CN115665885A - Satellite communication method, ground station and satellite - Google Patents
Satellite communication method, ground station and satellite Download PDFInfo
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- CN115665885A CN115665885A CN202211239419.3A CN202211239419A CN115665885A CN 115665885 A CN115665885 A CN 115665885A CN 202211239419 A CN202211239419 A CN 202211239419A CN 115665885 A CN115665885 A CN 115665885A
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Abstract
The application provides a satellite communication method, a ground station and a satellite, wherein the method is applied to the satellite and specifically comprises the steps of establishing a wireless bearer channel with a satellite terminal after receiving an initial context establishment request message of a ground station system; sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein, the ground data link layer is deployed at the ground station; and carrying out user plane data interaction with the ground station system through a ground data link layer configured with a radio bearer channel. The scheme utilizes the ground data link layer deployed on the ground station to carry out user plane data interaction, so that the capability of processing the user plane data is transferred to the high-performance processor on the ground station to bear, the processing efficiency of the user plane data is improved, and the problems of data loss and delay in satellite communication are solved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a satellite communication method, a ground station and a satellite.
Background
Satellite communication is a common communication method. In the existing satellite communication technology, after completing the beam activation, the satellite performs signaling interaction with the satellite terminal and the ground station, so as to establish a communication service between the satellite terminal and the satellite-ground station, and after completing the establishment of the communication service, the satellite terminal performs user plane data interaction with a land terminal at the rear end of the ground station through the satellite and the ground station.
The existing satellite is deployed with a data link layer and a network layer, user plane data (including uplink user plane data and downlink user plane data) reaching the satellite in the communication process needs to be processed (such as message packetization, packet combining, scheduling and the like) by the data link layer and then transferred to a satellite terminal or a ground station, and the processing capacity of the data link layer of the satellite is mainly borne by a central processing unit (namely a CPU) on the satellite.
Due to the limitation of the performance of a CPU of the satellite, the efficiency of processing user plane data by a data link layer of the satellite is low, so that the problems of easy data loss, large delay and the like exist in the existing satellite communication.
Disclosure of Invention
In view of the above shortcomings in the prior art, the present invention provides a method for satellite communication, a ground station and a satellite, so as to improve the problems of data loss and delay in satellite communication.
A first aspect of the present application provides a method for satellite communication, which is applied to a satellite, and the method includes:
after receiving an initial context establishment request message of a ground station system, establishing a radio bearer channel with a satellite terminal;
sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
and carrying out user plane data interaction with the ground station system through a ground data link layer configured with the radio bearer channel.
Optionally, the performing, by the ground data link layer configured with the radio bearer channel, user plane data interaction with the ground station system includes:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to the ground station system through a ground data link layer configured with the radio bearer channel;
and receiving downlink user plane data sent by the ground station system through the ground data link layer, and sending the downlink user plane data to the satellite terminal.
A second aspect of the present application provides a method for satellite communication, which is applied to a ground station, and the method includes:
sending an initial context establishment request message to the satellite;
receiving a radio bearer configuration request message sent by the satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
and carrying out user plane data interaction with the satellite through a ground data link layer configured with the radio bearer channel.
Optionally, the performing, by the ground data link layer configured with the radio bearer channel, user plane data interaction with the satellite includes:
receiving downlink user plane data of a core network, and sending the downlink user plane data to the satellite through a ground data link layer configured with the wireless bearer channel;
and receiving uplink user plane data sent by the satellite through the ground data link layer, and forwarding the uplink user plane data to a core network.
A third aspect of the present application provides a satellite comprising a network layer and a physical layer;
the network layer is to:
after receiving an initial context establishment request message of a ground station system, establishing a radio bearer channel with a satellite terminal;
sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
the physical layer is to:
and carrying out user plane data interaction with the ground station system through a ground data link layer configured with the radio bearer channel.
Optionally, when the physical layer performs user plane data interaction with the ground station system through the ground data link layer configured with the radio bearer channel, the physical layer is specifically configured to:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to the ground station system through a ground data link layer configured with the radio bearer channel;
and receiving downlink user plane data sent by the ground station system through the ground data link layer, and sending the downlink user plane data to the satellite terminal.
A fourth aspect of the present application provides a ground station comprising a ground station system and a ground data link layer;
the ground station system is to:
sending an initial context establishment request message to the satellite;
the terrestrial data link layer is to:
receiving a radio bearer configuration request message sent by the satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
the ground station system is to:
and carrying out user plane data interaction with the satellite through a ground data link layer configured with the radio bearer channel.
Optionally, when the ground station system performs user plane data interaction with the satellite through the ground data link layer configured with the radio bearer channel, the ground station system is specifically configured to:
receiving downlink user plane data of a core network, and sending the downlink user plane data to the satellite through a ground data link layer configured with the wireless bearer channel;
and receiving uplink user plane data sent by the satellite through the ground data link layer, and forwarding the uplink user plane data to a core network.
The application provides a satellite communication method, a ground station and a satellite, wherein the method is applied to the satellite and specifically comprises the steps of receiving an initial context establishment request message of a ground station system, and establishing a radio bearer channel with a satellite terminal; sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein, the ground data link layer is deployed at the ground station; and carrying out user plane data interaction with the ground station system through a ground data link layer configured with a radio bearer channel. The scheme utilizes a ground data link layer deployed on the ground station to carry out user plane data interaction, so that the capability of processing the user plane data is transferred to a high-performance processor on the ground station, the processing efficiency of the user plane data is improved, and the problems of data loss and delay in satellite communication are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a satellite communication system according to an embodiment of the present application;
fig. 2 is a flowchart of a satellite communication method according to an embodiment of the present disclosure;
fig. 3 is a flowchart of another satellite communication method according to an embodiment of the present disclosure;
fig. 4 is a schematic data flow diagram of a satellite communication system according to an embodiment of the present disclosure;
fig. 5 is a schematic information interaction diagram of a satellite communication method according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an architecture of a satellite according to an embodiment of the present application;
fig. 7 is a schematic architecture diagram of a ground station according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to facilitate understanding of the technical solution of the present application, a brief description is first given of a constituent structure of a satellite communication system and an operating principle thereof.
Fig. 1 is a schematic structural diagram of a satellite communication system according to an embodiment of the present disclosure. The satellite communication system comprises a satellite terminal, a satellite, a gateway station, a ground station, a core network and a land terminal.
The satellite terminal refers to a mobile communication terminal with satellite communication capability, and the land terminal refers to a mobile communication terminal without satellite communication capability.
After the satellite terminal initiates a communication request, the satellite terminal, the satellite and the ground station perform signaling interaction, so that communication service connection is established between the satellite terminal and the land terminal.
The satellite terminal may then send uplink user plane data (e.g., uplink voice data) to the satellite, which forwards the uplink user plane data to the gateway station, where the uplink user plane data is transmitted to the land terminal in sequence, i.e., in the order of the gateway station, the ground station, the core network, and the land terminal. Meanwhile, the terrestrial terminal sends downlink user plane data (such as downlink voice data) to the core network through the ground base station, the downlink user plane data are transmitted to the satellite one by one according to the mode of the core network, the ground station, the gateway station and the satellite, and then the satellite forwards the downlink user plane data to the satellite terminal. Therefore, the interaction of user plane data can be realized between the satellite terminal and the land terminal, and the communication is completed.
The above communication process has problems that the satellite obtains user plane data (including uplink user plane data and downlink user plane data), a data link layer (also referred to as an L2 subsystem) deployed on the satellite needs to process the user plane data, such as performing packetization, packetization and scheduling of the user plane data, and the L2 subsystem is deployed on a central processing unit (i.e., CPU) of the satellite.
The processing capability of the CPU on the satellite is very poor due to the limitation of the hardware resources of the satellite, so the efficiency of processing the user plane data by the data link layer deployed on the CPU of the satellite is very low, which causes the problem that the user plane data sent to the satellite by the satellite terminal or the ground station cannot be processed by the data link layer of the satellite in time, and data loss or delay is easily caused.
In view of the above problem, the present invention provides a satellite communication method, please refer to fig. 2, which is a flowchart of the method, and the method may include the following steps. The method may be applied to a satellite, i.e. the steps of the method may be performed by the satellite shown in fig. 1.
S201, after receiving the initial context establishment request message of the ground station system, establishing a radio bearer channel with the satellite terminal.
After the satellite terminal sends a ball communication request, the satellite firstly carries out signaling interaction with the satellite terminal to establish wireless resource control. By establishing radio resource control, the satellite allocates certain radio resources to the satellite terminal for subsequent radio communication between the satellite and the satellite terminal.
The radio resource allocated by the satellite at this time may be a dedicated control channel resource or a traffic resource.
After the radio resource control is established, the satellite sends an initial UE message to the ground station system. The UE is Chinese user equipment which is an abbreviation of user equipment.
The ground station system transmits the initial UE message to the core network, the core network determines that new user equipment needs to communicate currently according to the initial UE message, then the core network establishes a corresponding default bearer channel and sends an initial context establishment request message to the ground station system, and the ground station system transmits the initial context establishment request message to the satellite.
After receiving the initial context establishment request message, the satellite performs signaling interaction with the satellite terminal, so as to establish a radio bearer channel between the satellite and the satellite terminal based on the previously allocated radio resource.
Specifically, when the radio bearer channel is established, the satellite may send a radio bearer channel establishment request message to the satellite terminal through a dedicated control channel allocated when the radio resource control is established, the satellite terminal feeds back a radio bearer channel establishment completion message to the satellite after receiving and performing corresponding processing, and the satellite indicates that the radio bearer channel is successfully established when receiving the radio bearer channel establishment completion message.
S202, sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of the ground data link layer.
Wherein the ground data link layer is deployed at a ground station. The specific ground data link layer is deployed on a high-performance CPU of the ground station, that is, both the data processing function and the data forwarding function of the ground data link layer are borne by the high-performance CPU of the ground station.
In step S202, the satellite may specifically send a radio bearer configuration request message to a ground data link layer (which may be referred to as ground L2) deployed at the ground station, where the radio bearer configuration request message may carry related information of the radio bearer channel established in step S201. After receiving the radio bearer configuration request message, the ground L2 may configure the related information of the carried radio bearer channel locally, and after the configuration is completed, feed back a radio bearer configuration response message to the satellite, so that the satellite completes the configuration of the radio bearer channel of the ground L2.
S203, the user plane data interaction is carried out with the ground station system through the ground data link layer configured with the radio bearer channel.
Optionally, the performing user plane data interaction with the ground station system through the ground data link layer configured with the radio bearer channel includes:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to a ground station system through a ground data link layer configured with a wireless bearer channel;
and receiving downlink user plane data sent by the ground station system through a ground data link layer, and sending the downlink user plane data to the satellite terminal.
Specifically, in the process of uplink user plane data transmission, the satellite terminal sends uplink user plane data to a physical layer of the satellite, the physical layer of the satellite sends the uplink user plane data to a ground L2 of the ground station through the gateway station, and the ground L2 processes the uplink user plane data and sends the uplink user plane data to the core network, and the uplink user plane data is forwarded to the land terminal through the core network.
In the process of downlink user plane data transmission, the land terminal sends downlink user plane data to the core network, the downlink user plane data is forwarded to the ground L2 of the ground station through the core network, the ground L2 forwards the downlink user plane data to the physical layer of the satellite through the gateway station after processing the downlink user plane data, and the physical layer of the satellite forwards the downlink user plane data to the satellite terminal.
The embodiment of the present application further provides a method for satellite communication, which is applied to a ground station, please refer to fig. 3, and the method may include the following steps.
S301, sending an initial context setup request message to the satellite.
As described above, the ground station system may transmit the initial context setup request message to the satellite after receiving the initial UE message of the satellite.
S302, receiving a radio bearer configuration request message sent by the satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer.
The ground data link layer is deployed at a ground station;
and S303, carrying out user plane data interaction with the satellite through a ground data link layer configured with a radio bearer channel.
Optionally, the user plane data interaction with the satellite through the ground data link layer configured with the radio bearer channel includes:
receiving downlink user plane data of a core network, and sending the downlink user plane data to a satellite through a ground data link layer configured with a radio bearer channel;
and receiving uplink user plane data sent by the satellite through a ground data link layer, and forwarding the uplink user plane data to a core network.
The specific implementation of steps S302 and S303 is the same as steps S202 and S203 in the embodiment shown in fig. 2, and will not be described again.
For a further understanding of the present application, please refer to fig. 4, which is a schematic data flow diagram of a satellite communication system according to an embodiment of the present application.
As shown in fig. 4, in the method provided in the embodiment of the present application, and the satellite and the ground station for implementing the method, the control signaling sent to the physical layer of the satellite when establishing the communication service is forwarded to the network layer of the satellite (i.e., the L3 subsystem) for processing by the physical layer of the satellite, and then forwarded to the ground station system of the ground station by the network layer of the satellite, and further forwarded to the core network.
After the communication service is established, the user plane data sent to the satellite by the satellite terminal is directly forwarded to a ground L2 deployed on a ground station through a physical layer of the satellite, and is forwarded to a land terminal after being processed by the ground L2. Meanwhile, the user plane data sent to the ground station by the land terminal through the core network also reaches the ground L2, the ground L2 processes the user plane data and sends the user plane data to the physical layer of the satellite, and then the physical layer of the satellite directly sends the user plane data provided by the ground station to the satellite terminal.
The physical layer of the satellite is deployed on a Programmable logic Array (FPGA) of the satellite, and compared with a CPU, the FPGA has a single function, so that only a physical layer with a simple function can be deployed, but relatively, under the same condition, the performance of the FPGA is superior to that of the CPU, so that the physical layer deployed on the FPGA forwards user plane data, and the problem of data loss or delay caused by low forwarding efficiency is avoided.
The embodiment has the advantages that when the communication service is established, the satellite configures the radio bearer channel for the ground L2 deployed on the ground station, and after the communication service is established, the physical layer of the satellite can directly transmit the user plane data with the ground L2.
Compared with the CPU of the satellite, the CPU of the ground station has smaller hardware resource limit and better performance than the CPU of the satellite, so the ground L2 of the CPU of the ground station is used for processing the user plane data, the processing efficiency of the user plane data can be obviously improved, and the problem of data loss or data delay when the data link layer (namely the satellite L2) of the satellite processes the user plane data is avoided.
Furthermore, it can be seen from the above method that the method provided by the present application does not change the external interface of the satellite communication system, the satellite terminal can still communicate with the physical layer of the satellite according to the original interface, and the terrestrial terminal can still access the core network according to the original interface, so that there is no influence on the terminals participating in communication.
In addition, the load of processing the user plane data is transferred from the satellite to the ground station, so that the processing capacity of the existing high-performance server of the ground station can be effectively utilized, and the processing load of satellite hardware is greatly reduced. Therefore, the satellite and ground processing resources are balanced, and the processing capacity and quality of the satellite mobile communication service are guaranteed.
Please refer to fig. 5, which is a schematic diagram illustrating information interaction of a satellite communication method according to an embodiment of the present disclosure.
In fig. 5, the core network, the gateway station, and the terrestrial terminal are not shown for ease of understanding.
Beam activation is performed first by the data link layer (i.e., satellite L2) and the network layer (i.e., L3) of the satellite based on triggering of the higher level subsystems or ground stations of the satellite.
After the beam activation is successful, the satellite terminal sends a message S1, that is, a Radio Resource Control (RRC) establishment request, to the L3. And the L3 responds to the Radio resource control establishment request and configures user Signaling Radio Bearer (SRB) information for the L2 of the satellite.
The RRC setup request may be sent by the satellite terminal on an uplink common control Channel, RACH (Random Access Channel).
Specifically, the L3 sends a message S2 to the satellite L2, signals the radio bearer L2 configuration request, and the L2 performs corresponding processing after receiving the message S2, and then feeds back a signaling radio bearer L2 configuration response to the L3, thereby completing the configuration of the SRB information.
After the configuration of the SRB information is completed, the L3 sends a message S4, the physical resource configuration, and the message S4 may be carried on an Access Grant Channel (AGCH). And after receiving the S4, the satellite terminal feeds back a message S5 to the L3 of the satellite to establish wireless resource control, and after receiving the S5, the network layer feeds back a message S6 to the satellite terminal to complete the establishment of the wireless resource control. At this point, the process of establishing the radio resource control is completed between the satellite and the satellite terminal, and the satellite allocates the radio resource to the satellite terminal.
S5 and S6 are both carried on a Dedicated Access Control CHannel (DACCH).
After the radio resource control establishment process is completed, the L3 of the satellite sends a message S7 to the ground station system, a user terminal message is initiated, the ground station system transfers the message S7 to the core network, and then the core network sends a message S8 through the ground station system, and a context establishment request is initiated.
And after receiving the message S8, the L3 of the satellite sends a message S9 to the satellite terminal, the wireless bearing establishment request is sent, after receiving the message S9, the satellite terminal feeds back a message S10 to the L3 of the satellite, the wireless bearing establishment is completed, and therefore a wireless bearing channel is established between the satellite and the satellite terminal.
Then, the satellite performs radio bearer channel configuration on the ground L2. Specifically, the L3 of the satellite sends a message S11 to the ground L2, the L2 of the radio bearer requests configuration, and after receiving S11, the ground L2 performs corresponding configuration, and then feeds back a message S12 to the L3 of the satellite, and the L2 of the radio bearer configures a response, thereby completing the configuration of the L2 radio bearer channel.
After the radio bearer channel configuration is completed, the L3 of the satellite sends a message S13 to the ground station system, the initial context establishment is completed, and the ground station system forwards S13 to the core network. The satellite terminal and the terrestrial terminal can then communicate, i.e., interact with user plane data.
In the communication process, as shown in fig. 5, the satellite terminal and the physical layer transmit user plane data, the physical layer directly transmits user plane data with the ground L2, then the ground L2 transmits user plane data with the ground station system, and the ground station system transmits user plane data with the land terminal through the core network.
Therefore, the transmission of the user plane data is completely carried by the ground L, and the satellite L2 does not bear the function of the user plane data transmission any more, so that the problems of data loss and delay caused by low satellite L2 processing efficiency are avoided.
An embodiment of the present application provides a satellite, please refer to fig. 6, which is a schematic architecture diagram of the satellite, and the satellite includes a network layer and a physical layer, and may further include a data link layer deployed at the satellite.
As shown in fig. 6, the network layer and the data link layer are deployed on the CPU of the satellite, and the physical layer is deployed on the FPGA of the satellite.
The network layer is to:
after receiving an initial context establishment request message of a ground station system, establishing a radio bearer channel with a satellite terminal;
sending a radio bearer configuration request message to a ground station system, and receiving a radio bearer configuration response message fed back by the ground station system to complete configuration of a radio bearer channel of a ground data link layer; the ground data link layer is deployed at a ground station;
the physical layer is used for:
and carrying out user plane data interaction with a ground station system through a ground data link layer configured with a radio bearer channel.
Optionally, when the physical layer performs user plane data interaction with the ground station system through the ground data link layer configured with the radio bearer channel, the physical layer is specifically configured to:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to a ground station system through a ground data link layer configured with a wireless bearer channel;
and receiving downlink user plane data sent by the ground station system through the ground data link layer, and sending the downlink user plane data to the satellite terminal.
Fig. 7 is a schematic diagram of an architecture of a ground station, where the ground station includes a ground station system and a ground data link layer;
the ground station system is for:
sending an initial context establishment request message to the satellite;
the terrestrial data link layer is to:
receiving a radio bearer configuration request message sent by a satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer; the ground data link layer is deployed at a ground station;
the ground station system is for:
and carrying out user plane data interaction with the satellite through a ground data link layer configured with a radio bearer channel.
Optionally, when the ground station system performs user plane data interaction with the satellite through the ground data link layer configured with the radio bearer channel, the ground station system is specifically configured to:
receiving downlink user plane data of a core network, and sending the downlink user plane data to a satellite through a ground data link layer configured with a radio bearer channel;
and receiving uplink user plane data sent by the satellite through a ground data link layer, and forwarding the uplink user plane data to a core network.
For specific working principles of the satellite and the ground station provided in this embodiment, reference may be made to relevant steps in the satellite communication method provided in the foregoing embodiment, and details are not repeated.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence of the functions performed by the devices, modules or units.
Those skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for satellite communication, the method comprising:
after receiving an initial context establishment request message of a ground station system, establishing a radio bearer channel with a satellite terminal;
sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
and carrying out user plane data interaction with the ground station system through a ground data link layer configured with the radio bearer channel.
2. The method of claim 1, wherein the interacting with the ground station system through the ground data link layer configured with the radio bearer channel comprises:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to the ground station system through a ground data link layer configured with the wireless bearer channel;
and receiving downlink user plane data sent by the ground station system through the ground data link layer, and sending the downlink user plane data to the satellite terminal.
3. A method for satellite communication, applied to a ground station, the method comprising:
sending an initial context establishment request message to the satellite;
receiving a radio bearer configuration request message sent by the satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
and carrying out user plane data interaction with the satellite through a ground data link layer configured with the radio bearer channel.
4. The method of claim 3, wherein the interacting with the satellite via the terrestrial data link layer configured with the radio bearer channel comprises:
receiving downlink user plane data of a core network, and sending the downlink user plane data to the satellite through a ground data link layer configured with the wireless bearer channel;
and receiving uplink user plane data sent by the satellite through the ground data link layer, and forwarding the uplink user plane data to a core network.
5. A satellite comprising a network layer and a physical layer;
the network layer is to:
after receiving an initial context establishment request message of a ground station system, establishing a radio bearer channel with a satellite terminal;
sending a radio bearer configuration request message to the ground station, and receiving a radio bearer configuration response message fed back by the ground station to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
the physical layer is to:
and carrying out user plane data interaction with the ground station system through a ground data link layer configured with the radio bearer channel.
6. The satellite of claim 5, wherein the physical layer, when interacting with the ground station system via the ground data link layer configured with the radio bearer channel, is specifically configured to:
receiving uplink user plane data of a satellite terminal, and sending the uplink user plane data to the ground station system through a ground data link layer configured with the wireless bearer channel;
and receiving downlink user plane data sent by the ground station system through the ground data link layer, and sending the downlink user plane data to the satellite terminal.
7. A ground station, comprising a ground station system and a ground data link layer;
the ground station system is to:
sending an initial context establishment request message to the satellite;
the terrestrial data link layer is to:
receiving a radio bearer configuration request message sent by the satellite, and feeding back a radio bearer configuration response message to the satellite to complete configuration of a radio bearer channel of a ground data link layer; wherein the ground data link layer is deployed at a ground station;
the ground station system is configured to:
and carrying out user plane data interaction with the satellite through a ground data link layer configured with the radio bearer channel.
8. The ground station of claim 7, wherein the ground station system, when interacting with the satellite via the ground data link layer configured with the rb, is specifically configured to:
receiving downlink user plane data of a core network, and sending the downlink user plane data to the satellite through a ground data link layer configured with the wireless bearer channel;
and receiving uplink user plane data sent by the satellite through the ground data link layer, and forwarding the uplink user plane data to a core network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211239419.3A CN115665885A (en) | 2022-10-11 | 2022-10-11 | Satellite communication method, ground station and satellite |
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| CN202211239419.3A CN115665885A (en) | 2022-10-11 | 2022-10-11 | Satellite communication method, ground station and satellite |
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