Communication terminal device

• US 20050281234A1
• Filed: 06/08/2005
• Published: 12/22/2005
• Est. Priority Date: 06/18/2004
• Status: Abandoned Application

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Kawamura, Yuzuru, Nishimura, Takuya, Oura, Satoshi
• Application Number:
  US11/147,776
• Publication Number:
  US 20050281234A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A communication terminal device includes a wireless LAN module configured to search a plurality of communication channels by channel scanning in order to find a communication channel available for communication and configured to perform wireless communication using the found communication channel through a wireless LAN. In a search process by channel scanning for searching for the communication channel available for communication, if the communication channel available for communication is not found within a predetermined time period from the beginning of the search process, the wireless LAN module stops the search process, and an operation mode of the wireless LAN module is shifted from a normal operation mode to a power-saving mode.

Claims

1. A communication terminal device comprising:

a wireless local-area network (LAN) module configured to search a plurality of communication channels by channel scanning in order to find a communication channel available for communication and configured to perform wireless communication using the found communication channel through a wireless LAN,

wherein, in a search process by channel scanning for searching for the communication channel available for communication, if the communication channel available for communication is not found within a predetermined time period from the beginning of the search process, the wireless LAN module stops the search process, and an operation mode of the wireless LAN module is shifted from a normal operation mode to a power-saving mode.

2. The communication terminal device according to claim 1, wherein the power-saving mode is a mode in which power is not supplied to a radio-frequency (RF) unit in the wireless LAN module.

3. The communication terminal device according to claim 1, wherein the power-saving mode is a mode in which power is not supplied to each unit, including a radio-frequency (RF) unit, in the wireless LAN module.