WO2023284805A1 - Channel selection method, devices, storage medium and chip - Google Patents

Abstract

Provided are a channel selection method, devices, a storage medium and a chip. The channel selection method comprises: a first terminal device establishes a communication service with a second terminal device by means of a first channel. The first terminal device acquires quality information of the first channel. If the first terminal device determines that the quality of the first channel indicated by the quality information is lower than a threshold, then the first terminal device switches the communication service from the first channel to a second channel. By means of the foregoing manner, during the operation of the communication service, on the basis of quality information of a working channel, the working channel may be reselected for switching, which may thus improve the quality of the communication service.

Description

Channel selection method, device, storage medium and chip technical field

The present disclosure relates to the communication field, and more particularly, to a channel selection method, device, storage medium and chip.

Background technique

With the development of wireless communication technologies, applications of Wireless-Fidelity (Wi-Fi) become more and more extensive. A Wi-Fi device may work in a 2.4 Gigahertz (Gigahertz, GHz) frequency band and a 5 GHz frequency band. The 2.4GHz frequency band is an IST public frequency band, and multiple devices sharing this frequency band will interfere with each other. The 5GHz frequency band has higher data transmission efficiency than the 2.4GHz frequency band. However, 5GHz has a high frequency, but its penetration is poor, especially in home application scenarios, and its ability to penetrate walls will be worse than that of 2.4GHz. In addition, since the bandwidth mechanism of Wi-Fi realizes the frequency domain multiplexing of 40MHz, 80MHz, 120MHz, and 160MHz by superimposing every 20MHz, it is easy to have channel overlap. Mutual interference of signals from multiple devices and overlapping channels will lead to communication rate fluctuations, serious network retransmissions, and low communication service quality experienced by users.

Contents of the invention

Embodiments of the present disclosure provide a channel selection method, device, storage medium and chip.

In a first aspect, a channel selection method is provided. The method includes: the first terminal device establishes a communication service with the second terminal device through the first channel. The first terminal device acquires quality information of the first channel. If the first terminal device determines that the quality of the first channel indicated by the quality information is lower than the threshold, it switches the communication service from the first channel to the second channel. In this way, the working channel can be reselected for switching based on the quality information of the working channel during the running of the communication service, thereby improving the communication service quality.

In some embodiments, the channel quality information may include information related to at least one of channel quality of service (Quality of Service, QoS) and channel quality. The information related to the QoS of the channel can be used to determine the switching opportunity of the channel. As an example, the information related to the QoS of the channel may include but not limited to: packet loss rate, retransmission times, sending and receiving rate, and round-trip time. Information about channel quality can be used to select the channel to be switched. As an example, information related to channel quality may include, but not limited to: channel load (chload), signal-to-noise ratio (SNR), interference number (SignalNum), signal strength (SignalRSSI), round-trip time delay (RTT), bandwidth (BW ), jitter (Jitter), noise (Noise).

In some embodiments, the first terminal device may acquire quality information of multiple candidate channels, where the multiple candidate channels include the second channel. Furthermore, the first terminal device may switch the communication service from the first channel to the second channel based at least on the quality information of multiple candidate channels. For example, the first terminal device may measure the quality of multiple candidate channels by itself, so as to acquire quality information of the multiple candidate channels. Alternatively, the first terminal device may also receive quality information of multiple candidate channels measured by other terminal devices from other terminal devices. In this way, in the case that the first terminal device may not be convenient to measure the quality of the candidate channel due to the current deployment of services, the first terminal device can also perform channel switching based on the quality information of multiple candidate channels received from other terminal devices .

In some embodiments, the first terminal device may receive quality information for a first subset of the plurality of candidate channels from the second terminal device. The first terminal device may determine quality information for a second subset of the plurality of candidate channels. Furthermore, the first terminal device may select the second channel from the intersection of the first subset and the second subset based on the quality information of the first subset and the quality information of the second subset. In this manner, the first terminal device and the second terminal device can select a channel to be switched through negotiation.

In some embodiments, the first terminal device may determine first quality information for the plurality of candidate channels and may receive second quality information for the plurality of candidate channels from the third terminal device. Furthermore, the first terminal device may update the first quality information based on the second quality information, so as to use the updated first quality information as the quality information. In this manner, when the first terminal device has weak measurement capabilities or can only measure part of channel parameters, all channel parameters can be obtained by receiving channel quality information from other terminal devices.

In some embodiments, when the fourth terminal device joins the communication network where the first terminal device is located for the first time, it may not have channel quality information. In this case, the first terminal device may send channel quality information to the fourth terminal device, so as to facilitate the rapid establishment of communication services between the fourth terminal device and other terminal devices.

In some embodiments, a quality threshold for a channel may be associated with a type of communication traffic. Thus, different thresholds may be determined according to different communication service types, thereby determining different channel switching opportunities.

In some embodiments, the first terminal device may reduce the quality of the communication service if the quality of the channel is lower than a threshold. The first terminal device may reacquire the quality information of the first channel after a predetermined period of time. If the quality of the first channel indicated by the reacquired quality information is still lower than the threshold, the first terminal device may switch the communication service from the first channel to the second channel. Thus, frequent channel switching can be avoided.

In a second aspect, an electronic device is provided. The electronic device includes one or more processors and memory. One or more computer programs are stored in the memory. One or more computer programs include instructions. When the instruction is executed by the electronic device, the electronic device is made to execute the method according to the first aspect.

In a third aspect, a computer readable storage medium is provided. The computer readable storage medium has instructions stored therein. When the instruction is run on the electronic device, the electronic device is made to execute the method according to the first aspect.

In a fourth aspect, a chip is provided. The chip includes processing circuitry. The processing circuit is configured to perform the method according to the first aspect.

Description of drawings

The features, advantages and other aspects of various implementations of the present disclosure will become more apparent with reference to the following detailed description when taken in conjunction with the accompanying drawings. Several implementations of the present disclosure are shown here by way of illustration and not limitation, in the accompanying drawings:

Figure 1 shows a schematic block diagram of a communication network in which embodiments of the present disclosure may be implemented;

Fig. 2 shows a schematic diagram of an interface of a terminal device according to some embodiments of the present disclosure;

FIG. 3 shows a signaling interaction diagram of a channel selection process according to some embodiments of the present disclosure;

Fig. 4 shows a signaling interaction diagram of a channel selection process according to other embodiments of the present disclosure;

FIG. 5 shows a signaling interaction diagram of a channel selection process according to still other embodiments of the present disclosure;

Figure 6 shows a flowchart of an example method for channel selection according to some embodiments of the present disclosure;

FIG. 7 shows a schematic structural diagram of an electronic device according to an embodiment of the present disclosure; and

FIG. 8 shows a schematic diagram of the software structure of an electronic device with an Android (Android) system with a layered architecture according to an embodiment of the present disclosure.

In the various drawings, the same or similar reference numerals denote the same or similar elements.

detailed description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for exemplary purposes only, and are not intended to limit the protection scope of the present disclosure.

In the description of the embodiments of the present disclosure, the term "comprising" and its similar expressions should be interpreted as an open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be read as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same object. Other definitions, both express and implied, may also be included below.

Fig. 1 shows a schematic block diagram of an example communication network 100 in which embodiments of the present disclosure may be implemented. As shown in the figure, the communication network 100 may include terminal devices 110 , 120 , 130 and a router 140 .

It can be understood that in the example of FIG. 1 , the terminal devices 110 , 120 , 130 are respectively shown as a personal computer, a mobile phone (also called a mobile phone) and a tablet computer. However, in other examples, each of the terminal devices 110, 120, 130 may be other electronic devices. Examples of other electronic devices may include, but are not limited to: tablet computers, televisions (also known as smart screens or big screen devices), ultra-mobile personal computers (UMPCs), handheld computers, netbooks, personal digital assistants (personal digital assistant, PDA), vehicle equipment (also known as car machine), wearable electronic equipment, virtual reality equipment, etc. Embodiments of the present disclosure do not impose any limitation on this.

In addition, the numbers of terminal devices and routers shown in FIG. 1 are only for illustration, and the communication network 100 may include more or fewer terminal devices and routers, which is not limited in this embodiment of the present disclosure.

The terminal devices 110, 120, 130 and the router 140 can form a network through wired, wireless or a combination of both. The networking refers to that the terminal devices 110, 120, and 130 complete device discovery based on heartbeat messages, and there is no actual connection. Wireless methods may include, but are not limited to, Bluetooth (BT), Wireless Fidelity (Wi-Fi), Near Field Communication (NFC), Frequency Modulation (FM), Zigbee, Infrared (infrared, IR) technology, etc., where Bluetooth can be traditional Bluetooth or Bluetooth Low Energy (Bluetooth Low Energy, BLE).

Each of the terminal devices 110, 120, 130 and the router 140 periodically sends a heartbeat message to identify itself as being online. Any one of the terminal devices 110, 120, 130 and the router 140 can discover other devices based on heartbeat messages received from other devices. Furthermore, the terminal devices 110 , 120 , 130 and the router 140 can perform credible authentication based on the same user name, based on scanning a code, or inputting a PIN code. After the trusted authentication is completed, the terminal devices 110, 120, 130 and the router 140 can form a network. There may not necessarily be an actual connection between the terminal devices 110, 120, and 130 after networking.

In some embodiments, the terminal devices 110 , 120 and 130 can form a local area network via the router 140 . In such an embodiment, the router 140 can be set as an access point (Access Point, AP), and the terminal devices 110, 120 and 130 can access the router 140 as a station (Station).

In the embodiment where the terminal devices 110, 120, and 130 form a local area network through the router 140, the router 140 may not participate in the networking, so the router 140 is not required to send and receive heartbeat messages, and the router 140 only supports forwarding heartbeat messages. Alternatively, the router 140 may also participate in networking, in which case the router 140 will send and receive heartbeat messages.

In some other embodiments, the terminal devices 110 , 120 and 130 may form a network without the router 140 .

FIG. 2 shows a schematic diagram of an interface 200 of one terminal device (for example, terminal device 120 ) after each terminal device in FIG. 1 is networked. As an example, the interface 200 may be a main interface, a background interface, or a negative screen of the terminal device. It can be seen from the interface 200 that the icon 110-1 of the terminal device 110 and the icon 130-1 of the terminal device 130 are floating around the icon 120-1 of the terminal device 120, which means that the terminal device 110, the terminal device 120 and the terminal device 130 have The networking is completed.

After the terminal device 110, the terminal device 120 and the terminal device 130 complete the networking, any two terminal devices among the terminal devices 110, 120 and 130 can establish a connection in response to the initiation of a communication service. The connection can be a wired connection or a wireless connection. Examples of the communication service may include, but are not limited to: distributed multi-screen collaboration, file transfer, distributed file system, distributed data management, and the like.

In some embodiments, any two terminal devices among the terminal devices 110 , 120 and 130 may be connected via the router 140 .

In some other embodiments, any two terminal devices among the terminal devices 110, 120, and 130 may be directly connected in a peer-to-peer (Peer-to-Peer, P2P) manner. During the process of establishing a connection, two terminal devices can negotiate P2P-related parameters with each other. For example, the two terminal devices can negotiate with each other which terminal device will act as the group owner (Group Owner, GO), P2P connection key, and so on.

In yet other embodiments, any two terminal devices among the terminal devices 110, 120, and 130 may also be directly connected in a shared manner. In such an example, one of the two terminal devices is virtualized as an AP (also called SoftAp) to realize the connection.

In the following, description will be made by taking terminal devices 110 and 120 establishing a P2P connection to run a screen projection service (ie, projecting content displayed on the screen of terminal device 110 to terminal device 120 ) as an example. However, it should be understood that, depending on the type of service initiated, connections other than P2P connections may be established between terminal devices 110 and 120 . Embodiments of the present disclosure do not impose any limitation on this. The embodiments of the present disclosure can be applied to other scenarios of channel selection, and are not limited to the scenario of connecting terminal devices through P2P, SoftAp or AP-Station.

In an example of running a screen projection service, the terminal device 110 may serve as a GO, and the terminal device 120 may serve as a GC.

After the terminal devices 110 and 120 establish a connection, one of the terminal device 110 and the terminal device 120 will select an appropriate candidate channel from multiple candidate channels as a working channel between them to run communication services. In the following, the working channel selected before running the communication service is also referred to as the first channel.

In the embodiment where the terminal devices 110 and 120 establish a P2P connection, the terminal device serving as GO among the terminal devices 110 and 120 may select a working channel. Alternatively, the terminal device serving as the GC among the terminal devices 110 and 120 may also select the working channel, which is not limited in this embodiment of the present disclosure.

In order to select a working channel, after the terminal device 110 and the terminal device 120 complete the networking and before the connection is established, the terminal device acting as GO may measure the channel quality of multiple candidate channels to obtain the first measurement result of the channel. A terminal device acting as a GO may determine evaluation scores for a plurality of candidate channels based at least on the first measurement result. The evaluation scores each indicate the channel quality of the corresponding candidate channel. Similarly, after networking and before establishing a connection, a terminal device acting as a GC may also measure channel qualities of multiple candidate channels to obtain a second channel measurement result. A terminal device acting as a GC may determine evaluation scores for the plurality of candidate channels based at least on the second measurement result. Details about determining the evaluation scores of multiple candidate channels will be described in detail in the section "Channel Measurement, Measurement Result Synchronization, and Channel Score Matrix Construction" below.

Furthermore, in some embodiments, the terminal device acting as the GO among the terminal devices 110 and 120 may select a candidate channel from the multiple candidate channels as the working channel based on the evaluation scores of the multiple candidate channels determined by itself.

In some other embodiments, the terminal devices 110 and 120 may determine the working channel through negotiation. Such an embodiment will be described below with reference to FIG. 3 .

FIG. 3 shows a signaling interaction diagram of a channel selection process 300 according to some embodiments of the present disclosure. For purposes of discussion, channel selection process 300 will be described with reference to various elements shown in FIG. 1 . However, it should be understood that the channel selection process 300 may also be performed in any other communication scenario. In addition, in the process 300, the terminal device 110 acts as a GO, the terminal device 120 acts as a GC, and the terminal device 110 acting as a GO selects a working channel.

As shown in FIG. 3 , the terminal device 120 may select (310) a subset (also referred to as subset A) of the plurality of candidate channels based on the evaluation scores of the plurality of candidate channels determined by itself.

In some embodiments, the plurality of candidate channels may be a collection of channels supported by the terminal devices 110 and 120 . In some embodiments, subset A may include candidate channels supported by terminal device 120.

Further, the terminal device 120 may send (320) the information of the subset A of the plurality of candidate channels to the terminal device 110 . Accordingly, terminal device 110 may receive ( 330 ) information of subset A of the plurality of candidate channels from terminal device 120 .

In some embodiments, the terminal device 120 may send the information of the subset A of multiple candidate channels to the terminal device 110 in the form of a channel list (also referred to as a channel list A). Candidate channels in channel list A may be arranged in order of evaluation scores. For example, the candidate channels in the channel list A may be arranged in order of evaluation scores from high to low or from low to high.

In some embodiments, the terminal device 120 can work in multiple frequency bands. In such an embodiment, the terminal device 120 may respectively determine a channel sub-table for multiple frequency bands, and the channel list A includes information about channels in the multiple channel sub-tables. For example, in an example where the terminal device 120 can work at 2.4GHz and 5GHz, the terminal device 120 can determine the channel sub-tables A1 and A2 respectively for the 2.4GHz and 5GHz frequency bands, and the channel list A can include the candidate channels in the channel sub-tables A1 and A2. channel information. The candidate channels in the channel sub-tables A1 and A2 may be arranged in order of evaluation scores from high to low or from low to high. For example, subset A1 may include candidate channels with indexes 31, 32, and 33 respectively (also referred to as candidate channels 31, 32, and 33) associated with the 2.4GHz frequency band, and subset A2 may include candidate channels associated with the 5GHz frequency band. Candidate channels with indices 34, 35 and 36 respectively (also referred to as candidate channels 34, 35 and 36).

The terminal device 110 may select (340) a subset (also referred to as subset B) of the plurality of candidate channels based on the evaluation scores of the plurality of candidate channels determined by itself. In some embodiments, subset B may include candidate channels supported by terminal device 110 .

In some embodiments, the terminal device 110 may arrange the channels of the subset B according to the order of evaluation scores, so as to generate a channel list (also referred to as a channel list B). Similarly, the candidate channels in the channel list B may also be arranged in order of evaluation scores from high to low or from low to high.

In some embodiments, the terminal device 110 may also work in multiple frequency bands. In such an embodiment, the terminal device 110 may respectively generate a channel sub-table for multiple frequency bands, and the channel list B includes information of channels in the multiple channel sub-tables. For example, in an example where the terminal device 110 can work in the 2.4GHz and 5GHz frequency bands, the terminal device 110 can respectively determine channel sub-tables B1 and B2 for the 2.4GHz and 5GHz frequency bands, and the channel list B can include channel sub-tables B1 and B2. Candidate channel information. The candidate channels in the channel sub-tables B1 and B2 may be arranged in order of evaluation scores from high to low or from low to high. For example, subset B1 may include candidate channels with indices 32, 33, and 34 respectively (also referred to as candidate channels 32, 33, and 34) associated with the 2.4GHz band, and subset B2 may include Candidate channels with indices 35, 36 and 37 respectively (also referred to as candidate channels 35, 36 and 37).

Further, the terminal device 110 may select (350) a candidate channel from the intersection of the subset A and the subset B as the working channel.

For example, in an example where subset A includes channel sub-tables A1 and A2 and subset B includes channel sub-tables B1 and B2, if terminal device 110 wants to switch to a channel in the 2.4GHz frequency band, terminal device 110 can switch to a channel in the channel sub-table A candidate channel is selected from the intersection of tables A1 and B1 as the working channel, that is, a candidate channel is selected from the candidate channels 32 and 33 as the working channel. For another example, if the terminal device 110 wants to switch to a channel in the 5GHz frequency band, the terminal device 110 can select a candidate channel as the working channel in the intersection of the channel sub-tables A2 and B2, that is, select one of the candidate channels 35 and 36 The candidate channel is used as the working channel.

It will be appreciated that although act 340 is shown in Figure 3 as being performed after act 330, this is merely an example. In other examples, act 340 may be performed between act 310 and act 330 , or act 340 may be performed before act 310 , or act 340 may be performed in parallel with act 310 .

In addition, it can be understood that FIG. 3 shows the process of selecting a working channel by the terminal device 110 acting as a GO. However, in other embodiments, the terminal device 120 acting as a GC may also perform a process similar to the process 300 to select a working channel. In such an embodiment, the terminal device 120 acting as a GC may receive information of a subset of candidate channels with better channel quality determined by the terminal device 110 from the terminal device 110 acting as a GO, based on the evaluation scores of the candidate channels determined by itself To select another subset of candidate channels with better channel quality, and then select a candidate channel from the intersection of these two subsets as the working channel.

According to the embodiments of the present disclosure, when a communication service is initiated, a channel with better channel quality is selected to establish the communication service, thereby improving the communication service quality.

After the working channel is selected, both terminal devices 110 and 120 can create a working channel between the two terminal devices 110 and 120 to run communication services. For example, in an example of a screen casting service, the terminal device 120 may send a video stream to the terminal device 110 , and then project the video stream onto the display screen of the terminal device 110 .

During the running of the communication service, the channel selected when the communication service is deployed may be interfered and the service quality will be degraded. To this end, the terminal device 110 or 120 can measure the service quality of the working channel during the operation of the communication service. Measuring the quality of service of the working channel may include measuring at least one of the following items of the working channel: packet loss rate, retransmission times, sending and receiving rate, and round-trip time.

If the measured quality of service is below a threshold, one of the terminal devices 110 and 120 may switch the operating channel from the first channel to the second channel.

In some embodiments, the terminal device 110 or 120 may select the second channel from the multiple candidate channels based on the evaluation scores of the multiple candidate channels.

In some other embodiments, the terminal devices 110 and 120 may determine the second channel through negotiation. Such an embodiment will be described below with reference to FIG. 4 .

FIG. 4 shows a signaling interaction diagram of a channel selection process 400 according to some embodiments of the present disclosure. For purposes of discussion, channel selection process 400 will be described with reference to various elements shown in FIG. 1 . However, it should be understood that the channel selection process 400 may also be performed in any other communication scenario. In addition, in the process 400, the terminal device 110 acts as the GO, the terminal device 120 acts as the GC, and the terminal device 110 acting as the GO selects the second working channel to be switched to.

As shown in FIG. 4, the terminal device 120 measures the service quality of the current working channel (ie, the first channel) (410). If the service quality of the first channel is lower than the threshold, the terminal device 120 selects (420) a subset (also referred to as subset C) of the plurality of candidate channels based on the evaluation scores of the plurality of candidate channels determined by itself.

In some embodiments, the threshold is associated with a type of communication traffic. In other words, different communication services may have different tolerances for channel QoS. Thus, the corresponding threshold can be determined according to the type of communication service.

In some embodiments, the subset C may include candidate channels supported by the terminal device 120 .

Further, the terminal device 120 may send (430) information of the subset C of the plurality of candidate channels to the terminal device 110 . Accordingly, the terminal device 110 may receive (440) from the terminal device 120 information of the subset C of the plurality of candidate channels.

Similar to the subset A, the terminal device 120 may send the information of the subset C of multiple candidate channels to the terminal device 110 in the form of a channel list (also referred to as a channel list C). The candidate channels in the channel list C may be arranged in order of evaluation scores from high to low or from low to high.

In addition, similar to subset A, in an embodiment where the terminal device 120 can work in multiple frequency bands, the terminal device 120 can respectively determine a channel sub-list for the multiple frequency bands, and the channel list C includes the channels in the multiple channel sub-tables Information.

The terminal device 110 may select (450) a subset (also referred to as subset D) of the plurality of candidate channels based on the evaluation scores of the plurality of candidate channels determined by itself. In some embodiments, the subset D may include candidate channels supported by the terminal device 110.

Similar to the subset B, the terminal device 110 may arrange the channels of the subset D according to the order of evaluation scores, so as to generate a channel list (also referred to as a channel list D). Similarly, the candidate channels in the channel list D may also be arranged in order of evaluation scores from high to low or from low to high.

In an embodiment in which the terminal device 110 can work in multiple frequency bands, the terminal device 110 can respectively generate a channel sub-table for the multiple frequency bands, and the channel list D includes information about channels in the multiple channel sub-tables.

Further, the terminal device 110 may select (460) a candidate channel from the intersection of the subset C and the subset D as the second channel.

For example, in an example where subset C includes channel subtables C1 and C2 associated with the 2.4GHz frequency band and subset D includes channel subtables D1 and D2 associated with the 5GHz frequency band, if terminal device 110 wants to switch to 2.4 GHz frequency band channel, the terminal device 110 may select a candidate channel in the intersection of the channel sub-tables C1 and D1 as the working channel. For another example, if the terminal device 110 wants to switch to a channel in the 5GHz frequency band, the terminal device 110 may select a candidate channel in the intersection of the channel sub-tables C2 and D2 as the working channel.

In some embodiments, optionally, after selecting the second channel to be switched to, the terminal device 110 may send a switching notification to the terminal device 120 . The switching notification may indicate information of the second channel. In addition, optionally, the switching notification may also indicate the switching time of the channel. Furthermore, the terminal devices 110 and 120 may switch the working channel to the second channel at the notified switching time.

It will be appreciated that although act 450 is shown in Figure 4 as being performed after act 440, this is merely an example. In other examples, act 450 may be performed between act 410 and act 440 , or act 440 may be performed before act 410 , or act 450 may be performed in parallel with act 410 .

In addition, it can be understood that FIG. 4 shows a process in which the terminal device 110 acting as a GO selects a channel to be switched to. However, in other embodiments, the terminal device 120 acting as the GC may also perform a process similar to the process 400 to select the channel to be switched to.

According to the embodiments of the present disclosure, during the communication service, if it is detected that the service quality of the channel is lower than the threshold, a working channel may be reselected based on the channel measurement result for switching, thereby further improving the communication service quality.

In some embodiments, if the measured quality of service is lower than a threshold, before switching the working channel from the first channel to the second channel, the terminal device 120 may reduce the quality of the communication service. For example, the terminal device 120 may reduce the code rate, resolution, compressed picture quality, etc., so as to reduce the bandwidth occupancy rate.

Furthermore, the terminal device 120 may re-measure the service quality of the first channel after a predetermined period of time. For example, terminal device 120 may start a timer. If the timer expires and the remeasured quality of service is still lower than the threshold, the terminal device 120 may switch the communication service from the first channel to the second channel. On the other hand, if the timer expires and the remeasured quality of service is higher than the threshold, the terminal device 120 may keep the communication traffic on the first channel. Thus, it is possible to avoid affecting communication services due to channel switching.

In the following, details about channel measurement, synchronization, channel scoring matrix construction will be described.

Channel measurement, synchronization of measurement results, construction of channel scoring matrix

1. Channel measurement

As mentioned above, the terminal devices 110 and 120 may measure the channel qualities of multiple candidate channels in an idle state, so as to respectively obtain the first measurement result and the second measurement result of the channels. It should be noted that the terminal devices 110 and 120 can measure the channel quality of the candidate channel before and during the communication service, and the scope of the present disclosure is not limited in this respect. In addition, the terminal device 130 in the communication network 100 may also measure the channel quality of multiple candidate channels in an idle state, so as to obtain a third channel measurement result.

In some embodiments, any one of the terminal devices 110, 120 and 130 may periodically measure the channel quality of multiple candidate channels in an idle state. In such an embodiment, if any one of the terminal devices 110, 120 and 130 detects that the measurement period has expired, the terminal device may determine whether it is capable of taking measurements. For example, if the terminal device 110 does not have the measurement capability or is deploying services, it may determine that it cannot perform the measurement itself.

If any one of the terminal devices 110, 120 and 130 can measure, the terminal device can further determine whether it is in an idle state. In some embodiments, if the terminal device is not currently connected to any AP or has not established any P2P service, the terminal device is in an idle state. In some other embodiments, if the terminal device is in the Wi-Fi state, but there is no Wi-Fi connection with other devices, or although there is a Wi-Fi connection with other devices, but the current traffic is less than a predetermined threshold, Then the terminal device is in an idle state.

It can be understood that the above is only an example of determining whether the terminal device is in an idle state, and the scope of the present disclosure is not limited in this respect.

Alternatively, the two terminal devices may also negotiate to switch from the working channel to a candidate channel for measurement in a certain period during the communication service, and switch back to the working channel after the measurement is completed. In this way, it is possible to prevent packet loss due to the fact that the two terminal devices are not in the same channel and the sending and receiving are inconsistent.

In some embodiments, a terminal device not participating in the networking may also measure the channel quality of multiple candidate channels. In such an embodiment, a longer measurement period can be set. In addition, a terminal device that does not participate in the networking can only retain a measurement result once in a static state. After the terminal device participates in the networking, the measurement period can be shortened. Optionally, the terminal device triggers a measurement when it senses that the mobile state is switched to the stationary state.

In addition, the embodiments of the present disclosure may also have other application scenarios. For example, two terminal devices can conduct a one-time networking to share files temporarily.

In some embodiments, the terminal device may measure channel evaluation parameters as shown in Table 1 below.

Table 1

It can be understood that Table 1 is only illustrative, and the terminal device may measure more or less evaluation parameters, and the scope of the present disclosure is not limited in this respect.

In some embodiments, the terminal device may determine whether it is in an idle state every time it measures a candidate channel. If it is determined that it is in an idle state, the terminal device may further measure other candidate channels.

2. Synchronization of measurement results

In some embodiments, when the terminal device 130 joins the communication network formed by the terminal devices 110 and 120 for the first time, the terminal device 110 or 120 may synchronize its own channel measurement results (first measurement results or second measurement results) to the terminal device 130. It should be understood that "joining" here means that the terminal device 130 joins the communication network formed by the terminal devices 110 and 120 but does not initiate a communication service, and the terminal device 130 only discovers the terminal devices 110 and 120 through a discovery mechanism. In this way, if the terminal device 130 initiates a communication service with other terminal devices (not shown in FIG. 1 ) immediately after accessing the network, the terminal device 130 can select the Appropriate channels are established for traffic. Thus, communication efficiency is improved. Such an embodiment will be described below with reference to FIG. 5 .

FIG. 5 shows a signaling interaction diagram of a channel measurement result synchronization process 500 according to some embodiments of the present disclosure. For purposes of discussion, process 500 will be described with reference to various elements shown in FIG. 1 . However, it should be understood that process 500 may also be performed in any other communication scenario. In process 500 , terminal device 130 accesses the communication network formed by terminal devices 110 and 120 for the first time, and terminal device 110 synchronizes its own channel measurement result (first measurement result) to terminal device 130 . However, it should be understood that a process similar to the process 500 may be performed between the terminal device 120 and the terminal device 130 to achieve synchronization of channel measurement results.

As shown in FIG. 5 , after the terminal device 130 accesses the communication network formed by the terminal devices 110 and 120 for the first time, it sends ( 510 ) a measurement result synchronization request to the terminal device 110 . After receiving ( 520 ) the measurement result synchronization request, the terminal device 110 may synchronize ( 530 ) the first measurement result of the channel to the terminal device 130 . Accordingly, the terminal device 130 receives (540) from the terminal device 110 a first measurement result of the channel.

In some embodiments, the terminal device 110 can synchronize the channel measurement results through a local area network. Alternatively, the terminal device 110 may synchronize the channel measurement results through BLE broadcast or BLE connection.

In some embodiments, optionally, the terminal device 130 may determine evaluation scores of multiple candidate channels based on the first measurement result.

In some embodiments, optionally, after the terminal device 130 accesses the communication network formed by the terminal device 110 and the terminal device 120, the terminal device 130 itself may also measure the channel quality of multiple candidate channels (550), to obtain a third measurement result of the channel.

In some embodiments, optionally, the terminal device 130 may use its own channel measurement result (ie, the third measurement result) to update the evaluation scores of multiple candidate channels.

In some embodiments, some terminal devices in the communication network 100 may not be convenient for measurement because services are currently being deployed. For example, as mentioned above, since the terminal devices 110 and 120 are deploying the screen projection service, it is not convenient to measure the channel quality. In such an embodiment, a terminal device that is convenient for measurement in the communication network 100 may synchronize its own measurement results to a terminal device that is not convenient for measurement. For example, in the process 500, optionally, the terminal device 130 may synchronize (560) its own channel measurement result (ie, the third measurement result) to the terminal device 110 . For example, the terminal device 130 may synchronize channel measurement results through a local area network. Alternatively, the terminal device 130 may synchronize the channel measurement results through BLE broadcast or BLE connection.

Accordingly, the terminal device 110 receives ( 570 ) the third measurement result from the terminal device 130 . After receiving (570) the third measurement result, optionally, the terminal device 110 may use the third measurement result to update (580) the local evaluation scores of the plurality of candidate channels.

In some other embodiments, some terminal devices in the communication network 100 may not have measurement capabilities, have weak measurement capabilities, or can only measure part of the evaluation parameters. For example, terminal devices in the communication network 100 may include rich devices and lightweight devices. Rich devices usually have measurement capability and abundant hardware resources, so they can perform channel measurement with idle resources. For example, rich devices can be scheduled with rich computing resources. Alternatively, the rich device may have additional radio frequency resources, such as supporting dual radio frequencies such as 2.4GHz and 5GHz or supporting three radio frequencies such as 2.4GHz, 5GHz and 6GHz. Alternatively, the rich device may have additional device resources, such as a separate antenna, or a separate wireless chip resource, so that channel measurement can be performed with idle resources. However, lightweight devices may not have measurement capabilities, or may not have abundant CPU resources, so channel measurement will seriously affect services; or only part of the evaluation parameters can be measured. In such an embodiment, a terminal device capable of measuring or capable of measuring all evaluation parameters may synchronize its own measurement results to a terminal device that does not have measurement capability, has weak measurement capability, or can only measure part of the evaluation parameters.

Thus, each terminal device in the communication network 100 can obtain or update the measurement result of the channel, so as to determine or update the evaluation score of the channel. Furthermore, each terminal device can select an appropriate working channel based on the evaluation score of the channel when the communication service is initiated.

In some embodiments, some terminal devices in the communication network 100 may be very electrical devices, and if the very electrical devices frequently synchronize channel measurement results, they will consume more power consumption. In order to reduce the synchronization of channel measurement results, multiple thresholds can be defined for each parameter to be measured, and each threshold is associated with a corresponding gear. For example, take the signal strength shown in Table 1 as an example. A first threshold, a second threshold, a third threshold, and a fourth threshold arranged in descending order may be defined for signal strength. The first threshold, the second threshold, the third threshold and the fourth threshold are respectively associated with strong, medium, weak and unacceptable gears. If the measured signal strength fluctuates within four thresholds, synchronization may not be initiated. If the measured signal strength fluctuates across a threshold, synchronization is initiated. For example, synchronization may be initiated if the measured signal strength is below a fourth threshold, indicating that the measured signal strength is at an unacceptable level.

In order to further reduce the synchronization of channel measurement results, terminal devices in the communication network 100 may dynamically exchange measurement capability information with each other at any time when they participate in the networking. If each end device supports measurements, no synchronization is required. If a terminal device is unable to perform self-measurement due to the fact that the measurement may affect the service due to the busy phase of distributed services, only the terminal device can notify one or more nearby devices to synchronize the channel measurement results to itself.

In addition, in some embodiments, in order to improve the accuracy of the measurement result, the measurement cycle of the terminal device (for example, the constant power device) may be shortened.

3. Verdict on validity of simultaneous measurement results

In some embodiments, if the terminal device can measure locally, its own measurement result is preferentially used. In the case that there is no local measurement result of the terminal device, if there is only one measurement result, the measurement result is used. In the case that a terminal device has measurement results synchronized by multiple neighbors at the same time, the measurement result synchronized by the neighbor closest to itself is preferentially used. In the event that an end device simultaneously has measurements synchronized by several neighbors at close distances, the most recent measurement is used first.

4. Data decay

In some embodiments, the terminal device 110 may determine the distance and angle between the two based on the heartbeat message received from the terminal device 130 . Therefore, after receiving the third measurement result from the terminal device 130, the terminal device 110 may reduce (also referred to as attenuation) the received third measurement result based on at least one of the distance and angle between the two. As an example, the terminal device 110 may reduce the received third measurement result by a predetermined value based on at least one of a distance and an angle between the two.

For example, taking signal strength as an example, terminal device 110 may attenuate the signal strength in the third measurement result based on Table 2 below.

Table 2

distance (m)	Attenuation value (dB)
less than 3	0
3	2
6	4
9	6

As shown in Table 2, if the distance between the terminal device 110 and the terminal device 130 is less than 5 meters, the terminal device 110 may not attenuate the signal strength in the third measurement result. If the distance between the terminal device 110 and the terminal device 130 is 5 meters, the terminal device 110 may attenuate the signal strength in the third measurement result by 2 decibels. If the distance between the terminal device 110 and the terminal device 130 is 10 meters, the terminal device 110 may attenuate the signal strength in the third measurement result by 4 decibels. and so on.

It can be understood that the above is only an example of the terminal device attenuating the channel measurement results received from other terminal devices. The terminal device may select a corresponding attenuation strategy according to a specific application scenario, and the scope of the present disclosure is not limited in this respect.

In some embodiments, if a terminal device attenuates channel measurement results received from other terminal devices below a predetermined threshold, it may consider that the measurement results have no effect on itself. For example, a terminal device can perceive the signal boundary on a certain channel based on the measurement results received from other terminal devices, but the measurement results of this channel have been attenuated below a predetermined threshold. The sending and receiving of the device is not affected.

5. Channel scoring matrix construction

In some embodiments, after obtaining the measurement results of the channels, any one of the terminal devices 110, 120 and 130 may determine evaluation scores of multiple candidate channels based on the measurement results of the channels. Any one of the terminal devices 110, 120 and 130 may maintain the evaluation scores of the plurality of candidate channels in any suitable manner. As an example, any of terminal devices 110, 120, and 130 may utilize a channel scoring matrix to maintain evaluation scores for a plurality of candidate channels. Of course, the evaluation scores of multiple candidate channels may also be maintained in a manner other than the channel scoring matrix, and the scope of the present disclosure is not limited in this respect. In the following, for the purpose of illustration, the channel scoring matrix will be used as an example for description.

In some embodiments, any of terminal devices 110, 120, and 130 may determine an evaluation score for each of the plurality of candidate channels based on:

where _xi represents the measured value of the i-th evaluation parameter of the candidate channel, f _i ( _xi ) represents the score associated with the i-th evaluation parameter, and a _i represents the weight associated with the i-th evaluation parameter.

In some embodiments, a _i may be determined through simulation evaluation and/or actual testing. For example, a ₁ =25, a ₂ =25, a ₃ =40, a ₄ =40 can be determined through multiple measurements.

As an example, the evaluation parameters of the candidate channels may include, for example, the evaluation parameters shown in Table 1 above. For example, x ₁ can represent the amount of interference of the candidate channel, x ₂ can represent the signal strength of the candidate channel, x ₃ can represent the channel load of the candidate channel, and x ₂ can represent the noise floor of the candidate channel.

In some embodiments, the measured values of each evaluation parameter can be input into the neural network model, and the evaluation score can be output after effective calculation.

FIG. 6 shows a flowchart of an example method 600 for channel selection according to some embodiments of the present disclosure. In some embodiments, example method 600 may be implemented by a first terminal device. As an example, the first terminal device may be any one of the terminal devices 110 , 120 and 130 in the example communication network 100 . In such an example, the method 600 may be implemented by a processor or a processing unit of the terminal device 110, 120 or 130 in cooperation with other components (for example, a transceiver). In other embodiments, the example method 600 may also be implemented by other communication devices independent of the example communication network 100 .

At block 610, the first terminal device measures the quality of service of the first channel during communication traffic with the second terminal device over the first channel.

At block 620, if the quality of service is below the threshold, the first terminal device switches communication traffic from the first channel to the second channel.

Using the method 600, the terminal device can switch to the channel with the globally optimal channel quality during the running of the communication service. For example, in the case of a large number of distributed services, the central node in the network can issue instructions in advance to make the terminal equipment in the network choose to work on a predetermined channel or select a channel that can accommodate the current service, so that the entire network Communication quality is optimal.

FIG. 7 shows a schematic structural diagram of an electronic device 700 according to an embodiment of the present disclosure. As shown in FIG. 7 , the electronic device 700 may include a processor 210, an external memory interface 292, an internal memory 296, a subscriber identity module (Subscriber Identification Module, SIM) card interface 294, a display screen 220, a camera 222, an indicator 224, a motor 226, button 228, universal serial bus (Universal Serial Bus, USB) interface 230, charging manager module 240, power management module 242, battery 244, mobile communication module 250, antenna 252, wireless communication module 260, antenna 262, audio Module 270, speaker 272, receiver 274, microphone 276, earphone interface 278, sensor module 280 and so on. The sensor module 280 includes a pressure sensor 2802, a gyro sensor 2804, an air pressure sensor 2806, a magnetic sensor 2808, an acceleration sensor 2810, a distance sensor 2812, a proximity light sensor 2814, a fingerprint sensor 2816, a temperature sensor 2818, a touch sensor 2820 and an ambient light sensor 2822 et al.

It can be understood that FIG. 7 is only a schematic illustration, and the electronic device 700 may include more or fewer components, or multiple components may be combined into one component, or one component may be split into multiple components. , or a combination of the above, etc. In addition, it can be understood that the components shown in FIG. 7 can be implemented by hardware, software, or a combination of software and hardware.

The processor 210 may include one or more processing units, for example, may include a central processing unit (Central Processing Unit, CPU), an application processor (Application Processor, AP), a modem processor, a graphics processing unit (Graphics Processing Unit, GPU), image signal processor (Image Signal Processor, ISP), controller, video codec, digital signal processor (Digital Signal Processor, DSP), baseband processor, and/or neural network processor (Neural-Network Processing Unit, NPU), etc., where different processing units can be independent devices or integrated in one or more processors.

A memory may also be provided in the processor 210 for storing instructions and data. As an example, the memory in the processor 210 is a cache memory. The memory may hold instructions or data that the processor 210 has just used or recycled. If the processor 210 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 210 is reduced, thereby improving the efficiency of the system.

Processor 210 may include one or more interfaces. The interface can include an integrated circuit (Inter-Integrated Circuit, I2C) interface, an integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, mobile industry processor interface (Mobile Industry Processor Interface, MIPI), general-purpose input/output (General-Purpose Input/Output, GPIO) interface, SIM card interface 294, and/or USB interface 230, etc. .

The I2C interface is a bidirectional synchronous serial bus, including a serial data line (serial data line, SDA) and a serial clock line (derail clock line, SCL). In some scenarios, processor 210 may include multiple sets of I2C buses. The processor 210 may be respectively coupled to the touch sensor 2820, the charger, the flashlight, the camera 222, etc. through different I2C bus interfaces. For example, the processor 210 may be coupled to the touch sensor 2820 through the I2C interface, so that the processor 210 and the touch sensor 2820 communicate through the I2C bus interface to realize the touch function of the electronic device 700 .

The I2S interface can be used for audio communication. In some scenarios, processor 210 may include multiple sets of I2S buses. The processor 210 may be coupled to the audio module 270 through an I2S bus to implement communication between the processor 210 and the audio module 270 . In some scenarios, the audio module 270 can transmit audio signals to the wireless communication module 260 through the I2S interface, so as to realize the function of answering calls through Bluetooth headsets and the like.

The PCM interface can also be used for audio communication to sample, quantize and encode analog signals. In some scenarios, the audio module 270 and the wireless communication module 260 may be coupled through a PCM bus interface. In some scenarios, the audio module 270 can also transmit audio signals to the wireless communication module 260 through the PCM interface, so as to realize the function of answering calls through a Bluetooth headset or the like. It can be understood that both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communication. The bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some scenarios, a UART interface is generally used to connect the processor 210 and the wireless communication module 260 . For example, the processor 220 communicates with the Bluetooth module in the wireless communication module 260 through the UART interface to realize the Bluetooth function. In some scenarios, the audio module 270 can transmit audio signals to the wireless communication module 260 through the UART interface, so as to realize the function of playing music through a Bluetooth headset or the like.

The MIPI interface can be used to connect the processor 210 with peripheral devices such as the display screen 220 and the camera 222 . MIPI interface includes camera serial interface (camera serial interface, CSI), display serial interface (display serial interface, DSI), etc. In some scenarios, the processor 210 and the camera 222 communicate through the CSI interface to implement the shooting function of the electronic device 700 . The processor 220 and the display screen 220 communicate through the DSI interface to implement the display function of the electronic device 700 .

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some scenarios, the GPIO interface can be used to connect the processor 210 with the camera 222 , the display screen 220 , the wireless communication module 260 , the audio module 270 , the sensor module 280 and so on. The GPIO interface can also be configured as an I2C interface, I2S interface, UART interface, MIPI interface, etc.

The USB interface 230 is an interface that conforms to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like. The USB interface 230 can be used to connect a charger to charge the electronic device 700 , and can also be used to transmit data between the electronic device 700 and peripheral devices. It can also be used to connect headphones and play audio through them. This interface can also be used to connect other electronic devices, such as AR devices.

It can be understood that the present disclosure only schematically lists the interface connection relationship among the modules, but these illustrations should not be interpreted as limiting the structure of the electronic device 700 . The electronic device 700 may also adopt an interface connection manner different from that described above, or may adopt a combination of various interface connection manners.

The charging management module 240 is configured to receive charging input from the charger. The charger can be a wireless charger or a wired charger. In the case of wired charging, the charging management module 240 may receive a charging input from the wired charger through the USB interface 230 . In the case of wireless charging, the charging management module 240 may receive a wireless charging input through a wireless charging coil of the electronic device 700 . While the charging management module 240 is charging the battery 244 , it can also supply power to the electronic device 700 through the power management module 242 .

The power management module 242 is used for connecting the battery 244 , the charging management module 240 and the processor 210 . The power management module 242 receives the input of the battery 244 and/or the charging management module 240, and provides power for the processor 210, the internal memory 296, the display 220, the camera 222 and the wireless communication module 260, etc. The power management module 242 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (such as leakage, impedance). In some cases, the power management module 242 can also be disposed in the processor 210 . In other cases, the power management module 242 and the charging management module 240 can also be set in the same device.

The wireless communication function of the electronic device 700 can be realized by the mobile communication module 250, the antenna 252, the wireless communication module 260, the antenna 262, the modem processor and the baseband processor.

The antenna 252 and the antenna 262 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 700 may be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example, antenna 252 may be multiplexed as a diversity antenna for a wireless local area network. For example, an antenna can be used in conjunction with a tuning switch.

The mobile communication module 250 can provide wireless communication solutions including 2G/3G/4G/5G applied on the electronic device 700 . The mobile communication module 250 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module 250 can receive electromagnetic waves through the antenna 1, filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation. The mobile communication module 250 can also amplify the signal modulated by the modem processor, convert it into electromagnetic wave and radiate it through the antenna 252 . In some scenarios, at least part of the functional modules of the mobile communication module 250 may be set in the processor 210 . In some scenarios, at least part of the functional modules of the mobile communication module 250 and at least part of the modules of the processor 210 may be set in the same device.

The modem processor may include a modulator and a demodulator, wherein the modulator is used to modulate the low-frequency baseband signal to be transmitted into a medium-high frequency signal, and the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. Then the demodulator sends the demodulated low-frequency baseband signal to the baseband processor for processing. The low-frequency baseband signal is passed to the application processor after being processed by the baseband processor. The application processor outputs sound signals through audio equipment (not limited to speaker 272 , receiver 274 , etc.), or displays images or videos through display screen 220 . In some scenarios, the modem processor may be a stand-alone device. In other scenarios, the modem processor may be independent of the processor 210, and be set in the same device as the mobile communication module 250 or other functional modules.

The wireless communication module 260 can provide wireless communication solutions including wireless local area network (Wireless Local Area Network, WLAN) applied on the electronic device 700, such as Wi-Fi network, BT, Global Navigation Satellite System (Global Navigation Satellite System, GNSS ), FM (Frequency Modulation, FM), NFC, infrared technology (infrared, IR). The wireless communication module 260 may be one or more devices integrating at least one communication processing module. The wireless communication module 260 receives electromagnetic waves via the antenna 262 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 210 . The wireless communication module 260 can also receive the signal to be transmitted from the processor 210 , frequency-modulate and amplify it, and convert it into electromagnetic waves through the antenna 262 for radiation.

In some scenarios, the antenna 252 of the electronic device 700 is coupled to the mobile communication module 250, and the antenna 262 is coupled to the wireless communication module 260, so that the electronic device 700 can communicate with the network and/or other devices through wireless communication technology. The wireless communication technologies here can include Global System For Mobile Communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), broadband Code Division Multiple Access (WCDMA), Time-Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technologies, etc.

GNSS can include Global Positioning System (Global Positioning System, GPS), Global Navigation Satellite System (Global Navigation Satellite System, GLONASS), BeiDou Navigation Satellite System (BDS), Quasi-Zenith Satellite System (Quasi-Zenith Satellite System, QZSS) and/or Satellite Based Augmentation Systems (SBAS).

The electronic device 700 realizes the display function through the GPU, the display screen 220 , and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 220 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. Processor 210 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 220 is used for displaying text, images, videos and the like. The display screen 220 includes a display panel, and the display panel can be a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), an active matrix organic light-emitting diode or an active matrix organic light-emitting diode. Body (Active-Matrix Organic Light Emitting Diode, AMOLED), Flexible Light-Emitting Diode (Flex Light-Emitting Diode, FLED) Mini-LED, Micro-LED, Micro-OLED, Quantum Dot Light Emitting Diodes (QLED) Wait. In some scenarios, the electronic device 700 may include one or more display screens 220 .

The electronic device 700 can realize the shooting function through the ISP, the camera 222 , the video codec, the GPU, the display screen 220 , and the application processor.

The ISP is used for processing data fed back by the camera 222 . For example, when taking a picture, open the shutter, the light is transmitted to the photosensitive element of the camera through the lens, and the light signal is converted into an electrical signal, and the photosensitive element of the camera transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye. ISP can also perform algorithm optimization on image noise, brightness, and skin color. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some scenarios, the ISP may be located in the camera 222 .

Camera 222 is used to capture still images or video. The object generates an optical image through the lens and projects it to the photosensitive element. The photosensitive element can be a charge coupled device (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide-Semiconductor, CMOS) phototransistor. The photosensitive element converts the light signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. DSP converts digital image signals into standard RGB, YUV and other image signals. In some scenarios, the electronic device 700 may include one or more cameras 222 .

Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals. For example, when the electronic device 700 selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point.

Video codecs are used to compress or decompress digital video. Electronic device 700 may support one or more video codecs. In this way, the electronic device 700 can play or record videos in various encoding formats, for example, moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.

NPU is a neural network (Neural-Network, NN) computing processor. By referring to the structure of biological neural networks, such as the transmission mode between neurons in the human brain, it can quickly process input information and continuously learn by itself. Applications such as intelligent cognition of the electronic device 700 can be realized through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.

The indicator 224 can be an indicator light, and can be used to indicate charging status, power change, and can also be used to indicate messages, missed calls, notifications, and the like.

The motor 226 can generate a vibrating alert. The motor 226 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations applied to different applications (such as taking pictures, playing audio, etc.) may correspond to different vibration feedback effects. The motor 226 can also correspond to different vibration feedback effects for touch operations acting on different areas of the display screen 20 . Different application scenarios (for example: time reminder, receiving information, alarm clock, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

The keys 228 include a power key, a volume key and the like. The button 228 can be a mechanical button or a touch button. The electronic device 700 may receive key input and generate key signal input related to user settings and function control of the electronic device 700 .

The SIM card interface 294 is used for connecting a SIM card. The SIM card can be connected and separated from the electronic device 700 by inserting it into the SIM card interface 294 or pulling it out from the SIM card interface 294 . The electronic device 700 may support one or more SIM card interfaces 294 . SIM card interface 294 can support Nano SIM card, Micro SIM card, mini SIM card etc. Multiple cards can be inserted into the same SIM card interface 294 at the same time, and the types of multiple cards can be the same or different. The SIM card interface 294 is also compatible with different types of SIM cards. The SIM card interface 294 is also compatible with external memory cards. The electronic device 700 interacts with the network through the SIM card to implement functions such as calling and data communication. In some scenarios, the electronic device 700 uses an embedded SIM (embedded SIM, eSIM) card, and the eSIM card can be embedded in the electronic device 700 and cannot be separated from the electronic device 700.

The external memory interface 292 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 700. The external memory card communicates with the processor 210 through the external memory interface 292 to realize the data storage function. Such as saving music, video and other files in the external memory card.

Internal memory 296 may be used to store computer-executable program code, which includes instructions. The internal memory 296 may include an area for storing programs and an area for storing data. Wherein, the storage program area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function) and the like. The storage data area can store data (such as audio data, phone book) etc. created during the use of the electronic device 700 . In addition, the internal memory 296 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (Universal Flash Storage, UFS) and the like. The processor 210 executes various functional applications and data processing of the electronic device 700 by executing instructions stored in the internal memory 296 and/or instructions stored in a memory provided in the processor.

The electronic device 700 may implement audio functions through the audio module 270 , the speaker 272 , the receiver 274 , the microphone 276 , the earphone interface 278 , and the application processor. Such as music playback, recording, etc.

The audio module 270 is used to convert digital audio signals into analog audio signals for output, and is also used for converting analog audio input into digital audio signals. The audio module 270 may also be used to encode and decode audio signals. In some scenarios, the audio module 270 may be set in the processor 210 , or some functional modules of the audio module 270 may be set in the processor 210 .

Receiver 274, also called "earpiece", is used to convert audio electrical signals into audio signals. When the electronic device 700 receives a call or a voice message, the receiver 274 can be placed close to the human ear to listen to the voice.

Microphone 276, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can make a sound by approaching the microphone 276 with a human mouth, and input the sound signal to the microphone 276 . The electronic device 700 may be provided with at least one microphone 276 . For example, the electronic device 700 can be provided with two microphones 276, which can also implement a noise reduction function in addition to collecting sound signals. For example, the electronic device 700 can also be provided with three, four or more microphones 276 to collect sound signals, reduce noise, identify sound sources, and realize directional recording functions, etc.

The earphone interface 278 is used for connecting wired earphones. The headphone interface 278 can be a USB interface 230, or a 3.5mm open mobile terminal platform (open mobile terminal platform, OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface, etc. .

The pressure sensor 2802 is used to sense the pressure signal and convert the pressure signal into an electrical signal. In some scenarios, the pressure sensor 2802 may be disposed on the display screen 220 . The type of the pressure sensor 2802 may be a resistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, and the like. A capacitive pressure sensor may be comprised of at least two parallel plates with conductive material. When a force is applied to the pressure sensor 2802, the capacitance between the electrodes changes. The electronic device 700 determines the intensity of the pressure from the change in capacitance. When a touch operation acts on the display screen 220 , the electronic device 700 detects the intensity of the touch operation according to the pressure sensor 2802 . The electronic device 700 may also calculate the touch position according to the detection signal of the pressure sensor 2802 . In some scenarios, touch operations acting on the same touch position but with different touch operation intensities may correspond to different operation instructions. For example, when a touch operation whose intensity is less than the first pressure threshold acts on an image or file, it means that the image or file is selected, and the electronic device 700 executes an instruction that the image or file is selected. When a touch operation whose intensity is greater than or equal to the first pressure threshold acts on the application window and the touch operation moves on the display screen 220 , an instruction to drag the application window up is executed. For example, when a touch operation whose intensity is less than the first pressure threshold acts on the short message application icon, the instruction of viewing the short message is executed. When a touch operation whose intensity is greater than or equal to the first pressure threshold acts on the icon of the short message application, the instruction of creating a new short message is executed.

The gyro sensor 2804 can be used to determine the motion posture of the electronic device 700 .

Air pressure sensor 2806 may be used to measure air pressure.

The magnetic sensor 2808 includes a Hall sensor. The electronic device 700 can use the magnetic sensor 2808 to detect the opening and closing of the flip holster.

The acceleration sensor 2810 can be used to detect the acceleration of the electronic device 700 in various directions (generally three axes).

A distance sensor 2812 may be used to measure distance. The electronic device 700 can measure the distance by infrared or laser. In a scene such as shooting, the electronic device 700 can use the distance sensor 2812 to measure a distance to achieve fast focusing.

Proximity light sensor 2814 may include, for example, LEDs and light detectors, such as photodiodes. The light emitting diodes may be infrared light emitting diodes. The electronic device 700 emits infrared light through a light emitting diode, and uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it may be determined that there is an object near the electronic device 700 . When insufficient reflected light is detected, the electronic device 700 may determine that there is no object nearby. The electronic device 700 can use the proximity light sensor 2814 to detect that the user holds the electronic device 700 close to the ear to make a call, so as to automatically turn off the display screen 220 to save power. Proximity light sensor 2814 can also be used in leather case mode, automatic unlock and lock screen in pocket mode.

Fingerprint sensor 2816 may be used to capture fingerprints. The electronic device 700 can use the collected fingerprint characteristics to implement fingerprint unlocking, access to application locks, fingerprint photography, and fingerprint answering of incoming calls.

A temperature sensor 2818 may be used to detect temperature.

The touch sensor 2820 is also called "touch device" or "touch panel". The touch sensor 2820 can be disposed on the display screen 220 , and the touch sensor 2820 and the display screen 220 form a touch screen. The touch sensor 2820 is used to detect a touch operation on or near it. The touch sensor 2820 can transmit the detected touch operation to the application processor to determine the type of the touch event. Visual output related to the touch operation can be provided through the display screen 220 . In other scenarios, the touch sensor 2820 may also be disposed on the surface of the electronic device 700 , which is different from the position of the display screen 220 .

The ambient light sensor 2822 is used for sensing ambient light brightness. The electronic device 700 can adaptively adjust the brightness of the display screen 220 according to the perceived ambient light brightness. The ambient light sensor 2822 can also be used to automatically adjust the white balance when taking pictures. The ambient light sensor 2822 can also cooperate with the proximity light sensor 2814 to detect whether the electronic device 700 is in the pocket, so as to prevent accidental touch.

Optionally, the sensor module 280 may further include an infrared sensor, an ultrasonic sensor, an electric field sensor, etc., for assisting the electronic device 700 in recognizing gestures in the air.

It should be understood that the electronic device 700 in FIG. 7 is only schematic, and it may include more or less components when it is implemented as a different type of device. For example, when the electronic device 700 is implemented as a desktop computer, it may not have the SIM card interface 294 .

The software system of the electronic device 700 may adopt a layered architecture, a Harmony OS architecture, an event-driven architecture, a micro-kernel architecture, a micro-service architecture, or a cloud architecture.

FIG. 8 shows a software structural block diagram of an electronic device 700 with a layered architecture Android (Android) system according to an embodiment of the present disclosure.

The layered architecture divides the software into several layers, and each layer has a clear role and division of labor. Layers communicate through software interfaces. As shown in FIG. 8 , the Android system can be divided into four layers, which are an application program layer 810 , an application program framework layer 820 , a kernel layer 830 , and a network transport layer 840 from top to bottom.

The application layer 810 may include a series of application packages, including but not limited to camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, short message and other applications (Application, APP).

The application framework layer 820 provides an application programming interface (Application Programming Interface, API) and a programming framework for the applications of the application program layer 810. The application framework layer 820 may include some predefined functions, including but not limited to window manager, content provider, view system, telephony manager, resource manager, notification manager and so on.

A window manager is used to manage window programs. The window manager can get the size of the display screen, determine whether there is a status bar, lock the screen, capture the screen, etc.

Content providers are used to store and retrieve data and make it accessible to applications. Data can include video, images, audio, calls made and received, browsing history and bookmarks, phonebook, and more.

The view system includes visual controls, such as controls for displaying text, controls for displaying pictures, and so on. The view system can be used to build applications. A display interface can consist of one or more views. For example, a display interface including a text message notification icon may include a view for displaying text and a view for displaying pictures.

The phone manager is used to provide communication functions of the electronic device 700 . For example, the management of call status (including connected, hung up, etc.).

The resource manager provides various resources for the application, such as localized strings, icons, pictures, layout files, video files, and so on.

The notification manager enables the application to display notification information in the status bar, which can be used to convey notification-type messages, and can automatically disappear after a short stay without user interaction. The notification manager is used to notify download completion, message reminders, etc. The notification manager can also be a notification that appears on the top status bar of the system in the form of a chart or scroll bar text, such as a notification of an application running in the background, or a notification that appears on the screen in the form of a dialog window. For example, text information is prompted in the status bar, a prompt sound is issued, the electronic device 700 vibrates, and the indicator light flashes.

The kernel layer 830 includes at least a display driver, a camera driver, an audio driver, and a transmission driver. Different drivers of the kernel layer 830 are used to call hardware devices of the electronic device 700 to perform corresponding operations. For example, the display driver is used to support the interface display of the electronic device 700, etc., the audio driver is used to support the playing audio of the electronic device 700, etc., and the transmission driver is used to support content sharing between the electronic device 700 and another electronic device.

The network transport layer 840 may be used for communication, data transmission, and the like between the electronic device 700 and another electronic device. It may include: a Bluetooth module, a Wi-Fi module, an NFC module, a discovery connection module, a pairing module, and a connection transmission module. The discovery connection module can be used to discover another electronic device that can establish a communication connection. The pairing module can be used to authenticate another electronic device that requests to establish a connection during the process of establishing a communication connection. The connection transmission module can be used to transmit data or messages, instructions, etc. with another electronic device that has established a connection.

It should be understood that the above-mentioned electronic device 700 is only illustrative, and should not be interpreted as limiting the following embodiments of the present disclosure.

Claims (10)

1. A method for channel selection, characterized by comprising:

   The first terminal device establishes a communication service with the second terminal device through the first channel;

   acquiring quality information of the first channel;

   determining that the quality of the first channel indicated by the quality information is lower than a threshold; and

   switching the communication traffic from the first channel to a second channel.
2. The method according to claim 1, wherein switching the communication service from the first channel to the second channel comprises:

   The first terminal device acquires quality information of a plurality of candidate channels, the plurality of candidate channels including the second channel; and

   The first terminal device switches the communication service from the first channel to the second channel based at least on the quality information of the plurality of candidate channels.
3. The method according to claim 1 or 2, wherein switching the communication service from the first channel to the second channel comprises:

   The first terminal device receives quality information of a first subset of a plurality of candidate channels from the second terminal device;

   the first terminal device determines quality information for a second subset of the plurality of candidate channels; and

   The first terminal device selects the first subset from the intersection of the first subset and the second subset based on the quality information of the first subset and the quality information of the second subset. Describe the second channel.
4. The method according to claim 2 or 3, wherein obtaining the quality information of the plurality of candidate channels comprises:

   The first terminal device determines first quality information of the plurality of candidate channels;

   The first terminal device receives second quality information of the plurality of candidate channels from a third terminal device;

   The first terminal device updates the first quality information based on the second quality information; and

   The updated first quality information is used as the quality information.
5. The method according to any one of claims 2 to 4, wherein the method further comprises:

   In response to the fourth terminal device joining the communication network where the first terminal device is located, the first terminal device sends the quality information to the fourth terminal device.
6. The method according to any one of claims 1 to 5, characterized in that the threshold value is associated with the type of communication traffic.
7. The method according to any one of claims 1 to 6, wherein switching the communication service from the first channel to the second channel comprises:

   The first terminal device reduces the quality of the communication service;

   reacquiring the quality information of the first channel after a predetermined period of time;

   determining that the quality of the first channel indicated by the reacquired quality information is lower than the threshold; and

   The first terminal device switches the communication service from the first channel to a second channel.
8. An electronic device, characterized in that the electronic device comprises:

   one or more processors; and

   memory;

   Wherein, one or more computer programs are stored in the memory, and the one or more computer programs include instructions. When the instructions are executed by the electronic device, the electronic device executes the electronic device according to claims 1-7. any one of the methods described.
9. A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, and it is characterized in that, when the instructions are run on the electronic device, the electronic device is made to execute any one of claims 1-7. method described in the item.
10. A chip comprising processing circuitry configured to perform the method according to any one of claims 1-7.

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