CN106533537B - Method for injecting remote control instruction of ground station into satellite - Google Patents
Method for injecting remote control instruction of ground station into satellite Download PDFInfo
- Publication number
- CN106533537B CN106533537B CN201611001252.1A CN201611001252A CN106533537B CN 106533537 B CN106533537 B CN 106533537B CN 201611001252 A CN201611001252 A CN 201611001252A CN 106533537 B CN106533537 B CN 106533537B
- Authority
- CN
- China
- Prior art keywords
- satellite
- remote control
- ground station
- ground
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- 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
- H04B7/18517—Transmission equipment in earth stations
-
- 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
- H04B7/18519—Operations control, administration or maintenance
-
- 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
- H04B7/204—Multiple access
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention relates to a method for injecting a ground station remote control instruction into a satellite, which comprises the steps of distinguishing a ground station remote control instruction injection port; framing the injected remote control command and obtaining a transmission frame; a step of simultaneously accessing a plurality of ground stations to the same satellite; coordinating a plurality of ground stations to transmit transmission frames to the same satellite according to a time sequence; the step of distinguishing the remote control instruction injection port of the ground station comprises the operation of reading transmission source address information, destination address information, source port number information, destination port number information and transmission priority information through the ground station; and then adding the transmission source address information, the destination address information, the source port number information, the destination port number information and the transmission priority information into the operation of the head position of the transmission frame.
Description
Technical Field
The invention relates to a method for injecting a remote control command of a ground station into a satellite.
Background
In the process of injecting the traditional satellite remote control instruction, different satellites occupy different measurement and control frequency points. When a plurality of ground stations simultaneously inject remote commands to one satellite, interference between communications occurs, thereby causing command injection failure. Therefore, the design and construction work of the ground measurement and control network becomes more complex and cannot adapt to flexible use requirements. In the more advanced spread spectrum remote control instruction injection method, due to the asynchronous characteristic of remote control data transmission of different satellites and intersymbol interference of spread spectrum codes, the number of ground stations which can be simultaneously accessed and injected with remote control instructions is less than 10, the number of ground stations which are simultaneously accessed and injected with remote control instructions to the satellites is very limited, and the implementation complexity of satellite receiving equipment can be greatly increased. With the gradual opening and diversification of satellite applications, more and more application scenes are available for simultaneously injecting remote control instructions into a plurality of ground stations, and it is necessary to provide a more economical method for injecting remote control instructions into the same satellite by using the same frequency point by a plurality of ground stations.
Disclosure of Invention
In order to inject remote control instructions into the same satellite by using the same frequency point at a plurality of ground stations, the invention provides a method for injecting the remote control instructions into the satellite by the ground stations, which comprises the step of distinguishing remote control instruction injection ports of the ground stations; framing the injected remote control command and obtaining a transmission frame; a step of simultaneously accessing a plurality of ground stations to the same satellite; coordinating a plurality of ground stations to transmit transmission frames to the same satellite according to a time sequence; the step of distinguishing the remote control instruction injection port of the ground station comprises the operation of reading transmission source address information, destination address information, source port number information, destination port number information and transmission priority information through the ground station; and then adding the transmission source address information, the destination address information, the source port number information, the destination port number information and the transmission priority information into the operation of the head position of the transmission frame.
Preferably, the step of framing the injected remote control command and obtaining a transmission frame includes dividing the ground station remote control command into a plurality of data packets according to a fixed length; and adding the data packet group frame to the transmission frame.
Preferably, the step of coordinating the plurality of ground stations to transmit the transmission frames to the same satellite in time sequence is realized by a channel reservation multiple access mode based on collision detection between each ground station, and includes an operation of the ground stations waiting for the satellite, an operation of the ground stations receiving a channel frequency point state through a cable network, and an operation of the ground stations transmitting the transmission frames to the satellite if a communication frequency point between the satellite and the ground stations is idle; otherwise, the ground station carries out the operation of waiting again on the satellite;
If the operation of transmitting the transmission frame to the satellite by the ground station is successful, detecting whether the response of the satellite is received; if receiving the response, sending a subsequent transmission frame of the same service in an uplink way; otherwise, the ground station performs a re-waiting operation on the satellite.
Preferably, the re-waiting of the satellite by the ground station is realized by additionally waiting for a random interval by the ground station.
Preferably, the ground station additionally waits for a random interval by each ground station generating a random number by itself and transmitting a broadcast command to other ground stations in cooperation with one ground station.
The step of distinguishing the remote control instruction injection ports of the ground stations is used for distinguishing the node addresses, so that different ground stations are mutually distinguished to realize that different communication links are formed between a plurality of ground stations and the same satellite. And different services of the same node are distinguished by adopting service port numbers for the same ground station, so that a satellite data transmission channel with the same frequency can be repeatedly used.
In this manner, the same satellite can be remotely controlled by 65536 ground stations at the same time. When a plurality of ground stations need to inject a remote control command into one satellite at the same time, the ground stations realize channel reservation through collision detection so as to finish multiple access, and the satellite is injected with the remote control command by utilizing random access and a satellite remote control transmission channel with the same frequency in time division multiplexing. And the low-cost remote control of a plurality of ground stations is realized by sharing the measurement and control frequency points. And the ground station is coordinated to upload remote control data to each satellite according to time sequence through collision detection and channel reservation.
Drawings
Fig. 1 is a diagram illustrating a transmission frame transmitting step at a transmitting end.
Fig. 2 is a schematic diagram of a step of receiving a transmission frame by a receiving end.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
as shown in the schematic diagram of the step of transmitting the transmission frame by the transmitting end in fig. 1 and the schematic diagram of the step of receiving the transmission frame by the receiving end in fig. 2, in the satellite remote control task, the uplink injection of the satellite remote control data is a main task of the satellite-ground link. The specific implementation mode of the invention adopts the following steps to realize the uplink injection of the satellite remote control command. And the ground station transmits data to the satellite to realize the uplink injection of the satellite remote control command.
In order to distinguish data transmitted by multiple ground stations to the same satellite, different node addresses are used to distinguish the different ground stations from each other to achieve different communication links between the multiple ground stations and the same satellite. These communication links have the same transmission frequency for the same satellite. Remote command data from an uplink injection satellite at a ground station is differentiated by differentiating the remote command injection ports. When the satellite remote control command is injected in an uplink mode, the ground station serves as a sending end and the satellite serves as a receiving end. This process distinguishes between ground station remote command injection ports. Distinguishing remote control instruction injection ports of the ground stations, wherein the distinguishing comprises reading transmission source address information, destination address information, source port number information, destination port number information and transmission priority information through each ground station; then adding the transmission source address information, the destination address information, the source port number information, the destination port number information and the transmission priority information into the head position of the transmission frame.
The uplink injection satellite remote control command is a process of injecting a ground station remote control command into a satellite. The injected remote control commands must be content specific, which is compressed within the transmission frame, i.e. framing the injected remote control commands and obtaining the transmission frame. First, the ground station divides the satellite remote control command into a plurality of data packets according to a fixed length, and each data packet is encapsulated in a transmission frame. Each satellite remote control command is divided into a plurality of fixed-length data packets according to at least 200 bytes. The data format of the transmission frame is composed of a source address field, a destination address field, a source port number field, a destination port number field, a priority field, a satellite remote control data packet field and a check code field. The source address information occupies 2 bytes, the destination address information occupies 2 bytes, the source port number information occupies 1 byte, the destination port number information occupies 1 byte, the priority information occupies 1 byte, the satellite data packet information occupies at least 200 bytes, and the check code information occupies 4 bytes. The byte occupied by each transmission frame is the sum of the above bytes.
The source address is the different ground station identification number that sent the remote control command. The destination addresses are different satellite identification numbers for receiving remote control commands. The source port number is a remote control command sending service type number of the ground station and is used for distinguishing different services on the same ground station. The destination port number is a remote control instruction receiving processing service type number of the satellite and is used for distinguishing different services of a receiving end. The priority is determined by the importance of the remote control instruction frame, and the more important the remote control instruction frame is, the higher the priority is. The priorities are used to control the access sequence of different users, and when multiple ground stations transmit transmission frames to the same satellite, to control the sequence in which the transmission frames of different services are injected into the same satellite.
A satellite remote control command intercepts a satellite remote control data packet every at least 200 bytes from the first bit data thereof. Thus, a satellite telemetry command can be divided into a plurality of satellite telemetry packets. After a satellite remote control command is segmented, if a satellite remote measurement data packet is less than 200 bytes long, the insufficient part is occupied by 0. Thus, a long satellite remote control command is divided into a plurality of satellite remote control packets 200 bytes long.
The check code information may be generated using a CRC check code and then the generated CRC check code is added to the transmission frame.
Multiple ground stations can access the same satellite at the same time, but the multiple ground stations cannot inject remote control commands to the same satellite at the same time. Therefore, it is necessary to coordinate the uploading of satellite remote control data from a plurality of ground stations to the same satellite in time sequence. This requires coordinating the transmission of time-sequenced frames from multiple ground stations to the same satellite.
By adopting the channel reservation multi-access method of collision detection, a plurality of ground stations can remotely control a satellite sharing frequency point and upload satellite remote control instruction data according to time sequence, and burst simple remote control instruction short messages and orbit parameter injection instruction continuous data streams are transmitted. The ground stations are interconnected by a wired network. If one ground station is in the transmission state of the remote control command, the ground station in the transmission state of the remote control command broadcasts the information that the transmission channel is occupied to the ground station in the waiting state through the wired network. The ground station receiving the channel occupation information will choose to wait for a certain time delay before attempting to send the satellite remote control command data stream again. And each ground station reserves multiple access transmission data through a channel for completing collision detection through the network. The channel reservation multi-address transmission data of collision detection comprises that a ground station waits for a satellite, and the ground stations are interconnected through a wired network to realize information interaction of remote control instruction sending states among the ground stations, so that collision detection among a plurality of ground stations is realized.
At this time, the ground station is a transmitting end, and the satellite is a receiving end. The ground station waits for the satellite to determine whether a remote control command transmission frame can be transmitted to the satellite.
The ground station sends a remote control command transmission frame. The ground stations detect whether the channel is occupied or not through a wired network communication channel at regular intervals. If the channel frequency point is occupied, the channel frequency point is busy, and the channel is unavailable. At this time, some ground station is sending the remote control command, and other ground stations receive the busy state information of the channel frequency point and cannot send data to the satellite. And the other ground stations re-wait. When no ground station sends information to the satellite, namely the satellite frequency point is idle, the ground station sends remote control instruction data and waits for the satellite to make a response signal. When the ground station receives the satellite response signal, the ground station can determine that the transmission frame is successfully transmitted and continuously transmit the next transmission frame to the upper note of all remote control instruction data completing the same service of the ground station, and then the ground station enters the waiting state again. If the ground station does not receive the satellite response signal, the ground station considers that the transmission frame transmission has failed. And carrying out collision detection again between the ground stations to determine whether the frequency point is available.
The satellite receives the transmission frame. The satellite waits for the ground station to transmit data. Once the satellite receives the data transmitted by the ground station, the satellite returns a corresponding reply.
After collision detection is carried out between the ground stations, when the result display frequency point is busy, the ground stations carry out collision detection again by adjusting the collision detection waiting interval time T (n). And receiving the road occupation state information among all the ground stations according to the same waiting interval T (1). If the satellite cannot be accessed, the ground station needs to detect the channel occupation state again after a random interval δ t (n) to try to access the satellite.
If a certain ground station needs to continuously inject remote control commands into the satellite, the ground station in the transmitting state sends commands to the ground station in the waiting state through the network so as to adjust the initial waiting phase delta t of the ground station in the waiting state, and when one ground station injects continuous data streams upwards, other ground stations are scheduled to avoid the remote control commands.
The waiting time for receiving the channel occupancy information is T (n) ═ T (1) + δ T (n) + Δ T, where n is the number of times of detecting the channel occupancy status information before successful access. If a certain ground station successfully accesses the satellite, the value of n is restored to 1. T (1) is waiting time of first channel occupation state information detection before the ground station sends the remote control command after the satellite enters the field, and all satellites have the same T (1). δ T (n) is a random waiting time which is automatically generated by the ground station and increased according to a random number after any ground station detects the channel occupation state information every time and finds that a frequency point is busy or access fails, and the time is less than T (1) and δ T (1) is 0. And the delta t is default to be 0, each ground station in the channel occupation state actively sends a continuous waiting instruction to other ground stations in the waiting state in a mode of sending a broadcast instruction, the instruction requires the ground in the waiting state to wait according to the delta t value, and the delta t is automatically recovered to be 0 after the ground station sending the broadcast instruction is successfully accessed to the satellite and injected with the instruction. When the ground station occupies the frequency point for a long time and sends larger data, the initial waiting phase delta t of other ground stations can be actively applied and adjusted, and a broadcast instruction is sent to all other networked ground stations, so that the delta t of each ground station is equal to D, the ground stations try to access after delaying the duration of D under the condition that the original initial waiting phase is unchanged, and then the delta t is automatically recovered to 0.
When a certain ground station requests to set delta t equal to 0, the adjusted ground station records the actual channel occupation time length L and compares the actual channel occupation time length L with D, and the system design margin is P, wherein P is more than or equal to 0 and less than or equal to 1. If (1+ P). times.L less than D occurs, all networked ground stations may be denied the next time the Δ t set request is received. Therefore, the interference information from outside the network can be prevented from being mistaken for the information from inside the network, and the initial waiting phase delta t is prevented from being maliciously adjusted.
The different ground stations are distinguished from each other by adopting the node addresses, and different services of the same node are distinguished by the service port number, so that the same satellite data transmission channel can be repeatedly used. In this manner, the same satellite can be remotely controlled by 65536 ground stations at the same time. The ground stations are connected through a cable network, channel occupation information is mutually transmitted, random access and time division multiplexing are realized, and a satellite data transmission channel is shared to finish data between the ground stations and the satellite. And the low-cost remote control instruction data injection of a plurality of ground stations to the same satellite is realized by sharing the measurement and control frequency point. The access to each ground station and the sending of remote control commands by using the same frequency point are realized by adjusting the waiting time for receiving the channel occupation information so as to avoid the interference between the ground stations. The method greatly reduces the implementation cost and the technical risk, and has stronger engineering application and system realizability.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A method for injecting a ground station remote control instruction into a satellite is characterized by comprising the steps of distinguishing a ground station remote control instruction injection port; framing the injected remote control command and obtaining a transmission frame; a step of simultaneously accessing a plurality of ground stations to the same satellite; coordinating a plurality of ground stations to transmit transmission frames to the same satellite according to a time sequence; the step of distinguishing the remote control instruction injection port of the ground station comprises the operation of reading transmission source address information, destination address information, source port number information, destination port number information and transmission priority information through the ground station; then adding the transmission source address information, the destination address information, the source port number information, the destination port number information and the transmission priority information into the operation of the head position of the transmission frame;
The step of coordinating the plurality of ground stations to send the transmission frames to the same satellite according to the time sequence is realized by a channel reservation multi-access mode based on collision detection between every two ground stations, and comprises the operation that the ground stations wait for the satellite, the ground stations receive the operation of the channel frequency point state through a wired network, and if the communication frequency points between the satellite and the ground stations are idle, the ground stations send the transmission frames to the satellite; otherwise, the ground station carries out the operation of waiting again on the satellite; if the operation of transmitting the transmission frame to the satellite by the ground station is successful, detecting whether the response of the satellite is received; if receiving the response, sending a subsequent transmission frame of the same service in an uplink way;
otherwise, collision detection is carried out again between the ground stations, and whether the frequency point is available or not is determined.
2. The method of claim 1, wherein the step of framing the injected remote control commands and obtaining the transmission frames comprises dividing the ground station remote control commands into a plurality of data packets according to a fixed length; and adding the data packet group frame to the transmission frame.
3. the method of claim 1, wherein the earth station waits again for the satellite by additionally waiting a random interval.
4. A method as claimed in claim 3, wherein said ground station additionally waits for a random interval by each ground station generating a random number and broadcasting the random number to other ground stations in cooperation with one ground station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001252.1A CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001252.1A CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106533537A CN106533537A (en) | 2017-03-22 |
| CN106533537B true CN106533537B (en) | 2019-12-13 |
Family
ID=58351673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611001252.1A Active CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106533537B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612612B (en) * | 2017-09-22 | 2020-07-14 | 上海卫星工程研究所 | Satellite measurement and control communication system |
| CN108696945B (en) * | 2018-05-11 | 2020-08-14 | 西安空间无线电技术研究所 | Random access method for low-earth-orbit satellite communication system |
| CN109347537B (en) * | 2018-09-19 | 2020-10-20 | 上海微小卫星工程中心 | Data priority synchronous adjustment and data retrieval method for time division system constellation network |
| CN114285460B (en) * | 2021-12-31 | 2024-04-19 | 浙江时空道宇科技有限公司 | Satellite measurement and control method, device, electronic equipment, storage medium and program product |
| CN115242287A (en) * | 2022-01-04 | 2022-10-25 | 北京电子工程总体研究所 | Ground measurement, operation and control method and system for satellite constellation |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309764A (en) * | 1979-06-22 | 1982-01-05 | Bell Telephone Laboratories, Incorporated | Technique for increasing the rain margin of a satellite communication system |
| EP0748066A2 (en) * | 1995-06-06 | 1996-12-11 | Globalstar L.P. | Closed loop power control for low earth orbit satellite communications system |
| US5870665A (en) * | 1995-01-27 | 1999-02-09 | Nec Corporation | Mobile satellite communication terminal |
| US6337658B1 (en) * | 1999-11-30 | 2002-01-08 | Nortel Networks Limited | Transmit antenna alignment peak search method and apparatus |
| CN1466824A (en) * | 2000-07-26 | 2004-01-07 | �������ɭ | Satellite communication system using multiple earth stations |
| WO2008148188A1 (en) * | 2007-06-08 | 2008-12-11 | Com Dev International Ltd. | System and method for decoding automatic identification system signals |
| CN101354828A (en) * | 2008-09-12 | 2009-01-28 | 航天东方红卫星有限公司 | Method for transporting and managing satellite constellation information |
| CN101739846A (en) * | 2008-11-10 | 2010-06-16 | Itt制造企业公司 | Transmitting and scheduling method for ADS-B ground-based system |
| DK1026519T3 (en) * | 1999-02-08 | 2010-08-16 | Ses Astra Sa | Method and apparatus for distance measurement for satellites |
| CN102098092A (en) * | 2011-01-25 | 2011-06-15 | 大连大学 | Method for quickly establishing satellite-to-ground link |
-
2016
- 2016-11-14 CN CN201611001252.1A patent/CN106533537B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309764A (en) * | 1979-06-22 | 1982-01-05 | Bell Telephone Laboratories, Incorporated | Technique for increasing the rain margin of a satellite communication system |
| US5870665A (en) * | 1995-01-27 | 1999-02-09 | Nec Corporation | Mobile satellite communication terminal |
| EP0748066A2 (en) * | 1995-06-06 | 1996-12-11 | Globalstar L.P. | Closed loop power control for low earth orbit satellite communications system |
| DK1026519T3 (en) * | 1999-02-08 | 2010-08-16 | Ses Astra Sa | Method and apparatus for distance measurement for satellites |
| US6337658B1 (en) * | 1999-11-30 | 2002-01-08 | Nortel Networks Limited | Transmit antenna alignment peak search method and apparatus |
| CN1466824A (en) * | 2000-07-26 | 2004-01-07 | �������ɭ | Satellite communication system using multiple earth stations |
| WO2008148188A1 (en) * | 2007-06-08 | 2008-12-11 | Com Dev International Ltd. | System and method for decoding automatic identification system signals |
| CN101354828A (en) * | 2008-09-12 | 2009-01-28 | 航天东方红卫星有限公司 | Method for transporting and managing satellite constellation information |
| CN101739846A (en) * | 2008-11-10 | 2010-06-16 | Itt制造企业公司 | Transmitting and scheduling method for ADS-B ground-based system |
| CN102098092A (en) * | 2011-01-25 | 2011-06-15 | 大连大学 | Method for quickly establishing satellite-to-ground link |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106533537A (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106533537B (en) | Method for injecting remote control instruction of ground station into satellite | |
| US20190342861A1 (en) | Wireless communication system and wireless communication control method, wireless communication device and wireless communication method, and computer program | |
| KR100940839B1 (en) | Method and related apparatus for setting packet headers in a wireless communications system | |
| US5852405A (en) | Wireless LAN system | |
| CN100539588C (en) | Communication equipment, communication means and communication system | |
| US20040038684A1 (en) | Wireless communication system, wireless communication device and method, and computer program | |
| CN101233724A (en) | Range extension between two wireless devices | |
| EP2869502A1 (en) | Method of packaging and unpackaging packet and apparatuses using the same | |
| KR20140001913A (en) | / method and system for minimizing latencies for content protection in audio/video networks | |
| US4930122A (en) | Message transfer system and method | |
| US6351469B1 (en) | Sound/data sharing communications system | |
| CN102781040A (en) | Concatenated frame structure for data transmission | |
| US6542494B1 (en) | Communication control method and transmission apparatus | |
| KR101050584B1 (en) | Apparatus and method for controlling medium access in wireless access system | |
| CN115914134A (en) | Vehicle-mounted Ethernet data transmission method and device based on TSN frame preemption mechanism | |
| JP3357282B2 (en) | Packet transmission method | |
| EP3138222B1 (en) | Link-fault tolerance in a distributed antenna system | |
| US6822968B1 (en) | Method and apparatus for accounting for delays caused by logic in a network interface by integrating logic into a media access controller | |
| KR100927980B1 (en) | Method and apparatus for processing packet deletion in wireless communication system | |
| CN106571865B (en) | Telemetry data access transmission method of satellite constellation | |
| CA2211236A1 (en) | Apparatus and method for connecting communications networks | |
| CN115665889A (en) | Point-to-point real-time anti-interference burst communication link construction method | |
| US20180042049A1 (en) | Multi-destination burst protocol | |
| CN111065080B (en) | Data transmission method based on Bluetooth router and Bluetooth router | |
| US20230053510A1 (en) | Method and a system for accessing a wireless channel in a dense enviroment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |