WO2023011362A1 - 一种北斗通信***中出站传输控制方法、***及相关装置 - Google Patents
一种北斗通信***中出站传输控制方法、***及相关装置 Download PDFInfo
- Publication number
- WO2023011362A1 WO2023011362A1 PCT/CN2022/109123 CN2022109123W WO2023011362A1 WO 2023011362 A1 WO2023011362 A1 WO 2023011362A1 CN 2022109123 W CN2022109123 W CN 2022109123W WO 2023011362 A1 WO2023011362 A1 WO 2023011362A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slc
- terminal
- frame
- network device
- pdu
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims abstract description 174
- 230000006854 communication Effects 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 154
- CDDBPMZDDVHXFN-ONEGZZNKSA-N 2-[(e)-3-(1,3-benzodioxol-5-yl)prop-2-enyl]-1-hydroxypiperidine Chemical compound ON1CCCCC1C\C=C\C1=CC=C(OCO2)C2=C1 CDDBPMZDDVHXFN-ONEGZZNKSA-N 0.000 claims abstract description 141
- 230000005540 biological transmission Effects 0.000 claims description 92
- 238000012545 processing Methods 0.000 claims description 63
- 230000006870 function Effects 0.000 claims description 53
- 230000015654 memory Effects 0.000 claims description 41
- 238000004590 computer program Methods 0.000 claims description 35
- 230000006835 compression Effects 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- 238000004422 calculation algorithm Methods 0.000 claims description 25
- 238000001228 spectrum Methods 0.000 claims description 18
- 238000012795 verification Methods 0.000 claims description 10
- 208000033748 Device issues Diseases 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 253
- 102100036409 Activated CDC42 kinase 1 Human genes 0.000 description 211
- 238000010586 diagram Methods 0.000 description 40
- 230000007246 mechanism Effects 0.000 description 24
- 230000008569 process Effects 0.000 description 20
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 15
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 15
- 230000005236 sound signal Effects 0.000 description 13
- 238000013461 design Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 12
- 238000010295 mobile communication Methods 0.000 description 12
- 238000005538 encapsulation Methods 0.000 description 9
- 238000007726 management method Methods 0.000 description 9
- 238000012790 confirmation Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000003993 interaction Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 229920001621 AMOLED Polymers 0.000 description 4
- 238000013528 artificial neural network Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 210000000352 storage cell Anatomy 0.000 description 3
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000010267 cellular communication Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000013529 biological neural network Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003238 somatosensory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
Definitions
- the present application relates to the technical field of satellite communication, and in particular to a method, system and related device for outbound transmission control in the Beidou communication system.
- the Beidou satellite navigation system is a major infrastructure independently developed by my country that integrates positioning, timing, and communication.
- the Beidou short message communication service is one of the characteristics of the Beidou satellite navigation system that distinguishes it from other global navigation systems such as GPS, GLONASS, and GALILEO.
- the Beidou short message communication service is especially suitable for communication in areas where mobile communication is not covered, or cannot be covered, or the communication system is damaged, such as oceans, deserts, grasslands, and uninhabited areas.
- the communication system of the Beidou-3 satellite has upgraded the short-message technology system, and opened some necessary resources of the Beidou communication system to civilian use. According to the characteristics of civilian business and equipment, the communication protocol needs to be designed according to the characteristics of the Beidou communication system.
- This application provides an outbound transmission control method, system and related devices in the Beidou communication system. Through the method provided by the embodiment of this application, reliable and effective transmission of outbound services can be realized under the limitation of low outbound data capacity.
- the present application provides a method for controlling outbound transmission in the Beidou communication system
- the method may include: Beidou network equipment generates a first user frame sent to the first terminal at the satellite link control SLC layer, and sends to The second user frame of the second terminal; wherein, the frame header information of the first user frame includes a first user ID field and a first frame type field; the first user ID field is used to indicate the terminal receiving the first user frame; the first The ID information of the first terminal is included in the user ID field; the first frame type field is used to indicate the frame type of the first user frame; the frame header information of the second user frame includes a second user ID field and a second frame type field; The second user ID field is used to indicate the terminal receiving the second user frame; the second user ID field contains the ID information of the second terminal; the second frame type field is used to indicate the frame type of the second user frame; The PHY layer generates the first physical frame based on the first user frame and the second user frame; the Beidou network device sends the first
- the first user frame includes a satellite link control layer protocol data unit SLC PDU and an acknowledgment character ACK frame, and an application layer receipt frame.
- the SLC PDU can be used to transmit data
- the confirmation character ACK frame can be used to indicate whether the Beidou network equipment has successfully received the SLC PDU of the terminal.
- the application layer receipt frame is used to indicate whether the Beidou network equipment successfully parses the received application layer message.
- Beidou network equipment can transmit user frames of multiple end users at the same time, thereby achieving reliable and efficient transmission of outbound services under the limitation of low outbound data capacity. Moreover, Beidou network equipment can also send different types of user frames. In this way, the requirements of different outbound services may not be met.
- the first user frame is the first satellite link control layer protocol data unit SLC PDU in the first satellite link control layer service data unit SLC SDU, and the first user frame
- the frame header information also includes the AM enable field, the frame total number field, and the frame sequence number field of the confirmation mode; among them, the AM enable field is used to indicate that the first terminal responds to ACK or not to reply ACK; the frame total number field is used to indicate that Beidou network equipment sends The number of SLC PDUs for the first terminal; the frame sequence number field is used to indicate the sequence number of the SLC PDU sent by Beidou network equipment.
- the AM enable field of the first SLC PDU is the first value, and the first value is used to indicate that the first terminal does not reply ACK.
- the AM enable field of the first SLC PDU is a second value, and the second value is used to indicate that the first terminal replies with an ACK.
- the device receiving the first SLC PDU can know whether it needs to reply ACK through the frame header information, and does not need to know whether it needs to reply ACK through separate signaling interaction.
- the first user frame is the first SLC PDU
- the method further includes: the Beidou network device continues to send the first SLC SDU One or more SLC PDUs in the first SLC SDU; after the Beidou network equipment sends all the SLC PDUs in the first SLC SDU, the Beidou network equipment receives the first ACK sent by the first terminal, and the first ACK is used to indicate that the first terminal is successful Receive all SLC PDUs in the first SLC SDU.
- the Beidou network device can know that the first terminal has successfully received the SLC SDU through the ACK returned by the first terminal. In this way, Beidou network equipment continues to send the next SLC SDU.
- the first user frame is the first SLC PDU
- the method further includes: after the Beidou network device sends the first SLC PDU, The Beidou network device receives the second ACK sent by the first terminal, and the second ACK is used to indicate that the first terminal has not successfully received the first SLC PDU; the Beidou network device allocates the resources of one or more SLC PDUs in the first SLC SDU To one or more SLC PDUs in the second SDU sent to the second terminal. In this way, the resources of Beidou network equipment can be saved and the recycling of resources can be realized.
- the first user frame is the first SLC PDU
- the method further includes: the Beidou network device continues to send the first SLC SDU One or more SLC PDUs; after the Beidou network equipment has sent all the SLC PDUs in the first SLC SDU, the Beidou network equipment receives the third ACK sent by the first terminal, and the third ACK indicates that the first terminal failed to receive the first SLC PDU. All SLC PDUs in the SLC SDU.
- the Beidou network device can determine the next operation according to the ACK replied by the first terminal, for example, end this sending.
- the frame header information of the first physical frame includes a rate indication field or a version number field; wherein, the rate indication field is used to indicate the transmission rate of the first physical frame; the version The number field is used to indicate the current version information of the first physical frame.
- the device receiving the physical frame can know the rate and version information of the physical frame.
- the first user frame is the first SLC PDU
- the Beidou network device generates the first user frame sent to the first terminal at the satellite link control layer SLC, and sends it to the first user frame
- the method also includes: the Beidou network equipment obtains the message data of the Beidou network equipment at the satellite link control SLC layer and aggregates multiple satellite link control layer service data units SLC SDU sent by the MDCP layer , wherein the multiple SLC SDUs include the first SLC SDU; the Beidou network equipment splits the first SLC SDU into N SLC PDUs at the SLC layer.
- the method further includes: the Beidou network device
- the MDCP layer obtains the application layer message sent by the application layer of the Beidou network device;
- the Beidou network device uses the application layer message as the MDCP SDU at the MDCP layer, and after adding the padding data and the redundant length indication field to the MDCP SDU, Split into multiple MDCP PDUs; among them, the redundant length indication field is used to indicate the data length of the padding data,
- the multiple MDCP PDUs include the first MDCP PDU, the header information of the first MDCP PDU includes the successor indication field, and the successor indication field It is used to indicate the order of the first MDCP PDU in multiple MDCP PDUs;
- Beidou network equipment sends multiple MDCP PDUs from the MDCP layer to the SLC layer as multiple SLC SDUs of the SLC layer.
- the method further includes: the Beidou network device obtains the original data; the Beidou network device obtains the original data; The network device compresses the original data at the application layer to obtain compressed data; the Beidou network device encrypts the compressed data at the application layer to obtain encrypted data; the Beidou network device adds header information to the encrypted data header to obtain Application layer message; wherein, the message header information includes a compression indication field and an encryption indication field, the compression indication field is used to indicate the compression algorithm used when compressing the original data, and the encryption indication field is used to indicate the encryption used when encrypting the compressed data algorithm.
- the Beidou network device splits the first SLC SDU into N SLC PDUs at the SLC layer, specifically including: the Beidou network device splits the first SLC PDU among the N SLC PDUs and the second SLC PDU to the PHY layer; the Beidou network equipment generates the first physical frame from the first SLC PDU at the PHY layer, and generates the second physical frame from the second SLC PDU; the Beidou network equipment sends the first physical frame and the second physics frame.
- the Beidou network device sending the first physical frame includes: the Beidou network device adds the first check digit information at the end of the first physical frame at the PHY layer, and The first physical frame and the first check digit information are encoded to obtain the first encoded data; the Beidou network equipment modulates the first encoded data and the first reserved field of the first encoded data at the PHY layer to obtain the first modulated data; the Beidou network The device spreads the first modulated data at the PHY layer to obtain the first spread spectrum modulated data; the Beidou network device sends the first spread spectrum modulated data and the first pilot information of the first spread spectrum modulated data at the PHY layer.
- the method may further include: the Beidou network device sends the last SLC PDU in the first SLC SDU based on the Beidou network device, the first terminal receives the first SLC The processing delay from the last SLC PDU in the SDU to sending the ACK and the air interface propagation delay determine the starting moment of the ACK receiving time window; Beidou network equipment starts to receive the ACK at the starting moment of the ACK receiving time window.
- the Beidou network equipment can determine the starting time of receiving the ACK.
- the method may further include: the Beidou network device sends the last SLC PDU in the first SLC SDU based on the Beidou network device, the first terminal receives the first SLC The processing delay from the last SLC PDU in the SDU to sending the ACK, the time length of the ACK sent by the first terminal, and the air interface propagation delay determine the end time of the ACK receiving time window; Stop receiving ACK at the end time.
- the Beidou network device can determine the end time of receiving the ACK.
- a method for controlling outbound transmission in the Beidou communication system may include: the first terminal receives the first physical frame sent by the Beidou network equipment; the first physical frame contains the first physical frame sent to the first terminal A user frame and a second user frame sent to the second terminal, wherein the frame header information of the first user frame includes a first user ID field and a first frame type field; the first user ID field is used to indicate the reception of the first user frame The terminal of the frame; the first user ID field contains the ID information of the first terminal; the first terminal parses the first user frame from the first physical frame, and discards the second user frame.
- the first user frame includes a satellite link control layer protocol data unit SLC PDU and an acknowledgment character ACK frame, and an application layer receipt frame.
- the SLC PDU can be used to transmit data
- the confirmation character ACK frame can be used to indicate whether the Beidou network equipment has successfully received the SLC PDU of the terminal.
- the application layer receipt frame is used to indicate whether the Beidou network equipment successfully parses the received application layer message.
- Beidou network equipment can transmit user frames of multiple end users at the same time, thereby achieving reliable and efficient transmission of outbound services under the limitation of low outbound data capacity. Moreover, Beidou network equipment can also send different types of user frames. In this way, the requirements of different outbound services may not be met. The first terminal may also receive different types of user frames.
- the first user frame is the first satellite link control layer protocol data unit SLC PDU in the first satellite link control layer service data unit SLC SDU, and the first user frame
- the frame header information also includes the AM enable field, the frame total number field, and the frame sequence number field of the confirmation mode; among them, the AM enable field is used to indicate that the first terminal responds to ACK or not to reply ACK; the frame total number field is used to indicate that Beidou network equipment sends The number of SLC PDUs for the first terminal; the frame sequence number field is used to indicate the sequence number of the SLC PDU sent by Beidou network equipment.
- the AM enable field of the first SLC PDU is the first value, and the first value is used to indicate that the first terminal does not reply ACK.
- the AM enable field of the first SLC PDU is a second value, and the second value is used to indicate that the first terminal replies with an ACK.
- the first terminal receiving the first SLC PDU can know whether it needs to reply ACK through the frame header information, and does not need to know whether it needs to reply ACK through separate signaling interaction.
- the first user frame is the first SLC PDU
- the first terminal parses the first user frame from the first physical frame, and after discarding the second user frame
- the method further Including: the first terminal receives one or more SLC PDUs in the first SLC SDU; when the first terminal receives all the SLC PDUs in the first SLC SDU, the first terminal sends the first ACK to the Beidou network equipment, and the first The ACK is used to indicate that the first terminal has successfully received all the SLC PDUs in the first SLC SDU.
- the value of the first ACK may be 1.
- the first user frame is the first SLC PDU in the first SLC SDU
- the first terminal parses the first user frame from the first physical frame, and discards the second user frame
- the method also includes: when the first SLC PDU analyzed by the first terminal is not the first SLC PDU in the first SLC SDU; the first terminal sends a second ACK to the Beidou network device and stops receiving the first SLC For the second SLC PDU in the SDU, the second ACK is used to indicate that the first terminal has not successfully received the first SLC PDU.
- the first user frame is the first SLC PDU in the first SLC SDU
- the first terminal parses the first user frame from the first physical frame, and discards the second user frame
- the method also includes: the first terminal receives one or more SLC PDUs in the first SLC SDU; when the first terminal does not collect all the SLC PDUs in the first SLC SDU within the SLC PDU receiving time window Afterwards, the first terminal sends a third ACK to the Beidou network device, and the third ACK is used to indicate that the first terminal has not successfully received all the SLC PDUs in the first SLC SDU.
- the first user frame is the first SLC PDU in the first SLC SDU
- the first terminal parses the first user frame from the first physical frame
- Discarding the second user frame includes: the first terminal obtains at the PHY layer the first spread spectrum modulation data sent by the terminal; the first terminal despreads the first spread spectrum modulation data at the PHY layer, Obtain the first modulation data and the first modulation synchronization header; the first terminal demodulates the first modulation data and the first modulation synchronization header at the PHY layer to obtain the first pilot data and the first synchronization header; the first terminal The PHY layer removes the pilot information in the first pilot data to obtain the first encoded data; the Beidou network device decodes the first encoded data at the PHY layer to obtain the physical frame of the first encoded block and the first verification information; the first The terminal verifies the first coding block based on the first verification information at the PHY layer, and after the verification succeeds, uses the first user frame whose
- the first terminal verifies the first coded block based on the first verification information at the PHY layer, and after the verification is successful, the After the first user frame with the same ID field as the ID of the first terminal is presented as the first SLC PDU in the first SLC SDU in the SLC layer of the first terminal to the SLC layer of the first terminal from the PHY layer, the method further includes: A terminal splices the received M SLC PDUs into a first SLC SDU at the SLC layer, and reports the first SLC SDU as the first MDCP PDU of the MDCP layer from the SLC layer of the first terminal to the MDCP layer of the first terminal, The packet header information of the first MDCP PDU includes a successor indication field, and the successor indication field is used to indicate the order of the first MDCP PDU in multiple MDCP PDUs sent by the Beidou network equipment.
- the method further includes: the first terminal obtains at the MDCP layer the second MDCP PDU reported from the first terminal SLC layer; when the second MDCP PDU in the second MDCP PDU When indicating that the second MDCP PDU is the last one of multiple MDCP PDUs sent by Beidou network equipment, the first terminal splices the first MDCP PDU and the second MDCP PDU into an MDCP SDU at the MDCP layer, and reports the MDCP SDU as an application layer The text is reported from the MDCP layer to the application layer.
- the application layer message includes message header information and encrypted data
- the message header information includes an encryption indication field and a compression indication field
- the compression indication field is used to instruct the terminal to convert the original
- the encryption indication field is used to indicate the encryption algorithm used when the terminal encrypts the compressed data into encrypted data
- the method also includes: the first terminal encrypts in the application layer message through the application layer The encryption algorithm indicated by the indication field decrypts the encrypted data in the application layer message to obtain compressed data; the first terminal decompresses the compressed data at the application layer through the compression algorithm indicated by the compression indication field in the application layer message, get the raw data.
- the method further includes: the first terminal based on the frame sequence number of the received SLC PDU, the time length of the SLC PDU sent by the Beidou network device, and an SLC sent by the Beidou network device The total number of SLC PDU frames in the SDU and the sending interval between the SLC PDUs determine the time length of the SLC PDU receiving window in the first terminal.
- the method further includes: the first terminal is based on the time length of the SLC PDU receiving window, the receiving moment of the first SLC PDU, the signal processing delay of the first terminal, and the second The time length of the ACK sent by a terminal determines the time point when the first terminal sends the ACK.
- a Beidou communication system including Beidou network equipment and a first terminal, wherein:
- the Beidou network equipment is used to generate the first user frame sent to the first terminal and the second user frame sent to the second terminal at the satellite link control layer SLC; wherein, the frame header information of the first user frame includes the first user frame ID field and first frame type field; the first user ID field is used to indicate the terminal receiving the first user frame; the first user ID field contains the ID information of the first terminal; the first frame type field is used to indicate the first user The frame type of the frame; the frame header information of the second user frame includes a second user ID field and a second frame type field; the second user ID field is used to indicate the terminal receiving the second user frame; the second user ID The field includes ID information of the second terminal; the second frame type field is used to indicate the frame type of the second user frame;
- the Beidou network device is used to generate the first physical frame based on the first user frame and the second user frame at the physical PHY layer;
- the Beidou network device is used to send the first physical frame
- the first terminal is configured to receive the first physical frame sent by the Beidou network device; parse the first user frame from the first physical frame, and discard the second user frame.
- Beidou network equipment can transmit user frames of multiple end users at the same time, thereby achieving reliable and efficient transmission of outbound services under the limitation of low outbound data capacity. Moreover, Beidou network equipment can also send different types of user frames. In this way, the requirements of different outbound services may not be met.
- the Beidou communication system may further include a second terminal, where the second terminal is configured to receive the first physical frame sent by the Beidou network device; from the first physical frame Parsing out the second user frame.
- the Beidou network device may also execute the method in any possible implementation manner of the foregoing first aspect.
- the terminal may also execute the method in any possible implementation manner of the second aspect above.
- the present application provides a communication device, including one or more processors, one or more memories, and a transceiver.
- the transceiver, the one or more memories are coupled to the one or more processors, the one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the The communication device executes the method in any possible implementation manner of the foregoing first aspect.
- the communication device may be Beidou network equipment, or any network element or a combination of multiple network elements in the Beidou network equipment.
- the present application provides a communication device, including one or more processors, one or more memories, and a transceiver.
- the transceiver, the one or more memories are coupled to the one or more processors, the one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the The communication device executes the method in any possible implementation manner of the second aspect above.
- the communication device may be a terminal or other product form equipment.
- the present application provides a computer storage medium, including computer instructions.
- the computer instructions When the computer instructions are run on the computer, the computer is made to execute the method in any possible implementation manner of the first aspect above.
- the present application provides a computer storage medium, including computer instructions.
- the computer instructions When the computer instructions are run on the computer, the computer is made to execute the method in any possible implementation manner of the second aspect above.
- the present application provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any possible implementation manner of the first aspect above.
- the present application provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any possible implementation manner of the second aspect above.
- the present application provides a chip or a chip system, which is applied to a terminal, and includes a processing circuit and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processing circuit, and the processing circuit is used to run the code instructions To execute the method in any possible implementation manner of the second aspect above.
- FIG. 1 is a schematic structural diagram of a Beidou communication system 10 provided by an embodiment of the present application.
- FIG. 2 is a schematic diagram of a data outbound transmission process in a Beidou communication system provided by an embodiment of the present application
- FIG. 3 is a schematic diagram of a protocol encapsulation framework for outbound data of a Beidou communication system 10 provided in an embodiment of the present application;
- FIG. 4 is a schematic diagram of a protocol analysis framework for outbound data of a Beidou communication system 10 provided by an embodiment of the present application;
- FIG. 5 is a schematic diagram of a data format of outbound data provided by an embodiment of the present application.
- Fig. 6 is a schematic diagram of another outbound data data format provided by the embodiment of the present application.
- FIG. 7A is a schematic diagram of a frame format of an SLC frame provided by an embodiment of the present application.
- FIG. 7B is a schematic diagram of a frame format of another SLC frame provided by an embodiment of the present application.
- FIG. 7C is a schematic diagram of a frame format of another SLC frame provided by the embodiment of the present application.
- FIG. 7D is a schematic diagram of a frame format of another SLC frame provided by the embodiment of the present application.
- FIG. 8A is a schematic diagram of a successful transmission scenario of the first transmission mechanism of the SLC layer when data is outbound provided by an embodiment of the present application;
- FIG. 8B is a schematic diagram of a transmission failure scenario of SLC layer transmission mechanism 1 when data is outbound provided by an embodiment of the present application;
- FIG. 9A is a schematic diagram of a successful transmission scenario of the second transmission mechanism of the SLC layer when data is outbound provided by the embodiment of the present application;
- FIG. 9B is a schematic diagram of a transmission failure scenario of the second transmission mechanism of the SLC layer when data is outbound provided by the embodiment of the present application;
- FIG. 10A is a schematic diagram of a successful transmission scenario of the third transmission mechanism of the SLC layer when data is outbound provided by the embodiment of the present application;
- FIG. 10B is a schematic diagram of a successful transmission scenario of another transmission mechanism 3 of the SLC layer when the data is outbound provided by the embodiment of the present application;
- FIG. 10C is a schematic diagram of a transmission failure scenario of the third transmission mechanism of the SLC layer when data is outbound provided by the embodiment of the present application;
- FIG. 11A is a schematic diagram of a transmission failure scenario of SLC layer transmission mechanism 4 when data is outbound provided by an embodiment of the present application;
- FIG. 11B is a schematic flow diagram of a method for controlling outbound transmission in the Beidou communication system provided by an embodiment of the present application.
- FIG. 12 is a schematic structural diagram of a terminal 100 provided in an embodiment of the present application.
- FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
- FIG. 14 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
- FIG. 15 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
- FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
- first and second are used for descriptive purposes only, and cannot be understood as implying or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, the “multiple” The meaning is two or more.
- a Beidou communication system 10 provided in the embodiment of the present application is introduced below.
- Fig. 1 shows a schematic diagram of a Beidou communication system 10 provided in an embodiment of the present application.
- the Beidou communication system 10 may include a terminal 100 , a Beidou short message satellite 21 , a Beidou network device 200 , a short message center 25 and a terminal 300 .
- the Beidou communication system 10 may also include an emergency rescue platform 26 and an emergency rescue center 27 .
- the terminal 100 can send the short message information to the Beidou short message satellite 21, and the Beidou short message satellite 21 only relays and directly forwards the short message information sent by the terminal 100 to the Beidou network equipment 200 on the ground.
- the Beidou network device 200 can analyze the short message information forwarded by the satellite according to the Beidou communication protocol, and forward the content of the general message type parsed from the short message information to the short message center (short message service center, SMSC) 25.
- SMSC short message service center
- the short message center 25 can forward the content of the message to the terminal 300 through a traditional cellular communication network.
- the Beidou network device 200 can also send the emergency distress message sent by the terminal 100 to the emergency rescue center 27 through the emergency rescue platform 26.
- the terminal 300 can also send the short message to the short message center 25 through a traditional cellular communication network.
- the short message center 25 can forward the short message of the terminal 300 to the Beidou network device 200 .
- the Beidou network device 200 can relay the short message of the terminal 300 to the terminal 100 through the Beidou short message satellite 21 .
- the above-mentioned Beidou network equipment 200 may include a Beidou ground transceiver station 22 , a Beidou central station 23 and a Beidou short message integrated communication platform 24 .
- the Beidou ground transceiver station 22 may include one or more devices with a sending function and one or more devices with a receiving function, or may include one or more devices with a sending function and a receiving function, which is not limited herein .
- the Beidou ground transceiver station 22 can be used for the data processing function of the Beidou network equipment 200 in the physical layer (physical layer protocol, PHY).
- the Beidou central station 23 can be used for the Beidou network device 200 to process data at the satellite link control layer (satellite link control protocol, SLC) layer and the message convergence layer (message data convergence protocol, MDCP).
- the Beidou short message fusion communication platform 24 can be used to process data at the application layer (application layer protocol, APP).
- the Beidou communication system 10 since the Beidou communication system 10 communicates through satellite links, its main characteristics are: time extension (about 270 ms in one direction) and large link loss.
- the services currently supported by the Beidou communication system 10 are mainly burst short message services, and do not support link state management, mobility management, and broadcast control information.
- the working mode of the Beidou network device 200 may be a duplex mode, and data may be sent and received at the same time.
- the Beidou network device 200 can send data to the terminal 100 through the Beidou short message satellite 21 .
- the outbound service packet of the Beidou network device 200 needs to be divided into multiple physical layer frames for transmission.
- the civil terminal for example, terminal 300 in FIG. 1
- there are various types of services for example, short message, large amount of text information, picture information, voice information, etc.
- Different business types have different requirements for the underlying packet transmission mode of Beidou network equipment.
- the embodiment of the present application provides a method for outbound transmission control in the Beidou communication system.
- the Beidou network device 200 can split the application layer message into multiple protocol data units (protocol data unit, PDU) at the MDCP layer, which can be called It is an MDCP PDU.
- the MDCP PDU can contain a successor indication field, where the successor indication field can be used for the current MDCP PDU to be the initial MDCP PDU or the middle MDCP PDU or the last MDCP PDU of multiple MDCP PDUs sent continuously; or an MDCP PDU sent separately PDUs.
- the Beidou network device 200 can sequentially deliver MDCP PDUs to the SLC layer as service data units (service data units, SDUs) of the SLC layer, which can be called SLC SDUs, and split the SLC SDUs into N SLC PDUs at the SLC layer.
- SLC PDUs in various formats are provided to meet different business needs.
- the PHY layer can obtain SLC PDUs of one user or multiple users from the SLC layer.
- the PHY will splice the SLC PDUs of multiple users or one user together to form outbound data of a fixed-length physical time slot.
- Beidou network device 200 can send outbound data to one or more terminals.
- Beidou network device 200 can realize multi-frame (one physical time slot can contain multiple user frames) transmission, which can meet the needs of outbound data of different business types, and can optimize outbound resource configuration and improve outbound resource allocation. utilization rate.
- Fig. 2 shows a data outbound transmission process in a Beidou communication system provided by an embodiment of the present application.
- outbound data may refer to the BDS network device 200 sending data to the terminal 100 .
- the Beidou short message integrated communication platform 24 in the Beidou network device 200 can send outbound data to the Beidou central station 23; then the Beidou central station 23 can send the outbound data to the Beidou ground transceiver station 22, and the The message is sent to the terminal 100 after being relayed by the satellite 21 .
- the terminal 100 may return an acknowledgment character (acknowledge character, ACK) of the SLC layer to the Beidou central station 23.
- the ACK can be used for whether the terminal 100 successfully receives the outbound data sent by the Beidou network device 200.
- a protocol encapsulation framework for outbound data of the Beidou communication system 10 provided in the embodiment of the present application is introduced below.
- FIG. 3 shows a schematic diagram of a protocol encapsulation architecture of outbound data of the Beidou communication system 10 provided in the embodiment of the present application.
- the Beidou short message transmission protocol layer in the Beidou network device 200 can be an application layer protocol, a message convergence layer (message data convergence protocol, MDCP), a satellite link control layer (satellite link control protocol) , SLC) and physical layer (physical layer protocol, PHY).
- the Beidou network device 200 may include a Beidou ground transceiver station 22 , a Beidou central station 23 and a Beidou short message integrated communication platform 24 .
- the Beidou ground transceiver station 22 can be used to be responsible for the protocol processing of the PHY layer.
- the Beidou central station 23 can be used to be responsible for the protocol processing of the SLC layer and the MDCP layer.
- the Beidou short message fusion communication platform 24 can be used to be responsible for the protocol processing of the APP layer.
- the workflow of the Beidou short message transmission protocol in the Beidou network device 200 can be as follows:
- the Beidou network device 200 can compress the original data into compressed data through a compression algorithm, and add a compression indication field in front of the compressed data, where the compression indication field can be used to indicate the compression algorithm type of the compressed data. Afterwards, the Beidou network device 200 can encrypt the compressed data to obtain encrypted data, and add an encryption algorithm field to the header of the encrypted data, and the encryption algorithm field is used to indicate the encryption algorithm type of the encrypted data. The Beidou network device 200 can encapsulate the encrypted data, the compressed indication field, and the encrypted indication field into an application layer message and send it to the MDCP layer.
- the application layer message may include a message header and message data.
- the packet header may include a compression indication field, an encryption indication field, and the like.
- the message data includes the above-mentioned encrypted data.
- the Beidou network device 200 may also encrypt the compression indication field and the compressed data together to obtain encrypted data.
- the Beidou network device 200 can obtain the application layer message sent by the APP layer through the interlayer interface, and use the application layer message as an MDCP SDU.
- Beidou network device 200 can split an MDCP SDU into one or more fixed-length MDCP segment data (M_segement), and add a follow-up indication field to the header of each MDCP segment data to obtain an MDCP PDU , that is, the MDCP PDU includes M_segment and successor indication fields.
- M_segement fixed-length MDCP segment data
- the follow-up indication field can be used to indicate that the current MDCP PDU is the initial MDCP PDU or the middle MDCP PDU or the last MDCP PDU of multiple MDCP PDUs sent continuously; or it is an MDCP PDU sent separately.
- the Beidou network device 200 can obtain the MDCP PDU sent by the MDCP layer through the interlayer interface as the SLC SDU.
- the Beidou network device 200 can segment the SLC SDU into one or more (up to 4) fixed-length SLC segment data (S_segement), and add frame header information to each S_segment header to obtain the SLC PDU .
- the SLC layer needs to segment the data.
- one SLC SDU can only be divided into 4 SLC PDUs at most, so the MDCP layer also needs to segment the data.
- the Beidou network device 200 can obtain the SLC PDU delivered by the SLC layer through the interlayer interface.
- the Beidou network device 200 can obtain the SLC PDUs of one user or multiple users from the SLC layer.
- the Beidou network device 200 can splice the SLC PDUs of multiple users together, add the frame header of the physical frame (such as the version number) as the code block (code block) of the PHY layer, and add a check digit at the end of the code block (for example, cyclic redundancy check (cyclic redundancy check, CRC) code), and encode the code block and CRC code (for example, polar encoding), the encoded physical frame plus the reserved segment can form a fixed-length physical time
- the coded data of the message branch (S2C_d branch) of the slot can form a fixed-length physical time
- the coded data of the message branch (S2C_d branch) of the slot can form a fixed-length physical time
- the Beidou network device 200 can put multiple SLC PDUs of a user into different physical frames respectively. Then, the Beidou network device 200 composes the coded data of the S2C_d branch and the pilot information of the pilot branch (S2C_p branch) into pilot coded data, that is, outbound data. The Beidou network device 200 can send the outbound data to the Beidou short message satellite 21 , and forward it to the terminal 100 via the Beidou short message satellite 21 .
- the pilot information of the S2C_p branch is related to the satellite beam.
- the pilot information of the S2C_p branch is also known and does not need to be decoded.
- the coded data of the S2C_d branch needs to be decoded.
- a protocol analysis framework for outbound data of the Beidou communication system 10 provided in the embodiment of the present application is introduced below.
- Fig. 4 shows a schematic diagram of a protocol analysis architecture of outbound data of the Beidou communication system 10 provided in the embodiment of the present application.
- the Beidou short message transmission protocol layer of terminal 100 can be divided into application layer protocol (application layer protocol), message convergence layer (message data convergence protocol, MDCP), satellite link control layer (satellite link control protocol, SLC) and physical layer (physical layer protocol, PHY).
- application layer protocol application layer protocol
- message convergence layer messages data convergence protocol
- satellite link control layer satellite link control protocol
- physical layer physical layer protocol, PHY.
- the workflow of the Beidou short message transmission protocol layer of the terminal 100 can be as follows:
- the terminal 100 can obtain the modulated and spread-spectrum coded pilot data sent by the Beidou network device 200 .
- the terminal 100 may despread the received spread spectrum modulated data (spread+modulated data) to obtain modulated data (modulated data). Then, the terminal 100 may demodulate the modulated data to obtain pilot coded data (pilot+data). Next, the terminal 100 may remove the pilot information in the pilot coded data to obtain coded data (code data). Then, the terminal 100 can decode the coded data, and verify the integrity of the code block (code block) through the check data in the check bit field. If it is complete, the terminal 100 can extract the code block (code block), and present it to the SLC layer through the interlayer interface as the SLC PDU of the SLC layer.
- the pilot coded data is the outbound data sent by the Beidou network device 200, and the outbound data is composed of the coded data of the S2C_d branch and the pilot information of the pilot branch (S2C_p branch).
- the terminal 100 can splice the SLC PDUs belonging to the same SLC SDU into one SLC SDU based on the frame header information of the SLC PDU.
- the terminal 100 can present the SLC SDU to the MDCP layer through the interlayer interface as the MDCP PDU of the MDCP layer.
- the terminal 100 can splice all MDCP PDUs belonging to the same MDCP SDU into one MDCP SDU.
- the terminal 100 can present the MDCP SDU to the APP layer through the interlayer interface as an application layer message received by the APP layer.
- the terminal 100 may decrypt and decompress the application layer message based on the message header of the application layer message to obtain original data.
- FIG. 5 shows a data format of outbound data provided by the embodiment of the present application.
- the outbound data is pilot coded data of the physical layer.
- the pilot coding data may include pilot data of the S2C_p branch (pilot branch) and data of the S2C_d branch (text branch).
- the pilot data of the S2C_p branch is used to assist the terminal to parse out the user frame in the text branch.
- the S2C_d branch may include data (user frames) sent by the station side to multiple terminals, as well as reserved fields, rate indication fields, and CRC check code fields.
- the terminal 100 can obtain the data sent to the terminal 100 from the station side from the S2C_d branch. In short, the terminal 100 can search for the S2C_p branch, and then demodulate the S2C_d branch through the S2C_p branch. After receiving the outbound data, the terminal 100 can parse the user frame data in the S2C_d branch into an SLC PDU of the SLC layer (which may be called an SLC frame or a user frame).
- an SLC PDU of the SLC layer which may be called an SLC frame or a user frame.
- the SLC PDU may include a user frame header field and a user information field.
- the user frame header field may include a start identification field, a frame length field, and a user ID field.
- the user information field may include a user frame type field and a user text field.
- the start identification field is used to identify the start part of the user frame, and the length of the start identification field may be 8 bits.
- the frame length field is used to identify the length of the user frame, and the length of the frame length field can be 8 bits or 9 bits.
- the user ID field is used to indicate the terminal equipment receiving the user frame, and the length of the user ID field may be 44 bits. It can be understood that the embodiment of the present application does not limit the lengths of the start identification field, the frame length field, and the user ID field.
- the terminal 100 can combine one or more SLC PDUs in the SLC layer into SLC SDU packets, and then transmitted to the MDCP layer for analysis. If the user ID field in the SLC PDU analyzed by the terminal 100 from the user frame data in the S2C_d branch is not the same as the user ID of the terminal, the terminal 100 can discard the SLC PDU.
- the user message field may contain specific content sent from the station side to the terminal.
- the content may be an overview of the mailbox of the terminal, a letter message, or an ACK frame or a NACK frame, etc., which is not limited here.
- the user frame type field may be used to indicate the type of the user frame, and the length of the user frame type field may be 2 bits. It can be understood that the embodiment of the present application does not limit the length of the user frame type field.
- the service type indicated by the user frame type field may be shown in Table 1 below.
- the user frame type field of the user frame is "00", it indicates that the user frame is a general data frame; when the user frame type field of the user frame is "01”, it indicates that the user frame is an ACK frame ; When the user frame type field of the user frame is "10”, it indicates that the user frame is a receipt frame.
- the user frame type field "11" is a reserved field.
- the terminal 100 can blindly decode the received physical frame, it is not necessary to design the rate indication field, saving bits of this field.
- a field is required to indicate different versions of the protocol. Therefore, an alternative data format for outbound data is provided.
- FIG. 6 shows another data format of outbound data provided by the embodiment of the present application.
- the outbound data is pilot coded data of the physical layer.
- the pilot encoded data may include pilot data of the S2C_p branch (pilot branch) and data of the S2C_d branch (data branch).
- the pilot data of the S2C_p branch is used to assist the terminal in analyzing the user frames in the data branch.
- the S2C_d branch may include data (user frames) sent by the station side to multiple terminals, as well as reserved fields, version number fields, and CRC check code fields.
- the version number field may be 3 bits, and the embodiment of the present application does not limit the length of the version number field.
- the terminal 100 can obtain the data sent to the terminal 100 from the station side from the S2C_d branch. In short, the terminal 100 can search for the S2C_p branch, and then demodulate the S2C_d branch through the S2C_p branch. After receiving the outbound data, the terminal 100 can parse the user frame data in the S2C_d branch into an SLC PDU of the SLC layer (which may be called an SLC frame or a user frame).
- an SLC PDU of the SLC layer which may be called an SLC frame or a user frame.
- the SLC PDU may include a user frame header field and a user information field.
- frame formats of four types of SLC PDUs are provided.
- the frame formats of the SLC frames are also different. Specifically, reference may be made to the description below, and details will not be repeated here.
- FIG. 7A shows a frame format of a type of SLC frame provided by the embodiment of the present application.
- the SLC frame may be a general data frame of 2K rate.
- the general data frame of the 2K rate can be used for mailbox profile query and letter message sending.
- the SLC frame that the Beidou network device 200 replies to the terminal 100 may be a general data frame at a rate of 2K.
- the general data at the 2K rate may include a single user frame header and user information.
- the single user frame header of the user frame may include a frame type field, an acknowledgment mode enable (acknowledge mode enable, AM enable) field, a frame length field, a user ID field, a frame total number field and a frame sequence number field.
- the frame type field may be used to indicate the type of the SLC frame.
- the length of the frame type field may be 2 bits. The embodiment of the present application does not limit the length of the frame type field.
- the AM enable field indicates whether the terminal receiving the SLC frame needs to reply ACK to the Beidou network device 200.
- the length of the AM enable field may be 1 bit. If the value in the AM enable field is the first value (for example: 1), it indicates that the terminal 100 needs to reply ACK to the Beidou network device 200 after receiving the user frame. If the value in the AM enable field is the second value (for example: 0), it indicates that the terminal 100 does not need to reply ACK to the Beidou network device 200 after receiving the SLC frame.
- the embodiment of the present application does not limit the length of the AM enable field and the specific value of the AM enable field.
- the value in the AM enable field is the first value, that is, the mode in which the terminal 100 needs to reply an ACK to the Beidou network device 200 after receiving the user frame, it can be called an acknowledgment mode ( acknowledgment mode, AM mode for short).
- the value in the AM enable field is the second value, that is, the mode in which the terminal does not need to reply ACK to the Beidou network device 200 after receiving the SLC frame, can be called an unacknowledge mode (UM mode for short).
- the frame length field is used to identify the length of the SLC frame, and the length of the frame length field may be 8 bits.
- the embodiment of the present application does not limit the length of the frame length field.
- the user ID field may indicate that the SLC frame is sent by the Beidou network device 200 to the first terminal, and the ID of the first terminal is the same as the ID shown in the user ID field.
- the length of the user ID field may be 44 bits. The embodiment of the present application does not limit the length of the user ID field.
- the total number of frames field is used to indicate the number of SLC frames sent by the Beidou network device 200 to a single user terminal.
- the length of the frame total number field may be 2 bits. The embodiment of the present application does not limit the length of the total number of frames field.
- the frame sequence number field is used to indicate that the SLC frame is the Nth frame among all SLC frames sent by the Beidou network device 200 to the terminal of a single user.
- the value of N is the value described in the specific content of the frame number field.
- the length of the frame sequence number field may be 2 bits. The embodiment of the present application does not limit the length of the user ID field.
- the format of a single user frame header in the SLC frame shown in FIG. 7A is only an example.
- the embodiment of the present application does not limit the order of the fields in the single user frame header and the number of fields contained in the single user frame header.
- FIG. 7B shows a frame format of another type of SLC frame provided by the embodiment of the present application.
- the SLC frame is a general data frame of 4K rate.
- the general data frame at the 4K rate may include a single user frame header and user information.
- the single user frame header of the user frame can include frame type field, AM enable (open AM mode) field, frame length field, user ID field, frame total number field and frame sequence number field.
- the frame type field may be used to indicate the type of the user frame.
- the length of the frame type field may be 2 bits.
- the AM enable field indicates whether the terminal receiving the SLC frame needs to reply ACK to the Beidou network device 200.
- the length of the AM enable field may be 1 bit. If the value in the AM enable field is D1 (for example: binary value 1), it indicates that the terminal needs to reply ACK to the Beidou network device 200 after receiving the user frame. If the value in the AM enable field is D2 (for example: binary value 0), it indicates that the terminal does not need to reply ACK to the Beidou network device 200 after receiving the SLC frame.
- D1 for example: binary value 1
- D2 for example: binary value 0
- the embodiment of the present application does not limit the length of the AM enable field and the specific value of the AM enable field.
- the frame length field is used to identify the length of the SLC frame, and the length of the frame length field is determined by a physical layer decoding parameter (ie, decoding rate).
- a physical layer decoding parameter ie, decoding rate
- the length of the frame length field may be 9 bits.
- the embodiment of the present application does not limit the length of the frame length field.
- the user ID field may indicate that the SLC frame is sent by the Beidou network device 200 to the first terminal, and the ID of the first terminal is the same as the ID shown in the user ID field.
- the length of the user ID field may be 44 bits. The embodiment of the present application does not limit the length of the user ID field.
- the total number of frames field is used to indicate the number of SLC frames sent by the Beidou network device 200 to a single user terminal.
- the length of the frame total number field may be 2 bits. The embodiment of the present application does not limit the length of the total number of frames field.
- the frame sequence number field is used to indicate that the SLC frame is the Nth frame among all user frames sent by the Beidou network device 200 to the terminal 100 .
- the value of N is the value described in the specific content of the frame number field.
- the length of the frame sequence number field may be 2 bits. The embodiment of the present application does not limit the length of the user ID field.
- the format of a single user frame header in the SLC frame shown in FIG. 7B is only an example.
- the embodiment of the present application does not limit the order of the fields in the single user frame header and the number of fields contained in the single user frame header.
- the first field in the single user frame header can be any one of the frame type field, AM enable (open AM mode) field, frame length field, user ID field, frame total number field and frame sequence number field.
- the terminal can blindly decode the received SLC frame, that is, the terminal can use each rate that the terminal can parse to parse the SLC frame, if the terminal can parse the SLC frame at the first rate SLC frame, the rate of the SLC frame is the first rate. Then, the terminal can determine the length of the frame header information in the SLC frame according to the rate.
- FIG. 7C shows the frame format of another type of SLC frame provided by the embodiment of the present application.
- the SLC frame is an ACK frame, and the ACK frame is only used at the SLC layer.
- the ACK frame may include a single user frame header and user information.
- the length of the single user frame header may be 36 bits, and the length of the user information may be 4 bits.
- the embodiment of the present application does not limit the length of the single user frame and the length of the user information.
- the single user frame header may include a frame type field and a user ID field.
- a frame type field may be used to indicate the type of the SLC frame.
- the length of the frame type field may be 2 bits. The embodiment of the present application does not limit the length of the frame type field.
- the user ID field may indicate that the SLC frame is sent by the Beidou network device 200 to the first terminal, and the ID of the first terminal is the same as the ID shown in the user ID field.
- the length of the user ID field may be 44 bits. The embodiment of the present application does not limit the length of the user ID field.
- the user information may include an acknowledgment character bitmap ACK bitmap.
- the ACK bitmap is used to indicate whether the Beidou network device 200 has successfully received the SLC frame sent by the terminal 100 to the Beidou network device 200.
- the length of the ACK bitmap in the ACK frame sent by the Beidou network device 200 to the terminal 100 can be divided into the largest SLC PDU according to the SLC SDU sent by the terminal 100 to the Beidou network device 200 The number is determined. Since the maximum number of SLC PDUs that can be divided into one SLC SDU is fixed, the length of the ACK bitmap is also fixed. For example, the SLC SDU sent by the terminal 100 to the Beidou network device 200 can be divided into 4 SLC PDUs at most, and the length of the ACK bitmap can be 4 bits.
- the Nth bit in the ACK bitmap is the value D3 (for example: binary value 1), which indicates that the Beidou network device 200 has successfully received the terminal 100 sent to the Beidou network device 100 The Nth frame of .
- the user information of the SLC frame returned by the Beidou network device 200 to the terminal 100 may be an ACK bitmap of "1111". If the terminal 100 sends 4 SLC frames to the Beidou network device 200, the Beidou network device 200 only successfully receives the first SLC frame of the user's current SLC SDU, and the next three inbound SLC frames are not successfully received, then the Beidou network The user information of the SLC frame returned by the device 200 to the terminal 100 may be an ACK bitmap of "1000".
- the user information in the ACK frame can be designed as an ACK bitmap with a fixed length and very short content, so the ACK does not need to distinguish the rate.
- FIG. 7D shows the frame format of another type of SLC frame provided by the embodiment of the present application.
- the SLC frame may be an application layer receipt frame, which is translated into information 1 (for example, all 1 indication) at the SLC layer, and continues to be parsed at the application layer.
- the application layer receipt frame may include a single user frame header and user information.
- the terminal 100 can parse the single user frame header of the application layer receipt frame at the SLC layer.
- the user information in the application layer receipt frame can be parsed by the application layer.
- the length of the single user frame header may be 36 bits, and the length of the user information may be 4 bits. The embodiment of the present application does not limit the length of the single user frame and the length of the user information.
- a single user frame header may include a frame type field and a user ID field.
- a frame type field may be used to indicate the type of the user frame.
- the length of the frame type field may be 2 bits. The embodiment of the present application does not limit the length of the frame type field.
- the user ID field may indicate that the SLC frame is sent by the Beidou network device 200 to the first terminal, and the ID of the first terminal is the same as the ID shown in the user ID field.
- the length of the user ID field may be 44 bits. The embodiment of the present application does not limit the length of the user ID field.
- the user information may be an Error code field, and the Error code field may be parsed by the application layer.
- the length of the Error code field can be 4 bits. The embodiment of this application does not limit the length of the Error code field.
- the following describes the transmission mechanism of the SLC layer when data is outbound in the Beidou communication system 10 provided in the embodiment of the present application.
- the Beidou network device 200 does not have the functions of reclaiming outbound resources and reallocating them. That is, the Beidou network device 200 reclaims the resources allocated to each SLC PDU in an SLC SDU, and redistributes them to the SLC SDUs sent by the Beidou network device 200 to other users.
- the Beidou network device 200 sends the SLC PDU in one SLC SDU to the terminal 100.
- the terminal 100 receives the first SLC PDU, it starts to calculate the maximum waiting time for the terminal 100 to receive the SLC PDU in the SLC SDU, that is, the time window length for the terminal 100 to receive the SLC PDU.
- Beidou network device 200 sends the last frame of SLC PDU in an SLC SDU, Beidou network device 200 can calculate the maximum waiting time for Beidou network device 200 to receive the ACK replied by the terminal, that is, the duration window for Beidou network device 200 to receive the ACK length.
- the terminal 100 When the terminal 100 successfully receives the SLC SDU sent by the Beidou network device 200, it can send an ACK to the Beidou network device 200. When the terminal 100 fails to receive the SLC SDU sent by the Beidou network device 200, it does not reply NACK to the Beidou network device 200.
- the terminal 100 successfully receiving the SLC SDU sent by the Beidou network device 200 may refer to: the terminal 100 has received all the SLC PDUs in the SLC SDU sent by the Beidou network device 200, and can correctly parse out the SLC SDU in the SLC SDU. All SLC PDUs.
- the failure of the terminal 100 to receive the SLC SDU sent by the Beidou network device 200 may refer to: the terminal 100 has not received all the SLC PDUs in the SLC SDU sent by the Beidou network device 200, or failed to correctly parse the SLC SDU. All SLC PDUs in the SLC SDU.
- the character returned by the terminal 100 can be referred to as ACK for short.
- the character can be referred to simply as NACK.
- the terminal 100 does not need to report to The Beidou network device 200 replies with ACK or NACK.
- FIG. 8A shows a schematic diagram of a transmission success scenario of an SLC layer transmission mechanism when data is outbound provided in an embodiment of the present application.
- the communication interaction process of the Beidou communication system 10 at the SLC layer can be as follows:
- the Beidou network device 200 can send N SLC PDUs among the SLC SDUs at equal intervals in the order of frame sequence numbers from small to large.
- N ⁇ M M is the maximum number of segments of SLC SDU.
- M is 4 as an example for illustration.
- the terminal 100 after the terminal 100 receives the first SLC PDU sent by the Beidou network device 200, it starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window ), and feed back an ACK to the Beidou network device 200 after the SLC SDU receiving window ends.
- tUeRevWindow maximum waiting time
- the data part of the ACK may occupy 1 bit. Since the Beidou network device 200 does not have the retransmission function, the terminal 100 does not need to notify the Beidou network device 200 which SLC PDU has not been received, and the terminal 100 only needs to notify the Beidou network 200 of the success or failure of reception.
- the data part of the ACK may be character C1 or character C2.
- the character C1 can be used to indicate that the terminal 100 has successfully received an SLC SDU sent by the Beidou network device 200.
- the character C2 can be used to indicate that the terminal 100 has not successfully received an SLC SDU sent by the Beidou network device 200.
- the character C1 may be character 1
- the character C2 may be character 0.
- the Beidou network device 200 After sending the Nth SLC PDU, the Beidou network device 200 receives the ACK fed back by the terminal 100 within the ACK receiving window.
- tUeProcess refers to the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- the typical value of tUeProcess may be 60 ms as measured by experimental data.
- tPropagate refers to the air interface propagation delay between the terminal 100 and the Beidou network device 200 .
- the typical value of tPropagate may be 270 ms as measured by experimental data.
- tStationStartRcvAck refers to the start time when the Beidou network device 200 receives the ACK.
- tStationEndRcvAck refers to the end time when the Beidou network device 200 receives the ACK.
- tStationRevAckWindow refers to the length of the duration window for the Beidou network device 200 to receive the ACK.
- tUeRevWindow refers to the length of the time window for the terminal 100 to receive the SLC PDU, referred to as the SLC PDU receiving window.
- nUeRevFrameSN refers to the frame sequence number of the SLC PDU currently received by the terminal 100.
- the SLC SDU can include at most 4 frames of the SLC PDU, therefore, 0 ⁇ nStationRevFrameSN ⁇ 3, and nStationRevFrameSN is an integer.
- tStationFrameLen refers to the length of the SLC PDU sent by the Beidou network device 200.
- the value of tStationFrameLen may be 125ms.
- nStationTotalFrameNum refers to the total number of frames that the Beidou network device 200 divides the SLC SDU into segments, that is, the total number of frames including the SLC PDU in one SLC SDU.
- tStationTxInterval refers to the time interval for the Beidou network device 200 to send the SLC PDU.
- the sending interval (tStationTxInterval) of the SLC PDU may refer to the interval between the initial sending moments of two adjacent SLC PDUs.
- tStationTxInterval is a preset value, wherein, exemplary, a typical value of tStationTxInterval may be 2s.
- tUeSendAck refers to the time when the terminal 100 sends an ACK to the Beidou network device 200 .
- tStationTxEnd refers to the moment when the Beidou network device 200 sends the last SLC PDU.
- tUeUlFrameLen refers to the time length of the ACK sent by the terminal 100 . Among them, 128ms ⁇ tUeUlFrameLen ⁇ 512ms.
- ⁇ refers to the sending time alignment deviation of the outbound physical frame on the Beidou network device 200 .
- the Beidou network device 200 completes signal processing and scheduling, it may not be exactly at the sending time of the outbound physical frame, and it needs to wait for the sending time of the next outbound physical frame before sending the physical frame. Among them, 0 ⁇ 125ms.
- the terminal 100 determines the length of the SLC PDU receiving window in the embodiment of the present application, and how the Beidou network device 200 determines the start time of the ACK receiving window and the end time of the ACK window.
- the terminal 100 starts the session after receiving the first frame of the SLC SDU.
- the terminal 100 can determine the SLC PDU receiving window on the terminal 100 based on the frame sequence number of the currently received SLC PDU, the time length for the Beidou network device 200 to send the SLC PDU, the total number of frames of the SLC PDU in the current SLC SDU session, and the sending interval of the SLC PDU length of time.
- the terminal 100 can determine the time length of the SLC PDU receiving window through the following formula (1):
- tUeRevWindow is the time window length for the terminal 100 to receive the SLC PDU.
- nStationTotalFrameNum is the total number of SLC PDU frames in the current SLC SDU session.
- nStationRevFrameSN is the frame sequence number of the SLC PDU currently received by the terminal 100.
- tStationTxInterval is the SLC PDU sending interval on Beidou network device 200.
- nRevFrameSN ⁇ 0, 1, . . . , nStationTotalFrameNum-1 ⁇ .
- tStationFrameLen is the length of the SLC PDU sent by the Beidou network device 200.
- the length of tStationFrameLen is variable, and in the embodiment of the present application, the value of tStationFrameLen may be 125ms.
- ⁇ is the sending time alignment deviation of the outbound physical frame on the Beidou network device 200 .
- the value of ⁇ can take 125ms.
- the terminal 100 performs information processing and Ack_Bit information construction after the receiving window for the terminal 100 to receive the SLC PDU ends. Finally, the terminal 100 carries the Ack_Bit information in the ACK frame and sends it to the Beidou network device 200 .
- the terminal 100 can determine the time point of sending the ACK based on the length of the SLC PDU receiving window and the processing delay from receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- the terminal 100 can determine the time point of returning the ACK through the following formula (2):
- tUeSendAck is the time when the terminal 100 sends an ACK to the Beidou network device 200 .
- tUeRevWindow is the time window length for the terminal 100 to receive the SLC PDU.
- tUeProcess represents the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- the Beidou network device 200 can be based on the moment when the Beidou network device 200 has sent the last SLC PDU in the SLC SDU, the processing delay of the terminal 100 from receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK, and the terminal 100
- the air interface propagation delay with the Beidou network device 200 determines the starting moment when the Beidou network device 200 receives the ACK.
- the Beidou network device 200 can determine the starting time of receiving the ACK through the following formula (3):
- tStationStartRcvAck is the starting moment when the Beidou network device 200 receives the ACK
- tStationTxEnd is the moment when the Beidou network device 200 sends the last SLC PDU.
- tUeProcess is the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- tPropagate is the air interface propagation delay between the terminal 100 and the Beidou network device 200 .
- tUeProcess takes the minimum value of the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- the Beidou network device 200 can determine the moment when the Beidou network device 200 sends the last SLC PDU according to the total number of frames that the Beidou network device 200 divides the SLC SDU into segments and the time interval for the Beidou network device 200 to send the SLC PDU.
- the Beidou network device can determine the moment when the Beidou network device 200 sends the last SLC PDU through the following formula (4):
- tStationTxEnd (nStationTotalFrameNum-1)*(tStationTxInterval+tStationFrameLen)+ ⁇ formula (4)
- tStationTxEnd is the moment when the Beidou network device 200 sends the last SLC PDU.
- nStationTotalFrameNum is the total number of frames that the Beidou network device 200 segments the SLC SDU into.
- tStationTxInterval is the time interval for the Beidou network device 200 to send the SLC PDU.
- tStationFrameLen is the length of the SLC PDU sent by the Beidou network device 200.
- the length of tStationFrameLen is variable, and in the embodiment of the present application, the value of tStationFrameLen may be 125ms.
- ⁇ is the sending time alignment deviation of the outbound physical frame on the Beidou network device 200 . The value of ⁇ can take 125ms.
- the Beidou network device 200 can transmit the last SLC PDU according to the time when the Beidou network device 200 sends the last SLC PDU, the air interface propagation delay between the terminal 100 and the Beidou network device 200, and the terminal 100 from receiving the SLC PDU sent by the Beidou network device 200 to sending
- the processing delay of the ACK and the time length of the ACK sent by the terminal 100 determine the end time when the Beidou network device 200 receives the ACK.
- the Beidou network device 200 can determine the end time when the Beidou network device 200 receives the ACK through the following formula (5):
- tStationEndRcvAck is the end time when the Beidou network device 200 receives the ACK.
- tStationTxEnd is the moment when Beidou network device 200 sends the last SLC PDU.
- tUeProcess is the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- tPropagate is the air interface propagation delay between the terminal 100 and the Beidou network device 200 .
- tUeUlFrameLen is the time length of the ACK sent by the terminal 100 .
- tUeProcess takes the maximum value of the processing delay of the terminal 100 from receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- the terminal 100 has not received all the SLC PDUs in one SLC SDU sent by the Beidou network device 200.
- the terminal 100 does not feed back ACK information to the Beidou network device 200 .
- the Beidou network device 200 has not received the ACK fed back by the terminal 100 after the ACK receiving window expires (the ACK information has not been received after the time tStationEndRcvAck is reached), and the Beidou network device 200 ends the transmission of this SLC SDU.
- FIG. 8B shows a schematic diagram of a transmission failure scenario in the first transmission mechanism of the SLC layer when data is outbound provided in the embodiment of the present application.
- the terminal 100 has not received the last frame of SLC PDU in the SLC SDU sent by the Beidou network device 200.
- Terminal 100 does not reply ACK to Beidou network device 200 .
- the Beidou network device 200 does not receive the ACK fed back by the terminal 100 within the ACK receiving window, and the Beidou network device 200 ends the transmission of this SLC SDU.
- Beidou network equipment does not have the functions of reclaiming outbound resources and reallocating them.
- the terminal 100 calculates the receiving window for the terminal to receive the SLC SDU according to the maximum transmission time interval.
- the terminal 100 successfully receives the SLC SDU within the receiving window, it may not reply ACK to the Beidou network device 200.
- the terminal 100 fails to receive the SLC SDU within the receiving window, the terminal 100 may not reply a NACK to the Beidou network device 200.
- FIG. 9A shows a schematic diagram of a successful transmission scenario in the second transmission mechanism of the SLC layer when data is outbound provided in the embodiment of the present application.
- the Beidou network device 200 can send four SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window.
- tUeRevWindow the maximum waiting time
- FIG. 9B shows a schematic diagram of a transmission failure scenario in the second transmission mechanism of the SLC layer when data is outbound provided in the embodiment of the present application.
- the Beidou network device 200 sends the four SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window.
- Terminal 100 has not received the last frame of SLC PDU in one SLC SDU sent by Beidou network device 200.
- the terminal 100 may not reply NACK to the Beidou network device 200 .
- Beidou network equipment has the functions of recycling outbound resources and redistribution.
- the terminal 100 calculates the receiving window for the terminal to receive the SLC SDU according to the maximum transmission time interval.
- the terminal 100 successfully receives the SLC SDU within the receiving window, it can reply an ACK to the Beidou network device 200.
- the terminal 100 When the first frame received by the terminal 100 is not the first SLC PDU among the SLC SDUs sent by the Beidou network device 200, the terminal 100 immediately returns a NACK to the Beidou network device 200, and ends this reception.
- FIG. 10A shows a schematic diagram of a successful transmission scenario in the third transmission mechanism of the SLC layer when data is outbound provided in the embodiment of the present application.
- the Beidou network device 100 starts to calculate the receiving window of the ACK fed back by the receiving terminal 100 when it starts to send the first SLC PDU in the SLC SDU.
- the Beidou network device 200 can send the 4 SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window. After the terminal 100 successfully receives all the SLC PDUs in the SLC SDU within the time window tUeRevWindow, it returns an ACK to the Beidou network device 200.
- the Beidou network device 200 can start sending the first SLC PDU in an SLC SDU according to the time when the Beidou network device 200 starts to send the first SLC PDU in an SLC SDU, when the Beidou network device 200 finishes sending the SLC The moment of the last SLC PDU in the SDU, the processing delay from receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK by the terminal 100, and the air interface propagation delay between the terminal 100 and the Beidou network device 200 determine the Beidou network device 200 The start time of receiving ACK.
- the Beidou network device 200 can determine the starting time of receiving the ACK through the following formula (6):
- tStationStartRcvAck is the starting moment when the Beidou network device 200 receives the ACK
- tStationTxStart is the moment when the Beidou network device 200 starts sending the first SLC PDU in an SLC SDU
- tStationTxEnd is the moment when Beidou network device 200 sends the last SLC PDU.
- tUeProcess is the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- tPropagate is the air interface propagation delay between the terminal 100 and the Beidou network device 200 .
- the ACK returned by the terminal 100 to the Beidou network device 200 may be the first character, such as the character "1".
- FIG. 10B shows a schematic diagram of a successful transmission scenario in another SLC layer transmission mechanism 3 when data is outbound provided in the embodiment of the present application.
- the Beidou network device 100 starts to calculate the receiving window of the ACK fed back by the receiving terminal 100 after sending the first SLC PDU in the SLC SDU.
- the Beidou network device 200 can send the 4 SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window.
- the terminal 100 replies ACK to the Beidou network device 200.
- the Beidou network device 200 can start sending the first SLC PDU in an SLC SDU according to the time when the Beidou network device 200 starts to send the first SLC PDU in an SLC SDU, the output data sent by the Beidou network device 200 The length of the station frame, the moment when the Beidou network device 200 sends the last SLC PDU in the SLC SDU, the processing delay of the terminal 100 from receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK, and the distance between the terminal 100 and the Beidou network device 200 The air interface propagation delay determines the starting time when the Beidou network device 200 receives the ACK.
- the Beidou network device 200 can determine the starting time of receiving the ACK through the following formula (6):
- tStationStartRcvAck is the starting moment when the Beidou network device 200 receives the ACK
- tStationTxStart is the moment when the Beidou network device 200 starts sending the first SLC PDU in an SLC SDU
- tStationTxEnd is the moment when Beidou network device 200 sends the last SLC PDU.
- tUeProcess is the processing delay from the terminal 100 receiving the SLC PDU sent by the Beidou network device 200 to sending the ACK.
- tPropagate is the air interface propagation delay between the terminal 100 and the Beidou network device 200 .
- tStationFrameLen is the length of the SLC PDU sent by the Beidou network device 200, generally, tStationFrameLen is 125ms.
- FIG. 10C shows a schematic diagram of a transmission failure scenario in a third transmission mechanism of the SLC layer when data is outbound provided in an embodiment of the present application.
- the Beidou network device 100 starts to calculate the receiving window of the ACK fed back by the receiving terminal 100 after sending the first SLC PDU in the SLC SDU.
- the Beidou network device 200 can send the 4 SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- the Beidou network device 200 has sent the first SLC PDU (that is, the SLC PDU with the sequence number 0 in FIG. 10C ) and the second SLC PDU (that is, the SLC PDU with the sequence number 1 in FIG. 10C ).
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window.
- the terminal 100 has received the first SLC PDU sent by the Beidou network device 200.
- the first frame parsed by the terminal 100 is not the first SLC PDU in one SLC SDU sent by the Beidou network device 200.
- the terminal 100 directly replies NACK to the Beidou network equipment.
- the NACK may be used to indicate that the first frame parsed by the terminal 100 is not the first SLC PDU in one SLC SDU sent by the Beidou network device 200.
- the Beidou network device 200 may no longer send the unsent SLC PDUs among the SLC SDUs.
- the Beidou network device 200 can close the ACK receiving time window of the SLC SDU.
- the Beidou network device 200 has not sent the third SLC PDU (that is, the SLC PDU with the sequence number 2 in FIG. 10C ) and the fourth SLC PDU (that is, the SLC PDU with the sequence number 3 in FIG. 10C ).
- the Beidou network device 200 can allocate the resources of the unsent SLC PDUs among the sent SLC SDUs to the SLC SDUs that the Beidou network device 200 will send to other users.
- the Beidou network device 200 can allocate the resources of the third SLC PDU (that is, the SLC PDU with the serial number 2 in Figure 10C) and the fourth SLC PDU (that is, the SLC PDU with the serial number 3 in Figure 10C) to the Beidou network device 200 SLC SDUs to be sent to other users are used. In this way, the utilization rate of outbound resources of the BeiDou network device 200 can be improved.
- the terminal 100 can also enter the low power consumption process as soon as possible without waiting for other SLC PDUs in the SLC SDU.
- Beidou network equipment has the functions of recycling outbound resources and redistribution.
- the Beidou network device 200 sends the SLC SDU to the terminal 100
- the terminal 100 calculates the receiving window for the terminal to receive the SLC SDU according to the maximum transmission time interval.
- the terminal 100 successfully receives the SLC SDU within the receiving window, it can reply an ACK to the Beidou network device 200.
- Terminal 100 has not received the last frame of SLC PDU in one SLC SDU sent by Beidou network device 200. And the received first SLC PDU analyzed by the terminal 100 is not the first SLC PDU in a SLC SDU sent by the Beidou network device 200. The terminal 100 evaluates that the possibility of resource recovery by the Beidou network device 200 is low according to the number of received SLC PDUs, and does not reply NACK.
- the Beidou network device 200 does not receive the NACK fed back by the terminal 100 after the ACK receiving window expires (the NACK information has not been received after the time tStationEndRcvAck is reached), the Beidou network device 200 determines that the transmission of the SLC SDU has failed, and ends the transmission of the SLC SDU.
- the scenario of successful transmission in transmission mechanism 4 may be the same as the scenario of successful transmission in transmission mechanism 3.
- For the scenario of successful transmission in the fourth transmission mechanism reference may be made to the above description of FIG. 10A and FIG. 10B , which will not be repeated here.
- FIG. 11A shows a schematic diagram of a transmission failure scenario in a transmission mechanism 4 of an SLC layer when data is outbound provided in an embodiment of the present application.
- the Beidou network device 100 starts to calculate the receiving window of the ACK fed back by the receiving terminal 100 after sending the first SLC PDU in the SLC SDU.
- the Beidou network device 200 can send the 4 SLC PDUs in the SLC SDU at equal intervals in the order of frame sequence numbers from small to large.
- Beidou network device 200 has sent the first SLC PDU (that is, the SLC PDU with sequence number 0 in FIG. 10C ), the second SLC PDU (that is, the SLC PDU with sequence number 1 in FIG. 10C ) and the third SLC PDU (that is SLC PDU with sequence number 2 in Figure 10C).
- the terminal 100 After receiving the first SLC PDU sent by the Beidou network device 200, the terminal 100 starts the SLC layer receiving session (session) at time t0, and calculates the maximum waiting time (tUeRevWindow) for the terminal 100 to receive the outbound SLC SDU receiving window.
- the terminal 100 has received the first SLC PDU sent by the Beidou network device 200. However, the first frame parsed by the terminal 100 is not the first SLC PDU in one SLC SDU sent by the Beidou network device 200. Since the Beidou network device 200 has sent three SLC PDUs in one SLC SDU. The possibility that the terminal evaluates that the Beidou network card device 200 recovers resources is not high.
- the terminal 100 may not reply NACK to the Beidou network equipment.
- the Beidou network device 200 does not receive a NACK within the ACK receiving window, and ends this SLC SDU transmission.
- a method for controlling outbound transmission in the Beidou communication system provided in the embodiment of the present application is introduced below.
- FIG. 11B shows a schematic flowchart of a method for controlling outbound transmission in the Beidou communication system provided in the embodiment of the present application.
- the outbound transmission control method in the Beidou communication system includes the following steps:
- the Beidou network device 200 generates a first user frame to be sent to the first terminal and a second user frame to be sent to the second terminal at the satellite link control layer SLC.
- the frame header information of the first user frame includes a first user ID field and a first frame type field; the first user ID field is used to indicate the terminal receiving the first user frame; the first user ID field includes the first terminal ID information; the first frame type field is used to indicate the frame type of the first user frame; the frame header information of the second user frame includes a second user ID field and a second frame type field; the second user ID field is used to indicate receiving the second user frame
- the terminal of the second user frame; the second user ID field includes ID information of the second terminal; the second frame type field is used to indicate the frame type of the second user frame.
- the first user frame includes a satellite link control layer protocol data unit SLC PDU and an acknowledgment character ACK frame, and an application layer receipt frame.
- the SLC PDU can be used to transmit data
- the confirmation character ACK frame can be used to indicate whether the Beidou network equipment has successfully received the SLC PDU of the terminal.
- the application layer receipt frame is used to indicate whether the Beidou network equipment successfully parses the received application layer message.
- the Beidou network device 200 generates a first physical frame based on the first user frame and the second user frame at the physical PHY layer.
- the Beidou network device 200 sends the first physical frame to the terminal 100.
- the terminal 100 receives the first physical frame.
- the terminal 100 parses out the first user frame from the first physical frame.
- the first user frame is the first satellite link control layer protocol data unit SLC PDU in the first satellite link control layer service data unit SLC SDU, and the frame header information of the first user frame is also Including the confirmation mode enabling AM enable field, frame total number field, and frame sequence number field; among them, the AM enable field is used to indicate that the first terminal responds to ACK or not to reply ACK; the frame total number field is used to indicate the Beidou network equipment sends to the first terminal The number of SLC PDUs; the frame sequence number field is used to indicate the sequence number of the SLC PDU sent by the Beidou network device 200.
- the AM enable field of the first SLC PDU is the first value, and the first value is used to indicate that the first terminal does not reply ACK.
- the AM enable field of the first SLC PDU is a second value, and the second value is used to indicate that the first terminal replies with an ACK.
- the device receiving the first SLC PDU can know whether it needs to reply ACK through the frame header information, and does not need to know whether it needs to reply ACK through separate signaling interaction.
- the first user frame is the first SLC PDU
- the method further includes: the Beidou network device 200 continues to send one of the first SLC SDUs or multiple SLC PDUs; after the Beidou network device 200 has sent all the SLC PDUs in the first SLC SDU, the Beidou network device 200 receives the first ACK sent by the first terminal, and the first ACK is used to indicate that the first terminal has successfully received All SLC PDUs in the first SLC SDU.
- the Beidou network device 200 can know through the ACK returned by the first terminal that the first terminal has successfully received the SLC SDU. In this way, the Beidou network device 200 continues to send the next SLC SDU.
- the first user frame is the first SLC PDU
- the method further includes: after the Beidou network device 200 sends the first SLC PDU, the Beidou network device 200 receives the second ACK sent by the first terminal, and the second ACK is used to indicate that the first terminal has not successfully received the first SLC PDU; Beidou network device 200 allocates resources of one or more SLC PDUs in the first SLC SDU to One or more SLC PDUs in the second SDU sent to the second terminal. In this way, resources of the Beidou network device 200 can be saved, and resources can be recycled.
- the first user frame is the first SLC PDU
- the method further includes: the Beidou network device 200 continues to send one or more of the first SLC SDUs SLC PDU; after the Beidou network device 200 has sent all the SLC PDUs in the first SLC SDU, the Beidou network device 200 receives the third ACK sent by the first terminal, and the third ACK indicates that the first terminal failed to receive the first SLC All SLC PDUs in the SDU.
- the Beidou network device 200 can determine the next operation according to the ACK replied by the first terminal, for example, end this sending.
- the frame header information of the first physical frame includes a rate indication field or a version number field; wherein, the rate indication field is used to indicate the transmission rate of the first physical frame; the version number field is used to indicate Current version information of the first physical frame.
- the device receiving the physical frame can know the rate and version information of the physical frame.
- the first user frame is the first SLC PDU
- the Beidou network device 200 generates the first user frame sent to the first terminal at the satellite link control layer SLC, and the first user frame sent to the second terminal.
- the method also includes: the Beidou network device 200 acquires the message data of the Beidou network device 200 at the satellite link control SLC layer and aggregates multiple satellite link control layer service data units SLC SDUs delivered by the MDCP layer, wherein , the multiple SLC SDUs include the first SLC SDU; the Beidou network device 200 splits the first SLC SDU into N SLC PDUs at the SLC layer.
- the method further includes: the Beidou network device 200 at the MDCP layer
- the application layer message sent by the application layer of the Beidou network device 200 is obtained; the Beidou network device 200 uses the application layer message as the MDCP SDU at the MDCP layer, and after adding the padding data and the redundant length indication field to the MDCP SDU, Split into multiple MDCP PDUs; among them, the redundant length indication field is used to indicate the data length of the padding data, the multiple MDCP PDUs include the first MDCP PDU, the header information of the first MDCP PDU includes the successor indication field, and the successor indication field It is used to indicate the order of the first MDCP PDU in multiple MDCP PDUs; Beidou network device 200 sends multiple MDCP PDUs from the MDCP layer to the SLC layer as multiple SLC SDUs of the SLC layer.
- the method further includes: the Beidou network device 200 obtains the original data; the Beidou network device 200 compresses the original data at the application layer to obtain compressed data; the Beidou network device 200 encrypts the compressed data at the application layer to obtain encrypted data; the Beidou network device 200 adds message header information to the encrypted data header, Obtain the application layer message; wherein, the message header information includes a compression indication field and an encryption indication field, the compression indication field is used to indicate the compression algorithm used when compressing the original data, and the encryption indication field is used to indicate the compression algorithm used when encrypting the compressed data Encryption Algorithm.
- the Beidou network device 200 splits the first SLC SDU into N SLC PDUs at the SLC layer, specifically including: Beidou network device 200 splits the first SLC PDU and the second SLC PDU in the N SLC PDUs
- the SLC PDU is delivered to the PHY layer; the Beidou network device 200 generates the first physical frame from the first SLC PDU at the PHY layer, and generates the second physical frame from the second SLC PUD; the Beidou network device 200 sends the first physical frame and the second physical frame frame.
- the Beidou network device 200 sending the first physical frame includes: the Beidou network device 200 adds the first check bit information at the end of the first physical frame at the PHY layer, and adds the first physical frame
- the frame and the first parity bit information are encoded to obtain the first coded data;
- the Beidou network device 200 modulates the first coded data and the first reserved field of the first coded data at the PHY layer to obtain the first modulated data;
- the Beidou network device 200 The first spread spectrum modulation data is spread at the PHY layer to obtain the first spread spectrum modulation data;
- the Beidou network device 200 sends the first spread spectrum modulation data and the first pilot information of the first spread spectrum modulation data at the PHY layer.
- the method may further include: the Beidou network device 200 is based on the moment when the Beidou network device 200 finishes sending the last SLC PDU in the first SLC SDU, the first terminal receives the last SLC PDU in the first SLC SDU The processing delay from an SLC PDU to sending the ACK and the air interface propagation delay determine the starting moment of the ACK receiving time window; the Beidou network device 200 starts to receive the ACK at the starting moment of the ACK receiving time window.
- the Beidou network device 200 can determine the starting time of receiving the ACK.
- the method may further include: the Beidou network device 200 is based on the moment when the Beidou network device 200 finishes sending the last SLC PDU in the first SLC SDU, the first terminal receives the last SLC PDU in the first SLC SDU The processing delay from one SLC PDU to sending ACK, the time length of the ACK sent by the first terminal, and the air interface propagation delay determine the end moment of the ACK reception time window; the Beidou network device 200 at the end moment of the ACK reception time window Stop receiving ACKs.
- the Beidou network device 200 can determine the end time of receiving the ACK.
- the first user frame is the first satellite link control layer protocol data unit SLC PDU in the first satellite link control layer service data unit SLC SDU
- the frame header information of the first user frame is also Including acknowledgment mode enabling AM enable field, frame total number field, and frame sequence number field; among them, AM enable field is used to indicate terminal 100 to reply ACK or not to reply ACK; frame total number field is used to indicate the SLC PDU sent by Beidou network equipment to terminal 100 The number of frames; the frame sequence number field is used to indicate the sequence number of the SLC PDU sent by the Beidou network equipment.
- the AM enable field of the first SLC PDU is the first value, and the first value is used to indicate that the terminal 100 does not reply ACK.
- the AM enable field of the first SLC PDU is a second value, and the second value is used to instruct terminal 100 to reply ACK.
- the terminal 100 receiving the first SLC PDU can know whether it needs to reply ACK through the frame header information, and does not need to know whether it needs to reply ACK through separate signaling interaction.
- the first user frame is the first SLC PDU
- the terminal 100 parses the first user frame from the first physical frame
- the method further includes: the terminal 100 receives the first user frame One or more SLC PDUs in one SLC SDU; when the terminal 100 receives all the SLC PDUs in the first SLC SDU, the terminal 100 sends the first ACK to the Beidou network equipment, and the first ACK is used to indicate that the terminal 100 has successfully received the first SLC PDU All SLC PDUs in an SLC SDU.
- the value of the first ACK may be 1.
- the first user frame is the first SLC PDU in the first SLC SDU
- the terminal 100 parses the first user frame from the first physical frame, and after discarding the second user frame, the method further Including: when the first SLC PDU analyzed by the terminal 100 is not the first SLC PDU in the first SLC SDU; the terminal 100 sends the second ACK to the Beidou network device and stops receiving the second SLC PDU in the first SLC SDU, The second ACK is used to indicate that the terminal 100 has not successfully received the first SLC PDU.
- the first user frame is the first SLC PDU in the first SLC SDU
- the terminal 100 parses the first user frame from the first physical frame, and after discarding the second user frame, the method further Including: the terminal 100 receives one or more SLC PDUs in the first SLC SDU; when the terminal 100 fails to receive all the SLC PDUs in the first SLC SDU within the SLC PDU receiving time window, the terminal 100 sends a notification to the Beidou network equipment Sending a third ACK, where the third ACK is used to indicate that the terminal 100 has not successfully received all the SLC PDUs in the first SLC SDU.
- the first user frame is the first SLC PDU in the first SLC SDU
- the terminal 100 parses the first user frame from the first physical frame, and discards the second user frame.
- the frame includes: the terminal 100 acquires the first spread spectrum modulation data sent by the terminal at the PHY layer; the terminal 100 despreads the first spread spectrum modulation data at the PHY layer to obtain the first modulation data and the first Modulate the sync header; the terminal 100 demodulates the first modulated data and the first modulated sync header at the PHY layer to obtain the first pilot data and the first sync header; the terminal 100 removes the first pilot data at the PHY layer Pilot information to obtain the first coded data; Beidou network equipment decodes the first coded data at the PHY layer to obtain the physical frame of the first coded block and the first check information; the terminal 100 based on the first check information at the PHY layer
- the first coding block is verified, and after the verification is successful, the first user frame whose ID field in the first coding block is the same as
- the terminal 100 verifies the first coded block based on the first verification information at the PHY layer, and after the verification succeeds, combines the ID field in the first coded block with the ID field of the terminal 100.
- the method further includes: the terminal 100 will receive at the SLC layer M SLC PDUs are spliced into the first SLC SDU, and the first SLC SDU is reported as the first MDCP PDU of the MDCP layer from the SLC layer of the terminal 100 to the MDCP layer of the terminal 100, and the header information of the first MDCP PDU includes a follow-up indication Field, the successor indication field is used to indicate the order of the first MDCP PDU in multiple MDCP PDUs sent by Beidou network equipment.
- the method further includes: the terminal 100 obtains at the MDCP layer the second MDCP PDU reported from the terminal 100 SLC layer; when the second MDCP PDU indicates that the second MDCP PDU is a Beidou network When the last of multiple MDCP PDUs sent by the device, the terminal 100 splices the first MDCP PDU and the second MDCP PDU into an MDCP SDU at the MDCP layer, and reports the MDCP SDU as an application layer message from the MDCP layer to the application layer.
- the application layer message includes message header information and encrypted data
- the message header information includes an encryption indication field and a compression indication field
- the compression indication field is used to instruct the terminal to compress the original data into compressed data
- the method also includes: the terminal 100 uses the encryption algorithm indicated by the encryption indication field in the application layer message at the application layer , decrypting the encrypted data in the application layer message to obtain compressed data; at the application layer, the terminal 100 decompresses the compressed data through the compression algorithm indicated by the compression indication field in the application layer message to obtain the original data.
- the method further includes: the terminal 100 based on the frame sequence number of the received SLC PDU, the time length of the SLC PDU sent by the Beidou network device, and the frame of the SLC PDU in a SLC SDU sent by the Beidou network device The total number and the sending interval between the SLC PDUs determine the time length of the SLC PDU receiving window in the terminal 100.
- the method further includes: the terminal 100 based on the time length of the SLC PDU receiving window, the receiving moment of the first SLC PDU, the signal processing delay of the terminal 100, and the time length of the ACK sent by the terminal 100 , to determine the time point when the terminal 100 sends the ACK.
- the terminal 100 can refer to the above description for determining the time length of the SLC PDU receiving window and the time point for sending the ACK, and details will not be repeated here.
- the terminal 100 After receiving N SLC PDUs in one SLC SDU sent by the Beidou network device 200, the terminal 100 can determine the Beidou network device based on the AM enable field, the total number of frames field and the frame sequence number field of the frame header information in the received SLC PDU. 200 request to reply ACK, and use parallel confirmation mode to reply ACK. Therefore, after the receiving window of the SLC PDU ends, the terminal 100 generates an ACK based on the receiving results of the N SLC PDUs. And return the ACK to the Beidou network device 200.
- the ACK sent by the terminal 100 does not need to indicate the frame sequence number of the SLC PDU that has not been received, but only needs to notify the Beidou network equipment 200 to receive Collect all N SLC PDUs or not receive all N SLC PDUs. Therefore, the length of the Bitmap part of the ACK may be 1 bit, and the 1 bit is used to indicate whether the terminal 100 has received all the N SLC PDUs of the current SLC SDU.
- the Beidou network device 200 may also support data retransmission, and the ACK sent by the terminal 100 may also notify the Beidou network device 200 of the uncompleted frame numbers. Therefore, the length of the Bitmap part of the ACK can be Nbit, and the Nbit is used to indicate whether the terminal 100 has not received all the frame numbers of the N SLC PDUs in the current SLC SDU.
- the terminal 100 may start the SLC SDU session after receiving the first SLC SDU among the SLC SDUs.
- Terminal 100 can be based on the frame sequence number (nStationRevFrameSN) of the latest SLC PDU received, the moment of receiving the latest SLC PDU (tUeRevRctSP), the total number of SLC PDU frames in the SLC SDU (nStationTotalFrameNum), and the interval at which Beidou network equipment 200 sends SLC PDUs (tStationTxInterval) and the time length (tStationD1FrameLen) of the physical frame sent by the Beidou network equipment 200 determines the remaining time length (tUeRevWindow) of the SLC PDU receiving window on the terminal 100.
- nStationRevFrameSN the frame sequence number of the latest SLC PDU received
- tUeRevRctSP the moment of receiving the latest SLC PDU
- nStationTotalFrameNum the interval at
- the terminal 100 can determine the remaining time length (tUeRevWindow) of the SLC PDU receiving window by the following formula:
- the value of tStationTxInterval is preset on the terminal 100 .
- the above nStationRevFrameSN ⁇ 0, 1, . . . , nStationTotalFrameNum-1 ⁇ , the value of ⁇ may be 125ms.
- the terminal 100 After the receiving window of the SLC PDU ends, the terminal 100 generates an ACK based on the receiving results of the N SLC PDUs. And return the ACK to the Beidou network device 200.
- the terminal 100 can be based on the air interface propagation delay (tPropagate), the signal processing scheduling delay of the terminal 100 (tUeProcess), the switching time of the terminal 100 from the receiving state to the transmitting state (tRx2TxSwitch), and the receiving time when the terminal 100 receives the latest SLC PDU (tUeRevRctSP), determine the time point (tUeSendAck) at which the terminal 100 sends the ACK.
- tPropagate the air interface propagation delay
- tUeProcess the signal processing scheduling delay of the terminal 100
- tRx2TxSwitch the switching time of the terminal 100 from the receiving state to the transmitting state
- tUeRevRctSP the receiving time when the terminal 100 receives the latest SLC P
- the terminal 100 can determine the time point (tUeSendAck) when the terminal 100 sends the ACK through the following formula:
- ⁇ is the physical frame transmission time alignment deviation of the terminal 100 .
- the Beidou network device 200 can be based on the moment when the Beidou network device 200 sends the last SLC PDU in the SLC SDU (tStationTxEnd), the air interface propagation delay (tPropagate), the switching time from the receiving state to the sending state of the terminal 100 (tRx2TxSwitch), the terminal 100
- the signal processing scheduling delay (tUeProcess) determines the start time (tStationStartRcvAck) of the ACK reception window (tStationRevAckWindow) and the end time (tStationEndRcvAck) of the ACK reception window.
- the Beidou network device 200 can determine the start time (tStationStartRcvAck) of the ACK receiving window (tStationRevAckWindow) through the following formula:
- tUeProcess takes the minimum value t_MinUeProc.
- the Beidou network device 200 can determine the end time (tStationEndRcvAck) of the ACK receiving window (tStationRevAckWindow) through the following formula:
- tUeProcess can take the maximum value t_MaxUeProc.
- the exemplary terminal 100 provided by the embodiment of the present application is firstly introduced below.
- FIG. 12 is a schematic structural diagram of a terminal 100 provided by an embodiment of the present application.
- terminal 100 may have more or fewer components than shown in the figures, may combine two or more components, or may have a different configuration of components.
- the various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
- the terminal 100 may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194 and user An identification module (subscriber identification module, SIM) card interface 195 and the like.
- SIM subscriber identification module
- the sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, bone conduction sensor 180M, etc.
- the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the terminal 100 .
- the terminal 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components.
- the illustrated components can be realized in hardware, software or a combination of software and hardware.
- the processor 110 may include one or more processing units, for example: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU) wait. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.
- application processor application processor, AP
- modem processor graphics processing unit
- GPU graphics processing unit
- image signal processor image signal processor
- ISP image signal processor
- controller memory
- video codec digital signal processor
- DSP digital signal processor
- baseband processor baseband processor
- neural network processor neural-network processing unit, NPU
- the controller may be the nerve center and command center of the terminal 100 .
- the controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.
- a memory may also be provided in the processor 110 for storing instructions and data.
- the memory in processor 110 is a cache memory.
- the memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 110 is reduced, thereby improving the efficiency of the system.
- processor 110 may include one or more interfaces.
- the interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous transmitter (universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and /or universal serial bus (universal serial bus, USB) interface, etc.
- I2C integrated circuit
- I2S integrated circuit built-in audio
- PCM pulse code modulation
- PCM pulse code modulation
- UART universal asynchronous transmitter
- MIPI mobile industry processor interface
- GPIO general-purpose input and output
- subscriber identity module subscriber identity module
- SIM subscriber identity module
- USB universal serial bus
- the I2C interface is a bidirectional synchronous serial bus, including a serial data line (serial data line, SDA) and a serial clock line (derail clock line, SLC).
- processor 110 may include multiple sets of I2C buses.
- the processor 110 can be respectively coupled to the touch sensor 180K, the charger, the flashlight, the camera 193 and the like through different I2C bus interfaces.
- the processor 110 may be coupled to the touch sensor 180K through the I2C interface, so that the processor 110 and the touch sensor 180K communicate through the I2C bus interface to realize the touch function of the terminal 100 .
- the I2S interface can be used for audio communication.
- processor 110 may include multiple sets of I2S buses.
- the processor 110 may be coupled to the audio module 170 through an I2S bus to implement communication between the processor 110 and the audio module 170 .
- the audio module 170 can transmit audio signals to the wireless communication module 160 through the I2S interface, so as to realize the function of answering calls through the Bluetooth headset.
- the PCM interface can also be used for audio communication, sampling, quantizing and encoding the analog signal.
- the audio module 170 and the wireless communication module 160 may be coupled through a PCM bus interface.
- the audio module 170 can also transmit audio signals to the wireless communication module 160 through the PCM interface, so as to realize the function of answering calls through the Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.
- the UART interface is a universal serial data bus used for asynchronous communication.
- the bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication.
- a UART interface is generally used to connect the processor 110 and the wireless communication module 160 .
- the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to realize the Bluetooth function.
- the audio module 170 can transmit audio signals to the wireless communication module 160 through the UART interface, so as to realize the function of playing music through the Bluetooth headset.
- the MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193 .
- MIPI interface includes camera serial interface (camera serial interface, CSI), display serial interface (display serial interface, DSI), etc.
- the processor 110 communicates with the camera 193 through a CSI interface to realize the shooting function of the terminal 100 .
- the processor 110 communicates with the display screen 194 through the DSI interface to realize the display function of the terminal 100 .
- the GPIO interface can be configured by software.
- the GPIO interface can be configured as a control signal or as a data signal.
- the GPIO interface can be used to connect the processor 110 with the camera 193 , the display screen 194 , the wireless communication module 160 , the audio module 170 , the sensor module 180 and so on.
- the GPIO interface can also be configured as an I2C interface, I2S interface, UART interface, MIPI interface, etc.
- the SIM interface can be used to communicate with the SIM card interface 195 to realize the function of transmitting data to the SIM card or reading data in the SIM card.
- the USB interface 130 is an interface conforming to the USB standard specification, specifically, it can be a Mini USB interface, a Micro USB interface, a USB Type C interface, and the like.
- the USB interface 130 can be used to connect a charger to charge the terminal 100, and can also be used to transmit data between the terminal 100 and peripheral devices. It can also be used to connect headphones and play audio through them. This interface can also be used to connect other electronic devices, such as AR devices.
- the interface connection relationship between the modules shown in the embodiment of the present invention is only a schematic illustration, and does not constitute a structural limitation of the terminal 100 .
- the terminal 100 may also adopt different interface connection modes in the foregoing embodiments, or a combination of multiple interface connection modes.
- the charging management module 140 is configured to receive a charging input from a charger.
- the charger may be a wireless charger or a wired charger.
- the power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 .
- the power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the external memory, the display screen 194 , the camera 193 , and the wireless communication module 160 .
- the wireless communication function of the terminal 100 can be realized by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.
- Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
- Each antenna in terminal 100 may be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
- Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
- the antenna may be used in conjunction with a tuning switch.
- the mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied on the terminal 100 .
- the mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like.
- the mobile communication module 150 can receive electromagnetic waves through the antenna 1, filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation.
- the mobile communication module 150 can also amplify the signals modulated by the modem processor, and convert them into electromagnetic waves through the antenna 1 for radiation.
- at least part of the functional modules of the mobile communication module 150 may be set in the processor 110 .
- at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be set in the same device.
- a modem processor may include a modulator and a demodulator.
- the modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal.
- the demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator sends the demodulated low-frequency baseband signal to the baseband processor for processing.
- the low-frequency baseband signal is passed to the application processor after being processed by the baseband processor.
- the application processor outputs sound signals through audio equipment (not limited to speaker 170A, receiver 170B, etc.), or displays images or videos through display screen 194 .
- the modem processor may be a stand-alone device.
- the modem processor may be independent from the processor 110, and be set in the same device as the mobile communication module 150 or other functional modules.
- the wireless communication module 160 can provide wireless local area networks (wireless local area networks, WLAN) (such as wireless fidelity (Wi-Fi) network), bluetooth (bluetooth, BT), global navigation satellite system, etc. (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR), Beidou communication and other wireless communication solutions.
- the wireless communication module 160 may be one or more devices integrating at least one communication processing module.
- the wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 .
- the wireless communication module 160 can also receive the signal to be sent from the processor 110 , frequency-modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.
- the antenna 1 of the terminal 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the terminal 100 can communicate with the network and other devices through wireless communication technology.
- the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access, CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC , FM, and/or IR technology, and Beidou communication technology, etc.
- GSM global system for mobile communications
- general packet radio service general packet radio service
- CDMA code division multiple access
- WCDMA broadband Code division multiple access
- time division code division multiple access time-division code division multiple access
- TD-SCDMA time-division code division multiple access
- LTE long term evolution
- the GNSS may include a global positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a Beidou navigation satellite system (beidou navigation satellite system, BDS), a quasi-zenith satellite system (quasi -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).
- GPS global positioning system
- GLONASS global navigation satellite system
- Beidou navigation satellite system beidou navigation satellite system
- BDS Beidou navigation satellite system
- QZSS quasi-zenith satellite system
- SBAS satellite based augmentation systems
- the terminal 100 can communicate with the Beidou network device 200 through the Beidou communication technology.
- the Beidou communication technology may exist in an independent chip, or may be integrated in the wireless communication module 160 .
- the terminal 100 realizes the display function through the GPU, the display screen 194, and the application processor.
- the GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering.
- Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.
- the display screen 194 is used to display images, videos and the like.
- the display screen 194 includes a display panel.
- the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
- the terminal 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.
- the terminal 100 can realize the shooting function through the ISP, the camera 193 , the video codec, the GPU, the display screen 194 and the application processor.
- the ISP is used for processing the data fed back by the camera 193 .
- the light is transmitted to the photosensitive element of the camera through the lens, and the light signal is converted into an electrical signal, and the photosensitive element of the camera transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye.
- ISP can also perform algorithm optimization on image noise, brightness, and color.
- ISP can also optimize the exposure, color temperature and other parameters of the shooting scene.
- the ISP may be located in the camera 193 .
- Camera 193 is used to capture still images or video.
- the object generates an optical image through the lens and projects it to the photosensitive element.
- the photosensitive element may be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor.
- CMOS complementary metal-oxide-semiconductor
- the photosensitive element converts the light signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal.
- the ISP outputs the digital image signal to the DSP for processing.
- DSP converts digital image signals into standard RGB, YUV and other image signals.
- the terminal 100 may include 1 or N cameras 193, where N is a positive integer greater than 1.
- Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals. For example, when the terminal 100 selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point.
- Video codecs are used to compress or decompress digital video.
- Terminal 100 may support one or more video codecs.
- the terminal 100 can play or record videos in various encoding formats, for example: moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4, etc.
- the NPU is a neural-network (NN) computing processor.
- NN neural-network
- Applications such as intelligent cognition of the terminal 100 can be implemented through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.
- the internal memory 121 may include one or more random access memories (random access memory, RAM) and one or more non-volatile memories (non-volatile memory, NVM).
- RAM random access memory
- NVM non-volatile memory
- Random access memory can include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous dynamic random access memory, SDRAM), double data rate synchronous Dynamic random access memory (double data rate synchronous dynamic random access memory, DDR SDRAM, such as the fifth generation DDR SDRAM is generally called DDR5 SDRAM), etc.;
- Non-volatile memory may include magnetic disk storage devices, flash memory (flash memory).
- flash memory can include NOR FLASH, NAND FLASH, 3D NAND FLASH, etc.
- it can include single-level storage cells (single-level cell, SLC), multi-level storage cells (multi-level cell, MLC), three-level storage unit (triple-level cell, TLC), fourth-level storage unit (quad-level cell, QLC), etc.
- can include universal flash storage English: universal flash storage, UFS) according to storage specifications , embedded multimedia memory card (embedded multi media Card, eMMC), etc.
- the random access memory can be directly read and written by the processor 110, and can be used to store executable programs (such as machine instructions) of an operating system or other running programs, and can also be used to store data of users and application programs.
- the non-volatile memory can also store executable programs and data of users and application programs, etc., and can be loaded into the random access memory in advance for the processor 110 to directly read and write.
- the terminal 100 may implement an audio function through an audio module 170 , a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, and an application processor. Such as music playback, recording, etc.
- the audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal.
- the audio module 170 may also be used to encode and decode audio signals.
- the audio module 170 can be set in the processor 110 , or some functional modules of the audio module 170 can be set in the processor 110 .
- Speaker 170A also referred to as a "horn" is used to convert audio electrical signals into sound signals. Terminal 100 can listen to music through speaker 170A, or listen to hands-free calls.
- Receiver 170B also called “earpiece” is used to convert audio electrical signals into sound signals.
- the receiver 170B can be placed close to the human ear to listen to the voice.
- the microphone 170C also called “microphone” or “microphone” is used to convert sound signals into electrical signals.
- the user can put his mouth close to the microphone 170C to make a sound, and input the sound signal to the microphone 170C.
- the terminal 100 may be provided with at least one microphone 170C.
- the terminal 100 may be provided with two microphones 170C, which may also implement a noise reduction function in addition to collecting sound signals.
- the terminal 100 can also be equipped with three, four or more microphones 170C to realize sound signal collection, noise reduction, identify sound sources, realize directional recording functions, and the like.
- the earphone interface 170D is used for connecting wired earphones.
- the earphone interface 170D can be a USB interface 130, or a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.
- OMTP open mobile terminal platform
- CTIA cellular telecommunications industry association of the USA
- the pressure sensor 180A is used to sense the pressure signal and convert the pressure signal into an electrical signal.
- pressure sensor 180A may be disposed on display screen 194 .
- pressure sensors 180A such as resistive pressure sensors, inductive pressure sensors, and capacitive pressure sensors.
- a capacitive pressure sensor may be comprised of at least two parallel plates with conductive material.
- the terminal 100 determines the strength of the pressure from the change in capacitance.
- the terminal 100 detects the intensity of the touch operation according to the pressure sensor 180A.
- the terminal 100 may also calculate the touched position according to the detection signal of the pressure sensor 180A.
- touch operations acting on the same touch position but with different touch operation intensities may correspond to different operation instructions. For example: when a touch operation with a touch operation intensity less than the first pressure threshold acts on the short message application icon, an instruction to view short messages is executed. When a touch operation whose intensity is greater than or equal to the first pressure threshold acts on the icon of the short message application, the instruction of creating a new short message is executed.
- the gyro sensor 180B can be used to determine the motion posture of the terminal 100 .
- the angular velocity of the terminal 100 around three axes ie, x, y and z axes
- the gyro sensor 180B can be used for image stabilization.
- the gyro sensor 180B detects the shaking angle of the terminal 100, and calculates the distance that the lens module needs to compensate according to the angle, and allows the lens to counteract the shaking of the terminal 100 through reverse movement to achieve anti-shake.
- the gyro sensor 180B can also be used for navigation and somatosensory game scenes.
- the air pressure sensor 180C is used to measure air pressure.
- the terminal 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist positioning and navigation.
- the magnetic sensor 180D includes a Hall sensor.
- the terminal 100 may use the magnetic sensor 180D to detect the opening and closing of the flip holster.
- the terminal 100 when the terminal 100 is a clamshell machine, the terminal 100 can detect the opening and closing of the clamshell according to the magnetic sensor 180D.
- features such as automatic unlocking of the flip cover are set.
- the acceleration sensor 180E can detect the acceleration of the terminal 100 in various directions (generally three axes).
- the magnitude and direction of gravity can be detected when the terminal 100 is stationary. It can also be used to identify the posture of electronic devices, and can be used in applications such as horizontal and vertical screen switching, pedometers, etc.
- the distance sensor 180F is used to measure the distance.
- the terminal 100 can measure the distance by infrared or laser. In some embodiments, when shooting a scene, the terminal 100 may use the distance sensor 180F for distance measurement to achieve fast focusing.
- Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes.
- the light emitting diodes may be infrared light emitting diodes.
- the terminal 100 emits infrared light through the light emitting diode.
- the terminal 100 detects infrared reflected light from nearby objects using a photodiode. When sufficient reflected light is detected, it may be determined that there is an object near the terminal 100 . When insufficient reflected light is detected, the terminal 100 may determine that there is no object near the terminal 100 .
- the terminal 100 can use the proximity light sensor 180G to detect that the user holds the terminal 100 close to the ear to make a call, so as to automatically turn off the screen to save power.
- the proximity light sensor 180G can also be used in leather case mode, automatic unlock and lock screen in pocket mode.
- the ambient light sensor 180L is used for sensing ambient light brightness.
- the terminal 100 may adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness.
- the ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures.
- the ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the terminal 100 is in the pocket, so as to prevent accidental touch.
- the fingerprint sensor 180H is used to collect fingerprints.
- the terminal 100 can use the collected fingerprint characteristics to realize fingerprint unlocking, access to the application lock, take pictures with fingerprints, answer incoming calls with fingerprints, and so on.
- the temperature sensor 180J is used to detect temperature.
- the terminal 100 uses the temperature detected by the temperature sensor 180J to implement a temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds the threshold, the terminal 100 executes reducing the performance of a processor located near the temperature sensor 180J, so as to reduce power consumption and implement thermal protection.
- the terminal 100 when the temperature is lower than another threshold, the terminal 100 heats the battery 142 to avoid abnormal shutdown of the terminal 100 due to low temperature.
- the terminal 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.
- Touch sensor 180K also known as "touch panel”.
- the touch sensor 180K can be disposed on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a “touch screen”.
- the touch sensor 180K is used to detect a touch operation on or near it.
- the touch sensor can pass the detected touch operation to the application processor to determine the type of touch event.
- Visual output related to the touch operation can be provided through the display screen 194 .
- the touch sensor 180K may also be disposed on the surface of the terminal 100 , which is different from the position of the display screen 194 .
- the keys 190 include a power key, a volume key and the like.
- the key 190 may be a mechanical key. It can also be a touch button.
- the terminal 100 may receive key input and generate key signal input related to user settings and function control of the terminal 100 .
- the motor 191 can generate a vibrating reminder.
- the motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback.
- touch operations applied to different applications may correspond to different vibration feedback effects.
- the motor 191 may also correspond to different vibration feedback effects for touch operations acting on different areas of the display screen 194 .
- Different application scenarios for example: time reminder, receiving information, alarm clock, games, etc.
- the touch vibration feedback effect can also support customization.
- the indicator 192 can be an indicator light, and can be used to indicate charging status, power change, and can also be used to indicate messages, missed calls, notifications, and the like.
- the SIM card interface 195 is used for connecting a SIM card.
- the SIM card can be connected and separated from the terminal 100 by inserting it into the SIM card interface 195 or pulling it out from the SIM card interface 195 .
- the terminal 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1.
- SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card etc. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the multiple cards may be the same or different.
- the SIM card interface 195 is also compatible with different types of SIM cards.
- the SIM card interface 195 is also compatible with external memory cards.
- the terminal 100 interacts with the network through the SIM card to implement functions such as calling and data communication.
- the above content elaborates the method provided by the present application in detail.
- the embodiments of the present application also provide corresponding devices or equipment.
- the embodiment of the present application can divide the functional modules of the terminal 100 and the Beidou network device 200 according to the above-mentioned method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module middle.
- the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.
- FIG. 13 is a schematic structural diagram of a communication device 1300 provided in an embodiment of the present application.
- the communication device 1300 may be the terminal 100 in the foregoing embodiments.
- the communication device 1300 may be a chip/chip system, for example, a Beidou communication chip.
- the communication device 1300 may include a transceiver unit 1310 and a processing unit 1320 .
- the transceiver unit 1310 may be configured to receive the first physical frame sent by the Beidou network device 200; the first physical frame includes the first user frame sent to the terminal 100 and the second user frame sent to the second terminal, wherein, the frame header information of the first user frame includes a first user ID field and a first frame type field; the first user ID field is used to indicate the terminal receiving the first user frame; the first user ID field includes the ID of terminal 100 Information; parse out the first user frame from the first physical frame, and discard the second user frame.
- the processing unit 1320 is configured to send the first ACK to the Beidou network device after the terminal 100 has received all the SLC PDUs in the first SLC SDU.
- the first ACK is used to indicate that the terminal 100 has successfully received all the SLC PDUs in the first SLC SDU. SLC PDUs.
- the processing unit 1320 is further configured to: when the first SLC PDU analyzed by the terminal 100 is not the first SLC PDU in the first SLC SDU; the terminal 100 sends a second ACK to the Beidou network device and stops receiving the first SLC SDU In the second SLC PDU, the second ACK is used to indicate that the terminal 100 has not successfully received the first SLC PDU.
- the processing unit 1320 can also be used to send a third ACK to the Beidou network equipment after the terminal 100 has not received all the SLC PDUs in the first SLC SDU within the SLC PDU receiving time window, and the third ACK is used to indicate that the terminal 100 All SLC PDUs in the first SLC SDU were unsuccessfully received.
- the transceiver unit 1310 may also be configured to perform the functional steps related to sending and receiving performed by the terminal 100 in the method embodiment shown in FIG. 11B above.
- the processing unit 1320 may also be configured to perform functional steps related to protocol parsing and encapsulation and calculation determination performed by the terminal 100 in the method embodiment shown in the above figure.
- the communication device 1300 in this design can correspondingly perform the method steps performed by the terminal 100 in the foregoing embodiments, and for the sake of brevity, details are not repeated here.
- FIG. 14 is a schematic structural diagram of a communication device 1400 provided by an embodiment of the present application.
- the communication device 1400 may be the Beidou network device 200 in the foregoing embodiments.
- the communication device 1400 can be a specific network element in the Beidou network equipment 200, for example, one or more network elements in the Beidou ground transceiver station 22, the Beidou central station 23, and the Beidou short message fusion communication platform 24 The combination.
- the communication device 1400 may include a transceiver unit 1410 and a processing unit 1420 .
- the transceiver unit 1410 can be used to generate a first user frame sent to the terminal 100 at the satellite link control layer SLC, and a second user frame sent to the second terminal; at the physical PHY layer, based on the first user frame generating a first physical frame with the second user frame; and sending the first physical frame.
- the frame header information of the first user frame includes a first user ID field and a first frame type field; the first user ID field is used to indicate the terminal receiving the first user frame; the first user ID field includes the ID of terminal 100 Information; the first frame type field is used to indicate the frame type of the first user frame; the frame header information of the second user frame includes the second user ID field and the second frame type field; the second user ID field is used to indicate receiving the second The terminal of the user frame; the second user ID field includes ID information of the second terminal; the second frame type field is used to indicate the frame type of the second user frame.
- the processing unit 1420 can be used to receive the second ACK sent by the terminal 100 after the Beidou network equipment has sent the first SLC PDU, and the second ACK is used to indicate that the terminal 100 has not successfully received the first SLC PDU; Beidou network
- the device allocates resources of one or more SLC PDUs in the first SLC SDU to one or more SLC PDUs in the second SDU sent to the second terminal.
- the transceiver unit 1410 may also be configured to perform the functional steps related to sending and receiving performed by the Beidou network device 200 in the method embodiment shown in FIG. 11B above.
- the processing unit 1420 may also be configured to perform functional steps related to protocol parsing and encapsulation and calculation determination performed by the Beidou network device 200 in the method embodiment shown in FIG. 11B above.
- the communication device 1400 in this design can correspondingly perform the method steps performed by the Beidou network device 200 in the foregoing embodiments, and for the sake of brevity, details are not repeated here.
- the terminal 100 and the Beidou network device 200 of the embodiment of the present application have been introduced above. It should be understood that any product of any form having the functions of the terminal 100 described above in FIG. Products of any form with functions fall within the scope of protection of the embodiments of the present application.
- the terminal 100 described in the embodiment of the present application may be implemented by a general bus architecture.
- FIG. 15 is a schematic structural diagram of a communication device 1500 provided by an embodiment of the present application.
- the communication device 1500 may be the terminal 100, or a device therein.
- the communication device 1500 includes a processor 1501 and a transceiver 1502 internally connected and communicating with the processor.
- the processor 1501 is a general purpose processor or a special purpose processor or the like.
- it may be a baseband processor or a central processing unit for satellite communications.
- the baseband processor of satellite communication can be used to process satellite communication protocols and satellite communication data
- the central processing unit can be used to control communication devices (such as baseband chips, terminals, terminal chips, etc.), execute computer programs, and process computer Program data.
- the transceiver 1502 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function.
- the transceiver 1502 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.
- the communication device 1500 may further include an antenna 1503 and/or a radio frequency unit (not shown in the figure).
- the antenna 1503 and/or the radio frequency unit may be located inside the communication device 1500, or may be separated from the communication device 1400, that is, the antenna 1403 and/or the radio frequency unit may be remote or distributed.
- the communication device 1500 may include one or more memories 1504, on which instructions may be stored, the instructions may be computer programs, and the computer programs may be run on the communication device 1500, so that the communication device 1500 executes the above-mentioned Methods described in the Methods Examples.
- data may also be stored in the memory 1504 .
- the communication device 1500 and the memory 1504 can be set separately or integrated together.
- the processor 1501, the transceiver 1502, and the memory 1504 may be connected through a communication bus.
- the communication device 1500 can be used to perform the functions of the terminal 100 in the foregoing embodiments: the processor 1501 can be used to perform the functions related to protocol analysis and encapsulation and operation determination performed by the terminal 100 in the embodiment shown in FIG. 11B Steps and/or other processes used in the technology described herein; the transceiver 1502 may be used to perform functional steps related to protocol parsing and encapsulation and calculation determination performed by the terminal 100 in the embodiment shown in FIG. 11B and/or used to Other procedures of the techniques described herein.
- the processor 1501 may include a transceiver for implementing receiving and sending functions.
- the transceiver may be a transceiver circuit, or an interface, or an interface circuit.
- the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
- the above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transfer.
- the processor 1501 may store instructions, and the instructions may be computer programs, and the computer programs run on the processor 1501 to enable the communication device 1500 to perform the method steps performed by the terminal 100 in the above method embodiments.
- the computer program may be fixed in the processor 1500, and in this case, the processor 1501 may be implemented by hardware.
- the communication device 1500 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments.
- the processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc.
- the processor and transceiver can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
- CMOS complementary metal oxide semiconductor
- NMOS nMetal-oxide-semiconductor
- PMOS P-type Metal oxide semiconductor
- BJT bipolar junction transistor
- BiCMOS bipolar CMOS
- SiGe silicon germanium
- GaAs gallium arsenide
- Communications apparatus 1500 may be a stand-alone device or may be part of a larger device.
- the communication device 1500 may be:
- a set of one or more ICs may also include storage components for storing data and computer programs;
- ASIC such as modem (Modem);
- any network element for example, Beidou ground transceiver station 22, Beidou central station 23, Beidou short message fusion communication platform 24
- Beidou network equipment 200 described in the embodiment of the application can Implemented by a generic bus architecture.
- FIG. 16 is a schematic structural diagram of a communication device 1600 provided by an embodiment of the present application.
- the communication device 1600 may be the Beidou network device 200, or a device therein.
- the communication device 1600 includes a processor 1601 and a transceiver 1602 internally connected and communicating with the processor.
- the processor 1601 is a general purpose processor or a special purpose processor or the like.
- it may be a baseband processor or a central processing unit for satellite communications.
- the baseband processor of satellite communication can be used to process satellite communication protocols and satellite communication data
- the central processing unit can be used to control communication devices (such as baseband chips, etc.), execute computer programs, and process data of computer programs.
- the transceiver 1602 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function.
- the transceiver 1602 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.
- the communication device 1600 may further include an antenna 1603 and/or a radio frequency unit (not shown in the figure).
- the antenna 1603 and/or the radio frequency unit may be located inside the communication device 1600, or may be separated from the communication device 1600, that is, the antenna 1603 and/or the radio frequency unit may be remote or distributed.
- the communication device 1600 may include one or more memories 1604, on which instructions may be stored.
- the instructions may be computer programs, and the computer programs may be run on the communication device 1600, so that the communication device 1600 executes the above-mentioned Methods described in the Methods Examples.
- data may also be stored in the memory 1604 .
- the communication device 1600 and the memory 1604 can be set separately or integrated together.
- processor 1601, the transceiver 1602, and the memory 1604 may be connected through a communication bus.
- the communication device 1600 can be used to perform the functions of the Beidou network device 200 in the foregoing embodiments: the processor 1601 can be used to perform the related protocol parsing and encapsulation performed by the Beidou network device 200 in the embodiment shown in FIG. 11B and The functional steps determined by calculation and/or other processes used in the technology described herein; the transceiver 1602 can be used to perform the functions related to protocol parsing and encapsulation and calculation determination performed by the Beidou network device 200 in the embodiment shown in FIG. 11B steps and/or other processes for the techniques described herein.
- the processor 1601 may include a transceiver for implementing receiving and sending functions.
- the transceiver may be a transceiver circuit, or an interface, or an interface circuit.
- the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
- the above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.
- the processor 1601 may store instructions, which may be computer programs, and the computer programs run on the processor 1601 to enable the communication device 1600 to perform the method steps performed by the terminal 100 in the above method embodiments.
- the computer program may be fixed in the processor 1600, and in this case, the processor 1601 may be implemented by hardware.
- the embodiment of the present application also provides a computer-readable storage medium, where computer program code is stored in the computer-readable storage medium, and when the above-mentioned processor executes the computer program code, the communication device executes the method in any of the above-mentioned embodiments .
- An embodiment of the present application further provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any one of the foregoing embodiments.
- the embodiment of the present application also provides a communication device, which can exist in the product form of a chip.
- the structure of the device includes a processor and an interface circuit.
- the processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method in any of the examples.
- the embodiment of the present application also provides a Beidou communication system, including a terminal 100 and a Beidou network device 200.
- the terminal 100 and the Beidou network device 200 can execute the method in any of the foregoing embodiments.
- This application fully introduces the communication function of short messages in the Beidou communication system. It is understandable that there may be communication functions supporting short messages in other satellite systems. Therefore, it is not limited to the Beidou communication system. If other satellite systems also support the short message communication function, the method introduced in this application is also applicable to the communication of other satellite systems.
- the term “when” may be interpreted to mean “if” or “after” or “in response to determining" or “in response to detecting".
- the phrases “in determining” or “if detected (a stated condition or event)” may be interpreted to mean “if determining" or “in response to determining" or “on detecting (a stated condition or event)” or “in response to detecting (a stated condition or event)”.
- all or part of them may be implemented by software, hardware, firmware or any combination thereof.
- software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
- the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, DSL) or wireless (eg, infrared, wireless, microwave, etc.) means.
- the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
- the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state hard disk), etc.
- the processes can be completed by computer programs to instruct related hardware.
- the programs can be stored in computer-readable storage media.
- When the programs are executed may include the processes of the foregoing method embodiments.
- the aforementioned storage medium includes: ROM or random access memory RAM, magnetic disk or optical disk, and other various media that can store program codes.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (37)
- 一种北斗通信***中出站传输控制方法,其特征在于,包括:北斗网络设备在卫星链路控制SLC层生成发送给第一终端的第一用户帧,和发送给第二终端的第二用户帧;其中,所述第一用户帧的帧头信息包括第一用户ID字段和第一帧类型字段;所述第一用户ID字段用于指示接收所述第一用户帧的终端;所述第一用户ID字段中包含所述第一终端的ID信息;所述第一帧类型字段用于指示所述第一用户帧的帧类型;所述第二用户帧的帧头信息包括第二用户ID字段和第二帧类型字段;所述第二用户ID字段用于指示接收所述第二用户帧的终端;所述第二用户ID字段中包含所述第二终端的ID信息;所述第二帧类型字段用于指示所述第二用户帧的帧类型;所述北斗网络设备在物理PHY层基于所述第一用户帧和所述第二用户帧生成第一物理帧;所述北斗网络设备发送所述第一物理帧。
- 根据权利要求1所述的方法,其特征在于,所述第一用户帧包括卫星链路控制层协议数据单元SLC PDU和确认字符ACK帧、以及应用层回执帧,所述应用层回执帧用于指示所述北斗网络设备是否成功解析接收到的应用层报文。
- 根据权利要求2所述的方法,其特征在于,所述第一用户帧为第一卫星链路控制层服务数据单元SLC SDU中的第一卫星链路控制层协议数据单元SLC PDU,所述第一用户帧的帧头信息还包括确认模式使能AM enable字段、帧总数字段、帧序号字段;其中,所述AM enable字段用于指示所述第一终端回复ACK或不回复ACK;所述帧总数字段用于指示所述北斗网络设备发送给第一终端的SLC PDU的数量;所述帧序号字段用于指示所述北斗网络设备发送的所述SLC PDU的序号。
- 根据权利要求3所述的方法,其特征在于,所述第一SLC PDU的AM enable字段为第一值,所述第一值用于指示所述第一终端不回复ACK。
- 根据权利要求3所述的方法,其特征在于,所述第一SLC PDU的AM enable字段为第二值,所述第二值用于指示所述第一终端回复ACK。
- 根据权利要求5所述的方法,其特征在于,所述第一用户帧为所述第一SLC PDU,所述北斗网络设备发送所述第一物理帧之后,所述方法还包括:所述北斗网络设备继续发送所述第一SLC SDU中的一个或多个SLC PDU;在所述北斗网络设备发送所述完第一SLC SDU中的所有SLC PDU后,所述北斗网络设备接收到所述第一终端发送的第一ACK,所述第一ACK用于表示所述第一终端成功接收所述第一SLC SDU中的所有SLC PDU。
- 根据权利要求5所述的方法,其特征在于,所述第一用户帧为所述第一SLC PDU,所述北斗网络设备发送所述第一物理帧之后,所述方法还包括:当所述北斗网络设备发送完所述第一SLC PDU后,所述北斗网络设备接收到所述第一终端发送的第二ACK,所述第二ACK用于表示所述第一终端未成功接收所述第一SLC PDU;所述北斗网络设备将所述第一SLC SDU中的一个或多个SLC PDU的资源分配给发送给所述第二终端的第二SDU中的一个或多个SLC PDU。
- 根据权利要求5所述的方法,其特征在于,所述第一用户帧为所述第一SLC PDU,所述北斗网络设备发送所述第一物理帧之后,所述方法还包括:所述北斗网络设备继续发送所述第一SLC SDU中的一个或多个SLC PDU;在所述北斗网络设备发送所述完第一SLC SDU中的所有SLC PDU后,所述北斗网络设备接收到所述第一终端发送的第三ACK,所述第三ACK表示所述第一终端未成功接收所述第一SLC SDU中的所有SLC PDU。
- 根据权利要求1-8任一项所述的方法,其特征在于,所述第一物理帧的帧头信息包括速率指示字段或版本号字段;其中,所述速率指示字段用于指示所述第一物理帧的传输速率;所述版本号字段用于指示所述第一物理帧当前的版本信息。
- 根据权利要求3所述的方法,其特征在于,所述第一用户帧为所述第一SLC PDU,所述北斗网络设备在卫星链路控制层SLC生成发送给第一终端的第一用户帧,和发送给第二终端的第二用户帧之前,所述方法还包括:所述北斗网络设备在卫星链路控制SLC层获取到所述北斗网络设备的消息数据汇聚MDCP层下发的多个卫星链路控制层服务数据单元SLC SDU,其中,所述多个SLC SDU中包括所述第一SLC SDU;所述北斗网络设备在所述SLC层将所述第一SLC SDU拆分成N个SLC PDU。
- 根据权利要求10所述的方法,其特征在于,所述北斗网络设备在SLC层获取到所述北斗网络设备的MDCP层下发的多个SLC SDU之前,所述方法还包括:所述北斗网络设备在所述MDCP层获取到所述北斗网络设备的应用层下发的应用层报文;所述北斗网络设备在所述MDCP层将所述应用层报文作为MDCP SDU,并在所述MDCP SDU加入填充数据和冗余长度指示字段后,拆分成多个MDCP PDU;其中,所述冗余长度指示字段用于指示所述填充数据的数据长度,所述多个MDCP PDU中包括第一MDCP PDU,所述第一MDCP PDU的包头信息包括后继指示字段,所述后继指示字段用于指示所述第一MDCP PDU在所述多个MDCP PDU中的顺序;所述北斗网络设备将所述多个MDCP PDU从所述MDCP层下发至所述SLC层,作为所述SLC层的所述多个SLC SDU。
- 根据权利要求11所述的方法,其特征在于,所述北斗网络设备在所述MDCP层获取到所述北斗网络设备的应用层下发的应用层报文之前,所述方法还包括:所述北斗网络设备获取原始数据;所述北斗网络设备在所述应用层将所述原始数据,进行压缩得到压缩数据;所述北斗网络设备在所述应用层将所述压缩数据进行加密得到加密后数据;所述北斗网络设备在所述加密后数据头部加上报文头信息,得到所述应用层报文;其中,所述报文头信息包括压缩指示字段和加密指示字段,所述压缩指示字段用于指示对所述原始数据压缩时使用的压缩算法,所述加密指示字段用于指示对所述压缩数据加密时使用的加密算法。
- 根据权利要求10-12任一项所述的方法,其特征在于,所述北斗网络设备在所述SLC层将所述第一SLC SDU拆分成N个SLC PDU,具体包括:所述北斗网络设备将所述N个SLC PDU中的第一SLC PDU和第二SLC PDU下发至PHY层;所述北斗网络设备在PHY层将所述第一SLC PDU生成第一物理帧,将所述第二SLC PUD生成第二物理帧;所述北斗网络设备发送所述第一物理帧和所述第二物理帧。
- 根据权利要求13所述的方法,其特征在于,所述北斗网络设备发送所述第一物理帧,包括:所述北斗网络设备在所述PHY层在所述第一物理帧的尾部添加第一校验位信息,并对所述第一物理帧和所述第一校验位信息进行编码得到第一编码数据;所述北斗网络设备在所述PHY层对所述第一编码数据和所述第一编码数据的第一保留字段进行调制得到第一调制数据;所述北斗网络设备在所述PHY层对所述第一调制数据进行扩频得到第一扩频调制数据;所述北斗网络设备在所述PHY层发送所述第一扩频调制数据和所述第一扩频调制数据的第一导频信息。
- 根据权利要求1-14任一项所述的方法,其特征在于,所述方法还可以包括:所述北斗网络设备基于所述北斗网络设备发送完所述第一SLC SDU中最后一个SLC PDU的时刻、所述第一终端从接收完所述第一SLC SDU中最后一个SLC PDU到发送ACK的处理调度时延、所述第一终端的接收态至发送态的切换时长、以及空口传播时延确定出ACK接收时间窗的起始时刻;所述北斗网络设备在所述ACK接收时间窗的起始时刻开始接收ACK。
- 根据权利要求1-14任一项所述的方法,其特征在于,所述方法还可以包括:所述北斗网络设备基于所述北斗网络设备发送完所述第一SLC SDU中最后一个SLC PDU的时刻、所述第一终端从接收完所述第一SLC SDU中最后一个SLC PDU到发送ACK的处理时延、所述第一终端发送的ACK的时间长度、所述第一终端的接收态至发送态的切换时长、以及空口传播时延确定出ACK接收时间窗的结束时刻;所述北斗网络设备在所述ACK接收时间窗的结束时刻停止接收ACK。
- 一种北斗通信***中出站传输控制方法,其特征在于,包括:第一终端接收北斗网络设备发送的第一物理帧;所述第一物理帧中包含发送给所述第一终端的第一用户帧和发送给第二终端的第二用户帧,其中,所述第一用户帧的帧头信息包括 第一用户ID字段和第一帧类型字段;所述第一用户ID字段用于指示接收所述第一用户帧的终端;所述第一用户ID字段中包含所述第一终端的ID信息;所述第一终端从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧。
- 根据权利要求17所述的方法,其特征在于,所述第一用户帧为第一卫星链路控制层服务数据单元SLC SDU中的第一卫星链路控制层协议数据单元SLC PDU,所述第一用户帧的帧头信息还包括确认模式使能AM enable字段、帧总数字段、帧序号字段;其中,所述AM enable字段用于指示所述第一终端回复ACK或不回复ACK;所述帧总数字段用于指示所述北斗网络设备发送给第一终端的SLC PDU的数量;所述帧序号字段用于指示所述北斗网络设备发送的所述SLC PDU的序号。
- 根据权利要求18所述的方法,其特征在于,所述第一SLC PDU的AM enable字段为第一值,所述第一值用于指示所述第一终端不回复ACK。
- 根据权利要求18所述的方法,其特征在于,所述第一SLC PDU的AM enable字段为第二值,所述第二值用于指示所述第一终端回复ACK。
- 根据权利要求17-20任一项所述的方法,其特征在于,所述第一用户帧为第一SLC PDU,所述第一终端从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧之后,所述方法还包括:所述第一终端接收所述第一SLC SDU中的一个或多个SLC PDU;当所述第一终端收齐所述第一SLC SDU中的所有SLC PDU后,所述第一终端向所述北斗网络设备发送第一ACK,所述第一ACK用于表示所述第一终端成功接收所述第一SLC SDU中的所有SLC PDU。
- 根据权利要求17-20任一项所述的方法,其特征在于,所述第一用户帧为第一SLC SDU中的第一SLC PDU,所述第一终端从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧之后,所述方法还包括:当所述第一终端解析出的所述第一SLC PDU非所述第一SLC SDU中的第一个SLC PDU时;所述第一终端向所述北斗网络设备发送第二ACK并停止接收所述第一SLC SDU中的第二SLC PDU,所述第二ACK用于表示所述第一终端未成功接收所述第一SLC PDU。
- 根据权利要求17-20任一项所述的方法,其特征在于,所述第一用户帧为第一SLC SDU中的第一SLC PDU,所述第一终端从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧之后,所述方法还包括:所述第一终端接收所述第一SLC SDU中的一个或多个SLC PDU;当所述第一终端在SLC PDU接收时间窗内未收齐所述第一SLC SDU中的所有SLC PDU后,所述第一终端向所述北斗网络设备发送第三ACK,所述第三ACK用于表示所述第一终端未成功接收所述第一SLC SDU中的所有SLC PDU。
- 根据权利要求17-23任一项所述的方法,其特征在于,所述第一用户帧为第一SLC SDU中的第一SLC PDU,所述第一终端从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧,包括:所述第一终端在所述PHY层获取到终端发送的第一扩频调制数据;所述第一终端在所述PHY层对所述第一扩频调制数据进行解扩频,得到第一调制数据和第一调制同步头;所述第一终端在所述PHY层对所述第一调制数据和所述第一调制同步头解调,得到第一导频数据和第一同步头;所述第一终端在所述PHY层去除所述第一导频数据中的导频信息,得到第一编码数据;所述北斗网络设备在所述PHY层对所述第一编码数据进行解码,得到第一编码块物理帧和第一校验信息;所述第一终端在所述PHY层基于所述第一校验信息对所述第一编码块进行校验,并在校验成功后,将所述第一编码块中ID字段与所述第一终端ID相同的第一用户帧作为所述第一终端的SLC层中所述第一SLC SDU中的所述第一SLC PDU从所述PHY层呈递给所述第一终端的SLC层。
- 根据权利要求24中所述的方法,其特征在于,所述第一终端在所述PHY层基于所述第一校验信息对所述第一编码块进行校验,并在校验成功后,将所述第一编码块中ID字段与所述第一终端ID相同的第一用户帧作为所述第一终端的SLC层中所述第一SLC SDU中的所述第一SLC PDU从所述PHY层呈递给所述第一终端的SLC层之后,所述方法还包括:所述第一终端在SLC层将接收到的M个SLC PDU拼接成所述第一SLC SDU,并将所述第一SLC SDU作为MDCP层的第一MDCP PDU从所述第一终端的SLC层上报给所述第一终端的MDCP层,所述第一MDCP PDU的包头信息中包括后继指示字段,所述后继指示字段用于指示所述第一MDCP PDU在所述北斗网络设备发送的多个MDCP PDU中的顺序。
- 根据权利要求25所述的方法,其特征在于,所述方法还包括:所述第一终端在所述MDCP层获取到从所述第一终端SLC层上报的第二MDCP PDU;当所述第二MDCP PDU中的后继指示字段指示所述第二MDCP PDU为所述北斗网络设备发送的多个MDCP PDU中的最后一个时,所述第一终端在所述MDCP层将所述第一MDCP PDU与所述第二MDCP PDU拼接成MDCP SDU,并将所述MDCP SDU作为应用层报文从所述MDCP层上报给应用层。
- 根据权利要求26所述的方法,其特征在于,所述应用层报文包括报文头信息和加密后数据,所述报文头信息包括加密指示字段和压缩指示字段,所述压缩指示字段用于指示所述终端将原始数据压缩成压缩数据时使用的压缩算法,所述加密指示字段用于指示所述终端将所述压缩数据加密成加密后数据时使用的加密算法;所述方法还包括:所述第一终端在所述应用层通过所述应用层报文中加密指示字段指示的加密算法,对所述应用层报文中所述加密后数据进行解密,得到所述压缩数据;所述第一终端在所述应用层通过所述应用层报文中压缩指示字段指示的压缩算法,对所 述压缩数据进行解压缩,得到所述原始数据。
- 根据权利要求17-27任一项所述的方法,其特征在于,所述方法还包括:所述第一终端基于当前接收到的SLC PDU的帧序号、当前接收到的SLC PDU的时刻、所述北斗网络设备发送的物理帧的时间长度、所述北斗网络设备发送的一个SLC SDU中SLC PDU的帧总数、以及SLC PDU之间的发送间隔,确定出所述第一终端中SLC PDU接收窗的剩余时间长度。
- 根据权利要求28所述的方法,其特征在于,所述方法还包括:所述第一终端基于所述SLC PDU接收窗的时间长度、所述第一SLC PDU的接收时刻,所述第一终端的信号处理时延、以及所述第一终端发送的ACK的时间长度,确定出所述第一终端发送出ACK的时间点。
- 一种北斗通信***,其特征在于,包括第一终端和北斗网络设备;其中,所述北斗网络设备用于在卫星链路控制层SLC生成发送给第一终端的第一用户帧,和发送给第二终端的第二用户帧;其中,所述第一用户帧的帧头信息包括第一用户ID字段和第一帧类型字段;所述第一用户ID字段用于指示接收所述第一用户帧的终端;所述第一用户ID字段中包含所述第一终端的ID信息;所述第一帧类型字段用于指示所述第一用户帧的帧类型;所述第二用户帧的帧头信息包括第二用户ID字段和第二帧类型字段;所述第二用户ID字段用于指示接收所述第二用户帧的终端;所述第二用户ID字段中包含所述第二终端的ID信息;所述第二帧类型字段用于指示所述第二用户帧的帧类型;所述北斗网络设备用于在物理PHY层基于所述第一用户帧和所述第二用户帧生成第一物理帧;所述北斗网络设备用于发送所述第一物理帧;所述第一终端用于接收北斗网络设备发送的第一物理帧;从所述第一物理帧中解析出所述第一用户帧,丢弃所述第二用户帧。
- 一种通信装置,其特征在于,包括一个或多个处理器、一个或多个存储器和收发器;其中,所述收发器、所述一个或多个存储器与所述一个或多个处理器耦合,所述一个或多个存储器用于存储计算机程序代码,所述计算机程序代码包括计算机指令,当一个或多个处理器在执行所述计算机指令时,使得所述通信装置执行如权利要求1-16任一项所述的方法。
- 根据权利要求31所述的通信装置,其特征在于,所述通信装置为北斗网络设备。
- 一种通信装置,其特征在于,包括一个或多个处理器、一个或多个存储器、收发器;其中,所述收发器、所述一个或多个存储器与所述一个或多个处理器耦合,所述一个或多个存储器用于存储计算机程序代码,所述计算机程序代码包括计算机指令,当一个或多个处理器在执行所述计算机指令时,使得所述通信装置执行如权利要求17-29任一项所述的方法。
- 根据权利要求33所述的通信装置,其特征在于,所述通信装置为终端。
- 一种计算机可读存储介质,所述计算机可读存储介质中存储有指令,当所述指令在计算机上运行时,使得所述计算机执行如权利要求1-16任一项所述的方法。
- 一种计算机可读存储介质,所述计算机可读存储介质中存储有指令,当所述指令在计算机上运行时,使得所述计算机执行如权利要求17-29任一项所述的方法。
- 一种芯片或芯片***,应用于终端,其特征在于,包括处理电路和接口电路,所述接口电路用于接收代码指令并传输至所述处理电路,所述处理电路用于运行所述代码指令以执行如权利要求17-29任一项所述的方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22852075.5A EP4358430A1 (en) | 2021-07-31 | 2022-07-29 | Control method and system for outbound transport in beidou communication system, and related apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110877279.1A CN115694595A (zh) | 2021-07-31 | 2021-07-31 | 一种北斗通信***中出站传输控制方法、***及相关装置 |
CN202110877279.1 | 2021-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023011362A1 true WO2023011362A1 (zh) | 2023-02-09 |
Family
ID=85059899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2022/109123 WO2023011362A1 (zh) | 2021-07-31 | 2022-07-29 | 一种北斗通信***中出站传输控制方法、***及相关装置 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4358430A1 (zh) |
CN (1) | CN115694595A (zh) |
WO (1) | WO2023011362A1 (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116527122A (zh) * | 2023-07-03 | 2023-08-01 | 中国人民解放军海军工程大学 | 一种北斗短报文/电话语音互联服务***、方法及设备 |
CN117278949A (zh) * | 2023-11-17 | 2023-12-22 | 中国人民解放军国防科技大学 | 一种针对低功耗用户终端的北斗短报文通信方法和*** |
CN118101028A (zh) * | 2024-02-01 | 2024-05-28 | 北斗应用发展研究院 | 支持民用手机的北斗短报文***出站资源均衡方法和装置 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5905443A (en) * | 1995-10-02 | 1999-05-18 | Motorola, Inc. | Paging system employing delivery schedule combining and method of operation thereof |
US6157621A (en) * | 1991-10-28 | 2000-12-05 | Teledesic Llc | Satellite communication system |
CN1753545A (zh) * | 2004-09-20 | 2006-03-29 | 上海贝尔阿尔卡特股份有限公司 | 处理多用户/多业务的方法及设备 |
CN111903237B (zh) * | 2009-03-10 | 2013-01-02 | 中国电子科技集团公司第五十四研究所 | 低轨卫星移动通信***星载交换机的设计方法 |
CN104506267A (zh) * | 2014-10-15 | 2015-04-08 | 上海欧科微航天科技有限公司 | 一种低轨卫星通信的上行链路准同步接入方法及装置 |
CN105934897A (zh) * | 2014-01-29 | 2016-09-07 | Lg电子株式会社 | 配置用于d2d通信***的macpdu的方法及其装置 |
CN110784255A (zh) * | 2019-10-24 | 2020-02-11 | 北京卫星导航中心 | 一种北斗用户终端通信资源共享*** |
CN112954665A (zh) * | 2021-03-16 | 2021-06-11 | 西安电子科技大学 | 一种基于动态服务域的卫星网络移动性管理方法 |
-
2021
- 2021-07-31 CN CN202110877279.1A patent/CN115694595A/zh active Pending
-
2022
- 2022-07-29 WO PCT/CN2022/109123 patent/WO2023011362A1/zh active Application Filing
- 2022-07-29 EP EP22852075.5A patent/EP4358430A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6157621A (en) * | 1991-10-28 | 2000-12-05 | Teledesic Llc | Satellite communication system |
US5905443A (en) * | 1995-10-02 | 1999-05-18 | Motorola, Inc. | Paging system employing delivery schedule combining and method of operation thereof |
CN1753545A (zh) * | 2004-09-20 | 2006-03-29 | 上海贝尔阿尔卡特股份有限公司 | 处理多用户/多业务的方法及设备 |
CN111903237B (zh) * | 2009-03-10 | 2013-01-02 | 中国电子科技集团公司第五十四研究所 | 低轨卫星移动通信***星载交换机的设计方法 |
CN105934897A (zh) * | 2014-01-29 | 2016-09-07 | Lg电子株式会社 | 配置用于d2d通信***的macpdu的方法及其装置 |
CN104506267A (zh) * | 2014-10-15 | 2015-04-08 | 上海欧科微航天科技有限公司 | 一种低轨卫星通信的上行链路准同步接入方法及装置 |
CN110784255A (zh) * | 2019-10-24 | 2020-02-11 | 北京卫星导航中心 | 一种北斗用户终端通信资源共享*** |
CN112954665A (zh) * | 2021-03-16 | 2021-06-11 | 西安电子科技大学 | 一种基于动态服务域的卫星网络移动性管理方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116527122A (zh) * | 2023-07-03 | 2023-08-01 | 中国人民解放军海军工程大学 | 一种北斗短报文/电话语音互联服务***、方法及设备 |
CN116527122B (zh) * | 2023-07-03 | 2023-08-29 | 中国人民解放军海军工程大学 | 一种北斗短报文/电话语音互联服务***、方法及设备 |
CN117278949A (zh) * | 2023-11-17 | 2023-12-22 | 中国人民解放军国防科技大学 | 一种针对低功耗用户终端的北斗短报文通信方法和*** |
CN117278949B (zh) * | 2023-11-17 | 2024-01-30 | 中国人民解放军国防科技大学 | 一种针对低功耗用户终端的北斗短报文通信方法和*** |
CN118101028A (zh) * | 2024-02-01 | 2024-05-28 | 北斗应用发展研究院 | 支持民用手机的北斗短报文***出站资源均衡方法和装置 |
Also Published As
Publication number | Publication date |
---|---|
EP4358430A1 (en) | 2024-04-24 |
CN115694595A (zh) | 2023-02-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2023011362A1 (zh) | 一种北斗通信***中出站传输控制方法、***及相关装置 | |
WO2023025075A1 (zh) | 北斗通信***中出站数据传输方法、***及相关装置 | |
WO2023011376A1 (zh) | 一种北斗通信***中密钥更新方法、***及相关装置 | |
WO2023011379A1 (zh) | 一种北斗通信***中入站传输控制方法、***及相关装置 | |
WO2023011380A1 (zh) | 一种北斗通信***中多帧融合传输方法及相关装置 | |
CN115696237A (zh) | 一种北斗通信***中加密方法、***及相关装置 | |
WO2023185893A1 (zh) | 一种卫星信号捕获方法及相关装置 | |
CN115734303A (zh) | 一种切换网络的方法及相关装置 | |
WO2023011605A1 (zh) | 北斗通信***中的信件下载查询方法、***及相关装置 | |
WO2023124186A1 (zh) | 通信方法和通信装置 | |
CN115706603A (zh) | 北斗通信***中紧凑传输方法、***及相关装置 | |
CN116032336A (zh) | 北斗通信***中波束选择方法、***及相关装置 | |
CN115842799A (zh) | 北斗通信***中的信箱概况查询方法、***及相关装置 | |
WO2023011329A1 (zh) | 一种北斗通信***中数据传输控制方法、***及相关装置 | |
WO2023011377A1 (zh) | 一种北斗通信***中应用层回执传输方法、***及装置 | |
WO2023011478A1 (zh) | 一种北斗通信***中的数据压缩方法、***及相关装置 | |
CN113678481B (zh) | 无线音频***、音频通讯方法及设备 | |
WO2023083027A1 (zh) | 一种北斗通信***中的参数更新方法、***及相关装置 | |
WO2023011594A1 (zh) | 北斗通信***中的信箱概况查询方法、***及相关装置 | |
CN115842800B (zh) | 北斗通信***中的信件下载查询方法、***及相关装置 | |
WO2023011603A1 (zh) | 一种北斗通信***中位置上报方法、***及相关装置 | |
CN115941016A (zh) | 北斗通信***中紧凑反馈方法、***及相关装置 | |
CN115706605A (zh) | 北斗通信***中入站调度方法及相关装置 | |
CN115707034A (zh) | 一种北斗通信***中的数据压缩方法、***及相关装置 | |
CN117424678A (zh) | 北斗通信***中入站压缩传输方法、***及装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22852075 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022852075 Country of ref document: EP Ref document number: 22852075 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18293640 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2022852075 Country of ref document: EP Effective date: 20240116 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |