Geometric Programming Based Resource Allocation for Mobile Relays on Vehicles
| Autor: | Tianhang Fu, Kyung Sup Kwak, Shaoyi Xu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Mathematical optimization
Computer science business.industry Orthogonal frequency-division multiple access Macro cell Real-time computing Subcarrier Constraint (information theory) Telecommunications link Computer Science::Networking and Internet Architecture Resource allocation Wireless Resource management Mobile telephony Geometric programming business |
| Zdroj: | VTC Spring |
| DOI: | 10.1109/vtcspring.2014.7022930 |
| Popis: | Mobile relay stations (MRSs) which are mounted in a high-speed train (HST) is popular system architecture for high-speed mobile communications. However, sharing spectrums between the macro cell and the MRS cell, interference exists in this hybrid system. In this paper, we investigate the downlink of a multi-cellular decode and forward (DF) relayed orthogonal frequency division multiple access (OFDMA) system and formulate the problem to maximize the system sum rate of all cells subject to a total power constraint and a new proposed time delay constraint. An effective resource allocation scheme combined by greedy sub-carriers allocation and geometric programming (GP) based power allocation algorithm is proposed to optimize subcarrier allocation and power allocation. Particularly, a rigid time delay constraint is introduced to accommodate the high speed mobile environment except for the common power constraint. Numerical experiments verify that the proposed resource allocation scheme outperforms the other traditional approaches and the necessity of introducing the time delay constraint. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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