Channel selection in wireless telecommunication system

• US 20040218562A1
• Filed: 03/04/2004
• Published: 11/04/2004
• Est. Priority Date: 03/07/2003
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Nokia Corporation
• Inventors: Posti, Jarkko, Orava, Pekko
• Granted Patent: US 7,720,029 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 1/109 by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04W 36/20 for optimising the interference level
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

The invention relates to channel selection in a wireless telecommunication system. The method comprises determining at least one transmission frequency used by first transceiver means from information on the first transceiver means. The harmonics of the transmission frequency are determined and at least one channel used by the second transceiver means is selected by at least taking into account the harmonics of the transmission frequency of the first transceiver means.

Claims

1. A method of channel selection in a wireless terminal comprising first transceiver means and second transceiver means, the method comprising:

determining at least one transmission frequency from information on the first transceiver means,

specifying a harmonic of at least one transmission frequency, and

selecting at least one channel for use in the second transceiver means by at least taking into account the harmonic determined.

2. A method as claimed in claim 1, wherein an inquiry is submitted from the second transceiver means to the first transceiver means about the frequencies used,

information about at least one transmission frequency of the first transceiver means is sent to the second transceiver means, and

the harmonics are determined in the second transceiver means.

3. A method as claimed in claim 1, wherein information about the transmission frequency of at least one channel is sent from first transceiver means to the second transceiver means in response to a change in the transmission frequency and/or the transmit power.

4. A method as claimed in claim 1, wherein a change of the channel used by the second transceiver means is initiated in response to a harmonic of at least one transmission frequency of the first transceiver means residing on the current receive channel used by the second transceiver means.

5. A method as claimed in claim 1, wherein at least one channel is selected for use in the second transceiver means such that no harmonics of the transmit frequencies of the first transceiver means exist in the frequency range of the channel.

6. A method as claimed in claim 5, wherein the transmit frequencies of the access points capable of serving the second transceiver means are checked,

an access point at whose transmission frequency no harmonics of the first transceiver means reside is selected, and

a connection is set up to the access point.

7. A method as claimed in claim 1, wherein distances between the frequencies of the channels available to the second transceiver means and the harmonics of at least one transmission frequency of the first transceiver means are determined, and

the channels available to the second transceiver means based on the distances determined are preferred when selecting the channel to be used.

8. A transceiver unit for a wireless terminal, wherein the transceiver unit is configured to receive information about at least one transmission frequency or a harmonic of at least one transmission frequency used by another transceiver, and

the transceiver unit is configured to select at least one channel to be used in the transceiver unit by at least taking into account the harmonics determined.

9. A wireless terminal comprising first transceiver means and second transceiver means, wherein the wireless terminal is configured to determine at least one transmission frequency used in the first transceiver means,

the wireless terminal is configured to determine a harmonic of at least one transmission frequency, and

the wireless terminal is configured to select at least one channel to be used for the second transceiver means by at least taking into account the harmonic determined.