Time shifting of co-channel data transmissions to reduce co-channel interference
First Claim
Patent Images
1. A transmitting apparatus comprising:
- a processor, coupled to a transmitter and a receiver, configured to select a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein selecting comprises progressively increasing a number of discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts transmitted during a SACCH period;
a source of first data and a source of third data;
a time reference;
a time offset allocator, coupled to the source of first data, to the source of the third data, and to the time reference, configured to delay the first data by a time offset relative to the time reference to produce first time-delayed data and configured to delay the third data by a second time offset relative to the time reference to produce second time-delayed data;
wherein the transmitter is coupled to the time offset allocator and is configured to modulate, amplify, and transmit the first time-delayed data to the first receiving apparatus to produce first transmitted data and configured to modulate and transmit the second time-delayed data to the second receiving apparatus to produce second transmitted data;
wherein the processor is coupled to the time reference, the time offset allocator, and the transmitter, and is configured to control operation of the time offset allocator; and
a memory, coupled to the processor, configured to store second data and instructions for the processor to use, the second data comprising data which represents a first delay value and a second delay value,wherein the transmitting apparatus is configured to delay the first data by a first time delay depending on the time reference and the first delay value and is configured to delay the third data by a second time delay depending on the time reference and the second delay value.
1 Assignment
0 Petitions
Accused Products
Abstract
A cellular communications system in which transmission of control signals for plural different remote stations is so displaced in time that the transmission of control signals for one remote station does not interfere with the transmission of control signals for another remote station, the displacement being sufficient to prevent contemporaneous reception of control signals by the remote station intended for the other remote station.
30 Citations
25 Claims
-
1. A transmitting apparatus comprising:
-
a processor, coupled to a transmitter and a receiver, configured to select a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein selecting comprises progressively increasing a number of discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts transmitted during a SACCH period; a source of first data and a source of third data; a time reference; a time offset allocator, coupled to the source of first data, to the source of the third data, and to the time reference, configured to delay the first data by a time offset relative to the time reference to produce first time-delayed data and configured to delay the third data by a second time offset relative to the time reference to produce second time-delayed data; wherein the transmitter is coupled to the time offset allocator and is configured to modulate, amplify, and transmit the first time-delayed data to the first receiving apparatus to produce first transmitted data and configured to modulate and transmit the second time-delayed data to the second receiving apparatus to produce second transmitted data; wherein the processor is coupled to the time reference, the time offset allocator, and the transmitter, and is configured to control operation of the time offset allocator; and a memory, coupled to the processor, configured to store second data and instructions for the processor to use, the second data comprising data which represents a first delay value and a second delay value, wherein the transmitting apparatus is configured to delay the first data by a first time delay depending on the time reference and the first delay value and is configured to delay the third data by a second time delay depending on the time reference and the second delay value. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of transmitting data, comprising:
-
selecting a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein selecting comprises progressively increasing a number of discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts to transmit during a SACCH period; delaying first data by a time offset relative to a time reference to produce first time-delayed data; delaying third data by a second time offset relative to the time reference to produce second time-delayed data; modulating, amplifying, and transmitting the first time-delayed data to the first receiving apparatus to produce first transmitted data; and modulating and transmitting the second time-delayed data to the second receiving apparatus to produce second transmitted data. - View Dependent Claims (8, 9, 10, 11, 12, 13, 22, 23, 24, 25)
-
-
14. A transmitting apparatus comprising:
-
means for selecting a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein the means for selecting comprises means for progressively increasing a number of discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts to transmit during a SACCH period; means for delaying first data by a time offset relative to a time reference to produce first time-delayed data; means for delaying third data by a second time offset relative to the time reference to produce second time-delayed data; and means for modulating, amplifying, and transmitting the first time-delayed data to the first receiving apparatus to produce first transmitted data; and means for modulating and transmitting the second time-delayed data to the second receiving apparatus to produce second transmitted data. - View Dependent Claims (15, 16, 17, 18, 19)
-
-
20. A transmitting apparatus comprising:
-
a processor; memory in electronic communication with the processor; instructions stored in the memory, the instructions being executable by the processor to; select a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein selecting comprises progressively increasing a number of discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts to transmit during a SACCH period; delay first data by a time offset relative to a time reference to produce first time-delayed data; delay third data by a second time offset relative to the time reference to produce second time-delayed data; modulate, amplify, and transmit the first time-delayed data to the first receiving apparatus to produce first transmitted data; and modulate and transmit the second time-delayed data to the second receiving apparatus to produce second transmitted data.
-
-
21. A non-transitory computer-readable media comprising code for causing a computer to:
-
select a first receiving apparatus and a second receiving apparatus for co-channel operation, wherein selecting comprises progressively increasing a number of transmitted discovery bursts transmitted in a slow associated control channel (SACCH) period until a threshold is reached, wherein the threshold relates to a maximum number of discovery bursts to transmit during a SACCH period; delay first data by a time offset relative to a time reference to produce first time-delayed data; delay third data by a second time offset relative to the time reference to produce second time-delayed data; modulate, amplify, and transmit the first time-delayed data to the first receiving apparatus to produce first transmitted data; and modulate and transmit the second time-delayed data to the second receiving apparatus to produce second transmitted data.
-
Specification