CN111432392A - Method for improving input stability of Bluetooth human-computer interaction equipment - Google Patents
Method for improving input stability of Bluetooth human-computer interaction equipment Download PDFInfo
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- CN111432392A CN111432392A CN202010278903.1A CN202010278903A CN111432392A CN 111432392 A CN111432392 A CN 111432392A CN 202010278903 A CN202010278903 A CN 202010278903A CN 111432392 A CN111432392 A CN 111432392A
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- bluetooth
- human
- computer interaction
- hid
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
Abstract
The invention discloses a method for improving input stability of Bluetooth HID (human interface device), belonging to the technical field of Bluetooth wireless communication. The method for improving the input stability of the Bluetooth HID equipment comprises the following steps: initializing; establishing connection; a step of reconnection, in which the connection of the Bluetooth HID input equipment and the Bluetooth central equipment fails or is disconnected, and the Bluetooth HID input equipment is periodically reconnected; and a monitoring step; and a judging step, if the RSSI is less than or equal to the product of the effective RSSI and the first threshold, the HID report is forbidden to be sent, if the RSSI is more than or equal to the product of the effective RSSI and the second threshold, the HID report is allowed to be sent, and if the RSSI is more than the product of the effective RSSI and the first threshold and is less than the product of the effective RSSI and the second threshold, whether the two Bluetooth devices are connected or not is judged. The method and the device avoid the wrong input of the Bluetooth HID key value before and after the Bluetooth disconnection when the two Bluetooth devices are far away.
Description
Technical Field
The invention relates to the technical field of Bluetooth wireless communication, in particular to a method for improving input stability of Bluetooth human-computer interaction equipment.
Background
In the existing bluetooth Human Interface (HID) input, when the bluetooth HID input device is far away from the bluetooth center device, the bluetooth connection between the two devices may be disconnected at any time. Before disconnection, if the Bluetooth HID input device presses a key, the Bluetooth HID input device sends a key value to the Bluetooth central device, and if the bottom layer of the Bluetooth central device does not monitor the key input lifted, the key value is automatically and repeatedly sent to an upper application program. Before the key is lifted up, the distance between the Bluetooth HID input device and the Bluetooth central device exceeds the effective range of Bluetooth communication, so that the Bluetooth connection is disconnected, and at the moment, the bottom layer of the Bluetooth central device can always send repeated keys to an upper application program, so that the HID key value is input wrongly.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for improving the input stability of the Bluetooth human-computer interaction device is provided, and the error input of a Bluetooth human-computer interaction key value caused before and after the disconnection of the Bluetooth is avoided when two Bluetooth devices are far away by monitoring the Bluetooth signal intensity in real time.
In order to achieve the above purpose, the invention adopts a technical scheme that: the method for improving the input stability of the Bluetooth human-computer interaction device comprises the following steps: initializing, namely initializing the Bluetooth human-computer interaction input equipment and forbidding sending of a human-computer interaction report; the method comprises the steps of establishing connection, namely establishing connection between a Bluetooth man-machine interaction input device and Bluetooth central equipment through Bluetooth, and performing reconnection, wherein if the connection between the Bluetooth man-machine interaction input device and the Bluetooth central equipment fails or is disconnected, the Bluetooth man-machine interaction input device and the Bluetooth central equipment which has failed or is disconnected last time execute the step of establishing connection within preset time; after the Bluetooth man-machine interaction input device is successfully connected with the Bluetooth central device, the Bluetooth man-machine interaction input device monitors the Bluetooth signal intensity of the Bluetooth central device in real time; a judging step, if the Bluetooth signal intensity is less than or equal to the product of the effective Bluetooth signal intensity and a first threshold value, the Bluetooth man-machine interaction input device forbids sending a man-machine interaction report, wherein the man-machine interaction report comprises a man-machine interaction key value, if the Bluetooth signal intensity is greater than or equal to the product of the effective Bluetooth signal intensity and a second threshold value, the Bluetooth man-machine interaction input device allows sending the man-machine interaction report, if the Bluetooth signal intensity is greater than the product of the effective Bluetooth signal intensity and the first threshold value and less than the product of the effective Bluetooth signal intensity and the second threshold value, whether the connection between the Bluetooth man-machine interaction input device and the Bluetooth central device is established is judged, and if the connection between the Bluetooth man-machine interaction input device and the Bluetooth central device is successful, the; if the Bluetooth human-computer interaction input device is disconnected with the Bluetooth central device, the Bluetooth human-computer interaction input device sequentially executes the connection establishing step, the monitoring step and the judging step, wherein the first threshold value is smaller than the second threshold value, the first threshold value and the second threshold value are values obtained by inference according to the stability of the Bluetooth signal intensity under an actual test state, and the effective Bluetooth signal intensity is a value preset according to the self condition of the Bluetooth central device.
The second technical scheme adopted by the invention is as follows: a computer readable storage medium storing computer instructions, wherein the computer instructions are operable to perform the method for improving input stability of a bluetooth human-machine interaction device in the first aspect.
The third technical scheme adopted by the invention is as follows: a computer device comprises a processor and a memory, wherein the memory stores computer instructions, and the processor operates the computer instructions to execute the method for improving the input stability of the Bluetooth human-computer interaction device in the first scheme.
The invention has the beneficial effects that: the Bluetooth man-machine interaction input device monitors the Bluetooth signal intensity of the Bluetooth central device in real time, so that the distance between the two Bluetooth devices can be judged, when the distance between the two Bluetooth devices is far, a Bluetooth link is disconnected, the report of a man-machine interaction key value is forbidden, and the wrong input of the Bluetooth man-machine interaction is avoided.
Drawings
FIG. 1 is a schematic process diagram of a method for improving input stability of a Bluetooth human-computer interaction device according to the present invention;
FIG. 2 is a schematic diagram of the transmission and reception of the method for improving the input stability of the Bluetooth human-computer interaction device according to the present invention;
FIG. 3 is a flowchart illustrating a method for improving input stability of a Bluetooth human-computer interaction device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. The detailed description is merely intended to facilitate an understanding of the invention, and the scope of the invention is not limited to the specific description in the specific embodiments.
It is noted that the terms first and second in the claims, description and abstract of this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Fig. 1 shows a specific embodiment of the method for improving input stability of a bluetooth human-computer interaction device, in which the method mainly includes the following steps:
step S101: and (5) initializing.
In one embodiment of the present invention, as shown in FIG. 3, the Bluetooth HID input device first initializes and disables HID reporting.
The Bluetooth HID input device is a device conforming to the HID category specification, and can be a Bluetooth keyboard, a Bluetooth mouse, a Bluetooth scanning gun or a Bluetooth joystick and the like.
Bluetooth HID defines the protocol, features and usage procedures of bluetooth in human interface devices. The protocol is adapted from the USB HID protocol. The bluetooth HID specification is based on the USB HID specification, otherwise problems arise with device drivers, compatibility, etc. Three types of HID reports are supported in bluetooth HID devices: inputs, outputs, and features. In the Bluetooth, an input report indicates that the Bluetooth HID input device sends data to the Bluetooth central device, an output report indicates that the Bluetooth central device sends data to the Bluetooth HID input device, and a characteristic report is transmitted through a bidirectional data channel. The HID protocol establishes two channels, a control channel on which reports can be transmitted and an interrupt channel on which reports are transmitted, called synchronous reports and asynchronous reports. The feature report is obtained by a get report or a set report request. And the bluetooth hub device supports at least one of a reporting protocol mode or a start protocol mode, while the bluetooth HID input device needs to support the reporting protocol mode, and the reporting protocol mode is a default mode of the bluetooth HID device.
Step S102: and establishing a connection.
In the specific embodiment, the Bluetooth HID input device initiates broadcasting, then the Bluetooth center device is paired or bound with the Bluetooth HID input device, and finally the Bluetooth center device is connected with the Bluetooth HID input device to realize data communication; the purpose of this step is to make possible the transmission of data.
The Bluetooth center equipment can be a computer, an iPad or a mobile phone and the like.
In the prior art, the HID application mode in bluetooth technology allows people to control computers, game levers, remote monitoring devices, etc. without wiring annoyance. For example, unlike a conventional wireless keyboard that can only communicate with devices that are compatible with each other, a Bluetooth HID keyboard can communicate with any Bluetooth HID system as a standard keyboard. The bluetooth HID solution enables HID end devices to automatically detect and connect to required systems, such as Windows, IOS, Android, etc. The Bluetooth HID keyboard can be used for a Windows system and also can be used for iPad and iPhone of an IOS system; the method can also be used for tablets, mobile phones and the like of an Android system; rather than a peripheral being able to control only a particular host to which it is matched, as in the conventional model. Therefore, the bluetooth HID specification enables true interoperability of input and control peripherals of different platform HID hosts.
Step S103: and (5) a connecting step.
In the specific implementation mode, when the connection between the bluetooth HID input device and the bluetooth center device fails or is disconnected or the bluetooth HID input device monitors that the RSSI value is small or unstable, the two bluetooth devices may be disconnected at any time, and when the connection between the two bluetooth devices fails or is disconnected, the bluetooth HID input device enters a broadcast mode and actively returns to the bluetooth center device which has failed or is disconnected last time within a preset time.
Preferably, the preset time is any one of 5 seconds to 10 seconds. That is, the bluetooth HID input device will connect back to the newly connected or disconnected bluetooth center device every 5 seconds to 10 seconds.
Step S104: and (5) monitoring.
The bluetooth signal strength RSSI represents the signal strength in a wireless network, which decays with increasing distance. The RSSI is too low, which indicates that the signal received by the Bluetooth HID input device is too weak, and the two Bluetooth devices can be disconnected at any time.
In the prior art, when a bluetooth HID input device is scanned by a bluetooth center device, a bottom protocol stack reports an event to an upper layer, and parameters carried by the event include an RSSI, because the RSSI changes during each connection event, after the two devices are connected, a data link layer LL C of the bluetooth center device sends an RSSI query request, a power integrating circuit (physical layer) is started up by LL C, and when the circuit finishes working and prepares data, a completion event is sent to the upper layer, and the RSSI can be obtained through the carried parameters.
In the prior art, the estimated distance between two bluetooth devices can be obtained by the following formula: d = 10^ (abs (RSSI) -A)/(10 × n)), wherein: d represents the calculated distance, RSSI represents the received signal strength (negative), a represents the signal strength at 1 meter separation between the transmitting and receiving ends, and n represents the ambient attenuation factor. The A value and the n value can be obtained only by field testing continuously, the environmental attenuation factors of different fields are different, and even the environmental attenuation factors are influenced to a great extent by the obstruction of objects in the same field. However, the default values of the parameters A and n are set at the same site, so that the relative distance between two Bluetooth devices can be roughly calculated.
In this embodiment, the RSSI value is actually measured according to the currently used bluetooth center device. For example, the RSSI is converted to 100 dBm by the open distance of 1 meter for stable connection, the RSSI is 0 by the open distance for unstable connection (10 times of connection, two or more failures), and the middle is linearly taken by the distance, thereby forming a linear graph of the RSSI and the distance. After the bluetooth HID input device and the bluetooth center device are successfully connected, as shown in fig. 2, the bluetooth HID input device monitors the RSSI value of the bluetooth center device in real time. From the linear graph formed above, the distance between the two devices is known. The purpose of this step is to determine the distance between two bluetooth devices based on the difference in RSSI values. And if the connection between the Bluetooth HID input device and the Bluetooth center device fails or is disconnected, executing a back connection step.
Step S105: and (5) judging.
The data is sent in reports, in USB the data is sent and received by various "endpoints", and in bluetooth the HID's report data is transmitted and received by various features under the HID service.
In this embodiment, if the monitored bluetooth signal intensity is less than or equal to the product of the effective bluetooth signal intensity and the first threshold, it indicates that the two bluetooth devices are far apart from each other, and may be disconnected or disconnected. At this time, the HID report function is not called, even if the user has key input in the process, the Bluetooth HID input device does not send the HID key value report, namely the Bluetooth HID input device prohibits sending the HID report, wherein the HID report contains the HID key value, and therefore wrong input of the HID key value is avoided. And if the Bluetooth HID input equipment is disconnected with the Bluetooth central equipment at the moment, the Bluetooth HID input equipment enters the reconnection step again, and then the monitoring step and the judging step are carried out.
If the monitored Bluetooth signal intensity of the Bluetooth HID input device is larger than or equal to the product of the effective Bluetooth signal intensity and the second threshold value, the fact that the two Bluetooth devices are close to each other and stable in connection is indicated, and at the moment, the HID report function is called through a program, the fact that the Bluetooth HID input device sends an HID key value report is achieved, and therefore the two Bluetooth devices achieve interoperability. And if the Bluetooth HID input equipment is disconnected with the Bluetooth central equipment, the Bluetooth HID input equipment enters the reconnection step again, and then the monitoring step and the judging step are carried out.
If the monitored Bluetooth signal intensity of the Bluetooth HID input device is greater than the product of the effective Bluetooth signal intensity and the first threshold value and less than the product of the effective Bluetooth signal intensity and the second threshold value, the Bluetooth signal is not stable, at this time, whether the Bluetooth HID input device is connected with the Bluetooth central device or not needs to be judged, if the Bluetooth HID input device is successfully connected with the Bluetooth central device, the monitoring step and the judging step are executed again in sequence, and if the Bluetooth HID input device is disconnected with the Bluetooth central device, the connection establishing step, the monitoring step and the judging step are executed in sequence.
The first threshold is smaller than the second threshold, and the first threshold and the second threshold are values inferred according to the stability of the Bluetooth signal intensity in an actual test state. Preferably, the first threshold value is 0.2 and the second threshold value is 0.25. The effective RSSI value is a value preset according to the self condition of the bluetooth center device, and is a relatively stable signal value in the bluetooth center device.
In the invention, the relative distance between the two Bluetooth devices is judged by monitoring the RSSI in real time, so that the input of the HID key value is controlled, and the wrong input of the HID key value is avoided.
The various illustrative logics, logical blocks, modules described in this disclosure as a method of improving input stability for a bluetooth human machine interaction device may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the methods of dynamically negotiating bluetooth connection intervals herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The method for improving the input stability of the Bluetooth human-computer interaction device can be directly implemented in hardware, in a software module executed by a processor or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
Therefore, the present invention is not limited to the embodiments, and all equivalent structural changes made by the contents of the specification and the drawings, or other related technical fields, can be directly or indirectly applied to the other related technical fields.
Claims (9)
1. A method for improving input stability of Bluetooth human-computer interaction equipment is characterized by comprising the following steps:
initializing, namely initializing the Bluetooth human-computer interaction input equipment and forbidding sending of a human-computer interaction report;
establishing connection, namely establishing connection between the Bluetooth human-computer interaction input equipment and Bluetooth central equipment through Bluetooth;
a connection step, wherein if the connection between the Bluetooth human-computer interaction input device and the Bluetooth central device fails or is disconnected, the Bluetooth human-computer interaction input device and the Bluetooth central device which has failed or is disconnected last time execute the connection establishment step within a preset time; and
monitoring, wherein after the Bluetooth man-machine interaction input device is successfully connected with the Bluetooth central device, the Bluetooth man-machine interaction input device monitors the Bluetooth signal intensity of the Bluetooth central device in real time;
a judging step, if the Bluetooth signal intensity is less than or equal to the product of the effective Bluetooth signal intensity and a first threshold value, the Bluetooth human-computer interaction input device forbids to send the human-computer interaction report, wherein the human-computer interaction report comprises a human-computer interaction key value,
if the Bluetooth signal intensity is larger than or equal to the product of the effective Bluetooth signal intensity and a second threshold value, the Bluetooth human-computer interaction input device allows the human-computer interaction report to be sent,
if the Bluetooth signal intensity is larger than the product of the effective Bluetooth signal intensity and the first threshold value and smaller than the product of the effective Bluetooth signal intensity and the second threshold value, judging whether the Bluetooth man-machine interaction input equipment and the Bluetooth central equipment are connected or not,
if the connection between the Bluetooth human-computer interaction input equipment and the Bluetooth central equipment is successful, the monitoring step and the judging step are executed again in sequence;
if the Bluetooth human-computer interaction input device is disconnected with the Bluetooth central device, the Bluetooth human-computer interaction input device sequentially executes the reconnection step, the monitoring step and the judging step,
the first threshold is smaller than the second threshold, the first threshold and the second threshold are values inferred according to the stability of the bluetooth signal strength in an actual test state, and the effective bluetooth signal strength is a value preset according to the self condition of the bluetooth center device.
2. The method for improving input stability of a Bluetooth human-computer interaction device as claimed in claim 1, wherein the preset time is any one of 5 seconds to 10 seconds.
3. The method of claim 1, wherein the human-computer interaction report is sent by calling a human-computer interaction report function.
4. The method of claim 1, wherein the first threshold is 0.2 and the second threshold is 0.25.
5. The method according to claim 1, wherein the connection step is performed by initiating a broadcast by the bluetooth human-machine interaction input device, pairing or binding the bluetooth central device with the bluetooth human-machine interaction input device, and finally establishing a connection between the bluetooth central device and the bluetooth human-machine interaction input device.
6. The method for improving input stability of a Bluetooth human-computer interaction device according to claim 1, wherein the Bluetooth human-computer interaction input device comprises a Bluetooth keyboard, a Bluetooth mouse, a Bluetooth scanning gun and a Bluetooth joystick.
7. The method of claim 1, wherein the bluetooth central device comprises a computer, an iPad and a mobile phone.
8. A computer readable storage medium storing computer instructions, wherein the computer instructions are operable to perform the method for improving input stability of a bluetooth human interface device according to any one of claims 1 to 7.
9. A computer device comprising a processor and a memory, the memory storing computer instructions, wherein:
the processor operates the computer instructions to perform the method of improving input stability of a bluetooth human interaction device of any one of claims 1 to 7.
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| US20160261145A1 (en) * | 2013-10-28 | 2016-09-08 | Kyocera Corporation | Control apparatus |
| CN107635272A (en) * | 2017-10-12 | 2018-01-26 | 北京小米移动软件有限公司 | Control method of electronic device and device |
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- 2020-04-10 CN CN202010278903.1A patent/CN111432392B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626258A (en) * | 2008-07-08 | 2010-01-13 | 深圳市邦华电子有限公司 | Mobile phone with one-key Bluetooth function |
| US20160261145A1 (en) * | 2013-10-28 | 2016-09-08 | Kyocera Corporation | Control apparatus |
| CN104967892A (en) * | 2015-06-30 | 2015-10-07 | 青岛海信电器股份有限公司 | Remote controller data transmitting and receiving methods and device |
| CN107635272A (en) * | 2017-10-12 | 2018-01-26 | 北京小米移动软件有限公司 | Control method of electronic device and device |
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