Dynamic allocation of radio resources in a packet switched communications-system
First Claim
1. A method of controlling communication between user stations using a mobile communications system having a radio interface, and a data packet handler coupled to a packet data network, the method comprising:
- holding control data, wherein the control data indicates a state of a call between a first user station and a second user station;
dynamically assigning radio resources for the transfer of data packets carrying call data for the call over the radio interface, such that the amount of radio resources assigned varies in accordance with the amount of call data to be transferred at different points in the call; and
controlling the transfer of data packets between a first and a second user station in accordance with the control data.
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Accused Products
Abstract
Voice and/or image data packets are transferred by a packet handler between user stations in a GSM-type mobile communications system using a General Packet Radio Service (GPRS) data link. Control data for controlling a call is stored in a data store accessible by the packet handler. The control data identifies call participants and the identity of a participant who has currently seized the call. A mobile station capable of video conferencing is operable in a half-duplex video conferencing mode, in which intermittent transmission of video data is controlled by depression of a transmit button.
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Citations
24 Claims
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1. A method of controlling communication between user stations using a mobile communications system having a radio interface, and a data packet handler coupled to a packet data network, the method comprising:
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holding control data, wherein the control data indicates a state of a call between a first user station and a second user station;
dynamically assigning radio resources for the transfer of data packets carrying call data for the call over the radio interface, such that the amount of radio resources assigned varies in accordance with the amount of call data to be transferred at different points in the call; and
controlling the transfer of data packets between a first and a second user station in accordance with the control data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A mobile station adapted to communicate with a data packet handler during participation in a call in which another user station is participating, the mobile station comprising:
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a resource request system configured to dynamically request resources for the transmission of data packets carrying call data over the radio interface, such that the amount of radio resources requested varies in accordance with the amount of call data to be transmitted at different points in the call; and
a data transceiver configured to transmit and receive control data to and from the data packet handler to signal call-related control functions.
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- 17. A method of conducting communications between user stations using a mobile communications system, wherein each user station comprises a camera for picking up an image of the user and a display for displaying an image of a remote party, the method comprising establishing a data transfer connection between the user stations, and controlling the connection in a half-duplex mode such that a user station may perform one of either only receiving or only transmitting image data for a first period sufficient to receive or transmit image data forming an image, and perform the other of only receiving or only transmitting image data for a second period following the first period and sufficient to transmit or receive image data forming an image.
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24. A mobile communications station having a group dispatch mode of operation, the station comprising a camera for image data capture and an image data transmitter for transmitting the captured image data in the group dispatch mode.
Specification