METHOD FOR HANDOVER OF MOBILE TERMINAL

• US 20130196660A1
• Filed: 01/31/2013
• Published: 08/01/2013
• Est. Priority Date: 01/31/2012
• Status: Active Grant

• Current Assignee: SungKyunKwan University's Research & Business Foundation (SungKyunKwan University)
• Original Assignee: SungKyunKwan University's Research & Business Foundation (SungKyunKwan University)
• Inventors: YOUN, HEE YONG, JEONG, HWI WOON, CHOI, JUN YEOL, KANG, HYUNG KU
• Granted Patent: US 9,037,135 B2
• Time in Patent Office: Days
• US Class Current: 455/434
• CPC Class Codes: H04W 36/165 for reducing network power consumption H04W36/18 - H04W36/22 take precedence
• CPC Class Codes: H04W 8/186 Processing of subscriber group data

Abstract

Disclosed herein is a method for handover of a mobile terminal. In the method, a group of mobile terminals for handover is formed by grouping a plurality of mobile terminals. A first terminal of the group scans a target base station. One or more other terminals of the group perform handover to the target base station using the scan information of the first terminal.

Claims

1. A method for handover of a mobile terminal, comprising:

forming a group of mobile terminals for handover by grouping a plurality of mobile terminals;

scanning, by a first terminal of the group, a target base station; and

performing, by one or more other terminals of the group, handover to the target base station using scan information of the first terminal.

2. The method of claim 1, wherein the plurality of mobile terminals includes at least one mobile terminal in a state of having information about the target base station necessary for handover (WS state), one or more mobile terminals in a state of needing to acquire the information about the target base station from the mobile terminal in WS state (WI state), and one or more mobile terminals in a normal state before handover (N state).

3. The method of claim 2, wherein in the group of mobile terminals, the at least one mobile terminal in WS state is one in number, and the one or more mobile terminals in WI state are one or more in number.

4. The method of claim 2, wherein the mobile terminal in WS state has remaining time expressed by the following Equation (a):

τ

_m=Max(θ

|S^m(θ

)=m), for m=1, 2, 3,  

 

(a)

where τ

_m is the remaining time, θ

is a random function, and S is a number of groups that maximizes a number of channel reservations.

5. The method of claim 4, wherein S is obtained by the following equation (b):

S=−

1/ln(1−

F<sub>ƒ

X(θ

)</sub>(T))  

 

(b)

where F<sub>ƒ

x(θ

)</sub>(T) is a cumulative distribution function representative of an actual probability of the mobile terminal arriving within time T.

6. The method of claim 1, wherein scanning, by the first terminal of the group, the target base station includes synchronization, ranging and certification processes that are defined in an IEEE 802.16e standard.

7. The method of claim 2, wherein the mobile terminals in WI state perform handover to the target base station using handover and channel scanning that have been performed by the mobile terminal in WS state.