METHOD AND APPARATUS FOR CONTROLLING NETWORK ACCESS OF UE IN WIRELESS COMMUNICATION SYSTEM

• US 20110199898A1
• Filed: 02/16/2011
• Published: 08/18/2011
• Est. Priority Date: 02/16/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: CHOI, Sung Ho, BAE, Beom Sik, LIM, Han Na, LIM, Chae Gwon, CHO, Song Yean
• Granted Patent: US 9,066,277 B2
• Time in Patent Office: Days
• US Class Current: 370/230
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/06 based on traffic conditions
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure

Abstract

A method and an apparatus for controlling network access of a User Equipment (UE) based on the network'"'"'s load and time tolerance (delay tolerance) are provided. A network access method for a terminal in a wireless communication system includes sending an access request message containing a time-tolerant indicator at a predefined time, determining, when a reject message is received, a cause value and a hold time contained in the reject message, and re-sending the access request message after the hold time elapses.

Claims

1. A network access method for a terminal in a wireless communication system, the network access method comprising:

sending an access request message containing a time-tolerant indicator at a predefined time;

determining, when a reject message is received, a cause value and a hold time contained in the reject message; and

re-sending the access request message after the hold time elapses.

2. The method of claim 1, wherein the cause value indicates an entity in an overload status, and the entity comprises at least one of an evolved Node B (eNB), a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and a Packet Data Network Gateway (P-GW).

3. The method of claim 1, wherein the access request message comprises at least one of a Radio Resource Control (RRC) request message, an attach request message, a service request message, and a tracking area update message.

4. The method of claim 3, further comprising:

configuring a tolerant level, a weight factor penalty, and a hold time penalty;

receiving barring information having a weight factor and a holding time; and

configuring a time for sending the access request message by comparing the received barring information with the configured tolerant level and weight factor.

5. The method of claim 4, wherein the configuring of the time for sending the access request message comprises waiting, when the weight factor is greater than (>

) the tolerant level, for the hold time before retrying network access.

6. The method of claim 4, wherein the configuring of the time for sending the access request message comprises:

generating, when the weight factor is less than (<

) the tolerant level, random access numbers as much as weight factor penalty;

setting, when all the random access numbers are larger than the weight factor, the time for sending the access request message; and

waiting, when any one of the random access numbers is smaller than the weight factor, for the hold time before retrying network access.

7. A network access control method of a base station in a wireless communication system, the network access control method comprising:

receiving an overload start message having a hold time from a Mobility Management Entity (MME);

receiving a Radio Resource Control (RRC) connection request message from a terminal; and

sending, when the RRC connection request message includes a time-tolerant indicator, an RRC connection release message containing a hold time to the terminal,

wherein the terminal retries network access after the hold time elapses.

8. The network access control method of claim 7, wherein the RRC connection release message comprises a cause value which indicates an entity in an overload status, the entity comprising at least one of an evolved Node B (eNB), an MME, a Serving-Gateway (S-GW), and a Packet data network Gateway (P-GW), and the hold time is a time configured according to the cause value.

9. A network access control method of a Mobility Management Entity (MME) in a wireless communication system, the network access control method comprising:

receiving a Non-Access Stratum (NAS) request message from a terminal;

determining, when the NAS request message comprises a time-tolerant indicator, load level of the MME, a Serving-Gateway (S-GW) and a Packet Data Network Gateway (P-GW);

sending, when the load level is equal to a configured load level, a reject message containing a hold time to the terminal; and

controlling the terminal to retry network access after the hold time elapses.

10. The network access control method of claim 9, wherein the reject message comprises a cause value which indicates an entity in an overload status, the entity comprising at least one of an evolved Node B (eNB), an MME, an S-GW, and a P-GW, and the hold time is a time configured according to the cause value.

11. The network access control method of claim 10, wherein the NAS request message comprises at least one of an attach request message, a service request message, and a tracking area update message.

12. The network access control method of claim 9, wherein the request message comprises an Access Stratum (AS) message including the time-tolerant indication.

13. The network access control method of claim 12, wherein the AS message comprises a Radio Resource Control (RRC) connection request message.

14. A network access control apparatus for a wireless communication system, the network access control apparatus comprising:

a terminal for sending an access request message containing a time-tolerant indicator at a predefined time, for determining, when a reject message is received, a cause value and a hold time contained in the reject message, and for re-sending the access request message after the hold time elapses; and

an evolved Node B (eNB) for receiving a network connection request message from the terminal and for sending, when the network is in an overload status, a reject message having a hold time.

15. The network access control apparatus of claim 14, further comprising a Mobility Management Entity (MME) for sending, when a load level comprising at least one of the MME, a Serving-Gateway (S-GW), or a Packet Data Network Gateway (P-GW) is equal to a configured load level, an overload start message to the eNB.

16. The network access control apparatus of claim 15, wherein the reject message comprises a cause value which indicates an entity in an overload status, the entity comprising at least one of an eNB, an MME, an S-GW, and a P-GW, and the hold time is a time configured according to the cause value.