Effective system information reception method

• US 8,862,162 B2
• Filed: 03/27/2012
• Issued: 10/14/2014
• Est. Priority Date: 06/20/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Sung-Duck, Lee, Young-Dae, Park, Sung-Jun, Yi, Seung-June
• Primary Examiner(s): Lai, Daniel
• Application Number:
  US13/431,795
• Publication Number:
  US 20120231820A1
• Time in Patent Office: 931 Days
• Field of Search: 455/422.1, 455450-453, 455/44, 455/509, 455/426.1, 455/552.1, 455/553.1, 455/435.2, 455/458, 455/510, 370/310, 370/322, 370/329, 370/348, 370/330, 370/328, 370/338, 370/311, 370/312, 370/350
• US Class Current: 455/458
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

Disclosed is the method for informing, by a wireless communication system, to a terminal about information required for reception when the terminal is connected to the wireless communication system, in which a base station updates system information according to a preset period, and the terminal efficiently receives or checks any update of the system information based on the period.

Claims

1. A method of receiving updated system information in a wireless communication system, the method comprising:

receiving, by a terminal, a notification for changing of system information, wherein the notification is received via a paging channel (PCH);

receiving, by the terminal, the updated system information within a modification period and only after receiving the notification,

wherein the modification period has boundaries which are defined by a system frame number (SFN) and a specific value (N) configured by the system information,

wherein the modification period boundaries are defined by the SFN mod N,

wherein the modification period is a Broadcast Control Channel (BCCH) modification period,

wherein the notification is received through a current Broadcast Control Channel (BCCH) modification period and the updated system information is received within a next BCCH modification period,

wherein the system information changes only occur at the modification period, and

wherein the updated system information is received with same content within the modification period.

2. The method of claim 1, wherein current system information is valid until the modification period upon receiving the notification.

3. The method of claim 1, wherein the modification period indicates a minimum period in which the system information can be modified.

4. The method of claim 1, wherein the modification period indicates a minimum period in which a network can change the system information.

5. The method of claim 1, wherein the modification period indicates a minimum time in which the network should wait for the next updated system information after changing the system information.

6. The method of claim 1, wherein the modification period indicates a maximum period in which the terminal checks whether or not the system information has been modified.

7. A method of transmitting updated system information in a wireless communication system, the method comprising:

transmitting, by a network, a notification for changing of system information, wherein the notification is transmitted through a paging channel;

transmitting, by the network, the updated system information within a modification period and only after transmitting the notification,

wherein the modification period has boundaries which are defined by a system frame number (SFN) and a specific value (N) configured by the system information,

wherein the modification period boundaries are defined by the SFN mod N,

wherein the modification period is a Broadcast Control Channel (BCCH) modification period,

wherein the notification is transmitted through a current Broadcast Control Channel (BCCH) modification period and the updated system information is transmitted within a next BCCH modification period,

wherein the system information changes only occur at the modification period, and

wherein the updated system information is transmitted with same content within the modification period.

8. The method of claim 7, wherein current system information is valid by a terminal until the modification.

9. The method of claim 7, wherein the modification period indicates a minimum period in which the system information can be modified.

10. The method of claim 7, wherein the modification period indicates a minimum period in which the network can change the system information.

11. The method of claim 7, wherein the modification period indicates a minimum time in which the network should wait for the next updated system information after changing the system information.

12. The method of claim 7, wherein the modification period indicates a maximum period in which a terminal receiving the updated system information checks whether or not the system information has been modified.

13. A mobile terminal for receiving updated system information in a wireless communications system, the mobile terminal comprising:

a processor configured to perform;

receiving a notification for changing of system information, wherein the notification is received via a paging channel (PCH);

receiving the updated system information within a modification period and only after receiving the notification,

wherein the modification period has boundaries which are defined by a system frame number (SFN) and a specific value (N) configured by the system information,

wherein the modification period boundaries are defined by the SFN mod N,

wherein the modification period is a Broadcast Control Channel (BCCH) modification period,

wherein the notification is received through a current Broadcast Control Channel (BCCH) modification period and the updated system information is received within a next BCCH modification period,

wherein the system information changes only occur at the modification period, and

wherein the updated system information is received with same content within the modification period.