Manajemen Interferensi Femtocell Menggunakan Metode Fractional Frequency Reuse (FFR) pada Jaringan Ultra-Dense Network (UDN) dengan Sektorisasi Macrocell

Sitronella Nurfitriani Hasim (Institut Teknologi Sumatera)
Novalia Pertiwi (Institut Teknologi Sumatera)
Adinda Azzahra (Institut Teknologi Sumatera)
Anggrit Dewangkara Yudha Pinangkis (Institut Teknologi Sumatera)
Soraida Sabella (Institut Teknologi Sumatera)
Muhammad Rizky Hikmatullah (Institut Teknologi Sumatera)
Aji Pamungkas Tri Nurcahyo (Institut Teknologi Sumatra)

Electrician : Jurnal Rekayasa dan Teknologi Elektro
Vol. 20 No. 1 (2026)

The development of 5G technology with the implementation of Ultra Dense Network (UDN) has brought new demands in interference management and frequency spectrum allocation. The main challenge faced is the high level of inter-cell interference, especially between macrocells and femtocells in highly dense network environments. This study applies the Fractional Frequency Reuse (FFR) method for interference management in downlink femtocell networks, allocating 4 sub-frequencies to 3 sectors in the cell edge area and 1 sector in the cell center. The probability of SINR below 15 dB successfully decreased from 100% to 0%, throughput below 100 Mbps dropped from 100% to 0%, while BER above 0.01 decreased from 100% to 0%, with a minimum value reaching 10⁻¹³. The optimal performance of this sector is supported by the implementation of a method that eliminates cross-tier interference. SINR values are directly proportional to throughput and inversely proportional to BER.