CN111510194A - Beidou third-auxiliary satellite communication network access method, control station and terminal - Google Patents

Beidou third-auxiliary satellite communication network access method, control station and terminal Download PDF

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Publication number
CN111510194A
CN111510194A CN202010235955.0A CN202010235955A CN111510194A CN 111510194 A CN111510194 A CN 111510194A CN 202010235955 A CN202010235955 A CN 202010235955A CN 111510194 A CN111510194 A CN 111510194A
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module
rdss
communication network
terminal
control station
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CN111510194B (en
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张锴
陈晓峰
丁峰
李海洲
罗丁
杜晓华
蒙连胜
齐跃震
王春锋
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26th Unit 96901 Unit Chinese Pla
Hunan Aerospace Electronic Technology Co ltd
Space Star Technology Co Ltd
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26th Unit 96901 Unit Chinese Pla
Hunan Aerospace Electronic Technology Co ltd
Space Star Technology Co Ltd
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    • 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
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

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

Abstract

The invention provides a Beidou third-auxiliary satellite communication network access method, a control station and a terminal for solving the technical problems that the traditional satellite communication network access stage is difficult to consider the contradiction between complexity and safety and the like, wherein the control station comprises a BSC module and a BTS module, the BSC module is connected with the BTS module, and the RDSS module is connected with the BSC module; the terminal comprises a modem module and a spectrum sensing module, wherein the modem module is connected to the satellite communication network, and the terminal also comprises an RDSS module which is connected with the modem module and the spectrum sensing module. The invention fully exerts the advantages of wide Beidou No. three coverage range, strong anti-interference capability, simple and flexible communication mechanism and the like, and enhances the safety, reliability and intelligent level of the random dynamic access of the satellite communication network.

Description

Beidou third-auxiliary satellite communication network access method, control station and terminal
Technical Field
The invention belongs to the technical field of satellite communication networks, and particularly relates to an access method, a control station and a terminal of a satellite communication network based on Beidou No. three assistance.
Background
The satellite communication network system has the advantages of wide coverage range, long communication distance and the like, and is particularly suitable for communication guarantee of the area which cannot be covered by the terrestrial communication network. For fixed satellite Station services, static modes such as pre-allocation of frequency resources are generally adopted, and for Mobile satellite Station services, Mobile terminals (MS) have a large maneuvering range and strong service burstiness, and dynamic random network access must be realized.
The conventional Access of the satellite communication network generally requires a Broadcast Control Channel (BCCH), a Random Access Channel (RACH), and an Access Granted Channel (AGCH). The BCCH channel is a downlink channel, broadcasts the idle access resource information of the system, the RACH channel is an uplink channel, a terminal sends a network access application to a network management center (control station), and the AGCH channel is a downlink channel, broadcasts information such as timing and special control channels. The three channels can be realized differently by different satellite communication network systems, but the same access function is completed.
The BCCH signal is a signal which needs to be searched first after the terminal is started, the terminal transmits the RACH signal after searching the BCCH signal, and in a network with a large scale, the RACH signal is generally a narrowband non-spread spectrum signal, so that the receiving complexity of a Base Transceiver Station (BTS) when a large-scale concurrent application occurs is reduced. After confirming that there is an idle resource, a Base Station Controller (BSC) broadcasts an AGCH message to a terminal through a BTS, including a Stand-Alone Dedicated Control Channel (SDCCH) description, a TDMA frame number of a received Channel application message, an initialization time advance TA value, an initialization maximum transmission power, a random identifier, and the like. The terminal analyzes the AGCH message, adjusts the local time and completes the access through the SDCCH channel.
The existing satellite communication network system design is usually a non-spread spectrum narrowband system with fixed frequency, can shorten the terminal search time and reduce the terminal implementation complexity, but can cause the BCCH signal to become the weakness of the system, and is easy to expose, weak in anti-interference capability and low in safety. The RACH signal is generally a narrowband non-spread spectrum signal, the information capacity is generally strictly limited, and only necessary information required for initial network access is transmitted, which results in insufficient support for intelligent network access based on cognitive radio. The AGCH method only supports the conventional peer-to-peer network access, and the network access support for the group or the cluster is insufficient.
Disclosure of Invention
The invention provides an access method, a control station and a terminal of a Beidou third auxiliary satellite communication network, aiming at the defects related in the background technology, and the technical problems that in the traditional satellite communication network system design, the contradiction between complexity and safety is difficult to be considered in the network access stage and the like are solved by utilizing the advantages of wide Beidou third coverage range, strong anti-interference capability, simple and flexible communication mechanism and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to one aspect of the invention, a Beidou third auxiliary satellite communication network access method is provided, and the method comprises the following steps:
and S1, the control station and the terminal establish a Beidou third RDSS short message communication network.
S2, the control station broadcasts the encrypted BCCH channel through the satellite communication network.
And S3, the control station broadcasts the encryption characteristics of the BCCH channel through the Beidou third RDSS short message communication network.
S4, the terminal parses the contents of the received BCCH channel.
And S5, the terminal submits networking application data to the control station through the Beidou third RDSS short message communication network.
And S6, the control station broadcasts the planned satellite communication network parameters through the Beidou third RDSS short message communication network.
And S7, the terminal accesses the satellite communication network according to the received satellite communication network parameters.
Further, the control station and the terminal establish a big dipper third RDSS short message communication network, which specifically includes:
and the RDSS module of the control station is connected with the RDSS module of the terminal to establish a Beidou third RDSS short message communication network.
The control station is configured as an RDSS group leader, and the terminal is configured as an RDSS group member.
Further, the broadcasting, by the control station, of the encrypted BCCH channel via the satellite communication network specifically includes:
the BSC module of the control station encrypts the BCCH channel using physical layer encryption.
And the BSC module of the control station sends the encrypted BCCH channel to the BTS module.
The BTS module of the control station transmits the encrypted BCCH channel.
Further, the control station broadcasts the encryption characteristics of the BCCH channel through the RDSS short message communication network, which specifically includes:
and the BSC module of the control station sends the encryption characteristics of the BCCH to the RDSS module of the control station.
And the RDSS module of the control station packs the encryption characteristics of the BCCH channel into an RDSS message.
And the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network.
Further, the analyzing, by the terminal, the content of the received BCCH channel specifically includes:
and the RDSS module of the terminal analyzes the encryption characteristics of the BCCH channel according to the received RDSS message.
And the RDSS module of the terminal sends the encryption characteristics of the BCCH to a modem module of the terminal.
And the modem module of the terminal analyzes the BCCH information received by the terminal according to the encryption characteristics of the BCCH.
Further, the terminal submits network access application data to a control station through the Beidou third RDSS short message communication network, and the method specifically comprises the following steps:
and the modem module of the terminal sends the network access application data to the RDSS module of the terminal.
And the RDSS module of the terminal packs the network access application data and the content of the traditional RACH channel into an RDSS message.
And the RDSS module of the terminal sends the RDSS message to the RDSS module of the control station through the Beidou third RDSS short message communication network.
And the RDSS module of the control station sends the RDSS message to the BSC module of the control station.
Preferably, the network access application of the terminal and the spectrum sensing parameters obtained by the spectrum sensing module of the terminal.
Further, the broadcasting of the planned satellite communication network parameters by the control station through the beidou No. three RDSS short message communication network specifically includes:
and the BSC module of the control station analyzes the network access application data of the terminal according to the received RDSS message.
And the BSC module of the control station actively avoids the interference frequency band and the time slot and allocates SDCCH channel parameters for the terminal.
And the BSC module of the control station packs the SDCCH channel parameters into an AGCH channel.
And the BSC module of the control station sends the AGCH channel to the RDSS module of the control station.
And the RDSS module of the control station packs the AGCH channels into RDSS messages.
And the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network.
And the RDSS module of the terminal analyzes the SDCCH channel parameters.
And the RDSS module of the terminal sends the SDCCH channel parameters to a modem module of the terminal.
According to another aspect of the invention, the satellite communication network control station comprises a BSC module and a BTS module, wherein the BSC module is connected with the BTS module, and the RDSS module is connected with the BSC module.
The BSC module is used for encrypting the BCCH by using a physical layer encryption method and sending the BCCH to the BTS module, sending the encryption characteristics of the BCCH to the RDSS module, receiving terminal network access application data sent by the RDSS module, planning satellite communication network parameters according to the terminal network access application data and sending the satellite communication network parameters to the RDSS module.
And the BTS module is used for transmitting the encrypted BCCH channel.
The RDSS module is used for establishing a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) sent by the BSC module and broadcasting the encryption characteristics through the Beidou third RDSS short message communication network, and the receiving terminal receives network access application data sent by the Beidou third RDSS short message communication network and sends the network access application data to the BSC module, receives planned satellite communication network parameters sent by the BSC module and broadcasts the network access application data through the Beidou third RDSS short message communication network.
According to still another aspect of the present invention, there is also provided a satellite communication network terminal, including a modem module and a spectrum sensing module, the modem module being connected to the satellite communication network, and further including an RDSS module, the RDSS module being connected to the modem module and the spectrum sensing module.
The modem module is used for receiving the encrypted BCCH information, receiving the encrypted characteristics of the BCCH information sent by the RDSS module, analyzing the BCCH information, sending an access application to the RDSS module, receiving SDCCH channel parameters sent by the RDSS module, and accessing the satellite communication network according to the SDCCH channel parameters.
The spectrum sensing module is used for sensing the spectrum of the satellite communication network frequency band, intelligently identifying the interference type and the parameter type, acquiring the spectrum sensing parameter and sending the spectrum sensing parameter to the RDSS module.
The RDSS module is used for building a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) broadcasted by the control station through the Beidou third RDSS short message communication network and sending the encryption characteristics to the modem module, receiving network access application sent by the modem module and spectrum sensing parameters sent by the spectrum sensing module and sending the network access application and the spectrum sensing parameters to the control station through the Beidou third RDSS short message communication network, and receiving SDCCH (broadcast control channel) parameters broadcasted by the control station through the Beidou third RDSS short message communication network and sending the SDCCH parameters to the modem module.
The invention has the beneficial effects that the Beidou third-number auxiliary satellite communication network access method, the control station and the terminal are provided, the dynamic encryption of a BCCH (broadcast control channel) is realized by utilizing a spread spectrum encryption channel of the Beidou third-number RDSS, the intelligent resource planning and high concurrency network access which support dynamic spectrum sensing reporting are realized by utilizing the large-capacity characteristic that the Beidou third-number RDSS single-packet data supports 14K-bit information and the advantage that the collision probability after spread spectrum is far lower than that of the traditional A L OHA (OHA) mode, and the functions of a high-safety AGCH channel and a SDCCH channel based on RDSS spread spectrum and encryption are respectively realized by utilizing the intra-group broadcasting and point-to-point communication of the RDSS group.
Drawings
Fig. 1 is a schematic flow chart of a satellite communication network access method based on beidou No. three assistance in accordance with a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a Beidou No. three RDSS short message communication network of a Beidou No. three auxiliary satellite communication network access method according to a first embodiment of the invention;
fig. 3 is a timing diagram of a satellite communication network access method based on the beidou No. three assistance according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a satellite communication network control station according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a satellite communication network terminal according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention discloses a Beidou third-auxiliary-based satellite communication network access method, a satellite communication network control station and a terminal, wherein a spectrum spreading encryption channel of a Beidou third-RDSS is used for realizing dynamic encryption of a BCCH (broadcast control channel), the large-capacity characteristic that the Beidou third-RDSS single-packet data supports 14K-bit information and the advantage that the collision probability after spectrum spreading is far lower than that of a traditional A L OHA (overhead high access network) mode are used for realizing intelligent resource planning and high concurrency network access supporting dynamic spectrum sensing reporting, and the functions of a high-security AGCH (early warning channel) and a SDCCH (broadcast dedicated channel) based on RDSS spectrum spreading and encryption are respectively realized by utilizing intra-group broadcasting and point-to-point communication of an RDSS group.
Example one
A Beidou III assisted satellite communication network access method is shown in the attached figure 1 and comprises the following steps:
and step S1, the control station and the terminal establish a Beidou third RDSS short message communication network.
The satellite communication network access method is realized based on the assistance of the Beidou No. three, utilizes the Beidou No. three short message communication system, exerts the advantages of high capacity, interference resistance, safety and feasibility of the short message system, and is combined with the low-frequency network access interactive communication of satellite communication.
Fig. 2 is a schematic diagram of a structure of a big dipper three-number RDSS short message communication network, the big dipper three-number uses three geosynchronous orbit satellites (GEO) to provide short message communication service for china and surrounding areas, the big dipper three-number communication network uses a double-hop communication mechanism, signals use an encryption spread spectrum communication mechanism with a 4.08M code rate to support marshalling communication based on command users, a communication flow between a typical command station 1 and a terminal 2 is that the command station 1 transmits signals to the big dipper three-number satellite 3, the big dipper three-number satellite 3 forwards the signals to a big dipper three-number RDSS central station 4, the RDSS central station 4 finishes capturing and demodulating the messages, marshalling the information to outbound signals and transmits the outbound signals to the big dipper three-number satellite 3, the big dipper three-number satellite 3 broadcasts the outbound signal method, the terminal 2 demodulates the outbound signals, thereby obtaining the messages sent by the command station 1, the big dipper three-number communication flow uses a spread spectrum encryption mechanism, the safety and the reliability are higher than those of the existing geosynchronous orbit mobile radio interface standard (GMR-1), the big dipper three-number RDSS communication network can support multiple carrier communication supporting multiple-number ohss communication for processing, the big dipper three-number RDSS communication supporting multiple carrier communication service supporting the big dipper three-number communication service supporting device supporting the big dipper three-number communication when the big dipper three-number communication supporting multiple carrier communication service supporting the big communication service supporting user is L/14, and.
In this embodiment, the control station includes a BSC module and a BTS module connected to the BSC module, and further includes an RDSS module (Radio determination site-lite system), which is connected to the BSC module and can transmit and receive information to and from the BSC module through the RDSS module. The terminal comprises a modem module, a spectrum sensing module and an RDSS module, and can send and receive information to the modem module through the RDSS module.
Specifically, in step S1, the RDSS module of the control station is connected to the RDSS module of the terminal, so as to construct the RDSS short message communication network of beidou No. three. In the established Beidou third RDSS short message communication network, the control station is configured as an RDSS group leader, and the terminal is configured as an RDSS group member.
In order to realize the corresponding relation between the control station and the terminal in the satellite communication network and the Beidou third RDSS short message communication network, the satellite communication network addresses of the control station and the terminal and the Beidou third RDSS short message communication network address are pre-compiled. In this embodiment, the control station and the terminal have two sets of addresses of a satellite communication network address and a Beidou third RDSS short message communication network address, and the two sets of addresses of the same device have a one-to-one mapping relationship. In the Beidou third RDSS short message communication network, a control station is configured as an RDSS group leader, two sets of addresses of all terminals are stored in the control station, the terminals are configured as RDSS group members, and each terminal stores two sets of addresses of the terminal and two sets of addresses of the control station.
In step S2, the control station broadcasts the encrypted BCCH channel through the satellite communication network.
Specifically, in step S2, the BSC module of the control station encrypts the BCCH channel using a physical layer encryption method; the BSC module of the control station sends the encrypted BCCH channel to the BTS module; the BTS module of the control station transmits the encrypted BCCH channel.
In this step, the physical layer encryption method may include, but is not limited to, frequency hopping, time hopping, spreading, and combinations thereof, and in a preferred embodiment, the BCCH channel may employ frequency hopping encryption, varying with time in 1087 sub-carriers of GMR-1, thereby significantly improving the concealment and reliability of the system.
And step S3, the control station broadcasts the encryption characteristics of the BCCH channel through the Beidou third RDSS short message communication network.
In the step, the control station utilizes the RDSS module to carry out the group broadcasting on the encryption characteristics of the BCCH by utilizing the Beidou third RDSS short message communication network, and because the communication in the Beidou third RDSS short message communication network adopts spread spectrum encryption communication, the safety of the transmission of the encryption characteristics of the BCCH can be well ensured.
In this embodiment, step S3 specifically includes the following steps:
and the BSC module of the control station sends the encryption characteristics of the BCCH to the RDSS module of the control station.
And the RDSS module of the control station packs the encryption characteristics of the BCCH channel into an RDSS message.
And the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network.
In a preferred embodiment, the BCCH channel is encrypted by a frequency hopping encryption method, and in this step S3, the BSC module of the control station sends the frequency hopping pattern parameters of the BCCH channel to the RDSS module, and the RDSS module packs the frequency hopping pattern parameters into an RDSS packet and sends the RDSS packet to the RDSS module of the terminal through the beidou No. three RDSS short message communication network.
In step S4, the terminal parses the content of the received BCCH channel.
And the terminal decrypts and receives the BCCH according to the received encryption characteristics of the BCCH and analyzes the BCCH information.
In this embodiment, step S4 specifically includes the following steps:
the RDSS module of the terminal analyzes the encryption characteristics of the BCCH channel according to the received RDSS message; the RDSS module of the terminal sends the encryption characteristics of the BCCH to a modem module of the terminal; and the modem module of the terminal analyzes the BCCH information received by the terminal according to the encryption characteristics of the BCCH.
And step S5, the terminal submits networking application data to the control station through the Beidou third RDSS short message communication network.
In this embodiment, the network access application data of the terminal includes a network access application of the terminal and spectrum sensing parameters obtained by a spectrum sensing module of the terminal, and the network access application includes field contents of a conventional RACH channel, including but not limited to a network access type, a geographic location, a random identification code, and the like; the spectrum sensing parameters comprise intelligently identified interference types and parameter types, wherein the interference types comprise but are not limited to narrowband interference, impulse interference and the like, and the parameter types comprise but are not limited to bandwidth, power, repetition period, duty ratio and the like. The spectrum sensing module equipped by the terminal can be special hardware such as a frequency spectrograph and a signal analyzer, or general hardware and software for realizing equivalent functions based on a software radio mode, the spectrum sensing module can intelligently identify and extract the interference state in a satellite communication network frequency band, the terminal network access application and the spectrum sensing are packaged together with the traditional RACH channel information, and the interference state is sent to the control station through the RDSS module of the terminal through the big Dipper three RDSS short message communication network. The packaged field content includes, but is not limited to, time, ID number, longitude, latitude, elevation, communication rate, modulation mode, error correction coding rate, random identification code, interference amount, type/kilometer/bandwidth/repetition parameter of each interference, etc., and the total information capacity of the message does not exceed 14 kbits.
In this embodiment, step S5 specifically includes the following steps:
the modem module of the terminal sends the network access application data to the RDSS module of the terminal; the RDSS module of the terminal packs the network access application data and the content of the traditional RACH channel into an RDSS message; the RDSS module of the terminal sends the RDSS message to an RDSS module of a control station through a Beidou third RDSS short message communication network; and the RDSS module of the control station sends the RDSS message to the BSC module of the control station.
And step S6, the control station broadcasts the planned satellite communication network parameters through the Beidou third RDSS short message communication network.
In this embodiment, the BSC module of the control station plans satellite communication network parameters according to the received network access application data, actively evades interference frequency bands and time slots, allocates SDCCH channel parameters to the terminal, and broadcasts the planned satellite communication network parameters through the beidou No. three RDSS short message communication network.
In this embodiment, step S6 specifically includes the following steps:
the BSC module of the control station analyzes the network access application data of the terminal according to the received RDSS message; a BSC module of the control station actively avoids interference frequency bands and time slots, and allocates SDCCH channel parameters for the terminal; the BSC module of the control station packs the SDCCH channel parameters into an AGCH channel; the BSC module of the control station sends the AGCH channel to the RDSS module of the control station; the RDSS module of the control station packs the AGCH channel into an RDSS message; the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network; the RDSS module of the terminal analyzes SDCCH channel parameters; and the RDSS module of the terminal sends the SDCCH channel parameters to a modem module of the terminal.
In a preferred embodiment, the RDSS module of the director can use different broadcast modes for broadcasting the planned satellite communication network parameters through the beidou three RDSS short message communication network, when the satellite communication network parameters of a plurality of terminals exist, the RDSS module of the director adopts an RDSS group multicast function for broadcasting, and for the special network parameters of each terminal, the RDSS module of the director adopts an RDSS group point-to-point broadcasting.
And step S7, the terminal accesses the satellite communication network according to the received satellite communication network parameters.
In this embodiment, the modem module of the terminal switches to a normal network access process according to the received SDCCH channel parameter, and guides the terminal to switch to the SDCCH channel, thereby completing the access of the terminal to the satellite communication network and entering service communication.
The method and the device realize dynamic encryption of the BCCH channel by using the spread spectrum encryption channel of the Beidou third RDSS, realize intelligent resource planning and high concurrency access network supporting dynamic spectrum sensing reporting by using the large-capacity characteristic that the single packet data of the Beidou third RDSS supports 14K bit information and the advantage that the collision probability after spread spectrum is far lower than that of the traditional A L OHA mode, and respectively realize high-security AGCH channel and SDCCH channel functions based on RDSS spread spectrum and encryption by using the intra-group broadcast and point-to-point communication of the RDSS group.
Example two
A Beidou third auxiliary satellite communication network access method is disclosed, and a time sequence diagram of the method of the embodiment is shown in FIG. 3.
And an RDSS module of the control station is connected with an RDSS module of the terminal to form a Beidou third RDSS short message communication network, wherein the control station is configured as an RDSS group leader, and the terminal is configured as an RDSS group member.
The BSC module of the control station encrypts the BCCH channel by using a physical layer encryption method; the BSC module of the control station sends the encrypted BCCH channel to the BTS module; the BTS module of the control station transmits the encrypted BCCH channel.
The BSC module of the control station sends the encryption characteristics of the BCCH to the RDSS module of the control station; the RDSS module of the control station packs the encryption characteristics of the BCCH channel into an RDSS message; and the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network.
The RDSS module of the terminal analyzes the encryption characteristics of the BCCH channel according to the received RDSS message; the RDSS module of the terminal sends the encryption characteristics of the BCCH to a modem module of the terminal; and the modem module of the terminal analyzes the BCCH information received by the terminal according to the encryption characteristics of the BCCH.
The terminal comprises a modem module, an RDSS module and a spectrum sensing module, wherein the modem module of the terminal sends network access application data to the RDSS module of the terminal, and the network access application data comprise network access applications of the terminal and spectrum sensing parameters acquired by the spectrum sensing module of the terminal; the RDSS module of the terminal packs the network access application data and the content of the traditional RACH channel into an RDSS message; the RDSS module of the terminal sends the RDSS message to an RDSS module of a control station through a Beidou third RDSS short message communication network; and the RDSS module of the control station sends the RDSS message to the BSC module of the control station.
The BSC module of the control station analyzes the network access application data of the terminal according to the received RDSS message; a BSC module of the control station actively avoids interference frequency bands and time slots, and allocates SDCCH channel parameters for the terminal; the BSC module of the control station packs the SDCCH channel parameters into an AGCH channel; the BSC module of the control station sends the AGCH channel to the RDSS module of the control station; the RDSS module of the control station packs the AGCH channel into an RDSS message; the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network; the RDSS module of the terminal analyzes SDCCH channel parameters; and the RDSS module of the terminal sends the SDCCH channel parameters to a modem module of the terminal.
And a modem module of the terminal switches to a normal network access process according to the received SDCCH channel parameters, guides to switch to the SDCCH channel, and finishes the access of the terminal to a satellite communication network and enters service communication.
EXAMPLE III
In order to implement the beidou three-number assisted satellite communication network access method of the present invention, the present embodiment discloses a satellite communication network control station, and the structure of the satellite communication network control station is shown in fig. 4.
In this embodiment, the control station 1 includes a BSC module 101 and a BTS module 102, the BSC module 101 is connected to the BTS module 102, the control station 1 further includes an RDSS module 103 connected to the BSC module 101, and the connection interface is a network port, a serial port, a USB, or another bidirectional bus communication interface.
In the control station 1 of the present embodiment, the uses of the RDSS module 103 include: the method comprises the steps of establishing a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) sent by a BSC module 101 and broadcasting the encryption characteristics through the Beidou third RDSS short message communication network, sending network access application data sent by a receiving terminal through the Beidou third RDSS short message communication network to the BSC module 101, receiving planned satellite communication network parameters sent by the BSC module 101 and broadcasting the planned satellite communication network parameters through the Beidou third RDSS short message communication network.
In the control station 1 of this embodiment, the BSC module 101 and the BTS module 102 are both conventional modules in the prior art, and detailed descriptions thereof are omitted. The purpose of the BSC module 101 includes: the method comprises the steps of encrypting a BCCH channel by using a physical layer encryption method and sending the BCCH channel to a BTS module 102, sending the encryption characteristics of the BCCH channel to an RDSS module 103, receiving terminal network access application data sent by the RDSS module 103, planning satellite communication network parameters according to the terminal network access application data and sending the satellite communication network parameters to the RDSS module 103. The uses of the BTS module 102 of the control station 1 include: and transmitting the encrypted BCCH channel.
Example four
In order to implement the beidou three-number assisted satellite communication network access method of the present invention, the present embodiment discloses a satellite communication network terminal, and the structure of the satellite communication network terminal is shown in fig. 5.
In this embodiment, the terminal 2 includes a modem module 201 and a spectrum sensing module 202, the modem module 201 is connected to the satellite communication network, the terminal 2 further includes an RDSS module 203, the RDSS module 203 is connected to the modem module 201 and the spectrum sensing module 202, and the connection interface is a network port, a serial port, a USB or other bidirectional bus communication interface.
In the terminal 2 of this embodiment, the use of the RDSS module 203 includes: the method comprises the steps of establishing a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) broadcasted by a control station through the Beidou third RDSS short message communication network and sending the encryption characteristics to a modem module 201, receiving a network access application sent by the modem module 201 and spectrum sensing parameters sent by a spectrum sensing module 202 and sending the network access application and the spectrum sensing parameters to the control station through the Beidou third RDSS short message communication network, and receiving SDCCH (broadcast control channel) parameters broadcasted by the control station through the Beidou third RDSS short message communication network and sending the SDCCH parameters to the modem module 201.
In the terminal 2 of this embodiment, the modem module 201 and the spectrum sensing module 202 are both conventional modules in the prior art, and detailed descriptions thereof are omitted. The purpose of the modem module 201 includes: receiving the encrypted BCCH channel message, receiving the encrypted characteristics of the BCCH channel sent by the RDSS module 203, analyzing the BCCH channel message, sending a network access application to the RDSS module 203, receiving the SDCCH channel parameters sent by the RDSS module 203, and accessing the satellite communication network according to the SDCCH channel parameters. The usage of the spectrum sensing module 202 of the terminal 2 includes: and (3) performing spectrum sensing of the satellite communication network frequency band, intelligently identifying the interference type and the parameter type, acquiring spectrum sensing parameters and sending the spectrum sensing parameters to the RDSS module 203.
In summary, the invention provides a Beidou third-order auxiliary satellite communication network access method, a control station and a terminal, dynamic encryption of a BCCH (broadcast control channel) is realized by using a spread spectrum encryption channel of a Beidou third-order RDSS (radio data system), intelligent resource planning and high concurrency access network supporting dynamic spectrum sensing reporting are realized by using the characteristic that single-packet data of the Beidou third-order RDSS supports the large capacity of 14K bit information and the advantage that the collision probability after spread spectrum is far lower than that of a traditional A L OHA (OHA) mode, and high-safety AGCH (enhanced resource access control channel) and SDCCH (broadcast distributed peer-to-peer) functions based on RDSS spread spectrum and encryption are respectively realized by using intra-group broadcast peer-to-peer communication of an RDSS group.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.

Claims (10)

1. A Beidou third-assisted satellite communication network access method is characterized by comprising the following steps:
s1, the control station and the terminal establish a Beidou third RDSS short message communication network;
s2, the control station broadcasts the encrypted BCCH channel through the satellite communication network;
s3, the control station broadcasts the encryption characteristics of the BCCH channel through the Beidou third RDSS short message communication network;
s4, the terminal analyzes the content of the BCCH channel;
s5, the terminal submits networking application data to the control station through the Beidou third RDSS short message communication network;
s6, the control station broadcasts the planned satellite communication network parameters through the Beidou third RDSS short message communication network;
and S7, the terminal accesses the satellite communication network according to the received satellite communication network parameters.
2. The beidou No. three auxiliary satellite communication network access method of claim 1, wherein the control station and the terminal establish a beidou No. three RDSS short message communication network, specifically comprising:
the RDSS module of the control station is connected with the RDSS module of the terminal to establish a Beidou third RDSS short message communication network;
the control station is configured as an RDSS group leader, and the terminal is configured as an RDSS group member.
3. The beidou three-number-assisted satellite communication network access method of claim 1, wherein the control station broadcasts the encrypted BCCH channel through the satellite communication network, specifically comprising:
the BSC module of the control station encrypts the BCCH channel by using a physical layer encryption method;
the BSC module of the control station sends the encrypted BCCH channel to the BTS module;
the BTS module of the control station transmits the encrypted BCCH channel.
4. The beidou No. three auxiliary satellite communication network access method of claim 1, wherein the control station broadcasts the encryption characteristics of the BCCH channel through the beidou No. three RDSS short message communication network, which specifically comprises:
the BSC module of the control station sends the encryption characteristics of the BCCH to the RDSS module of the control station;
the RDSS module of the control station packs the encryption characteristics of the BCCH channel into an RDSS message;
and the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network.
5. The beidou three-number-assisted satellite communication network access method of claim 4, wherein the analyzing, by the terminal, the content of the received BCCH channel specifically comprises:
the RDSS module of the terminal analyzes the encryption characteristics of the BCCH channel according to the received RDSS message;
the RDSS module of the terminal sends the encryption characteristics of the BCCH to a modem module of the terminal;
and the modem module of the terminal analyzes the BCCH information received by the terminal according to the encryption characteristics of the BCCH.
6. The beidou No. three auxiliary satellite communication network access method of claim 1, wherein the terminal submits network access application data to a control station through the beidou No. three RDSS short message communication network, specifically comprising:
the modem module of the terminal sends the network access application data to the RDSS module of the terminal;
the RDSS module of the terminal packs the network access application data and the content of the traditional RACH channel into an RDSS message;
the RDSS module of the terminal sends the RDSS message to an RDSS module of a control station through a Beidou third RDSS short message communication network;
and the RDSS module of the control station sends the RDSS message to the BSC module of the control station.
7. The Beidou I-assisted satellite communication network access method of claim 6, wherein the network access application data comprises:
the network access application of the terminal and the spectrum sensing parameters obtained by the spectrum sensing module of the terminal.
8. The beidou No. three auxiliary satellite communication network access method of claim 7, wherein the control station broadcasts the planned satellite communication network parameters through the beidou No. three RDSS short message communication network, specifically comprising:
the BSC module of the control station analyzes the network access application data of the terminal according to the received RDSS message;
a BSC module of the control station actively avoids interference frequency bands and time slots, and allocates SDCCH channel parameters for the terminal;
the BSC module of the control station packs the SDCCH channel parameters into an AGCH channel;
the BSC module of the control station sends the AGCH channel to the RDSS module of the control station;
the RDSS module of the control station packs the AGCH channel into an RDSS message;
the RDSS module of the control station sends the RDSS message to the RDSS module of the terminal through the Beidou third RDSS short message communication network;
the RDSS module of the terminal analyzes SDCCH channel parameters;
and the RDSS module of the terminal sends the SDCCH channel parameters to a modem module of the terminal.
9. A satellite communication network control station comprises a BSC module and a BTS module, wherein the BSC module is connected with the BTS module,
the RDSS module is connected with the BSC module;
the BSC module is used for encrypting the BCCH by using a physical layer encryption method and sending the BCCH to the BTS module, sending the encryption characteristics of the BCCH to the RDSS module, receiving terminal network access application data sent by the RDSS module, planning satellite communication network parameters according to the terminal network access application data and sending the satellite communication network parameters to the RDSS module;
the BTS module is used for transmitting the encrypted BCCH channel;
the RDSS module is used for establishing a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) sent by the BSC module and broadcasting the encryption characteristics through the Beidou third RDSS short message communication network, and the receiving terminal receives network access application data sent by the Beidou third RDSS short message communication network and sends the network access application data to the BSC module, receives planned satellite communication network parameters sent by the BSC module and broadcasts the network access application data through the Beidou third RDSS short message communication network.
10. A satellite communication network terminal comprising a modem module and a spectrum sensing module, said modem module being connected to said satellite communication network,
the RDSS module is connected with the modem module and the spectrum sensing module;
the modem module is used for receiving the encrypted BCCH information, receiving the encrypted characteristics of the BCCH information sent by the RDSS module, analyzing the BCCH information, sending an access application to the RDSS module, receiving SDCCH channel parameters sent by the RDSS module, and accessing the satellite communication network according to the SDCCH channel parameters;
the frequency spectrum sensing module is used for sensing the frequency spectrum of the satellite communication network frequency band, intelligently identifying the interference type and the parameter type, acquiring the frequency spectrum sensing parameter and sending the frequency spectrum sensing parameter to the RDSS module;
the RDSS module is used for building a Beidou third RDSS short message communication network, receiving encryption characteristics of a BCCH (broadcast control channel) broadcasted by the control station through the Beidou third RDSS short message communication network and sending the encryption characteristics to the modem module, receiving network access application sent by the modem module and spectrum sensing parameters sent by the spectrum sensing module and sending the network access application and the spectrum sensing parameters to the control station through the Beidou third RDSS short message communication network, and receiving SDCCH (broadcast control channel) parameters broadcasted by the control station through the Beidou third RDSS short message communication network and sending the SDCCH parameters to the modem module.
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