Communication device and method of controlling same

• US 10,397,813 B2
• Filed: 03/25/2016
• Issued: 08/27/2019
• Est. Priority Date: 10/20/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Lee, Hae-Chul, Kim, Min-Goo, Kim, In-Hyoung, Do, Joo-Hyun
• Primary Examiner(s): Nawaz, Asad M
• Assistant Examiner(s): Ali, Syed
• Application Number:
  US15/080,870
• Publication Number:
  US 20170111812A1
• Time in Patent Office: 1,250 Days
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic

Abstract

Apparatuses, methods, and systems of measuring received power are described, including apparatuses, methods, and systems which can measure received power, even when the subcarrier offset of the measurement bandwidth is different from the subcarrier bandwidth of the cell bandwidth. In one method, the first received power of a plurality of Resource Blocks (RBs) received from a second Base Station (BS) are measured based on first channel state information received from a first BS. Based on the determination whether a value of an index included in the first channel state information is larger than a predetermined value, at least one of second received power, third received power, and fourth received power of the plurality of RBs is measured by using second channel state information including an alternative index determined based on the first channel state information based on a result of the determination.

Claims

1. A communication device that measures a valid received power even when a subcarrier offset of a measurement bandwidth is different from a subcarrier bandwidth of a cell bandwidth, the communication device comprising:

a transceiver that receives first channel state information from a first Base Station (BS) and receives a plurality of Resource Blocks (RBs) from a second BS;

a memory that stores the first channel state information and second channel state information, the second channel state information including an alternative index determined through a modular operation based on a value of an index included in the first channel state information; and

a processor electrically connected to the transceiver and the memory,

wherein the processor;

measures a first received power of the plurality of RBs using the index included in the first channel state information,

compares the value of the index included in the first channel state information to a predetermined value,

measures another received power of the plurality of RBs from the second BS by using the alternative index included in the second channel state information, based on the comparison of the value of the index included in the first channel state information to the predetermined value, and

determines a measured received power having a highest strength as the valid received power, and

wherein the index and the alternative index include subcarrier offset (k) information on the plurality of RBs.

2. The communication device of claim 1, wherein the processor measures a second received power when the index value is larger than the predetermined value.

3. The communication device of claim 1, wherein the processor measures a third received power or a fourth received power when the index value is equal to or smaller than the predetermined value.

4. The communication device of claim 1, wherein the processor shifts sequences according to a predetermined value on the basis of a plurality of measurement RBs determined based on the first channel state information and measures a third received power by using channel state information reference signals (CSI-RSs) acquired based on the shifted sequences.

5. The communication device of claim 1, wherein the processor shifts the RBs according to a predetermined value on the basis of a plurality of measurement RBs determined based on the first channel state information and measures a fourth received power by using channel state information reference signals (CSI-RSs) acquired in the shifted RBs.

6. A method of a communication device that measures a valid received power even when a subcarrier offset of a measurement bandwidth is different from a subcarrier bandwidth of a cell bandwidth, the method comprising:

measuring a first received power of a plurality of Resource Blocks (RBs) received from a second Base Station (BS) using an index included in first channel state information received from a first BS;

comparing a value of the index included in the first channel state information to a predetermined value;

measuring another received power of the plurality of RBs from the second BS by using an alternative index included in second channel state information, based on the comparison of the value of the index to the predetermined value, wherein the alternative index included in the second channel state information is determined through a modular operation based on the value of the index included in the first channel state information; and

determining a measured received power having a highest strength as the valid received power,

wherein the index and the alternative index include subcarrier offset (k) information on the plurality of RBs.

7. The method of claim 6, wherein a second received power is measured when the value of the index is larger than the predetermined value.

8. The method of claim 6, wherein a third received power or a fourth received power is measured when the value of the index is equal to or smaller than the predetermined value.

9. The method of claim 6, wherein sequences are shifted according to a predetermined value on the basis of sequences of a plurality of measurement RBs determined based on the first channel state information and a third received power is measured using channel state information reference signals (CSI-RSs) acquired based on the shifted sequences.

10. The method of claim 6, wherein the RBs are shifted according to a predetermined value on the basis of a plurality of measurement RBs determined based on the first channel state information and a fourth received power is measured using channel state information reference signals (CSI-RSs) acquired in the shifted RBs.

11. A method of a User Equipment (UE) including a communication device that measures a valid received power even when a subcarrier offset of a measurement bandwidth is different from a subcarrier bandwidth of a cell bandwidth, the method comprising:

measuring a first received power of a plurality of Resource Blocks (RBs) received from a second Base Station (BS) using an index included in first channel state information received from a first BS;

comparing a value of the index included in the first channel state information to a predetermined value;

measuring another received power of the plurality of RBs by using an alternative index included in second channel state information, based on the comparison of the value of the index included in the first channel state information to the predetermined value, wherein the alternative index included in the second channel state information is determined through a modular operation based on the value of the index included in the first channel state information; and

determining a measured received power having a highest strength as the valid received power,

wherein the index and the alternative index include subcarrier offset (k) information on the plurality of RBs.

12. The method of claim 11, wherein a second received power is measured when the index value is larger than the predetermined value.

13. The method of claim 11, wherein a third received power or a fourth received power is measured when the value of the index is equal to or smaller than the predetermined value.

14. The method of claim 11, wherein sequences are shifted according to a predetermined value on the basis of sequences of a plurality of measurement RBs determined based on the first channel state information and a third received power is measured using channel state information reference signals (CSI-RSs) acquired based on the shifted sequences.