CN114598670A - Instant communication system based on satellite communication - Google Patents
Instant communication system based on satellite communication Download PDFInfo
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- CN114598670A CN114598670A CN202210069797.5A CN202210069797A CN114598670A CN 114598670 A CN114598670 A CN 114598670A CN 202210069797 A CN202210069797 A CN 202210069797A CN 114598670 A CN114598670 A CN 114598670A
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- Prior art keywords
- satellite communication
- message
- terminal
- audio
- server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
- H04L51/043—Real-time or near real-time messaging, e.g. instant messaging [IM] using or handling presence information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/06—Message adaptation to terminal or network requirements
- H04L51/066—Format adaptation, e.g. format conversion or compression
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/07—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
- H04L51/10—Multimedia information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
Abstract
The invention discloses an instant messaging system based on satellite communication, which comprises an information transmitting terminal, a receiving terminal and a processing terminal, wherein the information transmitting terminal is used for a user to send an instant message; the satellite communication terminal equipment is used for connecting each terminal with a satellite to form a satellite network and receiving the instant message sent by the information transmitting terminal; the message server is used for processing and forwarding text, pictures and file messages of the satellite communication terminal equipment; the audio and video server processes and forwards audio data or video data of the satellite communication terminal equipment in audio or video communication; and the information receiving terminal is used for receiving the instant message which is processed and forwarded by the message server or the audio and video server by the user. The invention has the advantages that: under the satellite communication with narrow bandwidth, the instant messaging can be carried out smoothly. The instant communication system of the invention uses a smaller bandwidth, so the satellite communication cost is lower. All communication data are transferred through the server, so that the server can store the communication data conveniently.
Description
Technical Field
The present invention relates to communication systems, and particularly to an instant messaging system based on satellite communication.
Background
The instant communication system has the functions of instant communication, text message, audio and video communication, data sharing, file sending and the like, and supports the functions of file real-time transmission, offline file sending and file group sending; the rapid circulation of the official documents is realized to the maximum extent.
The existing instant messaging system (WeChat, etc.) is applied to the internet, but video communication is easy to be blocked under the existing bandwidth of a satellite, because the existing instant messaging software occupies a larger bandwidth and is not suitable for satellite communication with a narrow bandwidth.
Disclosure of Invention
The invention provides a bionic robot fish which can autonomously avoid obstacles and can autonomously swim in water like imitating real fish by technical means aiming at the defects of the existing instant communication system based on satellite communication.
The instant communication system based on satellite communication comprises an information transmitting terminal, a receiving terminal and a processing terminal, wherein the information transmitting terminal is used for a user to send an instant message;
the satellite communication terminal equipment is used for connecting each terminal with a satellite to form a satellite network and receiving the instant message sent by the information transmitting terminal;
the message server is used for processing and forwarding text, pictures and file messages of the satellite communication terminal equipment;
the audio and video server processes and forwards audio data or video data of the satellite communication terminal equipment in audio or video communication; and the information receiving terminal is used for receiving the instant message which is processed and forwarded by the message server or the audio and video server by the user.
Further preferably, the information transmitting terminal comprises a mobile terminal, a pad terminal and a PC terminal, and the information receiving terminal comprises a mobile phone terminal, a pad terminal and a PC terminal.
Further optimizing, the processing process that the information transmitting terminal sends the instant message to the satellite communication terminal equipment or the satellite communication terminal equipment sends the instant message to the message server and the audio and video server is as follows:
A. write out data through iosission.
B. Then the next end performs writing service processing;
C. after the processing is finished, the processed data is delivered to IoFilterChain for message filtering and protocol conversion;
D. and finally, writing out the data to the socket channel through the I/O Processor.
Further optimizing, the processing process of the satellite communication terminal equipment for receiving the instant message of the information transmitting terminal or the instant message server and the audio and video server for receiving the instant message sent by the satellite communication terminal equipment is as follows:
a. establishing connection with the upper end through a socket adaptor;
b. after the connection is established, the reading and writing of the I/O are handed to an I/O Processor thread, and the I/O Processor is multi-threaded;
c. the data read by the I/O Processor is subjected to message filtering and format conversion through all configured IoFilter in IoFilter Chain and the IoFilter;
d. and finally, the IoFilter delivers the data to the next end for service processing, and the whole reading process is completed.
Further optimization, the message server adopts secondary compression when processing pictures, the first compression adopts lossless compression, and the second compression adopts lossy compression.
Further optimizing, the audio and video server adopts CAF format to record when processing voice data, and adopts MP3 format audio file compression.
Further optimizing, the audio and video server adopts H.264/H.265 mode to compress video data when processing video data.
Further optimization, when the message server processes the file message, the file message is divided into 1K file fragments for transmission.
The invention has the advantages that: 1. under the satellite communication with narrow bandwidth, the instant messaging can be carried out smoothly.
2. The instant communication system of the invention uses a smaller bandwidth, so the satellite communication cost is lower.
3. All communication data are transferred through the server, so that the server can store the communication data conveniently;
4. the system comprises a plurality of client terminals (PC terminals and mobile phone terminals), and is convenient for clients to contact anytime and anywhere;
5. multi-server specialization (message server, audio and video server, database server) to optimize server load;
6. ensuring a message synchronization mechanism, a message reliability guarantee, message time sequence and consistency, a message pushing mechanism and a heartbeat keep-alive mechanism through a Mina framework;
7. in order to save the flow, the communication data is compressed and then transmitted.
Drawings
Fig. 1 is a schematic structural diagram of an instant messaging system based on satellite communication.
Fig. 2 is a control system diagram of an instant messaging system based on satellite communication.
Detailed Description
The instant messaging system based on satellite communication is further explained with reference to the attached drawings.
The instant communication system based on satellite communication comprises an information transmitting terminal, a receiving terminal and a processing terminal, wherein the information transmitting terminal is used for a user to send an instant message; the satellite communication terminal equipment is used for connecting each terminal with a satellite to form a satellite network and receiving the instant message sent by the information transmitting terminal; the message server is used for processing and forwarding text, pictures and file messages of the satellite communication terminal equipment; the audio and video server processes and forwards audio data or video data of the satellite communication terminal equipment in audio or video communication, and audio and video services are independent based on load balance due to high concurrency of audio and video data transmission; and the information receiving terminal is used for receiving the instant message which is processed and forwarded by the message server or the audio and video server by the user.
The information transmitting terminal comprises a mobile phone terminal, a pad terminal and a PC terminal, and the information receiving terminal comprises a mobile phone terminal, a pad terminal and a PC terminal.
The processing process of the information transmitting terminal sending the instant message to the satellite communication terminal equipment or the satellite communication terminal equipment sending the instant message to the message server and the audio and video server is as follows:
E. write out data through iosission.
F. Then the next end performs writing service processing;
G. after the processing is finished, delivering the processed data to IoFilterChain for message filtering and protocol conversion;
H. and finally, writing out the data to the socket channel through the I/O Processor.
The instant message processing process of the satellite communication terminal equipment receiving information transmitting terminal or the instant message server and the audio and video server receiving the instant message sent by the satellite communication terminal equipment is as follows:
a. establishing connection with the upper end through a socket adaptor;
b. after the connection is established, the reading and writing of the I/O are handed to an I/O Processor thread, and the I/O Processor is multi-threaded;
c. the data read by the I/O Processor is subjected to message filtering and format conversion through all configured IoFilter in IoFilter Chain and the IoFilter;
d. and finally, the IoFilter delivers the data to the next end for service processing, and the whole reading process is completed.
And the message server processes the pictures by adopting secondary compression, wherein the first compression adopts lossless compression, and the second compression adopts lossy compression.
When the audio and video server processes the voice data, the audio and video server adopts CAF format for recording and adopts MP3 format for audio file compression. And the audio and video server compresses the video data in an H.264/H.265 mode when processing the video data. When the message server processes the file message, the file message is divided into 1K file fragments for transmission.
As shown in fig. 1 and fig. 2, the mobile phone terminal, the pad terminal, and the PC terminal transmit messages, the messages are converted by the satellite, the satellite communication terminal device, and the server, and finally the mobile phone terminal, the pad terminal, and the PC terminal receive the messages.
And when the message needing to be converted is a picture, the picture message is subjected to secondary compression processing. The sender uses 50% lossless compression, the compression ratio is 0.56, a 4M picture arrives at the server at about 2M, and downloads the second compression from the server at the receiver using lossy compression, the compression ratio is 0.3, then the received picture is about 200K, and most of the image details can be retained. After providing the "view artwork" function (at a later stage), the compression rate is 0.56, and the client can receive 2M lossless "artwork" from the server.
When the message to be converted is a voice message, the voice message is recorded in apple CAF format, and about 110KB (bytes) is recorded for 10 seconds without compression. The voice message can be further compressed to 1/10 by audio file compression in MP3 format.
When the message to be converted is a voice call, the voice call adopts 8K, single channel and double byte sampling, and the pure audio data is 8K × 2 × 8 ═ 128Kbit/s without compression. Based on comprehensive consideration of bandwidth and voice call quality, 16 times of lossy compression of a G.729A protocol is adopted, the bandwidth is 8kbps, the voice quality is clear and distinguishable, and only a small amount of distortion exists.
When the message needing to be converted is a video call, the video call compresses video data in an H.264/H.265 mode according to a compression ratio of 100: 1,
when the message needing to be converted is a file, in order to adapt to the narrow bandwidth during file uploading, the file is divided into file fragments with the size of 1K for transmission, so that the purpose of adapting to the narrow bandwidth is achieved.
The system is characterized in that:
1. all communication data are transferred through the server, so that the server can store the communication data conveniently;
2. the system comprises a plurality of client sides (PC sides and mobile phone sides), and is convenient for clients to contact anytime and anywhere;
3. multi-server specialization (message server, audio and video server, database server) to optimize server load;
4. ensuring a message synchronization mechanism, a message reliability guarantee, message time sequence and consistency, a message pushing mechanism and a heartbeat keep-alive mechanism through a Mina framework;
5. in order to save the flow, the communication data is compressed and then transmitted. For example: picture compression techniques, voice data compression mechanisms (g729a), video compression mechanisms (H264 and ffmpeg).
Claims (8)
1. Instant messaging system based on satellite communication, characterized in that:
the information transmitting terminal is used for the user to send the instant message;
the satellite communication terminal equipment is used for connecting each terminal with a satellite to form a satellite network and receiving the instant message sent by the information transmitting terminal;
the message server is used for processing and forwarding text, pictures and file messages of the satellite communication terminal equipment;
the audio and video server processes and forwards audio data or video data of the satellite communication terminal equipment in audio or video communication;
and the information receiving terminal is used for receiving the instant message which is processed and forwarded by the message server or the audio and video server by the user.
2. The instant messaging system based on satellite communication of claim 1, wherein: the information transmitting terminal comprises a mobile phone terminal, a pad terminal and a PC terminal, and the information receiving terminal comprises a mobile phone terminal, a pad terminal and a PC terminal.
3. The instant messaging system based on satellite communication of claim 1, wherein: the processing process of the information transmitting terminal sending the instant message to the satellite communication terminal equipment or the satellite communication terminal equipment sending the instant message to the message server and the audio and video server is as follows:
A. write out data through iosission.
B. Then the next end performs writing service processing;
C. after the processing is finished, the processed data is delivered to IoFilterChain for message filtering and protocol conversion;
D. and finally, writing out the data to the socket channel through the I/O Processor.
4. The instant messaging system based on satellite communication of claim 1, wherein: the processing process of the satellite communication terminal equipment receiving the instant message of the information transmitting terminal or the instant message server and the audio and video server receiving the instant message sent by the satellite communication terminal equipment is as follows:
a. establishing connection with the upper end through a socket adaptor;
b. after the connection is established, the reading and writing of the I/O are handed to an I/O Processor thread, and the I/O Processor is multi-threaded;
c. the data read by the I/O Processor is subjected to message filtering and format conversion through all configured IoFilter in IoFilter Chain and the IoFilter;
d. and finally, the IoFilter delivers the data to the next end for service processing, and the whole reading process is completed.
5. The instant messaging system based on satellite communication of claim 1, wherein: the message server processes the pictures by adopting secondary compression, wherein the first compression adopts lossless compression, and the second compression adopts lossy compression.
6. The instant messaging system based on satellite communication of claim 1, wherein: when the audio and video server processes the voice data, the audio and video server adopts CAF format for recording and adopts MP3 format for compressing the audio file.
7. The instant messaging system based on satellite communication of claim 1, wherein: and the audio and video server compresses the video data in an H.264/H.265 mode when processing the video data.
8. The instant messaging system based on satellite communication of claim 1, wherein: when the message server processes the file message, the file message is divided into 1K file fragments for transmission.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210069797.5A CN114598670A (en) | 2022-01-21 | 2022-01-21 | Instant communication system based on satellite communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210069797.5A CN114598670A (en) | 2022-01-21 | 2022-01-21 | Instant communication system based on satellite communication |
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| CN114598670A true CN114598670A (en) | 2022-06-07 |
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| CN202210069797.5A Pending CN114598670A (en) | 2022-01-21 | 2022-01-21 | Instant communication system based on satellite communication |
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2022
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| WO2017096637A1 (en) * | 2015-12-11 | 2017-06-15 | 泛太通信导航有限公司 | Mimo satellite service terminal |
| CN109327593A (en) * | 2018-10-19 | 2019-02-12 | 小唐科技（上海）有限公司 | Satellite communication terminal audio test system and method |
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