Abstract:
Methods, apparatus and computer program products are disclosed for enhancing mobility robustness optimization in self optimizing networks. Neighbor relation information indicating relations between a handover source cell and candidate handover target cell(s), each including a first counter indicating events of an unsuccessful handover of a user equipment from the handover source cell to one candidate handover target cell, and a second counter indicating events of connection re-establishment attempt of the user equipment to the candidate handover target cell after an unsuccessful handover to another cell. A first candidate handover target cell to which handover of the user equipment was unsuccessful and a second candidate handover target cell to which the user equipment has re-established a connection, out of the candidate handover target cells, are determined. The first counter and/or the second counter of the neighbor relation information concerning the determined first and second candidate handover target cells is updated.
Abstract:
There is provided a method comprising receiving first information from a spectrum management entity at an entity associated with a network, the first information comprising an indication that a first channel will not be available after a first time interval, receiving, during the first time interval, an indication of a second channel for use by the network and using the indication, during the first time interval, to cause initiation of a handover by at least one user device from the first channel to the second channel.
Abstract:
The present invention provides apparatuses, methods, computer programs, computer program products and computer-readable media regarding enhanced timer setting for mobility robustness optimization. The present invention includes detecting, at a user equipment, establishment of a connection to a cell, determining, at the user equipment, whether the connection is established by a connection re-establishment procedure, detecting, at the user equipment, a radio link failure of the connection to the cell, and transmitting, by the user equipment, a message to a base station serving another cell after a further re-establishment or setup of the connection, the message including an indication from which it is derivable whether the radio link failure occurred within a certain time after the establishment of the connection by the connection re-establishment procedure.
Abstract:
There are provided measures for detection and inhibition of multiple consecutive inter-RAT ping-pong handovers (also called handover bounces). Such measures exemplarily include detecting multiple consecutive ping-pong handovers of a communication endpoint between two radio access technologies, wherein a ping-pong handover includes a handover from one of said two radio access technologies to the other of said two radio access technologies and a handover from the other of said two radio access technologies to the one of said two radio access technologies, and causing immediate inhibition of certain handovers of said communication endpoint.
Abstract:
A method including receiving a message at a first cell including at least one of: state information for the first cell; and state information for any neighbouring cells of the first cell; and determining a neighbouring relationship between the first cell and any neighbouring cells.
Abstract:
The present invention provides apparatuses, methods, computer programs, computer program products and computer-readable media regarding signaling physical cell identifier problems. Certain aspects of the present invention include receiving, at a network node, information regarding a suspected identifier problem from a first base station, the information indicating the suspected identifier problem between the first base station and a second base station, and analyzing the suspected identifier problem based on the received information.
Abstract:
There is provided a method and an apparatus for determining an adjustment of a tilt angle (α1, α2) for a beam emitted from an antenna (130) of a base station (100) which is serving a vertically sectorized cell (150) of a cellular radio telecommunication network. The method comprises (a) configuring user equipments (162, 164) being located in the vertically sectorized cell (150) with dedicated measurements, (b) collecting the dedicated measurements for a specific time interval, (c) obtaining a spatial user equipment distribution among a first sector (152) of the cell (150) and a second sector (154) of the cell (150) based on the collected dedicated measurements, (d) ascertaining an optimized spatial overlap region between the first sector (152) and the second sector (154) based on the obtained spatial user equipment distribution, and (e) determining the adjustment of the tilt angle (α1, α2) based on the ascertained optimized spatial overlap region.