TWI448113B - Cable modem and multiple packet cable standard supporting method - Google Patents

Description

Cable data machine and method for supporting multiple packet cable standards

This invention relates to cable modems, and more particularly to a method of cable modem support for a plurality of packet cable standards.

The standard used by cable modems is mainly the Packet Cable standard, which defines a multimedia network structure accessed by a high-speed cable modem. The goal is to provide IP-based multimedia services. A complete solution for Voice over Internet Protocol (VoIP) services. After years of development, the packet cable standard has been formed into multiple versions. The current mainstream packet cable standards are packet cable standard 1.X and packet cable standard 2.0, where packet cable standard 1.X includes packet cable standard 1.0 and packet cable standard 1.5. The Media Gateway Control Protocol (MGCP) commonly used in the VoIP field is applied to the packet cable standard 1.X, and the Session Initiation Protocol (SIP) is applied to the Packet Cable Standard 2.0.

In general, which packet cable standard is used by the cable modem, the operator will uniformly set it on the central server according to the area where the cable modem is located or other requirements. In this way, the cable modem must use the packet cable standard set by the operator in order to successfully access the network. Therefore, when the user moves or other reasons cause the setting changes on the central server, it needs to be replaced with the changed packet cable standard. Cable data machines, resulting in increased network access costs and equipment waste.

In view of this, it is necessary to provide a cable modem that can support a variety of packet cable standards.

In view of this, it is necessary to provide a method for a cable modem to support multiple packet cable standards to support multiple packet cable standards.

The cable data machine in the embodiment of the present invention communicates with the dynamic host allocation agreement server. The dynamic host configuration protocol server includes a plurality of dynamic host configuration protocol servers corresponding to a plurality of packet cable standards and a dynamic host configuration protocol server of the terminal. The cable data machine includes a transceiver module, a determination module and a replacement module. The transceiver module is configured to broadcast a dynamic host configuration protocol Discover packet to the dynamic host configuration protocol server and the dynamic host configuration protocol server of the terminal corresponding to the plurality of packet cable standards, using one of a plurality of packet cable standards, and The dynamic host configuration protocol Offer packet is received from one of the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal. The determining module is configured to determine whether the received dynamic host configuration agreement Offer packet conforms to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet. The replacement module is configured to replace the packet cable standard used by the cable modem when receiving the dynamic host configuration protocol Offer packet that does not conform to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet, so that the cable The modem can communicate with the corresponding Dynamic Host Configuration Agreement server.

A method of supporting multiple packet cable standards in an embodiment of the present invention is used in a cable modem. The cable modem communicates with the dynamic host configuration protocol server. The Dynamic Host Configuration Agreement server includes a plurality of dynamic host configurations corresponding to a plurality of packet cable standards. Set the dynamic host configuration protocol server for the protocol server and terminal. The method includes broadcasting a dynamic host configuration protocol Discover packet to one of a dynamic host configuration protocol server corresponding to a plurality of packet cable standards and a dynamic host configuration protocol server of the terminal using one of a plurality of packet cable standards; One of the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal receives the dynamic host configuration protocol Offer packet; determines whether the received dynamic host configuration protocol Offer packet conforms to the broadcast dynamics. The packet cable standard used by the host configuration protocol Discover packet; if a dynamic host configuration agreement offer packet that does not conform to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet is received, the packet used by the cable modem is replaced. Cable standard to enable the cable modem to communicate with the corresponding dynamic host configuration protocol server.

The above and the technical effects of the invention can be easily understood from the following detailed description of the embodiments and the accompanying drawings.

10‧‧‧ Cable Data Machine

20‧‧‧ Terminal equipment

40‧‧‧ head end

50‧‧‧DHCP server

52‧‧‧DHCP server for PC1.X

54‧‧‧PC2.0 DHCP Server

56‧‧‧ Terminal DHCP Server

12‧‧‧ Processor

14‧‧‧ Storage media

100‧‧‧ transceiver module

102‧‧‧Judgement module

104‧‧‧Replacement module

106‧‧‧Registration Module

1 is an application environment diagram of an embodiment of a cable data machine of the present invention.

2 is a structural diagram of an embodiment of the cable data machine of FIG. 1.

3 is a flow chart of an embodiment of a method for supporting multiple packet cable standards according to the present invention.

4 is a schematic diagram of an embodiment of a method for supporting multiple packet cable standards shown in FIG.

5 is a schematic diagram of another embodiment of the method of supporting multiple packet cable standards shown in FIG.

Referring to FIG. 1, an application environment diagram of an embodiment of a cable modem 10 of the present invention is shown. After the cable modem 10 is started, the IP address of the Dynamic Host Configuration Protocol (DHCP) server 50 is obtained by the head end 40, and the registration is completed according to the obtained IP address. Thereafter, the terminal is terminated. The device 20 can access the network by the cable modem 10. In this embodiment, the head end 40 may be a network modem device such as a cable modem terminal system (CMTS) or a central office router, and the terminal device 20 may be a user such as a computer or an IP phone. terminal.

In the present embodiment, the cable modem 10 provides at least two modes of operation, one using a Packet Cable (hereinafter referred to as PC) 1.X standard, and one using a PC 2.0 standard, wherein PC1.X includes PC1. .0 and PC1.5. It should be noted that the cable modem 10 is not limited to the above two modes of operation, but may include all packet cable standards. The embodiment of the present invention is exemplified by PC1.X or PC2.0 as an example. Description.

The default packet cable standard is set in the cable modem 10, which may be PC1.X or PC2.0. The operator sets the available packet cable standard for the cable modem 10 at the central office, such as PC1.X or PC2.0. If the default packet cable standard of the cable modem 10 is consistent with the packet cable standard set by the operator, the cable modem 10 will successfully complete the registration, but if the two are inconsistent, the cable modem 10 will not acquire. To the IP address, registration cannot be completed successfully. The cable modem 10 provided in the present embodiment can automatically use the packet cable standard according to the packet cable standard set by the operator, thereby successfully completing the registration.

In the present embodiment, the DHCP server 50 includes a plurality of packet cable standard pairs. The DHCP server should be a DHCP server 52 such as PC1.X or a DHCP server 54 of PC2.0. In addition, the DHCP server 50 also includes a DHCP server 56 of the terminal. Among them, the DHCP server 52 of PC1.X refers to the DHCP server supporting the PC1.X standard, and all the cable data machines designated by the operator using the PC1.X standard communication are handled by the DHCP server 52 of the PC 1.X. The DHCP server 54 of the PC2.0 refers to a DHCP server that supports the PC2.0 protocol. All the cable data machines designated by the operator to use the PC2.0 standard communication are handled by the DHCP server 54 of the PC2.0. The DHCP server 56 of the terminal refers to a DHCP server that provides DHCP service to the terminal device 20. All DHCP devices that access the terminal device of the network 30 by the cable modem 10 are responsible for the DHCP server 56 of the terminal.

Referring to FIG. 2, a block diagram of an embodiment of the cable modem 10 of FIG. 1 is shown. In the present embodiment, the cable modem 10 includes a processor 12, a storage medium 14, a transceiver module 100, a determination module 102, a replacement module 104, and a registration module 106. Through the transceiver module 100, the determination module 102 and the replacement module 104, the cable modem 10 can automatically replace the packet cable standard according to the packet cable standard set by the operator, so that the cable modem 10 supports multiple packets. Cable standard. Thereafter, the cable modem 10 is then registered by the registration module 106. The processor 12 executes the transceiver module 100, the determination module 102, the replacement module 104, and the registration module 106 stored in the storage medium 14 to implement their respective functions. For a detailed description of the specific functions of the above modules, please refer to the description of FIG. 3 below.

Referring to FIG. 3, a flow chart of an embodiment of a method for supporting multiple packet cable standards according to the present invention is shown. The method is used in the cable modem 10 of Figures 1 and 2 and is completed by the functional module shown in Figure 2.

In step S300, the transceiver module 100 broadcasts the DHCP Discover packet to the DHCP server 52 of the PC 1.X and the DHCP server of the PC 2.0 using one of a plurality of packet cable standards. The server 54 and the DHCP server 56 of the terminal. In step S302, the transceiver module 100 receives the DHCP Offer packet from one of the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, and the DHCP server 56 of the terminal. In step S304, the determining module 102 determines whether the DHCP Offer packet received by the transceiver module 100 conforms to the packet cable standard used by the broadcast DHCP Discover packet.

Here, the DHCP Offer packet conforms to the packet cable standard used by the broadcast DHCP Discover packet. The DHCP Offer packet includes the configuration file and Option 122, and the packet cable standard adopted by the configuration file is consistent with DHCP Discover. The Option 122 is a special field in the DHCP packet specified in the DHCP. The DHCP server 52 for the PC 1.X and the DHCP server 54 of the PC 2.0 send the information to the cable modem 10. Here, the DHCP Offer packet includes the configuration file and Option 122 refers to the value that can be read from the DHCP Offer packet.

In the present embodiment, the DHCP Offer received by the cable modem 10 must include the profile of the default packet cable standard of the cable modem 10 and Option 122. However, if the default packet cable standard of the cable modem 10 is inconsistent with the packet cable standard set by the operator, the configuration file and Option 122 will not be present in the DHCP Offer sent by the terminal's DHCP server 56. Then, the judging module 102 judges that the DHCP Offer packet received by the transceiver module 100 does not conform to the packet cable standard used by the broadcast DHCP Discover packet.

If the determining module 102 determines that the transceiver module 100 receives the DHCP Offer packet that does not meet the packet cable standard used by the broadcast DHCP Discover packet, the replacement module 104 replaces the packet used by the cable modem 10 in step S306. The cable standard is such that the cable modem 10 can communicate with the corresponding DHCP server. The replacement module 104 switches the cable modem 10 to another operating mode to use another Group cable standard. Thus, when the packet cable standard of the cable modem 10 itself is inconsistent with the packet cable standard set by the operator, after one or more replacements, the replacement module 104 can naturally replace its own packet cable standard with The packet cable standards set by the operators are consistent, allowing multiple packet cable standards to coexist.

In step S308, the transceiver module 100 broadcasts the DHCP Discover packet to the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, and the DHCP server 56 of the terminal using the replaced packet cable standard. In step S302, the transceiver module 100 receives the DHCP Offer packet from one of the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, and the DHCP server 56 of the terminal. In step S304, the determining module 102 determines whether the DHCP Offer packet received by the transceiver module 100 again conforms to the packet cable standard used by the broadcast DHCP Discover packet. The cable modem 10 loops through steps S306, S308, S302, S304 to obtain a DHCP Offer packet that conforms to the packet cable standard used by the broadcast DHCP Discover packet.

If the determining module 102 determines that the transceiver module 100 receives the DHCP Offer packet conforming to the packet cable standard used by the broadcast DHCP Discover packet, the transceiver module 100 broadcasts the DHCP Request to the DHCP server of the PC 1.X in step S310. 52. The DHCP server 54 of the PC 2.0 and the DHCP server 56 of the terminal confirm whether the IP address allocated in the DHCP Offer packet conforming to the packet cable standard used for broadcasting the DHCP Discover packet is occupied. At this time, the DHCP server 52 of the PC 1.X or the DHCP server 54 of the PC 2.0 that transmits the DHCP Offer packet conforming to the packet cable standard used for broadcasting the DHCP Discover packet will transmit the DHCP Ack packet. In step S312, the transceiver module 100 receives the DHCP Ack packet from the DHCP server 52 of the PC 1.X corresponding to the packet cable standard used for broadcasting the DHCP Discover packet or the DHCP server 54 of the PC 2.0, and according to the received DHCP. Ack packet complete registration .

It should be noted that the DHCP Discover packet, the DHCP Offer packet, the DHCP Request packet, and the DHCP Ack packet are common packets in the normal DHCP service process, and are in compliance with the DHCP protocol, so no further description is provided herein.

To better illustrate the cable modem 10 of the present invention and its method of supporting multiple packet cable standards, two specific embodiments shown in Figures 4 and 5 are presented herein.

4 is a schematic diagram of an embodiment of a method for supporting multiple packet cable standards shown in FIG. In the present embodiment, the packet cable standard set by the operator for the cable modem 10 is PC 1.X, that is, the operator has the DHCP server 52 of the PC 1.X responsible for the DHCP service of the cable modem 10. The packet cable standard used by the cable modem 10 by default is PC2.0.

First, the cable modem 10 broadcasts the DHCP Discover packet of PC 2.0 to the DHCP server 50 to request the DHCP server 50 to assign an IP address to the cable modem 10. At this time, the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, and the DHCP server 56 of the terminal all receive the DHCP Discover packet of the cable modem 10.

Since the standard used by the DHCP Discover packet is PC 2.0, the DHCP server 52 of PC 1.X does not send a DHCP Offer packet to the cable modem 10. Meanwhile, since the operator sets the DHCP server 52 responsible for the cable modem 10 to be the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0 does not send the DHCP Offer packet to the cable modem 10. That is to say, only the DHCP server 56 of the terminal sends a DHCP Offer packet to the cable modem 10 at this time.

The cable modem 10 then receives the DHCP Offer packet from the DHCP server 56 of the terminal. Thus, the cable modem 10 determines that the DHCP Offer packet from the DHCP server 56 of the terminal does not conform to the broadcast DHCP Discover packet used. The packet cable standard is not a DHCP Offer packet that you need. The cable modem 10 replaces the packet cable standard used from PC2.0 to PC1.X, and broadcasts the DHCP Discover packet of PC1.X to the DHCP server 52 of PC1.X and the DHCP server 54 of PC2.0. The DHCP server 56 of the terminal. At this time, the DHCP server 52 of the PC 1.X sends a DHCP Offer packet to the cable modem 10.

At this time, the cable modem 10 receives the DHCP Offer packet from the DHCP server 52 of PC 1.X. The cable modem 10 determines that the DHCP Offer packet from the DHCP server 52 of PC 1.X conforms to the packet cable standard used by the broadcast DHCP Discover packet, and is the DHCP Offer packet that it needs. Then, the cable modem 10 broadcasts the DHCP Request to the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, the DHCP server 56 of the terminal, and receives the DHCP from the DHCP server 52 of the PC 1.X. The Ack packet is registered.

5 is a schematic diagram of another embodiment of the method of supporting multiple packet cable standards shown in FIG. In the present embodiment, the packet cable standard set by the operator for the cable modem 10 is PC 2.0, that is, the operator has the DHCP server 54 of the PC 2.0 responsible for the DHCP service of the cable modem 10. The default cable cable standard used by cable modem 10 is PC1.X.

First, the cable modem 10 broadcasts the DHCP Discover packet of PC 1.X to the DHCP server 50 to request the DHCP server 50 to assign an IP address to the cable modem 10. At this time, the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, and the DHCP server 56 of the terminal all receive the DHCP Discover packet of the cable modem 10. Similarly, only the terminal's DHCP server 56 will send a DHCP Offer packet to the cable modem 10 at this time.

The cable modem 10 then receives the DHCP Offer packet from the DHCP server 56 of the terminal. Thus, the cable modem 10 determines the DHCP servo from the terminal. The DHCP Offer packet of the device 56 does not conform to the packet cable standard used by the broadcast DHCP Discover packet, and is not a DHCP Offer packet that is required by itself. The cable modem 10 replaces the packet cable standard used from PC1.X to PC2.0, and broadcasts the DHCP Discover packet of PC2.0 to the DHCP server 52 of PC1.X and the DHCP server 54 of PC2.0. The DHCP server 56 of the terminal. At this time, the DHCP server 54 of the PC 2.0 sends a DHCP Offer packet to the cable modem 10.

At this time, the cable modem 10 receives the DHCP Offer packet from the DHCP server 54 of the PC 2.0. The cable modem 10 determines that the DHCP Offer packet from the DHCP server 54 of the PC 2.0 conforms to the packet cable standard used by the broadcast DHCP Discover packet, and is the DHCP Offer packet that it needs. Then, the cable modem 10 broadcasts the DHCP Request to the DHCP server 52 of the PC 1.X, the DHCP server 54 of the PC 2.0, the DHCP server 56 of the terminal, and receives the DHCP from the DHCP server 54 of the PC 2.0. The Ack packet is registered.

The cable modem 10 of the present invention determines the default packet cable standard of the cable modem 10 by the determination module 102 determining whether the DHCP Offer received by the transceiver module 100 conforms to the packet cable standard used by the broadcast DHCP Discover packet. Whether it is consistent with the packet cable standard set by the operator, so that PC1.X or PC2.0 is selected as the packet cable standard of the cable modem 10 according to the judgment result, so that the cable modem 10 can support a plurality of packet cables. The standard effectively increases the scope of application of the cable modem 10.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims.

Claims (10)

A cable data machine, the cable data machine is in communication with a dynamic host configuration protocol server, wherein the dynamic host configuration protocol server comprises a plurality of dynamic host configuration protocol servers corresponding to a plurality of packet cable standards and a dynamic host of the terminal Configuring a protocol server, the cable data machine comprising: a transceiver module for broadcasting a dynamic host configuration protocol Discover packet to one of a plurality of packet cable standards to the dynamic host configuration protocol corresponding to the plurality of packet cable standards The server and the dynamic host configuration protocol server of the terminal receive the dynamic host configuration agreement Offer from one of the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal a packet; a judging module, configured to determine whether the received dynamic host configuration agreement Offer packet conforms to a packet cable standard used by the broadcast dynamic host configuration protocol Discover packet; and the replacement module is configured to receive the dynamic host configuration protocol Offer packet does not comply with the broadcast dynamic host configuration agreement Discover When the cable is a standard packet, a packet used to replace the cable modem standard cable is used, so that the cable modem can be arranged with the respective dynamic host communication protocol server. The cable data machine of claim 1, wherein the transceiver module is further configured to broadcast the dynamic host configuration protocol Discover packet to the plurality of packet cable standards by using the replaced packet cable standard. The dynamic host configuration protocol server and the dynamic host configuration protocol server of the terminal obtain a dynamic host configuration protocol offer packet conforming to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet. The cable data machine according to claim 2, wherein the transceiver module is further configured to receive a dynamic master that meets a packet cable standard used by the Broadcast Dynamic Host Configuration Protocol Discover packet. When the machine configures the agreement offer packet, the broadcast dynamic host configuration protocol Request packet is sent to the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal, and the broadcast dynamic host configuration protocol Discover The dynamic host configuration protocol server corresponding to the packet cable standard used by the packet receives the dynamic host configuration protocol Ack packet to complete registration according to the dynamic host configuration protocol Ack packet. The cable data machine of claim 3, wherein the dynamic host configuration protocol Offer packet conforms to the broadcast dynamic host configuration protocol, and the packet cable standard used by the Discover packet refers to the dynamic host configuration protocol Offer packet including the configuration file. With Option 122, the configuration of the packet cable standard is consistent with the dynamic host configuration protocol Discover packet. The cable data machine of claim 1, wherein the plurality of packet cable standards comprises a packet cable standard 1.X and a packet cable standard 2.0, and the packet cable standard 1.X includes a packet cable. Standard 1.0 and packet cable standard 1.5. A method for supporting a plurality of packet cable standards for use in a cable data machine, the cable data machine communicating with a dynamic host configuration protocol server, wherein the dynamic host configuration protocol server includes a plurality of packets corresponding to a plurality of packet cable standards Dynamic host configuration protocol server and dynamic host configuration protocol server for the terminal, the method comprising: broadcasting a dynamic host configuration protocol Discover packet to one of a plurality of packet cable standards to the dynamics corresponding to the plurality of packet cable standards a host configuration protocol server and a dynamic host configuration protocol server of the terminal; receiving dynamic host configuration from one of the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal The agreement offer packet; determining whether the received dynamic host configuration agreement Offer packet conforms to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet; if the received dynamic host configuration agreement offer packet does not comply with the broadcast dynamic host configuration protocol The score used by the Discover packet Cable standard, sub cable modem is used to replace A cable standard is set to enable the cable modem to communicate with the corresponding dynamic host configuration protocol server. A method for supporting a plurality of packet cable standards as described in claim 6, the method further comprising: broadcasting the dynamic host configuration protocol Discover packet to the plurality of packet cable standards using the replaced packet cable standard The dynamic host configuration protocol server and the dynamic host configuration protocol server of the terminal obtain a dynamic host configuration protocol offer packet conforming to the packet cable standard used by the broadcast dynamic host configuration protocol Discover packet. The method for supporting a plurality of packet cable standards as described in claim 7, the method further comprising: if receiving a dynamic host configuration protocol offer packet conforming to a packet cable standard used by the broadcast dynamic host configuration protocol Discover packet, Broadcasting the dynamic host configuration protocol Request packet to the dynamic host configuration protocol server corresponding to the plurality of packet cable standards and the dynamic host configuration protocol server of the terminal; and the packet cable used by the broadcast dynamic host configuration protocol Discover packet The dynamic host configuration protocol server corresponding to the line standard receives the dynamic host configuration protocol Ack packet, and completes registration according to the received dynamic host configuration protocol Ack packet. The method for supporting a plurality of packet cable standards as described in claim 8 wherein the dynamic host configuration protocol Offer packet conforms to the broadcast dynamic host configuration protocol. The packet cable standard used by the Discover packet refers to the dynamic host configuration protocol Offer. The packet includes a configuration file and Option 122, and the configuration file uses a packet cable standard that is consistent with the dynamic host configuration protocol Discover packet. A method for supporting a plurality of packet cable standards, as described in claim 6, wherein the plurality of packet cable standards include a packet cable standard 1.X and a packet cable standard 2.0, and the packet cable standard 1.X Includes packet cable standard 1.0 and packet cable standard 1.5.