Calibration procedure for wireless networks with direct mode traffic

• US 20060019668A1
• Filed: 09/06/2005
• Published: 01/26/2006
• Est. Priority Date: 06/23/1999
• Status: Active Grant

• Current Assignee: Sony Deutschland GmbH (Sony Group Corp.)
• Original Assignee: Sony Deutschland GmbH (Sony Group Corp.)
• Inventors: Kraiem, Besma, Enderlein, Janos
• Granted Patent: US 7,844,276 B2
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 17/391 Modelling the propagation channel
• CPC Class Codes: H04L 12/40052 High-speed IEEE 1394 serial bus bus transfer protocol on a daisy chain bus using an embedded synchronisation G06F13/426
• CPC Class Codes: H04L 12/40078 Bus configuration home automation networks H04L12/2803; arrangements for maintenance or administration H04L41/00
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/42 Centralised routing
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control

Abstract

A calibration procedure of wireless networks to create a topology map mainly consists of two phases: a measurement phase during which each wireless device, i. e. all mobile terminals end the central controller transmits a calibration signal in broadcast mode (S2, S3, S4) and each other wireless device measures the received signal quality and the reporting phase during which each mobile terminal reports the measured results to the central controller of the network (S6, S7). Both of these phases are preferably initiated by the central controller the measurement phase with the broadcast of a measurement control signal to all mobile terminals (S1) and the reporting phase with the broadcast of a reporting control signal to all mobile terminals (S5). Based on all measurement results the central controller creates a topology map of the network once all reports have been received. This topology map is updated in two cases, namely when a new device joins the network with a high priority calibration and when a timer expires with a low priority calibration. i. e. only when there are enough free resources.

Claims

1-19. -19. (canceled)

20. A method for performing transmission power control for wireless communications established by wireless devices in a wireless communication network, wherein one of said wireless devices is established as a central device to control a direct communication between the wireless devices, the method comprising:

sending a request message from said central wireless device to a first wireless device that is communicating with a second wireless device as said direct communication;

engaging said first wireless device to create quality measurement information concerning a quality of said direct communication and to report said quality measurement information to said central wireless device in response to said request message; and

sending control data to said first wireless device for controlling a transmit power of said direct wireless communication in accordance with said quality measurement information supplied from said wireless devices.

21. A method for controlling transmission power of a direct communication which is established between two or more wireless devices in a wireless network where there is at least one central device for facilitating said direct communication, the method comprising:

receiving a request message from said central wireless device;

measuring a transmission quality of said direct wireless communication that is established between said two or more wireless devices in response to said request message;

reporting said transmission quality as quality measurement information to said central device; and

controlling said transmission power of said direct wireless communication based on control data which is created by said central device according to said quality measurement information.

22. A method for controlling wireless devices in a direct communication in a wireless communication network, wherein one of said wireless devices is established as a central device to control a direct communication being established between wireless devices, the method comprising:

sending a request message from said central wireless device to a first wireless device that is communicating with a second wireless device in said direct communication;

engaging said first wireless device to create quality measurement information concerning quality of said direct communication and to report said quality measurement information to said central wireless device in response to said request message; and

sending control data to said first wireless device for controlling said first wireless device in accordance with said quality measurement information.

23. A method for controlling wireless devices that are in communication with each other as a direct communication in a wireless network where there is at least one central device for facilitating said direct communication, the method comprising:

receiving a request message from said central device;

measuring a transmission quality of said direct communication that is established between said wireless devices in response to said request message;

reporting said transmission quality as quality measurement information to said central device; and

controlling a process of said direct communication based on control data that is generated by said central device according to said quality measurement information.