Intra-cell handover refers to a type of handover that occurs within the same cell in mobile communication systems. Instead of transitioning between different cells (as is common in most handovers), intra-cell handover deals with changing the channel or frequency within the same cell. It’s essentially a type of handover where the beginning and end of the handover process take place within the boundaries of a single cell.

Reasons for Intra-cell Handover:

  1. Interference: If the current channel or frequency is experiencing too much interference or noise, it might be more efficient to switch to a clearer channel within the same cell.
  2. Frequency Re-use: To manage available spectrum more effectively, a base station might decide to shift a user to a different frequency within the same cell.
  3. Load Balancing: In systems with multiple carriers or frequencies per cell, if one frequency is overloaded while others are underutilized, a handover within the same cell can help balance the load.
  4. Hardware Failures: If a particular hardware component serving a specific frequency faces issues, users might be moved to another frequency within the same cell.
  5. Maintenance: If maintenance or updates are required for a particular set of equipment within the cell, ongoing sessions might be shifted to another frequency to avoid disruptions.

Advantages of Intra-cell Handover:

  1. Minimal Disruption: Since the handover occurs within the same cell, there’s usually minimal disruption or noticeable change for the user.
  2. Quick: The process tends to be faster than inter-cell handovers, as there’s no need for coordination between different cells or base stations.
  3. Efficient Resource Use: It allows for better utilization of available frequencies and channels within a cell, ensuring more users get optimal connections.

However, like all handovers, it’s essential that intra-cell handovers are executed seamlessly to maintain call or data session quality and prevent disruptions.