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US 6,310,872 B1Granted
Packet switching in a cellular radio communication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMagnus Almgren, Per Larsson
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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMagnus Almgren, Per Larsson
Estimating the term…
The present invention relates to a device and a method for packet switching in a cellular radio communication system. Radio stations that have packets to transmit, transmit packets with a particular transmission probability (Si,n). The fraction of the transmitted packets that are received correctly by the receiving radio station, the so-called throughput fraction (ti,n), can be calculated. The transmission probability (Si,n) for a transmitting radio station is continuously updated according to a mapping function (f(a)) that depends on the value of the throughput fraction (ti,n). According to the invention a mapping function (f(a)), with a derivative with an absolute value less than one, is chosen (201). Starting values of the throughput fraction (ti,n) are generated (203) and these values are input to the mapping function. Updated values of the transmission probability (Si,n) are generated (204) by mapping function. The transmitting radio station transmits (205) packets according to the updated transmission probability, whereby a new value of the throughput fraction is generated (206). The method is repeated until the values of the throughput fraction are stable.
A method for transmission of packet data in a cellular radio communication system comprising at least two transmitting radio stations and at least two receiving radio stations, whereby at least one channel is employed in the radio communication system for transmitting packet data between said transmitting and receiving radio stations, where each radio station, having packets to transmit, transmits packets with a particular transmission probability (Si,n), whereby a particular fraction (ti,n) of the transmitted packets is correctly received for each transmitting radio station, comprising the steps of:
A device for transmission of packet data in a cellular radio communication system comprising at least two transmitting radio stations and at least two receiving radio stations, wherein at least one channel is employed in the radio communication system for transmitting packet data between said transmitting and receiving radio stations, wherein each radio station having packet data to transmit, transmits packet with a particular transmission probability (si,n), wherein a particular fraction (ti,n) of the transmitted packets are correctly received for each transmitting radio station, said device comprising:
Dependencies are inferred from the claim text.