SFN indication method, terminal device, and positioning server and system
First Claim
1. A positioning server, comprising:
- at least one processor; and
memory coupled to the at least one processor, the memory comprising instructions that, when executed by the at least one processor, cause the positioning server to perform operations including;
obtaining an system frame number (SFN) initialization moment of a cell i from the cell i, and an SFN initialization moment of a cell j from the cell j;
generating an SFN offset indication parameter of the cell i based on the SFN initialization moment of the cell i and the SFN initialization moment of the cell j by using the following formula;
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Accused Products
Abstract
The present disclosure relates to SFN indication methods, terminal devices, and positioning servers and systems. One example method includes obtaining an SFN offset indication parameter of a cell i, sending the SFN offset indication parameter of the cell i to a terminal device, receiving the SFN offset indication parameter of the cell i from the positioning server, obtaining a frame number of a radio frame n of a cell j, and determining a phase rotation parameter of the cell i based on the frame number of the radio frame n of the cell j and the SFN offset indication parameter of the cell i, or obtaining a sequence initialization factor used by a narrowband positioning reference signal (NPRS) on a radio frame m of the cell i, and obtaining the NPRS on the radio frame m of the cell i based on the sequence initialization factor.
17 Citations
13 Claims
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1. A positioning server, comprising:
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at least one processor; and memory coupled to the at least one processor, the memory comprising instructions that, when executed by the at least one processor, cause the positioning server to perform operations including; obtaining an system frame number (SFN) initialization moment of a cell i from the cell i, and an SFN initialization moment of a cell j from the cell j; generating an SFN offset indication parameter of the cell i based on the SFN initialization moment of the cell i and the SFN initialization moment of the cell j by using the following formula; - View Dependent Claims (2, 3)
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4. A apparatus, comprising:
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at least one processor; and memory coupled to the at least one processor, the memory comprising instructions that, when executed by the at least one processor, cause the apparatus to perform operations including; receiving an SFN offset indication parameter of a cell i from a positioning server, wherein the SFN offset indication parameter indicates a relative offset between an SFN of a radio frame m of the cell i and an SFN of a radio frame n of a cell j; obtaining a frame number SFNj of the radio frame n of the cell j; and determining a phase rotation parameter of the cell i based on the frame number SFNj of the radio frame n of the cell j and the SFN offset indication parameter of the cell i;
orobtaining, based on the frame number SFNj of the radio frame n of the cell j and the SFN offset indication parameter of the cell i, a sequence initialization factor cinit used by a narrowband positioning reference signal (NPRS) on the radio frame m of the cell i, and obtaining the NPRS on the radio frame m of the cell i based on the sequence initialization factor cinit of the cell i. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A positioning system, comprising a positioning server, wherein the positioning server is configured to:
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obtain an SFN initialization moment of a cell i from the cell i, and an SFN initialization moment of a cell j from the cell j; generate an SFN offset indication parameter of the cell i based on the SFN initialization moment of the cell i and the SFN initialization moment of the cell j by using the following formula; - View Dependent Claims (12, 13)
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Specification