Calibration procedure for wireless networks with direct mode traffic

• US 7,844,276 B2
• Filed: 09/06/2005
• Issued: 11/30/2010
• Est. Priority Date: 06/23/1999
• Status: Expired due to Term

• Current Assignee: Sony Deutschland GmbH (Sony Group Corp.)
• Original Assignee: Sony Deutschland GmbH (Sony Group Corp.)
• Inventors: Kraiem, Besma, Enderlein, Janos
• Primary Examiner(s): Ly; Nghi H
• Application Number:
  US11/220,154
• Publication Number:
  US 20060019668A1
• Time in Patent Office: 1,911 Days
• Field of Search: 455/446, 455/522, 455/69, 455/421, 370/328, 370/338
• 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. A method for performing transmission power control for wireless communications established by mobile terminals in a wireless communication network, wherein one of said mobile terminals is established as a central mobile terminal to control a direct wireless communication between the mobile terminals, the method comprising:

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

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

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

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

receiving a request message from said central mobile terminal;

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

reporting said transmission quality as quality measurement information to said central mobile terminal; and

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

3. A method for controlling mobile terminals in a direct wireless communication in a wireless communication network, wherein one of said mobile terminals is established as a central mobile terminal to control a direct wireless communication being established between mobile terminals, the method comprising:

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

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

sending control data to said first mobile terminal for controlling said first mobile terminal in accordance with said quality measurement information.

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

receiving a request message from said central mobile terminal;

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

reporting said transmission quality as quality measurement information to said central mobile terminal; and

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