Method of controlling handover

• US 10,015,704 B2
• Filed: 07/26/2013
• Issued: 07/03/2018
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: Lee, Hyun-Song, Heo, Si-Young, Lee, Kyungjun, Tcha, Yongjoo
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Hampton, Tarell
• Application Number:
  US14/652,121
• Publication Number:
  US 20150341834A1
• Time in Patent Office: 1,803 Days
• Field of Search: None
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A first base station may perform a method for controlling handover of a terminal. The method may include setting a handover parameter that is determined based on a handover policy and transmitting a message including the handover parameter to the terminal. The handover parameter includes a service parameter. The service parameter is used when determining a handover condition of the terminal in order to induce handover from the first base station to the second base station according to the handover policy.

Claims

1. A method of controlling handover of a terminal by a first base station (BS), the method comprising:

setting a handover parameter that is determined based on a handover policy, wherein the handover policy includes information designating a network type to be used for each service type; and

transmitting a message comprising the handover parameter to the terminal,

wherein the handover parameter comprises a service parameter, and the service parameter is used when determining a handover condition of the terminal in order to induce handover from the first BS to a second BS according to the handover policy; and

wherein the service parameter includes;

a first service parameter that makes a measurement signal of the first BS, which is used when determining a first handover condition, to be smaller than a measurement value;

a second service parameter that makes a measurement signal of the first BS, which is used when determining a second handover condition, to be smaller than a measurement value; and

a third service parameter that makes a measurement signal of the second BS, which is used when determining a second handover condition, to be larger than a measurement value.

2. The method of claim 1, wherein the handover policy comprises a policy that services a first type service through a first network of the first BS and that services a second type service through a second network of the second BS.

3. The method of claim 2, wherein the service parameter is applied to a handover condition when a service executed in the terminal is the second type service.

4. A method of, by a first base station (BS), controlling handover of a terminal handed over from a second BS to the first BS, the method comprising:

completing a handover procedure with the terminal in response to a handover request that is received from the second BS;

setting a handover parameter that is determined based on a handover policy, wherein the handover policy includes information designating a network type to be used for each service type; and

transmitting a message comprising the handover parameter to the terminal,

wherein the handover parameter comprises a service parameter, and the service parameter is used when determining a handover condition of the terminal in order to induce use of a service in the first BS according to the handover policy; and

wherein the service parameter includes;

a first service parameter that makes a measurement signal of the first BS, which is used when determining a first handover condition, to be larger than a measurement value;

a second service parameter that makes a measurement signal of the first BS, which is used when determining a second handover condition, to be larger than a measurement value; and

a third service parameter that makes a measurement signal of the second BS, which is used when determining a second handover condition, to be smaller than a measurement value.

5. The method of claim 4, wherein the handover policy comprises a policy that services a first type service through a network of the first BS and that services a second type service through a network of the second BS.

6. The method of claim 5, wherein the service parameter is applied to a handover condition when a service executed in the terminal is the first type service.

7. A method of, by a first base station (BS), controlling handover of a terminal, the method comprising:

setting a service parameter that is determined based on a handover policy, wherein the handover policy includes information designating a network type to be used for each service type;

receiving a message that requests the service parameter from the terminal; and

transmitting a message comprising the service parameter to the terminal,

wherein the service parameter is used when determining a handover condition of the terminal in order to induce handover from the first BS to a second BS according to the handover policy; and

wherein the service parameter includes;

a first service parameter that makes a measurement signal of the first BS, which is used when determining a first handover condition, to be smaller than a measurement value;

a second service parameter that makes a measurement signal of the first BS, which is used when determining a second handover condition, to be smaller than a measurement value; and

a third service parameter that makes a measurement signal of the second BS, which is used when determining a second handover condition, to be larger than a measurement value.

8. The method of claim 7, wherein the handover policy comprises a policy that services a first type service through a network of the first BS and that services a second type service through a network of the second BS.

9. The method of claim 8, wherein the receiving of a message comprises receiving a message that requests the service parameter from the terminal, having executed the second type service.

10. A method of controlling handover by a terminal, the method comprising:

storing a service parameter;

determining whether to apply the stored service parameter to a handover condition based on a handover policy, wherein the handover policy includes information designating a network type to be used for each service type; and

determining, when applying the service parameter, a handover condition to which the service parameter is applied and reporting to a first base station (BS),

wherein the service parameter comprises a parameter that is used when determining a handover condition of the terminal in order to induce handover from the first BS to a second BS according to the handover policy; and

wherein the service parameter includes;

a first service parameter that makes a measurement signal of the first BS, which is used when determining a first handover condition, to be smaller than a measurement value;

a second service parameter that makes a measurement signal of the first BS, which is used when determining a second handover condition to be smaller than a measurement value; and

a third service parameter that makes a measurement signal of the second BS, which is used when determining a second handover condition, to be larger than a measurement value.

11. The method of claim 10, wherein the handover policy comprises a policy that services a first type service through a network of the first BS and that services a second type service through a network of the second BS.

12. The method of claim 11, wherein the determining of whether to apply the service parameter comprises:

determining, when a service executed in the terminal is the second type service, to apply the service parameter to a handover condition.

13. The method of claim 10, wherein the storing of a handover parameter comprises storing the handover parameter that is received from the first BS.