Mobile Node Home Address Selection Using Connection Conditions
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Solution Overview
Problem
Existing communication systems struggle to efficiently manage and utilize multiple home addresses in mobile nodes, leading to delays and inefficient route selection due to incomplete or incorrect recognition of connection conditions and home agent management.
Innovation Solution
A communication control method and system that enables a communication partner to recognize and select appropriate home addresses by notifying information on home network connections and home agent conditions, allowing simultaneous use of multiple interfaces and optimizing packet routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile node has multiple home addresses allocated from different home networks, then the communication routes can be multiplexed and fault resistance can be enhanced, but the communication partner cannot efficiently select the appropriate home address due to lack of connection condition information
Solution Approach 1:
The mobile node performs preliminary actions by notifying the communication partner in advance about its connection conditions with multiple home networks and the corresponding home addresses. This includes sending notification messages that contain information about which home networks the mobile node is currently connected to and which home addresses are valid for each connection. This preliminary notification enables the communication partner to efficiently select the appropriate home address without having to query or guess, thus resolving the contradiction between enhanced reliability through multiple addresses and ease of address selection.
2Productivity
If the mobile node notifies the communication partner of connection conditions and home address information, then the communication partner can select appropriate home addresses efficiently, but the device complexity increases due to additional notification mechanisms
Solution Approach 1:
The notification mechanism is designed with multi-functionality to reduce overall device complexity. The same notification infrastructure is used for multiple purposes: notifying connection conditions, notifying home address information, and enabling efficient home address selection. By making the notification mechanism universal rather than creating separate mechanisms for each function, the patent achieves improved communication efficiency without proportionally increasing device complexity. The notification message structure is designed to carry multiple types of information in a unified format.
3Productivity
If the mobile node uses multiple interfaces simultaneously for communication, then route multiplexing and load distribution can be achieved, but the management of multiple home addresses and connection conditions becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the management of multiple interfaces and home addresses into distinct, manageable components. Each interface and its corresponding home address are treated as separate manageable units with their own connection condition information. The mobile node maintains separate connection condition records for each home network and associates them with specific home addresses. This segmented approach allows route multiplexing and load distribution across multiple interfaces while keeping the management complexity manageable through structured organization of connection information.
Data Source
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AI summary
Disclosed is a technique which, when an MN (mobile node) has one or a plurality of HoAs (home addresses) and a packet is transmitted from a CN (correspondent node) through an HA (home agent) to the MN, reduces a delay stemming from registration processing on binding information or selection processing among the plurality of HoAs and a delay of communication due to a result of the selection. According to this technique, an MN 100 notifies, to the CN, home network connection information indicative of whether or not it is currently in connection with a home network which has allocated its own plurality of HoAs, an address of each HA and an TD of each HA in a state associated with the plurality of HoAs. On the basis of the information received from the MN, an CN 150 grasps the home network with which the MN is currently in connection and makes an inquiry about the condition of the HA and sets an appropriate HoA, judged on the basis of the grasping result or the inquiry result, as a destination address of a packet to be transmitted to the MN.