Method and system of pedestrian localization
First Claim
1. A method of localizing a mobile device along a pedestrian route traversed in an indoor area, the mobile device including a processor and a memory, the method executed in the processor and comprising:
- localizing the mobile device to an estimated first position within the indoor area based on accessing, from a first memory tier of the memory, a first portion fingerprint data that includes fingerprint data of a first subset area of the indoor area, the first subset area at least partly surrounding the estimated first position, wherein the fingerprint data comprises a plurality of portions, each of the plurality of portions corresponding to a subset area of the indoor area, and wherein the first memory tier includes the first portion of the plurality of portions of the fingerprint data and a second memory tier of the memory includes one or more of remaining portions of the plurality of portions of the fingerprint data;
detecting a traversal of the mobile device along the route to an estimated second position within the indoor area; and
when a difference between the estimated first and second positions exceeds a threshold distance, replacing the first portion fingerprint data of the first memory tier upon pre-fetching a second portion fingerprint data from the second memory tier, the second portion fingerprint data including fingerprint data of a second subset area of the indoor area, the second subset area at least partly surrounding the estimated second position.
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Accused Products
Abstract
A method and system localizing a mobile device along a pedestrian route traversed in an indoor area, the mobile device including a processor and a memory. The method executed in the processor and comprises localizing the mobile device to an estimated first position within the indoor area based on accessing, from a first memory tier of the memory, a first portion fingerprint data that includes fingerprint data of a first subset area of the indoor area, the first subset area at least partly surrounding the estimated first position, detecting a traversal of the mobile device along the route to an estimated second position within the indoor area, and when a difference between the estimated first and second positions exceeds a threshold distance, replacing the first portion fingerprint data of the first memory tier upon pre-fetching a second portion fingerprint data, the second portion fingerprint data including fingerprint data of a second subset area of the indoor area, the second subset area at least partly surrounding the estimated second position.
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Citations
18 Claims
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1. A method of localizing a mobile device along a pedestrian route traversed in an indoor area, the mobile device including a processor and a memory, the method executed in the processor and comprising:
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localizing the mobile device to an estimated first position within the indoor area based on accessing, from a first memory tier of the memory, a first portion fingerprint data that includes fingerprint data of a first subset area of the indoor area, the first subset area at least partly surrounding the estimated first position, wherein the fingerprint data comprises a plurality of portions, each of the plurality of portions corresponding to a subset area of the indoor area, and wherein the first memory tier includes the first portion of the plurality of portions of the fingerprint data and a second memory tier of the memory includes one or more of remaining portions of the plurality of portions of the fingerprint data; detecting a traversal of the mobile device along the route to an estimated second position within the indoor area; and when a difference between the estimated first and second positions exceeds a threshold distance, replacing the first portion fingerprint data of the first memory tier upon pre-fetching a second portion fingerprint data from the second memory tier, the second portion fingerprint data including fingerprint data of a second subset area of the indoor area, the second subset area at least partly surrounding the estimated second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for localizing a mobile device within an indoor area, the system comprising:
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a processor; a memory storing a set of instructions, the instructions executable in the processor to; localize the mobile device to an estimated first position within the indoor area based on accessing, from a first memory tier of the memory, a first portion fingerprint data that includes fingerprint data of a first subset area of the indoor area, the first subset area at least partly surrounding the estimated first position, wherein the fingerprint data comprises a plurality of portions, each of the plurality of portions corresponding to a subset area of the indoor area, and wherein the first memory tier includes the first portion of the plurality of portions of the fingerprint data and a second memory tier of the memory includes one or more of remaining portions of the plurality of portions of the fingerprint data; detect a traversal of the mobile device along the route to an estimated second position within the indoor area; and when a difference between the estimated first and second positions exceeds a threshold distance, replace the first portion fingerprint data of the first memory tier upon pre-fetching a second portion fingerprint data from the second memory tier, the second portion fingerprint data including fingerprint data of a second subset area of the indoor area, the second subset area at least partly surrounding the estimated second position. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification