Network access method in mobile communication system and terminal supporting the same

• US 8,126,487 B2
• Filed: 10/23/2007
• Issued: 02/28/2012
• Est. Priority Date: 10/23/2006
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Moon Il, Ihm, Bin Chul, Lee, Wook Bong, Park, Sung Jun
• Primary Examiner(s): Mai, Lam T
• Application Number:
  US12/446,443
• Publication Number:
  US 20100317382A1
• Time in Patent Office: 1,589 Days
• Field of Search: 455/7, 455/9, 455/70, 455/101, 455/103, 455/418, 455/436, 455/501, 455/515, 370/252, 370/294, 370/295, 370/310, 370/315, 370/328, 370/329, 370/331, 370/335, 370/336, 370/461
• US Class Current: 455/501
• CPC Class Codes: H04B 7/0628 Diversity capabilities
• 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 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0641 Differential feedback
• CPC Class Codes: H04B 7/0645 Variable feedback
• CPC Class Codes: H04B 7/0686 Hybrid systems, i.e. switching and simultaneous transmission
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A method for transmitting multiple antenna related information such as a multiple antenna receiver type and/or feedback overhead information to a base station and a terminal for supporting the same are disclosed. Since a size of feedback information is varied depending on the receiver type, it is necessary to properly allocate feedback channel resources suitable for characteristics of a receiving side. To this end, the multiple antenna related information is previously reported to the base station when the terminal initially accesses a network.

Claims

1. A network access method of a terminal in a multiple antenna system, the network access method comprising:

transmitting a random access channel (RACH) preamble;

receiving a random access response message in response to the RACH preamble; and

transmitting an RRC connection request message in response to the random access response message,

wherein the RRC connection request message includes multiple antenna related information.

2. The network access method of claim 1, wherein the multiple antenna related information includes at least a multiple antenna receiver type or feedback overhead indicator information.

3. The network access method of claim 2, wherein the multiple antenna receiver type includes a minimum mean squared error (MMSE) receiver, a maximum likelihood (ML) receiver, or a minimum mean squared error with successive interference cancellation (MMSE-SIC) receiver.

4. The network access method of claim 2, wherein a size of channel quality indicator (CQI) information received from a transmitting side is varied depending on at least the multiple antenna receiver type or a layer permutation scheme used.

5. The network access method of claim 4, wherein the layer permutation scheme includes a virtual antenna permutation (VAP) scheme or a generalized cyclic delay diversity (GCDD) scheme.

6. A terminal which supports initial network access in a mobile communication system, the terminal comprising:

a transmitter configured to transmit a preamble or a message; and

a controller configured to control the transmitter to transmit a random access channel (RACH) preamble in an idle mode, and to transmit an RRC connection request message in response to a random access response message if the random access response message in response to the RACH preamble is received,

wherein the RRC connection request message includes multiple antenna related information.

7. The terminal of claim 6, wherein the multiple antenna related information includes at least a multiple antenna receiver type or feedback overhead indicator information.

8. The terminal of claim 7, wherein the multiple antenna receiver type includes a minimum mean squared error (MMSE) receiver, a maximum likelihood (ML) receiver, or a minimum mean squared error with successive interference cancellation (MMSE-SIC) receiver.

9. A base station which supports initial network access in a mobile communication system, the base station comprising:

a transmitter configured to transmit a message; and

a controller configured to control the transmitter to transmit a random access response message in response to a random access channel (RACH) preamble if the RACH preamble is received, and to transmit a contention resolution message in response to an RRC connection request message if the RRC connection request message in response to the random access response message is received,

wherein the RRC connection request message includes multiple antenna related information.