Apparatus and method for transmitting/receiving downlink data channel signal transmission information in cellular radio communication system using cooperative multi-point scheme

• US 9,648,605 B2
• Filed: 10/02/2015
• Issued: 05/09/2017
• Est. Priority Date: 01/11/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hyo-Jin, Kim, Youn-Sun, Kim, Ki-Il, Ji, Hyoung-Ju, Cho, Joon-Young, Lee, Ju-Ho
• Primary Examiner(s): Brandt, Christopher M
• Application Number:
  US14/873,772
• Publication Number:
  US 20160029353A1
• Time in Patent Office: 585 Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

An apparatus and a method for transmitting/receiving downlink data channel signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (CoMP) scheme are provided. In the downlink data channel signal transmission information transmission method, a Base Station (BS) transmits downlink data channel signal transmission information including information related to Resource Elements (REs) scheduled for a downlink data channel signal transmission to a User Equipment (UE), and transmits downlink data channel signal non-transmission information including information related to REs through which a downlink data channel signal is not transmitted among the REs scheduled for the downlink data channel signal transmission to the UE.

Claims

1. A method for wireless communication, the method comprising:

receiving configuration information including at least two identifications for scrambling;

receiving control information indicating a scrambling identity;

determining an identification from at least two identifications based on the scrambling identity indicated by the control information; and

identifying a reference signal based on the scrambling identity and the determined identification.

2. The method of claim 1, further comprising:

receiving data using the identified reference signal.

3. The method of claim 1, wherein the configuration information is received via a higher layer signaling.

4. The method of claim 1, wherein the control information is received via a physical downlink control channel (PDCCH).

5. The method of claim 1, wherein the determined identification of at least two identifications is indicated by the scrambling identity.

6. The method of claim 1, wherein the reference signal is identified based on the following initialization value,

c_init=(└

n_s,nSCID/2┘

+1)·

(2X_nSCID+1)·

2¹⁶+n_SCID

where n_SCID is the scrambling identity, n_s,nSCID denotes a slot number, and X_nSCID is the determined identification.

7. The method of claim 1, wherein the determining the identification comprises:

determining a value of a first parameter corresponding to the scrambling identity using a mapping table between values of the scrambling identity and values of the first parameter;

determining the identification corresponding to the value of the first parameter from among the at least two identifications; and

calculating an initialization value being used for generating the reference signal based on the value of the first parameter and the determined identification.

8. An apparatus for wireless communications, the apparatus comprising:

a receiver configured to;

receive configuration information including at least two identifications for scrambling, and

receive control information indicating a scrambling identity; and

a processor configured to;

determine an identification from at least two identifications based on the scrambling identity indicated by the control information, and

identify a reference signal based on the scrambling identity and the determined identification.

9. The apparatus of claim 8, wherein the receiver is further configured to receive data using the identified reference signal.

10. The apparatus of claim 8, wherein the configuration information is received via a higher layer signaling.

11. The apparatus of claim 8, wherein the control information is received via a physical downlink control channel (PDCCH).

12. The apparatus of claim 8, wherein the determined identification of at least two identifications is indicated by the scrambling identity.

13. The apparatus of claim 8, wherein the reference signal is identified based on the following initialization value,

c_init=(└

n_s,nSCID/2┘

+1)·

(2X_nSCID+1)·

2¹⁶+n_SCID

where n_SCID is the scrambling identity, n_s,nSCID denotes a slot number, and X_nSCID is the determined identification.

14. The apparatus of claim 8, wherein the processor is further configured to:

determine a value of a first parameter corresponding to the scrambling identity using a mapping table between values of the scrambling identity and values of the first parameter;

determine the identification corresponding to the value of the first parameter from among the at least two identifications; and

calculate an initialization value being used for generating the reference signal based on the value of the first parameter and the determined identification.

15. A method for wireless communications, the method comprising:

transmitting, to a user equipment, configuration information including at least two identifications for scrambling;

transmitting, to the user equipment, control information indicating a scrambling identity; and

identifying a reference signal based on the scrambling identity and an identification from the at least two identifications,

wherein the identification from the at least two identifications is determined based on the scrambling identity indicated by the control information.

16. The method of claim 15, further comprising:

transmitting data using the identified reference signal.

17. The method of claim 15, wherein the configuration information is transmitted via a higher layer signaling.

18. The method of claim 15, wherein the control information is transmitted via a physical downlink control channel (PDCCH).

19. The method of claim 15, wherein the determined identification of at least two identifications is indicated by the scrambling identity.

20. The method of claim 15, wherein the reference signal is identified based on the following initialization value,

c_init=(└

n_s,nSCID/2┘

+1)·

(2X_nSCID+1)·

2¹⁶+n_SCID

where n_SCID is the scrambling identity, n_s,nSCID denotes a slot number, and X_nSCID is the determined identification.

21. The method of claim 15, wherein the identification of the at least two identifications is determined by:

determining a value of a first parameter corresponding to the scrambling identity using a mapping table between values of the scrambling identity and values of the first parameter;

determining the identification corresponding to the value of the first parameter from among the at least two identifications; and

calculating an initialization value being used for generating the reference signal based on the value of the first parameter and the determined identification.

22. An apparatus for wireless communications, the apparatus comprising:

a transmitter configured to;

transmit, to a user equipment, configuration information including at least two identifications for scrambling,

transmit, to the user equipment, control information indicating a scrambling identity; and

a processor configured to identify a reference signal based on the scrambling identity and an identification from the at least two identifications,

wherein the identification of the at least two identifications is determined based on the scrambling identity indicated by the control information.

23. The apparatus of claim 22, wherein the transmitter is further configured to transmit data using the identified reference signal.

24. The apparatus of claim 22, wherein the configuration information is transmitted via a higher layer signaling.

25. The apparatus of claim 22, wherein the control information is transmitted via a physical downlink control channel (PDCCH).

26. The apparatus of claim 22, wherein the determined identification of at least two identifications is indicated by the scrambling identity.

27. The apparatus of claim 22, wherein the reference signal is identified based on the following initialization value,

c_init=(└

n_s,nSCID/2┘

+1)·

(2X_nSCID+1)·

2¹⁶+n_SCID

where n_SCID is determined between 0 and 1 based on the scrambling identity, n_s,nSCID denotes a slot number, and X_nSCID is determined based on the determined identification.

28. The apparatus of claim 22, wherein the identification of the at least two identifications is determined by:

determining a value of a first parameter corresponding to the scrambling identity using a mapping table between values of the scrambling identity and values of the first parameter;

determining the identification corresponding to the value of the first parameter from among the at least two identifications; and

calculating an initialization value being used for generating the reference signal based on the value of the first parameter and the determined identification.