-RSP message;

The first determining unit is specifically configured to respectively determine that the difference between the reception timestamp and the start timestamp corresponding to the DPV-RSP message responded by each target CM is the difference between the CMTS device and the DPV-RSP message. The transmission delay between the target CMs.

10. The cable modem terminal system CMTS equipment according to claim 6, characterized in that it further includes:

The third determination unit is used to determine whether the transmission delay is greater than or equal to the predetermined threshold; the fourth determination unit is used to determine whether the transmission delay is greater than or equal to the predetermined threshold if the third determination unit determines that the transmission delay is greater than or equal to the predetermined threshold, Then it is determined that the connection between the target CM corresponding to the transmission delay greater than or equal to the predetermined threshold and the CMTS device is abnormal;

A fifth determination unit configured to determine, if the third determination unit determines that the transmission delay is less than the predetermined threshold, the target CM corresponding to the transmission delay less than the predetermined threshold and the The above CMTS equipment is connected normally.

11. A wired broadband network access system, characterized by including the cable modem terminal system CMTS device according to any one of claims 6 to 10 and at least one cable modem CM.

12. A cable modem terminal system CMTS device, characterized by including a transmitter, a receiver and a processor;

The transmitter is used to perform the following operations:

Send a DOCSIS path verification request DPV-REQ message to the target cable modem CM connected to the CMTS device. The DPV-REQ message carries a record of the DPV-REQ message sent by the CMTS device. The starting timestamp;

The receiver is used to perform the following operations:

Receive the DOCSIS path verification response DPV-RSP message of the DPV-REQ message responded by the target CM;

The processor is used to perform the following operations:

Record the reception timestamp of receiving the DPV-RSP message;

The difference between the receiving timestamp and the starting timestamp is determined to be the transmission delay between the CMTS device and the target CM.

13. The cable modem terminal system CMTS equipment according to claim 12, characterized in that,

The processor is specifically used to perform the following operations:

The reception timestamp is recorded in the DPV-RSP message message corresponding to the reception timestamp. breathing;

or,

The reception timestamp is recorded in a database, and the corresponding relationship between the reception timestamp and the DPV-RSP message is stored in the database.

14. The cable modem terminal system CMTS equipment according to claim 12, characterized in that,

The receiver is specifically used to perform the following operations:

Receive the registration request message sent by CM;

The processor is specifically used to perform the following operations:

Determine at least one of the target CMs that can establish a connection relationship with the CMTS device;

The transmitter is specifically used to perform the following operations:

Return a response message indicating successful registration of the target CM to the target CM to establish a connection relationship between the CMTS device and the target CM.

15. The cable modem terminal system CMTS equipment according to claim 14, characterized in that there are multiple target CMs;

The transmitter is specifically used to perform the following operations:

Send the DPV-REQ message to multiple target CMs at the same time;

The receiver is specifically used to perform the following operations:

Receive the DPV-RSP text messages responded by multiple target CMs respectively;

The processor is specifically used to perform the following operations:

Record the reception timestamp of the DPV-RSP message received from each of the target CMs respectively;

The difference between the reception timestamp and the start timestamp corresponding to the DPV-RSP message responded by each target CM is determined to be the transmission time between the CMTS device and the target CM. extension.

16. The cable modem terminal system CMTS device according to claim 12, wherein the processor is specifically configured to perform the following operations:

Determine whether the transmission delay is greater than or equal to a predetermined threshold;

If it is determined that the transmission delay is greater than or equal to the predetermined threshold, then it is determined that the transmission delay is greater than or equal to the The target CM corresponding to the transmission delay of the predetermined threshold is abnormally connected to the CMTS device; if it is determined that the transmission delay is less than the predetermined threshold, then it is determined that the transmission delay is less than the predetermined threshold. The connection between the target CM corresponding to the delay and the CMTS device is normal.