Method for handling collision of calls
AssigneeNokia Telecommunications Oy
InventorsJussi Sarpola, Vesa Heikkila, Ari-Pekka Taskila, Heimo Pentikainen, Olli Liinamaa, Pekka Rusi
Life of this patent
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Abstract
A method and a subscriber unit and a subscriber network element, in a radio system provided with a wireless local loop, for handling a collision of an outgoing call from the subscriber unit and a terminating call at the subscriber unit. When the collision is detected, the switching of the outgoing call is interrupted, a release frame is transmitted to the subscriber unit, a busy tone is transmitted from the subscriber unit to a subscriber in response to the release frame, a calling is transmitted to the subscriber unit, and the terminating call is switched to the subscriber unit after responding to the calling.
Claims11
A method for handling a collision of an outgoing call from a subscriber unit and a terminating call at a subscriber unit in a radio system providing a wireless local loop, the method comprising:
- interrupting a switching of the outgoing call from the subscriber unit;
- transmitting a release frame to the subscriber unit;
- transmitting a busy tone from the subscriber unit to a subscriber in response to the release frame;
- transmitting a calling to the subscriber unit;
- and
- switching the terminating call to the subscriber unit after the subscriber unit has responded to the calling.
An apparatus comprising:
- a subscriber network element of a radio system providing a wireless local loop, the subscriber network element having a data transfer connection with a local exchange of a public switched telephone network, the subscriber network element comprising:
- means for establishing, via base stations, a radio connection to subscriber units located in a coverage area of the radio system, and for transmitting telecommunication signals between the subscriber units and the local exchange,
- means for detecting a collision between an outgoing call from a given subscriber unit and a call terminating at the given subscriber unit,
- interruption means for interrupting a switching of the outgoing call and for sending a release frame to the subscriber unit when the collision is detected, and
- means responsive to the interruption means for sending a calling to the subscriber unit after transmitting the release frame.
A subscriber unit of a radio system providing a wireless local loop, the subscriber unit comprising:
- a user interface;
- and
- a terminal equipment including:
- receiver means for receiving radio-frequency signals, and
- a signal generator, responsive to the receiver means and to the user interface, for generating and feeding a predetermined voice-frequency signal to the user interface when the receiver means receives a release frame during an OFF-hook state of the user interface.
A subscriber unit of a radio system providing a wireless local loop, the subscriber unit comprising:
- a user interface;
- and
- a terminal equipment including:
- a receiver for receiving radio-frequency signals, and
- a signal generator, responsive to the receiver and to the user interface, for generating and feeding a predetermined voice-frequency signal to the user interface when the receiver receives a release frame during an OFF-hook state of the user interface.
Dependencies are inferred from the claim text.