Method and apparatus for transmitting rank indication information

• US 8,913,673 B2
• Filed: 07/03/2009
• Issued: 12/16/2014
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Dai, Bo, Xia, Shuqiang, Liang, Chunli, Hao, Peng, Yu, Guanghui
• Primary Examiner(s): Garcia, Santiago
• Application Number:
  US13/003,997
• Publication Number:
  US 20110129033A1
• Time in Patent Office: 1,992 Days
• Field of Search: 375/260
• US Class Current: 375/260
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0671 using different delays between antennas

Abstract

The present invention discloses a method and apparatus for transmitting rank indication information, in which the method comprises: when rank indication information and a sounding reference signal are transmitted in a same sub-frame, loading the sounding reference signal to a last symbol of a sub-frame, and transmitting the rank indication information and the sounding reference signal. The present invention prevents destruction of orthogonality of codes between PUCCH channels when the rank indication information and the sounding reference signal are transmitted in the same sub-frame, thus the overall performance of the system can be ensured.

Claims

1. A method for transmitting Rank Indication, RI, information, when a target user transmits information to a base station in the Long Term Evolution (LTE) system, comprising:

in the LTE system, when the RI information and a Sounding Reference Signal, SRS, are transmitted in a same sub-frame, loading the SRS in a last symbol of the sub-frame; and

transmitting the RI information and the SRS by the target user, wherein the transmitting the RI information and the SRS specifically is;

transmitting the SRS in the last symbol and transmitting the RI information in other symbols except for the last symbol by using a Single Carrier Frequency Division Multiple Access method; and

wherein the SRS is used for sounding the state of channel.

2. The method according to claim 1, wherein the sub-frame structure comprises one of the following structures:

a normal Cyclic Prefix, CP, sub-frame structure, an expanded CP sub-frame structure.

3. A method for transmitting Rank Indication, RI, information, when a target user transmits information to a base station in the LTE system, comprising:

in the LTE system, when the RI information and a Sounding Reference Signal, SRS, are to be transmitted in a same sub-frame, only transmitting the RI information by the target user;

wherein the SRS is used for sounding the state of channel.

4. An apparatus for transmitting Rank Indication, RI, information, comprising:

a loading module, configured to, in the LTE system, when the RI information and a Sounding Reference Signal, SRS, are transmitted in a same sub-frame, load the SRS in a last symbol of the sub-frame; and

a transmitting module, configured to transmit the SRS in the last symbol and the RI information in other symbols except for the last symbol from a target user to a base station in the LTE system by using Single Carrier Frequency Division Multiple Access method;

wherein the SRS is used for sounding the state of channel.