Method and apparatus for transmitting and receiving control information to randomize inter-cell interference in a mobile communication system

Patent metadata

Field	Value
Publication number	US-9374206-B2
Application number	US-201414263374-A
Country	US
Kind code	B2
Filing date	Apr 28, 2014
Priority date	Jan 5, 2007
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

Methods and apparatuses are provided for transmitting control information in an SC-FDMA system. A UE determines cyclic shift values for SC-FDMA symbols. The UE acquires cyclic shift sequences by the cyclic shift values. The UE applies the cyclic shift sequences to the control information on an SC-FDMA symbol basis. The control information applied with the cyclic shift sequences in the SC-FDMA symbols is transmitted to a Node B.

First claim

What is claimed is:

1. A method for transmitting control information, the method comprising:
generating, by a user equipment (UE), a cyclic shift value corresponding to a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol, where a cyclic shift value is obtained individually for each SC-FDMA symbol within a slot of a subframe;
obtaining, by the UE, a cyclically shifted sequence using the cyclic shift value corresponding to the SC-FDMA symbol;
generating, by the UE, on an SC-FDMA symbol basis, a control signal using the cyclically shifted sequence and the control information; and
transmitting, by the UE, the control signal in the SC-FDMA symbol to a Node B.

2. The method of claim 1 , wherein the cyclic shift value corresponds to a cell.

3. The method of claim 1 , wherein generating the control signal comprises changing phases of symbols carrying the control information according to phases of the cyclically shifted sequence.

4. The method of claim 1 , wherein a control signal for each of a plurality of SC-FDMA symbols is generated on an SC-FDMA symbols basis, using a cyclically shifted sequence for each of the plurality of SC-FDMA symbols and the control information, and the control signal for each of the plurality of SC-FDMA symbols is transmitted in each of the plurality of SC-FDMA symbols.

5. The method of claim 1 , wherein obtaining the cyclically shifted sequence comprises cyclically shifting a sequence by the cyclic shift value.

6. The method of claim 5 , wherein the sequence is a cell-specific Zadoff-Chu (ZC) sequence.

7. The method of claim 1 , wherein generating the control signal comprises multiplying the cyclically shifted sequence and the control information on the SC-FDMA symbol basis.

8. A method for receiving control information, the method comprising:
receiving, by a Node B, a control signal from a user equipment (UE);
determining, by the Node B, a cyclic shift value corresponding to a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol, where a cyclic shift value is obtained individually for each SC-FDMA symbol within a slot of a subframe;
obtaining, by the Node B, a cyclically shifted sequence using the cyclic shift value corresponding to the SC-FDMA symbol; and
obtaining, by the Node B, the control information using the cyclically shifted sequence and the received control signal.

9. The method of claim 8 , wherein the cyclic shift value corresponds to a cell.

10. The method of claim 8 , wherein the obtaining step comprises changing phases of symbols carrying the control information according to phases of the cyclically shifted sequence.

11. The method of claim 8 , wherein a control signal for each of a plurality of SC-FDMA symbols is generated on an SC-FDMA symbols basis, using a cyclically shifted sequence for each of the plurality of SC-FDMA symbols and the control information, and the control signal for each of the plurality of SC-FDMA symbols is received in each of the plurality of SC-FDMA symbols.

12. The method of claim 8 , wherein obtaining the cyclically shifted sequence comprises cyclically shifting a sequence by the cyclic shift value.

13. The method of claim 12 , wherein the sequence is a cell-specific Zadoff-Chu (ZC) sequence.

14. The method of claim 8 , wherein obtaining the control information comprises multiplying the cyclically shifted sequence and the received control signal on the SC-FDMA symbol basis.

15. An apparatus for transmitting control information, the apparatus comprising:
a signal generator configured to:
generate a cyclic shift value corresponding to a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol, where a cyclic shift value is obtained individually for each SC-FDMA symbol within a slot of a subframe,
obtain a cyclically shifted sequence using the cyclic shift value corresponding to the SC-FDMA symbol, and
generate, on an SC-FDMA symbol basis, a control signal using the cyclically shifted sequence and the control information; and

a controller configured to control the signal generator, and transmit the control signal in the SC-FDMA symbol.

16. The apparatus of claim 15 , wherein the cyclic shift value corresponds to a cell.

17. The apparatus of claim 15 , wherein the controller is further configured to change phases of symbols carrying the control information according to phases of the cyclically shifted sequence.

18. The apparatus of claim 15 , wherein a control signal for each of a plurality of SC-FDMA symbols is generated on an SC-FDMA symbols basis, using a cyclically shifted sequence for each of the plurality of SC-FDMA symbols and the control information, and the control signal for each of the plurality of SC-FDMA symbols is transmitted in each of the plurality of SC-FDMA symbols.

19. The apparatus of claim 15 , wherein the signal generator generates the cyclically shifted sequence by cyclically shifting a sequence by the cyclic shift value.

20. The apparatus of claim 19 , wherein the sequence is a cell-specific Zadoff-Chu (ZC) sequence.

21. The apparatus of claim 15 , wherein the signal generator generates the control signal by multiplying the cyclically shifted sequence and the control information on the SC-FDMA symbol basis.

22. An apparatus for receiving control information, the apparatus comprising:
a controller configured to control a signal receiver, and receive a control signal in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol; and
the signal receiver configured to:
generate a cyclic shift value corresponding to the SC-FDMA symbol, where a cyclic shift value is obtained individually for each SC-FDMA symbol within a slot of a subframe,
obtain a cyclically shifted sequence using the cyclic shift value corresponding to the SC-FDMA symbol, and
obtain the control information using the cyclically shifted sequence and the received control signal.

23. The apparatus of claim 22 , wherein the cyclic shift value corresponds to a cell.

24. The apparatus of claim 22 , wherein the controller is further configured to change phases of symbols carrying the control information according to phases of the cyclically shifted sequence.

25. The apparatus of claim 22 , wherein a control signal for each of a plurality of SC-FDMA symbols is generated on an SC-FDMA symbols basis, using a cyclically shifted sequence for each of the plurality of SC-FDMA symbols and the control information, and the control signal for each of the plurality of SC-FDMA symbols is received in each of the plurality of SC-FDMA symbols.

26. The apparatus of claim 22 , wherein the signal receiver obtains the cyclically shifted sequence by cyclically shifting a sequence by the cyclic shift value.

27. The apparatus of claim 26 , wherein the sequence is a cell-specific Zadoff-Chu (ZC) sequence.

28. The apparatus of claim 22 , wherein the signal receiver obtains the control information by multiplying the cyclically shifted sequence and the received control signal on the SC-FDMA symbol basis.

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Kim Young-Bum
• Cho Joon-Young
• Lee Ju-Ho
• Li Ying Yang
• Zhang Yujian

Classifications

• H04W72/21

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

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0032 Primary

  Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation · CPC title

• H04L5/0016

  Time-frequency-code · CPC title