Nokia Telecommunications Oy

Aki Suhonen

Markku K Vimpari

Jussi Sarpola

Marko Silventoinen

Pekka Rusi

Petri Patronen

Timo Kononen

Heimo Pentik&auml;inen

Pekka Multanen

The invention relates to a method for the determination of neighbours of a sub-cell (,C) in a cellular radio network base station (,) applying dynamic channel allocation, and to a base station (,) implementing the method. The base station (,) comprises at least two sub-cells (,A,,B,,C). Each sub-cell (,A,,B,,C) comprises an antenna unit (,A,,B,,C) with a fixed connection to the base station (,). A transceiver (TRX,-TRX,-TRXN) is used for transmitting a signal through an antenna unit (,A,,B,,C). A measurement unit (,) measures through the antenna unit (,A,,B,,C) the reception power of the received signal. The invention is characterized in that a transceiver (TRX,) is used for transmitting a test signal (,) through the antenna unit of the sub-cell (,C) under examination. The test signal (,) is received though the antenna units (,A,,B) of the of the sub-cells (,A,,B). The measurement unit (,) measures through the antenna units (,A,,B) of the other sub-cells (,A,,B) the reception power of the received test signal (,). Lastly, on the basis of the reception powers of the test signal (,) measured in the control unit (,), the sub-cells (,B) that are neighbours of the sub-cell (,C) under examination arm determined.

Determination of neighbour cells in a base station

The invention relates to a procedure for ensuring emergency calls in a wireless local loop environment which is based on technology employed in a mobile telephone system and which comprises a telephone exchange (,), an access node (,) connected to the telephone exchange, a terminal device (,) and a base station (,) connected to the telephone exchange via the access node and serving to transmit call signals between the access node and the terminal device, in which the home network (,) of the terminal device is defined by the base station and the associated access node and in which base stations (,) of other networks are disposed in the environment of the local loop, so that the terminal device receives information signals from the surrounding base stations and, based on said information signals, determines the base station it is communicating with, and the emergency call is set up via any base station compatible with the terminal device. To ensure successful set-up of an emergency call when connection between the terminal device (,) and the telephone exchange (,) of its home network (,) is lost, a dial tone is generated by means of the terminal device, an emergency number dialed via the terminal device is identified and the emergency call function of the mobile telephone system is used for the set-up of the emergency call.

Procedure and system for ensuring emergency communication in a wireless local loop environment

The present invention relates to a method for establishing a telecommunication connection from a subscriber station (1, 9) of a radio system forming a wireless subscriber connection to a public switched telephone network (PSTN), in which method a call request is received from the subscriber station. For achieving a faster and simpler connection establishment than heretofore, a traffic channel is reserved from a data transfer channel (12) leading to the PSTN exchange (7) to be used by the subscriber station (1) that has sent a call request, a connection is established to the PSTN exchange (7), an acknowledgement message is sent to the subscriber station (1), and a speech path is connected between the PSTN exchange (7) and the user interface (2) of the subscriber station, whereby the sound signals fed by the PSTN exchange (7) are transmitted directly on the speech path to the user interface (2) of the subscriber station (1), and the diallings supplied from the user interface (2) of the subscriber station are transmitted to the PSTN exchange (7).

Method for establishing a telecommunication connection

Growing community of inventors

Oulu, Finland

Aki Suhonen