Method and device for generating synchronization signal in wireless access system supporting ultrahigh frequency band

Patent metadata

Field	Value
Publication number	US-9537649-B2
Application number	US-201314440053-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Nov 5, 2012
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

The present invention relates to a method for newly defining a synchronization signal to be used in an ultrahigh frequency band and acquiring downlink synchronization by using the synchronization signal, and a device for supporting the same. A method by which an eNode B (eNB) transmits a synchronization signal for compensating for a carrier frequency offset in a wireless access system supporting an ultrahigh frequency band, according to one embodiment of the present invention, can comprise the steps of: generating a first repetitive synchronization signal having a first repetitive characteristic; generating a second repetitive synchronization signal having a second repetitive characteristic; and transmitting the first repetitive synchronization signal and the second repetitive synchronization signal in the same subframe.

First claim

The invention claimed is:

1. A method for transmitting a synchronization signal to correct a Carrier Frequency Offset (CFO) by a Base Station (BS) in a wireless access system supporting a high frequency band, the method comprising:
generating a first repetitive synchronization signal having a first repetitive characteristic;
generating a second repetitive synchronization signal having a second repetitive characteristic; and
transmitting the first and second repetitive synchronization signals in the same subframe,
wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

2. The method according to claim 1 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

3. The method according to claim 1 , further comprising transmitting a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

4. The method according to claim 3 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

5. A Base Station (BS) for transmitting a synchronization signal to correct a Carrier Frequency Offset (CFO) in a wireless access system supporting a high frequency band, the BS comprising:
a transmitter; and
a processor configured to generate a repetitive synchronization signal,
wherein the processor is configured to generate a first repetitive synchronization signal having a first repetitive characteristic, generate a second repetitive synchronization signal having a second repetitive characteristic, and control the transmitter to transmit the first and second repetitive synchronization signals in the same subframe,
wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

6. The BS according to claim 5 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

7. The BS according to claim 5 , wherein the processor controls the transmitter to transmit a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

8. The BS according to claim 7 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

9. A method for receiving a synchronization signal to correct a Carrier Frequency Offset (CFO) by a user equipment (UE) in a wireless access system supporting a high frequency band, the method comprising:
receiving a first repetitive synchronization signal having a first repetitive characteristic; and
receiving a second repetitive synchronization signal having a second repetitive characteristic;
wherein the first and second repetitive synchronization signals are received in the same subframe, and
wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

10. The method according to claim 9 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

11. The method according to claim 9 , further comprising receiving a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

12. The method according to claim 11 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

13. A user equipment (UE) for receiving a synchronization signal to correct a Carrier Frequency Offset (CFO) by a Base Station (BS) in a wireless access system supporting a high frequency band, the UE comprising:
a receiver; and
a processor configured to correct the CFO in the high frequency band,
wherein the processor controls the receiver in order to:
receive a first repetitive synchronization signal having a first repetitive characteristic; and
receive a second repetitive synchronization signal having a second repetitive characteristic;
wherein the first and second repetitive synchronization signals are received in the same subframe, and
wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

14. The UE according to claim 13 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

15. The UE according to claim 13 , wherein the processor is further configured to receive a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

16. The UE according to claim 15 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

Assignees

• Lg Electronics Inc

Inventors

• Kim Jinmin
• Kim Kitae
• Ko Hyunsoo
• Chung Jaehoon

Classifications

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04W56/00

  Synchronisation arrangements · CPC title

• H04L27/2692

  with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver · CPC title

• H04L27/2657

  Carrier synchronisation · CPC title

• H04W56/001

  Synchronization between nodes · CPC title