CN101184038A - User terminal and its information receiving method and sending method - Google Patents

Abstract

The invention relates to a user terminal and its information receiving method and sending method. Wherein, the receiving method includes: searching the VLAN tag in the data packet; judging the IP protocol type of the data packet; calling the IPv4 protocol stack or the IPv6 protocol stack to process the data packet. The sending method includes: adding a VLAN tag to the data packet; sending the data packet to the IPv4 or IPv6 service network by the access network device according to the VLAN tag. The user terminal includes a first module, a second module, a third module and a fourth module. Through the present invention, the user terminal can support the IPv4/IPv6 dual protocol stack, so that it can be connected to the service systems under the two network environments at the same time, such as the interactive multimedia service system, so that the service systems respectively located in the IPv4 network and the IPv6 network can serve the users The provision of services is conducive to promoting the smooth transition from the IPv4 network environment to the IPv6 network environment.

Description

User terminal and its information receiving method and sending method

technical field

The present invention relates to a user terminal and a method for receiving and sending information thereof, in particular to a user terminal and a corresponding method for receiving and sending information that can be applied to both IPv4 and IPv6 network environments.

Background technique

The interactive multimedia service is a kind of multimedia service that enables the client and the server to perform media interaction, including video, audio on demand, and text browsing. The existing interactive multimedia services are mainly based on the network environment of the IPv4 protocol. Wherein, the IPv4 protocol is a TCP/IP protocol family whose version number is 4 of the IP protocol. The number of addresses in the IPv4 protocol is 32 bits, that is, computers with a maximum of 2 to the power of 32 can be connected to the Internet. However, with the vigorous development of the Internet, the demand for IP addresses is increasing, and the IP address resources are becoming more and more scarce. In order to solve the problem of increasing demand for IP addresses, a network environment with the IPv6 protocol as the core has emerged. Wherein, the IPv6 protocol is a TCP/IP protocol family whose version number is 6 of the IP protocol. It redefines the address space and greatly increases the capacity of the IP address by adopting a 128-bit address length, which is an inevitable trend in the development of the next-generation network.

The defect of the prior art is that the transition from the IPv4 network to the IPv6 network requires a long period of time, and during this period, interactive multimedia services based on the IPv4 network and interactive multimedia services based on the IPv6 network will inevitably exist simultaneously. However, existing user terminal equipment for interactive multimedia services can only support a single IPv4 or IPv6 protocol, so interactive multimedia services based on the IPv4 protocol and the IPv6 protocol cannot be simultaneously implemented. That is, when the existing IPv4-based interactive multimedia services transition to IPv6-based interactive multimedia services, user terminal equipment supporting the IPv6 protocol stack must be redeveloped, resulting in a significant increase in time and cost for transition, and users can no longer Enjoy the original IPv4-based interactive multimedia services. Therefore, the scope of use of user terminal equipment is limited, and the process of transition from IPv4 network to IPv6 network is also hindered.

Contents of the invention

The problem to be solved by the present invention is to provide a user terminal technology capable of connecting to two network environments of the IPv4 protocol and the IPv6 protocol at the same time.

In order to solve the above problems, an embodiment of the present invention provides a method for receiving information of a user terminal, including:

When the user terminal receives the data packet, it searches for the virtual local area network mark in the link layer header of the data packet;

Judging the IP protocol type of the data packet according to the found VLAN tag;

According to the determined IP protocol type, the IPv4 protocol stack or the IPv6 protocol stack preloaded in the user terminal is invoked to process the data packet.

In order to solve the above problems, another embodiment of the present invention provides a user terminal information sending method, including:

According to the IP protocol type of the data packet to be sent, the user terminal adds a corresponding virtual local area network mark in the link layer header of the data packet, and sends it to the access network device;

The access network device sends the data packet to an IPv4 service network or an IPv6 service network according to the VLAN tag of the data packet.

In order to solve the above problems, another embodiment of the present invention provides a user terminal, including:

The first module is used to load the IPv4 protocol stack and the IPv6 protocol stack;

The second module is used to search the virtual local area network mark in the link layer header of the received data packet;

The third module is used to judge the IP protocol type of the data packet according to the virtual local area network mark found by the second module and send it to the fourth module;

The fourth module is configured to call the IPv4 protocol stack or the IPv6 protocol stack loaded in the first module to process the data packet according to the received IP protocol type.

Through the present invention, the user terminal can support the IPv4/IPv6 dual protocol stack, so that it can be connected to the service systems in the two network environments at the same time, such as the interactive multimedia service system, so that the service systems respectively located in the IPv4 network and the IPv6 network can serve the users. The provision of services is conducive to promoting the smooth transition from the IPv4 network environment to the IPv6 network environment.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a flowchart of an embodiment of an information receiving method of a user terminal according to the present invention;

FIG. 1A is a schematic structural diagram of each protocol stack in the user terminal described in the embodiment of the information receiving method of the user terminal according to the present invention;

FIG. 2 is a flowchart of an embodiment of an information sending method of a user terminal according to the present invention;

FIG. 3 is a schematic structural diagram of Embodiment 1 of the user terminal according to the present invention;

FIG. 4 is a schematic structural diagram of Embodiment 2 of the user terminal of the present invention.

Detailed ways

Embodiment of the information receiving method of the user terminal according to the present invention

This embodiment provides a method for receiving information of a user terminal supporting IPv4/IPv6 dual protocol stack, as shown in FIG. 1 , including:

Step 100, when the user terminal receives a data packet, it searches for a virtual local area network tag (hereinafter referred to as: VLAN tag) in the link layer header of the data packet. If the search is successful, go to step 110, otherwise go to step 120.

Among them, a virtual local area network (Virtual Local Area Network, hereinafter referred to as: VLAN) is a network technology that divides devices in a local area network into network segments logically rather than physically, thereby realizing a virtual workgroup. Its main working principle is: when the VLAN switch receives a data packet from a workstation, it checks part of the data packet, compares it with the content in the VLAN configuration database, and then determines the destination of the data packet. If the data packet is to be sent to a VLAN device, a VLAN tag is added to the data packet. Specifically, a VLAN tag can be added according to the existing 802.1Q protocol to distinguish different LANs, and then forwarded to the corresponding VLAN tag according to the VLAN tag. Destination; if the packet is destined for a non-VLAN device, the VLAN switch sends the packet without the VLAN tag. Since the VLAN usually realizes the division of the network segment on the data link layer, therefore, the VLAN tag also usually appears in the packet header of the link layer.

Step 110, judge the IP protocol type of the received data packet according to the found VLAN tag. Wherein, the IP protocol type mainly refers to whether the data packet adopts the IPv4 protocol or the IPv6 protocol.

Specifically, the IP protocol type of the VLAN that sends the packet can be judged at first according to the VLAN tag found, that is, it is judged whether the VLAN adopts the IPv4 protocol or the IPv6 protocol; The IP protocol type of the packet. This is because data packets transmitted in a VLAN usually have the same IP protocol type as the VLAN.

In addition, before judging the protocol type of the data packet, if the target address is a domain name address represented by a domain name, the corresponding IPv4 or IPv6 address can be obtained through a domain name system (DNS for short) server, and then judged.

Step 120, if the link layer header of the data packet does not contain the VLAN tag, perform link layer analysis on the received data packet to obtain the link layer data segment of the data packet.

Wherein, according to the existing Internet communication protocol technology, the data packet includes a link layer header and a link layer data segment before the link layer analysis is performed. The link layer data segment includes an IP layer header and an IP layer data segment.

Step 121, unpack the link layer data segment obtained above to obtain the IP layer header of the data packet.

Step 122, judge the IP protocol type of the data packet according to the IP protocol version number in the IP layer header of the data packet. Wherein, the IP protocol version number is a field in the IP layer header, indicating that the data packet adopts the IPv4 protocol or the IPv6 protocol.

Step 130, according to the determined IP protocol type, call the IPV4 protocol stack or IPv6 protocol stack preloaded in the user terminal to process the data packet.

Specifically, the general TCP/UDP protocol preloaded in the user terminal may be invoked through a socket application program interface (Socket Application Program Interface, Socket API for short) to realize network communication. In addition, dynamic host configuration protocol (abbreviation: DHCP) v4/v6, Internet Group Management Protocol v2/Multicast Listener Discovery Protocol v6 (abbreviation: IGMPv2/MLDv6), real-time streaming protocol (abbreviation: RTSP) v4/v6, Network Time Protocol (abbreviation: NTP) v4/v6 and other protocol stacks to realize IP services. Among them, by calling the API, terminal equipment support can be provided for interactive multimedia services coexisting under IPv4 and IPv6. The structure of the above-mentioned protocol stacks in the user terminal is shown in FIG. 1A .

Through the method described in this embodiment, the user terminal can support the IPv4/IPv6 dual protocol stack, so that it can be connected to service systems in two network environments, such as an interactive multimedia service system, at the same time. The service systems are respectively located in the IPv4 network and the IPv6 network, and provide services for users at the same time. When users use IPv4 or IPv6 services, the user terminal equipment can automatically call the IPv4 or IPv6 protocol stack to realize related functions. In addition, this embodiment can also be applied to user terminal equipment that provides IPv4 and IPv6 services as an operator, so as to realize its services, such as interactive multimedia services. This is conducive to the smooth transition from the IPv4 network environment to the IPv6 network environment.

Embodiment of the information sending method of the user terminal according to the present invention

This embodiment provides a method for sending information of a user terminal supporting IPv4/IPv6 dual protocol stack, as shown in FIG. 2 , including:

Step 201, the user terminal adds a corresponding VLAN tag to the link layer header of the data packet according to the IP protocol type of the data packet to be sent, and sends it to the access network device. Specifically, it is sent to the access network entry device in the access network device. Wherein, the user terminal may be a set-top box.

Step 202, the access network ingress device in the access network device maps the VLAN tag in the data packet to a corresponding permanent virtual circuit (Permanent Virtual Circuit, PVC for short). Wherein, the access network entrance device may be an asymmetric digital subscriber loop modem (abbreviation: ADSL MODEM) and other devices.

Step 203, the access network egress device among the access network devices sends the above data packet to the IPv4 service network or the IPv6 service network according to the mapped permanent virtual circuit. Wherein, the egress device of the access network may be a device such as a digital subscriber line access multiplexer (DSLAM for short).

Through the method described in this embodiment, the user terminal can send data information to the network environment supporting the IPv4 protocol stack and the network environment supporting the IPv6 protocol stack, thereby realizing information interconnection, which is conducive to the smooth transition from the IPv4 network environment to the IPv6 network environment.

Embodiment 1 of the user terminal of the present invention

This embodiment provides a user terminal. As shown in FIG. 3 , the user terminal 1 includes a receiving unit 10 and a sending unit 20 .

Wherein, the sending unit 20 is configured to add a corresponding virtual local area network mark in the link layer header of the data packet according to the IP protocol type of the data packet to be sent, and send it to the access network device. Then, the access network device sends the data packet to the IPv4 service network or the IPv6 service network according to the virtual local area network mark in the received data packet. The access network devices may include access network ingress devices and access network egress devices. For the specific processing process of the data packet by the access network device, reference may be made to the embodiment of the information sending method of the user terminal in the present invention, which will not be repeated here.

The receiving unit 10 includes a first module 11, a second module 12, a third module 13 and a fourth module 14, and its working principle is as follows:

The first module 11 is pre-loaded with an IPv4 protocol stack and an IPv6 protocol stack. When the user terminal 1 received the data packet, the second module 12 searched for the VLAN tag in the link layer header of the received data packet; the third module 13 judged the received data according to the VLAN tag found by the second module 12 The IP protocol type of the packet, that is to judge whether the data packet adopts the IPv4 protocol or the IPv6 protocol, and send the IP protocol type to the fourth module 14; the fourth module 14 calls the IP protocol type loaded in the first module according to the received IP protocol type The IPv4 protocol stack or IPv6 protocol stack in module 11 performs corresponding processing on the above data packets.

Through the device described in this embodiment, the IP protocol type adopted by the data packet is obtained by judging the VLAN tag, so that the user terminal can support the IPv4/IPv6 dual protocol stack, so that it can simultaneously communicate with the services under the two network environments Systems such as interactive multimedia service systems are connected. It realizes the smooth transition of the operator's business from the IPv4 network environment to the IPv6 network environment.

Embodiment 2 of the user terminal of the present invention

The receiving unit 10 in Embodiment 1 obtains the IP protocol type adopted by the data packet by judging the VLAN tag. However, in some actual applications, if the data packet is sent to a non-VLAN device, the VLAN switch will not add a VLAN tag to the data packet.

In order to solve this problem, this embodiment has been improved on the basis of Embodiment 1. As shown in FIG. In addition to the fourth module 14 , it further includes: a fifth module 15 , a sixth module 16 and a seventh module 17 . It works as follows:

The first module 11 is pre-loaded with an IPv4 protocol stack and an IPv6 protocol stack. When the user terminal 1 receives the data packet, the second module 12 searches for the VLAN tag in the link layer header of the received data packet; and, the fifth module 15 performs link layer analysis on the received data packet to obtain the data The link layer data segment of the packet; the sixth module 16 unpacks the link layer data segment obtained by the fifth module to obtain the IP layer header of the data packet. If the second module 12 fails to find the VLAN tag, that is, when the packet does not contain the VLAN tag, the information of the search failure is sent to the seventh module 17; when the second module 12 does not find the VLAN tag, the seventh module 17 According to the IP protocol version number in the IP layer header obtained by the sixth module 16, the IP protocol type of the data packet is judged, and the IP protocol type is sent to the fourth module 14; the fourth module 14 calls according to the received IP protocol type The IPv4 protocol stack or IPv6 protocol stack loaded in the first module 11 performs corresponding processing on the above data packets.

In addition, in order to realize network communication, an eighth module 18 and a ninth module 19 may also be set in the user terminal 1 . Wherein, the eighth module 18 is used to load the general TCP/UDP protocol; the ninth module 19 is used to call the TCP/UDP protocol loaded in the eighth module 18 through Socket API to realize network communication. Table 1 shows the IPv4/IPv6 dual protocol stack structure loaded in the user terminal 1 .

Table 1

IPv4 applications IPv6 applications Socket API General TCP/UDP   IPv4 protocol   IPv6 protocol data link layer Physical layer

With the device described in this embodiment, the IP protocol type adopted by the data packet is obtained by detecting the IP protocol version number in the IP layer header. Therefore, when the user terminal is a non-VLAN device, the purpose of enabling the user terminal to support the IPv4/IPv6 dual protocol stack is also achieved. Therefore, the scope of application of the user terminal is expanded.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. An information receiving method of a user terminal, characterized in that it comprises: When the user terminal receives the data packet, it searches for the virtual local area network mark in the link layer header of the data packet; Judging the IP protocol type of the data packet according to the found VLAN tag; According to the determined IP protocol type, the IPv4 protocol stack or the IPv6 protocol stack preloaded in the user terminal is invoked to process the data packet. 2. The information receiving method of the user terminal according to claim 1, wherein said searching the virtual local area network mark in the link layer header also includes: When the virtual local area network mark is not found, judge the IP protocol type of the data packet according to the IP protocol version number in the IP layer header of the data packet. 3. the information receiving method of user terminal according to claim 2, is characterized in that before judging the IP protocol type of described data packet according to described IP protocol version number, also comprises: Perform link layer analysis on the received data packet to obtain the link layer data segment of the data packet; Unpacking the link layer data segment to obtain the IP layer header of the data packet. 4. The information receiving method of the user terminal according to claim 1, wherein calling the IPv4 protocol stack or the IPv6 protocol stack to process the data packet comprises: The general TCP/UDP protocol preloaded in the user terminal is invoked through the socket API to implement network communication. 5. The information receiving method of the user terminal according to claim 1, characterized in that before searching the virtual local area network mark in the link layer header of the data packet, it also includes: If the destination address of the received data packet is a domain name address, the domain name address is converted into a corresponding IPv4 or IPv6 address by the domain name system server. 6. A method for sending information of a user terminal, characterized in that it comprises: According to the IP protocol type of the data packet to be sent, the user terminal adds a corresponding virtual local area network mark in the link layer header of the data packet, and sends it to the access network device; The access network device sends the data packet to an IPv4 service network or an IPv6 service network according to the VLAN tag of the data packet. 7. The information sending method of the user terminal according to claim 6, wherein the sending of the data packet by the access network device to the IPv4 service network or the IPv6 service network comprises: The access network ingress device in the access network device maps the virtual local area network label in the data packet to a corresponding permanent virtual circuit; The access network egress device among the access network devices sends the data packet to an IPv4 service network or an IPv6 service network according to the permanent virtual circuit. 8. A user terminal, characterized in that it comprises: The sending unit is used to add a corresponding virtual local area network mark in the link layer header of the data packet according to the IP protocol type of the data packet to be sent, and send it to the access network device; Receiver unit, including: The first module is used to load the IPv4 protocol stack and the IPv6 protocol stack; The second module is used to search the virtual local area network mark in the link layer header of the received data packet; The third module is used to judge the IP protocol type of the data packet according to the virtual local area network mark found by the second module, and send it to the fourth module; The fourth module is configured to call the IPv4 protocol stack or the IPv6 protocol stack loaded in the first module to process the data packet according to the received IP protocol type. 9. The user terminal according to claim 8, wherein the receiving unit further comprises: The fifth module is used to perform link layer analysis on the received data packet to obtain the link layer data segment of the data packet; The sixth module is configured to unpack the link layer data segment obtained by the fifth module to obtain the IP layer header of the data packet. The seventh module is used to judge the IP protocol type of the data packet according to the IP protocol version number in the IP layer packet header obtained by the sixth module when the second module does not find the virtual local area network mark, and send it to the second module Four modules. 10. The user terminal according to claim 8 or 9, wherein the receiving unit further comprises: The eighth module is used to load the general TCP/UDP protocol; The ninth module is used to call the TCP/UDP protocol loaded in the eighth module through the socket API to realize network communication.

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