Abstract
A method for uplink synchronization of a first transceiver and a second transceiver in a multi-user cellular communication system having communication resources divided into communication channels. The method includes the following steps. A first signature sequence is transmitted from the second transceiver to the first transceiver, where the signature sequence is selected from a first set of signature sequences. In the first transceiver, the received signal is correlated with at least one signature sequence from a second set of signature sequences to estimate the time of arrival of the signature sequence to synchronize transmission between the second transceiver and the first transceiver. In transmitting the first signature sequence from the second transceiver to the first transceiver, the first signature sequence constitutes at least part of a zero-correlation zone sequence.
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4G | 03/03/2009 | ISLD-200904-001 | HUAWEI | Yes | Family Member | ||||
5G | 22/10/2018 | ISLD-201810-041 | HUAWEI |
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4G | 24/06/2021 | ISLD-202106-041 | HUAWEI |
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Specification Information
Specification Information
Technologies
Family Information
All Granted Patents In Patent Family : | ---- |
All Pending Patents In Patent Family : | ---- |
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CN101326739B | 4G | 03/03/2009 | ISLD-200904-001 | HUAWEI | No | Family Member | ||||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
US2018279382A1 | 4G | 03/03/2009 | ISLD-200904-001 | HUAWEI | No | Family Member | ||||
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Yes | Basis Patent | |||
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No | Family Member | |||
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PL2637318T3 | 4G | 24/06/2021 | ISLD-202106-041 | HUAWEI |
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No | Family Member | |||
US10779330B2 | ----- | ----- | ----- | ----- | ----- | ----- | ----- |
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Technologies


Product


Use Cases

Services

Claim
1. A method for performing an uplink synchronization between a first transceiver and a second transceiver within a cell in a multi-user cellular communication system, the method comprising:
receiving, by the first transceiver, a signal from the second transceiver for the uplink synchronization, the signal comprising a first signature sequence, wherein said first signature sequence is selected from a first set of signature sequences, and
correlating, the received signal with a second signature sequence in the first transceiver, the second signature sequence selected from a second set of signature sequences to estimate a time of arrival of said first signature sequence, so as to synchronize a transmission between the second transceiver and the first transceiver,
wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.', 'receiving, by the first transceiver, a signal from the second transceiver for the uplink synchronization, the signal comprising a first signature sequence, wherein said first signature sequence is selected from a first set of signature sequences, and', 'correlating, the received signal with a second signature sequence in the first transceiver, the second signature sequence selected from a second set of signature sequences to estimate a time of arrival of said first signature sequence, so as to synchronize a transmission between the second transceiver and the first transceiver,', 'wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.
2. The method according to claim 1, wherein correlating the received signal with the second signal sequence comprises:
correlating one or more predetermined number of delays of the received signal with the second signature sequence for calculating one or more amplitudes of aperiodic cross-correlation;
determining a delay p corresponding to the maximum amplitude of the one or more amplitudes; and
estimating the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the second transceiver and the first transceiver.', 'correlating one or more predetermined number of delays of the received signal with the second signature sequence for calculating one or more amplitudes of aperiodic cross-correlation;', 'determining a delay p corresponding to the maximum amplitude of the one or more amplitudes; and', 'estimating the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the second transceiver and the first transceiver.
3. The method according to claim 1, wherein the correlating the received signal with the second signal sequence comprises:
correlating one or more predetermined number of delays of the received signal with the second signature sequence in the first transceiver using a set of matched filters,
detecting a peak output from each matched filter, and
using the detected peak output from each filter to estimate the time of arrival of the received signal, so as to synchronize the transmission between the second transceiver and the first transceiver.', 'correlating one or more predetermined number of delays of the received signal with the second signature sequence in the first transceiver using a set of matched filters,', 'detecting a peak output from each matched filter, and', 'using the detected peak output from each filter to estimate the time of arrival of the received signal, so as to synchronize the transmission between the second transceiver and the first transceiver.
4. The method according to claim 1, wherein correlating the received signal with the second signal sequence comprises:
correlating one or more predetermined number of delays of the received signal with each signature sequence in said second set of signature sequences for calculating one or more amplitudes of aperiodic cross-correlation;
determining a delay p corresponding to the maximum amplitude of the one or more amplitudes; and
estimating the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the second transceiver and the first transceiver.', 'correlating one or more predetermined number of delays of the received signal with each signature sequence in said second set of signature sequences for calculating one or more amplitudes of aperiodic cross-correlation;', 'determining a delay p corresponding to the maximum amplitude of the one or more amplitudes; and', 'estimating the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the second transceiver and the first transceiver.
5. The method according to claim 1, wherein each signature sequence in the first and the second set of signature sequences is taken from a set of Generalized Chirp-Like sequences obtained by modulating a Zadoff-Chu sequence with an orthogonal set of complex sequences.
6. The method according to claim 1, wherein said first signature sequence is randomly selected from the first set of signature sequences.
7. The method according to claim 1, wherein said first set of signature sequences and said second set of signature sequences are the same set of signature sequences.
8. The method according to claim 1, further comprising:
transmitting a reference representing a particular set of signature sequences to the second transceiver, and wherein the reference is used by the second transceiver to retrieve a signature sequence set scheme to be used.', 'transmitting a reference representing a particular set of signature sequences to the second transceiver, and wherein the reference is used by the second transceiver to retrieve a signature sequence set scheme to be used.
9. The method according to claim 1, wherein said first signature sequence is generated by truncating a sequence with a zero-correlation zone
10. The method according to claim 1, further comprising:
performing, by said second transceiver, a downlink synchronization with said first transceiver prior to the uplink synchronization.', 'performing, by said second transceiver, a downlink synchronization with said first transceiver prior to the uplink synchronization
11. The method according to claim 1, wherein the second set of signature sequences comprises one or more signature sequences of the first set of signature sequences
12. The method according to claim 1, wherein the first signature sequence is used as a preamble portion of a signal transmitted by a mobile terminal to a base station over a random access channel
13. The method according to claim 1, wherein the first signature sequence is used as a portion of a synchronization signal transmitted by a mobile terminal to a base station
14. The method according to claim 2, wherein the zero-correlation zone of said first signature sequence has a length that substantially corresponds to a maximum expected delay of a transmission from the second transceiver to the first transceiver
15. The method according to claim 5, wherein the orthogonal set of complex sequences is one of the following:
a set of rows and/or columns of a discrete Fourier transform matrix, and
a set of rows and/or columns in a Hadamard matrix.', 'a set of rows and/or columns of a discrete Fourier transform matrix, and', 'a set of rows and/or columns in a Hadamard matrix
16. The method according to claim 14, wherein a cell size is used to determine the maximum delay in said correlating step and/or the maximum expected delay of the transmission from the second transceiver to the first transceiver
17. An apparatus, comprising:
a transceiver, configured to receive a signal from another transceiver for performing an uplink synchronization, said signal comprising a first signature sequence, wherein said first signature sequence is selected from a first set of signature sequences, and
a correlator configured to correlate the received signal with a second signature sequence selected from a second set of signature sequences to estimate a time of arrival of said first signature sequence, so as to synchronize a transmission between the other transceiver and the transceiver of the apparatus,
wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.', 'a transceiver, configured to receive a signal from another transceiver for performing an uplink synchronization, said signal comprising a first signature sequence, wherein said first signature sequence is selected from a first set of signature sequences, and', 'a correlator configured to correlate the received signal with a second signature sequence selected from a second set of signature sequences to estimate a time of arrival of said first signature sequence, so as to synchronize a transmission between the other transceiver and the transceiver of the apparatus,', 'wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.18. The apparatus according to claim 17, wherein said correlator is further configured to
correlate one or more predetermined number of delays of the received signal with the second signature sequence for calculating one or more amplitudes of aperiodic cross-correlation,
determine a delay p corresponding to the maximum amplitude of the one or more amplitudes, and
estimate the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.', 'correlate one or more predetermined number of delays of the received signal with the second signature sequence for calculating one or more amplitudes of aperiodic cross-correlation,', 'determine a delay p corresponding to the maximum amplitude of the one or more amplitudes, and', 'estimate the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.19. The apparatus according to claim 17, wherein the correlator is further configured to:
correlate one or more predetermined number of delays of the received signal with the second signature sequence using a set of matched filters,
detect a peak output from each matched filter, and
use the detected peak output from each filter to estimate the time of arrival of the received signal, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.', 'correlate one or more predetermined number of delays of the received signal with the second signature sequence using a set of matched filters,', 'detect a peak output from each matched filter, and', 'use the detected peak output from each filter to estimate the time of arrival of the received signal, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.
20. The apparatus according to claim 17, wherein the correlator is further configured to:
correlate one or more predetermined number of delays of the received signal with each signature sequence in said second set of signature sequences calculating one or more amplitudes of aperiodic cross-correlation,
determine a delay p corresponding to the maximum amplitude of the one or more amplitudes, and
estimate the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.', 'correlate one or more predetermined number of delays of the received signal with each signature sequence in said second set of signature sequences calculating one or more amplitudes of aperiodic cross-correlation,', 'determine a delay p corresponding to the maximum amplitude of the one or more amplitudes, and', 'estimate the time of arrival of said first signature sequence using the delay p, so as to synchronize the transmission between the other transceiver and the transceiver of the apparatus.
21. The apparatus according to claim 17, wherein said first set of signature sequences and said second set of signature sequences are the same set of signature sequences.
22. The apparatus according to claim 17, wherein the apparatus is a base station.
23. The apparatus according to claim 17, wherein the second set of signature sequences comprises one or more signature sequences of the first set of signature sequences.
24. The apparatus according to claim 17, wherein the first signature sequence is used as a preamble portion of a signal transmitted by a mobile terminal to a base station over a random access channel.
25. The apparatus according to claim 17, wherein the first signature sequence is used as a portion of a synchronization signal transmitted by a mobile terminal to a base station.
26. The apparatus according to claim 18, wherein the zero-correlation zone of said first signature sequence has a length that substantially corresponds to a maximum expected delay of a transmission from the other transceiver to the transceiver of the apparatus.
27. The apparatus according to claim 26, wherein a cell size is used to determine the maximum delay in said correlating step and/or the maximum expected delay of a transmission from the other transceiver to the transceiver of the apparatus.
28. An apparatus within a cell of a multi-user cellular communication system, comprising:
a unit configured to select a first signature sequence from a first set of signature sequences,
a transmitter configured to transmit a signal for an uplink synchronization between the apparatus and a receiver, said signal comprising the first signature sequence, so as to enable the receiver to estimate the time of arrival of said first signature sequence by correlating the signal with a second signature sequence selected from a second set of signature sequences, wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.', 'a unit configured to select a first signature sequence from a first set of signature sequences,', 'a transmitter configured to transmit a signal for an uplink synchronization between the apparatus and a receiver, said signal comprising the first signature sequence, so as to enable the receiver to estimate the time of arrival of said first signature sequence by correlating the signal with a second signature sequence selected from a second set of signature sequences, wherein said first signature sequence is generated, at least in part, from a sequence with a zero-correlation zone.
29. The apparatus according to claim 28, wherein the apparatus is a mobile terminal.
30. The apparatus according to claim 28, wherein the first signature sequence is used as a preamble portion of a signal transmitted by a mobile terminal to a base station over a random access channel.
31. The apparatus according to claim 28, wherein the first signature sequence is used as a portion of a synchronization signal transmitted by a mobile terminal to a base station.']
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SUMMARY
ClaimChart-US8254367B2
Patent number:US8254367B2
Claim Chart Type : SEP Claim Chart
Technology: 5G
Price: 200 €
SUMMARY
ClaimChart-US8254367B2
Patent number:US8254367B2
Claim Chart Type : SEP Claim Chart
Technology: 5G
Price: 200 €
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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