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 arrangement for processing mobile station history information in a wireless communication system

Abstract: Methods and apparatus for processing mobile station transaction information at a serving control node in a wireless communication system are disclosed. The serving control node may be a base station, such as an eNodeB in an LTE/SAE wireless communication system. The transaction information, which may include, for example, mobility-related transaction information and traffic-related transaction information for a given mobile station, may be passed between controlling control nodes as the corresponding mobile station is handed over, so that a controlling control node has access to information characterizing the past activities of the mobile station. This information may be used in some embodiments for selecting a target control node for handover or for allocating link resources.

Method and apparatus for resource reservation in a mobile radio communications system

Abstract: Resources are reserved or otherwise allocated in a mobile radio communications system in an efficient and timely fashion. In general, the amount of resources that will likely be necessary to support a connection with a mobile station is predicted before those resources are actually required. More specifically, an unknown value of a dynamic connection parameter, like a number of radio paths likely to be involved in supporting the connection, is predicted. In the handover context, these radio paths might correspond to paths with different base stations (as in hard and soft handover) or to paths with different base station sectors (as in softer handover). The underlying resources are allocated using the predicted connection parameter and may include, for example, data processing and memory hardware resources, software resources, radio resources, etc. The resource allocation may also be established using both a predicted dynamic connection parameter along with one or more static connections parameters that are known at the time the connection is set up.

5G Handover using Reinforcement Learning

Abstract: In typical wireless cellular systems, the handover mechanism involves reassigning an ongoing session handled by one cell into another. In order to support increased capacity requirement and to enable newer use cases, the next generation wireless systems will have a very dense deployment with advanced beam-forming capability. In such systems, providing a better mobility along with enhanced throughput performance requires an improved handover strategy. In this paper, we will detail a novel method for handover optimization in a 5G cellular network using reinforcement learning (RL). In contrast to the conventional method, we propose to control the handovers between base-stations (BSs) using a centralized RL agent. This agent handles the radio measurement reports from the UEs and choose appropriate handover actions in accordance with the RL framework to maximize a long-term utility. We show that the handover mechanism can be posed as a contextual multi-armed bandit problem and solve it using Q-learning method. We analyze the performance of the methods using different propagation and deployment environment and compare the results with the state-of-the-art algorithms. Results indicate a link-beam performance gain of about 0.3 to 0.7 dB for practical propagation environments.

Intersystem handover method and apparatus

Abstract: A method and apparatus for providing seamless transfer of a active call between cellular communication systems operating in different signal formats and different modes of handoff request initiation. An example being a mobile initiated CDMA/FDMA/TDMA system like IS-661 and a TDMA/FDMA network initiated system like PCS 1900. The system which initiates handoff requests internally is aware of all the IDs of all the BTSs of the other communication system with which it is to interact and the MSs monitors signals of both formats for maintaining a table of received signals from nearby cells, the cell IDs and signal quality, while maintaining an active call and the further ability to transmit a handover request on a command channel while in the active call mode.

Method and apparatus for secondary cell release during handover in wireless communication system

Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for Secondary Cell release during handover in a wireless communication system.SOLUTION: A method of Secondary Cell (SCell) release during handover comprises the steps of: configuring at least one SCell by a source eNB for User Equipment (UE); and including information by the source eNB in a HandoverPreparationInformation message for a target eNB to control SCell release in the User Equipment during handover.