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.

Mobility Management Schemes at Radio Network Layer for LTE Femtocells

Abstract: Femtocell, a small cellular base station in home and small business environment, is an attractive solution for operators to improve indoor coverage and network capacity in 3G networks. However, there are technical problems due to its mass deployment. The paper presents a femtocell architecture for LTE and investigates different handover scenarios. Two mobility management schemes at radio network layer (RNL) are proposed and their signaling cost, complexity, standard impact and application scenarios are also discussed.

Efficient Live Migration of Edge Services Leveraging Container Layered Storage

Abstract: Mobile users across edge networks require seamless migration of offloading services. Edge computing platforms must smoothly support these service transfers and keep pace with user movements around the network. However, live migration of offloading services in the wide area network poses significant service handoff challenges in the edge computing environment. In this paper, we propose an edge computing platform architecture which supports seamless migration of offloading services while also keeping the moving mobile user “in service” with its nearest edge server. We identify a critical problem in the state-of-the-art tool for Docker container migration. Based on our systematic study of the Docker container storage system, we propose to leverage the layered nature of the storage system to reduce file system synchronization overhead, without dependence on the distributed file system. In contrast to the state-of-the-art service handoff method in the edge environment, our system yields a 80 percent (56 percent) reduction in handoff time under 5 Mbps (20 Mbps) network bandwidth conditions.

Adaptive quality of service handoff priority scheme for mobile multimedia networks

Abstract: For various advantages including better utilization of radio spectrum (through frequency reuse), lower mobile transmit power requirements, and smaller and cheaper base station equipment, future wireless mobile multimedia networks are likely to adopt micro/picocellular architectures. A consequence of using small cell sizes is the increased rate of call handoffs as mobiles move between cells during the holding times of calls. In a network supporting multimedia services, the increased rate of call handoffs not only increases the signaling load on the network, but makes it very difficult for the network to guarantee the quality of service (QoS) promised to a call at setup or admission time. This paper describes an adaptive QoS handoff priority scheme which reduces the probability of call handoff failures in a mobile multimedia network with a micro/picocellular architecture. The scheme exploits the ability of most multimedia traffic types to adapt and trade off QoS with changes in the amount of bandwidth used. In this way, calls can trade QoS received for fewer handoff failures. The call level and packet level performance of the handoff scheme are studied analytically for a homogeneous network supporting a mix of wide-band and narrow-band calls. Comparisons are made to the performance of the nonpriority handoff scheme and the well-known guard-channel handoff scheme.

Method and apparatus to control handoff between different wireless systems

Abstract: A wireless communications network (10) includes a first base station system (40) that performs wireless communications according to a first protocol (e.g., 1xEV-DO protocol) and a second base station system (14) that performs wireless communications according to a second, different protocol (e.g., IS-2000). A link is provided between the first and second base station systems (40, 14) to enable a network-initiated handoff procedure. If a source base station systems detects that a handoff of a mobile station to a target base station system is required, the source base station system exchanges messaging over the link with the target base station system to perform the handoff. In one example, the handoff is a hard handoff.

Mobile device with configurable communication technology modes and geofences

Abstract: Many machine-to-machine (M2M) devices and portable user devices have the ability to switch between cellular technology and satellite technology to ensure network connectivity. While the automatic handover is useful, there are situations where it is desirable to have greater control over the configuration of the communication modes of these devices. Accordingly, embodiments of the present invention describe the ability to designate a prioritized list of communication modes, the ability to manually configure communication modes directly on the device, the ability to configure communication modes remotely over the air, and the ability to configure communication modes according to a geofence.