US 2008/0165759 A1Published application

Method and radio device for scanning a wireless communications channel

AssigneeMotorola, Inc.

InventorsHUN WENG KHOO, DARRELL STOGNER

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Abstract

The present invention switches from the TDMA non-scan channel to an RF carrier signal frequency of the scan channel. If the scan channel is unmarked, performing an inspection of activity on the scan channel in order to determine whether activity on the scan channel is addressed to the radio device, and marking the scan channel when activity on the scan channel is not addressed to the radio device. Determining whether the scan channel is active in response to determining that the scan channel is marked, unmarking the scan channel in response to determining that the scan channel is not active, and switching to the RF carrier signal of the TDMA non-scan channel, wherein the timing of the switching between the RF carrier signal frequency of the scan channel and the RF carrier signal of the non-scan channel is dependent on the timing of the designated slots of the non-scan channel.

Claims15

Dependent claims

A method of scanning a scan channel on a radio device during activity on a time division multiple access (TDMA) non-scan channel, the TDMA non-scan channel in a radio frequency (RF) carrier signal carrying periodic frames of a plurality of slots, the slots carrying respective TDMA channels, the method comprising:

switching from the TDMA non-scan channel to the RF carrier signal frequency of the scan channel;
in response to determining that the scan channel is unmarked performing an inspection of activity on the scan channel in order to determine whether activity on the scan channel is addressed to the radio device, and marking the scan channel when activity on the scan channel is not addressed to the radio device;
determining whether the scan channel is active in response to determining that the scan channel is marked;
unmarking the scan channel in response to determining that the scan channel is not active;
and
switching to the RF carrier signal of the TDMA non-scan channel;
wherein the timing of the switching between the RF carrier signal frequency of the scan channel and the RF carrier signal of the non-scan channel is dependent on the timing of the designated slots of the non-scan channel.

4 more elements

A radio device comprising:

a receiver for receiving time division multiple access (TDMA) channels in respective radio frequency (RF) carrier signals carrying periodic frames of a plurality of slots, the slots carrying respective TDMA channels;
a processor arranged to switch the receiver from receiving a TDMA non-scan channel on a said RF carrier signal to a scan channel on a different RF carrier signal;
the processor arranged to perform an inspection of activity on the scan channel in order to determine whether activity on the scan channel is addressed to the radio device in response to determining that the scan channel is unmarked, and to mark the scan channel when activity on the scan channel is not addressed to the radio device;
the processor further arranged to determine whether the scan channel is active in response to determining that the scan channel is marked;
the processor further arranged to unmark the scan channel in response to determining that the scan channel is not active;
the processor arranged to then switch to the RF carrier signal of the TDMA non-scan channel;
wherein the processor is arranged to time the switches between the RF carrier signal frequency of the scan channel and the RF carrier signal of the non-scan channel to be dependent on the timing of the designated slots of the non-scan channel.

4 more elements

Dependencies are inferred from the claim text.