CN109640392B - Internet of things data acquisition system and method based on satellite mobile communication system - Google Patents

Internet of things data acquisition system and method based on satellite mobile communication system Download PDF

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CN109640392B
CN109640392B CN201811449843.4A CN201811449843A CN109640392B CN 109640392 B CN109640392 B CN 109640392B CN 201811449843 A CN201811449843 A CN 201811449843A CN 109640392 B CN109640392 B CN 109640392B
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internet
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CN109640392A (en
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张开禾
吕子平
韩淼
王力权
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CETC 54 Research Institute
China Telecom Satellite Communications Co Ltd
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CETC 54 Research Institute
China Telecom Satellite Communications Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses an Internet of things data acquisition system and method based on a satellite mobile communication system, wherein the acquisition system comprises more than 1 terminal, an access network element, more than 1 data server and more than 1 application server; each terminal is connected with the access network element through a satellite data link; the access network element is connected with each application server through each data server through the internet. The method comprises the steps of establishing a special broadcast channel, establishing a data channel, uploading data and confirming the data. The invention realizes the fusion of the ground network and the satellite network, and can acquire the data of the internet of things terminal in real time no matter in the coverage area or the non-coverage area of the ground network; the compatibility of the equipment is considered, so that the equipment has better maintainability. When the network is idle, the D-RACH redundant channel is additionally configured, so that enough air interface resources are ensured, and data can be transmitted to the application service without being accumulated on the terminal.

Description

Internet of things data acquisition system and method based on satellite mobile communication system
Technical Field
The invention relates to a data acquisition system and method of the Internet of things, in particular to a data acquisition system and method of the Internet of things based on a satellite mobile communication system, and belongs to the technical field of data communication.
Background
In recent years, the related technology of the internet of things has penetrated into various fields of social economy and livelihood, and the application of the related technology in human society is also diversified. The latest edition of the mobile market report of ericsson shows that by 2021, the total number of terminals of the internet of things is estimated to reach 280 hundred million, including nearly 160 hundred million terminals of the internet of things. The Internet of things is wide in application and extends to multiple fields of intelligent transportation, environment protection, government work, public safety, safe home, intelligent fire fighting, industrial monitoring, environment monitoring, old people nursing, personal health, flower cultivation, water system monitoring, food traceability, enemy investigation, information collection and the like.
The internet of things terminal acquisition equipment in the application of the internet of things is numerous and different in position, and sometimes the mobile internet of things terminal is located in a non-ground network coverage area, so that the requirement of a user for knowing the information of the internet of things cannot be met, and a new requirement is provided for data transmission.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a satellite mobile communication system-based Internet of things data acquisition system and method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the first technical scheme is as follows:
an internet of things data acquisition system based on a satellite mobile communication system comprises more than 1 internet of things terminal, an access network element, more than 1 data server and more than 1 application server; each Internet of things terminal is connected with an access network element through a satellite data link; the access network element is respectively connected with each data server, and each data server is connected with each application server through the Internet; the protocol stack of the data server consists of an application layer (App), a transmission layer (TIP), a network layer (IP) and a Physical layer (Physical); the protocol stack at the side of a data server of the network element of the access network consists of a transmission layer TIP, a network layer IP and a Physical layer Physical, and the protocol stack at the side of a terminal of the internet of things consists of a Radio Resource Control (RRC) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer and a satellite Physical layer TT Physical; the protocol stack of the terminal of the Internet of things consists of a Radio Resource Control (RRC) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer and a satellite Physical layer (TT Physical); a protocol stack at the side of a data server of an access network element is connected with a protocol stack at the side of the data server through an Iu-T protocol interface, and a protocol stack at the side of an internet of things terminal is connected with a protocol stack at the terminal of the internet of things through a Uu air interface;
the data server transmits the information of 'D-BCCH establishment request', 'D-BCCH update request' and 'D-BCCH release indication' from each application server to the access network element; transmitting the information of 'D-BCCH establishment request response', 'D-BCCH update request response' and 'D-BCCH release indication response' from the access network element to a corresponding application server; after the data is checked, forwarding a 'data reporting indication' message from an access network element to a corresponding application server; sending a data confirmation message to an access network element; the 'D-BCCH establishment request' information comprises a spot beam ID and the number of the special random access channels D-RACH; the number of the dedicated random access channels D-RACH is 1 or 2;
the access network element configures a special broadcast control channel D-BCCH/a special access allowing channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of 'receiving dedicated system information' on a common broadcast channel of a satellite mobile communication system, 'dedicated system information' on a dedicated broadcast control channel D-BCCH, 'acknowledgement response information' on a dedicated access grant channel D-AGCH, and 'data transmission request information' on a dedicated random access channel D-RACH; the special system information receiving is formed by loading the information of a special broadcast control channel D-BCCH in a reserved field of special system information;
after receiving the message of receiving the special system information, each Internet of things terminal receives the special system information on a special broadcast control channel D-BCCH, receives the confirmation response information on a special access permission channel D-AGCH, and sends the data transmission request information on a special random access channel D-RACH, wherein the data transmission request information comprises an international Internet of things terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data.
The Internet of things data acquisition system based on the satellite mobile communication system further comprises a charging server; the data server is connected with a charging server; and the charging server charges according to the number of the data reporting messages or charges according to the use time.
The special broadcast control channel D-BCCH and the special access allowing channel D-AGCH are multiplexed on the same downlink transmission channel D-PC10D, the special broadcast control channel D-BCCH and the special access allowing channel D-AGCH take 64 frames as a cycle period, and each 8 frames form a group.
The second technical scheme is as follows:
the data acquisition method for the data acquisition system of the internet of things in the first technical scheme comprises the following specific steps:
step 1: establishing a special broadcast channel: when the data server receives a 'D-BCCH establishment request' message sent by an application server, the message is forwarded to an access network element; the access network element configures a special broadcast control channel D-BCCH/a special access allowing channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of 'receiving special system information' on a public broadcast channel of a satellite mobile communication system, and indicating each Internet of things terminal to receive the special system information of a broadcast control channel D-BCCH in a corresponding time slot;
step 2: establishing a data channel: the access network element broadcasts special system information in a special broadcast control channel D-BCCH and indicates the time slot of a special access permission channel D-AGCH and a special random access channel D-RACH;
and step 3: uploading data: the terminal of the Internet of things sends data transmission request information to an access network element in a special random access channel D-RACH; the access network element sends a 'data reporting indication' message to the data server; the data reporting indication message comprises an international Internet of things terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data in the data transmission request message;
and 4, step 4: data confirmation: after the data server checks the data, the data server forwards a data reporting indication message from an access network element to a corresponding application server; and sending a data confirmation message to the access network element.
In step 4, the data server sends a data confirmation message to the Internet of things terminal through two discontinuous frames, and if the Internet of things terminal receives the data confirmation message, the data transmission is finished; if the data confirmation information is not received in 64 frames, the terminal of the Internet of things retransmits the collected data.
And 3, for the data with the byte more than 40, the terminal of the Internet of things transmits the data on the special random access channel D-RACH twice.
The data acquisition method of the data acquisition system of the Internet of things further comprises the steps of updating resource configuration and releasing resources;
in the step of resource configuration updating, the data server forwards 'D-BCCH updating request' information from each application server to an access network element; the access network element reallocates a special broadcast control channel D-BCCH and/or a special access grant channel D-AGCH and a special random access channel D-RACH according to the spot beam ID and the D-RACH number in the D-BCCH updating request information and sends D-BCCH updating response information to the data server;
in the step of resource allocation release, the data server forwards 'D-BCCH release indication' information from each application server to an access network element; and the access network element releases the special broadcast control channel D-BCCH and/or the special access grant channel D-AGCH and the special random access channel D-RACH according to the spot beam ID in the D-BCCH release indication information and then sends D-BCCH release indication response information to the data server.
The data acquisition method of the data acquisition system of the Internet of things further comprises a reset step, and after the access network element and the data server are restarted to establish physical layer connection, the access network element and the data server mutually send reset indication information.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention realizes the fusion of the ground network and the satellite network, and can acquire the terminal data of the Internet of things in real time no matter in the coverage area of the ground network or the non-coverage area;
2. the invention reserves the complete two-layer protocol stack, considers the compatibility of the equipment and ensures that the equipment has better maintainability.
3. When the network is idle, the D-RACH redundant channel of the special random access channel is additionally configured, so that enough air interface resources are ensured, and data can be transmitted to the application service without being accumulated on the terminal of the Internet of things.
4. In the data acquisition process, the application layer determines whether to configure a special broadcast control channel D-BCCH/a special access grant channel D-AGCH and a special random access channel D-RACH common channel, so that the access network is controlled by the application layer, the wireless resources are saved, and the standby time of the equipment is prolonged.
Drawings
FIG. 1 is a system configuration diagram of embodiment 1 of the present invention;
fig. 2 is a diagram of a protocol stack structure of embodiment 1 of the present invention;
FIG. 3 is a flowchart of embodiment 2 of the present invention;
fig. 4 is an information flow diagram of step 1 in embodiment 2 of the present invention;
fig. 5 is an information flow diagram of embodiment 2 of the present invention, in which the amount of transmitted data is less than or equal to 40 bytes;
fig. 6 is an information flow diagram of embodiment 2 of the present invention, in which the transmitted data size is greater than 40 bytes;
FIG. 7 is an information flow diagram of the step of updating resource allocation according to embodiment 2 of the present invention;
fig. 8 is an information flow diagram of a resource release step in embodiment 2 of the present invention;
fig. 9 is an information flow diagram of reset in embodiment 2 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
example 1:
an internet of things data acquisition system based on a satellite mobile communication system comprises more than 1 internet of things terminal, an access network element, more than 1 data server and more than 1 application server; each Internet of things terminal is connected with an access network element through a satellite data link; the access network element is respectively connected with each data server, and each data server is connected with each application server through the Internet; the protocol stack of the data server consists of an application layer (App), a transmission layer (TIP), a network layer (IP) and a Physical layer (Physical); the protocol stack at the side of a data server of the network element of the access network consists of a transmission layer TIP, a network layer IP and a Physical layer Physical, and the protocol stack at the side of a terminal of the internet of things consists of a Radio Resource Control (RRC) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer and a satellite Physical layer TT Physical; the protocol stack of the terminal of the Internet of things consists of a Radio Resource Control (RRC) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer and a satellite Physical layer (TT Physical); a protocol stack at the side of a data server of an access network element is connected with a protocol stack at the side of the data server through an Iu-T protocol interface, and a protocol stack at the side of an internet of things terminal is connected with a protocol stack at the terminal of the internet of things through a Uu air interface;
the data server transmits the information of 'D-BCCH establishment request', 'D-BCCH update request' and 'D-BCCH release indication' from each application server to the access network element; forwarding 'D-BCCH establishment request response', 'D-BCCH update request response' and 'D-BCCH release indication response' information from an access network element to a corresponding application server; after the data is checked, forwarding a 'data reporting indication' message from an access network element to a corresponding application server; sending a data confirmation message to an access network element; the 'D-BCCH establishment request' information comprises a spot beam ID and the number of the special random access channels D-RACH; the number of the dedicated random access channels D-RACH is 1 or 2;
the access network element configures a special broadcast control channel D-BCCH/a special access allowing channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of ' receiving dedicated system information ' on a common broadcast channel of a satellite mobile communication system, ' dedicated system information ' on a dedicated broadcast control channel D-BCCH, ' acknowledgement response information ' on a dedicated access grant channel D-AGCH, ' and ' data transmission request information ' on a dedicated random access channel D-RACH; the special system information receiving is formed by loading the information of a special broadcast control channel D-BCCH in a reserved field of special system information;
after receiving the message of receiving the special system information, each Internet of things terminal receives the special system information on a special broadcast control channel D-BCCH, receives the confirmation response information on a special access permission channel D-AGCH, and sends the data transmission request information on a special random access channel D-RACH, wherein the data transmission request information comprises an international Internet of things terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data.
The Internet of things data acquisition system based on the satellite mobile communication system further comprises a charging server; the data server is connected with a charging server; and the charging server charges according to the number of the data reporting messages or charges according to the use time.
The special broadcast control channel D-BCCH and the special access allowing channel D-AGCH are multiplexed on the same downlink transmission channel D-PC10D, the special broadcast control channel D-BCCH and the special access allowing channel D-AGCH take 64 frames as a cycle period, and each 8 frames form a group.
Example 2:
the data acquisition method for the data acquisition system of the internet of things in the embodiment 1 comprises the following specific steps:
step 1: establishing a special broadcast channel: when the data server receives a 'D-BCCH establishment request' message sent by the application server, the message is forwarded to an access network element; the access network element configures a special broadcast control channel D-BCCH/a special access allowing channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of 'receiving special system information' on a public broadcast channel of a satellite mobile communication system, and indicating each Internet of things terminal to receive the special system information of a broadcast control channel D-BCCH in a corresponding time slot;
step 2: establishing a data channel: the access network element broadcasts special system information in a special broadcast control channel D-BCCH and indicates the time slot of a special access allowing channel D-AGCH and a special random access channel D-RACH channel;
and step 3: uploading data: the terminal of the Internet of things sends data transmission request information to an access network element in a special random access channel D-RACH; the access network element sends a 'data reporting indication' message to the data server; the data reporting indication message comprises an international Internet of things terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data in the data transmission request message;
and 4, step 4: data confirmation: after the data server checks the data, the data server forwards a data reporting indication message from an access network element to a corresponding application server; and sending a data confirmation message to the access network element.
In step 4, the data server sends a data confirmation message to the Internet of things terminal through two discontinuous frames, and if the Internet of things terminal receives the data confirmation message, the data transmission is finished; if the data confirmation information is not received in 64 frames, the terminal of the Internet of things retransmits the collected data.
And 3, for the data with the byte more than 40, the terminal of the Internet of things transmits the data on the special random access channel D-RACH twice.
The data acquisition method of the data acquisition system of the Internet of things further comprises the steps of updating resource configuration and releasing resources;
in the step of resource configuration updating, the data server forwards 'D-BCCH updating request' information from each application server to an access network element; the access network element reallocates a special broadcast control channel D-BCCH and/or a special access grant channel D-AGCH and a special random access channel D-RACH according to the spot beam ID and the D-RACH number in the D-BCCH updating request information and sends D-BCCH updating response information to the data server;
in the step of resource allocation release, the data server forwards 'D-BCCH release indication' information from each application server to an access network element; and the access network element releases the special broadcast control channel D-BCCH and/or the special access grant channel D-AGCH and the special random access channel D-RACH according to the spot beam ID in the D-BCCH release indication information and then sends D-BCCH release indication response information to the data server.
The data acquisition method of the data acquisition system of the Internet of things further comprises a reset step, and after the access network element and the data server are restarted to establish physical layer connection, the access network element and the data server mutually send reset indication information.
The invention adds a special broadcast control channel D-BCCH/special access allowable channel D-AGCH and a special random access channel D-RACH common channel for data acquisition, broadcasts the added channel information in a section 1A of system information in order to reduce the time for reading the system information by the terminal of the Internet of things, and the terminal of the Internet of things transmits acquired data and receives confirmation information in the newly added channel.
The access network selects proper resources in the service channel to be configured as a dedicated broadcast control channel D-BCCH/a dedicated access grant channel D-AGCH and a dedicated random access channel D-RACH.
The special random access channel D-RACH is used for reporting data by the Internet of things terminal, the Internet of things terminal carries an international Internet of things terminal sequence IMSI, a random number S-RTI and an application service number Server-ID when reporting data, and the D-BCCH/D-AGCH is used for broadcasting D-RACH information and sending a confirmation message of the Internet of things terminal.
When data acquisition service is needed, the data service informs an access network to establish a special broadcast control channel D-BCCH/a special access permission channel D-AGCH and a special random access channel D-RACH, the access network selects radio resources, indicates an Internet of things terminal to receive special broadcast information in a section 1A, and broadcasts special system information in the special broadcast control channel D-BCCH.
The terminal of the Internet of things obtains the D-BCCH information of the special random access channel through the 1A section information, and obtains the D-RACH information of the special random access channel and the D-AGCH information of the special access allowing channel through receiving the D-BCCH information of the special random access channel.
The data volume sent is less than 40 bytes, the terminal of the Internet of things sends collected data on a special access allowed channel D-RACH, the access network forwards the collected data to a data service after receiving the collected data, and the data service confirms the received data after verifying the data.
After receiving the confirmation message of the data service, the access network sends the confirmation message to the same Internet of things terminal through two discontinuous frames at intervals of 4 frames or 8 frames. After receiving the confirmation message, the terminal of the Internet of things finishes the data transmission; if the confirmation information is not received in 64 frames, the terminal of the internet of things needs to retransmit the data.
For data larger than 40 bytes, the data can be sent in two times, and the scheme is not recommended for data larger than 80 bytes, and the data service can send an acknowledgement message twice or once, which is determined by an application layer.
For this scheme, in the air interface aspect, data transmission occupies traffic channel resources. The maximum capacity of each spot beam is calculated without considering the limitation of resources.
Ascending:
at least 1 dedicated access grant channel D-RACH is configured at the air interface, that is, 1 internet of things terminal per frame can send data.
The method is calculated according to 16 frames per second, and the terminal of the internet of things supports 16 × 1 ═ 16 frames per second
Considering the collision of the dedicated access grant channel D-RACH, the condition that the dedicated access grant channel D-RACH is retransmitted exists, the utilization rate of the dedicated access grant channel D-RACH is calculated according to 0.5, and the number of supportable terminals of the Internet of things per second is as follows: 16 × 0.5 ═ 8
And (3) supporting every hour: 3600 x 8-28800
Descending:
calculating according to the confirmation message that each downlink message contains one internet of things terminal:
every 32 frames (1.92s) has 1 frame to send confirmation information, and 8 internet of things terminals can be confirmed, namely 1.92s can confirm 8 internet of things terminals, and 4 internet of things terminals are confirmed every second to calculate:
and (3) supporting every hour: 3600 × 4 ═ 14400
And (4) conclusion:
it can be seen that mainly the downlink capacity is limited, and the uplink and downlink capacity is synthesized, the proposal is as follows:
in general, 14400 terminals of the internet of things can be supported per hour by configuring a dedicated broadcast control channel D-BCCH/dedicated access grant channel D-AGCH and a dedicated access grant channel D-RACH.
For a data acquisition type internet of things terminal, the terminal is under an unattended condition for a long time, and the battery is mainly adopted for power supply, so that the reduction of power consumption is one of key points.
The energy consumed by the terminal of the internet of things is related to the data volume or the transmission rate, and the size of the data packet sent in unit time determines the size of the power consumption. In order to save the power consumption of the terminal of the internet of things and prolong the service life of a battery, the invention considers the following measures:
(1) the aim of saving power is achieved by reducing unnecessary signaling;
(2) the terminal of the Internet of things stays in deep sleep for a longer time so as to achieve the purpose of saving electricity and reduce unnecessary starting of a receiving unit;
(3) protocol stack processing flows are reduced, and the processing overhead of the terminal of the Internet of things is reduced;
(4) unnecessary SIB (system information) receiving is reduced, and after the terminal of the Internet of things is synchronized with the system, the required information can be received in the shortest time, so that the online time of the terminal of the Internet of things is reduced;
(5) and unnecessary information exchange processes are reduced, and the processing overhead of the terminal of the internet of things is reduced [ the way for reducing the power consumption of the terminal of the internet of things here ].
Since the frequency points of the dedicated broadcast control channel D-BCCH and the broadcast control channel BCCH are the same, it is required that 20 time slots are available for the broadcast control channel BCCH carrier, which can be configured as two PCs 10D, one carrying the broadcast control channel BCCH and one carrying the dedicated broadcast control channel D-BCCH.
In order to ensure the requirement of periodically reporting data and emergently reporting data of the terminal of the Internet of things, only one special access allowed channel D-RACH and D-BCCH/D-AGCH is configured when the network is busy.
When the network is idle, a special access allowed channel D-RACH is additionally configured, the redundancy of the channel is improved, and sufficient air interface resources are ensured, so that data can be transmitted to application services and cannot be accumulated on the terminal of the Internet of things.
Due to the limited channel resources, in order to guarantee the voice capacity of the system, it is proposed to select dedicated access grant channel D-RACH channel resources in the packet domain carrier.
In practical application, at most two dedicated access grant channels D-RACH can be configured to meet the requirement.
When the terminal of the internet of things is deployed, one or more data acquisition modes can be preset, and the application layer can set the data acquisition mode used by the terminal of the internet of things according to an actual use scene. The Internet of things terminals in the same spot beam report data in time intervals as far as possible, channel conflicts are avoided, the online time of the Internet of things terminals is reduced, and the standby time of the Internet of things terminals is prolonged.
At DEDICATED SYSTEM INFORMATION defines broadcast INFORMATION, which can broadcast general setting INFORMATION of the terminal of the internet of things, and is used for setting the public parameters of the terminal of the internet of things.
In the INFORMATION sent to the terminal of the internet of things by the access network, except the confirmation INFORMATION of the terminal of the internet of things, data needs to be sent to the terminal of the internet of things in some cases, and data does not need to be sent to the terminal of the internet of things in some cases.
The application characteristics of each industry are considered, different application services can be provided for different industries, and the application services are managed by different industries. Thus, consider a separate deployment of data services and application services.
And (4) proposing: the data service is located in the central machine room, and the application service can be flexibly placed.
The data received by the access network is uniformly sent to the data service, and is uniformly managed by the data service as original data. The data service is distributed to each application service according to the use object of the data. The early application is less, the deployment can be merged, and the separate deployment is needed as the application is increased.
If necessary, an interface with the billing system may be added between the services.
According to the scheme, the terminal information of the Internet of things does not exist in a core network, similar HSS equipment does not exist, and the terminal information of the Internet of things is recommended to be maintained in an application layer. The application layer confirms the legitimacy of the Internet of things terminal, and the access network can distinguish different applications through the Internet of things terminal identification IMSI, so that the access network can conveniently forward data.
The control center of the application layer issues an instruction to a single Internet of things terminal through a special access permission channel D-AGCH, and can control the reporting of start-stop data of the Internet of things terminal and charging management.
For the access network common channel scheme, the charging mode is suggested:
(1) unified charging: data is transmitted between the data service and the application service through the operator's billing system, and the data is billed "on a" stripe "basis.
(2) Charging by industry: the business negotiates with the operator, and the monthly payment is adopted, so that the data does not pass through a charging system of the operator.
The access network is connected with the application layer through TCP/IP, the access network is only connected with one data service device (supporting the main and standby), and the data service device can be connected with a plurality of application service devices. The access network is a client, and the data service equipment is a server.
For the data acquisition process, the access network is controlled by an application layer, and the application layer determines whether to configure a dedicated broadcast control channel D-BCCH/dedicated access grant channel D-AGCH and a dedicated access grant channel D-RACH common channel.
The access network sends a 'data reporting indication' message to an application layer after receiving data of the terminal of the internet of things, wherein the message comprises 'spot beam ID, S-RTI, IMSI and data', and the application layer checks the data after receiving the message and returns a confirmation message to the access network, wherein the confirmation message can only comprise S-RNTI or S-RNTI and information (20bit) sent to a user.
The application layer can send public information to the terminal of the Internet of things, public parameters of the terminal of the Internet of things can be configured, the application layer sends a 'public information indication' message to the access network, and the access network sends the message to the terminal of the Internet of things and returns a result to the application layer.
The invention also provides a computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method described in the invention.
It is noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a mobile internet terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.
By the mode, when data needs to be collected, the notice is issued through the established D-BCCH or D-AGCH, and the Internet of things terminal reports the data through the D-RACH, so that small data volume collection is realized.
Referring to the application scenario of the internet of things, the considered service types are as follows:
(1) autonomous periodic reporting service type: such as intelligent utility (gas/water/electricity) measurement reports, intelligent agriculture, intelligent environments and the like, the uplink needs smaller data volume, the cycle is more in days and hours, and the data volume is hundreds of bytes;
(2) autonomous exception reporting service type: for example, the smoke alarm detector and the intelligent electric meter are informed of power failure, the uplink data has extremely small data volume requirement, the cycle is more in years and months, and the data volume is in a cross-section magnitude;
(3) network command service type: if the device is turned on/off, the device triggers to send an uplink report and requests meter reading, the device needs to download minimum data volume, the cycle is more in days and hours, and the data volume is in a cross-section magnitude;
(4) software update service type: for example, software patch/update, the uplink and downlink have large data volume requirements, the cycle is more in units of months and quarters, and the data volume is the magnitude of kilobytes;
(5) video monitoring service types: the uplink data volume is large, continuous transmission is needed, and the downlink data volume is small.
Depending on the service type, the requirements for the data volume of network data transmission can be classified into the following categories:
(1) uplink hundred byte magnitude, downlink ten hundred byte magnitude, discontinuous transmission
(2) Uplink cross level, downlink cross level, discontinuous transmission
(3) Uplink hundred-byte level, downlink kilobyte level, discontinuous transmission
(4) Continuous transmission of large uplink data volume and small downlink data volume
The terminal of the Internet of things is connected with a sensing network layer and a transmission network layer in the Internet of things to realize data acquisition and data transmission to the network layer. The method mainly completes various functions of data acquisition, preliminary processing, encryption, transmission and the like.
Generally, terminal devices of the internet of things can be classified into three types:
the system does not need mobility, has large data volume (uplink) and needs a wider frequency band, such as a city monitoring camera.
Secondly, the mobility is strong, frequent switching needs to be executed, and the data volume is small, such as motorcade tracking management.
And thirdly, mobility is not needed, the data volume is small, and the data volume is not sensitive to time delay, such as intelligent meter reading.
For adopting the satellite mobile communication of the heaven-earth-through one number as a data acquisition and transmission network, the requirement of mobility can not be considered because the coverage range of the satellite single-point beam reaches tens of thousands of square kilometers. Therefore, data transmission support is mainly considered to be provided for the type of the terminal of the internet of things for one type and three types of application scenes in the system.
For the third type of application, the battery is often adopted for power supply, and the internet of things terminal is generally required to have the characteristic of low power consumption.
At present, the business model of the mainstream operators for the internet of things still extends the traffic charging model.
However, for tracking and meter reading applications, traffic is generated only when tracking or reading reporting is needed, data traffic is small, and charging with traffic is not appropriate. However, the connection service provided by the method is high-value, and the benefits of both parties can be better protected by charging according to the number of connected devices.
The terminal of the Internet of things is specially processed by the access network, the terminal is accessed to a special application service, the access network simplifies the air interface process, and application data are transmitted to a specified service by the access network. The scheme is applicable to the following scenes:
acquisition process of small data volume
The method has the advantages of discontinuous reporting and limited sending times per day

Claims (8)

1. The utility model provides a thing networking data acquisition system based on satellite mobile communication system which characterized in that: the system comprises more than 1 Internet of things terminal, an access network element, more than 1 data server and more than 1 application server; each Internet of things terminal is connected with an access network element through a satellite data link; the access network element is respectively connected with each data server, and each data server is connected with each application server through the Internet; the protocol stack of the data server consists of an application layer (App), a transmission layer (TIP), a network layer (IP) and a Physical layer (Physical); the protocol stack at the side of a data server of the network element of the access network consists of a transmission layer TIP, a network layer IP and a Physical layer Physical, and the protocol stack at the side of a terminal of the internet of things consists of a Radio Resource Control (RRC) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer and a satellite Physical layer TT Physical; a protocol stack at the side of a data server of an access network element is connected with the protocol stack at the side of the data server through an Iu-T protocol interface, and a protocol stack at the side of an internet of things terminal is connected with the protocol stack at the terminal of the internet of things through a Uu air interface;
the data server transmits the information of 'D-BCCH establishment request', 'D-BCCH update request' and 'D-BCCH release indication' from each application server to the access network element; transmitting the information of 'D-BCCH establishment request response', 'D-BCCH update request response' and 'D-BCCH release indication response' from the access network element to a corresponding application server; after the data is checked, forwarding a data reporting indication message from an access network element to a corresponding application server; sending a data confirmation message to an access network element; the 'D-BCCH establishment request' information comprises a spot beam ID and the number of the special random access channels D-RACH; the number of the dedicated random access channels D-RACH is 1 or 2;
the access network element configures a special broadcast control channel D-BCCH/a special access allowing channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of 'receiving dedicated system information' on a common broadcast channel of a satellite mobile communication system, 'dedicated system information' on a dedicated broadcast control channel D-BCCH, 'acknowledgement response information' on a dedicated access grant channel D-AGCH, and 'data transmission request information' on a dedicated random access channel D-RACH; the special system information receiving is formed by loading the information of a special broadcast control channel D-BCCH in a reserved field of special system information;
after receiving the message of 'receiving special system information', each terminal receives 'special system information' on a special broadcast control channel D-BCCH, receives 'confirmation response information' on a special access permission channel D-AGCH and sends 'data transmission request information' on a special random access channel D-RACH, wherein the 'data transmission request information' comprises an international terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data.
2. The internet of things data acquisition system based on a satellite mobile communication system as claimed in claim 1, wherein: the Internet of things data acquisition system based on the satellite mobile communication system further comprises a charging server; the data server is connected with a charging server; and the charging server charges according to the number of the data reporting messages or charges according to the use time.
3. The internet of things data acquisition system based on a satellite mobile communication system of claim 1, wherein: the special broadcast control channel D-BCCH and the special access allowing channel D-AGCH are multiplexed on the same downlink transmission channel D-PC10D, the special broadcast control channel D-BCCH and the special access allowing channel D-AGCH take 64 frames as a cycle period, and every 8 frames form a group.
4. A data acquisition method for the internet of things data acquisition system based on the satellite mobile communication system as claimed in claim 1, wherein: the method comprises the following specific steps:
step 1: establishing a special broadcast channel: when the data server receives a 'D-BCCH establishment request' message sent by the application server, the message is forwarded to an access network element; the access network element configures a special broadcast control channel D-BCCH/a special access grant channel D-AGCH and a special random access channel D-RACH in a service channel in the spot beam ID indicated by the 'D-BCCH establishment request' message; broadcasting a message of 'receiving special system information' on a public broadcast channel of a satellite mobile communication system, and indicating each terminal to receive the special system information of a broadcast control channel D-BCCH in a corresponding time slot;
and 2, step: establishing a data channel: the access network element broadcasts special system information in a special broadcast control channel D-BCCH and indicates the time slot of a special access permission channel D-AGCH and a special random access channel D-RACH;
and step 3: uploading data: the terminal sends 'data transmission request' information to an access network element in a special random access channel D-RACH; the access network element sends a 'data reporting indication' message to the data server; the data reporting indication message comprises an international terminal sequence IMSI, a random number S-RTI, an application service number Server-ID and collected data in the data transmission request message;
and 4, step 4: data confirmation: after the data server checks the data, the data server forwards a data reporting indication message from an access network element to a corresponding application server; and sending a data confirmation message to the access network element.
5. The data acquisition method of claim 4, wherein: step 4, the data server sends a data confirmation message to the terminal through two discontinuous frames, and if the terminal receives the data confirmation message, the data transmission is finished; if the data acknowledgement message is not received in 64 frames, the terminal retransmits the collected data.
6. The data acquisition method of claim 4, wherein: and 3, for the data with the size larger than 40 bytes, the terminal transmits the data on the dedicated random access channel D-RACH in two times.
7. The data acquisition method of claim 4, wherein: the data acquisition method of the data acquisition system of the Internet of things further comprises the steps of updating resource configuration and releasing resources;
in the step of resource configuration updating, the data server forwards 'D-BCCH updating request' information from each application server to an access network element; the access network element reallocates a special broadcast control channel D-BCCH/special access permission channel D-AGCH and a special random access channel D-RACH according to the spot beam ID and the D-RACH number in the D-BCCH updating request information and then sends D-BCCH updating response information to the data server;
in the step of resource allocation release, the data server forwards 'D-BCCH release indication' information from each application server to an access network element; and the access network element releases a special broadcast control channel D-BCCH/special access permission channel D-AGCH and a special random access channel D-RACH according to the spot beam ID in the D-BCCH release indication information and then sends D-BCCH release indication response information to the data server.
8. The data acquisition method of claim 4, wherein: the data acquisition method of the data acquisition system of the Internet of things further comprises a reset step, and after the access network element and the data server are restarted to establish physical layer connection, the access network element and the data server mutually send reset indication information.
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Publication number Priority date Publication date Assignee Title
CN110445530B (en) * 2019-08-05 2021-11-16 天宸星通(深圳)科技有限公司 Airborne object networking terminal and information transmission method
CN111327403B (en) * 2020-02-25 2022-03-22 中国电子科技集团公司第五十四研究所 Enhanced RLC layer data transmission method
CN111599152A (en) * 2020-05-21 2020-08-28 国网河北省电力有限公司电力科学研究院 Acquisition terminal remote communication device based on satellite communication
CN112242868B (en) * 2020-10-23 2023-09-12 天宸星通(深圳)科技有限公司 Data transmission method of satellite Internet of things terminal capable of transmitting medium-high speed data
CN112104409B (en) * 2020-11-01 2021-02-19 北京天御云安科技有限公司 IP network communication maintaining method for terminal mobile access satellite system
CN113194485B (en) * 2021-07-01 2021-11-16 北京交通大学 Distributed communication system and control method
CN113904711A (en) * 2021-09-27 2022-01-07 中国电子科技集团公司第五十四研究所 Internet of things service transmission method for low-earth-orbit satellite mobile communication system
CN113965254B (en) * 2021-11-07 2024-04-30 中国电子科技集团公司第五十四研究所 Quick and reliable satellite mobile communication data transmission frame structure and method
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CN116131906B (en) * 2022-12-29 2024-05-24 中国电信股份有限公司卫星通信分公司 Registration method, device and system of satellite terminal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103701517A (en) * 2012-09-27 2014-04-02 电信科学技术研究院 Data transmission method and device used in satellite mobile communication system
CN108471320A (en) * 2018-02-02 2018-08-31 北京国电高科科技有限公司 A kind of communication means of uplink for data gathering system load

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3890400B1 (en) * 2016-12-07 2023-08-23 Hughes Network Systems, LLC Next generation mobile satellite system and gateway design

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103701517A (en) * 2012-09-27 2014-04-02 电信科学技术研究院 Data transmission method and device used in satellite mobile communication system
CN108471320A (en) * 2018-02-02 2018-08-31 北京国电高科科技有限公司 A kind of communication means of uplink for data gathering system load

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
天地一体化信息网络天基物联网应用体系研究;曾业等;《现代导航》;20161015(第05期);372-376 *

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