CN104135549A - Data transmission method and device supporting diversified addressing modes - Google Patents

Abstract

The invention discloses a data transmission method and device supporting diversified addressing modes. The data transmission method and device are applied to a node in a data transmission network. The node at least supports one addressing mode. The method comprises the steps that a data request, comprising an address identification type supported by a target node, sent by a user is received; whether address identification types supported by the current node comprise the address identification type supported by the target node or not is judged; if yes, according to the preset address identification processing priority, the address identification which has the highest priority and is in the type supported by the target node is selected from the address identification supported by the current node, and the data request is forwarded to the next node according to the selected address identification. Due to the fact that on the basis that various addressing modes are supported by each routing node, the address identification which has the high priority and is supported by the target node is selected for forwarding a data packet, data forwarding efficiency is higher, the forwarding speed is higher, and meanwhile diversified service requirements are provided for the user.

Description

A data transmission method and device supporting diverse addressing modes

technical field

The present application relates to the technical field of computer networks, and more specifically, to a data transmission method and device supporting diversified addressing modes.

Background technique

The "thin waist" network architecture design has achieved great success, but after decades of development of the IP network, with the growth of the user scale and the development of business diversification, the current network addressing mechanism is facing severe challenges. Challenges are manifested in the change of user requirements, the enhancement of mobility requirements and the diversity of business transmission requirements.

The existing addressing modes are: addressing centered on autonomous domain, addressing centered on host, addressing centered on service and addressing centered on content. However, in the process of data transmission, each node only supports one addressing mode, which results in the singleness of data transmission and cannot provide diversified and all-round network services. Moreover, the existing data transmission method cannot support the evolution of the network, and cannot be effectively compatible with addressing methods that may appear in the future.

Contents of the invention

In view of this, the present application provides a data transmission method and device supporting diversified addressing modes, which are used to solve the problem that each node has a single addressing mode in the existing data transmission process, cannot provide diversified services, and cannot support network evolution The problem.

In order to achieve the above purpose, the proposed scheme is as follows:

A data transmission method, applied to a node in a data transmission network, where the node supports at least one addressing mode, the method includes:

receiving the data request sent by the user, the data request including the type of address identification supported by the destination node;

Judging whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node, if so, according to the preset address identifier processing priority, select the highest priority among the address identifiers supported by the current node and be The address identifier of the type supported by the destination node is determined as the first address identifier;

Forwarding the data request to a next-hop node according to the first address identifier.

Preferably, it also includes:

If the types of address identifiers supported by the current node do not include the types of address identifiers supported by the destination node, an error message is sent to the user.

Preferably, the judging whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node includes:

Sorting the types of address identifiers supported by the current node and the destination node respectively to obtain a first type sequence and a second type sequence;

Judging whether the same type item exists in the first type sequence and the second type sequence, and determining whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node according to the judgment result.

Preferably, according to the preset address identification processing priority, the address identification with the highest priority and the type supported by the destination node is selected among the types of address identification supported by the current node, and determined as the first address identification, including :

According to the preset address identification processing priority, the address identification supported by the destination node is sorted according to the priority from large to small;

Arrange the address identifiers supported by the destination node in order, select the address identifiers one by one, and judge whether the selected address identifier is the address identifier of the type supported by the current node, until the selected address identifier is the address identifier of the type supported by the current node , determining the currently selected address identifier as the first address identifier.

Preferably, the preset address identification processing priority is:

In descending order of priority, they are: content-based address identifier CID, service-based address identifier SID, host IP-based address identifier HID, and autonomous domain-based address identifier AID.

A data transmission device, applied to a node in a data transmission network, the node supports at least one addressing mode, the device includes:

A data receiving unit, configured to receive a data request sent by a user, where the data request includes the type of address identification supported by the destination node;

The first judging unit is used to judge whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node;

The first processing unit is configured to, when the judgment result of the first judging unit is yes, select the highest priority among the address identifiers supported by the current node and be supported by the destination node according to the preset address identifier processing priority The address identifier of the type is determined as the first address identifier;

A data forwarding unit, configured to forward the data request to a next-hop node according to the first address identifier.

Preferably, it also includes:

The second processing unit is configured to send an error message to the user when the judgment result of the first judgment unit is negative.

Preferably, the first judging unit includes:

The first sorting unit is configured to sort the types of address identifiers supported by the current node and the destination node respectively, to obtain a first type sequence and a second type sequence;

The address identification comparison unit is used to determine whether the same type item exists in the first type sequence and the second type sequence, and determine whether the type of the address identification supported by the current node includes the type of the destination node according to the judgment result. Types of address IDs supported.

Preferably, the first processing unit includes:

The second sorting unit is configured to sort the address identifiers supported by the destination node from large to small according to the priority according to the preset address identifier processing priority;

The first address identifier determination unit selects the address identifiers one by one according to the address identifiers supported by the destination node arranged in order, and judges whether the selected address identifier is an address identifier of the type supported by the current node until the selected address identifier is the current node The address identifier of the supported type determines that the currently selected address identifier is the first address identifier.

Preferably, the preset address identification processing priority is:

In descending order of priority, they are: content-based address identifier CID, service-based address identifier SID, host IP-based address identifier HID, and autonomous domain-based address identifier AID.

It can be seen from the above technical solutions that the data transmission method supporting diversified addressing modes provided by the embodiment of the present application is applied to a node in a data transmission network, and the node supports at least one addressing mode. , by receiving the data request sent by the user including the type of address identifier supported by the destination node, determine whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node, and if so, according to the preset address To identify the processing priority, select the address identification with the highest priority and the type supported by the destination node among the address identifications supported by the current node, determine it as the first address identification, and forward it to the next hop node according to the first address identification The data request. This application provides a polymorphic addressing method, that is, on the basis that each routing node supports multiple addressing methods, the data packet is forwarded by selecting the address identifier with high priority and supported by the destination node, so that the data forwarding Higher efficiency and faster forwarding speed, while providing users with diversified service requirements. Moreover, the solution of the present application supports the evolution of the network, and is also compatible with addressing modes that may appear in the future.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a flowchart of a data transmission method disclosed in an embodiment of the present application;

FIG. 2 is a flow chart of another data transmission method disclosed in the embodiment of the present application;

Fig. 3 is a flow chart of an address identification judgment method disclosed in the embodiment of the present application;

FIG. 4 is a flowchart of a method for determining a first address identifier disclosed in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a data transmission device disclosed in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another data transmission device disclosed in the embodiment of the present application;

FIG. 7 is a schematic structural diagram of a first judging unit disclosed in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a first processing unit disclosed in an embodiment of the present application.

Detailed ways

In order to facilitate the following understanding, the nouns or abbreviations used in the text are explained here:

Autonomous domain-based address identification: (Administrative Domain-based IDentifier, AID), the entire network is divided into autonomous domains according to specific address locations or administrative affiliation. Each area has a globally unique autonomous domain identification. This identification is usually Indicates a geographic location in the network.

Address identification based on the host IP: (Host-based IDentifier, HID), the host as the main body of network communication, interacting with the host, obtaining content or services is to achieve the purpose of communication through the host identification, only the ultimate purpose of obtaining content or services They are all hidden in the packet data load with the host as the thin waist structure. Only after reaching the host and delivering the packet content to the upper application process, can the real intention of communication be obtained.

Service-based address identification: (Service-based IDentifier, SID), with the change of network communication mode, network users access the network more often to obtain network services. The service-centric addressing method is a means to express communication intention more directly, eliminating the redundancy of communication address translation.

Content-based IDentifier: (Content-based IDentifier, CID), with the proposal of NDN (Named Data Networking), researchers have aroused widespread interest and research upsurge in the network of content naming. The basic starting point of this mechanism is that the repeated access and transmission of the same content greatly consumes network resources, and there is a large amount of redundant traffic in network communication. The introduction of a structure with the content name as the thin waist can avoid obtaining data from the data source ( Routing nodes in the network have a cache function), thus saving network resources.

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The data transmission method supporting multiple addressing modes disclosed in this application is applied to a node in a data transmission network, and the node supports at least one addressing mode, that is, at least one type of address identification. We can upgrade or transform each routing node in advance to meet the above requirements.

Referring to FIG. 1 , FIG. 1 is a flowchart of a data transmission method disclosed in an embodiment of the present application.

As can be seen from Figure 1, the method includes:

Step 100: Receive the data request sent by the user, the data request includes the type of address identification supported by the destination node;

Specifically, the data request sent by the user is in the form of a data packet, which contains information about the requested destination node, such as the type of address identifier supported by the destination node. For example, the destination node supports address identifiers of AID and HID types.

Step 110: Determine whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node, and if so, execute step 120;

The types of address identifiers supported by each node receiving the data request are not exactly the same. Here, it is necessary to determine whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node. For example, if the current node supports address identifiers of HID and AID types, but the destination node only supports address identifiers of HID type, then the types of address identifiers supported by the current node include the types of address identifiers supported by the destination node. If the current node supports only HID-type address identifiers and the destination node only supports AID-type address identifiers, the types of address identifiers supported by the current node do not include the types of address identifiers supported by the destination node.

Step 120: According to the preset address identifier processing priority, select the address identifier with the highest priority and the type supported by the destination node among the address identifiers supported by the current node, and determine it as the first address identifier;

Specifically, we generally choose to define address identification processing priority according to address identification compatibility, such as: AID<HID<SID<CID, where CID represents content-based address identification, SID represents service-based address identification, and HID represents host-based The IP address identifier and AID represent the address identifier based on the autonomous domain. Here, only several existing common address identifiers are listed. Of course, if there are other types of address identifiers, such as addressing modes that may appear in the future, they can also be added to the above sequence.

In terms of data forwarding efficiency and speed, an address identifier with a higher priority is more advantageous than an address identifier with a lower priority. Therefore, we select an address identifier supported by the destination node and having a higher priority among the address identifiers supported by the current node, and determine it as the first address identifier.

Step 130: Forward the data request to a next-hop node according to the first address identifier.

Specifically, the data request is forwarded according to the first address identifier determined above. Each node operates according to the above process.

The data transmission method provided by the embodiment of this application is applied to a node in the data transmission network, and the node supports at least one addressing mode. On this basis, by receiving the type of address identification supported by the destination node, the According to the data request, determine whether the type of address identification supported by the current node includes the type of address identification supported by the destination node. If so, according to the preset address identification processing priority, select the priority among the address identification supported by the current node The address identifier with the highest level and the type supported by the destination node is determined as the first address identifier, and the data request is forwarded to the next-hop node according to the first address identifier. This application provides a polymorphic addressing method, that is, on the basis that each routing node supports multiple addressing methods, the data packet is forwarded by selecting the address identifier with high priority and supported by the destination node, so that the data forwarding Higher efficiency and faster forwarding speed, while providing users with diversified service needs. Moreover, the solution of the present application supports the evolution of the network, and is also compatible with addressing modes that may appear in the future.

Referring to FIG. 2, FIG. 2 is a flowchart of another data transmission method disclosed in the embodiment of the present application.

1 and 2, it can be seen that in step 110 "judging whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node" is no, the method may also include:

Step 140: Send an error message to the user.

Here, the process of sending the error information to the user may be to send the error information to the source node through each node in reverse according to the data transmission link.

Referring to FIG. 3 , FIG. 3 is a flow chart of a method for judging an address identifier disclosed in an embodiment of the present application.

The above step 110 "judging whether the type of address identifier supported by the current node includes the type of address identifier supported by the destination node" can be implemented in the following manner:

Step 300: Sorting the types of address identifiers supported by the current node and the destination node respectively to obtain a first type sequence and a second type sequence;

Specifically, the sorting may be performed according to the processing priority identified by the address, or may be sorted in any manner.

Step 310: Determine whether the same type item exists in the first type sequence and the second type sequence, and determine whether the type of address identifier supported by the current node includes the address identifier supported by the destination node according to the judgment result type.

Specifically, the two type sequences respectively include several type items, and by comparing the two type sequences, it can be determined whether they have the same type item. If the two have the same type item, then determine that the type of address identifier supported by the current node includes the type of address identifier supported by the destination node; otherwise, determine that the type of address identifier supported by the current node does not include the type of address identifier supported by the destination node. Types of address IDs supported.

Only when the type of address identifier supported by the current node includes the type of address identifier supported by the destination node, data forwarding can be completed; otherwise, data forwarding cannot be performed.

Referring to FIG. 4 , FIG. 4 is a flowchart of a method for determining a first address identifier disclosed in an embodiment of the present application.

As shown in Figure 4, the above step 120 can be implemented in the following manner:

Step 400: sort the address identifiers supported by the destination node in descending order according to the preset address identifier processing priority;

Step 410: Arrange the address identifiers supported by the destination node in order, select the address identifiers one by one, and judge whether the selected address identifiers are the address identifiers of the type supported by the current node, until the selected address identifiers are the type supported by the current node address identifier, and determine the currently selected address identifier as the first address identifier.

Here, the first address identifier selected from the address identifiers supported by the destination node must firstly be an address identifier of a type supported by the current node, and secondly be an address identifier with a higher priority.

In order to facilitate the understanding of the above solutions, we use the following examples to illustrate:

Assume that the addressing process requested by the user goes through node A→B→C→D. Address IDs are sorted according to processing priority as AID<HID<SID<CID.

Wherein, the address identifiers supported by the destination node D are AID, HID, SID and CID;

The address identifiers supported by node A are AID, HID and SID;

The address identifiers supported by Node B are AID and HID;

The address ID supported by node C is AID.

The types of address identifiers supported by nodes A, B, and C all include the types of address identifiers supported by the destination node.

After node A receives the data request, it first selects the CID with the highest priority among AID<HID<SID<CID, and judges that its own node A does not support the address identifier of the CID type, then falls back to select SID, and judges that its own node A supports the SID type address identifier, the data request is forwarded to Node B according to the address identifier of the SID type.

After node B receives the data request, it first selects the CID with the highest priority among AID<HID<SID<CID, and judges that its own node B does not support the address identifier of the CID type, then falls back to select SID, and judges that its own node B does not support the SID type If the address identifier of the HID type is selected, the HID is selected back, and the node B judges that the address identifier of the HID type is supported by itself, and forwards the data request to the node C according to the address identifier of the HID type.

After node C receives the data request, it first selects the CID with the highest priority among AID<HID<SID<CID, and judges that its own node C does not support the address identifier of the CID type, then falls back to select SID, and judges that its own node C does not support the SID type If the address identifier of the node C supports the address identifier of the AID type, it will fall back to select HID. If it is judged that its own node C does not support the address identifier of the HID type, it will fall back to select AID. If it is judged that its own node C supports the address identifier of the AID type, the data request will be forwarded to Destination node D.

The above example introduces the complete process of data forwarding. For the process that cannot complete the above process, please refer to the following example:

Assume that the addressing process requested by the user goes through node A→B→C→D. Address IDs are sorted according to processing priority as AID<HID<SID<CID.

Wherein, the address identifiers supported by the destination node D are AID, HID and SID;

The address identification supported by node A is only CID;

The address identifiers supported by Node B are AID and HID;

The address ID supported by node C is AID.

It can be seen that node A here only supports address identifiers of CID type, but the destination node does not support address identifiers of CID type, so node A will not be able to complete data forwarding.

It should be noted that, in order to avoid global routing, we can define the range of the address identifier and convert an original value into a range value. For example, the original routing list records the next-hop addresses corresponding to CID values 100, 101, 102...200, but it is possible that the next-hop addresses corresponding to CID values 100-150 are all the same. To this end, we define a range of CID values: 100-150, and the next hop addresses corresponding to the range values are the same. In this way, only the CID values 100-150 and their corresponding next-hop addresses need to be recorded in the routing list, which greatly saves routing overhead.

Other types of address identifiers can also be implemented in the above manner, but the criteria for demarcating the range are different.

The data transmission device provided by the embodiment of the present application is described below, and the data transmission device described below and the data transmission method described above may be referred to in correspondence.

Referring to FIG. 5 , FIG. 5 is a schematic structural diagram of a data transmission device disclosed in an embodiment of the present application. The data transmission device is applied to a node in a data transmission network, and the node supports at least one addressing mode.

As shown in Figure 5, the device includes:

A data receiving unit 51, configured to receive a data request sent by a user, where the data request includes an address identification type supported by the destination node;

The first judging unit 52 is configured to judge whether the types of address identifiers supported by the current node include the types of address identifiers supported by the destination node;

The first processing unit 53 is configured to select the destination node with the highest priority among the address identifiers supported by the current node according to the preset address identifier processing priority when the judgment result of the first judgment unit 52 is yes The address identifier of the supported type is determined as the first address identifier;

Specifically, according to the processing priority from high to low, they are: content-based address identifier CID, service-based address identifier SID, host IP-based address identifier HID, and autonomous domain-based address identifier AID.

A data forwarding unit 54, configured to forward the data request to a next-hop node according to the first address identifier.

Optionally, FIG. 6 illustrates a schematic structural diagram of another data transmission device disclosed in the embodiment of the present application.

5 and 6, it can be seen that the data transmission device may further include:

The second processing unit 61 is configured to send an error message to the user when the judgment result of the first judgment unit 52 is negative.

Optionally, FIG. 7 illustrates a schematic structural diagram of the first judging unit disclosed in the embodiment of the present application.

As shown in Figure 7, the first judging unit 52 includes:

The first sorting unit 521 is configured to sort the types of address identifiers supported by the current node and the destination node respectively, to obtain a first type sequence and a second type sequence;

The address identification comparison unit 522 is configured to determine whether the same type item exists in the first type sequence and the second type sequence, and determine whether the type of address identification supported by the current node includes the destination node according to the judgment result The types of address IDs supported.

Optionally, FIG. 8 illustrates a schematic structural diagram of the first processing unit disclosed in the embodiment of the present application.

As shown in Figure 8, the first processing unit 53 includes:

The second sorting unit 531 is configured to sort the address identifiers supported by the destination node in descending order according to the preset address identifier processing priority;

The first address identifier determination unit 532 selects the address identifiers one by one according to the address identifiers supported by the destination nodes arranged in order, and judges whether the selected address identifier is an address identifier of the type supported by the current node until the selected address identifier is the current address identifier. The address identifier of the type supported by the node determines that the currently selected address identifier is the first address identifier.

The data transmission device provided by the embodiment of this application is applied to a node in a data transmission network. The node supports at least one addressing mode. On this basis, by receiving the type of address identification supported by the destination node, the data request, determine whether the type of address identifiers supported by the current node includes the type of address identifiers supported by the destination node, and if so, process the priority according to the preset address identifiers, and select priority among the address identifiers supported by the current node The address identifier with the highest level and the type supported by the destination node is determined as the first address identifier, and the data request is forwarded to the next-hop node according to the first address identifier. This application provides a polymorphic addressing device, that is, on the basis that each routing node supports multiple addressing modes, the data packet is forwarded by selecting the address identification with high priority and supported by the destination node, so that the data forwarding Higher efficiency and faster forwarding speed, while providing users with diversified service requirements. Moreover, the solution of the present application supports the evolution of the network, and is also compatible with addressing modes that may appear in the future.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a data transmission method of supporting diversified addressing system, is characterized in that, is applied in the node in data transmission network, and this node is at least supported a kind of addressing system, and the method comprises:

Receive the request of data that user sends, described request of data comprises the type of the address designation that destination node is supported;

Judge the type that whether comprises the address designation that destination node supports in the type of the address designation that present node is supported, if, according to default address designation processing priority, in the address designation of supporting at present node, choose the address designation of priority type the highest and that support for destination node, be defined as the first address designation;

According to described the first address designation down hop node, forward described request of data.

2. data transmission method according to claim 1, is characterized in that, also comprises:

If do not comprise the type of the address designation of destination node support in the type of the address designation that present node is supported, send error message to described user.

3. data transmission method according to claim 1, is characterized in that, whether comprises the type of the address designation that destination node supports in the described type that judges the address designation that present node is supported, comprising:

The type of the address designation that present node and destination node are supported sorts respectively, obtains first kind sequence and Second Type sequence;

Judge in described first kind sequence and described Second Type sequence whether have identical type item, and according to judged result, determine the type that whether comprises the address designation that destination node supports in the type of the address designation that present node is supported.

4. data transmission method according to claim 1, it is characterized in that, described according to default address designation processing priority, in the type of the address designation of supporting at present node, choose the address designation of priority type the highest and that support for destination node, be defined as the first address designation, comprise:

According to default address designation processing priority, the address designation that destination node is supported sorts from large to small according to priority;

The address designation that the destination node of arranging is in order supported, successively choose address designation, and whether the address designation chosen of judgement is the address designation of the type supported of present node, until the address designation of the type that the address designation of choosing is present node to be supported determines that the current address designation of choosing is the first address designation.

5. according to the data transmission method described in claim 1-4 any one, it is characterized in that, described default address designation processing priority is:

According to priority from high to low, be followed successively by: content-based address designation CID, the address designation SID based on service, the address designation HID based on host ip and the address designation AID based on Autonomous Domain.

6. a data transmission device of supporting diversified addressing system, is characterized in that, is applied in the node in data transmission network, and this node is at least supported a kind of addressing system, and this device comprises:

Data receiver unit, the request of data sending for receiving user, described request of data comprises the address designation type that destination node is supported;

The first judging unit, for judging whether the type of the address designation that present node is supported comprises the type of the address designation of destination node support;

The first processing unit, for when judgment result is that of described the first judging unit is, according to default address designation processing priority, in the address designation of supporting at present node, choose the address designation of priority type the highest and that support for destination node, be defined as the first address designation;

Data retransmission unit, for forwarding described request of data according to described the first address designation down hop node.

7. data transmission device according to claim 6, is characterized in that, also comprises:

The second processing unit, when the determination result is NO at described the first judging unit, sends error message to described user.

8. data transmission device according to claim 6, is characterized in that, described the first judging unit comprises:

The first sequencing unit, sorts respectively for the type of address designation that present node and destination node are supported, obtains first kind sequence and Second Type sequence;

Address designation comparing unit, for judging whether described first kind sequence and described Second Type sequence exist identical type item, and according to judged result, determine the type that whether comprises the address designation that destination node supports in the type of the address designation that present node is supported.

9. data transmission device according to claim 6, is characterized in that, described the first processing unit comprises:

The second sequencing unit, for the address designation processing priority according to default, the address designation that destination node is supported sorts from large to small according to priority;

The first address designation determining unit, the address designation that the destination node of arranging is in order supported, successively choose address designation, and whether the address designation chosen of judgement is the address designation of the type supported of present node, until the address designation of the type that the address designation of choosing is present node to be supported determines that the current address designation of choosing is the first address designation.

10. according to the data transmission device described in claim 6-9 any one, it is characterized in that, described default address designation processing priority is:

According to priority from high to low, be followed successively by: content-based address designation CID, the address designation SID based on service, the address designation HID based on host ip and the address designation AID based on Autonomous Domain.