Methods and apparatus to transmit and receive synchronization signals in a mobile communication system
First Claim
1. A base station, comprising:
- an antenna array configured to transmit beam-steered signals in each of a plurality of slices with a sector; and
a transmitter configured to cause the antenna array to transmit a sequence of primary synchronization symbols within predetermined symbol positions in at least one slot of a subframe,wherein the sequence of primary synchronization symbols includes primary synchronization symbols transmitted on different slices of the plurality of slices, andwherein a first primary synchronization symbol is transmitted in a first symbol position on a first slice of the plurality of slices, and the first primary synchronization symbol is re-transmitted in an (S+n)th symbol position on the first slice, where S is the number of the plurality of slices within the sector and n is an integer value.
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Accused Products
Abstract
Beam-steered millimeter wave signals transmitted in each of n sector slices include a sequence of primary synchronization (PSCH) symbols within predetermined symbol positions in at least one slot of a subframe. The symbols in consecutive symbol positions are each transmitted on a different one of the n slices, with the first symbol repeated on the same slice at the end. The sequence order rotates cyclically in each subframe so that two PSCH symbols are transmitted on one slice in a single subframe every nth subframe. Secondary synchronization (SSCH) and Broadcast Channel (BCH) symbols are transmitted in a predetermined pattern following the sequence of PSCH symbols. By transmitting consecutive PSCH symbols on different slices and repeating the first symbol, the mobile station can detect the best slice and beam by switching receive beams every subframe instead of every slot, relaxing time constraints on AGC adjustment while avoiding the start-at-the-edge problem.
19 Citations
32 Claims
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1. A base station, comprising:
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an antenna array configured to transmit beam-steered signals in each of a plurality of slices with a sector; and a transmitter configured to cause the antenna array to transmit a sequence of primary synchronization symbols within predetermined symbol positions in at least one slot of a subframe, wherein the sequence of primary synchronization symbols includes primary synchronization symbols transmitted on different slices of the plurality of slices, and wherein a first primary synchronization symbol is transmitted in a first symbol position on a first slice of the plurality of slices, and the first primary synchronization symbol is re-transmitted in an (S+n)th symbol position on the first slice, where S is the number of the plurality of slices within the sector and n is an integer value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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transmitting beam-steered signals in each of a plurality of slices within a sector; and transmitting a sequence of primary synchronization symbols within predetermined symbol positions in at least one slot of a subframe, wherein the sequence of primary synchronization symbols includes primary synchronization symbols transmitted on different slices of the plurality of slices, and wherein a first primary synchronization symbol is transmitted in a first symbol position on a first slice of the plurality of slices, and the first primary synchronization symbol is re-transmitted in an (S+n)th symbol position on the first slice, where S is the number of the plurality of slices within the sector and n is an integer value. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification