WO2011032405A1 - Method and system for interaction between asn and mapping-forwarding plane, and asn - Google Patents

Method and system for interaction between asn and mapping-forwarding plane, and asn Download PDF

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Publication number
WO2011032405A1
WO2011032405A1 PCT/CN2010/074169 CN2010074169W WO2011032405A1 WO 2011032405 A1 WO2011032405 A1 WO 2011032405A1 CN 2010074169 W CN2010074169 W CN 2010074169W WO 2011032405 A1 WO2011032405 A1 WO 2011032405A1
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WO
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Prior art keywords
access
packet
service node
mapping
unreachable
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PCT/CN2010/074169
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French (fr)
Chinese (zh)
Inventor
何辉
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中兴通讯股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information

Abstract

The present invention discloses a method for interaction between an access service node and a mapping-forwarding plane. The method is applied to an identity and location separation network framework. The method includes: configuration strategies for messages for which identity location mapping information cannot be found, are added in the access service node; in the process of the interaction between the access service node and the mapping-forwarding plane, after receiving a data message transmitted from a user terminal, the access service node queries the identity location mapping information based on the access identifier of the data message; if the identity location mapping information cannot be found, the data message are processed based on the configuration strategies. The present invention also discloses a corresponding system and an access service node (ASN). The invention reduces invalid messages delivered from the ASN to the mapping-forwarding plane.

Description

The method of the ASN and the mapping forwarding plane interaction system and ASN

FIELD

The present invention relates to communications technologies, and in particular relates to a method of access service node (Access Service Node, ASN) at a position separated from the host identifier and network mapping frame forwarding plane interaction system and ASN. Background technique

Transmission control protocol widely used conventional Internet / Internet Protocol (Transmission Control Protocol / Internet Protocol, TCP / IP) protocol IP address has a dual function: both as the position of the communication terminal host network interface in the network layer of the network topology identity, and the identity of the host as the host network interface transport layer. TCP / IP protocol design did not consider the situation at the beginning of host mobility. However, when the host moved more and more common, semantic overload drawback of this IP address has become increasingly evident. When the IP address of a host of changes, not only the route to be changed, the communication terminal host identity also changes, this will lead to increasingly heavy routing load, and change the identity of the host application and will lead to interruption of the connection. Destination host identity identifier and location separation issues raised in order to solve the semantic IP address of overload, the route is heavily loaded and security issues, the dual function of IP addresses were separated achieve mobility, multi-homing properties, IP address dynamic reallocation to reduce the load and visits and other next-generation Internet routing between different networks support regional issues.

IP-based network router implementation is one relating to the identity and location identifier separated solutions, the identity of the isolated network frame shown in Figure 1:

In this framework, for the realization of the mapping forwarding plane, we propose a distributed hash table (Distributed Hash Table, DHT) to realize the mapping forwarding plane manner, in this method, on finding all ASN identification and location mapping information packets must be delivered to the mapping forwarding to find the identity and location mapping information (ie access identifier (access identifier, AID) - route identification (routing identifier, RID) mapping information) and a forwarding plane, so ASN delivered to the mapping forwarding plane of the number of invalid packets will be more, increasing the burden on mapping forwarding plane. SUMMARY

The present invention is to solve the technical problem is to provide a method and an access node serving the mapping forwarding plane interaction system and the ASN, this improved method and system can reduce the processing load of the mapping forwarding plane.

To solve the above problems, the present invention provides a method of access service node and the mapping forwarding plane interaction network for the identity and location separate frame, comprising:

Increased allocation strategy for finding out the identity and location mapping information in the article 4 Burgundy access service node; and

Interaction in the plane of the access service node mapping forwarding, when the access service node receives a data packet sent by a user terminal, according to the data packet to find the identity of the access identification and location mapping information, If you can not find the identification and location mapping information, according to the configuration policy processing data packets.

The strategy is to store and forward configuration, the first packet forwarding and discard the first packet of one or more.

The configuration is the first packet discard policy based on the policy configuration processing step of data packets comprises:

When the access point receives service to the user terminal transmits data packets, the data packets if finding out the identity and location of the mapping information, discards the data packet;

The method further comprises:

The access service node to record the data packet access identification; and

For the next received data packet identifier of the access, the next received data packets are discarded.

When the configuration headed packet forwarding policy, the policy processing step according to the configuration data packet comprising:

The access service node transmits the data packet to the mapping forwarding plane; and if the mapping information mapping forwarding plane to find the identity and location of the data packet is not the access to the mapping forwarding plane the service node sends unreachable packets, the unreachable Gen the unreachable packets comprising packet access identification;

The method further comprises:

The recording of the access service node unreachable packet access identification; and

For the next received data packet said unreachable packets discards the access identifier. When the configuration policy to store a forwarding policy processing step according to the configuration data packet comprising:

The access service node stores the data packet to the serving access node; the access service node forwarding plane sends a query message to the map, the data of the query message packet contains the access identifier to query the identity and location mapping information; and

If the mapping forwarding plane not find the identity and location information of the map data packets, the mapping forwarding plane to the access service node sends unreachable packets, the unreachable message packets comprising the unreachable the access identifier;

The method further comprises:

The recording of the access service node unreachable packet access identification; and

For the next received data packet unreachable packet access identifier, the next received data packet stored in the access service node.

The policy prior to the step of processing the configuration data packets, the method further comprising: the access service node is configured to support the number of entries in store and forward, the number of packets per time and storage options.

The processing step before the policy of the configuration data packet, the method further comprising: the access node serving a configuration aging time if the aging time is, the access to the data packet identification is processed in accordance with the configuration policy .

To solve the above problems, the present invention further provides an access node and the mapping forwarding plane interaction system for the identity and location separation network frame, the system comprising access service node and the mapping forwarding plane;

The access service node arranged to: increase the allocation policy mapping information for finding out the identity and location of the packet; and the mapping forwarding plane interacts, when the access node serving the user terminal receives the transmitted data packet hereinafter, the mapping to find the identity and location information according to the access identifier of the data packet, if not find the identity and location map information, according to the configuration data packet processing policy; the mapping forwarding plane is configured to: access the the service node to interact.

The strategy is to store and forward configuration, the first header packet forwarding and discarding one or more Gen ^ in; the access service node is configured to: when the first packet is arranged to discard policy, process the data packets as follows Article: upon receiving the user terminal to transmit data packets, if finding out the identity and location information of the map data packets, discards the data packet; and

The access service node is further configured to: identify the data record access message; and for the next time the data packet is received identifier of the access, the next received data packets are discarded; or ,

The access service node is configured to: when the configuration policy headed packet forwarding, the data packet to the mapping forwarding plane;

The mapping forwarding plane is configured to: if not find the identity and location information of the map data message, send the message to reach without the access node serving the unreachable message comprising the unreachable packets access identification; and

The access service node is further configured to: record the unreachable packet access identification; and for the packet data access identification of the next received unreachable packet discards;

or,

The access service node is configured to: when the configuration policy to store and forward, store the data packet to the serving access node; forwarding plane sends a query message to the mapping, the query message access identifier contained in the data message to query the identity and location mapping information; the mapping forwarding plane is configured to: if not find the identity and location information of the map data message to the access service unreachable node sends packets, the unreachable message comprising the unreachable packet access identification; and

The access service node is further configured to: record the unreachable packet access identification; and for the next received data packet unreachable packet access identifier, the next received storing the data packet to the serving access node. The access service node is further configured to: configure an aging time if the aging time is, the access identifier data packets processed according to the configured policy.

An access service node, a frame identifier separation network, the access service node arranged to:

Increased allocation strategy for finding out the identity and location mapping information packet; and

Interact with the mapping forwarding plane, when the access service node receives a data packet sent by a user terminal, to find the identity and location information of the mapping identifier according to the access data packet, if not find the identity and location information mapping , according to the configuration data packet processing policy.

The strategy is to store and forward configuration, the first header and packet forwarding · ^ discard one or more of. The access service node is configured to: when the first packet is arranged to discard policy, the user terminal receives the transmitted data packet, if finding out the identity and location information of the map data message, discard the data message; and

The access service node is further configured to: identify the data record access message; and for the next time the data packet is received identifier of the access, the next received data packets are discarded; or ,

The access service node is configured to: when the configuration packet forwarding policy headed, to send the data packet to the mapping forwarding plane; if the mapping forwarding plane location mapping to find the identity of the data packets not information is transmitted to the access service node unreachable packets, the unreachable message comprising the unreachable packet access identification; and

The access service node is further configured to: record the unreachable packet access identification; and for the packet data access identification of the next received unreachable packet discards;

or,

The access service node is configured to: when the configuration policy to store and forward, store the data packet to the serving access node; forwarding plane sends a query message to the mapping, the query message access identifier contained in the data message to query the identity and location mapping information; if the mapping forwarding plane not find the identity and location information of the map data message is transmitted to the access service node is unreachable packet, the packet unreachable unreachable message comprises the identifier of the access; and the access service node is further configured to: record the unreachable packet access identification; and for the next received the data packets unreachable packet access identifier, the next received data packet stored in the access service node.

The access service node is further configured to: configure an aging time if the aging time is, the access identifier data packets processed according to the configured policy.

With the above method and system reduces the ASN delivered to the mapping invalid packet forwarding plane. In one embodiment, the following advantages can also be obtained: for finding packet mapping relationship may be selected according to different processing strategies ASN different network conditions; number of invalid access identification for anomalies (such as attack) produced ( Access Identifier, AID) packets, by unreachable packets known valid AID information on AID, thereby effectively dropped on AID; allows discarding on the ASN, for some non-mapping between packets not re-entering mapping forwarding plane, reducing the burden on the mapping forwarding plane. Brief Description

FIG 1 is a topography identity separation network in the prior art;

Embodiment 2 FIG plane interactive flowchart of the ASN and the mapping forwarding the present invention. Preferred embodiment of the present invention.

The present invention provides a method of increasing the ASN for finding out the mapping relationship · ^ text processing options, this treatment option can reduce the number of planes delivered to the mapping forwarding of invalid messages.

The following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

The main object of the present embodiment includes:

ASN can choose to not find out the identity and location mapping information of the message store and forward or deliver to forward or discard strategy;

Further, you can achieve the following objectives:

ASN may be configured to store and forward packets on time; ASN be extended mapping forwarding plane defined interaction records invalidate the AID, AID for such discarded directly;

Record information for the AID is invalid due to aging mechanisms.

In response to these objectives, the process flow for the original ASN some changes were as follows: First, increase the allocation strategy for finding out the identity and location mapping information in the text of Gen 4 ASN; wherein the configuration policy can be a store and forward, the first packet forwarding or discarding one or more packets in the first allocation strategy according to the network may choose to use different conditions;

Wherein the network condition may be: When the trusted network can be configured to forward direct delivery; when the network is not trusted, can choose to configure the drop and the like;

For the store and forward may be further extended to support the number of entries in the configuration store and forward, the number of packets per entry Gen 4, storage time and other options;

However, since the purpose of each batch of the same AID AID packets generated in the ASN same, so the configuration object is to control the number of entries in the entry table of capacity; storage time is the longest storage time in order to control the data packet to avoid packet Wen fill the cache device;

Secondly, when the ASN receives a data packet sent by the user terminal, the process of learning the mapping relationship based on the configuration policies, process the data packet is completed;

Wherein, if the initial packet discard policy configuration, when the user terminal ASN receives data transmitted packet, if not find the mapping between data packets, the packets may be discarded;

If the store is configured to forward, when receiving the user terminal ASN data packets transmitted to, if not the map information to find the identity and location of the data packets may be stored to the ASN, while constructing a query packet, forwarding plane sends a query to the mapping mapping information the identity and location; if the initial packet forwarding arranged, when receiving the user terminal ASN data transmitted packet, sends it to the mapping forwarding plane, if not find the mapping forwarding plane identification and location data packet mapping information, the mapping forwarding plane sent to the ASN unreachable packets, including unreachable AID, the ASN recording unreachable AID, the AID of such data for the next received packet be lost ■ ^ abandoned treatment. In the case of another embodiment, also be configured for the aging time is not up to the entry, the aging mechanism increases, i.e., not to the aging time, if the AID data packet is not learned ^ Gen mapping the identity and location information, such AID data packet discards, if the aging time to ensure that the aging time after the AID of such data packets triggers a new learning process (i.e., when the ASN of the received data packets after the AID, re forwarding plane projection query message) to the map, thus avoiding malicious DOS attacks.

In the case of another embodiment, can also be forwarded by the storage configuration for the aging time of packets, increasing the aging mechanism, i.e., not to the aging time, if the AID data packet does not learn the identity and location mapping information, such AID data packet stored on the ASN, if the aging time is up, then store these ^ ^ discarded, thus avoiding malicious DOS attacks will ASN empty the cache consumption.

FIG 2 is a complete extension above the ASN and the mapping forwarding plane interaction, includes the following steps:

Step 201: After the source ASN (ASN1) received by the terminal access side network data packets sent, less time to find the mapping relationship, for further processing in accordance with the configuration policy;

Which, if configured, led by dropped packets, then look for less than a mapping relationship when discards the policy configuration;

If configured to store and forward, when looking at less than identification and location mapping information, the data file storage, while constructing queries * ^ sending to the mapping forwarding plane;

If the configuration headed packet forwarding, the data packet delivered to the mapping forwarding plane;

Step 202: the mapping forwarding plane receiving a query message, look for the identity and location mapping information (look on the identity location register (ILR)), when the identification and location mapping information can not find the time to produce a source ASN unreachable message is sent to ;

Step 203: The source ASN received and processed unreachable messages, record unreachable AID information packets; Step 204: The next time a source ASN receiving a data packet that AID and look for identification and location mapping information found in the packet AID unreachable, packets are discarded;

Step 205: unreachable information when the aging time, namely the aging timer to save unreachable aging information, allowing users to stream data packets can trigger learning process identification and location mapping information through new data;

Step 206: the source ASN receiving a data packet of the AID, the process returns to step 202; if this can learn the identity and location of the mapping information, the data may be sent to the encapsulation Gen peer communication.

Industrial Applicability

The present invention reduces the ASN delivered to the mapping invalid packet forwarding plane. In one embodiment, the following advantages can also be obtained: for finding packet mapping relationship may be selected according to different processing strategies ASN different network conditions; number of invalid access identification for anomalies (such as attack) generated packets, packets can not reach known information on invalid AID AID, thereby effectively dropped on AID; allows discarding on the ASN, for the portion of the message is no longer free to enter the mapping relationship mapping forwarding plane, reduce the burden on the mapping forwarding plane.

Claims

Claims
1. A method of access service node and the mapping forwarding plane interaction network for the identity and location separate frame, comprising:
Add location information mapping "^ text configuration policies for finding out the identity on the access service node; and
Interaction in the plane of the access service node mapping forwarding, when the access service node receives a data packet sent by a user terminal, according to the data packet to find the identity of the access identification and location mapping information, If you can not find the identification and location mapping information, policy processing the data packet according to the configuration.
2. The method as claimed in claim 1, wherein,
The strategy is to store and forward configuration, the first packet forwarding and discard the first packet of one or more.
3. The method according to claim 2, wherein,
The configuration is the first packet discard policy, the policy process step according to the configuration data packet comprising:
When the access point receives service to the user terminal transmits data packets, the data packets if finding out the identity and location of the mapping information, discards the data packet;
The method further comprises:
The access service node to record the data packet access identification; and
For the next received data packet identifier of the access, the next received data packets are discarded.
4. The method as claimed in claim 2, wherein
When the configuration headed packet forwarding policy, the policy according to the processing step of the configuration data packet comprises:
The access service node transmits the data packet to the mapping forwarding plane; and if the mapping information mapping forwarding plane to find the identity and location of the data packet is not the access to the mapping forwarding plane the service node sends unreachable packets, the unreachable message comprising the text unreachable Gen access identification; the method further comprising:
The recording of the access service node unreachable packet access identification; and
For the next received data packet said unreachable packets discards the access identifier.
5. The method according to claim 2, wherein,
The step of storing the configuration policy is forward, the process according to the configuration policy data packets comprising:
The access service node stores the data packet to the serving access node; the access service node forwarding plane sends a query message to the map, the data of the query message packet contains the access identifier to query the identity and location mapping information; and
If the mapping forwarding plane not find the identity and location information of the map data packets, the mapping forwarding plane to the access service node sends unreachable packets, the unreachable message packets comprising the unreachable the access identifier;
The method further comprises:
The recording of the access service node unreachable packet access identification; and
For the next received data packet unreachable packet access identifier, the next received data packet stored in the access service node.
Before 6. The method of claim 5, wherein said step of policy processing according to the configuration data packet, the method further comprising:
The access service node is configured to support the number of entries in store and forward, the number of packets per entry time and storage options.
Before 7, 3 or 4 or method as claimed in claim 5, wherein said step of policy processing according to the configuration data packet, the method further comprising:
The access service node a configuration aging time if the aging time is, the access to the data packet identification is processed according to the configured policy.
8, an access service node and the mapping forwarding plane interaction system for the identity and location separation network frame, the system comprising access service node and the mapping forwarding plane,
The access service node arranged to: increase the allocation policy mapping information for finding out the identity and location of the packet; and the mapping forwarding plane interacts, when the access node serving the user terminal receives the transmitted data packet hereinafter, the mapping to find the identity and location information according to the access identifier of the data packet, if not find the identity and location map information, according to the configuration data packet processing policy; the mapping forwarding plane is configured to: access the the service node to interact.
9. The system as claimed in claim 8, wherein,
The strategy is to store and forward configuration, the first header and packet forwarding · ^ discarded in one or more of; the access service node is configured to: when the first packet is arranged to discard policy, process the data as follows message: when the user terminal receives the transmitted data packet, if finding out the identity and location information of the map data packets, discards the data packet; and
The access service node is further configured to: record the data packet access identification; and for the next time the data packet is received identifier of the access, the next received data packet discarding; or,
The access service node is configured to: when the configuration policy headed packet forwarding, the data packet to the mapping forwarding plane;
The mapping forwarding plane is configured to: if not find the identity and location information of the map data message, send the message to reach without the access node serving the unreachable message comprising the unreachable packets access identification; and
The access service node is further configured to: record the unreachable packet access identification; and for the packet data access identification of the next received unreachable packet discards;
or,
The access service node is configured to: when the configuration policy to store and forward, store the data packet to the serving access node; forwarding plane sends a query message to the mapping, the query message access identifier contained in the data message to query the identity and location mapping information; the mapping forwarding plane is configured to: if not find the identity and location information of the map data message to the access service unreachable node sends packets, the unreachable message comprising the unreachable packet access identification; and
The access service node is further configured to: record the unreachable packet access identification; and for the next received data packet unreachable packet access identifier, the next received storing the data packet to the serving access node.
10. The system as claimed in claim 8 or claim 9, wherein,
The access service node is further configured to: configure an aging time if the aging time is, the access identifier data packets processed according to the configured policy.
11, an access service node, a frame identifier separation network, the access service node arranged to:
Increase the allocation policy for finding out the identity and location mapping information packet; forwarding plane and interacts with the map, when the access service node receives a data packet sent by a user terminal, according to the data packet access Find the identity identification and location mapping information, if not to find the identity and location mapping information, according to the configuration policy processing data packets.
12, access service node as claimed in claim 11, wherein the configuration store and forward strategy, and forwarding the first packet header discarding one or more packets of.
13, access service node as claimed in claim 12, wherein the requirement,
The access service node is configured to: when the first packet is arranged to discard policy, the user terminal receives the transmitted data packet, if finding out the identity and location information of the map data message, discard the data packets; and
The access service node is further configured to: identify the data record access message; and for the next time the data packet is received identifier of the access, the next received data packets are discarded; or ,
The access service node is configured to: when the configuration packet forwarding policy headed, to send the data packet to the mapping forwarding plane; if the mapping forwarding plane location mapping to find the identity of the data packets not information is transmitted to the access service node unreachable packets, the unreachable message comprising the unreachable packet access identification; and
The access service node is further configured to: record the unreachable packet access identification; and for the packet data access identification of the next received unreachable packet discards;
Alternatively, the access service node is configured to: when the configuration policy to store and forward, store the data packet to the serving access node; forwarding plane sends a query message to the mapping, the query the access message includes the identification of the data packet to query the identity and location mapping information; if the mapping forwarding plane not find the identity and location information of the map data message is transmitted to the access service node unreachable packets, the said unreachable unreachable packets comprising packet access identification; and
The access service node is further configured to: record the unreachable packet access identification; and for the next received data packet unreachable packet access identifier, the next received storing the data packet to the serving access node.
14, an access service node as claimed in claim any of claims 11-13, the access service node is further configured to: configure an aging time if the aging time is, the data packet identifier according to the access configuration strategies for processing.
PCT/CN2010/074169 2009-09-17 2010-06-21 Method and system for interaction between asn and mapping-forwarding plane, and asn WO2011032405A1 (en)

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CN102307191B (en) * 2011-08-19 2015-05-06 北京交通大学 Method for raising separation map network security

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