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

• US 20040087320A1
• Filed: 08/15/2003
• Published: 05/06/2004
• Est. Priority Date: 08/16/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Sung-Ho, Kim, Soeng-Hun, Lee, Kook-Heui, Han, Il
• Granted Patent: US 7,515,922 B2
• Time in Patent Office: Days
• US Class Current: 455/458
• 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:

determining whether the broadcasting service is included in a broadcasting status message containing information about the types of ongoing broadcasting services for the cell, if the UE fails to receive control information about the broadcasting service from the RNC;

requesting the broadcasting service control information from the RNC if the broadcasting service is included in the broadcasting status message;

receiving the broadcasting service control information from the RNC; and

receiving the broadcasting service according to the broadcasting service control information.

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) identifing 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.

17. A method for providing a packet data service to at least one user equipment (UE) in a radio network controller (RNC) in a mobile communication system where the packet data service is provided to the at least one UE upon request from the at least one UE, the method comprising the steps of:

transmitting to the at least one UE a paging indicator indicating that the at least one UE will be paged, paging information paging the at least one UE in correspondence with the paging indicator, and radio bear information for the packet data service; and

retransmitting the paging indicator, the paging information, and the radio bearer information in every predetermined period until the packet data service is terminated.

18. The method of claim 17, wherein the paging indicator is transmitted in a position of a paging indicator channel (PICH), the position being calculated using a temporary multicast group identity (TMGI) for group paging and a discontinuous reception (DRX) associated with a monitoring period.

19. The method of claim 18, wherein the paging information is transmitted on a paging channel indicated by the PICH.

20. The method of claim 19, wherein the radio bearer information is transmitted to a plurality of UEs on a forward access channel (FACH) by group signaling.

21. The method of claim 17, wherein the predetermined period is longer than time required to transmit the paging indicator, the paging information, and the radio bearer information once, and shorter than the duration time of the packet data service.

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

receiving from the RNC a paging indicator that the UE will be paged in connection with the packet data service, paging information according to the paging indicator, and radio bear information for the packet data service; and

receiving packet data for the packet data service from the RNC without transmitting a response control message for the radio bearer information to the RNC.

23. The method of claim 22, wherein if the UE fails to receive any of the paging indicator, the paging information, and the radio bearer information, the paging indicator, the paging information, and the radio bearer information is repeatedly transmitted in every predetermined period until the packet data service is terminated.