Apparatus and method for positioning a wireless user equipment
First Claim
Patent Images
1. A method, comprising:
- receiving at a mobile user equipment a reference signal from each of at least two target neighbor cells via at least one receiving branch;
estimating at the mobile user equipment a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell;
computing at the mobile user equipment a reference signal time difference for the received reference signal from the target neighbor cell; and
screening at the mobile user equipment the computed reference signal time difference using the estimated timing rang;
wherein estimating the timing range further comprises at least one ofsetting a lower bound of the timing range to (d−
ta); and
setting an upper bound of the timing range to (d+ta), wherein d is the inter-cell distance between the serving cell and the target neighbor cell and ta is the timing advance.
6 Assignments
0 Petitions
Accused Products
Abstract
In accordance with an example embodiment of the present invention, a method is disclosed that comprises receiving a reference signal from each of at least two target neighbor cells via at least one receiving branch at a user equipment; estimating a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell; computing a reference signal time difference for the received reference signal from the target neighbor cell; and screening the computed reference signal time difference using the estimated timing range.
16 Citations
15 Claims
-
1. A method, comprising:
-
receiving at a mobile user equipment a reference signal from each of at least two target neighbor cells via at least one receiving branch; estimating at the mobile user equipment a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell; computing at the mobile user equipment a reference signal time difference for the received reference signal from the target neighbor cell; and screening at the mobile user equipment the computed reference signal time difference using the estimated timing rang; wherein estimating the timing range further comprises at least one of setting a lower bound of the timing range to (d−
ta); andsetting an upper bound of the timing range to (d+ta), wherein d is the inter-cell distance between the serving cell and the target neighbor cell and ta is the timing advance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus, comprising:
-
at least one data processor; at least one memory including computer program code executable by the at least one data processor; a radio interface module configured to receive a reference signal from each of at least two target neighbor cells via at least one receiving branch at the apparatus, where the apparatus is comprised of a mobile user equipment; said at least one data processor configured with said memory including computer program code to estimate a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell; compute a reference signal time difference for the received reference signal received from the target neighbor cell; and screen the computed reference signal time difference using the estimated timing range, wherein said at least one data processor is further configured with said memory including computer program code to adjust the timing range by narrowing down the timing range based at least on historical data of reference signal time differences. - View Dependent Claims (10, 11, 12, 13, 15)
-
-
14. An apparatus, comprising:
-
at least one data processor; at least one memory including computer program code executable by the at least one data processor; a radio interface module configured to receive a reference signal from each of at least two target neighbor cells via at least one receiving branch at the apparatus, where the apparatus is comprised of a mobile user equipment; said at least one data processor configured with said memory including computer program code to estimate a timing range based at least on one of a timing advance for a serving cell and an inter-cell distance between the target neighbor cell and the serving cell; compute a reference signal time difference for the received reference signal received from the target neighbor cell; and screen the computed reference signal time difference using the estimated timing range, wherein said at least one data processor is further configured with said memory including computer program code to estimate a location of the apparatus within the serving cell based at least on one of a direction of the received reference signal and a previous known position of the apparatus, wherein said at least one data processor is further configured with said memory including computer program code to perform at least one of identifying the at least two target neighbor cells based at least on one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a received power spectral density of the total noise and interference, and a received energy per resource element so that the at least two target neighbor cells are the strongest among all neighbor cells and directly face the apparatus; and receiving a signaling message from one of the serving cell and a serving mobile location center indicating the two target neighbor cells are strongest among all the neighboring cells and proximately face the apparatus.
-
Specification