H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/26 (2006.01) H04Q 7/22 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2105265
In the selection of a control channel of a mobile station in a radio zone to which some control channels are assigned as communication channels, the receiving levels of the control channels are sequentially measured and control channel candidates are selected. A check is made to see if a control signal can correctly be received in each of the selected control channel candidates, and if not, the number of signal reception failures in that channel is incremented by 1 in a memory used by the mobile station. A channel in which the number of signal reception failures has reached a predetermined value M (an integer equal to or greater than 1) is excluded from the group of control channel candidates, and the other selected control channel candidates are similarly checked to determine whether or not the reception of the control signal is possible in each of them. If the control signal can correctly be received in a given control channel, a check is made to see if the mobile station has moved into a different radio zone, and if not, the mobile station enters the state of waiting for an incoming call in that control channel. If the radio zone of the mobile station has changed, the numbers of signal reception failures in all the control channels are reset in the memory, so that all the control channels are made candidates to be selected next as a control channel of the radio zone in which the mobile station is currently located.
Kobayashi Katsumi
Nagata Kiyohito
Yunoki Kazufumi
Kirby Eades Gale Baker
Ntt Mobile Communications Network Inc.
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