TWI572181B - Wireless communication device applied to dual band operation and the wireless communication method using the same - Google Patents

Description

Wireless communication device suitable for dual-band operation and wireless transmission method thereof

The present invention relates to a wireless communication device for dual-band operation, and more particularly to a wireless communication device for performing uplink/downlink transmission simultaneously in dual frequency bands.

Among existing handheld devices, Wi-Fi transmission has become an indispensable communication function. Currently, the Wi-Fi operating band of the handheld terminal device is 2.4 GHz or 5 GHz. For handheld devices that conform to the 802.11a/b/g/n specification, the maximum transmission rate can reach 150 Mbps/s in the 2.4 GHz operating band or the 5 GHz operating band. However, current Wi-Fi handheld devices are only connected to one Wi-Fi wireless router and perform uplink/downlink transmission in a Time Division Duplexing (TDD) mode of operation. At this time, the Wi-Fi handheld terminal device cannot process the transmission data of the two Wi-Fi working bands at the same time. In view of this, the present invention proposes a wireless communication device to solve the above problems.

An embodiment of the present invention provides a wireless communication device suitable for dual band operation. The wireless communication device includes a dual-channel device, a microcontroller, And a signal processing circuit. The dual-channel device is configured to divide the plurality of wireless signals received by the wireless communication device into a plurality of first wireless signals in the first frequency band and a plurality of second wireless signals in the second frequency band. The microcontroller is coupled to the dual-purpose device for causing the wireless communication device to perform uplink/downlink transmission with a first wireless router and a second wireless router in full time slot. The signal processing circuit is coupled to the microcontroller and includes a first frequency band signal processing circuit and a second frequency band signal processing circuit. The first frequency band signal processing circuit receives the first wireless signals from the microcontroller, and processes the first wireless signals, so that the first wireless router and the wireless communication device perform uplink/downlink in the first frequency band. transmission. The second frequency band signal processing circuit receives the second wireless signals from the microcontroller, and processes the second wireless signals, so that the second wireless router and the wireless communication device perform uplink/downlink transmission in the second frequency band. When the wireless communication device performs downlink transmission, the microcontroller separately monitors the first frequency band signal processing circuit to process one of the first wireless signals, and the second frequency signal processing circuit processes the first error rate a second error rate of the second wireless signal; and wherein when the first error rate is greater than a predetermined value, the microcontroller lowers a working priority of the first wireless router and suspends the first wireless The router performs downlink transmission.

An embodiment of the present invention provides a wireless transmission method that operates in dual frequency bands. The wireless transmission method includes dividing a plurality of wireless signals received by a wireless communication device into a plurality of first wireless signals in a first frequency band and a plurality of second wireless signals in a second frequency band; and a first frequency band of one of the signal processing circuits The signal processing circuit processes the first wireless signals to enable a first wireless router and the wireless communication device to perform uplink/downlink transmission in the first frequency band; The second frequency band signal processing circuit of the processing circuit processes the second wireless signals, so that a second wireless router and the wireless communication device perform uplink/downlink transmission in the second frequency band; when the wireless communication device performs downlink transmission, Monitoring, by a microcontroller, the first frequency band signal processing circuit to process one of the first wireless signals, and the second frequency signal processing circuit to process one of the second wireless signals Rate; and when the first bit error rate is greater than a predetermined value, lowering a working priority of the first wireless router and suspending downlink transmission with the first wireless router.

10‧‧‧Wireless communication device

11‧‧‧First wireless router

12‧‧‧Second wireless router

101‧‧‧Antenna

102‧‧‧Dualizer

103‧‧‧Microcontroller

104‧‧‧Data buffer

105‧‧‧Signal Processing Circuit

106‧‧‧First frequency band signal processing circuit

107‧‧‧Second band signal processing circuit

108‧‧‧Processor

1051‧‧‧First digital signal processor

1052‧‧‧second digital signal processor

1053‧‧‧I/Q circuit

1054‧‧‧Data selection multiplexer

1061‧‧‧First digit analog conversion circuit

1062‧‧‧First analog-to-digital conversion circuit

1063‧‧‧First code modulation circuit

1064‧‧‧First decoding demodulation circuit

1071‧‧‧Second digital analog conversion circuit

1072‧‧‧Second analog-to-digital conversion circuit

1073‧‧‧Second code modulation circuit

1074‧‧‧Second decoding demodulation circuit

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing a wireless communication device 10 of the present invention operating in a dual band in accordance with a first embodiment of the present invention.

2 is a block diagram illustrating a signal processing circuit 105 of the present invention in accordance with a second embodiment of the present invention.

Figure 3 is a diagram showing the operation of the wireless communication device 10 in accordance with a third embodiment of the present invention.

Figure 4 is a flow chart illustrating a wireless transmission method of the present invention in accordance with a fourth embodiment of the present invention.

Embodiments or examples of the attached drawings will be described below. The scope of this disclosure is not limited to this. Those skilled in the art should be able to understand that some changes, substitutions, and substitutions may be made without departing from the spirit and structure of the disclosure. In the embodiments of the present disclosure, the component symbols may be used repeatedly, and the several embodiments of the disclosure may share the same component symbols, but are used in an embodiment. A feature element is not necessarily used in another embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing a wireless communication device 10 of the present invention operating in a dual band in accordance with a first embodiment of the present invention. In the first embodiment of the present invention, the wireless communication device 10 can perform uplink/downlink transmission with a first wireless router 11 and a second wireless router 12 in a full time slot, wherein the first wireless router 11 is connected to the wireless communication device 10 The first frequency band performs uplink/downlink transmission, and the second wireless router 12 performs uplink/downlink transmission with the wireless communication device 10 in a second frequency band. In the first embodiment of the present invention, the wireless communication device 10 is a handheld terminal device, for example, a smart phone; however, the present invention is not limited thereto, and the wireless communication device 10 can be any Wi-Fi enabled wireless communication device. In the first embodiment of the present invention, the operating frequency of the first frequency band is 2.4 GHz, and the operating frequency of the second frequency band is 5 GHz.

In the first embodiment of the present invention, the wireless communication device 10 includes an antenna 101, a duplexer 102, a microcontroller 103, a signal processing circuit 105, and a processor 108. The diplexer 102 is configured to divide the plurality of wireless signals received by the antenna 101 of the wireless communication device 10 into a plurality of first wireless signals in the first frequency band and a plurality of second wireless signals in the second frequency band. The microcontroller 103 is coupled to the dual decoder 102 and the signal processing circuit 105, respectively. The signal processing circuit 105 includes a first frequency band signal processing circuit 106 and a second frequency band signal processing circuit 107. The microcontroller 103 receives the first and second wireless signals, and transmits the first and second wireless signals to the first frequency band signal processing circuit 106 and the second frequency band signal processing circuit 107 of the signal processing circuit 105, respectively. The wireless communication device 10 can simultaneously process the wireless signals of the first and second frequency bands. The first frequency band signal processing circuit 106 receives the first wireless signals from the microcontroller 103, wherein The first frequency band signal processing circuit 106 processes the first wireless signals to enable the first wireless router 11 and the wireless communication device 10 to perform uplink/downlink transmission in the first frequency band. The second frequency band signal processing circuit 107 receives the second wireless signals from the microcontroller 103, wherein the second frequency band signal processing circuit 107 processes the second wireless signals, so that the second wireless router 12 and the wireless communication device 10 are The second frequency band performs uplink/downlink transmission. In the first embodiment of the present invention, the dual-transmitter 102 can directly transmit the first and second wireless signals to the signal processing circuit 105 without transmitting through the microcontroller 103. At this time, the microcontroller 103 is not connected to the duplexer 102 but only to the signal processing circuit 105.

Since the error rate of the signal processing circuit for processing the wireless signal is proportional to the signal strength of the wireless signal received by the wireless communication device 10, the microcontroller 103 can know the signal of the wireless signal received by the wireless communication device 10 by monitoring the error rate. Intensity, that is, the current state of the transmission channel. For example, when the microcontroller 103 detects that the error rate of the signal processing circuit processing the wireless signal becomes small (that is, when the wireless communication device 10 receives the wireless signal with a large signal strength), the wireless communication device 10 knows that Downlink transmission at a large transmission speed. On the other hand, when the microcontroller 103 detects that the error rate of the signal processing circuit processing the wireless signal becomes large (that is, when the wireless communication device 10 receives the wireless signal with a low signal strength), the wireless communication device 10 knows The transmission rate of the working frequency band in which downlink transmission is currently performed is slow.

Too low a transmission rate of the downlink transmission will cause data to wait and be congested on the wireless router side. In view of this, the wireless communication device 10 of the first embodiment of the present invention reduces the working priority of the operating frequency band whose transmission rate is too low, and uses the other working frequency band for downlink transmission (more specifically, with another wireless router. Another working frequency band is used for downlink transmission). For example, in the first embodiment of the present invention, when the wireless communication device 10 performs downlink transmission, the microcontroller 103 separately monitors the first frequency band signal processing circuit 106 to process the first error rate of one of the first wireless signals. And the second frequency band signal processing circuit 107 processes the second error rate of one of the second wireless signals. When the first error rate is greater than a predetermined value, the microcontroller 103 lowers the working priority of one of the first wireless routers 11 and suspends downlink transmission with the first wireless router 11. At this time, the wireless communication device 10 performs downlink transmission with the second wireless router 12 through the second frequency band. Then, when the first error rate is reduced from the predetermined value to less than the predetermined value, the microcontroller 103 then resets the working priority of the first wireless router 11 to an initial value, and resumes with the first wireless. The router 11 performs downlink transmission. In addition, in the first embodiment of the present invention, when the wireless communication device 10 performs downlink transmission, the microcontroller 103 can also monitor one of the first frequency bands and the first one of the second frequency bands by separately monitoring the first frequency band. The second received packet loss rate is known to the current status of the two transmission channels. By the above method of adjusting the priority of the wireless router, the wireless communication device 10 can improve the stability of the wireless router network connection.

In the first embodiment of the present invention, the microcontroller 103 further includes a data buffer 104. The data buffer 104 is used to temporarily store the plurality of packet information received by the wireless communication device 10 for downlink transmission. For example, in the first embodiment of the present invention, the data buffer 104 temporarily stores ten pieces of packet information received by the wireless communication device 10 for downlink transmission. Then, when the microcontroller 103 monitors that the first error rate is less than the predetermined value and the second error rate is less than the predetermined value, the microcontroller 103 prioritizes the second wireless router 11 and the second The work priority of the wireless router 12 is also set at the initial value, so that the micro control The controller 103 controls the wireless communication device 10 to perform downlink transmission with the first wireless router 11 and the second wireless router 12 at the same time. At this time, the microcontroller 103 further obtains an optimal time slot allocation according to the data packet information. Finally, the microcontroller 103 determines, according to the optimal time slot allocation, a first throughput rate (transmission rate) of the first wireless router 11 and a second throughput rate (transmission rate) of the second wireless router 12 when performing downlink transmission. . For example, the microcontroller 103 obtains the optimal time slot allocation according to the data packet information, and then allocates a wireless router (the first wireless router 11 or the second wireless router 12) with a large throughput rate according to the optimal time slot. Transfer more data. In other words, the microcontroller 103 obtains the maximum throughput rate (transmission rate) in a unit time slot through the optimal time slot allocation.

In the first embodiment of the present invention, the microcontroller 103 obtains the optimal time slot allocation according to two different time slot allocation algorithms. Taking the first time slot allocation algorithm as an example, each of the data packet information includes a first data amount and a second data amount. In the first embodiment of the present invention, the first time slot allocation algorithm receives the first data amount from the first wireless router 11 and the second data received from the second wireless router 12 in a fixed time slot. The amount is used as the basis for calculation. The microcontroller 103 then adjusts the first throughput rate and the second throughput rate according to the first data amount and the second data amount of each of the data packet information. In the first embodiment of the present invention, when the first data amount of the packet information is larger than the first data amount of the previous packet information and the second data amount of the data packet information is earlier than the previous data When the second amount of data of the packet information decreases, the microcontroller raises the first throughput rate and lowers the second throughput rate according to the first time slot allocation algorithm. In another embodiment of the present invention, the microcontroller 103 adjusts the average value of the ten first data amounts and the average of the ten second data amounts of the ten pieces of packet information. The first throughput rate and the second throughput rate are integrated.

In the first embodiment of the present invention, if the second time slot allocation algorithm is taken as an example, each of the data packet information includes a first time slot and a second time slot, where the first time slot is wireless. The communication device 10 receives the time slot size required for the fixed data amount of one of the first frequency bands, and the second time slot is the time slot size required for the wireless communication device 10 to receive the fixed data amount of the second frequency band. In other words, each of the packet information reflects a respective time slot required for the wireless communication device 10 to perform downlink transmission in the first and second frequency bands, respectively. The microcontroller 103 then adjusts the first throughput rate and the second throughput rate according to the first time slot and the second time slot of each of the data packet information. For example, when the first time slot of the packet information is increased from the first time slot of the previous packet information and the second time slot of the data packet information is earlier than the previous information of the data packet information When the two time slots are reduced, the microcontroller 103 lowers the first throughput rate and increases the second throughput rate according to the second time slot allocation algorithm described above. In another embodiment of the present invention, the microcontroller 103 adjusts the first throughput rate according to an average of ten first time slots and an average of ten second time slots of the ten pieces of packet information. And the second throughput rate.

2 is a block diagram illustrating a signal processing circuit 105 of the present invention in accordance with a second embodiment of the present invention. In the second embodiment of the present invention, the wireless communication device 10 performs uplink/downlink transmission with the first wireless router 11 and the second wireless router 12 in full time slots through the signal processing circuit 105. In the second embodiment of the present invention, the signal processing circuit 105 includes a first digital signal processor 1051, a second digital signal processor 1052, an I/Q circuit 1053, a data selection multiplexer 1054, and a first frequency band. The signal processing circuit 106 and the second frequency band signal processing circuit 107. In the second embodiment of the present invention, the first frequency band signal processing The circuit 106 further includes a first digital analog conversion circuit 1061, a first analog digital conversion circuit 1062, a first code modulation circuit 1063 and a first decoding demodulation circuit 1064, and a second frequency band signal processing circuit. The 107 further includes a second digital analog conversion circuit 1071, a second analog digital conversion circuit 1072, a second code modulation circuit 1073, and a second decoding demodulation circuit 1074. In the second embodiment of the present invention, the coupling relationship between the circuits of the signal processing circuit 105 has been shown in FIG. 2 and will not be repeatedly disclosed. In the second embodiment of the present invention, when performing uplink/downlink transmission, the first digital signal processor 1051, the I/Q circuit 1053, the data selection multiplexer 1054, and the first frequency band signal processing circuit 106 jointly process the first The first wireless signals of the frequency band, and the second digital signal processor 1052, the I/Q circuit 1053, the data selection multiplexer 1054, and the second frequency band signal processing circuit 107 jointly process the second of the second frequency bands Wireless signal. In the second embodiment of the present invention, the I/Q circuit 1053 has two sets of four signal pins (for example, WIFI_BB_IP, WIFI_BB_IN, WIFI_BB_QP, WIFI_BB_QN) connected to the data selection multiplexer 1054 for simultaneously processing two frequency bands ( For example, 2.4 GHz and 5 GHz data, the signal processing circuit 105 can process the first and second wireless signals simultaneously.

In the second embodiment of the present invention, the first decoding demodulation circuit 1064 and the second decoding demodulation circuit 1074 are respectively configured to perform a processing signal for the first frequency band and a processing signal for the second frequency band. Encoding operation and a modulation operation. Therefore, the microcontroller 103 can obtain the first by separately monitoring the first decoding demodulation circuit 1064 of the first band signal processing circuit 106 and the second decoding demodulation circuit 1074 of the second band signal processing circuit 107. Bit error rate and the second bit error rate. In addition, the second embodiment of the present invention can also be separately monitored by the processor 108. The first error rate when the first decoding demodulation circuit 1064 performs the decoding operation and the second error rate when the second decoding demodulation circuit 1074 performs the decoding operation are measured. In addition, it should be noted that the signal processing circuit 105 shown in FIG. 2 is only a specific embodiment, and any signal processing circuit that can simultaneously process the dual operating frequency band does not deviate from the protection scope of the present invention.

Figure 3 is a diagram showing the operation of the wireless communication device 10 in accordance with a third embodiment of the present invention. As shown in FIG. 3, when the radio communication device 10 performs downlink transmission in each slot unit, the corresponding optimal throughput (transmission rate) is obtained through the slot allocation algorithm shown in the first embodiment. As can be seen from FIG. 3, in the third embodiment of the present invention, the wireless communication device 10 can implement full-slot uplink/downlink transmission, that is, two of the first frequency band (2.4 GHz) and the second frequency band (5 GHz). Links can work at the same time. In this way, the wireless communication device 10 can not only improve the Wi-Fi transmission rate, but also ensure the stability of the wireless router network connection.

Figure 4 is a flow chart illustrating a wireless transmission method of the present invention in accordance with a fourth embodiment of the present invention. In step S401, the plurality of wireless signals received by the wireless communication device 10 are divided into a plurality of first wireless signals in the first frequency band and a plurality of second wireless signals in the second frequency band. In step S402, the first frequency signal processing circuit 106 of the signal processing circuit 105 processes the first wireless signals, so that the first wireless router 11 and the wireless communication device 10 perform uplink/downlink transmission in the first frequency band. In step S403, the second frequency signal processing circuit 107 of the signal processing circuit 105 processes the second wireless signals, so that the second wireless router 12 and the wireless communication device 10 perform uplink/downlink transmission in the second frequency band. In step S404, downlink transmission is performed in the wireless communication device 10. The first error rate of the first frequency band signal processing circuit 106 and the second error rate of the second frequency band signal processing circuit 107 are respectively monitored by the microcontroller 103. In step S405, the microcontroller 103 determines whether the first bit error rate is greater than a predetermined value. If yes, go to step S406; otherwise, go to step S407. In step S406, the microcontroller 103 lowers the working priority of one of the first wireless routers, and suspends downlink transmission with the first wireless router, and finally returns to step S405 after a fixed time slot. In step S407, the microcontroller 103 maintains the operational priority of the first wireless router 11 at an initial value, performs downlink transmission with the first wireless router 11, and finally returns to step S405 after the fixed time slot.

The present invention has been described above in terms of preferred embodiments, so that those skilled in the art can understand the present invention more clearly. However, those of ordinary skill in the art should understand that they can easily use the present invention as a basis for designing or modifying a process and using the wireless communication device suitable for dual-band operation and its wireless transmission method for the same purpose and/or The same advantages of the embodiments described herein. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Wireless communication device

11‧‧‧First wireless router

12‧‧‧Second wireless router

101‧‧‧Antenna

102‧‧‧Dualizer

103‧‧‧Microcontroller

104‧‧‧Data buffer

105‧‧‧Signal Processing Circuit

106‧‧‧First frequency band signal processing circuit

107‧‧‧Second band signal processing circuit

108‧‧‧Processor

Claims (14)

A wireless communication device suitable for dual-band operation, comprising: a dual-channel device for dividing a plurality of wireless signals received by the wireless communication device into a plurality of first wireless signals and a plurality of second frequency bands of the first frequency band a wireless controller; a microcontroller coupled to the dual-purpose device for causing the wireless communication device to perform uplink/downlink transmission with a first wireless router and a second wireless router in a full time slot, wherein the microcontroller Further comprising a buffer for temporarily storing the plurality of data packet information received by the wireless communication device for downlink transmission, the microcontroller obtaining an optimal time slot allocation according to the data packet information; and a signal processing circuit, Coupled to the microcontroller, comprising: a first frequency band signal processing circuit for receiving the first wireless signals from the microcontroller, wherein the first frequency band signal processing circuit processes the first wireless signals to enable the first a wireless router and the wireless communication device perform uplink/downlink transmission in the first frequency band; and a second frequency band signal processing circuit, receive from the microcontroller The second wireless signal, wherein the second frequency signal processing circuit processes the second wireless signals, so that the second wireless router and the wireless communication device perform uplink/downlink transmission in the second frequency band, where the wireless communication When the device performs downlink transmission, the microcontroller separately monitors the first frequency band signal processing circuit to process one of the first wireless signals, and the second frequency signal processing circuit processes one of the second wireless signals. Second bit error rate; When the first error rate is greater than a predetermined value, the microcontroller lowers the working priority of the first wireless router and suspends downlink transmission with the first wireless router. The wireless communication device applicable to dual-band operation, as described in claim 1, wherein when the first error rate is less than the predetermined value, the microcontroller determines to perform downlink transmission according to the optimal time slot allocation. The first throughput rate of one of the first wireless routers and the second throughput rate of one of the second wireless routers. The wireless communication device suitable for dual-band operation as described in claim 2, wherein each of the data packet information includes receiving a first data amount and receiving from the first wireless router in a fixed time slot. And a second data amount from the second wireless router; and wherein the microcontroller adjusts the first throughput rate and the second throughput rate according to the first data amount and the second data amount of each of the data packet information . The wireless communication device for dual-band operation as described in claim 3, wherein the first data amount of the data packet information is greater than the previous data amount of the previous data packet information and the data packet When the second amount of data of the information is less than the second amount of data of the previous packet information, the microcontroller increases the first throughput rate and lowers the second throughput rate. The wireless communication device for dual-band operation, as described in claim 2, wherein each of the data packet information includes a first time slot and a second time slot; wherein the first time slot is the wireless communication The device receives one of the first frequency bands The size of the time slot required for the fixed amount of data, and the second time slot is the size of the time slot required for the wireless communication device to receive the fixed amount of data of the second frequency band; and wherein the microcontroller is based on each of the data The first time slot and the second time slot of the packet information adjust the first throughput rate and the second throughput rate. The wireless communication device suitable for dual-band operation, as described in claim 5, wherein the first time slot of the data packet information is increased by the first time slot of the data packet information and the data packet is When the second time slot of the information is decreased from the second time slot of the previous packet information, the microcontroller lowers the first throughput rate and increases the second throughput rate. The wireless communication device suitable for dual-band operation, as described in claim 1, wherein the first wireless error rate is reduced from the predetermined value to less than the predetermined value, the microcontroller is configured to use the first wireless The working priority of the router is adjusted back to the initial value, and the downlink transmission with the first wireless router is resumed. A wireless transmission method for operating in a dual band, comprising: dividing a plurality of wireless signals received by a wireless communication device into a plurality of first wireless signals in a first frequency band and a plurality of second wireless signals in a second frequency band; Preserving the plurality of packet information received by the wireless communication device for downlink transmission; obtaining an optimal time slot allocation according to the data packet information; processing the first frequency band signal processing circuit by one of the signal processing circuits The first wireless signal enables a first wireless router to be installed with the wireless communication Positioning in the first frequency band for uplink/downlink transmission; processing, by the second frequency band signal processing circuit of the signal processing circuit, the second wireless signal, and causing a second wireless router and the wireless communication device to be in the second frequency band Performing uplink/downlink transmission; when the wireless communication device performs downlink transmission, the first frequency band processing circuit is separately monitored by a microcontroller to process a first error rate of the first wireless signal and the second frequency band The signal processing circuit processes a second error rate of one of the second wireless signals; and when the first error rate is greater than a predetermined value, lowering a working priority of the first wireless router, and suspending the first The wireless router performs downlink transmission. The wireless transmission method for dual-band operation as described in claim 8 further includes: when the first error rate is less than the predetermined value, determining, according to the optimal time slot allocation, the first when performing downlink transmission One of the wireless routers has a first throughput rate and one of the second wireless routers has a second throughput rate. A wireless transmission method for dual-band operation as described in claim 9 wherein each of the data packet information includes a first data amount received from the first wireless router and received from a fixed time slot. a second data amount of the second wireless router; and wherein the first throughput rate and the second throughput rate are adjusted according to the first data amount and the second data amount of each of the data packet information. The wireless transmission method for dual-band operation as described in claim 10, wherein the first data amount of the packet information is greater than the previous data amount of the previous packet information and the packet information is increased. The first When the amount of data is lower than the amount of the second data of the previous packet information, the first throughput rate is increased and the second throughput rate is lowered. The wireless transmission method for dual-band operation as described in claim 9 wherein each of the data packet information includes a first time slot and a second time slot; wherein the first time slot is received by the wireless communication device One of the first frequency bands fixes a time slot size required for the data amount, and the second time slot is a time slot size required by the wireless communication device to receive the fixed data amount of the second frequency band; and wherein the micro control The first throughput rate and the second throughput rate are adjusted according to the first time slot and the second time slot of each of the data packet information. The wireless transmission method for dual-band operation as described in claim 12, wherein the first time slot of the data packet information is increased by the first time slot of the data packet information and the data packet information is increased. When the second time slot is decreased from the second time slot of the previous packet information, the microcontroller lowers the first throughput rate and increases the second throughput rate. The wireless transmission method for dual-band operation as described in claim 8 , wherein when the first error rate is decreased from the predetermined value to less than the predetermined value, the work of the first wireless router is prioritized. The level is adjusted back to the initial value and the downlink transmission with the first wireless router is resumed.