Method and device for receiving a multimedia broadcast multicast service in a mobile communication system

• US 10,389,545 B2
• Filed: 07/10/2017
• Issued: 08/20/2019
• Est. Priority Date: 10/10/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Soeng-Hun, Jeong, Kyeong-In
• Primary Examiner(s): Nguyen, Minh-Trang
• Application Number:
  US15/645,531
• Publication Number:
  US 20170310497A1
• Time in Patent Office: 771 Days
• CPC Class Codes: H04L 12/1881 with schedule organisation, e.g. priority, sequence management
• 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 36/0007 for multicast or broadcast services, e.g. MBMS multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

The present disclosure relates to a method and device for receiving a multimedia broadcast multicast service (MBMS) in a mobile communication system. The method for receiving the MBMS of a terminal in the mobile communication system according to an embodiment of the present disclosure is characterized in that it includes: determining whether service area ID (SAI) information on a serving cell is broadcast during the MBMS; receiving the SAI information on the serving cell when it is determined that the SAI information is broadcast; determining, by using the received SAI information of the serving cell, whether an SAI of the MBMS matches the SAI of the serving cell; and changing the cell reselection priority of the frequency of the serving cell to the highest priority if it is determined that the SAI of the MBMS matches the SAI of the serving cell.

Claims

1. A method by a terminal in a wireless communication system, the method comprising:

receiving, on a first cell, information indicating a duration related to a random access response (RAR) through system information;

receiving, on the first cell, a maximum number of preamble transmissions for a random access of a second cell through control information;

transmitting a random access preamble for the random access of the second cell based on the maximum number of preamble transmissions; and

receiving the RAR based on the information.

2. The method of claim 1, wherein the transmitting of the random access preamble further comprises:

increasing a preamble transmission counter by one.

3. The method of claim 1, wherein the transmitting of the random access preamble further comprises:

increasing a preamble transmission counter by one if the RAR is not received within the duration related to the RAR.

4. The method of claim 3, further comprising:

stopping the random access of the second cell if the preamble transmission counter is greater than the maximum number of preamble transmissions.

5. The method of claim 1, wherein the information includes a RAR window size indicating a duration of an RAR window.

6. A terminal in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to;

receive, on a first cell, information indicating a duration related to a random access response (RAR) through system information,

receive, on the first cell, a maximum number of preamble transmissions for a random access of a second cell through control information,

transmit a random access preamble for the random access of the second cell based on the maximum number of preamble transmissions, and

receive the RAR based on the information.

7. The terminal of claim 6, wherein the controller is further configured to increase a preamble transmission counter by one.

8. The terminal of claim 6, wherein the controller is further configured to increase a preamble transmission counter by one if the RAR is not received within the duration related to the RAR.

9. The terminal of claim 6, wherein the controller is further configured to stop the random access of the second cell if the preamble transmission counter is greater than the maximum number of preamble transmissions.

10. The terminal of claim 6, wherein the information includes a RAR window size indicating a duration of an RAR window.

11. A base station in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to;

transmit, on a first cell, information indicating a duration related to a random access response (RAR) through system information,

transmit, on the first cell, a maximum number of preamble transmissions for a random access of a second cell through control information, and

receive a random access preamble for the random access of the second cell,

wherein the random access preamble is transmitted based on the maximum number of preamble transmissions.

12. The base station of claim 11, wherein a preamble transmission counter is increased by one.

13. The base station of claim 11, wherein a preamble transmission counter is increased by one if an RAR is not received within the duration related to the RAR.

14. The base station of claim 13, wherein the random access of the second cell is stopped if the preamble transmission counter is greater than the maximum number of preamble transmissions.

15. The base station of claim 11, wherein the information includes a RAR window size indicating a duration of an RAR window.

16. A method by a base station in a wireless communication system, the method comprising:

transmitting, on a first cell, information indicating a duration related to a random access response (RAR) through system information;

transmitting, on the first cell, a maximum number of preamble transmissions for a random access of a second cell through control information; and

receiving a random access preamble for the random access of the second cell,

wherein the random access preamble is transmitted based on the maximum number of preamble transmissions.

17. The method of claim 16, wherein a preamble transmission counter is increased by one.

18. The method of claim 16, wherein a preamble transmission counter is increased by one if an RAR is not received within the duration related to the RAR.

19. The method of claim 18, wherein the random access of the second cell is stopped if the preamble transmission counter is greater than the maximum number of preamble transmissions.

20. The method of claim 16, wherein the information includes a RAR window size indicating a duration of an RAR window.