Wireless Communication Terminal and Method of Controlling the Same
First Claim
1. A wireless communication terminal, which performs communication by one wireless communication system using a broadband and wide-area network where a base station broadcasts allocation information of downlink burst to a terminal belonging thereto by using an application having real time characteristic, comprises:
- a communication unit for performing communication with another wireless communication system using a wide-area network, to which network seamless handover between base stations or sectors of a base station is carried out;
a judging unit for judging, when the wireless communication terminal is performing communication by the one communication system, whether the wireless communication terminal exists at a boundary overlapped with a different sector of the base station for use in communication or at a boundary overlapped with an area of another base station or at an area fringe of the base station for use in communication not overlapped with a sector of the base station for use in communication or an area of another base station; and
a control unit for controlling, according to the application in use and the results made by the judging unit, such that a handover is performed between base stations in the one wireless communication system, or switching to the another wireless communication system is made, or simultaneous communication with the another wireless communication system is performed in order to complement the communication with the one wireless communication system, or either the uplink or the downlink is switched to the another wireless communication system.
1 Assignment
0 Petitions
Accused Products
Abstract
It is judged whether a mobile node 11 exists at a boundary A overlapped with a different sector of the base station for use in communication or at a boundary B overlapped with an area of another base station or at an area fringe C. In accordance with the application in use and the results thus judged, a handover is performed between base stations in a wireless communication system, or switching to the another wireless communication system is made, or simultaneous communication with the another wireless communication system is performed, or either the uplink or the downlink is switched to the another wireless communication system.
-
Citations
30 Claims
-
1. A wireless communication terminal, which performs communication by one wireless communication system using a broadband and wide-area network where a base station broadcasts allocation information of downlink burst to a terminal belonging thereto by using an application having real time characteristic, comprises:
-
a communication unit for performing communication with another wireless communication system using a wide-area network, to which network seamless handover between base stations or sectors of a base station is carried out; a judging unit for judging, when the wireless communication terminal is performing communication by the one communication system, whether the wireless communication terminal exists at a boundary overlapped with a different sector of the base station for use in communication or at a boundary overlapped with an area of another base station or at an area fringe of the base station for use in communication not overlapped with a sector of the base station for use in communication or an area of another base station; and a control unit for controlling, according to the application in use and the results made by the judging unit, such that a handover is performed between base stations in the one wireless communication system, or switching to the another wireless communication system is made, or simultaneous communication with the another wireless communication system is performed in order to complement the communication with the one wireless communication system, or either the uplink or the downlink is switched to the another wireless communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of controlling a wireless communication terminal, which terminal performs communication by one wireless communication system using a broadband and wide-area network where a base station broadcasts allocation information of downlink to a terminal belonging thereto by using an application having real time characteristic, comprising the steps of:
-
judging, when the wireless communication terminal is performing communication by the one communication system, whether the wireless communication terminal exists at a boundary overlapped with a different sector of the base station for use in communication or at a boundary overlapped with an area of another base station or at an area fringe of the base station for use in communication not overlapped with a sector of the base station for use in communication or an area of another base station; and controlling, according to the application in use and the results made by the judging unit, such that a handover is performed between base stations in the one wireless communication system, or switching is made to the another wireless communication system using a wide-area network performing a seamless handover between base stations or sectors of a base station, or simultaneous communication with the another wireless communication system is performed in order to complement the communication with the one wireless communication system, or either the uplink or the downlink is switched to the another wireless communication system. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A wireless communication apparatus connectable to plural wireless communication networks, comprising:
-
a handover system selection unit for selecting one of a vertical synchronization system for performing simultaneous handover of vertical links, an up/down asynchronous system for performing asynchronous handover of the vertical links, a synchronization connection bandwidth complementary system for simultaneously connecting the terminal to another wireless communication network, while maintaining connection with one wireless communication network currently in use for communication, and performing handover to the another wireless communication network with complementing an insufficient bandwidth, and an in-the-same-network switching system for performing handover from a base station or sector currently in use for connection to another base station or sector in the same wireless communication network; and a handover control unit for controllably performing handover by using the handover system selected by the handover system selection unit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A method of controlling a wireless communication apparatus connectable to plural wireless communication networks, comprising the steps of:
-
selecting a handover system from a vertical synchronization system for performing simultaneous handover of vertical links, an up/down asynchronous system for performing asynchronous handover of the vertical links, a synchronization connection bandwidth complementary system for simultaneously connecting the terminal to another wireless communication network, while maintaining connection with one wireless communication network currently in use for communication, and performing handover to the another wireless communication network with complementing an insufficient bandwidth, and an in-the-same-network switching system for performing handover from a base station or sector currently in use for connection to another base station or sector in the same wireless communication network; and controllably performing handover by using the handover system thus selected.
-
Specification