Method for receiving system information in multimedia broadcast/multicast service

• US 8,265,007 B2
• Filed: 01/30/2008
• Issued: 09/11/2012
• Est. Priority Date: 01/31/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young-Dae, Chun, Sung-Duck, Park, Sung-Jun, Yi, Seung-June
• Primary Examiner(s): Rutkowski, Jeffrey M
• Application Number:
  US12/521,503
• Publication Number:
  US 20100103854A1
• Time in Patent Office: 1,686 Days
• Field of Search: None
• US Class Current: 370/328
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

The present invention allows the terminal not to receive the same system information from corresponding cell when the terminal is moved to another cell within the global MBMS area, thereby preventing unnecessary reception and preventing network resources from being wasted.

Claims

1. A method for receiving system information by a receiver in a wireless network, the method performed by the receiver and comprising:

wirelessly receiving, from a first base station in a first area, first indication information about first system information of the first area;

wirelessly receiving, from the first base station, the first system information of the first area;

storing the first indication information and the first system information;

using the first system information in the first area;

upon moving to a second area from the first area, wirelessly receiving, from a second base station in the second area, second indication information about second system information of the second area;

storing the second indication information and using the second indication information to determine whether or not the second system information is the same as the stored first system information in order to determine whether or not to receive the second system information;

upon determining that the second system information is the same as the first system information and therefore is not to be received, not receiving the second system information from the second base station and using the first system information in the second area; and

upon determining that the second system information is not the same as the first system information and therefore is to be received, wirelessly receiving the second system information from the second base station, storing the second system information, and using the second system information in the second area.

2. The method of claim 1, wherein each of the first and second indication information comprises a value tag or update information corresponding to the each of the first and second system information.

3. The method of claim 1, wherein each of the first and second indication information comprises an identifier of a global MBMS area.

4. The method of claim 1, wherein each of the first and second area is a cell or an MBSFN area.

5. The method of claim 1, wherein each of the first and second indication information is received via one or more of a control channel corresponding to a first layer or a second layer, a packet data control channel (PDCCH), a broadcast channel (BCH), and a download synchronization channel (DL SCH).

6. The method of claim 1, wherein each of the first and second system information is related to a multimedia broadcast/multicast service.

7. The method of claim 1, wherein each of the first and second system information is received via one or more of a broadcast channel (BCH) and a download synchronization channel (DL SCH).

8. The method of claim 1, wherein each of the first and second indication information and each of the first and second system information are received via channels different from each other.

9. A method of controlling a wireless network including a first base station in a first area and a second base station in a second area, the method performed by a server and comprising:

controlling the first base station to transmit, to a mobile terminal, first indication information about first system information of the first area;

controlling the first base station to transmit, to the mobile terminal, the first system information of the first area,

wherein the first indication information and the first system information are stored and used by the mobile terminal;

controlling the second base station to wirelessly transmit, to the mobile terminal, second indication information about second system information of the second area;

determining whether or not the second system information is the same as the first system information;

upon determining that the second system information is the same as the first system information, controlling the second base station to not transmit the second system information to the mobile terminal so that the mobile terminal uses the first system information in the second area; and

upon determining that the second system information is not the same as the first system information, controlling the second base station to wirelessly transmit the second system information to the mobile terminal so that the mobile terminal uses the second system information in the second area.

10. The method of claim 9, wherein the server is an MCE (MBMS Coordinating Entity).

11. The method of claim 9, further comprising:

receiving, from the first base station, at least one first indication that indicates whether or not the first indication information and the first system information have been transmitted to the mobile terminal;

receiving, from the second base station, at least one second indication that indicates whether or not the second indication information and the second system information have been transmitted to the mobile terminal; and

storing the at least one first indication and the at least one second indication.

12. A user device in a wireless network, comprising:

a transmitting/receiving unit;

a storage unit; and

a controller operatively connected to the transmitting/receiving unit and the storage unit, the controller configured to;

wirelessly receive, from a first base station in a first area, first indication information about first system information of the first area,

wirelessly receive, from the first base station, the first system information of the first area,

store the first indication information and the first system information,

use the first system information in the first area,

upon moving to a second area from the first area, wirelessly receive, from a second base station in the second area, second indication information about second system information of the second area,

store the second indication information and use the second indication information to determine whether or not the second system information is the same as the stored first system information in order to determine whether or not to receive the second system information,

upon determining that the second system information is the same as the first system information and therefore is not to be received, not receive the second system information from the second base station and use the first system information in the second area, and

upon determining that the second system information is not the same as the first system information and therefore is to be received, wirelessly receive the second system information from the second base station, store the second system information, and use the second system information in the second area.

13. A server in a wireless network including a first base station in a first area and a second base station in a second area, the server comprising:

a transmitting/receiving unit;

a storage unit; and

a controller operatively connected to the transmitting/receiving unit and the storage unit, the controller configured to;

control the first base station to transmit, to a mobile terminal, first indication information about first system information of the first area,

control the first base station to transmit, to the mobile terminal, the first system information of the first area,

wherein the first indication information and the first system information are stored and used by the mobile terminal,

control the second base station to wirelessly transmit, to the mobile terminal, second indication information about second system information of the second area,

determine whether or not the second system information is the same as the first system information,

upon determining that the second system information is the same as the first system information, control the second base station to not transmit the second system information to the mobile terminal, and

upon determining that the second system information is not the same as the first system information, control the second base station to wirelessly transmit the second system information to the mobile terminal.

14. The server of claim 13, wherein the controller is further configured to

receive, from the first base station, at least one first indication that indicates whether or not the first indication information and the first system information have been transmitted to the mobile terminal,

receive, from the second base station, at least one second indication that indicates whether or not the second indication information and the second system information have been transmitted to the mobile terminal, and

store the at least one first indication and the at least one second indication.