ANALISIS UNJUK KERJA JARINGAN SELULER MAKRO FEMTO TRANSMISI DOWNLINK MODE CLOSED ACCESS MENGGUNAKAN PENDEKATAN POTENTIAL GAME

BAGUS MADE SABDA N, I Wayan Mustika, S.T., M.Eng., Ph.D. ; Selo, S.T., M.T., M.Sc., Ph.D.

2015 | Tesis | S2 Teknik Elektro

Penggunaan perangkat mobile seluler semakin meningkat, khususnya untuk area indoor. Pengguna indoor berpindah dari satu sudut ke sudut lain karena aktifitasnya. Pengguna setiap saat menggunakan perangkat untuk mendukung produktivitas mereka. Tetapi, sering sekali pengguna perangkat mengalami masalah sinyal yang tiba-tiba hilang pada saat di area indoor. Teknologi desentralisasi jaringan seluler makro femto, merupakan teknologi yang banyak diterapkan untuk mengatasi masalah ini. Pemasangan femto base station dalam ruangan, dapat mengatasi masalah jaringan area indoor. Perlu adanya perlakuan prioritas hanya user terdaftar yang boleh terkoneksi ke jaringan seluler femto menggunakan mode closed access. Tetapi masalah interferensi menjadi fokus selanjutnya. Penempatan femto base station secara acak, dan penggunaan spectrum sharing berupa resource block pada jaringan seluler makro femto meningkatkan interferensi co-tier dan cross-tier. Sebelumnya telah dilakukan penelitian terkait pada transmisi downlink yang hanya fokus pada masalah interferensi co-tier. Penelitian lainnya juga mempelajari permasalahan interferensi menggunakan potential game untuk mengatur resource block pada transmisi uplink. Sedangkan penelitian ini mengusulkan pertimbangan interferensi co-tier dan cross-tier untuk menekan interferensi yang terjadi pada transmisi downlink dengan mode closed access. Potential game digunakan untuk mengatasi masalah pengaturan resource di jaringan seluler makro femto. Strategi best response digunakan untuk alokasi resource block secara dinamis. Hasil yang diperoleh, potential game mampu meningkatkan performa model sistem jaringan seluler makro femto mekanisme closed access melalui alokasi resource block secara dinamis. Jaringan seluler makro femto yang mempertimbangkan interferensi cross-tier dan co-tier, menunjukkan performa lebih baik dibandingkan dengan interferensi co-tier saja.

The use of mobile cellular devices is growing up exponentially, especially for indoor users. They move frequently from one to another corner depend on their need. Users often use their mobile devices to access the Internet for their jobs. However, sometimes they have sudden signal lost in indoor area. Decentralization technology for mobile cellular networks is a technology that is being applied to overcome this problem. Applying macro-femtocell networks by installing femto base stations for indoor or apartment resolves network problem for indoor users. Afterwards, the priority of indoor users needs to be set up so that registered users can only access the femtocell. It can be done by using closed access mechanism. But other problem appears, interference from other femtocell or macrocell affects the network performance. Random installation of femto base stations and the use of spectrum sharing, for example resource block, can increase co-tier and cross-tier interferences. Previous research related to downlink transmission just focus on co-tier interference has been done. Other research also studied interference problem using potential game in uplink transmission to manage resource block. However, this research proposed consideration of co-tier and cross-tier interferences to mitigate interference appears. Potential game is used to address the issue of resource allocation in cellular networks. Best response strategy is used for resource block dynamic allocation. The results show that Potential game with closed access mode improves macro-femtocell networks performance through dynamic allocation of resource block. Macro-femtocell networks which consider co-tier and cross-tier interferences point out better performance than consider the co-tier interference only.

Kata Kunci : jaringan seluler makro femto,closed access,interferensi,co-tier,cross-tier,potential game,alokasi resource block,best response,nash equilibrium