Sparsed U-TDOA wireless location networks
First Claim
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1. An iterative method for designing a sparse wireless location system (WLS) overlaid on a wireless communications system (WCS), comprising:
- performing an intelligent network design process to produce a first WLS network design;
determining that an uplink demodulation performance limiting factor affects the first WLS network design; and
in response to determining that an uplink demodulation performance limiting factor affects the first WLS design, modifying the first WLS design by performing of the following to produce an updated sparse WLS design;
(a) determining whether communications system demodulation data is enabled in the WCS, and if so enabling a WLS demodulated data feature;
(b) if communications system demodulation data is not enabled in the WCS, and if an Abis monitoring system (AMS) is not deployed in the WCS, then enabling a mid-amble only correction feature in the WLS;
(c) if communications system demodulation data is not enabled in the WCS, and if an Abis monitoring system (AMS) is deployed in the WCS, then enabling an AMS-derived demodulated data feature in the WLS; and
performing another iteration of the intelligent network design process with updated design specifications and determining whether another performance limiting factor affects the updated sparse WLS design.
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Abstract
In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or downlink beacon discovery limited.
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Citations
32 Claims
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1. An iterative method for designing a sparse wireless location system (WLS) overlaid on a wireless communications system (WCS), comprising:
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performing an intelligent network design process to produce a first WLS network design; determining that an uplink demodulation performance limiting factor affects the first WLS network design; and in response to determining that an uplink demodulation performance limiting factor affects the first WLS design, modifying the first WLS design by performing of the following to produce an updated sparse WLS design; (a) determining whether communications system demodulation data is enabled in the WCS, and if so enabling a WLS demodulated data feature; (b) if communications system demodulation data is not enabled in the WCS, and if an Abis monitoring system (AMS) is not deployed in the WCS, then enabling a mid-amble only correction feature in the WLS; (c) if communications system demodulation data is not enabled in the WCS, and if an Abis monitoring system (AMS) is deployed in the WCS, then enabling an AMS-derived demodulated data feature in the WLS; and performing another iteration of the intelligent network design process with updated design specifications and determining whether another performance limiting factor affects the updated sparse WLS design. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer readable medium comprising computer readable instructions for carrying out a prescribed method for designing a sparse wireless location system (WLS), said prescribed method comprising:
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performing an intelligent network design process to produce a first WLS network design; determining that an uplink demodulation performance limiting factor affects the first WLS network design; and in response to determining that an uplink demodulation performance limiting factor affects the first WLS design, modifying the first WLS design by performing the following to produce an updated sparse WLS design; determining whether communications system demodulation data is enabled in the WCS, and if so enabling a WLS demodulated data feature; if communications system demodulation data is not enabled in the WCS, and if an Abis monitoring system (AMS) is not deployed in the WCS, then enabling a mid-amble only correction feature in the WLS; if communications system demodulation data is not enabled in the WCS, and if an AMS is deployed in the WCS, then enabling an AMS-derived demodulated data feature in the WLS; and performing another iteration of the intelligent network design process with updated design specifications and determining whether another performance limiting factor affects the updated sparse WLS network design. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification