Inter-Frequency Positioning Measurements
First Claim
1. A method of enabling inter-frequency reference signal time difference measurements on reference signals, comprising:
- generating, by a network node for a network device, an inter-frequency neighbor list of neighbor cells intended to be measured, each neighbor cell whose information is included in the inter-frequency neighbor list satisfying,an alignment condition according to which subframes of a first signal having a first frequency transmitted via a reference cell are at least one of (a) synchronized with,(b) have a known offset relative to or (c) have a random offset smaller than one half of a subframe relative to corresponding subframes of a second signal having a second frequency transmitted via the each neighbor cell, anda sufficient measurement time which is determined by an overlap of measurement gaps and positioning subframes in the second signal, andtransmitting the inter-frequency neighbor list to the user equipment.
6 Assignments
0 Petitions
Accused Products
Abstract
A networks node generates an inter-frequency neighbor list of neighbor cells intended to be measured including neighbor cells satisfying an alignment condition and a sufficient measurement time. The alignment condition is satisfied when subframes of a first signal having a first frequency transmitted via a reference cell associated with the user equipment are synchronized with, have a known offset relative to or have a random offset smaller than one half of a sub frame relative to corresponding subframes of a second signal having a second frequency transmitted via a neighboring cells. The sufficient measurement time is determined by an overlap of measurement gaps and positioning subframes in the second signal. The user equipment performs the inter-frequency Reference Signal Time Difference (RSTD) measurements during measurement gaps.
-
Citations
36 Claims
-
1. A method of enabling inter-frequency reference signal time difference measurements on reference signals, comprising:
-
generating, by a network node for a network device, an inter-frequency neighbor list of neighbor cells intended to be measured, each neighbor cell whose information is included in the inter-frequency neighbor list satisfying, an alignment condition according to which subframes of a first signal having a first frequency transmitted via a reference cell are at least one of (a) synchronized with,(b) have a known offset relative to or (c) have a random offset smaller than one half of a subframe relative to corresponding subframes of a second signal having a second frequency transmitted via the each neighbor cell, and a sufficient measurement time which is determined by an overlap of measurement gaps and positioning subframes in the second signal, and transmitting the inter-frequency neighbor list to the user equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A network node, comprising:
-
an interface configured to communicate with a user equipment via cells; a processing unit connected to the interface, and configured to control the interface to transmit towards the user equipment via a reference cell, an inter-frequency neighbor list which includes information about neighbor cells, each one of said neighbor cells in said list satisfying, an alignment condition according to which subframes of a first signal having a first frequency transmitted via the reference cell associated with the user equipment are at least one of (a) synchronized with, (b) have a known offset relative to, or (c) have a random offset smaller than one half of a subframe relative to corresponding subframes of a second signal having a second frequency transmitted via the each one of the neighboring cells, and a sufficient measurement time which is determined by an overlap of measurement gaps and positioning subframes in the second signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A method of performing inter-frequency reference signal time difference measurements by a user equipment, comprising:
-
receiving a first signal having a first frequency via a reference cell associated with the user equipment, and a second signal having a second frequency received via a neighbor cell included in an inter-frequency neighbor list; and performing first inter-frequency reference signal time difference measurements on position reference signals of said neighbor cell during first measurement gaps that overlap with positioning subframes of the second signal, wherein the neighbor cell is included in the inter-frequency neighbor list if satisfying, an alignment condition according to which subframes of the first signal are (a) synchronized with, (b) have a known offset relative to or (c) have a random offset smaller than one half of a subframe relative to corresponding subframes of the second signal, and a sufficient measurement time which is determined by an overlap of the first measurement gaps with positioning subframes of the second signal, wherein measuring gaps occur more often than the position reference signals. - View Dependent Claims (26)
-
-
27. A user equipment, comprising:
-
an interface configured to receive a first signal having a first frequency via a reference cell and a second signal having a second frequency received via a neighbor cell included in an inter-frequency neighbor list provided by a network node; and a processing unit connected to the interface and configured to perform first inter-frequency reference signal time difference measurements on position reference signals, during first measurement gaps that overlap with positioning subframes of the second signal, wherein the neighbor cell is included in the inter-frequency neighbor list if satisfying an alignment condition according to which subframes of the first signal are (a) synchronized with, (b) have a known offset relative to or (c) have a random offset smaller than one half of a subframe relative to corresponding subframes of the second signal, and a sufficient measurement time which is determined by an overlap of the first measurement gaps with positioning subframes of the second signal, and wherein measuring gaps occur more often than the position reference signals. - View Dependent Claims (28)
-
-
29. A method of performing measurements by a user equipment, which receives a first signal having a first frequency via a reference cell, and second signals having respective second frequencies via neighbor cells, comprising:
performing inter-frequency reference signal time difference measurements on first reference signals which are transmitted more frequently than second reference signals, during measurement gaps, when subframes of the first signal and corresponding subframes of the second signal are not synchronized. - View Dependent Claims (30, 31, 32)
-
33. A user equipment, comprising:
-
an interface configured to receive a first signal having a first frequency, via a reference cell and second signals having respective second frequencies, via neighbor cells; and a processing unit connected to the interface and configured to perform inter-frequency reference signal time difference measurements on first signals which are transmitted more frequently than second reference signals, when subframes in the first signal and corresponding subframes of the second signal are not synchronized. - View Dependent Claims (34, 35)
-
-
36. A method for performing measurements in a radio communication network, comprising:
-
transmitting, by said network, positioning reference signals; and scheduling, by said network, measurements to be taken by at least one user equipment such that the measured PRS at different frequencies to be measured in different measurement gaps.
-
Specification