The present invention relates to a mobile communication method in which a mobile station performs a handover from a handover source radio base station to a handover target radio base station. The mobile communication method includes the steps of: (A) acquiring, at the handover target radio base station, from the handover source radio base station or a switching center, a key for calculating a first key for generating a certain key used in a communication between the handover target radio base station and the mobile station; and (B) acquiring, at the handover target radio base station, from the switching center, a second key for calculating a first key for generating a certain key used in a communication between a next handover target radio base station and the mobile station.

Mobile communication method and mobile station

A communication apparatus and method are provided for predicting effects of changes in at least one radio network parameter on a cellular network which comprises a processor which is adapted to: (a) select a source cell in a cellular network; (b) select from among a first plurality of cells being neighbors of that source cell, a second plurality of neighboring cells and define a reference cluster that includes the source cell and the second plurality of cells; and (c) use the reference cluster to predict the effects of carrying out one or more changes in at least one radio network parameter on at least one network performance indicator of the reference cluster, and based on that prediction, establishing an expected impact of the one or more changes in the at least one radio network parameter on a cellular network performance.

System and method for optimizing performance of a communication network

According to an aspect of the present disclosure, there may be provided a method in a wireless cellular telecommunications device camped on a serving cell, the device storing a parameter obtained by decoding system information of a first cell The method comprises: measuring an attribute of a signal received from a candidate cell; and, evaluating the candidate cell for re-selection based on the measured attribute according to a priority-based re-selection algorithm irrespective of the stored parameter The parameter indicates a minimum required received signal code power A device and computer readable medium are also provided

Cell re-selection in a cellular telecommunications network

A parameter for transmission by an access point is determined in a manner that facilitates access terminal mobility. For example, a cell reselection parameter and/or a handover parameter may be determined based on the quality of a signal from one access point (e.g., a macro cell) at another access point (e.g., a femto cell). In addition, a cell reselection parameter and/or a handover parameter may be determined based on the proximity of one access point (e.g., a femto cell) to another access point (e.g., a macro cell). Through the use of these techniques, a parameter may be determined in a manner that mitigates access terminal ping-ponging between access points and that mitigates outages that may otherwise occur as a result of an access terminal remaining on an access point too long.

Determining cell reselection parameter for transmission by access point

One example method is provided for dynamic allocation of air interface resources in a cellular network. The method can include at least three wireless cells located within a geographical proximity of each other. The method can include determining, by a central managing entity, one or more classification rules for classifying each of said plurality of mobile devices according to the one or more classification rules. The method can also include providing, by the central management entity, to a group of base stations associated with the at least three cells, information that can include, at least in part, information that relates to the determined one or more classification rules and information that relates to semi-static allocation of blocks of air interface resources for use by one or more specific members of the group of base stations.

Method and system for dynamic allocation of resources in a cellular network

A wireless communication system and handover method for the wireless communication system are provided. A handover method for a wireless communication system including a plurality of femto cells and at least one macro cell within which the femto cells are disposed includes determining, at a Radio Network Controller (RNC), a handover of a terminal to a femto base station based on a measurement report of the terminal and preset handover parameters, sending a radio link setup request message to a femto base station gateway, the radio link setup request message including a uplink scrambling code and an International Mobile Subscriber Identity (IMSI) of the terminal and a Logical Cell Identifier (LCID) of femto base stations reusing frequency of a macro base station, searching, at the femto base station gateway, for femto base stations of which LCIDs match the LCID contained in the radio link setup request message, and performing, when only one LCID-matched femto base station is discovered, the handover of the terminal to the LCID-matched femto base station.

Wireless communication system and handover method therein

PURPOSE: A wireless telecommunications system for a handover and a method thereof are provided to accurately select a target base station by reusing a frequency which a macro cell uses and dividing a femtocell. CONSTITUTION: A femto base stations(107) are included in the region of macro base stations(102). The femto base stations comprise an ID for discriminating from other femto base stations by reusing the frequency of the macro base stations. A femto base station gateway(105) manages the femto base stations by mapping the IDs of the femto base station with the ID of the macro base station. The femto base station gateway searches a candidate femto base station through the IDs when there is a request of a handover toward the femto base station.

Jong Hyune Kim

Papers

Wireless communication system and handover method therein

A communication system for handover to a femto base station and a method thereof