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

• US 9,467,973 B2
• Filed: 09/23/2015
• Issued: 10/11/2016
• Est. Priority Date: 10/10/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Soeng-Hun, Jeong, Kyeong-In
• Primary Examiner(s): CHO, HONG SOL
• Application Number:
  US14/862,694
• Publication Number:
  US 20160014721A1
• Time in Patent Office: 384 Days
• Field of Search: None
• US Class Current: 1/1
• 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 invention 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 invention 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 primary cell, a random access response (RAR) window size indicating duration of an RAR window through system information;

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

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

receiving an RAR based on the RAR window size.

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 random access response window.

4. The method of claim 3, further comprising:

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

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

a transceiver configured to transmit and receive a signal; and

a controller configured to;

receive, on a primary cell, a random access response (RAR) window size indicating duration of an RAR window through system information,

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

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

receive an RAR based on the RAR window size.

6. The terminal of claim 5, wherein the controller is further configured to increase a preamble transmission counter by one.

7. The terminal of claim 5, wherein the controller is further configured to increase a preamble transmission counter by one if the RAR is not received within the random access response window.

8. The terminal of claim 7, wherein the controller is further configured to stop the random access of the secondary cell if the preamble transmission counter is greater than the maximum number of preamble transmissions.

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

a transceiver configured to transmit and receive a signal; and

a controller configured to;

transmit, on a primary cell, a random access response (RAR) window size indicating duration of an RAR window through system information,

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

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

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

10. The base station of claim 9, wherein a preamble transmission counter is increased by one.

11. The base station of claim 9, wherein a preamble transmission counter is increased by one if an RAR is not received within the RAR window by the terminal.

12. The base station of claim 11, wherein the random access of the secondary cell is stopped if the preamble transmission counter is greater than the maximum number of preamble transmissions.

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

transmitting, on a primary cell, a random access response (RAR) window size indicating duration of an RAR window through system information;

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

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

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

14. The method of claim 13, wherein a preamble transmission counter is increased by one.

15. The method of claim 13, wherein a preamble transmission counter is increased by one if an RAR is not received within the RAR window by the terminal.

16. The method of claim 15, wherein the random access of the secondary cell is stopped if the preamble transmission counter is greater than the maximum number of preamble transmissions.