Candidate Cell Priority (HO Priority) - CDR Alcatel-Lucent

Improvement in Quality and reduction in Call Drops can be achieved in Alcatel-Lucent (B11, B10) by proper adjustment of Candidate Cell Priority (HO Priority Level).

Parameter:

• Candidate_Cell_Priority

Target Cells: Radio Drops, HO Drops, Bad UL/DL Quality

Theory: 

• This parameter decides the priority of target cells for each source cell during Handover
• One standard approach is use highest priority for DCS neighbors (0), 2nd highest (1) for less interfered and 3rd highest (2) for others

Concentric Cell (Co-BCCH) Technology

Concentric cell (also known as Common BCCH) are those that operate with both GSM and DCS TCH frequencies but with a single BCCH (of GSM), thereby having below advantages compared with dual-BCCH:

• DCS BCCH resource is saved per cell
• Reduced BA List
• Reduced DCS BCCH interference
• Reduced number of neighbours
• Potential for Reduction in number of Handovers

An important physical parameter consideration for Concentric Cells is the tilt difference between the DCS and GSM antennas. Generally, in an interfered GSM network, the DCS antenna has lower downtilt than the GSM antenna to equalize the coverage area.