IPv6 Address Configuration Without Duplicate Address Detection
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Solution Overview
Problem
The IEEE 802.16e wireless communication system faces delays due to Duplicate Address Detection (DAD) during IP address configuration and handover processes, which hinder efficient data transmission in IPv6-based 4G communication systems.
Innovation Solution
A method is introduced to configure and register IP addresses without the need for DAD by allocating a unique Connection ID (CID) specific to each Mobile Station (MS) using a known network prefix and MAC address, allowing for immediate data transmission and reception without verifying IP address uniqueness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Duplicate Address Detection (DAD) is performed during IP address configuration, then IP address uniqueness is ensured, but communication delay increases
Solution Approach 1:
The system performs preliminary IP address allocation by the base station before the mobile station performs DAD. The base station pre-assigns a unique IP address to the mobile station during connection establishment, allowing the mobile station to skip or reduce DAD operations while ensuring address uniqueness through centralized allocation.
Solution Approach 2:
The base station acts as an intermediary that manages IP address allocation and registration. Instead of relying solely on the mobile station to perform DAD and register addresses, the base station mediates the process by allocating addresses and handling registration with the home agent, reducing the time burden on the mobile station.
2Reliability
If DAD is performed during handover, then address conflict is prevented, but handover time increases
Solution Approach 1:
During handover, the target base station performs preliminary IP address allocation before the mobile station completes the handover process. The target base station pre-assigns a new IP address and initiates registration with the home agent in advance, allowing the mobile station to quickly switch networks without performing time-consuming DAD operations during the actual handover.
Solution Approach 2:
The IP address allocation and registration process continues seamlessly during handover. The base station maintains continuous address management by allocating new addresses and updating home agents during the transition, ensuring uninterrupted service while minimizing handover time through parallel processing of address management tasks.
3Reliability
If IP address configuration follows IETF specifications with DAD, then address uniqueness is guaranteed, but data transmission is delayed
Solution Approach 1:
The base station performs preliminary IP address allocation and uniqueness verification before data transmission begins. By pre-assigning unique IP addresses and completing registration procedures in advance, the system eliminates the need for mobile stations to perform time-consuming DAD operations before data transmission, thereby improving data transmission efficiency while maintaining address uniqueness.
Solution Approach 2:
The base station acts as an intermediary that handles IP address management and uniqueness verification, freeing the mobile station from performing DAD. This centralizes the address management function, ensuring uniqueness through base station control while allowing mobile stations to immediately engage in data transmission without delay.
Data Source
AI summary
A method of configuring and registering an Internet Protocol (IPv6) address in a wireless mobile communication system having a connection-oriented radio link is provided. In an IP configuration method without Duplicate Address Detection (DAD), a Mobile Station (MS) is allocated a unique Connection Identifier (CID) specific to the MS from a serving Base Station (BS), and the MS and BS configure the IPv6 address independently using a known network prefix, a Medium Access Control (MAC) address of the MS, and the allocated CID. The BS registers the configured IPv6 address to a HA on behalf of MS.