Method for data communication and controlling device therefor
First Claim
1. A method of data communication over transmission channels between a central base station (BS) and a plurality of mobile subscriber stations (M) in a mobile radio communication system, wherein a downlink transmission channel is divided into a plurality of frames each comprising a plurality of time slots of a constant length, whereas an uplink transmission channel is divided into a plurality of frames each comprising a plurality of time slots of a variable length, and access to the transmission channel uses a time division multiple access (TDMA) scheme, and wherein the BS and a specific M support a plurality of methods of coding and/or modulating a payload for transmission over the transmission channel, the method being for selecting the coding and/or modulating method, and comprising the steps of:
- detecting a load of the transmission channel; and
selecting, for each time slot, the coding and/or modulating method in dependence upon the detected load, wherein the combination of coding and/or modulation is determined individually for each time slot of one downlink frame.
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Accused Products
Abstract
For communicating data on a transmission channel (1, 2) between a central station (BS) and a plurality of subscriber stations (M), for each transmission connection between the central station (BS) and a specific subscriber station (M), a method for coding and/or modulating the payload to be transmitted is selected among a plurality of methods supported by the central station (BS) and the specific subscriber station (M). To this end, the load of the transmission channel (1, 2) is detected, and the selection is carried out taking account of the detected load.
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Citations
27 Claims
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1. A method of data communication over transmission channels between a central base station (BS) and a plurality of mobile subscriber stations (M) in a mobile radio communication system, wherein a downlink transmission channel is divided into a plurality of frames each comprising a plurality of time slots of a constant length, whereas an uplink transmission channel is divided into a plurality of frames each comprising a plurality of time slots of a variable length, and access to the transmission channel uses a time division multiple access (TDMA) scheme, and wherein the BS and a specific M support a plurality of methods of coding and/or modulating a payload for transmission over the transmission channel, the method being for selecting the coding and/or modulating method, and comprising the steps of:
- detecting a load of the transmission channel; and
selecting, for each time slot, the coding and/or modulating method in dependence upon the detected load, wherein the combination of coding and/or modulation is determined individually for each time slot of one downlink frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- detecting a load of the transmission channel; and
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23. An access control device for controlling transmission channel access for a mobile radio communication system having a central base station (BS) and a plurality of mobile subscriber stations (M) that communicate with the BS by a downlink transmission channel divided into a plurality of frames each comprising a plurality of time slots of a constant length, and by an uplink transmission channel divided into a plurality of frames each comprising a plurality of time slots of a variable length, comprising:
- means for selecting and/or assigning, for each time slot, a coding and/or modulating method among a plurality of coding and/or modulating methods supported by the BS and a specific M in dependence on a load of the transmission channel, and adapted to determine the combination of coding and/or modulation individually for each time slot of one downlink frame.
- View Dependent Claims (24, 25, 26, 27)
Specification