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US 6,647,006 B1Granted
High-speed data transmission in a mobile system
AssigneeNokia Networks Oy
InventorJuha Räsänen
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AssigneeNokia Networks Oy
InventorJuha Räsänen
Estimating the term…
A channel configuration of a digital mobile system comprises two or more lower-rate transmission channels for each high-speed radio interface traffic channel at the network interface between a base station and an interworking function. Radio frames, such as EDGE frames, are transferred on a radio interface traffic channel. Transmission frames, such as TRAU frames, are transferred on transmission channels. The total data rate at the network interface is greater than the data rate at the radio interface. According to the invention, the total data rates of the network interface and the radio interface are rate-adapted by transferring fill data in transmission frames in addition to payload between the base station and the interworking function, such that the average data rate of the payload at the network interface corresponds to the total data rate at the radio interface, and the combined total data rate of the fill data and the payload corresponds to the total data rate at the network interface.
A data transmission method in a digital mobile communications system, the method comprising the steps of
A digital mobile system where a channel configuration of a data call comprises N traffic channels at a radio interface between a base station and a mobile station, and M transmission channels between a radio access network element, such as a base station, and an interworking function, where N and M are integers and M≧2N, the data being transferred in transmission of frames on transmission channels and in radio frames on radio interface traffic channels, a total data rate at the radio interface being N*S1 and the total data rate at a network interface being M*S2, where S1 is a data rate of a single traffic channel and S2 is a data rate of a single transmission channel, and S2<S1 and M*S2>N*S1,
A base station in a mobile system where a channel configuration of a data call comprises N traffic channels at a radio interface between said base station and a mobile station, and M transmission channels between the base station and an interworking function, where N and M are integers and M≧2N, the data being transferred in transmission frames on transmission channels and in radio frames on radio interface traffic channels, a total data rate at the radio interface being N*S1 and a total data rate at a network interface being M*S2, where S1 is a data rate of a single traffic channel and S2 is a data rate of a single transmission channel, and S2<S1 and M*S2>N*S1, said base station being arranged to rate-adapt the total data rates of the network interface and the radio interface by transferring between the base station and the interworking function fill data in said transmission frames in addition to actual data, so that an average data rate at the network interface corresponds to the total data rate N*S1 at the radio interface and the combined data rate of the fill data and the actual data corresponds to the total data rate M*S2 at the network interface.
Dependencies are inferred from the claim text.