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Automated Configuration of User Equipment Speed Dependent Blacklists Disclosure Number: IPCOM000200494D
Publication Date: 2010-Oct-15
Document File: 2 page(s) / 427K

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Automated Configuration of User Equipment Speed Dependent Blacklists

Nokia Siemens networks
Matthias Hesse, Karol Drazynski, Jaroslaw Lachowski, Damian Kolmas

In the following, an idea is described which is related to heterogeneous networks, i.e. multi-layer networks consisting of base stations of different coverage area and/or transmit power, e.g. macro cells, pico cells, re- lay nodes and femto cells. This type of radio network is expected to be used in future LTE (Long Term Evo- lution) and LTE Advanced standards.

The hereby described idea is related to a known idea which relates to a User Equipment (UE) speed depen- dent selection of blacklists which are provided by the network. These blacklists shall be configured via the network by

• measurement configuration message for connected mode or

• SIB 4/5 for idle mode (SIB: System Information


The blacklists need to be applied by the UE depending on either number of reselections or successful han- dovers that took place. The benefit of this solution is that the UE can avoid blacklisted cells which are not applicable for a given UE speed. At the same time, minimal signaling is necessary.

However, these blacklists depend on local conditions such as the distribution of base stations and on tempo- ral parameters such as traffic. Hence, blacklists have to be continuously adapted. Due to the size of modern communication networks, methods for an automated configuration of speed dependent blacklists are need- ed. Unfortunately, it has not yet been specified how blacklists can be dynamically created or configured for different base stations, deployment scenarios and net- work configurations so that they can be applied in the mentioned known idea.

As previously stated, a manual configuration of speed dependent blacklists for each base station in heteroge- neous networks is simply not possible due to the high

number of cells and even higher number of possible combinations. This problem has not yet been solved.

To solve the problem mentioned above an idea is pro- posed providing the dynamic and automated blacklist creation and the configuration within a base station. The hereby proposed idea is a speed-dependent dy- namical creation of blacklists and adoption to the lo- cal conditions. I.e. optimal blacklists can be generated depending on the position, the type of the cell, local propagation conditions and the transmit power. More- over, those blacklists can be matched to the temporal variations of the network such as the load of a base st...