Data Communications
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Accused Products
Abstract
An apparatus and method are provided for communicating data between a first and a second terminal unit, wherein at least one of the terminal units is a mobile terminal unit. The apparatus comprises a base station and a number of antenna units each linked to the base station and operable to transmit, wirelessly, modulated data signals received from the base station, and to forward modulated data signals, received wirelessly, to the base station. The base station has a transmitter for transmitting modulated data signals to each of the antenna units for wireless transmission, a receiver for receiving modulated data signals forwarded by at least one of the antenna units and a demodulator for demodulating received modulated data signals that have been modulated according to a predetermined modulation scheme. In the predetermined modulation scheme, successive blocks of modulated data are arranged such that a predetermined minimum time period elapses between the arrival, at the receiver, of a first and the arrival of a second of the successive modulated data blocks and wherein, in operation, the predetermined minimum time period is adjusted to be at least as long as the maximum delay that may occur at the receiver from a time of first arrival of a modulated data block by means of a first of the antenna units to a time of second arrival of the same modulated data block by means of a different respective one of the antenna units.
44 Citations
26 Claims
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1-11. -11. (canceled)
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12. An apparatus, operable to communicate data between a first and a second terminal unit, wherein at least one of said first and second terminal units is a mobile terminal unit, the apparatus comprising:
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a base station; and
a plurality of antenna units having different areas of coverage, wherein each antenna unit is linked to said base station and is operable to transmit, wirelessly, modulated data signals received from said base station, and to forward modulated data signals, received wirelessly, to said base station, wherein said base station comprises;
a transmitter for transmitting modulated data signals to each of said plurality of antenna units for wireless transmission;
a receiver for receiving modulated data signals forwarded by at least one of said plurality of antenna units; and
a demodulator for demodulating received modulated data signals in respect of a given data channel that have been modulated according to a predetermined modulation scheme, whereby, according to said predetermined scheme, successive blocks of modulated data in said data channel are arranged such that a predetermined minimum time period elapses between the arrival, at the receiver, of a first and the arrival of a second of said successive modulated data blocks and wherein, for a given arrangement of said plurality of antenna units, said predetermined minimum time period is set to correspond to a time interval at said receiver from the time of first arrival to the time of latest arrival of the first of said successive modulated data blocks in said data channel by means of antenna units in said given arrangement. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of communicating data between a first, mobile, terminal unit and a second terminal unit over a data channel established by means of a plurality of antenna units, having different areas of coverage, and an associated base station to the second terminal unit, the method comprising the steps of:
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(i) at the first, mobile, terminal unit, generating a modulated data signal according to a predetermined modulation scheme;
(ii) transmitting the modulated data signal wirelessly for reception by at least one of said plurality of antenna units; and
(iii) at the associated base station, demodulating the received modulated data signal in said data channel for communication to the second terminal unit, wherein, at step (i), according to said predetermined modulation scheme, successive blocks of modulated data in said data channel are arranged such that a predetermined minimum time period elapses between the arrival, at the base station, of a first and the arrival of a second of said successive modulated data blocks and wherein, for a given arrangement of said plurality of antenna units, said predetermined minimum time period is set to a time interval at the base station from the time of first arrival to the time of latest arrival of the first of said successive modulated data blocks in said data channel by means of antenna units in said given arrangement. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification