Patent ID: 9386456
Filing Date: 2016-07-05
CPC Classification: H04W,Y02D

Claim Text:
1. A method for transmitting, by a first cell, an expanding request in a wireless communication system, the method comprising: transmitting an expanding request, which includes a cell off state indication which indicates the first cell is going to be turned off, and a period of a cell off timer, to a second cell; receiving an expanding request acknowledge as a response to the expanding request from the second cell; receiving an expanding start indication from the second cell when the second cell starts expanding coverage of the second cell according to the expanding request; receiving an expanding complete indication from the second cell when the second cell finishes expanding coverage of the second cell; after receiving the expanding complete indication from the second cell, starting the cell off timer at the first cell based on the period of the cell off timer; after starting the cell off timer, transmitting a cell off start indication to the second cell when the first cell starts turning off power; and after the cell off timer expires, transmitting a cell off complete indication to the second cell when the first cell finishes turning off power.