Processing data transmitted and received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system
DC CAFC
First Claim
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1. A reception controller for processing data items received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system, a single frequency channel being employed for transmitting data items pertaining to a plurality of wireless links, and ‘
- m’
orthogonal channels being provided within the single frequency channel, the receiver controller comprising;
an orthogonal code generator for providing an orthogonal code from a set of ‘
m’
orthogonal codes used to create said ‘
m’
orthogonal channels within the single frequency channel;
a first decoder for applying, to signals received on the single frequency channel, the orthogonal code provided by the orthogonal code generator, in order to isolate data items transmitted within the corresponding orthogonal channel; and
a TDM decoder arranged to extract a data item from a predetermined time slot within said orthogonal channel, a plurality of data items relating to different wireless links being transmitted within the same orthogonal channel during a predetermined frame period.
12 Assignments
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3 Petitions
Reexamination
Accused Products
Abstract
The present invention provides a transmission controller and method for processing data items to be transmitted over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system, a single frequency channel being employed for transmitting data items pertaining to a plurality of wireless links. The transmission controller comprises an orthogonal code generator for providing an orthogonal code from a set of ‘m’ orthogonal codes used to create ‘m’ orthogonal channels within the single frequency channel, and a first encoder for combining a data item to be transmitted on the single frequency channel with said orthogonal code from the orthogonal code generator, the orthogonal code determining the orthogonal channel over which the data item is transmitted, whereby data items pertaining to different wireless links may be transmitted simultaneously within different orthogonal channels of said single frequency channel. Further, the transmission controller comprises a TDM encoder arranged to apply time division multiplexing (TDM) techniques to the data item in order to insert the data item within a time slot of the orthogonal channel, whereby a plurality of data items relating to different wireless links may be transmitted within the same orthogonal channel during a predetermined frame period. The invention also provides a reception controller and method for processing data items received over a wireless link.
24 Citations
10 Claims
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1. A reception controller for processing data items received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system, a single frequency channel being employed for transmitting data items pertaining to a plurality of wireless links, and ‘
- m’
orthogonal channels being provided within the single frequency channel, the receiver controller comprising;an orthogonal code generator for providing an orthogonal code from a set of ‘
m’
orthogonal codes used to create said ‘
m’
orthogonal channels within the single frequency channel;
a first decoder for applying, to signals received on the single frequency channel, the orthogonal code provided by the orthogonal code generator, in order to isolate data items transmitted within the corresponding orthogonal channel; and
a TDM decoder arranged to extract a data item from a predetermined time slot within said orthogonal channel, a plurality of data items relating to different wireless links being transmitted within the same orthogonal channel during a predetermined frame period. - View Dependent Claims (2, 3, 4)
an overlay code generator for providing an overlay code from a first set of ‘
n’
overlay codes which are orthogonal to each other, the set of ‘
n’
overlay codes enabling ‘
n’
data items pertaining to different wireless links to be transmitted simultaneously within the same orthogonal channel; and
a second decoder, selectively operable instead of the TDM decoder, to apply to the data items of the orthogonal channel, the overlay code from the overlay code generator so as to isolate a particular data item transmitted using that overlay code.
- m’
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3. A reception controller as claimed in claim 1, wherein the orthogonal code generator is a storage arranged to store the set of orthogonal codes.
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4. A reception controller as claimed in claim 1, wherein the set of orthogonal codes comprise a set of Rademacher-Walsh (RW) codes.
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5. A subscriber terminal of a wireless telecommunications system, comprising a reception controller having:
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an orthogonal code generator for providing an orthogonal code from a set of ‘
m’
orthogonal codes used to create said ‘
m’
orthogonal channels within the single frequency channel;
a first decoder for applying, to signals received on the single frequency channel, the orthogonal code provided by the orthogonal code generator, in order to isolate data items transmitted within the corresponding orthogonal channel;
a TDM decoder arranged to extract a data item from a predetermined time slot within said orthogonal channel, a plurality of data items relating to different wireless links being transmitted within the same orthogonal channel during a predetermined frame period;
an overlay code generator for providing an overlay code from a first set of ‘
n’
overlay codes which are orthogonal to each other, the set of ‘
n’
overlay codes enabling ‘
n’
data items pertaining to different wireless links to be transmitted simultaneously within the same orthogonal channel;
a second decoder, selectively operable instead of the TDM decoder, to apply to the data items of the orthogonal channel, the overlay code from the overlay code generator so as to isolate a particular data item transmitted using that overlay code, wherein the set of orthogonal codes comprise a set of Rademacher-Walsh (RW) codes and wherein the set of orthogonal codes comprise a set of Rademacher-Walsh (RW) codes.
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6. A method of processing data items received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system, a single frequency channel being employed for transmitting data items pertaining to a plurality of wireless links, and ‘
- m’
orthogonal channels being provided within the single frequency channel, the method comprising steps of;providing an orthogonal code from a set of ‘
m’
orthogonal codes used to create said ‘
m’
orthogonal channels within the single frequency channel;
applying, to signals received on the single frequency channel, the orthogonal code in order to isolate data items transmitted within the corresponding orthogonal channel; and
extracting a data item from a predetermined time slot within said orthogonal channel, a plurality of data items relating to different wireless links being transmitted within the same orthogonal channel during a predetermined frame period. - View Dependent Claims (7, 8, 9, 10)
providing an overlay code from a first set of ‘
n’
overlay codes which are orthogonal to each other, the set of ‘
n’
overlay codes enabling ‘
n’
data items pertaining to different wireless links to be transmitted simultaneously within the same orthogonal channel; and
a second decoder, selectively operable instead of the TDM decoder, to apply to the data items of the orthogonal channel, the overlay code so as to isolate a particular data item transmitted using that overlay code.
- m’
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8. A method as claimed in claim 7, further comprising steps of:
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determining which of the orthogonal channels will be subject to TDM techniques, and transmitting that information to a plurality of subscriber terminals within the wireless telecommunications system; and
applying the overlay code to the data items of the orthogonal channel so as to isolate a particular data item transmitted using its particular overlay code.
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9. A method as claimed in claim 6, further comprising steps of:
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determining which of the orthogonal channels will be subject to TDM techniques; and
transmitting that information to a plurality of subscriber terminals within the wireless telecommunications system.
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10. A method as claimed in claim 9, further comprising a step of:
determining, for those orthogonal channels subject to TDM techniques, how many time slots will be provided within each orthogonal channel.
Specification
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Litigation Data
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Current AssigneeWireless Protocol Innovations, Inc. (Quarterhill Inc. (f/k/a Wi-LAN Inc.))
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Original AssigneeAirspan Networks Inc.
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InventorsStruhsaker, Paul F., Lysejko, Martin
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Primary Examiner(s)NGO, RICKY QUOC
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Application NumberUS09/579,349Time in Patent Office705 DaysField of Search370/328, 370/329, 370/330, 370/335, 370/336, 370/337, 370/340, 370/341, 370/342, 370/343, 370/345, 370/347, 370/441, 370/442, 370/465, 370/468, 370/479, 370/498, 370/203, 370/208, 370/209US Class Current370/209CPC Class CodesH04J 13/004 OrthogonalH04J 13/12 Generation of orthogonal codes
