Randomization of PRS frequency offsets and muting patterns in LTE for EOTDOA
First Claim
1. A method for wireless communications by a base station (BS), comprising:
- dynamically selecting a random muting pattern and a random positioning reference signal (PRS) offset, the random muting pattern having a sequence of bits with each bit indicating whether PRS are sent in a corresponding PRS occasion, wherein the random muting pattern and the random PRS offset are randomly selected using a value generated by a random number generator initialized with a seed value that is based on a time of day;
determining a set of time-frequency resources for transmitting PRS based at least on the random muting pattern and the random PRS offset;
transmitting first PRSs on the determined set of time-frequency resources to a first set of user equipments (UEs); and
transmitting second PRSs to a second set of UEs, the second PRSs transmitted according to a static PRS offset computed based on a physical cell identifier (PCID) of the BS and a static muting pattern associated with a defined periodicity, wherein the second PRSs are interleaved with the first PRSs.
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Accused Products
Abstract
Certain aspects of the present disclosure generally relate to randomization of positioning reference signal (PRS) frequency offsets and muting patterns in long term evolution (LTE) for enhanced observed time difference of arrival (eOTDOA). According to certain aspects, a method is provided for wireless communications which may be performed, for example, by a base station (BS). The method generally includes randomly selecting at least one parameter used to determine a set of time-frequency resources for transmitting positioning reference signals (PRS) and transmitting PRS on the determined set of time-frequency resources. The user equipment (UE) may randomly select the at least one parameter used to determine the set of time-frequency resources to measure for the PRS from the BS and measure PRS on the determined set of time-frequency resources.
12 Citations
18 Claims
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1. A method for wireless communications by a base station (BS), comprising:
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dynamically selecting a random muting pattern and a random positioning reference signal (PRS) offset, the random muting pattern having a sequence of bits with each bit indicating whether PRS are sent in a corresponding PRS occasion, wherein the random muting pattern and the random PRS offset are randomly selected using a value generated by a random number generator initialized with a seed value that is based on a time of day; determining a set of time-frequency resources for transmitting PRS based at least on the random muting pattern and the random PRS offset; transmitting first PRSs on the determined set of time-frequency resources to a first set of user equipments (UEs); and transmitting second PRSs to a second set of UEs, the second PRSs transmitted according to a static PRS offset computed based on a physical cell identifier (PCID) of the BS and a static muting pattern associated with a defined periodicity, wherein the second PRSs are interleaved with the first PRSs. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for wireless communications by a user equipment (UE), comprising:
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randomly selecting a muting pattern and a positioning reference signal (PRS) offset, wherein; the muting pattern comprises a sequence of bits with each bit indicating whether PRS are sent in a corresponding PRS occasion; and the muting pattern and the PRS offset are randomly selected using a value generated by a random number generator initialized with a seed value; determining a set of time-frequency resources for measuring PRS based at least on the muting pattern and the PRS offset; and measuring the PRS on the set of time-frequency resources. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus for wireless communications, comprising:
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means for dynamically selecting a random muting pattern and a random positioning reference signal (PRS) offset, the muting pattern having a sequence of bits with each bit indicating whether PRS are sent in a corresponding PRS occasion, wherein the random muting pattern and the random PRS offset are randomly selected using a value generated by a random number generator initialized with a seed value that is based on a time of day; means for determining a set of time-frequency resources for transmitting PRS based at least on the random muting pattern and the random PRS offset; means for transmitting first PRSs on the determined set of time-frequency resources to a first set of user equipments (UEs); and means for transmitting second PRSs to a second set of UEs, the second PRSs transmitted according to a static PRS offset computed based on a physical cell identifier (PCID) of the BS and a static muting pattern associated with a defined periodicity, wherein the second PRSs are interleaved with the first PRSs. - View Dependent Claims (16)
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17. An apparatus for wireless communications, comprising:
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means for randomly selecting a muting pattern and a positioning reference signal (PRS) offset, wherein; the muting pattern comprises a sequence of bits with each bit indicating whether PRS are sent in a corresponding PRS occasion; and the muting pattern and the random PRS offset are randomly selected using a value generated by a random number generator initialized with a seed value means for determining a set of time-frequency resources for measuring PRS based at least on the muting pattern and the PRS offset; and means for measuring the PRS on the set of time-frequency resources. - View Dependent Claims (18)
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Specification