KR-20260065783-A - APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN NON-TERRESTRIAL NETWORK SYSTEM

Abstract

A wireless transmission and reception method performed by a terminal is provided. The wireless transmission and reception method is provided by including the steps of receiving query information regarding capability information of the terminal from a base station, transmitting capability information of the terminal to the base station, and receiving information regarding the number of maximum HARQ (Hybrid Automatic Repeat request) processes from the base station.

Inventors

• 류창우
• 김송학

Assignees

• 가온그룹 주식회사

Dates

Publication Date

20260511

Application Date

20260427

Priority Date

20201022

Claims (20)

1. In a wireless transmission and reception method performed by a terminal, A step of receiving query information regarding capability information of the above terminal from a base station; (i) transmitting capability information of the terminal to the base station, the information including first information regarding physical layer parameters, and (ii) second information indicating whether the terminal supports non-terrestrial network (NTN) access; and A step of receiving an RRC (Radio Resource Control) message from the base station containing information regarding the number of HARQ (Hybrid Automatic Repeat request) processes to be used for the physical downlink shared channel (PDSCH) for the terminal; and (i) receiving a control channel including DCI (Downlink Control Information), and (ii) receiving a downlink including the physical downlink common channel (PDSCH) for the terminal; and Based on the receipt of the above downlink, perform HARQ feedback, If the above HARQ feedback is disabled, the execution of the above HARQ feedback is omitted, the method comprises the step of: Based on the fact that the above terminal supports the disabling function of the HARQ feedback, the second information indicates that the terminal supports NTN access, and The maximum value of the number of the above HARQ processes is 32, and The timing of the execution of the above HARQ feedback is indicated via (i) the DCI, or (ii) the RRC message, in a wireless transmission and reception method.
2. In paragraph 1, A wireless transmission and reception method characterized in that the capability information of the above terminal includes the number of HARQ processes that the terminal can support.
3. In paragraph 1, A wireless transmission and reception method characterized in that the capability information of the above terminal further includes size information of a HARQ buffer that the terminal can support.
4. In paragraph 1, A wireless transmission and reception method characterized in that the maximum number of HARQ processes is set larger when the terminal supports NTN access than when the terminal does not support NTN access.
5. In paragraph 1, Information regarding the above HARQ process-specific deactivation is received from the base station, and A wireless transmission and reception method in which the above HARQ process-specific disablement setting is associated with NTN (non-terrestrial network) parameters based on RTT (Round Trip Time).
6. In a wireless transmission and reception method performed by a base station, A step of transmitting query information regarding the capability information of the terminal to the terminal; (i) receiving capability information of the terminal, comprising first information regarding physical layer parameters, and (ii) second information indicating whether the terminal supports non-terrestrial network (NTN) access; A step of determining the number of HARQ (Hybrid Automatic Repeat request) processes to be used for the physical downlink shared channel (PDSCH) for the above terminal; and A step of transmitting an RRC (Radio Resource Control) message containing information regarding the number of the above HARQ processes to the terminal; and (i) a control channel including DCI (Downlink Control Information), and (ii) a downlink including the physical downlink common channel (PDSCH) for the terminal; and Based on the transmission of the above downlink, receive HARQ feedback, If the above HARQ feedback is disabled, the reception of the above HARQ feedback is omitted; the method comprises the step of Based on the fact that the above terminal supports the disabling function of the HARQ feedback, the second information indicates that the terminal supports NTN access, and The maximum number of the above HARQ processes is 32, and The timing of the reception of the above HARQ feedback is indicated via (i) the DCI, or (ii) the RRC message, in a wireless transmission and reception method.
7. In paragraph 6, A wireless transmission and reception method characterized in that the capability information of the above terminal includes the number of HARQ processes that the terminal can support.
8. In paragraph 6, A wireless transmission and reception method characterized in that the capability information of the above terminal further includes size information of a HARQ buffer that the terminal can support.
9. In paragraph 8, A wireless transmission and reception method characterized in that, when the terminal supports the NTN, the maximum number of HARQ processes is set to be greater than when it does not support the NTN.
10. In paragraph 6, Information regarding the above HARQ process-specific deactivation is received from the base station, and A wireless transmission and reception method in which the above HARQ process-specific disablement setting is associated with NTN (non-terrestrial network) parameters based on RTT (Round Trip Time).
11. Receive query information regarding the terminal's capability information from the base station, and (i) first information regarding physical layer parameters, and (ii) second information indicating whether the terminal supports non-terrestrial network (NTN) access, and transmit capability information of the terminal to the base station, and Receiving an RRC (Radio Resource Control) message from the base station containing information regarding the number of HARQ (Hybrid Automatic Repeat request) processes to be used for the physical downlink shared channel (PDSCH) for the terminal, and (i) receiving a control channel including DCI (Downlink Control Information), and (ii) receiving a downlink including the physical downlink common channel (PDSCH) for the terminal, and Based on the receipt of the above downlink, perform HARQ feedback, If the above HARQ feedback is disabled, the execution of the above HARQ feedback is omitted, and Based on the fact that the terminal supports a function to disable the HARQ feedback, the second information includes a transceiver indicating that the terminal supports NTN access, wherein The maximum number of the above HARQ processes is 32, and The timing of the execution of the above HARQ feedback is indicated by (i) the DCI, or (ii) the RRC message, of the terminal.
12. In Paragraph 11, A terminal characterized in that the capability information of the above terminal includes the number of HARQ processes that the terminal can support.
13. In Paragraph 11, A terminal characterized in that the capability information of the above terminal further includes size information of the HARQ buffer that the terminal can support.
14. In Paragraph 13, A terminal characterized in that, when the terminal supports the NTN, the maximum number of HARQ processes is set to be greater than when the terminal does not support the NTN.
15. In Paragraph 11, (i) information regarding the number of HARQ processes to be used for the physical downlink common channel for the terminal, (ii) information regarding the deactivation of each HARQ process is received from the base station, and, The above HARQ process-specific disablement setting is associated with a terminal, a non-terrestrial network (NTN) parameter based on Round Trip Time (RTT).
16. Transmit query information regarding the capability information of the terminal to the said terminal, and Receiving capability information of the terminal from the terminal, comprising (i) first information regarding physical layer parameters, and (ii) second information indicating whether the terminal supports non-terrestrial network (NTN) access, and Transmit an RRC (Radio Resource Control) message to the terminal containing information regarding the number of HARQ (Hybrid Automatic Repeat request) processes to be used for the physical downlink shared channel (PDSCH) for the terminal, and (i) a control channel including DCI (Downlink Control Information), and (ii) a downlink including the physical downlink common channel (PDSCH) for the terminal, and Based on the transmission of the above downlink, receive HARQ feedback, If the above HARQ feedback is disabled, the reception of the above HARQ feedback is omitted, and Based on the fact that the terminal supports the disabling function of the HARQ feedback, the second information indicates that the terminal supports NTN access, a transceiver; and A processor for determining the number of the above HARQ processes, comprising: The maximum number of the above HARQ processes is 32, and The timing of the reception of the above HARQ feedback is indicated by (i) the DCI, or (ii) the RRC message, at the base station.
17. In Paragraph 16, A base station characterized by the capability information of the above terminal including the number of HARQ processes that the terminal can support.
18. In Paragraph 16, A base station characterized in that the capability information of the above terminal further includes size information of the HARQ buffer that the above terminal can support.
19. In Paragraph 18, A base station characterized in that, when the terminal supports the NTN, the maximum number of HARQ processes is set to be greater than when the terminal does not support the NTN.
20. In Paragraph 16, Information regarding the above HARQ process-specific deactivation is transmitted to the terminal, and The above HARQ process-specific disablement setting is a base station associated with NTN (non-terrestrial network) parameters based on RTT (Round Trip Time).

Description

Apparatus and method for transmitting and receiving data in a non-terrestrial network system The present invention relates to a wireless communication system, and more specifically, to a device and method for transmitting and receiving data in a non-terrestrial network system. 3GPP paved the way for the commercial application of 5G by finalizing the first global 5G New Radio (NR) standard in Release (Rel)-15. In addition, NR-based Non-Terrestrial Networks (NTNs) are being considered as one of the evolutionary stages of NR to enable 5G activation and expand the ecosystem. Due to their extensive service coverage capabilities and reduced vulnerability of space/aviation platforms to physical attacks and natural disasters, NTNs can provide 5G services in a cost-effective manner in areas not served by terrestrial 5G networks (isolated or remote areas, onboard aircraft or ships) and in areas with weak service (suburban or rural areas). Furthermore, they enable service continuity for M2M and IoT devices or passengers on mobile platforms (aircraft, ships, high-speed trains, buses, etc.), and support highly reliable, omni-accessible 5G services for key communications such as future railway, maritime, and aviation communications. In addition, it can support the availability of 5G networks by providing efficient multicast/broadcast resources for data delivery to network edges or user terminals. These benefits can be provided through standalone NTNs or integrated terrestrial and non-terrestrial networks, and are expected to have an impact in sectors such as transportation, public safety, media and entertainment, eHealth, energy, agriculture, finance, and automotive. The NR-based NTN standardization study by the 3GPP RAN Working Group (WG) began in March 2017 at the RAN plenary meeting RAN#75 with approval as a Rel-15 Study Item (SI) for the RAN plenary and RAN1. The purpose of this SI was to develop a channel model for NTN and to study NTN scenarios and the resulting impact of NR, which was summarized in the Technical Report (TR) TR 38.811. Based on this, specification issues requiring NTN standardization were proposed as Rel-16 items and were approved as Rel-16 SIs at the RAN#80 meeting in June 2018. FIG. 1 is a conceptual diagram illustrating a wireless communication system according to one embodiment of the present invention. FIG. 2 is an exemplary diagram showing an NR system to which a data transmission method according to one embodiment of the present invention can be applied. FIG. 3 is a diagram illustrating a resource grid supported by wireless access technology to which the present embodiment can be applied. FIG. 4 is a diagram illustrating the bandwidth part supported by the wireless access technology to which the present embodiment can be applied. FIG. 5 is a diagram illustrating an exemplary synchronization signal block in a wireless access technology to which the present embodiment can be applied. FIG. 6 is a diagram illustrating a random access procedure in a wireless access technology to which the present embodiment can be applied. FIG. 7 is a diagram illustrating various forms of a non-ground network structure to which one embodiment can be applied. Figure 8 is a diagram illustrating the HARQ processing period for setting the number of HARQ processes. FIG. 9 is a flowchart illustrating the procedure for setting the number of HARQ processes according to one embodiment. FIG. 10 is a flowchart illustrating the procedure for setting the number of HARQ processes according to another embodiment. FIG. 11 shows a terminal and a network node in which an embodiment of the present invention is implemented. The present invention is susceptible to various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing. In this specification, terms such as "first," "second," "A," "B," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. Additionally, the term "and/or" includes a combination of a plurality of related described items or any one of a plurality of related described items. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other