CN112770300A - Wireless communication device - Google Patents
Wireless communication device Download PDFInfo
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- CN112770300A CN112770300A CN201911070108.7A CN201911070108A CN112770300A CN 112770300 A CN112770300 A CN 112770300A CN 201911070108 A CN201911070108 A CN 201911070108A CN 112770300 A CN112770300 A CN 112770300A
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- bluetooth
- wireless
- transceiver
- channel
- center frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
Abstract
The invention discloses a wireless communication device, one embodiment of which comprises a wireless transceiver, a Bluetooth transceiver and a Bluetooth controller. The wireless transceiver supports at least one wireless communication specification (e.g., at least one of a number of IEEE 802.11 specifications) and communicates wirelessly over a wireless channel for a period of time. The Bluetooth transceiver carries out Bluetooth communication through a plurality of Bluetooth channels in sequence in the period of time, the Bluetooth controller judges that the center frequency difference between the wireless channel and a Bluetooth channel falls in one of N preset intervals, and controls the Bluetooth transceiver to use one of N groups of parameters according to the center frequency difference.
Description
Technical Field
The present invention relates to a wireless communication device, and more particularly, to a wireless communication device supporting wireless lan communication and bluetooth communication.
Background
When a Bluetooth (BT) transceiver and a Wi-Fi transceiver of the same device coexist in the 2.4GHz band at the same time, they may interfere with each other, which may result in an increased transmission error rate. There are several ways to reduce the conflict between BT transceivers and Wi-Fi transceivers:
firstly, the operating states of the BT transceiver and the Wi-Fi transceiver are exchanged to allocate the time when the BT transceiver and the Wi-Fi transceiver use the same frequency band. If the Wi-Fi transceiver needs to receive the packet, the BT transceiver stops sending signals. If the BT transceiver has a packet with high priority to be received, the Wi-Fi transceiver stops sending signals; if the packet to be received by the BT transceiver is a packet which can generally accept retransmission, the BT transceiver waits for the neutral position of the Wi-Fi transceiver to receive the packet again. The disadvantage of this approach is that only one party can receive or transmit signals in the same frequency band at the same time, which reduces the throughput (throughput) of both parties.
And secondly, the influence on the Wi-Fi transceiver is reduced by adjusting the signal strength of the transmitting end of the BT transceiver or adjusting the parameter of the receiving end. If the BT transceiver knows that the Wi-Fi transceiver is receiving signals, the BT transceiver weakens the signal strength of the transmitting end of the BT transceiver so as to reduce the influence on the Wi-Fi receiving end; if the BT transceiver knows that the Wi-Fi transceiver is transmitting, the BT transceiver reduces its receiver sensitivity (sensitivity) to avoid over-amplifying the interference component from the Wi-Fi transceiver in the signal received by the receiver of the BT transceiver. Since the above-mentioned method only performs non-differential adjustment according to whether the Wi-Fi transceiver is receiving/transmitting signals, the interference level between the BT transceiver and the Wi-Fi transceiver is not considered, and therefore, on average, this method may cause the reception failure rate of the remote BT device (which is an on-line object of the BT transceiver) to increase, or cause the sensitivity of the receiving end of the BT transceiver to decrease.
Disclosure of Invention
An objective of the present invention is to provide a wireless communication device to increase the success rate of bluetooth communication.
An embodiment of the wireless communication device of the present invention includes a wireless transceiver, a bluetooth transceiver, and a bluetooth controller. The wireless transceiver is configured to wirelessly communicate over a wireless channel for a period of time and is operable to support at least one wireless communication specification (e.g., at least one of a number of IEEE 802.11 specifications). The bluetooth transceiver is used for carrying out bluetooth communication through a plurality of bluetooth channels in sequence in the period of time, wherein the plurality of bluetooth channels comprise a first bluetooth channel and a second bluetooth channel. The Bluetooth controller is used for judging that the difference between the center frequency of the wireless channel and the center frequency of the first Bluetooth channel is within one of N preset intervals, and controlling the Bluetooth transceiver to use one of N groups of parameters according to the difference so as to enable the Bluetooth transceiver to carry out Bluetooth communication through the first Bluetooth channel within the period of time; the bluetooth controller is further configured to determine that a difference between a center frequency of the wireless channel and a center frequency of the second bluetooth channel falls within one of the N preset intervals, and accordingly control the bluetooth transceiver to use one of the N sets of parameters, so that the bluetooth transceiver performs the bluetooth communication via the second bluetooth channel within the period of time. In this embodiment, the wireless transceiver and the bluetooth transceiver use the same frequency band for simultaneous communication during the period of time, and N is an integer greater than one.
The features, operation and efficacy of the present invention will now be described in detail in connection with the preferred embodiments with reference to the accompanying drawings.
Drawings
FIG. 1 illustrates an embodiment of a wireless communication device of the present invention;
FIG. 2 is a schematic diagram of the wireless transceiver and the Bluetooth transceiver of FIG. 1 using a wireless channel and a first Bluetooth channel, respectively, for communication;
FIG. 3 is a schematic diagram of the wireless transceiver and Bluetooth transceiver of FIG. 1 using a wireless channel and a second Bluetooth channel, respectively, for communication;
FIG. 4 shows a schematic diagram of one embodiment of the Bluetooth transceiver of FIG. 1;
FIG. 5 shows the Bluetooth signal strength when the difference between the center frequency of the wireless channel and the center frequency of the first Bluetooth channel falls within a first interval; and
FIG. 6 shows the intensity of the Bluetooth signal when the difference between the center frequency of the wireless channel and the center frequency of the first Bluetooth channel falls within a second interval.
Detailed Description
The present disclosure includes a wireless communication device (e.g., a mobile phone, a personal computer, a wearable electronic device) capable of adaptively adjusting parameters of a Bluetooth (BT) transceiver according to a center frequency difference between a wireless channel and a BT channel to increase a success rate of Bluetooth communication.
Fig. 1 shows an embodiment of a wireless communication device according to the present invention. The Wireless communication device 100 of fig. 1 includes a Wireless transceiver 110, a bluetooth transceiver 120, and a bluetooth controller 130, wherein the Wireless transceiver 110 is wirelessly connected to a Wireless device (e.g., a Wireless Local Area Network (WLAN) device such as an Access Point (AP)) 10 via an antenna (not shown), and the bluetooth transceiver 120 is wirelessly connected to a bluetooth device (e.g., a bluetooth speaker) 20 via the antenna (not shown). In the embodiment of fig. 1, the bluetooth controller 130 is integrated into the bluetooth transceiver 120, and the wireless transceiver 110, the bluetooth transceiver 120, and the bluetooth controller 130 are included in a single integrated circuit; in another embodiment, the bluetooth controller is integrated into the bluetooth transceiver, and the wireless transceiver and the bluetooth transceiver are separate integrated circuits; in another embodiment, the bluetooth controller is separate from the bluetooth transceiver, and the wireless transceiver, the bluetooth transceiver and the bluetooth controller are separate integrated circuits.
Referring to fig. 1-3, fig. 2 shows the wireless transceiver 110 and the bluetooth transceiver 120 of fig. 1 respectively using wireless channels CHWLANWith a first Bluetooth channel CHBT1To communicate, FIG. 3 shows the wireless transceiver 110 and the Bluetooth transceiver 120 of FIG. 1 using wireless channels CHWLANWith a second Bluetooth channel CHBT2To communicate. The wireless transceiver 110 is used for a period of time via a wireless channel CHWLANPerforming wireless communication; the operation of the wireless transceiver 110 supports at least one wireless communication specification (e.g., at least one of a series of IEEE 802.11 specifications, such as 802.11b, 802.11g, and 802.11n, or a Long Term Evolution (LTE) specification). The bluetooth communication has a frequency hopping (frequency hopping) characteristic, so the bluetooth transceiver 120 is used for sequentially performing bluetooth communication via a plurality of bluetooth channels including a first bluetooth channel CH during the same period of timeBT1With a second Bluetooth channel CHBT2(ii) a The characteristics of the above hopping frequencies can be found in the following documents: bluetooth SIG Proprietary, "Volume 1, Part A, Section 1.1,1.2and Volume 2, Part B, Section 2.6of Bluetooth Core Specification Version 5.0", Dec 062016.
Please refer to fig. 1-3. The Bluetooth controller 130 is used to determine the wireless channel CHWLANA center frequency and the first Bluetooth channel CHBT1The difference of the center frequencies falls within a P-th interval of the N preset intervals, and accordingly controls the Bluetooth transceiver 120 to use a X-th set of parameters of N sets of parameters (for example, each set of parameters includes parameters of amplification Gain of the Bluetooth transmitting circuit and/or parameters of Automatic Gain Control (AGC) of the Bluetooth receiving circuit), so that the Bluetooth transceiver 120 passes through the first Bluetooth channel CH within the period of timeBT1Carrying out Bluetooth communication; the Bluetooth controller 130 is further used to determine the wireless channel CHWLANA center frequency and the second Bluetooth channel CHBT2The difference of the center frequencies falls within a Q-th interval of the N preset intervals, and accordingly, the Bluetooth transceiver 120 is controlled to use a Y-th parameter of the N parameters, so that the Bluetooth transceiver 120 passes through the second Bluetooth channel CH within the period of timeBT2Performing Bluetooth communication, wherein N is an integer greater than one (e.g., N is not less than 3), and each of the P, Q, X, Y is a positive integer not greater than N. The wireless transceiver 110 and the Bluetooth transceiver 120 use the same frequency Band (e.g., 2.4GHz Band of ISM Band) for the time period to communicate simultaneously, and the wireless channel CHWLANMay or may not overlap with any of the plurality of bluetooth channels.
Referring to fig. 4, the bluetooth transceiver 120 includes a bluetooth transmitting circuit 410 and a bluetooth receiving circuit 420. Referring to fig. 1, 2and 4, in controlling bluetooth transmissions, when the wireless channel CH is usedWLANA center frequency and the first Bluetooth channel CHBT1When the difference of the center frequencies falls within a first interval of the N predetermined intervals, the Bluetooth controller 130 controls the Bluetooth transceiver 120 (e.g., the Bluetooth transmitting circuit 410 of the Bluetooth transceiver 120) to use a first set of parameters (e.g., the amplification gain of the Bluetooth transmitting circuit 410) of the N sets of parameters; when the wireless channel CH isWLANA center frequency and the first Bluetooth channel CHBT1When the difference of the center frequencies falls within a second interval of the N predetermined intervals, the Bluetooth controller 130 controls the Bluetooth transceiver 120 (e.g., the Bluetooth transmitting circuit 410 of the Bluetooth transceiver 120) to use the N sets of parametersA second set of parameters (e.g., parameters of amplification gain of the bluetooth transmit circuitry 410). Any frequency in the first interval and the wireless channel CHWLANThe difference between the center frequency of the first interval and the center frequency of the second interval is smaller than that between any frequency in the second interval and the wireless channel CHWLANA difference in center frequency; in other words, when the difference of the center frequencies falls within the first interval but not the second interval, the wireless channel CHWLANA center frequency and the first Bluetooth channel CHBT1The center frequencies of the two are closer. The strength of a transmitted signal of the Bluetooth transceiver 120 using the first set of parameters (as shown in FIG. 5, where F1And F2To set the frequency values of the first and second intervals) is less than the strength of the transmitted signal of the bluetooth transceiver using the second set of parameters (as shown in fig. 6, where F is1And F2For setting the frequency values of the first and second intervals), so that when the difference of the center frequencies falls in the first interval, the first set of parameters is used to avoid the bluetooth transmission operation of the bluetooth transceiver 120 from causing excessive interference to the wireless receiving operation or the wireless transmitting operation of the wireless transceiver 110; when the difference of the center frequencies falls within the second interval, the second set of parameters is used to prevent the transmitted signal of the bluetooth transceiver 120 from being attenuated excessively, thereby increasing the receiving success rate of the remote bluetooth device (which is the connected object of the bluetooth transceiver 120). Referring to fig. 1, 3 and 4, similarly, in controlling bluetooth transmission, the bluetooth controller 130 is according to the wireless channel CHWLANA center frequency and the second Bluetooth channel CHBT2To control the bluetooth transceiver 120 to use one of the N sets of parameters; since those skilled in the art can understand how the bluetooth controller 130 controls the bluetooth transceiver 120 to use one of the N sets of parameters according to the foregoing description, the repeated and redundant descriptions are omitted here. It is noted that the N sets of parameters for the coexistence of the bluetooth transmission operation and the wireless reception operation may be the same as or different from the N sets of parameters for the coexistence of the bluetooth transmission operation and the wireless transmission operation. It is noted that although fig. 2-3 and 5-6 show the center frequency of the wireless channel being greater than the center frequency of the bluetooth channel, other implementations may be usedIn this example, the center frequency of the bluetooth channel may be greater than the center frequency of the wireless channel; in view of the above, on the premise that the absolute value of the difference between the center frequency of the wireless channel and the center frequency of the bluetooth channel is the same, the two cases, i.e. the case where the center frequency of the wireless channel is greater than the center frequency of the bluetooth channel and the case where the center frequency of the wireless channel is less than the center frequency of the bluetooth channel, can be determined to fall within the same interval or different intervals of the N preset intervals according to implementation requirements, so as to use the same set of parameters or different sets of parameters.
Referring to fig. 1, 2and 4, in controlling bluetooth reception, when the wireless channel CH is usedWLANA center frequency and the first Bluetooth channel CHBT1When the difference of the center frequencies falls within a first interval of the N predetermined intervals, the Bluetooth controller 130 controls the Bluetooth transceiver 120 (e.g., the Bluetooth receiving circuit 420 of the Bluetooth transceiver 120) to use a first set of parameters (e.g., the parameters of the automatic gain control of the Bluetooth receiving circuit 420) of the N sets of parameters; when the wireless channel CH isWLANA center frequency and the first Bluetooth channel CHBT1When the difference of the center frequencies falls within a second interval of the N predetermined intervals, the bluetooth controller 130 controls the bluetooth transceiver 120 (e.g., the bluetooth receiving circuit 420 of the bluetooth transceiver 120) to use a second set of parameters (e.g., the parameters of the automatic gain control of the bluetooth receiving circuit 420) of the N sets of parameters. Any frequency in the first interval and the wireless channel CHWLANThe difference between the center frequency of the first interval and the center frequency of the second interval is smaller than that between any frequency in the second interval and the wireless channel CHWLANA difference in center frequency; in other words, when the difference of the center frequencies falls within the first interval but not the second interval, the wireless channel CHWLANA center frequency and the first Bluetooth channel CHBT1The center frequencies of the two are closer. The amplification gain of a received signal of the Bluetooth transceiver 120 using the first set of parameters is smaller than the amplification gain of the received signal of the Bluetooth transceiver 120 using the second set of parameters, so that when the difference of the center frequencies falls in the first interval, the use of the first set of parameters can prevent the sensitivity of the Bluetooth receiving operation of the Bluetooth transceiver 120 from being too high, thereby preventing the over-amplification sourceSignal interference from wireless transmission operations at the wireless transceiver 110; when the difference of the center frequencies falls within the second interval, the second set of parameters is used to avoid the sensitivity of the bluetooth receiving operation of the bluetooth transceiver 120 from being too low, so as to increase the receiving success rate of the bluetooth transceiver 120. Referring to fig. 1, 3 and 4, similarly, in controlling bluetooth reception, the bluetooth controller 130 similarly depends on the wireless channel CHWLANA center frequency and the second Bluetooth channel CHBT2To control the bluetooth transceiver 120 to use one of the N sets of parameters; since those skilled in the art can understand how the bluetooth controller 130 controls the bluetooth transceiver to use one of the N sets of parameters according to the foregoing description, the repeated and redundant descriptions are omitted here. It is noted that the N sets of parameters for the coexistence of the bluetooth reception operation and the wireless transmission operation may be the same as or different from the N sets of parameters for the coexistence of the bluetooth transmission operation and the wireless transmission (or reception) operation.
It should be noted that the exchange of the operating states of the bluetooth transceiver 120 and the wireless transceiver 110 (including the center frequency of the channel) is a known technique (for example, the chinese patent application (application No. 107100083) of the applicant, the operating states are known by firmware communication or hardware communication, or the channel used by the wireless transceiver 110 is known by detection), and the details thereof are omitted here. It should be noted that the wireless transceiver 110 does not change channels frequently to communicate with the same wireless device 10 under a stable wireless connection environment, and therefore, in the above embodiment, the wireless transceiver 110 usually communicates with the same wireless device 10 through the same wireless channel CH during the period of timeWLANTo communicate with the wireless device 10; however, even if the wireless transceiver 110 first passes through the wireless channel CH during the period of timeWLANCommunicate with the wireless device 10 via another wireless channel, and the bluetooth controller 130 still follows the original wireless channel CH within the periodWLANControls the bluetooth transceiver 120 regardless of the center frequency of the other wireless channel, and then the bluetooth controller 130 receives updated information of the communication channel between the wireless transceiver 110 and the wireless device 10The bluetooth controller 130 controls the bluetooth transceiver 120 according to the updated information.
It is to be noted that, when the implementation is possible, a person skilled in the art may selectively implement some or all of the technical features of any one of the foregoing embodiments, or selectively implement a combination of some or all of the technical features of the foregoing embodiments, thereby increasing the flexibility in implementing the invention.
In summary, the present invention can adaptively adjust the parameters of the BT transceiver according to the difference between the center frequencies of a wireless channel and a bluetooth channel, so that the present invention can reduce the interference to the communication of the wlan and increase the success rate of the bluetooth communication.
Although the embodiments of the present invention have been described above, these embodiments are not intended to limit the present invention, and those skilled in the art can make variations on the technical features of the present invention according to the explicit or implicit contents of the present invention, and all such variations may fall within the scope of the patent protection sought by the present invention.
[ notation ] to show
100 radio communication device
110 wireless transceiver
120 bluetooth transceiver
130 bluetooth controller
10 radio device
20 Bluetooth device
CHWLANWireless channel
CHBT1First bluetooth channel
CHBT2Second bluetooth channel
410 bluetooth transmitting circuit
420 bluetooth receiving circuit
F1、F2The frequency value.
Claims (10)
1. A wireless communication device, comprising:
a wireless transceiver for wireless communication over a wireless channel for a period of time, the wireless transceiver being operable to support at least one wireless communication specification;
a bluetooth transceiver for sequentially performing bluetooth communication via a plurality of bluetooth channels during the period of time, wherein the plurality of bluetooth channels include a first bluetooth channel and a second bluetooth channel; and
a Bluetooth controller for determining that the difference between the center frequency of the wireless channel and the center frequency of the first Bluetooth channel is within one of N preset intervals, and controlling the Bluetooth transceiver to use one of N sets of parameters to enable the Bluetooth transceiver to perform the Bluetooth communication via the first Bluetooth channel within the period of time, and for determining that the difference between the center frequency of the wireless channel and the center frequency of the second Bluetooth channel is within one of the N preset intervals, and controlling the Bluetooth transceiver to use one of the N sets of parameters to enable the Bluetooth transceiver to perform the Bluetooth communication via the second Bluetooth channel within the period of time,
wherein the wireless transceiver and the bluetooth transceiver use the same frequency band for simultaneous communication during the period of time, and N is an integer greater than one.
2. The wireless communication device as claimed in claim 1, wherein the bluetooth controller controls the bluetooth transceiver to use a first set of the N sets of parameters when a difference between a center frequency of the wireless channel and a center frequency of the first bluetooth channel falls within a first interval of the N preset intervals, and controls the bluetooth transceiver to use a second set of the N sets of parameters when a difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel falls within a second interval of the N preset intervals; the difference between any frequency in the first interval and the center frequency of the wireless channel is smaller than the difference between any frequency in the second interval and the center frequency of the wireless channel; the strength of a transmitted signal of the Bluetooth transceiver using the first set of parameters is less than the strength of the transmitted signal of the Bluetooth transceiver using the second set of parameters.
3. The wireless communication device of claim 2, wherein the bluetooth transceiver comprises:
a bluetooth transmitting circuit, wherein when the difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel is in the first interval and the wireless transceiver performs a wireless receiving operation and the bluetooth transceiver performs a bluetooth transmitting operation, the bluetooth controller controls the bluetooth transmitting circuit to adjust the intensity of the transmitted signal by using the first set of parameters; when the difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel falls in the second interval and the wireless transceiver performs the wireless receiving operation and the bluetooth transceiver performs the bluetooth transmitting operation, the bluetooth controller controls the bluetooth transmitting circuit to use the second set of parameters to adjust the intensity of the transmitted signal.
4. The wireless communication device of claim 2, wherein the bluetooth transceiver comprises:
a bluetooth transmitting circuit, wherein when the difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel is in the first interval and the wireless transceiver performs a wireless transmitting operation and the bluetooth transceiver performs a bluetooth transmitting operation, the bluetooth controller controls the bluetooth transmitting circuit to adjust the intensity of the transmitted signal by using the first set of parameters; when the difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel falls within the second interval and the wireless transceiver performs the wireless transmission operation and the bluetooth transceiver performs the bluetooth transmission operation, the bluetooth controller controls the bluetooth transmission circuit to adjust the strength of the transmission signal by using the second set of parameters.
5. The wireless communication device as claimed in claim 1, wherein the bluetooth controller controls the bluetooth transceiver to use a first set of the N sets of parameters when a difference between a center frequency of the wireless channel and a center frequency of the first bluetooth channel falls within a first interval of the N preset intervals, and controls the bluetooth transceiver to use a second set of the N sets of parameters when a difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel falls within a second interval of the N preset intervals; the difference between any frequency in the first interval and the center frequency of the wireless channel is smaller than the difference between any frequency in the second interval and the center frequency of the wireless channel; the amplification gain of a received signal of the Bluetooth transceiver using the first set of parameters is less than the amplification gain of the received signal of the Bluetooth transceiver using the second set of parameters.
6. The wireless communication device of claim 5, wherein the Bluetooth transceiver comprises:
a bluetooth receiving circuit, wherein when the difference between the center frequency of the wireless channel and the center frequency of the first bluetooth channel falls within the first interval and the wireless transceiver performs a wireless transmitting operation and the bluetooth transceiver performs a bluetooth receiving operation, the bluetooth controller controls the bluetooth receiving circuit to adjust the amplification gain of the received signal by using the first set of parameters; when the difference between the center frequency of the wireless channel and the center frequency of the first Bluetooth channel falls in the second interval and the wireless transceiver performs the wireless transmitting operation and the Bluetooth transceiver performs the Bluetooth receiving operation, the Bluetooth controller controls the Bluetooth receiving circuit to use the second set of parameters to adjust the amplification gain of the received signal.
7. The wireless communication device of claim 1, wherein the same frequency band is a 2.4GHz band of an ISM band.
8. The wireless communications device of claim 1 wherein each of the N sets of parameters includes at least one of: a parameter of an amplification gain of a Bluetooth transmitting circuit of the Bluetooth transceiver; and a parameter of automatic gain control of a Bluetooth receiving circuit of the Bluetooth transceiver.
9. The wireless communication device as claimed in claim 1, wherein the wireless transceiver, the bluetooth transceiver and the bluetooth controller are included in an integrated circuit.
10. The wireless communication device of claim 1, wherein N is an integer not less than three.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220240104A1 (en) * | 2021-01-26 | 2022-07-28 | GM Global Technology Operations LLC | Closed loop environment sensing and control for wireless applications |
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