Handover in a mobile wireless communication network –A Review Phase

Abstract

Mobility is the features of mobile communication that makes it desirable by all and varied. The whole world is now attractive in wireless communication as it provides users' ability to communicate on-the-go. IT is accomplished by transferring users from a radio network to another. This process is called handover. Handover occurs by adjusting the duration of soft handovers, the size of the areas and either by cell crossing or by deterioration in the signal quality of the current channel — the brief overview of handover, Handover in WiMAX and LTE, types of handover, handover types solutions, usually used handover parameters, some methods employed in the literature and I contemporary the convergent fact for continuance in the area of mobile wireless communication Handover.

Multi-Access Edge Computing Handover Strategies, Management, and Challenges: A Review

“…In other words, finding a server that can become the new host of the UE as it moves across a network whilst maintaining QoS and QoE requirements and ensuring service continuity. The decision phase is next, and it is known as the initiation phase; the handover commences after deciding that there is a need to shift the UE to the selected destination MEC server [17], [18].…”

“…Protocol layer handover is the type of handover related to a specific layer involved in the handover process, cross layer-based, network layer-based, or data link layer-based handover. The most common handover classification is the type of technology supported by the network, which is mainly divided into HHO and SHO [17], [18]. The initiation of the handover process differs for each type, besides the network measurements and requirements to consider when making the handover decision, as discussed earlier.…”

“…Handover performance can be evaluated based on common metrics used to evaluate network performance, e.g., delay, RTT, Signal to Noise Ratio (SNR), network coverage and power consumption in some cases [8], [17]. The service interruption time is an additional metric used in handover schemes; it is the duration between the transmission suspension time to the transmission resumption time, determined by Received Signal Strength Indicator (RSSI) measurement and the completion of the handover procedure [18].…”

“…The handover process initiates when the Received Signal Strength (RSS) has degraded and an alternative is available, which is the case near the cell boundary. There are two handover types known in mobile cellular networks; a Soft Handover (SHO) and a Hard Handover (HHO) [17]. The handover types have advantages and disadvantages, where the handover initiation decision is based on measuring parameters related to the network and radio strength, e.g., the physical distance between the mobile device and the BS, the distance between BS, the RSS, and the Bit Error Rate (BER).…”

“…In contrast to SHO, HHO is initiated when the connection between the BS and the mobile device is interrupted forcing the mobile device to seek a new connection. HHO can result in higher packet loss and degraded Quality of Service (QoS) compared to SHO [15], [17], [18]. The two handover types are illustrated in Fig.…”