CN103199915A - Empty heaven and earth collaborative multimedia network system - Google Patents

Abstract

The invention relates to an air-space-ground collaborative multimedia network system, which is characterized in that the system includes a plurality of communication nodes, and each communication node is composed of space-based communication network equipment, land-based communication network equipment or space-based communication network equipment, within a radius of In the near-field area of no more than 100 kilometers, microwave communication is used between communication nodes, satellite communication is used between communication nodes in the near-field area and communication nodes in the remote area, and the data flow uses IP as the information bearing method to communicate. The invention can be used for remote search and rescue command in complex environments, and can also meet the requirements of air-to-ground live broadcast and real-time satellite relay of large-scale activities or events in the field of broadcasting and television.

Description

Air-Space-Ground Collaborative Multimedia Network System

technical field

The invention relates to a wireless communication network system, in particular to an air-space-ground integrated wireless communication network in which a plurality of communication nodes composed of air communication equipment, aerospace communication equipment and ground communication equipment are seamlessly connected to each other.

Background technique

With the continuous improvement of people's demand for network communication capabilities and communication quality, the integration of space, space and ground networks has become an inevitable trend in the development of space communication. The space-space-ground integrated network is a major information infrastructure that extends human activities to space, the open sea and even deep space, and it is also a hot spot in today's global technology and industrial development.

The space-space-ground integrated information network is composed of a number of satellites in different orbits, different types, and different performances forming a constellation covering the whole world. Through inter-satellite and satellite-ground links, users, aircraft, and various Communication platforms are densely integrated, using IP as the information bearing method, adopting intelligent high-speed on-board processing, switching and routing technologies, facing optical and infrared multi-spectral information, and in accordance with the principle of maximum effective comprehensive utilization of information resources, accurate information acquisition, fast An integrated high-speed broadband large-capacity information network for processing and efficient transmission, that is, a space-based, space-based and land-based integrated integrated network.

The air-space-ground integrated network has three main features. One is global seamless coverage, especially the earth observation and air traffic control network, which requires all-weather and all-weather seamless communication, navigation, observation and surveillance coverage around the world, and involves Space and various regions of the world, with a large coverage; second, flexible and maneuverable, with emergency networking capabilities to deal with emergencies; third, strong information coordination capabilities, which can manage and coordinate various information resources for different application services and optimization, to maximize the development and utilization of various information resources. Typical space-to-space networks mainly include earth observation networks, air traffic control Internet, and satellite networks.

The communication between space and space is mainly satellite communication. Satellite communication is radio communication between earth stations or between spacecraft and earth stations using communication satellite transponders. It is an important achievement of modern communication technology and an important aspect of space technology application. field. Communication between air and ground is currently widely used in civil aviation, aviation, meteorology and other fields, but the content transmitted is mostly data, voice, pictures, etc.; it is also used in broadcasting in the broadcasting industry, and aerial images of various events are transmitted to the ground.

Chinese patent 200910073444.7 discloses a "multi-layer satellite network stable grouping method based on five-vector mathematical model", which can be applied to the multi-layer satellite network environment in the air-space-ground integrated information network. This method does not involve the communication networking system architecture between space, space and ground.

Chinese patent 200610118736.4 discloses "a precision orbit determination system for medium and low orbit satellites and its realization method", and an innovative point in this invention mentions "the combination of SLR technology and Galileo system, and the integration of space and ground measurement technology Seamless connection", this technology is proposed for the integrated measurement technology of space, space and ground, and does not involve the communication network system architecture between space, space and ground.

Contents of the invention

The present invention aims at the needs of image, voice and other communication between air helicopters and ground personnel in a specific area, and the need to communicate with remote teams through satellites, and proposes a combination of air-to-air communication, air-to-ground communication, air-to-air communication and Air-space-ground collaborative multimedia network system that seamlessly integrates space-ground communications. This wireless communication network can not only be constructed and used in some special geographical topography and landform environments such as aerospace engineering or satellite engineering return capsule landing sites, mountain forest rescue, sea patrol salvage, etc., but also can be used in certain situations such as urban emergency linkage, emergency It is built and used in general urban environments such as real-time monitoring of events, real-time live broadcast of large-scale events and events.

The present invention is achieved through the following technical solutions:

The wireless communication network system is composed of multiple communication nodes. In the near-field area with a radius of no more than 100 kilometers, microwave communication is used between the air and ground communication nodes, and satellite communication is used between the remote nodes and the nodes in the near-field area. , the data flow communicates with IP as the information bearing method. Each communication node is composed of space-based communication network equipment, land-based communication network equipment, and space-based communication network equipment, among which:

The space-based communication equipment includes: airborne microwave communication equipment and airborne satellite communication equipment.

Airborne microwave communication equipment is carried by aviation aircraft (such as helicopters, balloons, etc.), and can perform two-way image and voice microwave communication with other microwave equipment within a certain range through a single antenna outside the aircraft. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h, and the radio frequency transmission power is not greater than 20W.

Airborne satellite communication equipment is used by aviation vehicles (such as helicopters, balloons, etc.), and can directly communicate with satellites in two directions, forward them to other satellite stations through satellites, or receive signals sent by other satellite stations. The equipment includes a satellite modem and an airborne satellite transceiver antenna, in which the satellite modem supports an Ethernet IP interface, and the modem baseband rate is greater than 2Mbps. The airborne satellite transmitting antenna is installed outside the helicopter, and it can be stabilized when the moving speed is greater than 250Km/h. Track satellites for communication.

The land-based communication network equipment includes: vehicle microwave communication equipment, backpack microwave communication equipment, ground satellite communication equipment and ground IP terminal equipment.

Vehicle-mounted microwave communication equipment can be used by ground vehicles, and conduct two-way image and voice microwave communication with other microwave equipment within a certain range around through a single antenna outside the vehicle. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h. The radio frequency transmission power is not greater than 20W, and the equipment conforms to the standard rack structure.

Backpack microwave communication equipment can be directly carried by personnel and used in walking, for image acquisition, and two-way voice microwave communication with other microwave equipment within a certain range through the single antenna on the equipment. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h, and the radio frequency transmission power is not greater than 2W. The device comes with its own battery for power supply, which can be used continuously for at least 1 hour. The structure and weight of the device are suitable for users to carry with them.

Ground satellite communication equipment can be used for direct two-way communication between ground fixed stations and satellites, forwarding to other satellite stations through satellites, or receiving signals sent by other satellite stations. The equipment includes a satellite modem and a ground satellite fixed transceiver antenna, wherein the satellite modem supports an Ethernet IP interface, and the modem baseband rate is greater than 2Mbps.

The ground IP terminal equipment can realize the two-way codec function between the analog video signal and the IP data packet, adopt VoIP technology for voice communication, and its IP terminal interface can be directly connected with the Ethernet interface of the satellite communication equipment for communication. The device adopts MPEG-2, MPEG-4, H.264, AVS and VC-1 lossy image data compression codec standards when realizing video codec; it adopts VoIP technology when realizing voice communication.

The space-based communication equipment includes: a communication satellite.

Communication satellites can use geosynchronous orbit communication satellites or relay satellites to receive uplink satellite signals from various places and perform downlink forwarding to connect space-based communication networks and land-based communication networks in various places.

In the application process of the air-space-ground collaborative multimedia network, each ground or air communication node can be the source or terminal of images and voices, and the service data is transferred to other nodes via microwave communication or satellite communication after IP conversion, forming point-to-point two-way communication or point-to-point communication. For multipoint broadcast communication, the sharing of business data is realized.

Description of drawings

FIG. 1 is a block diagram of an embodiment of the air-space-ground collaborative multimedia network system of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the drawings and embodiments, but the protection scope of the present invention should not be limited thereto.

Fig. 1 is a block diagram of an embodiment of the air-space-ground collaborative multimedia network system of the present invention, which is used to serve the search and rescue work of some return module landing sites such as aerospace engineering or satellite engineering, as shown in the figure, the near-field area in this embodiment It consists of four communication nodes: an air communication helicopter 11, an air microwave helicopter 12, a ground communication vehicle 13, and a ground communicator 14, and microwave communication is used between them; the communication nodes in remote areas are ground fixed satellite stations 15, The communication satellite 7 establishes two-way communication between the near-field area and the remote area by means of satellite communication, and the data flow in the network communicates with IP as the information bearing method, forming a network structure based on the integration of space, space and ground.

Airborne microwave communication equipment 1 and airborne satellite communication equipment 2 are equipped on the airborne communication helicopter 11 in the airborne communication node in the near-field area. Airborne microwave communication equipment 1 is equipped on the microwave helicopter 12 in the air.

Airborne microwave communication equipment 1 is installed in the helicopter cabin for use, and a single omnidirectional antenna is installed outside the helicopter to perform two-way image and voice microwave communication with other air and ground microwave equipment within a certain range around. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h, and the radio frequency transmission power is not greater than 20W.

Airborne satellite communication equipment 2 is installed in the helicopter cabin for use, and can carry out direct two-way communication with satellites, forward to other satellite stations through satellites, or receive signals sent by other satellite stations. The equipment includes a satellite modem and an airborne satellite transceiver antenna, wherein the satellite modem supports an Ethernet IP interface, and the modem baseband rate is greater than 2Mbps. The airborne satellite transmitting antenna is installed outside the helicopter, which supports stable tracking of satellites for communication when the moving speed is greater than 250Km/h.

The ground communication vehicle in the ground communication node in the near-field area is equipped with vehicle-mounted microwave communication equipment 3 and ground satellite communication equipment 5 . The ground communicator carried a backpack microwave communication device 4 .

The vehicle-mounted microwave communication equipment 3 is installed in the ground communication vehicle, and performs two-way image and voice microwave communication with the microwave equipment in the air communication helicopter through a single antenna outside the vehicle. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h. The radio frequency transmission power is not greater than 20W, and the equipment conforms to the standard rack structure.

The ground satellite communication equipment 5 is installed in the ground communication vehicle, and performs direct two-way communication with the satellite, forwards to other satellite stations through the satellite, or receives signals sent by other satellite stations. The equipment includes a satellite modem and a ground satellite fixed transceiver antenna, wherein the satellite modem supports an Ethernet IP interface, and the modem baseband rate is greater than 2Mbps. The ground satellite fixed transceiver antenna is installed on the top of the communication vehicle for use.

The backpack-type microwave communication device 4 is directly carried by the ground communicator and used in walking for image acquisition, and conducts two-way voice microwave communication with the microwave device in the air communication helicopter through the single antenna on the device. The device integrates video IP codec module, voice VoIP module, network switching module, microwave modem module and radio frequency single antenna transceiver front-end device. The microwave modulation and demodulation baseband rate is greater than 2Mbps, and it supports stable communication when the moving speed is greater than 250Km/h, and the radio frequency transmission power is not greater than 2W. The device comes with its own battery, which can last for at least 1 hour.

The remote communication node is a fixed satellite station on the ground, which is equipped with ground satellite communication equipment 5 and ground IP terminal equipment 6 .

The ground IP terminal equipment 6 is connected with the ground satellite communication equipment, which can realize the two-way encoding and decoding function between the analog video signal and the IP data packet, and uses VoIP technology for voice communication, and its IP terminal interface can be connected with the Ethernet interface of the satellite communication equipment Direct connection for communication. The device adopts MPEG-2, MPEG-4, H.264, AVS and VC-1 lossy image data compression codec standards when realizing video codec; it adopts VoIP technology when realizing voice communication.

Two-way communication is established between the near-field area and the remote area by the communication satellite 7 in the form of satellite communication. Among them, the air communication helicopter can communicate with the remote ground fixed satellite station through the relay satellite, and the ground communication vehicle can communicate with the remote ground fixed satellite station through the geosynchronous orbit communication satellite. The two satellite communication links can exist independently or at the same time as mutual backup to ensure the normal communication of business data during mission execution.

Obviously, the air-space-ground collaborative multimedia network of the present invention can also select different configurations according to different applications on the basis of the above-mentioned basic network architecture to form different types of communication networks, such as a network composed of buildings and multiple vehicles in a city. A network composed of base stations on small islands and multiple ships in a certain sea area, etc. In this way, a multi-node air-space-ground integrated wireless communication network can be realized under various usage environments and conditions.

Claims (11)

1. An air-space-ground collaborative multimedia network system, characterized in that the system includes a plurality of communication nodes, each communication node is composed of space-based communication network equipment, land-based communication network equipment or space-based communication network equipment, within different radiuses In the near-field area of more than 100 kilometers, microwave communication is used between communication nodes, and satellite communication is used between communication nodes in the near-field area and communication nodes in the remote area, and the data flow is carried by IP. communication. 2. The air-space-ground collaborative multimedia network system according to claim 1, wherein the space-based communication equipment comprises: Airborne microwave communication equipment (1), used for two-way image and voice microwave communication with other microwave equipment within a range of 80km around the aircraft through its single antenna; and/or The airborne satellite communication equipment (2) is used for direct two-way communication with the satellite through its single antenna on the aircraft, and forwards the signal to other satellite stations through the satellite, or receives the signal sent by other satellite stations. 3. The air-space-ground collaborative multimedia network system according to claim 2, wherein the airborne microwave communication equipment is carried by an aviation vehicle, and the equipment internally integrates a video IP codec module, a voice VoIP module, a network switching module, Microwave modulation and demodulation module and RF single-antenna transceiver front-end device, microwave modulation and demodulation baseband rate is greater than 2Mbps, supports stable communication when the moving speed is greater than 250Km/h, and the radio frequency transmission power is not greater than 20W. 4. The air-space-ground collaborative multimedia network system according to claim 2, wherein the airborne satellite communication equipment is carried by an aircraft, including a satellite modem and an airborne satellite transceiver antenna, wherein the satellite modem supports Ethernet IP The interface and the modem baseband rate are all greater than 2Mbps. The airborne satellite transmitting antenna is installed outside the helicopter, which supports stable tracking of satellites for communication when the moving speed is greater than 250Km/h. 5. The air-space-ground collaborative multimedia network system according to claim 2 or 3, wherein said aviation vehicle is a helicopter or a balloon. 6. The air-space-ground collaborative multimedia network system according to claim 1, wherein the ground-based communication network equipment includes any equipment in vehicle-mounted microwave communication equipment and backpack microwave communication equipment, as well as ground satellite communication equipment and Any device in the ground IP terminal equipment; The vehicle-mounted microwave communication device is used to carry out two-way image and voice microwave communication with other microwave devices within a range of 80km around the vehicle through a single antenna outside the vehicle; The backpack-type microwave communication device is directly carried by personnel and used in walking, for image acquisition, and carries out two-way voice microwave communication with other microwave devices within the surrounding 80km range through the single antenna on the backpack-type microwave communication device; The ground satellite communication equipment is used for direct two-way communication between the ground fixed station and the satellite, forwarding to other satellite stations through the satellite, or receiving signals sent by other satellite stations; The ground IP terminal equipment realizes the two-way encoding and decoding function between the analog video signal and the IP data packet, uses VoIP technology for voice communication, and its IP terminal interface can be directly connected with the Ethernet interface of the satellite communication equipment for communication. 7. The air-space-ground collaborative multimedia network system according to claim 6, wherein the vehicle-mounted microwave communication device is carried by a ground vehicle, and the device internally integrates a video IP codec module, a voice VoIP module, a network switching module, a microwave Modem module and RF single-antenna transceiver front-end device, the microwave modulation and demodulation baseband rate is greater than 2Mbps, supports stable communication when the moving speed is greater than 250Km/h, the radio frequency transmission power is not greater than 20W, and the equipment conforms to the standard rack structure. 8. The air-space-ground collaborative multimedia network system according to claim 6, wherein the integrated video IP codec module, voice VoIP module, network switching module, microwave modem module and RF single-antenna transceiver front-end device, the microwave modulation and demodulation baseband rate is greater than 2Mbps, supports stable communication when the moving speed is greater than 250Km/h, the RF transmission power is not greater than 2W, the device is powered by a battery, and can be used continuously for at least 1 hour. The structure and weight are suitable for users to carry with them. 9. The air-space-ground collaborative multimedia network system according to claim 6, wherein the ground satellite communication equipment includes a satellite modem and a ground satellite fixed transceiver antenna, wherein the satellite modem supports an Ethernet IP interface, and the modem baseband The rate is greater than 2Mbps. 10. The air-space-ground collaborative multimedia network system according to claim 6, wherein the ground IP terminal equipment adopts MPEG-2, MPEG-4, H.264, AVS or VC- 1 Lossy image data compression codec standard; VoIP technology is used when realizing voice communication. 11. The air-space-ground collaborative multimedia network system according to claim 1, wherein the space-based communication equipment comprises: Communication satellites: Receive uplink satellite signals from various places and perform downlink forwarding, which is used to connect space-based communication networks and land-based communication networks in various places.