CN111163497A - Communication device, system and channel switching method - Google Patents
Communication device, system and channel switching method Download PDFInfo
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- CN111163497A CN111163497A CN201911318139.XA CN201911318139A CN111163497A CN 111163497 A CN111163497 A CN 111163497A CN 201911318139 A CN201911318139 A CN 201911318139A CN 111163497 A CN111163497 A CN 111163497A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses communication equipment, a communication system and a channel switching method. Wherein a communication device comprises: a first WiFi module; and the first Bluetooth module is used for sending WiFi channel change information to a second Bluetooth module of the receiving end communication equipment through a Bluetooth link, the receiving end communication equipment further comprises a second WiFi module which is positioned in the same wireless local area network with the first WiFi module, and the information is used for informing the second WiFi module to switch the WiFi channel. The invention utilizes the BT link to transmit the WiFi channel change information, thereby achieving the purpose of quickly switching the WiFi channel, and particularly when the WiFi module of the communication equipment for receiving channel switching is in a dormant state, the communication equipment for initiating channel switching only needs to send the WiFi channel change information once, thereby ensuring that the communication equipment for receiving channel switching can receive the information in time, quickly starting WiFi channel change and reducing the time consumption for switching.
Description
Technical Field
The present invention belongs to the field of wireless communication, and in particular, to a communication device, a communication system, and a channel switching method.
Background
WiFi (a wireless network technology) and Bluetooth (Bluetooth) are the most widely used wireless connection technologies at present, and WiFi has the characteristics of high rate, high delay, high power consumption and the like. BT is suitable for low-speed, low-delay and low-power consumption scenes. Although the two technologies can be integrated in the same wireless communication chip, the WiFi and BT connections still exist independently between two devices with WiFi and BT dual connections established.
The WiFi connection mostly runs in an infrastructure mode (an AP interconnection working mode), that is, an AP (access point), and one or more clients as STAs (stations or stations) together form a BSS (basic service set). The AP is responsible for managing the channel and bandwidth of the BSS and when it detects radar or other interference, it informs the connected STAs to change to a new channel. The process of implementing channel switching in the existing WiFi protocol is shown in fig. 1: the first device A and the second device B are integrated chips with BT and WiFi, WiFi and BT double connection is established between the first device A and the second device B, but WiFi and BT connection independently exists. In a WiFi link, a first device a serves as a WiFi AP, a second device B serves as a WiFi STA, and before the AP changes channels, since the STA may be in a power save state, in order to ensure that the STA can hear WiFi channel change information, the AP needs to send multiple (e.g. 4 shown in the figure) Beacon frames or Probe response frames carrying WiFi channel change information to the STA, and after all Beacon frames or Probe response frames are sent (i.e. cnt ═ 0), the AP can start channel switching. Since each time the Beacon frame is transmitted is separated by a specified time interval, which is mostly 100ms, the transmission of the Probe response frame is passive and cannot be performed in time. Therefore, channel switching is performed after the Beacon frame or the Probe response frame is transmitted for multiple times, which makes channel switching time-consuming, and usually requires hundreds of milliseconds or even seconds.
Disclosure of Invention
The invention provides a communication device, a system and a channel switching method, aiming at overcoming the defect that in the prior art, a channel switching initiating terminal needs to send WiFi frames for multiple times in order to ensure that a receiving terminal really receives WiFi channel change information, so that the time consumption of channel switching is longer.
The invention solves the technical problems through the following technical scheme:
a communication device, comprising:
a first WiFi module; and the number of the first and second groups,
the first Bluetooth module is used for sending WiFi channel change information to a second Bluetooth module of the receiving end communication equipment through a Bluetooth link, the receiving end communication equipment further comprises a second WiFi module which is located in the same wireless local area network with the first WiFi module, and the WiFi channel change information is used for informing the second WiFi module to switch the WiFi channel.
Preferably, the first bluetooth module sends the WiFi channel change information once, and the first WiFi module switches the WiFi channel after the first bluetooth module sends the WiFi channel change information once.
Preferably, the first bluetooth module sends the WiFi channel change information to the second bluetooth module through a bluetooth link when the second WiFi module is in a dormant state.
Preferably, the WiFi channel change information is generated by the first WiFi module and transmitted to the first bluetooth module; or, the WiFi channel change information is carried in a WiFi frame, the WiFi frame is generated by the first WiFi module and transmitted to the first bluetooth module, and the first bluetooth module sends the WiFi frame to the second bluetooth module through a bluetooth link;
and/or the communication equipment is used as a WiFi access point, and the receiving-end communication equipment is used as a WiFi workstation.
A communication device, comprising:
a second WiFi module; and the number of the first and second groups,
and the second Bluetooth module is used for receiving WiFi channel change information through a Bluetooth link, and the WiFi channel change information is used for informing the second WiFi module to switch the WiFi channel.
Preferably, the second bluetooth module is further configured to transmit the WiFi channel change information to the second WiFi module; the second WiFi module is also used for analyzing the WiFi channel change information and then switching WiFi channels;
or, the WiFi channel change information is carried in a WiFi frame, and the second bluetooth module receives the WiFi frame through a bluetooth link and transmits the WiFi frame to the second WiFi module; and the second WiFi module analyzes the WiFi channel change information in the WiFi frame and then switches a WiFi channel.
Preferably, when the second bluetooth module receives the WiFi channel change information through a bluetooth link, the second WiFi module is in a dormant state;
and/or the WiFi channel change information is sent by a first Bluetooth module of initiating terminal communication equipment through a Bluetooth link, the initiating terminal communication equipment is used as a WiFi access point, and the communication equipment is used as a WiFi workstation.
A communication system comprising a communication device as described above and another communication device as described above.
A channel switching method is realized by utilizing an initiating terminal communication device and a receiving terminal communication device, wherein the initiating terminal communication device comprises a first WiFi module and a first Bluetooth module, the receiving terminal communication device comprises a second WiFi module and a second Bluetooth module, and the first WiFi module and the second WiFi module are in the same wireless local area network;
the channel switching method comprises the following steps:
the first Bluetooth module sends WiFi channel change information to the second Bluetooth module through a Bluetooth link, and the WiFi channel change information is used for informing the second WiFi module to switch a WiFi channel;
and the second Bluetooth module receives the WiFi channel change information through a Bluetooth link.
Preferably, the channel switching method further includes:
before the first Bluetooth module sends WiFi channel change information to the second Bluetooth module through a Bluetooth link, the first WiFi module generates WiFi channel change information and transmits the WiFi channel change information to the first Bluetooth module;
after the second Bluetooth module receives the WiFi channel change information through a Bluetooth link, the second Bluetooth module transmits the WiFi channel change information to the second WiFi module, and the second WiFi module analyzes the WiFi channel change information and then switches a WiFi channel;
or the first WiFi module generates a WiFi frame carrying the WiFi channel change information and transmits the WiFi frame to the first Bluetooth module; the first Bluetooth module sends the WiFi frame to the second Bluetooth module through a Bluetooth link; the second Bluetooth module receives the WiFi frame through a Bluetooth link; the second Bluetooth module transmits the WiFi frame to the second WiFi module; and the second WiFi module analyzes the WiFi channel change information in the WiFi frame and then switches a WiFi channel.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the invention utilizes the BT link (instead of the traditional WiFi link) to transmit the WiFi channel change information, thereby achieving the purpose of quickly switching the WiFi channel, and particularly when the WiFi module of the communication equipment for receiving channel switching is in a dormant state, the communication equipment for initiating channel switching can not need to transmit the WiFi channel change information for many times, and only needs to transmit the WiFi channel change information once, thereby ensuring that the communication equipment for receiving channel switching can receive the WiFi channel change information in time, quickly starting the WiFi channel change and reducing the time for switching.
Drawings
Fig. 1 is a schematic diagram illustrating a process of implementing channel switching in a conventional WiFi protocol;
fig. 2 is an interaction diagram of a communication system according to embodiment 1 of the present invention;
fig. 3 is a flowchart of a channel switching method according to embodiment 1 of the present invention;
fig. 4 is a flowchart of another channel switching method according to embodiment 1 of the present invention;
fig. 5 is a flowchart of another channel switching method according to embodiment 1 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 2 shows a communication system, which includes two interactive communication devices, and for convenience of distinction, in this embodiment, the communication device on the left side of the figure is referred to as an originating-side communication device C, and the communication device on the right side of the figure is referred to as a receiving-side communication device D, where the originating-side communication device C can manage and monitor channels, and notify the receiving-side communication device D to switch a WiFi channel, and the receiving-side communication device D can switch the WiFi channel according to the requirement of the originating-side communication device C. In the BSS formed by the originating-side communication device C and the receiving-side communication device D, the originating-side communication device C may function as a WiFi Access Point (AP), and the receiving-side communication device D may function as a WiFi Station (STA).
The initiating terminal communication device C includes a first WiFi module 11 and a first bluetooth module 12, which may be an integrated chip with WiFi-bluetooth. The receiving-end communication device D includes a second WiFi module 21 and a second bluetooth module 22, which may be an integrated chip with WiFi-bluetooth. The first WiFi module 11 and the second WiFi module 21 are in the same wireless local area network, and the first bluetooth module 12 and the second bluetooth module 22 are connected through a bluetooth link, so that the initiating end communication device C and the receiving end communication device D establish WiFi and BT dual connection.
In the originating communication device C, the first bluetooth module 12 is configured to send WiFi channel change information to the second bluetooth module 22 through a bluetooth link. In the receiving-end communication device D, the second bluetooth module 22 is configured to receive the WiFi channel change information through a bluetooth link.
The WiFi channel change information is used to inform the second WiFi module 21 to switch WiFi channels, which may include information of a new WiFi channel to be switched. The WiFi channel change information may be a custom type of information that is sent by the first bluetooth module 12 to the second bluetooth module 22 alone and received by the second bluetooth module 22 alone. The WiFi channel change information may also be carried in a certain message or integrated with other messages and then sent to the second bluetooth module 22 by the first bluetooth module 12, and received by the second bluetooth module 22 together with the information carrying or integrated with the WiFi channel change information. For example, the WiFi channel change information may be carried in a WiFi frame, such as via Beaconframes or probesresponseThe Channel Switch Announcement information element (Channel Switch Announcement IE) or the Extended Channel Switch Announcement information element (Extended Channel Switch Announcement IE) in the frame is expressed, the first bluetooth module 12 sends a Beacon frame or a Probe response frame or other WiFi frame carrying the WiFi Channel change information to the second bluetooth module 22, and the second bluetooth module 22 receives the Beacon frame or the Probe response frame or other WiFi frame carrying the WiFi Channel change information sent by the first bluetooth module 12.
In this embodiment, the WiFi channel change information or the WiFi frame carrying the WiFi channel change information may be generated by the first WiFi module 11 according to the signal strength and the signal quality of the monitored channel, for example, when the signal strength or the signal quality is smaller than a predetermined value, after the generation, the first WiFi module 11 transmits the WiFi channel change information to the first bluetooth module 12, and then the first bluetooth module 12 transmits the WiFi channel change information to the second bluetooth module 22 and receives the WiFi frame by the second bluetooth module 22.
After receiving the WiFi channel change information or the WiFi frame carrying the WiFi channel change information, the second bluetooth module 22 may directly analyze the WiFi channel change information or the WiFi frame carrying the WiFi channel change information, notify the second WiFi module 21 after the analysis, and switch the WiFi channel after the second WiFi module 21 receives the notification; or, the second bluetooth module 22 may further transmit the information change information or the WiFi frame carrying the WiFi channel change information to the second WiFi module 21, and the second WiFi module 21 analyzes the WiFi channel change information or the WiFi channel change information in the WiFi frame, and then switches a WiFi channel. The process of analyzing the WiFi channel change information or analyzing the WiFi frame may be a customized WiFi channel change information rule or refer to an existing WiFi protocol, which is not repeated herein.
No matter whether the second WiFi module 21 is in a dormant state or not, since the first bluetooth module 12 and the second bluetooth module 22 are always connected, the WiFi channel change information transmitted through the bluetooth link or the WiFi frame carrying the WiFi channel change information can be received by the receiving end communication device D in time. Thus, the first bluetooth module 12 can transmit the WiFi channel change information (or the WiFi frame carrying the WiFi channel change information) at a single time without transmitting the WiFi channel change information (or the WiFi frame carrying the WiFi channel change information) at multiple times, and accordingly, the second bluetooth module 22 only needs to receive the WiFi channel change information (or the WiFi frame carrying the WiFi channel change information) 1 time; the first WiFi module 11 may switch the WiFi channel after the first bluetooth module 12 sends the WiFi channel changing information (or the WiFi frame carrying the WiFi channel changing information) once (that is, cnt ═ 0), and the second WiFi module 21 may also switch the WiFi channel after the second bluetooth module 22 receives 1 time the WiFi channel changing information (or the WiFi frame carrying the WiFi channel changing information). Of course, when the second WiFi module 21 is in the sleep state, the first bluetooth module 12 is utilized to send the WiFi channel change information (or carry the WiFi frame of the WiFi channel change information) through the bluetooth link, and the second bluetooth module 22 is utilized to receive the WiFi channel change information (or carry the WiFi frame of the WiFi channel change information) through the bluetooth link, so as to better embody the advantage that the bluetooth link transmission is adopted in the embodiment to the WiFi channel change information, compared with the traditional WiFi link transmission, the WiFi channel change information is in the time-consuming and short-term.
The embodiment also provides a channel switching method, which can be implemented by using the initiating-end communication device C and the receiving-end communication device D. As shown in fig. 3, the channel switching method includes the following steps:
step S31: the first Bluetooth module sends the WiFi channel change information to the second Bluetooth module through a Bluetooth link;
step S32: and the second Bluetooth module receives the WiFi channel change information through a Bluetooth link.
In order to implement a complete channel switching process, when the WiFi channel change information is a self-defined information, as shown in fig. 4, the channel switching method may be further optimized as follows:
step S41: the first WiFi module generates WiFi channel change information and transmits the WiFi channel change information to the first Bluetooth module;
step S42: the first Bluetooth module sends the WiFi channel change information to the second Bluetooth module through a Bluetooth link;
step S43: the second Bluetooth module receives the WiFi channel change information through a Bluetooth link;
step S44: the second Bluetooth module transmits the WiFi channel change information to the second WiFi module;
step S45: and the second WiFi module analyzes the WiFi channel change information and then switches the WiFi channel.
In order to implement a complete channel switching process, when the WiFi channel change information is carried in a WiFi frame or other information, as shown in fig. 5, the channel switching method may further be optimized as follows:
step S51: the first WiFi module generates a WiFi frame carrying the WiFi channel change information and transmits the WiFi frame to the first Bluetooth module;
step S52: the first Bluetooth module sends the WiFi frame to the second Bluetooth module through a Bluetooth link;
step S53: the second Bluetooth module receives the WiFi frame through a Bluetooth link;
step S54: the second Bluetooth module transmits the WiFi frame to the second WiFi module;
step S55: and the second WiFi module analyzes the WiFi channel change information in the WiFi frame and then switches a WiFi channel.
In the channel switching method of this embodiment, the WiFi channel change information is transmitted through the bluetooth link, so as to achieve the purpose of quickly switching the WiFi channel, and especially when the second WiFi module is in a dormant state, the initiating-side communication device C may not need to send the WiFi channel change information many times, and only needs to send the WiFi channel change information once, so that the receiving-side communication device C can be guaranteed to receive the WiFi channel change information in time, thereby quickly starting WiFi channel change and reducing time consumed for switching.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A communication device, comprising:
a first WiFi module; and the number of the first and second groups,
the first Bluetooth module is used for sending WiFi channel change information to a second Bluetooth module of the receiving end communication equipment through a Bluetooth link, the receiving end communication equipment further comprises a second WiFi module which is located in the same wireless local area network with the first WiFi module, and the WiFi channel change information is used for informing the second WiFi module to switch the WiFi channel.
2. The communication device as claimed in claim 1, wherein the first bluetooth module transmits the WiFi channel change information a single time, and the first WiFi module switches WiFi channels after the first bluetooth module transmits the WiFi channel change information a single time.
3. The communications device of claim 1, wherein the first bluetooth module sends the WiFi channel change information to the second bluetooth module over a bluetooth link when the second WiFi module is in a dormant state.
4. The communication device of any of claims 1-3, wherein the WiFi channel change information is generated by the first WiFi module and transmitted to the first Bluetooth module; or, the WiFi channel change information is carried in a WiFi frame, the WiFi frame is generated by the first WiFi module and transmitted to the first bluetooth module, and the first bluetooth module sends the WiFi frame to the second bluetooth module through a bluetooth link;
and/or the communication equipment is used as a WiFi access point, and the receiving-end communication equipment is used as a WiFi workstation.
5. A communication device, comprising:
a second WiFi module; and the number of the first and second groups,
and the second Bluetooth module is used for receiving WiFi channel change information through a Bluetooth link, and the WiFi channel change information is used for informing the second WiFi module to switch the WiFi channel.
6. The communications device of claim 5, wherein said second bluetooth module is further configured to transmit said WiFi channel change information to said second WiFi module; the second WiFi module is also used for analyzing the WiFi channel change information and then switching WiFi channels;
or, the WiFi channel change information is carried in a WiFi frame, and the second bluetooth module receives the WiFi frame through a bluetooth link and transmits the WiFi frame to the second WiFi module; and the second WiFi module analyzes the WiFi channel change information in the WiFi frame and then switches a WiFi channel.
7. The communications device of claim 5, wherein the second WiFi module is in a dormant state when the second bluetooth module receives the WiFi channel change information over a bluetooth link;
and/or the WiFi channel change information is sent by a first Bluetooth module of initiating terminal communication equipment through a Bluetooth link, the initiating terminal communication equipment is used as a WiFi access point, and the communication equipment is used as a WiFi workstation.
8. A communication system comprising a communication device according to any of claims 1-4 and a communication device according to any of claims 5-7.
9. A channel switching method is characterized by being realized by utilizing an initiating terminal communication device and a receiving terminal communication device, wherein the initiating terminal communication device comprises a first WiFi module and a first Bluetooth module, the receiving terminal communication device comprises a second WiFi module and a second Bluetooth module, and the first WiFi module and the second WiFi module are in the same wireless local area network;
the channel switching method comprises the following steps:
the first Bluetooth module sends WiFi channel change information to the second Bluetooth module through a Bluetooth link, and the WiFi channel change information is used for informing the second WiFi module to switch a WiFi channel;
and the second Bluetooth module receives the WiFi channel change information through a Bluetooth link.
10. The channel switching method as claimed in claim 9, wherein the channel switching method further comprises:
before the first Bluetooth module sends WiFi channel change information to the second Bluetooth module through a Bluetooth link, the first WiFi module generates WiFi channel change information and transmits the WiFi channel change information to the first Bluetooth module;
after the second Bluetooth module receives the WiFi channel change information through a Bluetooth link, the second Bluetooth module transmits the WiFi channel change information to the second WiFi module, and the second WiFi module analyzes the WiFi channel change information and then switches a WiFi channel;
or the first WiFi module generates a WiFi frame carrying the WiFi channel change information and transmits the WiFi frame to the first Bluetooth module; the first Bluetooth module sends the WiFi frame to the second Bluetooth module through a Bluetooth link; the second Bluetooth module receives the WiFi frame through a Bluetooth link; the second Bluetooth module transmits the WiFi frame to the second WiFi module; and the second WiFi module analyzes the WiFi channel change information in the WiFi frame and then switches a WiFi channel.
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| CN111163497B (en) | 2022-08-16 |
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