Method and system of channel adaptation
First Claim
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1. A method of transmitting data according to a sub-frame channel structure wherein, for a radio frame channel structure of a data channel and a control channel, said method comprises the steps of:
- a first transmission time interval being an integer multiple of the duration of a radio frame; and
,a second transmission time interval smaller than the first transmission interval and corresponding to the duration of a sub-frame are definedwherein the sub-frame channel structure is applied with the second transmission time interval on the same data channel for which the first transmission time interval may be applied, allowing the first and second transmission time intervals to interchange for different radio frames of the same data channel.
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Abstract
The present invention relates to transmissions and retransmissions in a communications system. It reveals a method and system for backward compatible detection of an introduced channel sub-frame structure particularly well suited for data transmissions. The invention is well suited for a cellular mobile radio communications system, particularly a Universal Mobile Telecommunications System, UMTS.
22 Citations
30 Claims
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1. A method of transmitting data according to a sub-frame channel structure wherein, for a radio frame channel structure of a data channel and a control channel, said method comprises the steps of:
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a first transmission time interval being an integer multiple of the duration of a radio frame; and
,a second transmission time interval smaller than the first transmission interval and corresponding to the duration of a sub-frame are defined wherein the sub-frame channel structure is applied with the second transmission time interval on the same data channel for which the first transmission time interval may be applied, allowing the first and second transmission time intervals to interchange for different radio frames of the same data channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting a sub-frame channel structure transmission time interval, comprising the steps of:
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for a data channel, one or more slots corresponding to a transmission time interval of a sub-frame channel structure are received and, for a control channel, one or more transmission format control symbols of the one or more slots corresponding to those of the data channel are received; and
,a candidate decoding of a first data channel sub-frame is performed assuming transport format control information being in accordance with the transport format control information of a corresponding control channel sub-frame of the sub-frame channel structure. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A signal format for transmission of data and control signaling, wherein the signal format comprises a radio frame structure and a superimposed sub-frame structure, the radio frame being of a first duration and the sub-frame being of a second duration shorter than the first duration, the data part comprising information sufficient for determining whether or not transmissions are according to the superimposed sub-frame structure;
wherein the sub-frame structure comprises transport format control information if the information has chancjed from an earlier transmission time interval, corresponding to the second duration or an integer multiple of the first duration. - View Dependent Claims (30)
Specification