Browsing by Author "ABUBAKAR ALI"

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    FIBER TO THE ROOM BASED ON NS3 SIMULATION
    (HUSTer, 2023) ABUBAKAR ALI
    With the rapid development of communication technology, users' demand for network service quality has become increasingly stringent, especially in terms of bandwidth capacity, transmission delay and other aspects of the expectation of significant improvement. Fiber optics, with its unparalleled high speed, very low latency, and large bandwidth, has attracted the attention of the industry and academia, and has become the cornerstone to support the dynamic development of Internet services. In fiber-to-the-room (FTTR) wireless local area network (WLAN) architecture, users access the Internet through WiFi interfaces. However, limited by the coverage area of access points (APs), when station (STA) moves to an area with weak AP signal coverage in the WLAN network, the network connection between the user device (STA) and the AP is prone to interruption, which seriously affects the user experience. In order to solve this problem, FTTR access network core chip and system research, a key research and development program in Hubei Province, China, has been considered for work related to the deployment of FTTR all-optical network services. In order to improve the user experience, seamless roaming in FTTR WLAN is investigated. The core mechanism of this roaming framework lies in the centralized decision control mechanism. During the simulation operation, the system continuously monitors in real time the received signal strength indication (RSSI) between the STA and each AP, the number of users currently carried by each AP, the queue traffic distribution and other information, and reports this information to the optical line terminal (OLT) in real time. When it detects that the signal strength between an STA and its current associated AP is lower than the threshold value due to a change in location, the OLT immediately initiates the roaming control process and selects the optimal roaming target AP based on the collected network information to ensure that the roaming process minimizes the impact on user services. Simulation results show that the scheme exhibits excellent performance and efficiency, effectively solves the network connection interruption problem caused by user movement, and significantly improves the user experience.