Reporting bandwidth measurements by a wireless device for cell reselection

• US 10,021,584 B2
• Filed: 11/19/2013
• Issued: 07/10/2018
• Est. Priority Date: 11/19/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sunghoon, Lee, Youngdae, Park, Sungjun, Yi, Seungjune, Lee, Jaewook
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Belur, Deepa
• Application Number:
  US14/443,585
• Publication Number:
  US 20150289156A1
• Time in Patent Office: 1,694 Days
• Field of Search: None
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

A method of sending a handover failure report in a wireless communication system is provided. The method is performed by user equipment (UE) and can include detecting a handover failure, and sending, to a base station (BS), the handover failure report including a first Reference Signal Received Quality (RSRQ) measurement result for a first cell and a first wideband indicator for the first RSRQ measurement result after the handover failure is detected, wherein the first RSRQ measurement result is a result of performing RSRQ measurement, and the first wideband indicator indicates whether a wide bandwidth is used when performing RSRQ measurement.

Claims

1. A method of sending user equipment (UE) information during a Minimization of Drive-Tests (MDT) procedure in a wireless communication system, the method performed by a UE and comprising:

detecting a Radio Link Failure (RLF);

entering a radio resource control (RRC) idle state after the RLF is detected;

logging measurement information during the RRC idle state; and

sending the UE information, which includes a report for the RLF and the logged measurement information, to a base station (BS) after a transition from the RRC idle state to an RRC connection state,

wherein the report for the RLF includes a result of first Reference Signal Received Quality (RSRQ) measurement and a first wideband indicator for the first RSRQ measurement,

wherein the result of the first RSRQ measurement is a RSRQ measurement result for a cell at which the RLF is detected,

wherein the first wideband indicator indicates whether a wide bandwidth is used when performing the first RSRQ measurement,

wherein the logged measurement information includes a result of second RSRQ measurement and a second wideband indicator for the second RSRQ measurement,

wherein the result of the second RSRQ measurement is a RSRQ measurement result for a cell at which the measurement information is logged during the RRC idle state, and

wherein the second wideband indicator indicates whether a wide bandwidth is used when performing the second RSRQ measurement.

2. The method of claim 1,

wherein if a measurement bandwidth for the first RSRQ measurement is greater than a specific threshold bandwidth, the first wideband indicator indicates that the wide bandwidth is used when performing the first RSRQ measurement, and

if the first measurement bandwidth for the first RSRQ measurement is smaller than the specific threshold bandwidth, the first wideband indicator indicates that a non-wide bandwidth is used when performing the first RSRQ measurement.

3. The method of claim 2, wherein the specific threshold bandwidth comprises a bandwidth corresponding to six resource blocks.

4. The method of claim 1, wherein the UE sends the UE information to the BS when the UE information is requested by the BS.

5. A user equipment (UE) comprising:

a radio frequency (RF) unit that sends and receives radio signals; and

a processor that is functionally coupled to the RF unit,

wherein the processor;

detects a Radio Link Failure (RLF),

enters a radio resource control (RRC) idle state after the RLF is detected;

logs measurement information during the RRC idle state; and

controls the RF unit to send the UE information, which includes a report for the RLF and the logged measurement information, to a base station (BS) after a transition from the RRC idle state to an RRC connection state,

wherein the report for the RLF includes a result of first Reference Signal Received Quality (RSRQ) measurement and a first wideband indicator for the first RSRQ measurement,

wherein the result of the first RSRQ measurement is a RSRQ measurement result for a cell at which the RLF is detected,

wherein the first wideband indicator indicates whether a wide bandwidth is used when performing the first RSRQ measurement,

wherein the logged measurement information includes a result of the second RSRQ measurement and a second wideband indicator for the second RSRQ measurement,

wherein the result of the second RSRQ measurement is a RSRQ measurement result for a cell at which the measurement information is logged during the RRC idle state, and

wherein the second wideband indicator indicates whether a wide bandwidth is used when performing the second RSRQ measurement.

6. The UE of claim 5, wherein if a measurement bandwidth for the first RSRQ measurement is greater than a specific threshold bandwidth, the first wideband indicator indicates that the wide bandwidth is used when performing the first RSRQ measurement, and

if the first measurement bandwidth for the first RSRQ measurement is smaller than the specific threshold bandwidth, the first wideband indicator indicates that a non-wide bandwidth is used when performing the first RSRQ measurement.

7. The UE of claim 6, wherein the specific threshold bandwidth comprises a bandwidth corresponding to six resource blocks.

8. The UE of claim 5, wherein the UE sends the UE information to the BS when the UE information is requested by the BS.