Radio communication device
First Claim
1. A radio communication device which is capable of selectively operating as master terminal and slave terminal, wherein the master terminal forms a network with the slave terminal using a short range radio communication function, comprising:
- a position measuring unit which measures first positional relationship with other radio communication device;
if operating as master terminal, a switch timing judgment unit which judges timing to take over master terminal to a radio communications device operating as slave terminal based upon the first positional relationship;
if operating as master terminal, a position information requesting unit which requests each radio communication device operating as slave terminal to provide second positional relationship between the requested radio communication device operating as slave terminal and other radio communication device, and receives the second positional relationship from the radio communication device operating as slave terminal;
if operating as master terminal, a candidate radio communication device determining unit which selects a radio communication device to be operating as master terminal based upon the second positional relationship from the radio communication device operating as slave terminal; and
if operating as master terminal, an operating mode switch requesting unit which requests the selected radio communication device to operate as master terminal.
4 Assignments
0 Petitions
Accused Products
Abstract
The positional relationship between a master terminal and a slave terminal and the positional relationship of the slave terminal with the master terminal and with other slave terminals are measured, and a slave terminal subject to switching to master terminal is selected using the positional relationship. A network is then reconstructed with the slave terminal subject to switching selected in this manner as the new master terminal, and as a result the terminals forming the network prior to switching are prevented from falling outside of the communication range of the new master terminal and short range radio communication is maintained with the same terminals as those prior to switching.
33 Citations
16 Claims
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1. A radio communication device which is capable of selectively operating as master terminal and slave terminal, wherein the master terminal forms a network with the slave terminal using a short range radio communication function, comprising:
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a position measuring unit which measures first positional relationship with other radio communication device; if operating as master terminal, a switch timing judgment unit which judges timing to take over master terminal to a radio communications device operating as slave terminal based upon the first positional relationship; if operating as master terminal, a position information requesting unit which requests each radio communication device operating as slave terminal to provide second positional relationship between the requested radio communication device operating as slave terminal and other radio communication device, and receives the second positional relationship from the radio communication device operating as slave terminal; if operating as master terminal, a candidate radio communication device determining unit which selects a radio communication device to be operating as master terminal based upon the second positional relationship from the radio communication device operating as slave terminal; and if operating as master terminal, an operating mode switch requesting unit which requests the selected radio communication device to operate as master terminal. - View Dependent Claims (6, 7, 9, 11)
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2. A radio communication device which is capable of selectively operation as master terminal and slave terminal, wherein the master terminal forms a network with the slave terminal using a short range radio communication function, comprising,
a position measuring unit which measures first positional relationship with other radio communication device; -
if operating as master terminal, a switch timing judgment unit which judges timing to take over master terminal to a radio communication device operating as slave terminal based upon the first positional relationship; if operating as master terminal, a position information requesting unit which requests each radio communication device operating as slave terminal to provide second positional relationship between the requested radio communication device operating as slave terminal and other radio communication device, and receives the second positional relationship from the radio communication device operating as slave terminal; if operating as master terminal, a remaining battery measuring unit which requests a battery information to each radio communication device operating as slave terminal; if operating as master terminal, a candidate radio communication device determining unit which selects a radio communication device to be operating as a master terminal based upon the second positional relationship and the battery information; and if operating as a master terminal, an operating mode switch requesting unit which requests the selected radio communication device to operate as master terminal. - View Dependent Claims (8, 10)
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3. A radio communication device which is capable of selectively operating as master terminal and slave terminal, wherein the master terminal forms a network with the slave terminal using a short range radio communication function, comprising:
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a position measuring unit which measures first positional relationship with other radio communication device; if operating as master terminal, a switch timing judgment unit which judges timing to rake over master terminal to a radio communication device operating as slave terminal based upon the measured positional relationship; if operating as master terminal, a position information requesting unit which requests each radio communication device operating as slave terminal to provide second positional relationship between the requested radio communication device operating as slave terminal and other radio communication device, and receives the second position information from the radio communication device operating as slave terminal; if operating as master terminal, a candidate radio communication device determining unit which selects a radio communication device to be operating as master terminal based upon the second position information from the radio communication device operating as slave terminal; if operating as master terminal, an operating mode switch requesting unit which requests the selected radio communication device to operate as master terminal; if operating as slave terminal, a position information transmitting unit, which transmits the second positional relationship to the radio communication device operating as master terminal responding to the request which request the position information, and if operating as slave terminal, a communication mode switching unit which switches a operation mode from a mode operating as slave terminal to a mode operating as master. - View Dependent Claims (4, 5, 12)
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13. A radio communication device which is capable of selectively operating as master terminal and slave terminal, wherein the master terminal forms a network with the slave terminal using a short range radio communication function, comprising:
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if operating as master terminal, a substitute terminal determining unit which selects, at any timing, a destination radio communication device operating as slave terminal to which substitute designation information designating to operate as substitute master terminal is to be transmitted; if operating as master terminal, a substitute designation information transmitting unit which transmits the substitute designation information to the destination radio communication device; and if operating as master terminal, a configuration information transmitting unit which transmits network configuration information regarding a current network to the destination radio communication device; if operating as slave terminal, a reception unit which receives the substitute designation information and the network configuration information from the radio communication device operating as master terminal; if operating as slave terminal, a disconnection detecting unit which detects disconnection of the radio communication device operating as master terminal from the network flowing the reception of the substitute designation information and the network configuration information; and if operating as slave terminal, a communication mode switching unit which switches settings from a function setting for operating as slave terminal to a function setting for operating as master terminal when the disconnection of the radio communication device operating as master terminal from the network is detected by the disconnection detecting unit, whereby a communication mode is switched to operating its master terminal. - View Dependent Claims (14, 15, 16)
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Specification