Mapping Forwarding Plane for AID-RID Separation in Mobile Networks
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Solution Overview
Problem
Existing communication technologies face challenges in efficiently forwarding data messages during host mobility, as they do not explicitly define how to handle data transmission during location inquiries and fail to support roaming scenarios, leading to increased routing loads and service unreachability.
Innovation Solution
The proposed solution involves expanding the packet forwarding functional entity in the Identity Location Register (ILR) to support data message forwarding in a network-based identification and location separation architecture, where Access Service Nodes (ASNs) maintain AID-RID mapping information and route data messages using a mapping forwarding plane, ensuring seamless communication even in roaming scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the source ASN performs a CN location inquiring process to obtain mapping information before forwarding data messages, then the routing accuracy is improved, but the communication delay increases due to the inquiring process lasting several hundred milliseconds to a few seconds
Solution Approach 1:
The source ASN performs the CN location inquiring process in advance before actual data communication begins. When the MN initiates communication, the source ASN proactively queries the ILR to obtain the CN's mapping information (AID-RID mapping) beforehand, so that when data messages need to be forwarded, the routing information is already available, eliminating the delay that would otherwise occur during active communication.
Solution Approach 2:
The patent prepares routing information in advance to cushion against potential communication delays. By obtaining the CN's location mapping information before it is needed for data forwarding, the system creates a buffer that prevents communication interruptions or delays during actual data transmission, even though the CN may not yet be actively communicating.
2Adaptability or versatility
If routers perform longest match routing table search to forward data messages, then the routing flexibility is improved, but the processing complexity increases and many service-unrealizable messages consume network resources
Solution Approach 1:
The patent segments the network into access networks and backbone networks, with ASNs at the access layer handling local routing decisions and the backbone network handling core routing. This segmentation allows simplified routing at the access layer while maintaining overall routing flexibility through the backbone network's mapping forwarding plane, reducing the processing burden on individual routers.
Solution Approach 2:
The patent introduces a mapping forwarding plane as an intermediary between the access network and backbone network. This mapping forwarding plane maintains AID-RID mapping information and assists ASNs in forwarding data messages, particularly for messages destined for correspondent nodes. This intermediary reduces the processing complexity at ASNs while maintaining routing flexibility through the mapping information.
3Device complexity
If the IP address serves dual functions as both location identifier and identification identifier, then the protocol simplicity is improved, but the routing load increases and host mobility support becomes difficult
Solution Approach 1:
The patent segments the dual functions of the IP address into separate identifiers: the AID (Access Identifier) serves as the identification identifier for the host, while the RID (Routing-Location Identifier) serves as the location identifier. This segmentation allows the routing system to use only the RID for location-based routing decisions, reducing the routing load, while the AID maintains host identity information for application-layer communication.
Solution Approach 2:
The patent extracts the location identification function from the traditional IP address by introducing the RID as a separate location identifier. The original IP address (AID) retains only the host identification function. This extraction allows routing operations to work with only the RID, reducing routing table complexity and routing load, while preserving host identity information in the AID.
Data Source
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AI summary
A method and system are provided for initiating forwarding of communicaiton, information and data message. The method for initiating communication by a terminal includes: the terminal sends a data message to the Access Service Node ( ASN ) to which the terminal belongs, the data message includes an Access Identifier(AID) of a communicaiton opposite end; after the ASN to which the terminal belongs receives the data message, if the Routing-Location Identifier(RID) corresponding to the AID of the communication opposite end is unable to be searched out locally, the data message will be sent to a mapping forwarding plane; when the mapping forwarding plane receives the data message, it queries the RID corresponding to the AID of the communication opposite end and encapsulates it in the data message, and then the data message is forwarded to the ASN to which the communication opposite end belongs through a generalized forwarding plane; when the ASN which the communication opposite end belongs to receives the data message, it divests the data message of the RID and sends the RID to the communication opposite end. A routing configuration method is provided in the network in which the AID and RID are separated, a mapping plane is divided into multi-domains, and routing information is established, saved and maintained for each intra-domain node and inter-domain node.