Abstract
In recent years, train passengers have been transferring increasing amounts of data using mobile devices. Wireless networks with mobile relay nodes support broadband wireless communications for passengers of such vehicles using backhaul links. However, the mobility management entity reuses the handover of existing user equipment, resulting in the handover of the Long-Term Evolution network being unsuitable for user equipment within the cabins of vehicles traveling at high speed. In this paper, we propose a self-optimizing handover hysteresis scheme with dual mobile relay nodes for wireless networks in high-speed mobile environments. The proposed mechanism tunes the hysteresis and cell individual offset handover parameters based on the velocity of the vehicle and the handover performance indicator, which affects the handover triggering decision and performance. The results of simulations conducted in which the performance of the proposed scheme was compared to that of an existing scheme show that the proposed scheme can reduce the number of radio link failures and service interruptions during handover procedures.
Highlights
In recent years, train passengers have been transferring increasing amounts of data via their mobile devices
An Long-Term Evolution (LTE) network comprises many interconnected Evolved Node Bs, which are components of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). eNBs are connected to the mobility management entity (MME), serving gateway (S-GW) and packet data network gateway (P-GW) in the Evolved Packet Core (EPC) network to support various kinds of services, such as signaling, handover (HO) and security [2]
The proposed self-optimization scheme automatically tunes parameters based on performance and velocity; the HO hysteresis (HH) and cell individual offset (CIO) can be set to more appropriate values that are in line with changes in data communication
Summary
Train passengers have been transferring increasing amounts of data via their mobile devices. A means of providing broadband mobile communication that satisfies the communication demands of passengers in high-speed trains is essential. To address this need, we propose a mobile relay node (MRN)-based network architecture for communications on high-speed trains. We propose a mobile relay node (MRN)-based network architecture for communications on high-speed trains Using this network architecture, Long-Term Evolution (LTE) can achieve high data rates to support multimedia applications, such as Voice over IP (VoIP), video gaming and video streaming, over wireless networks for access anytime and anywhere on mobile broadband networks. An LTE network comprises many interconnected Evolved Node Bs (eNBs), which are components of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). An LTE network comprises many interconnected Evolved Node Bs (eNBs), which are components of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). eNBs are connected to the mobility management entity (MME), serving gateway (S-GW) and packet data network gateway (P-GW) in the Evolved Packet Core (EPC) network to support various kinds of services, such as signaling, handover (HO) and security [2]
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