Handover

About: Handover is a research topic. Over the lifetime, 24219 publications have been published within this topic receiving 296416 citations. The topic is also known as: handoff.

Method and system for inter-operator handover between WCDMA and GSM

Abstract: A method and system for inter-operator handover in a telecommunications network comprising a greenfield WCDMA operator and a GSM/WCDMA operator. When a mobile terminal of the greenfield operator is moving from the coverage area of the home network to the GSM/WCDMA area, a neighbor list of GSM cells is provided to the mobile terminal (116) for handover to a GSM cell when the home network coverage is not available. When the mobile terminal is returning home from the GSM/WCDMA area, a neighbor list of the home cells is provided to the mobile terminal (120) so that the greenfield mobile station is connected to its home network whenever there is coverage. Preferably, the neighbor lists are provided to the mobile terminal only in the connected mode.

A cost-based adaptive handover hysteresis scheme to minimize the handover failure rate in 3GPP LTE system

Abstract: We deal with a cost-based adaptive handover hysteresis scheme for the horizontal handover decision strategies, as one of the self-optimization techniques that can minimize the handover failure rate (HFR) in the 3rd generation partnership project (3GPP) longterm evolution (LTE) system based on the network-controlled hard handover. Especially, for real-time operation, we propose an adaptive hysteresis scheme with a simplified cost function considering some dominant factors closely related to HFR performance such as the load difference between the target and serving cells, the velocity of user equipment (UE), and the service type. With the proposed scheme, a proper hysteresis value based on the dominant factors is easily obtained, so that the handover parameter optimization for minimizing the HFR can be effectively achieved. Simulation results show that the proposed scheme can support better HFR performance than the conventional schemes.

Secure and Efficient Protocol for Route Optimization in PMIPv6-Based Smart Home IoT Networks

Abstract: The communication in the Smart Home Internet of Things (SH-IoT) comprising various electronic devices and sensors is very sensitive and crucial In addition, the key requirements of the SH-IoT include channel security, handover support, mobility management, and consistent data rates Proxy mobile IPv6 (PMIPv6) is considered as one of the core solutions to handle extreme mobility; however, the default PMIPv6 cannot ensure performance enhancement in SH-IoT scenarios, ie, Route Optimization (RO) The existing security protocols for PMIPv6 cannot support secure RO for smart home IoT services, where mobile nodes (MNs) communicate with home IoT devices not belonging to their domain Motivated by this, a secure protocol is proposed, which uses trust between PMIPv6 domain and smart home to ensure security as well as performance over the path between MNs and home IoT devices The proposed protocol includes steps for secure RO and handover management, where mutual authentication, key exchange, perfect forward secrecy, and privacy are supported The correctness of the proposed protocol is formally analyzed using BAN-logic and Automated Validation of Internet Security Protocols and Applications (AVISPA) Furthermore, network simulations are conducted to evaluate the performance efficiency of the proposed protocol The results show that the proposed approach is capable of providing secure transmission by resolving the RO problem in PMIPv6 along with the reduction in handover latency, end to end delay and packet loss, and enhancement in throughput and transmission rate even during the handover phase

The role of satellites in personal communication services

Abstract: This paper aims at providing a complete analysis of the issues relevant to satellite systems in the perspective of the third generation of mobile systems. The analysis considers, on the one hand, the possible satellite system evolutionary paths and, on the other hand, the satellite system requirements related to technological issues. As regards the satellite evolutionary paths, the paper provides a view of the satellite systems already in operation or currently being developed and outlines the guidelines followed by future satellite systems (in that respect, particular emphasis is given to small satellites). The analysis is performed by also taking into account the potential market and the regulatory issues. As regards the satellite system requirements related to technological issues, some key features such as integration with the terrestrial cellular networks, satellite system capacity, handover, synchronization, are discussed in the light of the technological innovations which are being proposed for the third generation of mobile systems. The above-mentioned issues are dealt with by referring both to time division multiple access (TDMA) and to code division multiple access (CDMA), i.e., the third-generation candidate access techniques. >

Method and apparatus for performing handover of user equipment (ue) during discontinuous reception (drx) operation in mobile communication system

Abstract: A method and apparatus for increasing the success rate of a handover of a connected mode UE while minimizing the power consumption of the UE during DRX operation in a mobile communication system is provided. The method includes the steps of transmitting a cell change report to the serving base station, and then suspending the DRX operation to transition to an active mode; receiving a handover command message, and completing the handover to a target cell; checking if the handover command message includes a DRX resume command; waiting until a control message including the DRX resume command is received from the target base station; and after the control message including the DRX resume command is received, transitioning from the active mode to a sleep mode, and resuming the DRX operation.