Wireless mutliplex data transmission system
DC CAFCFirst Claim
1. A method of wireless transmission of data in digital and/or analogue format through a communications channel from at least two data sensors to a data processing means said method comprising the step of division of said channel into sub-channels and transmitting said data from said data sensors respectively though said sub-channels accordingly;
- characterized bya) said step of division of said communications channel being effected asymmetrically whereby the data carrying capacities of said sub-channels are unequal; and
b) the data rate required for data transmission from said local sensors differing substantially between said at least two sensors; and
c) allocating data from said local data sensors to respective ones or groups of said sub-channels in accordance with the data carrying capacities of said sub-channels.
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Abstract
A method and apparatus for wireless transmission of data through a communications channel between at least two local data sensors (for example automotive diagnostic data sensors or NVH sensors), which may include a primary data-processing function, and data-processing function (for example a PC) to receive data therefrom. The system provides for asymmetrical division of the communications channel on a frequency or time-division or packet-switching basis so that the corresponding asymmetrical data transmission requirement of the local data sensors are matched to the capacity of their respective sub-channels whereby a single channel is capable of transmitting all the required data. A particularly practical application is to noise vibration harshness analysis of wireless-transmitted data from three-dimensionally spaced NVH sensors enabling special pinpointing of vibration sources in automotive warranty analysis studies.
25 Citations
21 Claims
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1. A method of wireless transmission of data in digital and/or analogue format through a communications channel from at least two data sensors to a data processing means said method comprising the step of division of said channel into sub-channels and transmitting said data from said data sensors respectively though said sub-channels accordingly;
- characterized by
a) said step of division of said communications channel being effected asymmetrically whereby the data carrying capacities of said sub-channels are unequal; and
b) the data rate required for data transmission from said local sensors differing substantially between said at least two sensors; and
c) allocating data from said local data sensors to respective ones or groups of said sub-channels in accordance with the data carrying capacities of said sub-channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- characterized by
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12. Apparatus for wireless transmission of data in digital and/or analogue format through a communications channel from at least two local data sensors to a data processing means, the apparatus comprising a multiplexer adapted to effect division of said communications channel into sub-channels, and a transmitter adapted to transmit said data through said sub-channels accordingly;
- characterized by
a) said multiplexer being adapted to divide said communications channel asymmetrically whereby the data carrying capacities of said sub-channels are unequal; and
b) control means adapted to allocate data from said local data sensors to respective ones or groups of said communications sub-channels in accordance with substantially different data rate requirements from said local sensors. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
- characterized by
Specification