System information transmission method and subframe structure

• US 8,483,161 B2
• Filed: 04/30/2009
• Issued: 07/09/2013
• Est. Priority Date: 04/30/2008
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ihm, Bin Chul, Kim, Jeong Ki
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): La, Phong
• Application Number:
  US12/990,479
• Publication Number:
  US 20110090860A1
• Time in Patent Office: 1,531 Days
• Field of Search: 370/312, 370/390, 370/432, 370/328, 370/338, 370/356, 370/366, 370/350, 370/503, 370/504, 370/510, 370/513, 370/514, 370/515, 370/502, 455/502, 375/260
• US Class Current: 370/329
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Methods for transmitting system information, subframe structures, and pilot structures in a wireless access system are disclosed. A method for receiving system information in a wireless access system includes receiving a Network Common Information (NCI) channel including network common system information from a Base Station (BS), receiving a synchronization channel from the BS, for acquiring synchronization with the BS, receiving a Cell Specific Information (CSI) channel including cell specific system information which is specific to the BS from the BS, and decoding the NCI channel and the CSI channel using the synchronization channel. The NCI channel is transmitted over a first frequency channel and the CSI channel is transmitted over a second frequency channel.

Claims

1. A method for receiving system information in a wireless access system, the method comprising:

receiving a Network Common Information (NCI) channel including network common system information from a Base Station (BS);

receiving a synchronization channel from the BS, for acquiring synchronization with the BS;

receiving a Cell Specific Information (CSI) channel including cell specific system information which is specific to the BS from the BS; and

decoding the NCI channel and the CSI channel using the synchronization channel,

wherein the NCI channel is transmitted over a Single Frequency Network (SFN) which is a broadcast network where the BS and a neighbor BS simultaneously transmit a same NCI over a same frequency channel, and

wherein the synchronization channel is located between the NCI channel and the CSI channel in a subframe.

2. The method according to claim 1, wherein the NCI channel, the synchronization channel, and the CSI channel are allocated to a first subframe of a superframe.

3. The method according to claim 2, wherein the NCI channel is a primary broadcast channel and the CSI channel is a secondary broadcast channel.

4. The method according to claim 2, wherein the synchronization channel includes a primary synchronization channel and a secondary synchronization channel.

5. The method according to claim 1, wherein the CSI is transmitted at a position different from a position of CSI of a neighbor BS in at least time or frequency in the subframe.

11. The method according to claim 1, wherein the synchronization channel is located next to the NCI channel in the subframe.

12. The method according to claim 1, wherein the CSI channel is transmitted in a more robust Modulation Coding Scheme (MCS) than the NCI channel.

6. A method for transmitting system information in a wireless access system, the method comprising:

transmitting a Network Common Information (NCI) channel including network common system information to a Mobile Station (MS);

transmitting a synchronization channel to the MS, for synchronization with a Base Station (BS); and

transmitting to the MS a Cell Specific Information (CSI) channel including cell specific system information which is specific to the BS,

wherein the NCI channel is transmitted over a Single Frequency Network (SFN) which is a broadcast network where the BS and a neighbor BS simultaneously transmit a same NCI over a same frequency channel, and

wherein the synchronization channel is located between the NCI channel and the CSI channel in a subframe.

7. The method according to claim 6, wherein the NCI channel, the synchronization channel, and the CSI channel are allocated to a first subframe of a superframe.

8. The method according to claim 7, wherein the NCI channel is a primary broadcast channel and the CSI channel is a secondary broadcast channel.

9. The method according to claim 7, wherein the synchronization channel includes a primary synchronization channel and a secondary synchronization channel.

10. The method according to claim 6, wherein the CSI is transmitted at a position different from a position of CSI of a neighbor BS in at least time or frequency in the subframe.

13. The method according to claim 6, wherein the synchronization channel is located next to the NCI channel in the subframe.

14. The method according to claim 6, wherein the CSI channel is transmitted in a more robust Modulation Coding Scheme (MCS) than the NCI channel.