Method and apparatus for measurement reporting and event-triggered periodic measurement reporting in an evolved universal terrestrial radio access network

Patent metadata

Field	Value
Publication number	US-10070332-B2
Application number	US-14356308-A
Country	US
Kind code	B2
Filing date	Jun 20, 2008
Priority date	Jun 21, 2007
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A method and apparatus for measurement reporting and event-triggered periodic measurement reporting in an evolved universal terrestrial radio access network (E-UTRAN) are disclosed. A wireless transmit/receive unit (WTRU) monitors cell-specific reference signals from a serving cell and neighbor cells to detect a reporting event defined for the E-UTRAN. Once a reporting event is detected, the WTRU sends a measurement report to the network. The measurement quantity may be a reference signal received quality (RSRQ). After detection of the reporting event, the WTRU may send event-triggered measurement reports periodically. The WTRU may send a scheduling request to the network for the event-triggered periodic measurement reports. The WTRU may send a termination indication if the event-triggered periodic measurement reports are terminated before a configured number of times. The WTRU may send an extension request if a specified number of periodic reporting has been sent but more reports still need to be sent.

First claim

What is claimed is:

1. A method for measurement reporting implemented in a wireless transmit receive unit (WTRU), the method comprising:
receiving, by the WTRU, a reporting event configuration from an evolved-universal terrestrial radio access network (E-UTRAN), the reporting event configuration including information associated with: (1) a plurality of events, the plurality of events including any of: a first event corresponding to a first measurement quantity associated with a serving cell exceeding a first threshold, a second event corresponding to a second measurement quantity associated with a neighbor cell exceeding a third measurement quantity on the serving cell by a predefined margin, a third event corresponding to a fourth measurement quantity associated with the neighbor cell exceeding a second threshold, a fourth event corresponding to a fifth measurement quantity associated with the serving cell not exceeding a third threshold, and a fifth event corresponding to a sixth measurement quantity associated with the serving cell not exceeding a fourth threshold and a seventh measurement quantity associated with the neighbor cell exceeding a fifth threshold, (2) reporting interval information, and (3) for each of the plurality of events, a number of times a measurement report is to be transmitted;
detecting, by the WTRU, a reporting event that corresponds to any of the first, second, third, fourth, or fifth events;
determining, by the WTRU, for the detected reporting event, the number of times the measurement report is to be transmitted; and
on condition that the detected reporting event corresponds to any of the first, second, third, fourth, or fifth events, transmitting, by the WTRU to the E-UTRAN, the measurement report the determined number of times according to the detected reporting event,
wherein the measurement report is periodically transmitted.

2. The method of claim 1 , wherein any of the first and third thresholds is an absolute threshold.

3. The method of claim 1 , wherein the reporting interval information indicates a time period between consecutive transmissions of the measurement report.

4. The method of claim 1 , wherein any of the first, second, third, fourth, fifth, sixth, or seventh measurement quantities are a reference signal received quality (RSRQ).

5. The method of claim 1 , wherein the reporting event configuration includes information indicating a hysteresis for triggering the measurement report.

6. The method of claim 1 , wherein the reporting event configuration includes information indicating a timer for triggering the measurement report.

7. The method of claim 1 , wherein the measurement report includes information indicating reference signal received quality (RSRQ) measurements associated with an unused frequency band of a measurement cell set and a total received wideband power of all radio frequency sources associated with the unused frequency band.

8. The method of claim 7 , wherein the measurement report includes information indicating a quality of the unused frequency band indicating a summation of the RSRQ measurements associated with the measurement cell set.

9. The method of claim 1 , further comprising:
transmitting a scheduling request for periodic transmission of the measurement report;
receiving a resource allocation after transmitting the scheduling request; and
transmitting the measurement report periodically using the received resource allocation.

10. The method of claim 1 , further comprising:
transmitting the measurement report periodically in accordance with the reporting interval and the number of times indicated in the reporting event configuration.

11. The method of claim 1 , further comprising, on condition that the measurement report is transmitted more or less than the determined number of times the measurement report is to be transmitted according the detected reporting event, transmitting a termination indication.

12. A wireless transmit receive unit (WTRU) configured to perform measurement reporting, the WTRU comprising:
a transceiver configured to receive a reporting event configuration from an evolved-universal terrestrial radio access network (E-UTRAN), the reporting event configuration including information associated with: (1) a plurality of events, the plurality of events including any of: a first event corresponding to a first measurement quantity associated with a serving cell exceeding a first threshold, a second event corresponding to a second measurement quantity associated with a neighbor cell exceeding a third measurement quantity associated with the serving cell by a predefined margin, a third event corresponding to a fourth measurement quantity associated with the neighbor cell exceeding a second threshold, a fourth event corresponding to a fifth measurement quantity associated with the serving cell not exceeding a third threshold, and a fifth event corresponding to a sixth measurement quantity associated with the serving cell not exceeding a fourth threshold and a seventh measurement quantity associated with the neighbor cell exceeding a fifth threshold, (2) a reporting interval, and (3) for each of the plurality of events, a number of times a measurement report is to be transmitted;
a controller configured to:
detect a reporting event that corresponds to any of the first, second, third, fourth, or fifth events; and
determine, for the detected reporting event, the number of times the measurement report is to be transmitted;

wherein the transceiver is further configured to:
on condition that the detected reporting event corresponds to any of the first, second, third, fourth, or fifth events, transmit, to the E-UTRAN, the measurement report the determined number of times according to the detected reporting event, and

wherein the measurement report is periodically transmitted.

13. The WTRU of claim 12 , wherein any of the first and third thresholds is an absolute threshold.

14. The WTRU of claim 12 , wherein the reporting interval information indicates a time period between consecutive transmissions of the measurement report.

15. The WTRU of claim 12 , wherein any of the first, second, third, fourth, fifth, sixth, or seventh measurement quantities are a reference signal received quality (RSRQ).

16. The WTRU of claim 12 , wherein the reporting event configuration includes information indicating a hysteresis for triggering the measurement report.

17. The WTRU of claim 12 , wherein the reporting event configuration includes information indicating a timer for triggering the measurement report.

18. The WTRU of claim 12 wherein the controller configures the measurement report to include reference signal received quality (RSRQ) measurements associated with an unused frequency band of a measurement cell set and a total received wideband power from all radio frequency sources associated with the unused frequency band.

19. The WTRU of claim 18 , wherein the controller is configured to include, in the measurement report, information indicating a quality of the unused frequency band indicating a summation of the RSRQ measurements associated with the measurement cell set.

20. The WTRU of claim 12 , wherein the transceiver is further configured to:
transmit a scheduling request for periodic transmission of the measurement report;
receive a resource allocation after transmitting the scheduling request; and
transmit the measurement report periodically using the received resource allocation.

21. The WTRU of claim 12 , wh

Assignees

• Wang Jin
• Wang Peter S
• Interdigital Tech Corp

Inventors

• Wang Jin
• Wang Peter S

Classifications

• H04W36/0085

  Hand-off measurements · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/54

  based on quality criteria · CPC title

• H04W36/0058 Primary

  Transmission of hand-off measurement information, e.g. measurement reports · CPC title

• H04W36/20

  for optimising the interference level · CPC title