Method of transmitting/receiving control message in a mobile communication system providing multimedia broadcast/multicast service

• US 7,515,922 B2
• Filed: 08/15/2003
• Issued: 04/07/2009
• Est. Priority Date: 08/16/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Soeng-Hun, Han, Il, Choi, Sung-Ho, Lee, Kook-Heui
• Primary Examiner(s): Maung; Nay A.
• Assistant Examiner(s): Nguyen; Tuan H
• Application Number:
  US10/641,500
• Publication Number:
  US 20040087320A1
• Time in Patent Office: 2,062 Days
• Field of Search: 455/412.1, 455/414.1, 455/450, 455/451, 455/452.1, 455/458, 455/522, 455/515, 370/312, 370/328, 370/335, 370/432, 370/390
• US Class Current: 455/515
• CPC Class Codes: H04H 20/16 Arrangements for broadcast or for distribution of identical information repeatedly
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A control message transmitting/receiving method in an MBMS-supporting mobile communication system. In the present invention, an RNC periodically transmits control messages related to MBMS RB setup to UEs. Thus, although a UE initially fails to receive an intended MBMS service, it can set up an MBMS RB by receiving a related retransmitted control message. Also, the RNC periodically provides information about ongoing MBMS services on a cell basis so that a UE can decide whether its requested MBMS service is in progress and request information required to set up an MBMS RB for the MBMS service to the RNC by individual signaling.

Claims

1. A method for receiving a broadcasting service in a user equipment (UE) in a mobile communication system where requested broadcasting services are provided to a plurality of UEs within a cell through a radio network controller (RNC), the method comprising the steps of:

receiving a broadcasting status message containing information for ongoing broadcasting services by the cell from the RNC and determining whether the broadcasting service is included in the broadcasting status message in a UE that fails to receive control information for the broadcasting service;

requesting the control information for the broadcasting service to the RNC if the broadcasting service is included in the broadcasting status message; and

receiving the broadcasting service is included in the broadcasting status message after receiving the control information from the RNC.

2. The method of claim 1, wherein the broadcasting status message is transmitted repeatedly on a scheduled cycle.

3. The method of claim 2, wherein UEs in a cell are notified of the scheduled cycle by a cell broadcasting service (CBS) on a cell by cell basis.

4. The method of claim 1, wherein the broadcasting status message is transmitted by the cell broadcasting service (CBS) on a cell by cell basis.

5. The method of claim 1, wherein the broadcasting service control information is requested by a radio bearer information retransmission request message containing a message type, the ID (Identification) of the UE, and the ID of the broadcasting service.

6. The method of claim 1, wherein only the requesting UE receives the broadcasting service control information.

7. The method of claim 6, wherein the broadcasting service control information contains a radio network temporary ID (RNTI) identifying the UE.

8. The method of claim 1, wherein a terminated broadcasting service is excluded from the broadcasting status message.

9. A method for providing a broadcasting service to a user equipment (UE) in a radio network controller (RNC) in a mobile communication system where requested broadcasting services are provided to a plurality of UEs within a cell through the RNC, the method comprising the steps of:

transmitting to the UE a broadcasting status message containing information about the types of ongoing broadcasting services for the cell;

receiving a request for control information about the broadcasting service from the UE, if the UE finds the broadcasting service in the broadcasting status message and recognizes that the UE failed to receive the broadcasting service control information;

transmitting the broadcasting service control information to the UE; and

confirming that the UE received the broadcasting service control information.

10. The method of claim 9, wherein the broadcasting status message is transmitted repeatedly on a scheduled cycle.

11. The method of claim 10, wherein the UEs are notified of the scheduled cycle by a cell broadcasting service (CBS) on a cell by cell basis.

12. The method of claim 9, wherein the broadcasting status message is transmitted by the CBS on a cell by cell basis.

13. The method of claim 9, wherein the broadcasting service control information is requested by a radio bearer information retransmission request message containing a message type, the ID (Identification) of the UE, and the ID of the broadcasting service.

14. The method of claim 9, wherein only the requesting UE receives the broadcasting service control information.

15. The method of claim 14, wherein the broadcasting service control information contains a radio network temporary ID (RNTI) identifying the UE.

16. The method of claim 9, wherein a terminated broadcasting service is excluded from the broadcasting status message.