Method and system for adjusting communication channel based on signal scan result
The disclosure is related to a method and a system for adjusting a communication channel based on a signal scan result. The system includes wireless gateway modules, a wireless transceiver module and a control circuit. The control circuit determines whether or not the wireless transceiver module conducts any transmission task. The wireless transceiver module is activated to scan signals over a selected frequency when it is available. Multiple scan results can be obtained when the scanning process is repeatedly conducted in different frequencies. Signal information is recorded in a signal scan table. Thus, if the system determines the frequency needs to be adjusted based on a transmission status, one of the frequencies recorded in the table can be chosen and set for the wireless gateway module and a transmission frequency for a terminal node is modified.
1. A communication method for adjusting a channel based on a signal scan result, adapted to a communication system including one or more wireless gateway modules that receive signals from terminal nodes through a multi-channel technology, a wireless transceiver module used to transmit signals, and a control circuit that connects with the one or more wireless gateway modules and the wireless transceiver module via a connection circuit, wherein the communication method comprises:
selecting a frequency by the control circuit when the wireless transceiver module does not perform any transmission instruction and driving the wireless transceiver module to scan a space with the selected frequency so as to produce a scan result; and
repeatedly selecting other frequencies to scan the space for producing a plurality of scan results, and recording signal information therein to a signal scan table;
wherein, the wireless gateway module is an LoRa concentrator and the wireless transceiver module is an LBT module supporting LoRa communication; in the communication system, the LBT module processes signals received by the one or more LoRa concentrators through the control circuit the LoRa concentrator in the communication system is configured to be a one-way receiver that is cooperated with the LBT module that is configured to be a one-way transmitter; when the communication system uses the control circuit to determine that a transmission frequency is required to be adjusted according to a transmission status, one of the frequencies recorded in the signal scan table is selected to be the transmission frequency for one of the wireless gateway modules.
2. The method as recited in claim 1 , wherein, when the control circuit determines that the wireless transceiver module is performing the transmission instruction, the wireless transceiver module does not perform tasks of frequency selection and signal scan but performs the transmission instruction.
3. The method as recited in claim 1 , wherein the signal scan table is stored in a memory of the control circuit or in a backhaul network server via a network.
4. The method as recited in claim 1 , wherein the communication system determines whether or not the transmission frequency needs to be adjusted according to one or both of a packet loss rate and a packet transmission rate of the wireless gateway module.
5. The method as recited in claim 4 , wherein, when the control circuit determines that the wireless transceiver module is performing the transmission instruction, the wireless transceiver module does not perform tasks of frequency selection and signal scan but performs the transmission instruction.
6. The method as recited in claim 1 , wherein, when the transmission frequency of the wireless gateway module is set, frequency information of the one or more terminal nodes is modified.
7. The method as recited in claim 6 , wherein, when the control circuit determines that the wireless transceiver module is performing the transmission instruction, the wireless transceiver module does not perform tasks of frequency selection and signal scan but performs the transmission instruction.
8. A communication system, comprising:
one or more wireless gateway modules, connected with one or more terminal nodes by a multi-channel technology to receive signals from the one or more terminal nodes;
a wireless transceiver module used to transmit signals; and
a control circuit connected with the one or more wireless gateway modules and the wireless transceiver module via a connection circuit and performing a communication method for channel adjustment based on a signal scan result, wherein the communication method includes:
selecting a frequency by the control circuit when the wireless transceiver module does not perform any transmission instruction and driving the wireless transceiver module to scan a space with the selected frequency so as to produce a scan result; and
repeated selecting other frequencies to scan the space for producing a plurality of scan results, and recording the signal information therein to a signal scan table;
wherein, the wireless gateway module is an LoRa concentrator and the wireless transceiver module is an LBT module supporting LoRa communication; in the communication system, the LBT module processes signals received by the one or more LoRa concentrators through the control circuit the LoRa concentrator in the communication system is configured to be a one-way receiver that is cooperated with the LBT module that is configured to be a one-way transmitter; when the communication system uses the control circuit to adjust a transmission frequency according to a transmission status, one of the frequencies recorded in the signal scan table is selected to be the transmission frequency for one of the wireless gateway modules, and frequency information of the one or more terminal nodes is modified.
9. The system as recited in claim 8 , wherein, when the control circuit determines that the wireless transceiver module is performing the transmission instruction, the wireless transceiver module does not perform tasks of frequency selection and signal scan but performs the transmission instruction.
10. The system as recited in claim 8 , wherein the communication system determines whether or not the transmission frequency needs to be adjusted according to one or both of a packet loss rate and a packet transmission rate of the wireless gateway module.
11. The system as recited in claim 8 , wherein the communication system is connected with a backhaul network server via a network, and the signal scan table is stored in the backhaul network server via the network.
12. The system as recited in claim 11 , wherein the backhaul network server is connected with a plurality of communication systems via the network and records the signal scan table of each of the communication systems.
13. The system as recited in claim 12 , wherein, when the control circuit determines that the wireless transceiver module is performing the transmission instruction, the wireless transceiver module does not perform tasks of frequency selection and signal scan but performs the transmission instruction.