Mobile communications system which uses TDMA for speech data and OFDM for control/extended data
First Claim
1. Communications apparatus for mobile telephones, arranged to transmit first encoded data in accordance with a first protocol (202) and to transmit extended data in accordance with a second protocol (601), comprisingfirst transmission means configured to transmit encoded speech data over time slots within time division multiple access frames;
- and second transmitting means for transmitting said extended data, wherein a second bandwidth for transmission of said extended data is divided into time slots substantially similar to said time slots for said first data which are substantially in phase with time slots for said speech data while occurring at a higher data rate than the data rate for the transmission of said speech data.
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Accused Products
Abstract
Mobile communications apparatus (103) are arranged to transmit encoded speech in accordance with a first protocol and to transmit extended data in accordance with a second protocol. A wideband extension (601) is divided into time slots (TN0-TN7) which are substantially in phase with time slots for speech transmission. Signalling channels provided for speech are also used for establishing data calls within the extension. Extended data is conveyed by a process of orthogonal frequency division multiplexing is created (804). The multiplex is created by an inverse fast Fourier transform (903) and the transmission frequencies undergo a hopping sequence.
42 Citations
37 Claims
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1. Communications apparatus for mobile telephones, arranged to transmit first encoded data in accordance with a first protocol (202) and to transmit extended data in accordance with a second protocol (601), comprising
first transmission means configured to transmit encoded speech data over time slots within time division multiple access frames; - and
second transmitting means for transmitting said extended data, wherein a second bandwidth for transmission of said extended data is divided into time slots substantially similar to said time slots for said first data which are substantially in phase with time slots for said speech data while occurring at a higher data rate than the data rate for the transmission of said speech data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Communications apparatus for mobile telephones, arranged to transmit first encoded data in accordance with a first protocol (202) and to transmit extended data in accordance with a second protocol (606), comprising
a first transmission means for transmitting said first data over time slots within time division multiple access frames encoded in accordance with GSM recommendations; - and
second transmitting means for transmitting said extended data, wherein a second bandwidth for transmission of said extended data is divided into time slots substantially similar to said time slots for said first data, wherein, said first transmission means and said second transmitting means transmit data within frames having eight time slots. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Communications apparatus for mobile telephones, arranged to transmit first encoded data in accordance with a first protocol (202) and to transmit extended data in accordance with a second protocol (606), comprising
first transmission means for transmitting said first data over time slots within time division multiple access frames; - and
second transmitting means for transmitting said extended data, wherein a second bandwidth for transmission of said extended data is divided into time slots substantially similar to said time slots for said first data, wherein said first transmission means includes signalling means arranged to communicate via signalling channels, and said signalling means are arranged to establish data calls for said second transmitting means. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of mobile telephony, wherein first encoded data is transmitted in accordance with a first protocol and extended data is transmitted in accordance with a second protocol, comprising the steps of
transmitting encoded speech data over time slots within time division multiple access frames; - and
transmitting said extended data, wherein a second bandwidth for transmission of said extended data is divided into time slots substantially similar to said time slots for said first data which are substantially in phase with time slots for said speech data while occurring at a higher data rate than the data rate for the transmission of said speech data. - View Dependent Claims (32, 33, 34)
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35. A method of mobile telephony, wherein first encoded data is transmitted in accordance with a first protocol and extended data is transmitted in accordance with a second protocol, comprising the steps of
transmitting first data over time slots within time division multiple access frames encoded in accordance with GSM recommendations; - and
transmitting said extended data via a second bandwidth divided into time slots substantially similar to time slots for said first data, wherein said first transmission and said second transmission occur within frames having eight time slots. - View Dependent Claims (36)
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37. A method of mobile telephone, wherein first encoded data is transmitted in accordance with a first protocol and extended data is transmitted in accordance with a second protocol, comprising steps of
transmitting said first data over time slots within time division multiple access frames and transmitting said extended data within a second bandwidth for transmission of said extended data divided into time slots substantially similar to the time slots for the transmission of said first data, wherein said first transmission procedure includes signalling means arranged to communicate via said signalling channels, and said signalling procedures arranged to establish data calls for said second transmission procedures.
Specification