Method and apparatus for transmitting and receiving different signal types in communication systems

• US 8,619,748 B2
• Filed: 03/06/2012
• Issued: 12/31/2013
• Est. Priority Date: 07/30/2007
• Status: Active Grant

• Current Assignee: Unwired Planet International Limited (Brevet Capital)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Papasakellariou, Aris, Cho, Joon-Young
• Primary Examiner(s): Jung, Min
• Application Number:
  US13/413,274
• Publication Number:
  US 20120163365A1
• Time in Patent Office: 665 Days
• Field of Search: None
• US Class Current: 370/344
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/026 using code division
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method and apparatus for multiplexing a reference signal from a User Equipment (UE), not having any other signal transmission in the respective Transmission Time Interval (TTI), with a reference signal from another UE also having data transmission in the respective TTI, or with the control signal and reference signal from another UE transmitted in the respective TTI. The multiplexed reference signal from the UE not having any other signal transmission in the respective TTI can serve as a sounding reference signal to enable the serving base station to apply link adaptation to a subsequent signal transmitted by the UE or it can serve as a reference signal conveying state information, such as resource request or service request.

Claims

1. A method for transmitting a Reference Signal (RS) of a User Equipment (UE) in a wireless communication system, the method comprising:

transmitting a Sounding Reference Signal (SRS) during one symbol in a sub-frame;

transmitting a DeModulation (DM) RS during one symbol of each slot in another sub-frame; and

transmitting an information signal during other symbols of each slot in the another sub-frame over a same bandwidth as the DM RS.

2. The method as claimed in claim 1, wherein the SRS is transmitted during a last symbol in each of a predetermined number of sub-frames.

3. The method as claimed in claim 1, wherein the DM RS is transmitted during a middle symbol of each slot in the another sub-frame.

4. The method as claimed in claim 1, wherein the DM RS is an RS for a Physical Uplink Shared CHannel (PUSCH).

5. The method as claimed in claim 1, wherein a cyclic shift for the SRS is different from a cyclic shift for the DM RS.

6. A method for receiving a Reference Signal (RS) of a Node B in a wireless communication system, the method comprising:

receiving a Sounding Reference Signal (SRS) during one symbol in a sub-frame;

receiving a DeModulation (DM) RS during one symbol of each slot in another sub-frame; and

receiving an information signal during other symbols of each slot in the another sub-frame over a same bandwidth as the DM RS.

7. The method as claimed in claim 6, wherein the SRS is received during a last symbol in each of a predetermined number of sub-frames.

8. The method as claimed in claim 6, wherein the DM RS is received during a middle symbol of each slot of the another sub-frame.

9. The method as claimed in claim 6, wherein the DM RS is an RS for a Physical Uplink Shared Channel (PUSCH).

10. The method as claimed in claim 6, wherein a cyclic shift for the SRS is different from a cyclic shift for the DM RS.

11. A User Equipment (UE) apparatus for transmitting a Reference Signal (RS) in a wireless communication system, the UE apparatus comprising:

a controller; and

a transmitter for transmitting a Sounding Reference Signal (SRS) during one symbol in a sub-frame, for transmitting a DeModulation (DM) RS during one symbol of each slot in another sub-frame, and for transmitting an information signal during other symbols of each slot in the another sub-frame over a same bandwidth as the DM RS.

12. The UE apparatus as claimed in claim 11, wherein the transmitter transmits the SRS during a last symbol in each of a predetermined number of sub-frames.

13. The UE apparatus as claimed in claim 11, wherein the transmitter transmits the DM RS during a middle symbol of each slot of the another sub-frame.

14. The UE apparatus as claimed in claim 11, wherein the DM RS is an RS for a Physical Uplink Shared CHannel (PUSCH).

15. The UE apparatus as claimed in claim 11, wherein a cyclic shift for the SRS is different from a cyclic shift for the DM RS.

16. A Node B apparatus for receiving a Reference Signal (RS) in a wireless communication system, the Node B apparatus comprising:

a controller; and

a receiver for receiving a Sounding Reference Signal (SRS) during one symbol in a sub-frame, for receiving a DeModulation (DM) RS during one symbol of each slot in another sub-frame, and for receiving an information signal during other symbols of each slot in the another sub-frame over a same bandwidth as the DM RS.

17. The Node B apparatus as claimed in claim 16, wherein the SRS is received during a last symbol in each of a predetermined number of sub-frames.

18. The Node B apparatus as claimed in claim 16, wherein the DM RS is received during a middle symbol of each slot in the another sub-frame.

19. The Node B apparatus as claimed in claim 16, wherein the DM RS is an RS for a Physical Uplink Shared CHannel (PUSCH).

20. The Node B apparatus as claimed in claim 16, wherein a cyclic shift for the SRS is different from a cyclic shift for the DM RS.