Ubiquisys Limited

Cisco Technology, Inc.

Other

Gbenga Kabir Salami

Sandro Grech

Pankaj Uplenchwar

Andrea Giustina

James Briers

Simon Burley

Olasunkanmi Adio Durowoju

Raymond Yuk Chor Kwan

Colin J Kellett

A method is provided in one example embodiment and includes gathering at a small cell base station information to populate a neighbor cell list of the small cell base station; gathering measurement reports from connected mode user equipment ('UE') at the small cell base station; and determining whether uplink interference has exceeded a predetermined threshold and generating an alarm to a central node when the uplink interference has exceeded the predetermined threshold. Upon receipt of notification, the central node triggers an action on an aggressor node, wherein the aggressor node is a node servicing at least one aggressor user equipment ('UE') that significantly contributes to the uplink interference as determined from the gathered information and reports.

Mitigation of uplink interference within heterogeneous wireless communications networks

In one example embodiment, a method for selecting a physical layer identifier for use in a basestation is disclosed. The basestation may be comprised within a mobile communications network, which may also comprise a plurality of other basestations. The method comprises receiving a pool of identifiers available for use by basestations within the network and assigning a temporary identifier for the basestation. The method further comprises receiving from connected UEs reports of identifiers from among the received pool that are in use by basestations detected by the connected UEs and assigning a final identifier selected from the received pool of identifiers, the final identifier being different from the temporary identifier.

Selection of a basestation physical layer identifier

One example method of operation of a basestation in a mobile communications network is disclosed. The basestation may operate on a carrier channel and may be a member of a group of such basestations within the network. The method comprises establishing the presence of an adjacent basestation outside the group, which basestation operates on a carrier channel at least partially overlapping the carrier channel of the basestation and determining a degree of association between the basestation and the adjacent basestation with reference to other group members. The method further comprises setting at least one of a maximum downlink power for transmissions from the basestation and a maximum uplink power for transmissions from user equipment devices attached to the basestation, based on the degree of association between the basestation and the adjacent basestation. Also disclosed is a basestation operating in accordance with such a method.

Power setting

A method for controlling uplink transmit power for a plurality of basestations in a mobile communications network is disclosed. The basestations may form a second layer within the network, and the network may comprise another plurality of basestations forming a first layer. The method comprises clustering the plurality of second layer basestations according to association with first layer basestations, exchanging second layer basestation loading information between second layer basestations belonging to the same cluster, and dynamically setting uplink transmit power limits for individual second layer basestations based on the exchanged loading information. The method may further comprise updating the clustering of the second layer basestations according to dynamic variation in association of second layer basestations with first layer basestations. The method may also comprise dynamically controlling uplink resource allocation such that concurrent use of the same frequency resource by more than one second layer basestation is reduced.

Controlling uplink transmit power in a plurality of basestations

In a basestation of a cellular communications network, steps are taken to identify at least one situation, in which a user equipment device is liable to experience a rapid deterioration in a quality of a link with the base station. Measurement information is collected, related to the radio conditions experienced by a user equipment device in said situation, and at least one handover parameter is automatically adjusted in the basestation based on the collected information.

Handover in a cellular communication network

In one example embodiment, a method for classifying a basestation in a cellular communications network is provided that may include obtaining an identifier used by the basestation, comparing the identifier to a pool of identifiers reserved for a class of basestations, obtaining a frequency on which the basestation is operating, comparing the frequency to a pool of frequencies used by the class of basestations, and identifying the basestation as belonging to the class of basestations if the identifier is in the pool of identifiers and the frequency is in the pool of frequencies. Another method for classifying a basestation may comprise receiving a broadcast from the basestation including an attribute of the basestation, comparing the attribute with an attribute value range corresponding to the class of basestations, and identifying the basestation as belonging to the class of basestations if the received cell attribute falls within the attribute value range.

Classification of a basestation

An example method is provided and includes monitoring a plurality of neighboring nodes to detect attempts to perform mobility load balancing by the neighboring nodes; detecting an attempt to perform mobility load balancing by at least one neighboring node; determining an identity of the at least one of the neighboring nodes; and setting an offset parameter for the identified neighboring node(s) to an optimal value. The monitoring may include monitoring a number of handover requests received within a predetermined time period. The detecting may include detecting that the number of handover requests received within the predetermined time period exceeds a predetermined number. The determining may include determining a source of each of the received handover requests, which may be accomplished by examining a user equipment history included in each of the received handover requests or by performing an iterative elimination process with respect to the neighboring nodes.

Growing community of inventors

Swindon, United Kingdom

Gbenga Kabir Salami