Cooperating Receiver Selection for UMTS Wireless Location
First Claim
1. A method of identifying a set of cooperator and demodulator signal collection receivers for use in locating a mobile device in a Code Division Multiple Access (CDMA)-based wireless communications network (WCN), comprising:
- obtaining data identifying an active set of base stations through which active communication is established between the mobile device and the WCN;
based on the active set, identifying a proxy serving cell;
based on the proxy serving cell, identifying at least one cooperator receiver and at least one demodulator receiver;
employing the at least one cooperator receiver and the at least one demodulator receiver to collect signal data from the mobile device; and
employing the signal data to locate the mobile device.
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Accused Products
Abstract
For Wireless Communications Networks (WCNs) that support soft handover, cooperator receiver selection for a TDOA, AOA, TDOA/AOA, or hybrid network-based or network-overlay Wireless Location System (WLS) must contend with one or more network base stations as a serving cell. When the active set contains more than one member, two techniques for determining a set of cooperating and demodulating receivers to use in the signal collection for location estimation is disclosed. In one embodiment, the active set members are constructively reduced to a single member that is used as a proxy serving cell. In another embodiment, the information contained in the active set membership is retained and a new set of demodulating and cooperator receivers are generated based on the entire membership of the active set.
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Citations
51 Claims
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1. A method of identifying a set of cooperator and demodulator signal collection receivers for use in locating a mobile device in a Code Division Multiple Access (CDMA)-based wireless communications network (WCN), comprising:
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obtaining data identifying an active set of base stations through which active communication is established between the mobile device and the WCN; based on the active set, identifying a proxy serving cell; based on the proxy serving cell, identifying at least one cooperator receiver and at least one demodulator receiver; employing the at least one cooperator receiver and the at least one demodulator receiver to collect signal data from the mobile device; and employing the signal data to locate the mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system configured to identify a set of cooperator and demodulator signal collection receivers for use in locating a mobile device in a Code Division Multiple Access (CDMA)-based wireless communications network (WCN), the system comprising at least one processor and at least one storage medium communicatively coupled to said at least one processor, the storage medium having stored therein computer-executable instructions for instructing the processor in causing the following steps:
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obtaining data identifying an active set of base stations through which active communication is established between the mobile device and the WCN; based on the active set, identifying a proxy serving cell; based on the proxy serving cell, identifying at least one cooperator receiver and at least one demodulator receiver; employing the at least one cooperator receiver and the at least one demodulator receiver to collect signal data from the mobile device; and employing the signal data to locate the mobile device. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A computer readable storage medium storing thereon computer executable instructions for identifying a set of cooperator and demodulator signal collection receivers for use in locating a mobile device in a Code Division Multiple Access (CDMA)-based wireless communications network (WCN), said computer executable instructions for:
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obtaining data identifying an active set of base stations through which active communication is established between the mobile device and the WCN; based on the active set, identifying a proxy serving cell; based on the proxy serving cell, identifying at least one cooperator receiver and at least one demodulator receiver; employing the at least one cooperator receiver and the at least one demodulator receiver to collect signal data from the mobile device; and employing the signal data to locate the mobile device. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification