ENHANCED MEASUREMENTS IN A WIRELESS COMMUNICATION SYSTEM

• US 20170094543A1
• Filed: 10/15/2015
• Published: 03/30/2017
• Est. Priority Date: 09/25/2015
• Status: Active Grant

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Narasimha, Murali, Nory, Ravikiran
• Granted Patent: US 10,390,245 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04B 17/373 Predicting channel quality or other radio frequency [RF] parameters
• CPC Class Codes: H04B 17/382 for resource allocation, admission control or handover
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Apparatuses, methods, and systems are disclosed for enhanced measurements. One method includes performing, by use of a processor, a first measurement at a first time. The method includes determining an offset time selected pseudo-randomly from a set of values. The method includes performing a second measurement at a second time, the second time being the offset time after the first time. The second measurement is used for a carrier loading measurement.

Claims

1. A method comprising:

performing, by use of a processor, a first measurement at a first time;

determining an offset time selected pseudo-randomly from a set of values; and

performing a second measurement at a second time, the second time being the offset time after the first time, wherein the second measurement is used for a carrier loading measurement.

2. The method of claim 1, wherein determining the offset time selected pseudo-randomly from the set of values comprises determining the offset time based on at least one of a subframe index, a system frame number, a cell radio network temporary identifier (“

C-RNTI”

), a physical cell id, a virtual cell id, and a scrambling sequence initialization value.

3. The method of claim 1, wherein determining the offset time selected pseudo-randomly from the set of values comprises determining the offset time based on a modulo function with at least one of the following inputs:

a subframe index, a system frame number, a cell radio network temporary identifier (“

C-RNTI”

), a physical cell id, a virtual cell id, and a scrambling sequence initialization value.

4. The method of claim 1, wherein determining the offset time selected pseudo-randomly from the set of values comprises selecting a value from the set of values based on a random number generator function of the processor.

5. The method of claim 1, comprising determining whether the first measurement in the first set of subframes is below a threshold, wherein determining the offset time comprises:

determining the offset time based on a first pseudo random function if the first measurement is below the threshold; and

determining the offset time based on a second pseudo random function if the first measurement is not below the threshold.

6. The method of claim 1, comprising determining whether the first measurement in the first set of subframes is below a threshold, wherein determining the offset time comprises:

determining the offset time based on a first pseudo random function if the first measurement is below the threshold; and

setting the offset time to a fixed predetermined value if the first measurement is not below the threshold.

7. The method of claim 1, wherein performing the first measurement at the first time comprises performing the first measurement in a first set of subframes and performing the second measurement at the second time comprises performing the second measurement in a second set of subframes.

8. The method of claim 7, wherein determining the carrier to be used comprises reporting the carrier loading measurement to a device, and receiving an indication from the device of which carrier to use.

9. An apparatus comprising:

a receiver that receives information;

a processor that;

performs a first measurement in a first set of subframes received by the receiver at a first time, wherein the first set of subframes comprises at least one subframe; and

performs a second measurement in a second set of subframes received by the receiver at a second time, wherein the second set of subframes comprises at least one subframe;

wherein the second set of subframes is offset in time from the first set of subframes by an offset time, the offset time being determined using a pseudo-random function.

10. The apparatus of claim 9, wherein the pseudo-random function determines the offset time based on at least one of a subframe index, a system frame number, a cell radio network temporary identifier (“

C-RNTI”

), a physical cell id, a virtual cell id, and a scrambling sequence initialization value.

11. The apparatus of claim 9, wherein the first measurement is a reference signal received power (“

RSRP”

) measurement and the second measurement is a carrier loading measurement.

12. The apparatus of claim 9, wherein the first measurement occurs in a discovery signal measurement timing configuration (“

DMTC”

) time window and the second measurement occurs outside of a DMTC time window.

13. The apparatus of claim 9, wherein the processor determines a carrier to be used.

14. The apparatus of claim 13, wherein the processor determines the carrier to be used by reporting the carrier loading measurement to a device, and receiving an indication from the device of which carrier to use.

15. The apparatus of claim 13, wherein the processor determines the carrier to be used by selecting a carrier based on the carrier loading measurement.

16. An apparatus comprising:

a receiver that receives information corresponding to load measurements made by a device, wherein the load measurements comprise;

a first measurement in a first set of subframes at a first time, wherein the first set of subframes comprises at least one subframe; and

a second measurement in a second set of subframes at a second time, wherein the second set of subframes comprises at least one subframe;

wherein the second set of subframes is offset in time from the first set of subframes by an offset time, the offset time being determined using a pseudo-random function; and

a processor that determines carriers to be used based on the information.

17. The apparatus of claim 16, wherein the first measurement is a reference signal received power (“

RSRP”

) measurement and the second measurement is a carrier loading measurement.

18. The apparatus of claim 16, wherein the first measurement occurs in a discover signal measurement timing configuration (“

DMTC”

) time window and the second measurement occurs outside of a DMTC time window.

19. A method comprising:

receiving, by use of a receiver, information corresponding to load measurements made by a device, wherein the load measurements comprise;

a first measurement in a first set of subframes at a first time, wherein the first set of subframes comprises at least one subframe; and

a second measurement in a second set of subframes at a second time, wherein the second set of subframes comprises at least one subframe;

wherein the second set of subframes is offset in time from the first set of subframes by an offset time, the offset time being determined using a pseudo-random function; and

determining carriers to be used based on the information.

20. The method of claim 19, wherein the first measurement is a reference signal received power (“

RSRP”

) measurement and the second measurement is a carrier loading measurement.

21. The method of claim 19, wherein the first measurement occurs in a discovery signal measurement timing configuration (“

DMTC”

) time window and the second measurement occurs outside of a DMTC time window.

22. A method comprising:

receiving, by use of a receiver, a discover signal measurement timing configuration (“

DMTC”

) from higher layer signaling;

determining a set of periodic DMTC time windows from the received DMTC, wherein each periodic DMTC time window of the set of periodic DMTC time windows comprises a set of contiguous subframes;

determining a set of carrier loading measurement time windows, wherein each carrier loading measurement time window of the set of carrier loading measurement time windows comprises a set of contiguous subframes; and

measuring carrier loading in at least one subframe in each carrier loading measurement time window of the set of carrier loading measurement time windows;

wherein each carrier loading measurement time window of the set of the carrier loading measurement time windows occur immediately adjacent in time to a respective periodic DMTC time window of the set of periodic DMTC time windows and each carrier loading measurement time window does not overlap its respective periodic DMTC time window.

23. The method of claim 22, comprising measuring at least one of reference signal received power (“

RSRP”

) and reference signal received quality (“

RSRQ”

) in at least one subframe of each periodic DMTC time window of the set of periodic DMTC time windows.

24. The method of claim 22, wherein each carrier loading measurement time window of the set of carrier loading measurement time windows is a periodic carrier loading measurement time window.

25. The method of claim 22, wherein a carrier loading measurement time window periodicity is a multiple of a DMTC time window periodicity.