Method and apparatus for controlling network access in a wireless communication system

• US 9,301,324 B2
• Filed: 11/13/2012
• Issued: 03/29/2016
• Est. Priority Date: 11/14/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Ki-Dong
• Primary Examiner(s): Elpenord, Candal
• Application Number:
  US14/357,757
• Publication Number:
  US 20140301344A1
• Time in Patent Office: 1,232 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/34 Selective release of ongoing connections
• CPC Class Codes: H04W 76/36 for reassigning the resources associated with the released connections

Abstract

The present invention is directed to a method and an apparatus for use in a wireless communication system. Specifically, the present invention is directed to a method of performing random access procedure for network access and an apparatus therefore, in which the method comprises: receiving a first downlink signal including first information at time t1, the first information indicating a first time duration T1; receiving a second downlink signal including second information at a time t1+b within T1, the second information indicating a second time duration T2; and performing the random access procedure for network access, wherein if T2 is larger than b, the random access procedure is allowed after T2−b has passed from t1+b, wherein if T2 is equal to or less than b, the random access procedure is allowed after t1+b.

Claims

1. A method of performing a random access procedure for network access at a User Equipment (UE) in a wireless communication system, the method comprising:

receiving a first downlink signal including first information at a time t1, the first information indicating a first time duration T1;

receiving a second downlink signal including second information at a time t1+b within T1, the second information indicating a second time duration T2; and

performing the random access procedure for network access,

wherein b is a time duration taken to receive the second downlink signal after t1,

wherein if T2 is larger than b, the random access procedure is allowed after T2−

b has passed from t1+b,

wherein if T2 is equal to or less than b, the random access procedure is allowed after t1+b.

2. The method of claim 1, wherein the first downlink signal includes a message for rejecting a radio resource control (RRC) connection request or a message for releasing a RRC connection.

3. The method of claim 1, wherein the first downlink signal includes a system information block, and the first information further indicates whether the random access process is allowed or barred during T1 from t1.

4. The method of claim 1, wherein the network access is for a machine type communication (MTC).

5. The method of claim 1, wherein the UE is a delay-tolerant device.

6. A User Equipment (UE) configured to perform a random access procedure for network access in a wireless communication system, the UE comprising:

a radio frequency (RF) unit; and

a processor, wherein the processor is configured to;

receive a first downlink signal including first information at a time t1, the first information indicating a first time duration T1,

receive a second downlink signal including second information at a time t1+b within T1, the second information indicating a second time duration T2, and

perform the random access procedure for network access,

wherein b is a time duration taken to receive the second downlink signal after t1,

wherein if T2 is larger than b, the random access procedure is allowed after T2−

b has passed from t1+b,

wherein if T2 is equal to or less than b, the random access procedure is allowed after t1+b.

7. The UE of claim 6, wherein the first downlink signal includes a message for rejecting a radio resource control (RRC) connection request or a message for releasing a RRC connection.

8. The UE of claim 6, wherein the first downlink signal includes a system information block, and the first information further indicates whether the random access process is allowed or barred during T1 from t1.

9. The UE of claim 6, wherein the network access is for a machine type communication (MTC).

10. The UE of claim 6, wherein the UE is a delay-tolerant device.

11. A method of controlling a random access procedure for network access in a wireless communication system, the method comprising:

transmitting, by a Base Station (BS), a first signal to a User Equipment (UE) at a time t1, the first signal indicating a first time duration T1;

transmitting, by the BS, a second signal to a Mobility Management Entity (MME), the second signal including identification information of the UE;

transmitting, by the BS, a third signal to the MME if the BS detects network access congestion relief, the third signal informing the network access congestion relief;

receiving, by the BS, a fourth signal from the MME, the fourth signal indicating a second time duration T2 for the UE; and

transmitting, by the BS, a fifth signal to the UE at a time t1+b, the fifth signal indicating the second time duration T2,

wherein b is a time duration taken to receive the second downlink signal after t1,

wherein if T2 is larger than b, the UE is allowed to perform the random access procedure after T2−

b has passed from t1+b,

wherein if T2 is equal to or less than b, the UE is allowed to perform the random access procedure after t1+b.

12. The method of claim 11, wherein the first signal includes a message for rejecting a radio resource control (RRC) connection request or a message for releasing a RRC connection.

13. The method of claim 11, wherein the first signal includes a system information block, and the first signal further indicates whether the random access process is allowed or barred during T1 from t1.

14. The method of claim 11, wherein the network access is for a machine type communication (MTC).

15. The method of claim 11, wherein the UE is a delay-tolerant device.

16. A wireless communication system configured to control a random access procedure for network access, the wireless communication system comprising:

a User Equipment (UE);

a Base Station (BS); and

a Mobility Management Entity (MME),

wherein the BS is configured to;

transmit a first signal to a User Equipment (UE) at a time t1, the first signal indicating a first time duration T1,

transmit a second signal to the MME, the second signal including identification information of the UE,

transmit a third signal to the MME if the BS detects network access congestion relief, the third signal informing the network access congestion relief,

receive a fourth signal from the MME, the fourth signal indicating a second time duration T2 for the UE, and

transmit a fifth signal to the UE at a time t1+b, the fifth signal indicating the second time duration T2,

wherein b is a time duration taken to receive the second downlink signal after t1,

wherein if T2 is larger than b, the UE is allowed to perform the random access procedure after T2−

b has passed from t1+b,

wherein if T2 is equal to or less than b, the UE is allowed to perform the random access procedure after t1+b.

17. The wireless communication system of claim 16, wherein the first signal includes a message for rejecting a radio resource control (RRC) connection request or a message for releasing a RRC connection.

18. The wireless communication system of claim 16, wherein the first signal includes a system information block, and the f first signal further indicates whether the random access process is allowed or barred during T1 from t1.

19. The wireless communication system of claim 16, wherein the network access is for a machine type communication (MTC).

20. The wireless communication system of claim 16, wherein the UE is a delay-tolerant device.