CN109873917B - Wireless image transmission communication method, device, image transmission equipment and system - Google Patents
Wireless image transmission communication method, device, image transmission equipment and system Download PDFInfo
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- CN109873917B CN109873917B CN201910217876.4A CN201910217876A CN109873917B CN 109873917 B CN109873917 B CN 109873917B CN 201910217876 A CN201910217876 A CN 201910217876A CN 109873917 B CN109873917 B CN 109873917B
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Abstract
The application provides a wireless image transmission communication method, a device, an image transmission device and a system, wherein the method comprises the following steps: if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency point; the channel quality of the available image transmission frequency points accords with the preset image transmission condition; if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions. The problem of the poor transmission stability of wireless picture biography among the correlation technique has effectively been solved to this application, guarantees the transmission stability of wireless picture biography.
Description
Technical Field
The present application relates to the field of image transmission, and in particular, to a wireless image transmission communication method, device, image transmission device, and system.
Background
Wireless map transmission may be understood as the transmission of wireless images. At present, the application systems of wireless image transmission include: analog transmission, data transmission/network Radio, GSM (Global System for Mobile Communications)/GPRS (General Packet Radio Service), CDMA (Code division multiple access), digital microwave (mostly spread spectrum microwave), WLAN (wireless network), COFDM (orthogonal frequency division multiplexing), and the like. The wireless image transmission technology is widely applied to the fields of monitoring, film and television shooting, unmanned aerial vehicle aerial photography and the like. Referring to fig. 1, the main components of a wireless map-based communication system generally include: the system comprises an image acquisition end (such as a camera), an image transmission and transmission system, an image transmission and reception system and an image transmission and transmission system.
The existing wireless image transmission communication system comprises a wireless image transmission communication system which carries out communication at a fixed frequency, such as a WIFI image transmission communication system, and a wireless image transmission communication system which carries out communication based on a frequency hopping technology, such as a Bluetooth wireless image transmission communication system; the WIFI map-based communication system has an ACS (automatic frequency selection) function, can screen optimal frequency points when being started, and comprises an AP (access point) and an STA (station), wherein after the STA is connected with the AP, image or audio and video transmission and other signaling interaction are carried out based on the wireless link and the screened optimal frequency points; the bluetooth wireless image transmission communication system uses frequency hopping technology, the carrier frequency of frequency hopping is controlled by a pseudo-random code, and the frequency synthesizer continuously changes the frequency according to the random rule of the pseudo-random code (PN code) in the working bandwidth range, so that the hopping frequency is used for image or audio-video transmission and other signaling interaction.
In the process of implementing the invention, the inventor finds that: the wireless image transmission communication system which carries out communication at fixed frequency has weak anti-interference capability; although a wireless image transmission communication system for communication based on a frequency hopping technology has a certain anti-interference capability, the wireless image transmission communication system can only carry out communication based on the frequency selected by the random rule of the pseudo-random code, and the random rule of the pseudo-random code cannot reflect the channel condition of the selected frequency in the actual communication process, and the channel resource of the selected frequency is occupied in the actual use process, so that the communication between a sending end and a receiving end is blocked, and the transmission stability of wireless image transmission is influenced.
Disclosure of Invention
In view of the above, the present application provides a wireless image transmission communication method, apparatus, image transmission device and system.
First, a first aspect of the present application provides a wireless map transmission communication method, which is applied to a map transmission device supporting a TDMA, wherein a period of the TDMA is divided into a map transmission timeslot and a signaling timeslot, and the method includes:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
Optionally, the determining available frequency hopping points from designated frequency hopping points in a frequency band corresponding to the available frequency hopping points includes:
sequentially detecting the channels of the appointed frequency hopping points based on the frequency hopping path until available frequency hopping points are obtained; the frequency hopping path is determined by a pre-generated pseudo random code.
Optionally, the method further comprises:
and periodically detecting channels of other image transmission frequency points except the available image transmission frequency point, and recording the image transmission frequency points with the channel quality meeting the preset image transmission condition as standby image transmission frequency points, so that when the channel quality of the available image transmission frequency points does not meet the preset image transmission condition, a new available image transmission frequency point is determined from the standby image transmission frequency points.
Optionally, the method is applied to a transmitting end;
the method further comprises the following steps:
if the current time slot is in the signaling time slot and no response message of a receiving end is received within the preset time, acquiring the optimal available frequency hopping point from the designated frequency hopping points; the channel quality of the optimal available frequency hopping point is optimal;
and carrying out signaling transmission based on the optimal available frequency hopping point so as to receive a response message of the receiving end.
Optionally, the signaling time slot is divided into a signaling receiving time slot and a signaling sending time slot;
the method is applied to a receiving end;
the method further comprises:
if the response message of the sending end is not received within the preset time, executing the following steps before sending the response message to the sending end:
and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
According to a second aspect of the embodiments of the present application, there is provided a wireless map transmission communication apparatus, adapted to support TDMA, wherein a period of the TDMA is divided into a map transmission time slot and a signaling time slot, the apparatus includes:
the image transmission module is used for transmitting images based on available image transmission frequency points if the current time slot is in the image transmission time slot; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
a signaling transmission module, configured to determine an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available frequency hopping point if the current time slot is in a signaling time slot, and perform signaling transmission based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
According to a third aspect of embodiments of the present application, there is provided a graph transmission apparatus, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
Optionally, the image transmission device is an image transmission device of a sending end;
the processor is further configured to:
if the current time slot is in the signaling time slot and no response message of a receiving end is received within the preset time, acquiring the optimal available frequency hopping point from the designated frequency hopping points; the channel quality of the optimal available frequency hopping point is optimal;
and carrying out signaling transmission based on the optimal available frequency hopping point so as to receive a response message of the receiving end.
Optionally, the image transmission device is an image transmission device of a receiving end;
the processor is further configured to:
if the response message of the sending end is not received within the preset time, executing the following steps before sending the response message to the sending end:
and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
According to a fourth aspect of the embodiments of the present application, there is also provided a wireless image transmission communication system, including a transmitting end and a receiving end;
the sending end and the receiving end execute:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
Optionally, the sending end is further configured to, if the current time slot is a signaling time slot and a response message of the receiving end is not received within a preset time, obtain an optimal available frequency hopping point from the designated frequency hopping points, and perform signaling transmission based on the optimal available frequency hopping point to receive the response message of the receiving end; the channel quality of the optimal available frequency hopping point is optimal;
the receiving end is further configured to, if the response message of the sending end is not received within a preset time, execute the following steps before sending the response message to the sending end: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the method comprises the steps that a TDMA transmission mode is adopted for data transmission, the period of the TDMA is divided into a picture transmission time slot and a signaling time slot, and if the current picture transmission time slot is in the picture transmission time slot, the picture transmission is carried out based on available picture transmission frequency points; if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; this application embodiment has realized at first confirming the picture frequency point of can passing to further acquire appointed frequency hopping point in the frequency channel that the picture frequency point of can passing corresponds guarantees the preliminary usability of appointed frequency hopping point is followed again further confirms available frequency hopping point in the appointed frequency hopping point, the channel quality at available frequency hopping point accords with and predetermines signaling transmission condition, thereby based on available frequency hopping point carries out signaling transmission, has not only improved interference immunity, guarantees the transmission stability of wireless picture transmission moreover.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Fig. 1 is a diagram of a wireless image transmission communication system provided in the background art;
fig. 2A is a flow chart illustrating an embodiment of a method for wireless map communications according to an exemplary embodiment of the present application;
fig. 2B is a flowchart illustrating a second wireless map transmission communication method according to an exemplary embodiment of the present application;
fig. 3 is a flowchart illustrating a third wireless map transmission communication method according to an exemplary embodiment of the present application;
fig. 4 is an interaction timing diagram of a transmitting end and a receiving end when they are interfered according to an exemplary embodiment of the present application;
fig. 5 is a flowchart illustrating a fourth method for wireless map transmission according to an exemplary embodiment of the present application;
fig. 6 is a schematic diagram illustrating an embodiment of a wireless map communication device according to an exemplary embodiment of the present application;
FIG. 7 is a schematic illustration of an apparatus provided according to an exemplary embodiment of the present application;
fig. 8 is a diagram illustrating a wireless map transmission communication system according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In the related art, a wireless image transmission communication system which carries out communication at a fixed frequency has weak anti-interference capability; although a wireless image transmission communication system for communication based on a frequency hopping technology has a certain anti-interference capability, the wireless image transmission communication system can only carry out communication based on the frequency selected by the random rule of the pseudo-random code, and the random rule of the pseudo-random code cannot reflect the channel condition of the selected frequency in the actual communication process, and the channel resource of the selected frequency is occupied in the actual use process, so that the communication between a sending end and a receiving end is blocked, and the transmission stability of wireless image transmission is influenced.
Based on the problems in the related art, the embodiment of the application provides a wireless image transmission communication method, which can effectively solve the problem of poor transmission stability of wireless image transmission in the related art. Referring to fig. 2A, a flowchart of an embodiment of a wireless image transmission communication method according to an exemplary embodiment of the present application is shown, where the method is suitable for an image transmission device supporting TDMA (Time division multiple access), where the image transmission device may be a technical device with an image wireless transmission function, such as a computer, a mobile phone, a personal tablet, a smart tablet, or a server; the TDMA technique is a communication technique for realizing a shared transmission medium (generally, the radio domain) or a network, which allows a plurality of users to use the same frequency in different time slices (time slots); in the embodiment of the application, the period of the TDMA is divided into a map transmission time slot and a signaling time slot, wherein the map transmission process is in a one-way communication mode, the map transmission time slot at a transmitting end is a map transmission time slot, and the map transmission time slot at a receiving end is a map transmission receiving time slot; in the signaling transmission process, a bidirectional communication mode is adopted, the signaling time slot is divided into a signaling receiving time slot and a signaling sending time slot, and the receiving end and the sending end both comprise the two signaling time slots; it should be noted that, in the wireless image transmission communication process of the embodiment of the present application, data transmission is performed on a radio frequency link.
Referring to fig. 2A, the wireless map transmission communication method includes:
step S101, if the current time slot is in image transmission, image transmission is carried out based on available image transmission frequency points; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition.
Step S102, if the current time slot is in the signaling time slot, determining available frequency hopping points from the designated frequency hopping points in the frequency band corresponding to the available frequency hopping points, and transmitting signaling based on the available frequency hopping points; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
It should be noted that the wireless image transmission communication method of this embodiment may be applied to an image transmission device at a transmitting end, and may also be applied to an image transmission device at a receiving end.
In step S101, the map transmission device determines available map transmission frequency points in advance from designated map transmission frequency points, where the designated map transmission frequency points are obtained based on frequency division of a target frequency spectrum, specifically, after frequency division of the target frequency spectrum, one map transmission frequency point is determined in each frequency band, in an example, as shown in table 1,5 segments are divided in 100M frequency spectrums of 5745-5825, and the map transmission frequency point in each frequency band is determined, where a channel bandwidth corresponding to the map transmission frequency point is 20M.
TABLE 1
| Frequency band (frequency point value) | Bandwidth of | Graph transmission frequency point |
| 5735-5754(5745) | 20M | 5745 |
| 5755-5774(5765) | 20M | 5765 |
| 5775-5794(5785) | 20M | 5785 |
| 5795-5814(5805) | 20M | 5805 |
| 5815-5834(5825) | 20M | 5825 |
Wherein, the determining, by the graph transmission device, available graph transmission frequency points from the graph transmission frequency points comprises: the image transmission equipment scans the frequency points corresponding to all image transmission frequency points to detect the channels of the image transmission frequency points, and the image transmission frequency points with the channel quality meeting the preset image transmission condition are used as available image transmission frequency points; it can be understood that, in the present application, no limitation is imposed on the specific setting of the condition for transmitting the image, and the specific setting may be performed according to an actual situation, for example, the map transmission device may select a map transmission frequency point where the remaining bandwidth resource of the corresponding channel exceeds a preset threshold, such as 85%, 90%, or 95%, as an available map transmission frequency point. In this embodiment, after determining the available map transmission frequency points, the possible determined available map transmission frequency points are greater than or equal to 1, and if the number of the determined available map transmission frequency points is 1, the sending end may send an image based on the available map transmission frequency points and the receiving end may receive an image based on the available map transmission frequency points; if the number of the determined available image transmission frequency points is more than 1, the two communication parties (the sending end and the receiving end) can select the available image transmission frequency points based on a pre-agreed selection rule, so that the two communication parties are ensured to work under the same frequency point, and reliable transmission and stable transmission of image transmission data are ensured; it can be understood that, in the present application, no limitation is imposed on the selection rule, and the selection rule may be specifically set according to actual situations, for example, the first available image transmission frequency point, the last available image transmission frequency point, or the available image transmission frequency point at a specified position may be selected according to the sequence of frequency division from front to back.
In this embodiment, the receiving end sends an image to the receiving end based on the determined available image transmission frequency point when the receiving end is currently in an image transmission sending time slot, and synchronously, the sending end receives the image sent by the sending end based on the determined available image transmission frequency point when the sending end is currently in an image transmission receiving time slot.
In step S102, if the current time slot is in the signaling time slot, the map transmission device determines an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available map transmission point, where the designated frequency hopping point is a target signaling frequency point in the same frequency band as the available map transmission point.
It should be noted that, frequency bands are divided into the target frequency spectrum in advance, and a preset number of signaling frequency points are determined in each frequency band while determining a signaling frequency point in each frequency band, it can be understood that the number of the determined signaling frequency points is not limited in the present application, and may be specifically set according to the actual frequency band division condition, for example, 3 signaling frequency points, 5 signaling frequency points, or 7 signaling frequency points may be divided in one frequency band, in an example, please refer to table 2, 5 segments are divided in 100M frequency spectrum of 5745-5825, and a signaling frequency point in each frequency band is determined, a channel bandwidth corresponding to the signaling frequency point is 20M, 8 signaling frequency points in each frequency band are determined at the same time, and a channel bandwidth corresponding to the signaling frequency point is 2M.
TABLE 2
In this embodiment, the map transmission device takes the signaling frequency point in the frequency band corresponding to the available map transmission frequency point as a designated frequency hopping frequency point, and when the map transmission device is in a signaling time slot, the map transmission device selects an available frequency hopping frequency point from the designated frequency hopping frequency point, wherein the channel quality of the available frequency hopping frequency point meets a preset signaling transmission condition; it can be understood that, in the embodiment of the present application, no limitation is imposed on the setting of the signaling transmission condition, and specific setting may be performed according to actual situations, for example, the map transmission device may use a designated frequency hopping point where the corresponding channel residual bandwidth resource exceeds a preset threshold, such as 90% or 95% as an available frequency hopping point.
In a possible implementation manner, the map transmission device may perform channel detection on all designated frequency hopping points, use the designated frequency hopping points whose channel quality meets preset signaling transmission conditions as available frequency hopping points, where the number of the available frequency hopping points that may be determined is greater than or equal to 1, and if the number of the available frequency hopping points that is determined is 1, the sending end may hop to the available frequency hopping points and perform signaling transmission with the receiving end based on the available frequency hopping points, and the receiving end synchronously hops to the available frequency hopping points and performs signaling transmission with the sending end based on the available frequency hopping points; if the number of the determined available frequency hopping frequency points is more than 1, the two communication parties (the sending end and the receiving end) can select the available frequency hopping frequency points based on a pre-agreed signaling selection rule, so that the two communication parties are ensured to work under the same frequency point, and the reliable transmission and the stable transmission of signaling data are ensured; it can be understood that, the signaling selection rule is not limited in any way, and may be specifically set according to actual situations, for example, the first available frequency hopping point may be selected according to the sequence of dividing available frequency hopping points from front to back, or the last available frequency hopping point may be selected, or the available frequency hopping point at a designated position may be selected; and selecting the available frequency hopping frequency points with the optimal channel bandwidth resources according to the sequence of the channel bandwidth resources of the available frequency hopping frequency points from large to small.
In another possible implementation manner, the map transmission device may sequentially detect the channels of the designated frequency hopping points based on a frequency hopping path until available frequency hopping points are obtained; the frequency hopping path is determined by a pre-generated pseudo random code, specifically, the frequency hopping path is generated by sequencing all specified frequency hopping points in a frequency band corresponding to the available image transmission points based on the pre-generated pseudo random code, and it can be understood that the generation algorithm of the pseudo random code is not limited in any way, and can be specifically selected according to actual situations, for example, RS (Reed-Solomon) algorithm, gold algorithm, M algorithm or M algorithm; the embodiment of the application ensures the stable transmission of signaling transmission by detecting the channel of the frequency hopping point to be hopped.
In an example, please refer to table 2, for example, the designated frequency hopping point is (5777,5779,5781,5783,5787,5789,5791,5793), the frequency hopping path determined based on the pseudo random code is (5781 → 5787 → 5777 → 5791 → 5779 → 5793 → 5783 → 5789), if the current time slot is in the signaling time slot, for example, the current sending end is in the signaling sending time slot and the receiving end is synchronously in the signaling receiving time slot, both communicating parties (sending end and receiving end) start from the unused designated frequency hopping point 5781, detect the channel of the frequency point 5781, if the channel quality meets the preset signaling transmission condition, the frequency point 5781 is taken as the available frequency hopping point, the sending end hops to the frequency point 5781 and sends signaling to the receiving end based on the frequency point 5781, and the receiving end hops to the frequency point 5781 and receives the signaling of the sending end based on the frequency point 5781; if the channel quality of the frequency point 5781 does not accord with the preset signaling transmission condition, screening the frequency point 5781, and continuously detecting the frequency point 5787 until an available frequency hopping frequency point with the first channel quality according with the preset signaling transmission condition is detected according to the frequency hopping path; it should be noted that, both communication parties (the sending end and the receiving end) detect unused and unscreened designated frequency hopping points, for example, in the designated frequency hopping points, in the last signaling time slot communication process, if it is detected that the channel quality of the frequency point 5781 does not meet the preset signaling transmission condition and is screened out, and the frequency point 5787 whose channel quality meets the preset signaling transmission condition is used, in the current signaling time slot, the receiving end and the sending end start detecting from the frequency point 5777 based on the frequency hopping path.
This application embodiment has realized at first confirming the picture frequency point of can passing to further acquire appointed frequency hopping point in the frequency channel that the picture frequency point of can passing corresponds guarantees the preliminary usability of appointed frequency hopping point is followed again further confirms available frequency hopping point in the appointed frequency hopping point, the channel quality at available frequency hopping point accords with and predetermines signaling transmission condition, thereby based on available frequency hopping point carries out signaling transmission, has not only improved interference immunity, guarantees the transmission stability of wireless picture transmission moreover.
Referring to fig. 2B, a second wireless map transmission communication method according to an exemplary embodiment of the present application is shown, and the embodiment describes technical solutions of the present disclosure in more detail with respect to fig. 1. The method specifically comprises the following steps:
step S201, if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency point; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition. Similar to step S101 in fig. 1, the description is omitted here.
Step S202, if the current time slot is in a signaling time slot, determining available frequency hopping points from specified frequency hopping points in a frequency band corresponding to the available frequency hopping points, and transmitting signaling based on the available frequency hopping points; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions. Similar to step S102 in fig. 1, the description is omitted here.
Step S203, periodically detecting channels of other image transmission frequency points except the available image transmission frequency point, and recording the image transmission frequency point with the channel quality meeting the preset image transmission condition as a standby image transmission frequency point, so that when the channel quality of the available image transmission frequency point does not meet the preset image transmission condition, a new available image transmission frequency point is determined from the standby image transmission frequency point.
It should be noted that the wireless image transmission communication method of this embodiment may be applied to an image transmission device at a transmitting end, and may also be applied to an image transmission device at a receiving end.
In step S203, the map transmission device periodically detects channels of other map transmission frequency points except the available map transmission frequency point to determine a real-time state of the channels of the other map transmission frequency points, records the map transmission frequency points as standby map transmission frequency points if it is detected that there are map transmission frequency points whose channel quality meets the preset condition of transmitting images, determines a new available map transmission frequency point from the standby map transmission frequency points when the channel quality of the available map transmission frequency point does not meet the preset condition of transmitting images, and determines a new designated frequency hopping frequency point based on a frequency band corresponding to the new available map transmission frequency point to ensure security and stability of wireless map transmission communication; it should be noted that, both communication parties select a new available image transmission frequency point based on a pre-agreed frequency point selection rule, so that image transmission is ensured at the same available image transmission frequency point, and reliability and stability of image transmission are ensured.
In an embodiment, the map transmission device may sequence new designated frequency hopping points based on a pre-generated pseudo random code to obtain a new frequency hopping path, thereby ensuring the communication security and reliability of a signaling channel.
Referring to fig. 3 and fig. 4, a third wireless map transmission communication method according to an exemplary embodiment of the present application is shown, and the embodiment describes the technical solution of the present disclosure in more detail with respect to fig. 1. The wireless image transmission communication method of the embodiment is applied to image transmission equipment at a sending end, and the method specifically comprises the following steps:
step S301, if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency point; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition. Similar to step S101 in fig. 1, the description is omitted here.
Step S302, if the current time slot is in a signaling time slot, determining available frequency hopping points from specified frequency hopping points in a frequency band corresponding to the available frequency hopping points, and transmitting signaling based on the available frequency hopping points; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions. Similar to step S102 in fig. 1, the description is omitted here.
Step S303, if the current time slot is in a signaling time slot and no response message of a receiving end is received within a preset time, acquiring an optimal available frequency hopping point from the designated frequency hopping points, and transmitting a signaling based on the optimal available frequency hopping point to receive the response message of the receiving end; and the channel quality of the optimal available frequency hopping point is optimal.
In this embodiment, a TDMA cycle of a transmitting end includes a map transmission time slot, a signaling reception time slot, and a signaling transmission time slot; one TDMA cycle of the receiving end includes a map transmission receiving time slot, a signaling receiving time slot, and a signaling transmitting time slot.
In step S303, if the current time slot is the signaling time slot and no response message from the receiving end is received within the preset time, indicating that the communication processes of the two parties of the current communication are affected by wireless interference, the sending end detects all designated frequency hopping points, acquires the designated frequency hopping point with the optimal channel quality as an optimal available frequency hopping point, switches the sending end to the optimal available frequency hopping point, and performs signaling communication with the receiving end based on the optimal available frequency hopping point to receive the response message from the receiving end.
Specifically, when the receiving end is in a signaling sending time slot, an inquiry message is sent to the receiving end based on the optimal available frequency hopping point, and when the receiving end is in a signaling receiving time slot, a response message of the receiving end is waited to be received based on the optimal available frequency hopping point, and after the receiving end switches the map transmission time slot or the signaling sending time slot into the signaling receiving time slot, the available frequency hopping point is determined to perform frequency point switching until the optimal available frequency hopping point is switched and the inquiry message is received, and a response message is sent to the sending end based on the inquiry message, so that the sending end can receive the response message of the receiving end when the receiving end is in the signaling receiving time slot, and both sides recover normal communication, thereby ensuring the reliability of signaling communication.
Referring to fig. 4 and fig. 5, a fourth wireless map transmission communication method according to an exemplary embodiment of the present application is shown, and the embodiment describes the technical solution of the present disclosure in more detail with respect to fig. 1. The wireless image transmission communication method of the embodiment is applied to image transmission equipment at a receiving end, and the method specifically comprises the following steps:
step S401, if the current time slot is in image transmission, image transmission is carried out based on available image transmission frequency points; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition. Similar to step S101 in fig. 1, the description is omitted here.
Step S402, if the current time slot is in the signaling time slot, determining available frequency hopping points from the designated frequency hopping points in the frequency band corresponding to the available frequency hopping points, and transmitting the signaling based on the available frequency hopping points; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions. Similar to step S102 in fig. 1, the description is omitted here.
Step S403, if the response message of the sender is not received within the preset time, executing the following steps before sending the response message to the sender: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
In this embodiment, one TDMA cycle of the receiving end includes a map transmission receiving time slot, a signaling receiving time slot, and a signaling transmitting time slot.
In step S403, if no response message from the sending end is received within a preset time, indicating that the communication processes of the two current communication parties are affected by wireless interference, the sending end performs signaling communication with the receiving end based on the optimal available hopping frequency point to receive the response message from the receiving end, and accordingly, the sending end switches the transmission receiving time slot to a signaling receiving time slot, or after switching the signaling sending time slot to a signaling receiving time slot, determines an available hopping frequency point from specified hopping frequency points in a frequency band corresponding to the available hopping frequency point, and waits to receive a message from the sending end based on the available hopping frequency point, the sending end performs frequency point hopping based on the determined available hopping frequency point, and the receiving end receives an inquiry message from the sending end until the frequency point of the receiving end is switched to the optimal available hopping frequency point that is the same as the sending end, and then the sending end generates a response message based on the inquiry message of the sending end, synchronously switches to a signaling sending time slot when the sending end switches to the signaling receiving time slot based on the timestamp included in the message of the sending end, and then sends the response message to the sending end based on the optimal available frequency hopping point, so that the two parties recover the normal communication process and ensure the reliability of signaling communication.
Corresponding to the embodiment of the wireless image transmission communication method, the application also provides embodiments of a wireless image transmission communication device, an image transmission device, a wireless image transmission communication system and a computer readable storage medium.
As shown in fig. 6, the present application further provides a wireless map transmission communication device, adapted to support TDMA, where a period of the TDMA is divided into a map transmission timeslot and a signaling timeslot, and the device includes:
the image transmission module 21 is configured to perform image transmission based on available image transmission frequency points if the current time slot is in the image transmission time slot; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition.
A signaling transmission module 22, configured to determine an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available frequency hopping point if the current time slot is in the signaling time slot, and perform signaling transmission based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
Optionally, the signaling transmission module includes:
the available frequency hopping point determining unit is used for sequentially detecting the channels of the specified frequency hopping points based on a frequency hopping path if the current time slot is in the signaling time slot until the available frequency hopping points are obtained; the frequency hopping path is generated by sequencing all appointed frequency hopping points in the frequency band corresponding to the available image transmission frequency points based on a pre-generated pseudo-random code.
And the signaling transmission unit is used for transmitting the signaling based on the available frequency hopping points.
Optionally, the method further comprises:
and the frequency point detection module is used for periodically detecting channels of other image transmission frequency points except the available image transmission frequency point, and recording the image transmission frequency point with the channel quality meeting the preset image transmission condition as a standby image transmission frequency point, so that when the channel quality of the available image transmission frequency point does not meet the preset image transmission condition, a new available image transmission frequency point is determined from the standby image transmission frequency point.
Optionally, the apparatus is applied to an image transmission device at a transmitting end.
The signaling transmission module 22 is further configured to, if the current time slot is a signaling time slot and no response message of a receiving end is received within a preset time, obtain an optimal available frequency hopping point from the designated frequency hopping points, and perform signaling transmission based on the optimal available frequency hopping point to receive the response message of the receiving end; and the channel quality of the optimal available frequency hopping point is optimal.
Optionally, the signaling time slot is divided into a signaling receiving time slot and a signaling transmitting time slot.
The device is applied to image transmission equipment at a receiving end;
the signaling transmission module 22 is further configured to, if the response message of the sender is not received within the preset time, execute the following steps before sending the response message to the sender: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Correspondingly, as shown in fig. 7, the present application further provides a mapping apparatus 30, which includes a processor 31; a memory 32 for storing executable instructions, the memory 32 comprising a computer program 33; wherein the processor 31 is configured to:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
The Processor 31 executes the computer program 33 included in the memory 32, and the Processor 31 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 32 stores a computer program of the wireless image transfer communication method, and the memory 32 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. Also, the apparatus may cooperate with a network storage device that performs a storage function of the memory through a network connection. The storage 32 may be an internal storage unit of the device 30, such as a hard disk or a memory of the device 30. The memory 32 may also be an external storage device of the device 30, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc., provided on the device 30. Further, memory 32 may also include both internal and external storage units of device 30. The memory 32 is used for storing the computer program 33 and other programs and data required by the device. The memory 32 may also be used to temporarily store data that has been output or is to be output.
The various embodiments described herein may be implemented using a computer-readable medium such as computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in memory and executed by the controller.
The electronic device 30 includes, but is not limited to, the following forms of presence: (1) a mobile communication device: such devices are characterized by mobile communications capabilities and are primarily targeted at providing voice, data communications. Such terminals include: smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, etc.; (2) ultra mobile personal computer device: the equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such terminals include: PDA, MID, and UMPC devices, etc., such as iPad; (3) a portable entertainment device: such devices can display and play multimedia content. This type of device comprises: audio, video players (e.g., ipods), handheld game consoles, electronic books, and smart toys and portable car navigation devices; (4) a server: the device for providing the computing service, the server comprises a processor, a hard disk, a memory, a system bus and the like, the server is similar to a general computer architecture, but the server needs high requirements on processing capacity, stability, reliability, safety, expandability, manageability and the like because the server needs to provide high-reliability service; (5) and other electronic equipment with data interaction function. The device may include, but is not limited to, a processor 31, a memory 32. Those skilled in the art will appreciate that fig. 7 is merely an example of the electronic device 30, and does not constitute a limitation of the electronic device 30, and may include more or less components than those shown, or combine certain components, or different components, e.g., the device may also include input-output devices, network access devices, buses, etc.
Optionally, the image transmission device is an image transmission device at a sending end.
The processor is further configured to:
if the current time slot is in the signaling time slot and no response message of a receiving end is received within the preset time, acquiring an optimal available frequency hopping point from the appointed frequency hopping points, and transmitting signaling based on the optimal available frequency hopping point to receive the response message of the receiving end; and the channel quality of the optimal available frequency hopping point is optimal.
Optionally, the image transmission device is an image transmission device at a receiving end.
The processor is further configured to:
if the response message of the sending end is not received within the preset time, executing the following steps before sending the response message to the sending end: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as a memory comprising instructions, executable by a processor of an apparatus to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Referring to fig. 8, the present application further provides a wireless image transmission communication system, which includes a transmitting end 41 and a receiving end 42;
the sending end 41 is configured to transmit an image to the receiving end 42 based on available image transmission frequency points if the current time is in an image transmission time slot; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition.
The receiving end 42 is configured to determine an available image transmission frequency point if the current time slot is in an image transmission time slot, and receive an image transmitted by the transmitting end 41 based on the available image transmission frequency point; and the channel quality of the available image transmission frequency points accords with the preset image transmission condition.
The sending end 41 is further configured to determine an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available frequency hopping point if the current time slot is in the signaling time slot, and perform signaling transmission with the receiving end 42 based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
The receiving end 42 is further configured to determine an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available frequency hopping point if the current time slot is in the signaling time slot, and perform signaling transmission with the sending end 41 based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
Optionally, the sending end 41 is further configured to, if the current time slot is a signaling time slot and a response message of the receiving end 42 is not received within a preset time, obtain an optimal available frequency hopping point from the designated frequency hopping points, and perform signaling transmission based on the optimal available frequency hopping point to receive the response message of the receiving end 42; and the channel quality of the optimal available frequency hopping point is optimal.
Correspondingly, the receiving end 42 is further configured to, if the response message of the sending end 41 is not received within a preset time, execute the following steps before receiving the inquiry message of the sending end 41 and sending the response message to the sending end: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A wireless map-based communication method, adapted for use with map-based devices that support TDMA, wherein a period of the TDMA is divided into map-based time slots and signaling time slots, the method comprising:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
2. The wireless map transmission communication method of claim 1, wherein the determining available frequency hopping points from the designated frequency hopping points in the frequency band corresponding to the available frequency hopping points comprises:
sequentially detecting the channels of the appointed frequency hopping points based on the frequency hopping path until available frequency hopping points are obtained; the frequency hopping path is determined by a pre-generated pseudo random code.
3. The wireless map-based communication method of claim 1, further comprising:
and periodically detecting channels of other image transmission frequency points except the available image transmission frequency point, and recording the image transmission frequency points with the channel quality meeting the preset image transmission condition as standby image transmission frequency points, so that when the channel quality of the available image transmission frequency points does not meet the preset image transmission condition, a new available image transmission frequency point is determined from the standby image transmission frequency points.
4. The wireless map transmission communication method according to claim 1, wherein the method is applied to a transmitting end;
the method further comprises the following steps:
if the current time slot is in the signaling time slot and no response message of a receiving end is received within the preset time, acquiring the optimal available frequency hopping point from the designated frequency hopping points; the channel quality of the optimal available frequency hopping point is optimal;
and carrying out signaling transmission based on the optimal available frequency hopping point so as to receive a response message of the receiving end.
5. The wireless map transmission communication method of claim 1, wherein the signaling time slot is divided into a signaling receiving time slot and a signaling transmitting time slot;
the method is applied to a receiving end;
the method further comprises:
if the response message of the sending end is not received within the preset time, executing the following steps before sending the response message to the sending end:
and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
6. A wireless map-based communication apparatus adapted to support TDMA, wherein a period of the TDMA is divided into map-based time slots and signaling time slots, the apparatus comprising:
the image transmission module is used for transmitting images based on available image transmission frequency points if the current time slot is in the image transmission time slot; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
a signaling transmission module, configured to determine an available frequency hopping point from designated frequency hopping points in a frequency band corresponding to the available frequency hopping point if the current time slot is in a signaling time slot, and perform signaling transmission based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
7. An image transmission device, wherein the image transmission device supports a TDMA, and a period of the TDMA is divided into an image transmission time slot and a signaling time slot, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
8. The image transmission device according to claim 7, wherein the image transmission device is an image transmission device of a transmitting end;
the processor is further configured to:
if the current time slot is in the signaling time slot and no response message of a receiving end is received within the preset time, acquiring the optimal available frequency hopping point from the designated frequency hopping points; the channel quality of the optimal available frequency hopping point is optimal;
and carrying out signaling transmission based on the optimal available frequency hopping point so as to receive a response message of the receiving end.
9. The image transmission device according to claim 7, wherein the image transmission device is a receiving-end image transmission device; the signaling time slot is divided into a signaling receiving time slot and a signaling sending time slot;
the processor is further configured to:
if the response message of the sending end is not received within the preset time, executing the following steps before sending the response message to the sending end:
and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
10. A wireless image transmission communication system is characterized by comprising a sending end and a receiving end;
the sending end and the receiving end both execute the following steps:
if the current time slot is in the image transmission time slot, image transmission is carried out based on the available image transmission frequency points; the channel quality of the available image transmission frequency points accords with the preset image transmission condition;
if the current time slot is in the signaling time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available frequency hopping point, and transmitting signaling based on the available frequency hopping point; and the channel quality of the available frequency hopping points accords with the preset signaling transmission conditions.
11. The wireless messaging communication system of claim 10, wherein the signaling slots are divided into signaling receive slots and signaling transmit slots;
the sending end is further configured to, if the current signaling time slot is in and no response message of the receiving end is received within a preset time, obtain an optimal available frequency hopping point from the designated frequency hopping points, and transmit a signaling based on the optimal available frequency hopping point to receive the response message of the receiving end; the channel quality of the optimal available frequency hopping point is optimal;
the receiving end is further configured to, if the response message of the sending end is not received within a preset time, execute the following steps before sending the response message to the sending end: and after the map transmission time slot or the signaling sending time slot is switched to a signaling receiving time slot, determining an available frequency hopping point from specified frequency hopping points in a frequency band corresponding to the available map transmission frequency band, and transmitting the signaling based on the available frequency hopping point.
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