Nokia Telecommunications Oy

Nokia Networks Oy

Nokia Corporation

Jari Ryyn&auml;nen

Harri Posti

Marko Silventoinen

Harri A Jokinen

Petri Patronen

Jukka Suonvieri

A method of improving connection quality and system capacity in a cellular radio system is disclosed. Each cell in the cellular radio system has at least one base station (BS) communicating with subscriber terminals (MS) in its area. The method is characterized in that the subscriber terminal transmits in two time slots and receives in two time slots during one frame, and that the subscriber terminal employs the time slots of the frame following the frame used for transmission and reception for measuring neighboring base stations. Owing to the method and cellular radio system, methods developed for improving connection quality and system capacity in a cellular radio system, such as frequency hopping, discontinuous transmission and power control, can be used on the traffic channels of the base station BCCH carrier wave frequency.

Method of improving connection quality and system capacity, and a cellular radio system

The invention relates to a method of facilitating measurement of a transmission level, and a base station. The base station moves its broadcast (BCCH) from one time slot ( to ) to another so that the broadcast (BCCH) is sent in different time slots ( to ) of successive frames. In the long run, the broadcast (BCCH) is preferably sent in all the time slots ( to ).

Method of facilitating transmission level measurement, and base station

The invention relates to a method for estimating the interference level in a cellular radio system comprising in each cell a base station ( ) in each cell, and a number of subscriber terminals ( to ) communicating with the base station. The terminals measure power levels from those frequencies which are on the list that is maintained by the terminal and comprised those base stations and frequencies to which the terminal can perform a handover. In the solution of the invention the list also comprises frequencies whose power level information is used for the frequency planning of the system. Frequency planning can thus be implemented without any separate means.

Method of estimating interference level in a radio system

The invention relates to a method of implementing a handover in a cellular radio system. The cellular radio system has at least on cell (Cd) which comprises at least two subcells and in which all available frequencies are dynamically used. The cellular radio system comprises in each cell (C, Cd) at least one base station (BTS) which communicates with subscriber terminals (MS) located within its area. A handover from an old cell to a new cell (Cd) applying dynamic channel allocation is characterized in that only BCCH carrier frequency time slots comprising control channels are transmitted all the time in all subcells of the cell(Cd). The method allows traffic channels of a BCCH carrier frequency to be dynamically reused in subcells of the cell (Cd), providing the improved system capacity.

Method of implementing a handover in a cellular radio system

Provided is a method and system for performing a handover of a terminal subscriber between sub-cells in a cellular radio network base station. In the method and system, signals from antenna units corresponding to each of the sub-cells are added together to form a combined signal. A signal power of the combined signal and the signal power a signal from a serving sub-cell are measured in a transceiver of the base station. The measurement results are compared. If the signal power of the combined signal is greater than the signal power of the signal from the serving sub-cell, a handover of the terminal subscriber is performed.

Growing community of inventors

Helsinki, Finland

Jari Ryynänen

Growing community of inventors

Helsinki, Finland

Jari Ryyn&auml;nen

Jari Ryynänen