INTERFERENCE-REMOVED RECEPTION METHOD AND TERMINAL

• US 20150358100A1
• Filed: 01/15/2014
• Published: 12/10/2015
• Est. Priority Date: 01/18/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: JUNG, Manyoung, LEE, Sangwook, HWANG, Jinyup, YANG, Yoonoh, LIM, Suhwan
• Granted Patent: US 9,729,264 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/7107 Subtractive interference cancellation
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0048 in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder for spatial equalizer H04L25/03286
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

One embodiment of the present specification provides an interference-removed reception method. The interference-removed reception method may comprise the steps of: encoding, in a binary in a physical channel, stored information for an attacker cell which causes interference; performing a comparison between the encoded binary and a new binary in the physical channel received from the attacker cell; and if the binaries match, removing interference caused by the new binary in the physical channel received from the attacker cell by using the encoded binary, and thereby receiving a signal from a serving cell.

Claims

1. An interference-removed reception method comprising:

encoding previously stored information for an aggressor cell which causes interference into a binary on a physical channel;

performing a comparison between the encoded binary and a new binary on the physical channel received from the aggressor cell; and

if the binaries match, removing interference caused by the new binary on the physical channel received from the aggressor cell by using the encoded binary, thereby receiving a signal from a serving cell.

2. The method of claim 1,

wherein the information is system information, and

wherein the physical channel is a physical transmission channel.

3. The method of claim 2, wherein the system information is a master information block (MIB).

4. The method of claim 1, before the encoding is performed, further comprising:

acquiring information by decoding a broadcast channel from the aggressor cell; and

storing the acquired information.

5. The method of claim 1, wherein the performing of the encoding comprises:

updating a part of information included in the previously stored information; and

encoding the updated part of information into a binary on the physical channel.

6. The method of claim 5,

wherein the part of information is a system frame number (SFN) in system information, and

wherein the updating is performed in accordance with an operation in which the SFN is updated every 40 ms.

7. The method of claim 1, wherein the comparison between the binaries is a comparison between cyclic redundancy check (CRC) parts.

8. The method of claim 1, further comprising:

if the binaries do not match, performing decoding on the new binary on the physical channel received from the aggressor cell;

determining whether a CRC of information obtained by performing the decoding and a CRC of the encoded binary match each other; and

if the CRCs match each other, removing interference caused by the new binary on the physical channel received from the aggressor cell by using the encoded binary, thereby receiving a signal from the serving cell.

9. The method of claim 8, further comprising, before determining whether the CRCs match, determining whether there is a CRC error as a result of performing the decoding.

10. The method of claim 8, further comprising:

if the CRCs do not match each other, storing information obtained as a result of performing the decoding;

encoding the stored information into a binary on the physical channel; and

removing interference caused by the new binary on the physical channel received from the aggressor cell by using the encoded binary, thereby receiving a signal from the serving cell.

11. An interference-removed reception terminal comprising:

a radio frequency (RF) unit; and

a processor controlling the RF unit,

wherein the processor encodes previously stored information for an aggressor cell which causes interference into a binary on a physical channel, thereafter performs a comparison between the encoded binary and a new binary on the physical channel received from the aggressor cell, and if the binaries match, removes interference caused by the new binary on the physical channel received from the aggressor cell by using the encoded binary, thereby receiving a signal from a serving cell.

12. The terminal of claim 11,

wherein the information is system information, and

wherein the physical channel is a physical transmission channel.

13. The terminal of claim 12, wherein the system information is a master information block (MIB).

14. The terminal of claim 11, wherein in order to perform the encoding, the processor updates a part of information included in the previously stored information, and encodes the updated part of information into a binary on the physical channel.

15. The terminal of claim 14,

wherein the part of information is a system frame number (SFN) in system information, and

wherein the updating is performed in accordance with an operation in which the SFN is updated every 40 ms.