Rushabh's Digital Garden

Micro mobility

2 min read

Micro-mobility manages the seamless movement of mobile devices within a local or regional network, ensuring low-latency handovers within a single administrative domain. It is crucial for real-time applications like VoIP, online gaming, and video streaming.

Need for Micro-Mobility

  1. Reduces Handover Latency

    • Ensures faster handover between access points.

  2. Scalable Signalling

    • Limits signalling to the local network, reducing global routing updates.

  3. Efficient Resource Usage

    • Avoids overload on global mobility protocols like Mobile IP.

Three major protocols are Cellular IP, HAWAII, and HMIPv6.

Cellular IP

Cellular IP is a micro-mobility protocol designed for the seamless movement of mobile nodes within an IP-based network. Unlike global mobility protocols, it optimizes local handovers using a routing cache, ensuring uninterrupted connectivity with minimal overhead.

Advantages of Cellular IP:

  1. Seamless Local Handover: Maintains uninterrupted connectivity by using a routing cache during node movement.
  2. Low Overhead: Optimizes local handovers without relying on global mobility protocols.

HAWAII (Handoff-Aware Wireless Access Internet Infrastructure)

HAWAII implements a hierarchical mobility management approach to enhance efficiency. By localizing handover processes, it minimizes global signalling overhead, making it ideal for scalable and efficient micro-mobility management.

Advantages of HAWAII:

  1. Reduced Global Signalling: Localizes handover processes to minimize signalling overhead.
  2. Scalability: Well-suited for large networks due to its hierarchical structure.

Hierarchical Mobile IPv6 (HMIPv6)

HMIPv6 is an advanced extension of Mobile IPv6 that introduces a dual-level mobility management system. By segmenting handovers into local and global domains, HMIPv6 significantly reduces signalling traffic, improves handover speed, and enhances network performance for mobile users.

Advantages of HMIPv6:

  1. Improved Handover Speed: Segregates local and global domains for faster handovers.
  2. Lower Signalling Traffic: Reduces global network load by handling updates locally.

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