CN112968973A - Non-ground network communication system and method - Google Patents
Non-ground network communication system and method Download PDFInfo
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- CN112968973A CN112968973A CN202110321869.6A CN202110321869A CN112968973A CN 112968973 A CN112968973 A CN 112968973A CN 202110321869 A CN202110321869 A CN 202110321869A CN 112968973 A CN112968973 A CN 112968973A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/562—Brokering proxy services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention provides a non-ground network communication system and a method, comprising the following steps: the system comprises an aerial communication platform, an Internet of things terminal, an agent node and a base station; establishing uplink transmission and downlink transmission between the terminal of the Internet of things and the base station; the uplink transmission established between the terminal of the Internet of things and the base station comprises a communication node passing through the terminal of the Internet of things, the proxy node, the aerial communication platform and the base station; and the downlink transmission established between the terminal of the Internet of things and the base station comprises communication nodes passing through the base station, the aerial communication platform and the terminal of the Internet of things.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a non-terrestrial network communication system and method.
Background
The invention relates to a Non-terrestrial network (NTN), in particular to a Non-terrestrial network communication system, which is suitable for a mobile broadband communication system formed by fusing an air communication platform represented by a 5G (fifth generation mobile communication system) and a B5G (later 5G mobile communication system) with a terrestrial communication network.
With the increasing maturity of 5G (fifth generation mobile communication system) technology, the convergence of non-terrestrial communication platforms represented by satellites and terrestrial communication networks draws more and more attention, standardization organizations including 3GPP (third generation mobile communication partnership project) and ITU (international telecommunication union) have established a special working group to address the standardization problem of satellite-to-ground convergence, and leading enterprises and research organizations in the industry are also involved in the research and industrial work of satellite-to-ground integration.
Taking 3GPP (third generation partnership project) as an example, research work for satellite-to-ground fusion is being carried out starting from R14 (release 14). In a research project named "5G new air interface in' Non-ground network oriented" by 3GPP, a deployment scenario of a Non-ground network (NTN) including a satellite network is defined. The role and advantages of satellites in 5G systems are discussed in technical specification TS 22.261. As one of 5G access technologies, satellites have obvious advantages in some industrial application scenarios requiring wide area coverage, and can provide a low-cost coverage scheme in a region with weak ground network coverage.
For B5G and 6G mobile communication systems, how to carry internet of things services in a non-terrestrial network is one of the key technical problems that needs to be solved urgently. The terminal equipment of the internet of things is often limited in power, limited in processing capability and free of positioning capability. Due to the limitation of various software and hardware capabilities, the terminal device of the internet of things cannot be easily combined with non-ground network communication nodes such as satellites and the like the traditional broadband device to form a fused communication system. In the existing transmission system of the internet of things, the transmission distance is in the order of several meters to several kilometers; under the application scene of the non-ground network, the transmission distance between the terminal of the internet of things and the non-ground network reaches dozens of kilometers to tens of thousands of kilometers. Especially, the limited transmitting power of the uplink and the terminal of the internet of things cannot effectively support the normal communication capability of the terminal and the aerial communication platform. In contrast, in the downlink aspect, the terminal receiving capability of the internet of things is not obviously affected by the longer communication distance.
The prior art thought of accessing a ground internet of things terminal to an aerial communication platform is to make up for the deficiency of the communication capacity of internet of things equipment through a gateway. Under the communication architecture, the downlink communication capacity of the aerial communication platform is limited, data relay between the aerial communication platform and the internet of things terminal needs to be carried out through the gateway, the gateway becomes a bottleneck of the communication capacity between the aerial communication platform and the ground internet of things terminal, communication delay and data throughput performance indexes are deteriorated, and communication signaling overhead is increased.
In summary, in consideration of asymmetric transmission capability between an air communication platform and a ground internet of things terminal in a non-ground network, the prior art thought has an obvious technical defect in the case that the non-ground network carries the internet of things terminal service.
The internet of things terminal or internet of things equipment is generally communication equipment which is located near the earth surface and has insufficient budget for an uplink communication link with an aerial communication platform due to factors such as limited power supply or limited transmitting power. The uplink communication link budget with the air communication platform is insufficient, and the uplink communication link budget may be a problem faced by the terminal of the internet of things persistently or temporarily.
Disclosure of Invention
In view of the defects in the prior art, the present invention is directed to a non-terrestrial network communication system and method.
According to the present invention, there is provided a non-terrestrial network communication system comprising: the system comprises an aerial communication platform, an Internet of things terminal, an agent node and a base station;
establishing uplink transmission and downlink transmission between the terminal of the Internet of things and the base station;
the uplink transmission established between the terminal of the Internet of things and the base station comprises a communication node passing through the terminal of the Internet of things, the proxy node, the aerial communication platform and the base station;
and the downlink transmission established between the terminal of the Internet of things and the base station comprises communication nodes passing through the base station, the aerial communication platform and the terminal of the Internet of things.
Preferably, the aerial communication platform can establish communication connection with the internet of things terminal and the agent node;
the aerial communication platform comprises a geostationary orbit satellite GEO, a medium orbit satellite MEO, a low orbit satellite LEO, an unmanned aerial vehicle and an air-lift hot air balloon.
Preferably, the proxy node implements an uplink relay function, has a transmission power and software and hardware processing capability meeting preset requirements, and can establish a communication link with an air communication platform.
Preferably, the base station comprises a logical processing entity with air interface convergence capability of the wireless communication network, including a mobile cellular communication system base station and a wireless communication system access port.
Preferably, the over-the-air communication platform and the base station comprise: the aerial communication platform and the base station are two independent logical communication nodes, and the actual network allows the co-location construction or the realization in the same physical communication entity.
Preferably, the uplink and downlink comprise: the communication links for the uplink and downlink may include single-link, dual-link, and/or multi-link transmission.
The single link comprises that only one uplink transmission path or one downlink transmission path exists between the terminal of the Internet of things and the base station.
The double links comprise two uplink transmission paths or two downlink transmission paths between the terminal of the internet of things and the base station.
The multi-link comprises three or more uplink transmission paths or three or more downlink transmission paths existing between the terminal of the internet of things and the base station.
Preferably, the aerial communication platform comprises: the communication functions of the aerial communication platform for the uplink and the downlink comprise a transmission mode of transparent forwarding and signal regeneration;
the transparent forwarding comprises that the aerial communication platform forwards the received wireless signals only after finishing radio frequency processing and related operations;
the signal regeneration comprises that the air communication platform completes part or all of the communication system air interface protocol processing flow of the base station to the received wireless signal and then forwards the wireless signal.
Preferably, the proxy node implements an uplink relay function including: one or more terminals of the Internet of things are replaced to realize uplink communication with the aerial communication platform;
the proxy node comprises presetting or temporary selection;
the proxy nodes comprise ground fixed, ground mobile, air fixed and air mobile forms.
Preferably, the uplink and downlink comprise: the air interface technologies between the air communication platform participating in uplink and downlink communication, the internet of things terminal and the proxy node are completely the same, partially the same or completely different.
The invention provides a non-ground network communication method, which comprises the following steps: establishing uplink transmission and downlink transmission between the terminal of the Internet of things and the base station;
the uplink transmission established between the terminal of the Internet of things and the base station comprises a communication node passing through the terminal of the Internet of things, the proxy node, the aerial communication platform and the base station;
and the downlink transmission established between the terminal of the Internet of things and the base station comprises communication nodes passing through the base station, the aerial communication platform and the terminal of the Internet of things.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention solves the problem that a continuous effective uplink communication link cannot be established for the Internet of things terminal with limited uplink power and a non-ground network aerial communication platform;
2. the low-power and limited-transmission-power internet-of-things terminal can establish an uplink of a non-ground network aerial communication platform without obstacles and can maintain longer-time communication capacity before the power supply is exhausted.
3. The invention simultaneously considers the system design appeal in two aspects of longer uplink communication time and higher downlink communication efficiency when the non-ground network bears the service of the Internet of things.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an example of a transparent-architecture non-terrestrial network communication system with a terrestrial base station as a proxy node;
fig. 2 is an example of a non-terrestrial network communication system with a regeneration architecture with a drone as a proxy node.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
Aiming at the defects of the prior art: the limited transmitting power of the terminal of the internet of things cannot effectively support the continuous normal communication capability of the terminal of the internet of things and an uplink of an aerial communication platform. The technical idea of accessing the internet of things terminal to the aerial communication platform in the prior art cannot simultaneously consider system constraints in two aspects of uplink power limitation and downlink communication efficiency. The invention provides a non-ground network communication system, which aims at the problem that non-ground networks in 5G and 5G mobile communication systems bear the Internet of things. Aiming at an application scene that a non-ground network bears the service of the Internet of things, the communication system comprises communication nodes such as an air communication platform, an Internet of things terminal, an agent node and a base station. The uplink transmission between the terminal of the internet of things and the base station needs to be relayed by the proxy node, and the uplink communication link comprises communication nodes such as the terminal of the internet of things, the proxy node, an air communication platform and the base station; the downlink transmission does not pass through the proxy node and only comprises communication nodes such as a base station, an air communication platform, an internet of things terminal and the like.
According to the non-ground network communication system provided by the invention, the communication system comprises communication nodes such as an aerial communication platform, an Internet of things terminal, an agent node and a base station.
Specifically, uplink transmission between the terminal of the internet of things and the base station needs to pass through communication nodes such as the terminal of the internet of things, the proxy node, the air communication platform, and the base station.
Specifically, downlink transmission between the terminal of the internet of things and the base station needs to pass through communication nodes such as the base station, the air communication platform, the terminal of the internet of things and the like.
Specifically, the aerial communication platform is applicable to all aerial communication platform types capable of establishing communication connection with the internet of things terminal and the agent terminal, including but not limited to GEO (geostationary orbit satellite), MEO (medium orbit satellite), LEO (low orbit satellite), unmanned aerial vehicle, and levitation fire balloon.
Specifically, the internet of things terminal of the communication system refers to a terminal device which cannot directly establish uplink connection with the air communication platform due to limited transmission power, or a terminal device which indirectly establishes uplink connection with the air communication platform through proxy node relaying is preferentially considered for power saving.
Specifically, the proxy node of the communication system has enough transmission power and software and hardware processing capacity, and can establish a communication link with an air communication platform.
Specifically, the base station of the present communication system refers to all logical processing entities with air interface convergence capability of the wireless communication network, including but not limited to a mobile cellular communication system base station, and a wireless communication system Access Point (AP).
Specifically, the air communication platform and the base station are two independent logical communication nodes, and the actual network allows co-location construction or implementation in the same physical communication entity.
Specifically, uplink and downlink communication links between the terminal of the internet of things and the base station may include single link, dual link, multi link, and other transmission modes.
The single-chain joint finger is characterized in that only one uplink transmission path or one downlink transmission path exists between a certain internet of things terminal and a certain base station.
The double-chain joint refers to that two uplink transmission paths or two downlink transmission paths exist between a certain internet of things terminal and a certain base station.
The multi-link refers to that three or more uplink transmission paths or three or more downlink transmission paths exist between a certain internet of things terminal and a certain base station.
Specifically, the over-the-air communication platform has communication functions for uplink and downlink, including but not limited to transparent forwarding, signal regeneration, and other transmission modes.
The transparent forwarding finger forwards the received wireless signal only after completing the radio frequency processing and related operations by the aerial communication platform.
The signal regeneration means that the air communication platform forwards the received wireless signal after completing part or all of the air interface protocol processing flow of the communication system of the base station.
Specifically, the proxy node realizes an uplink relay function, and replaces one or more internet of things terminals to realize uplink communication with the air communication platform.
The selection of the proxy node may be preset or temporarily selected.
The agent node can be in the forms of ground fixation, ground movement, air fixation, air movement and the like;
specifically, the air interface technologies of the air communication platform, the internet of things terminal and the proxy node participating in uplink and downlink communication may be completely the same, partially the same or completely different.
Example 2
Example 2 is a preferred example of example 1
Fig. 1 is an example of a transparent non-terrestrial network communication system with a terrestrial base station as a proxy node.
The non-ground network communication system comprises communication nodes such as an air communication platform LEO satellite, a ground internet of things terminal, an agent node and a base station.
Uplink transmission between the ground internet of things terminal and the base station needs to pass through communication nodes such as the ground internet of things terminal, the proxy node, the LEO satellite of the air communication platform, the base station and the like.
Downlink transmission between the ground internet of things terminal and the base station needs to pass through communication nodes such as the base station, an air communication platform LEO satellite and the ground internet of things terminal.
In this example of a communication system, the aerial communication platform is a LEO (low orbit satellite).
In the communication system example, the ground internet of things terminal relates to internet of things equipment such as a fire alarm sensor and an electric power valve. The internet of things equipment has limited battery power or insufficient current remaining power, and establishing an uplink with an LEO satellite of an air communication platform through a proxy node is more preferable.
In the example of the communication system, the proxy node is a mobile communication system base station which conforms to the 3GPP standard, has enough transmitting power and software and hardware processing capacity, and can efficiently establish a communication link with an LEO satellite of an air communication platform.
In the example of the communication system, the base station is a mobile communication system base station conforming to the 3GPP standard, and has complete air interface protocol processing capability of the cellular mobile communication system.
In the example of the communication system, an LEO satellite and a base station of an air communication platform are two independent physical communication nodes, and logic functions are realized in two different physical entities.
In the example of the communication system, only one uplink/downlink transmission path exists between a certain ground internet of things terminal and a base station, and the transmission path is a single-link transmission mode.
In the example of the communication system, the communication function of the aerial communication platform LEO satellite for the uplink and the downlink belongs to a transparent forwarding transmission mode, namely the aerial communication platform LEO satellite forwards a received wireless signal only after completing radio frequency processing and related operations.
The proxy node base station realizes an uplink relay function and replaces a plurality of ground internet of things terminals to realize uplink communication with the LEO satellite. The communication environment of the Internet of things terminal and the agent node base station is stable, the agent node is in a ground fixed mode, and the agent node is selected in a preset mode.
The air interface technologies of the LEO satellite, the ground Internet of things terminal and the proxy node base station participating in the uplink and downlink communication are completely the same and are 5G air interface technologies.
Example 3
Example 3 is a preferred example of example 1 and/or example 2
FIG. 2 is an example of a non-terrestrial network communication system with a regeneration architecture with an unmanned aerial vehicle as a proxy node
The non-ground network communication system comprises communication nodes such as an air communication platform LEO satellite, a ground internet of things terminal, an agent node unmanned aerial vehicle and a base station.
Uplink transmission between the ground internet of things terminal and the base station needs to pass through communication nodes such as the ground internet of things terminal, the agent node unmanned aerial vehicle, the LEO satellite of the aerial communication platform, the base station and the like.
Downlink transmission between the ground internet of things terminal and the base station needs to pass through communication nodes such as the base station, an air communication platform LEO satellite and the ground internet of things terminal.
In this example of a non-terrestrial network communication system, the aerial communication platform is a LEO (low orbit satellite).
In the communication system example, the ground internet of things terminal relates to internet of things equipment such as a fire alarm sensor and an electric power valve. The battery power of the internet of things equipment is limited, or the current residual power is insufficient, and it is more preferable that the unmanned aerial vehicle establishes an uplink with the LEO satellite of the air communication platform through the proxy node.
In the communication system example, the agent node is an unmanned aerial vehicle, has enough transmitting power and software and hardware processing capacity, and can efficiently establish a communication link with an LEO satellite of an aerial communication platform.
In the example of the communication system, the base station is a mobile communication system base station conforming to the 3GPP standard, and has complete air interface protocol processing capability of the cellular mobile communication system.
In the communication system example, the LEO satellite and the base station of the aerial communication platform are independent physical communication nodes, and logic functions are realized in the LEO satellite of the aerial communication platform.
In the example of the communication system, only one uplink/downlink transmission path exists between a certain ground internet of things terminal and a base station, and the transmission path is a single-link transmission mode.
The communication function of the air communication platform LEO satellite for the uplink and the downlink belongs to a signal regeneration transmission mode, namely the air communication platform LEO satellite transmits a part or all of the communication system air interface protocol processing flow of the base station to the received wireless signal.
The proxy node unmanned aerial vehicle realizes an uplink relay function, and replaces a plurality of ground internet of things terminals to realize uplink communication with the LEO satellite. The terminal of the internet of things and the agent node unmanned aerial vehicle are possibly temporarily deployed, the communication environment and the communication relation are unstable, the agent node unmanned aerial vehicle is in an air moving mode, and the agent node is selected in a temporarily selected mode.
The LEO satellite, the ground Internet of things terminal and the agent node unmanned aerial vehicle which participate in uplink and downlink communication have different air interface technologies. The communication interfaces between the LEO satellite and the ground Internet of things terminal and between the LEO satellite and the agent node unmanned aerial vehicle are WiFi air interface technology, and the uplink communication link between the ground Internet of things terminal and the agent node unmanned aerial vehicle relay adopts GPRS air interface technology.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A non-terrestrial network communication system, comprising: the system comprises an aerial communication platform, an Internet of things terminal, an agent node and a base station;
establishing uplink transmission and downlink transmission between the terminal of the Internet of things and the base station;
the uplink transmission established between the terminal of the Internet of things and the base station comprises a communication node passing through the terminal of the Internet of things, the proxy node, the aerial communication platform and the base station;
and the downlink transmission established between the terminal of the Internet of things and the base station comprises communication nodes passing through the base station, the aerial communication platform and the terminal of the Internet of things.
2. The non-terrestrial network communication system according to claim 1, wherein the aerial communication platform is capable of establishing communication connections with terminals of the internet of things and agent nodes;
the aerial communication platform comprises a geostationary orbit satellite GEO, a medium orbit satellite MEO, a low orbit satellite LEO, an unmanned aerial vehicle and an air-lift hot air balloon.
3. The system according to claim 1, wherein the proxy node implements an uplink relay function, has a transmit power and hardware and software processing capability to meet a predetermined requirement, and is capable of establishing a communication link with an over-the-air communication platform.
4. The non-terrestrial network communication system according to claim 1, wherein the base station comprises a logical processing entity with wireless communication network air interface convergence capability, comprising a mobile cellular communication system base station and a wireless communication system access port.
5. The non-terrestrial network communication system according to claim 1, wherein the aerial communication platform and the base station comprise: the aerial communication platform and the base station are two independent logical communication nodes, and the actual network allows the co-location construction or the realization in the same physical communication entity.
6. The non-terrestrial network communication system according to claim 1, wherein the uplink and downlink comprise: the communication links for the uplink and downlink may include single-link, dual-link, and/or multi-link transmission.
The single link comprises that only one uplink transmission path or one downlink transmission path exists between the terminal of the Internet of things and the base station.
The double links comprise two uplink transmission paths or two downlink transmission paths between the terminal of the internet of things and the base station.
The multi-link comprises three or more uplink transmission paths or three or more downlink transmission paths existing between the terminal of the internet of things and the base station.
7. The non-terrestrial network communication system according to claim 1, wherein the aerial communication platform comprises: the communication functions of the aerial communication platform for the uplink and the downlink comprise a transmission mode of transparent forwarding and signal regeneration;
the transparent forwarding comprises that the aerial communication platform forwards the received wireless signals only after finishing radio frequency processing and related operations;
the signal regeneration comprises that the air communication platform completes part or all of the communication system air interface protocol processing flow of the base station to the received wireless signal and then forwards the wireless signal.
8. The non-terrestrial network communication system according to claim 1, wherein the proxy node implements an uplink relay function including: one or more terminals of the Internet of things are replaced to realize uplink communication with the aerial communication platform;
the proxy node comprises presetting or temporary selection;
the proxy nodes comprise ground fixed, ground mobile, air fixed and air mobile forms.
9. The non-terrestrial network communication system according to claim 1, wherein the uplink and downlink comprise: the air interface technologies between the air communication platform participating in uplink and downlink communication, the internet of things terminal and the proxy node are completely the same, partially the same or completely different.
10. A method of non-terrestrial network communication, comprising: establishing uplink transmission and downlink transmission between the terminal of the Internet of things and the base station;
the uplink transmission established between the terminal of the Internet of things and the base station comprises a communication node passing through the terminal of the Internet of things, the proxy node, the aerial communication platform and the base station;
and the downlink transmission established between the terminal of the Internet of things and the base station comprises communication nodes passing through the base station, the aerial communication platform and the terminal of the Internet of things.
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