FEMTO-ASSISTED LOCATION ESTIMATION IN MACRO-FEMTO HETEROGENEOUS NETWORKS
First Claim
1. A system, comprising:
- a memory to store instructions; and
a processor, coupled to the memory, that facilitates execution of the instructions to perform operations, the operations comprising;
receiving base station information related to a user equipment;
receiving particle information for a first set of particles corresponding to possible user equipment locations and embodying at least one latent variable of a state space; and
determining user equipment location information based on a first particle filtering applied to the first set of particles, wherein particle filtering comprises determining a distribution of the at least one latent variable at a time specified in a defined state space.
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Abstract
The disclosed subject matter relates to a wireless communications environment. Femto-assisted location estimation schemes can determine UE location information based on information from either macro base stations or femto base stations in a LTE-A heterogeneous network. Positions information for a femto base station can be employed even though the exact positions of fBS may not be available. The femto base station position information can be depicted as a probabilistic distribution. Bayesian estimation based on TDOA and utilization of a particle filter can facilitate determining UE location information. Furthermore, a simplified scheme can reduce computational complexity.
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Citations
37 Claims
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1. A system, comprising:
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a memory to store instructions; and a processor, coupled to the memory, that facilitates execution of the instructions to perform operations, the operations comprising; receiving base station information related to a user equipment; receiving particle information for a first set of particles corresponding to possible user equipment locations and embodying at least one latent variable of a state space; and determining user equipment location information based on a first particle filtering applied to the first set of particles, wherein particle filtering comprises determining a distribution of the at least one latent variable at a time specified in a defined state space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A computer-readable storage medium having computer-executable instructions that, in response to execution, cause a computing device including a processor to perform operations, comprising:
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receiving femto base station timing information related to a user equipment; receiving macro base station timing information related to the user equipment; receiving particle information for a first set of particles corresponding to possible user equipment locations; receiving femto base station position information; and determining user equipment location information based on a first particle filtering applied to the first set of particles, the first particle filtering employing the femto base station timing information and the macro base station timing information. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A method, comprising:
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receiving femto base station timing information related to a user equipment; receiving macro base station timing information related to the user equipment; receiving particle information for a first set of particles corresponding to possible user equipment locations; receiving femto base station position information; and determining user equipment location information based on a first particle filtering for particle filtering the first set of particles based on the base station information. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A system, comprising:
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means for receiving first macro base station information related to a user equipment; means for receiving femto base station information related to a user equipment; means for receiving second macro base station information related to a possible position of a femto base station device; means for determining femto base station position information based on a first particle filtering of a first set of particles corresponding to the second macro base station information; means for receiving particle information for a second set of particles corresponding to possible user equipment locations; and means for determining, by time difference of arrival information, user equipment location information based on a second particle filtering of the second set of particles based on the first macro base station information, femto base station information, and the femto base station position information. - View Dependent Claims (37)
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Specification