Narrow band PRACH with multiple tone hopping distances
First Claim
1. A method of wireless communication, comprising:
- transmitting a first symbol on a first tone of a Physical Random Access Channel (PRACH);
transmitting a second symbol on a second tone of the PRACH at a first hopping distance from the first tone;
transmitting a third symbol on a third tone of the PRACH; and
transmitting a fourth symbol on a fourth tone of the PRACH at a second hopping distance from the third tone.
1 Assignment
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Accused Products
Abstract
Due to the limited dimension of a NB that may be used by multiple users, as well as possible large coverage areas, timing offset estimation may be outside of NCP. The inaccuracy in the timing estimate can be improved by using more than one tone hopping distance for PRACH. An apparatus may then transmit a first and second tone of the PRACH at a first hopping distance from the first tone. The apparatus may then transmit a third tone of the PRACH and a fourth tone of the PRACH at a second hopping distance from the third tone. The second hopping distance may be greater than first hopping distance. The apparatus may also transmit an additional tone of the PRACH using a random hopping distance. A receiving apparatus may receive the transmitted PRACH and determine a phase estimation based on the sets of tones having different hopping distances.
11 Citations
40 Claims
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1. A method of wireless communication, comprising:
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transmitting a first symbol on a first tone of a Physical Random Access Channel (PRACH); transmitting a second symbol on a second tone of the PRACH at a first hopping distance from the first tone; transmitting a third symbol on a third tone of the PRACH; and transmitting a fourth symbol on a fourth tone of the PRACH at a second hopping distance from the third tone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for wireless communication at a user equipment, comprising:
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means for receiving downlink communication from a base station; and means for transmitting a first symbol on a first tone of a Physical Random Access Channel (PRACH) to the base station, wherein the means for transmitting transmits a second symbol on a second tone of the PRACH at a first hopping distance from the first tone, transmits a third symbol on a third tone of the PRACH, and transmits a fourth symbol on a fourth tone of the PRACH at a second hopping distance from the third tone. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for wireless communication, comprising:
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a memory; and at least one processor coupled to the memory and configured to; transmit a first symbol on a first tone of a Physical Random Access Channel (PRACH); transmit a second symbol on a second tone of the PRACH at a first hopping distance from the first tone; transmit a third symbol on a third tone of the PRACH; and transmit a fourth symbol on a fourth tone of the PRACH at a second hopping distance from the third tone. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A non-transitory computer-readable medium storing computer executable code for execution by at least one processor, wherein the computer executable code is for wireless communication, comprising code to:
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transmit a first symbol on a first tone of a Physical Random Access Channel (PRACH); transmit a second symbol on a second tone of the PRACH at a first hopping distance from the first tone; transmit a third symbol on a third tone of the PRACH; and transmit fourth symbol on a fourth tone of the PRACH at a second hopping distance from the third tone. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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Specification