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KR-102962644-B1 - SIDELINK COMMUNICATION

KR102962644B1KR 102962644 B1KR102962644 B1KR 102962644B1KR-102962644-B1

Abstract

One disclosure of the present specification provides a UE that performs sidelink communication. The UE may include at least one transceiver; at least one processor; and at least one memory that stores instructions and is operablely electrically connected to the at least one processor. An operation performed based on the execution of the instructions by the at least one processor may include: receiving DMRS from another UE via PSSCH or PSCCH; and measuring the RSRP of the DMRS based on RSRP measurement requirements.

Inventors

  • 양윤오
  • 이상욱
  • 임수환
  • 황진엽
  • 박종근

Assignees

  • 엘지전자 주식회사

Dates

Publication Date
20260508
Application Date
20210401
Priority Date
20200406

Claims (16)

  1. In User Equipment (UE), At least one transceiver; At least one processor; and It includes at least one memory that stores instructions and is operablely electrically connected to at least one processor, and The operation performed based on the execution of the above instruction by the at least one processor is: The method includes the step of performing a Physical Sidelink Shared Channel (PSSCH) - Reference Signal Received Power (RSRP) measurement or a Physical Sidelink Control Channel (PSCCH) - RSRP measurement, Reference Signal Received Power (RSRP) measurement requirements are applied to the above UE, and The above RSRP measurement requirements include i) a requirement that the ratio of the received power spectral density of total noise and interference for a specific RE to a value related to the received energy per Resource Element (RE) of the PSSCH-Demodulation Reference signal (DMRS) or PSCCH-DMRS is 0 dB or greater, and ii) a requirement that the accuracy of the RSRP is ±4.5 dB, for a UE.
  2. In paragraph 1, The above RSRP measurement requirements include the minimum value of the total received power density, UE.
  3. In paragraph 2, For New Radio (NR) Vehicle-to-Everything (V2X) operating band n38, the minimum value of the total received power density is: Based on the subcarrier spacing (SCS) being 15kHz, it is -120.5dBm, and Based on the above SCS being 30kHz, it is -117.5dBm, and Based on the above SCS being 60kHz, UE is -114.5dBm.
  4. In paragraph 2, For the NR V2X operating band n47, the minimum value of the total received power density is: Based on the SCS being 15kHz, it is -116.5dBm, and Based on the above SCS being 30kHz, it is -113.5dBm, and Based on the above SCS being 60kHz, UE is -110.5dBm.
  5. delete
  6. In paragraph 1, A UE characterized in that the above UE is an autonomous driving device that communicates with at least one of a mobile terminal, a network, and an autonomous driving vehicle other than the above UE.
  7. In paragraph 1, A UE in which the conditions related to the above RSRP measurement requirements include the minimum RSRP.
  8. In Paragraph 7, For the NR V2X operating band n38, the above minimum RSRP is: Based on the SCS being 15kHz, it is -120.5dBm, and Based on the fact that the above SCS is 30kHz, it is -117.5dBm, and Based on the above SCS being 60kHz, UE is -114.5dBm.
  9. In Paragraph 7, For NR V2X operating band n47, the above minimum RSRP is: Based on the SCS being 15kHz, it is -116.5dBm, and Based on the fact that the above SCS is 30kHz, it is -113.5dBm, and Based on the above SCS being 60kHz, UE is -110.5dBm.
  10. User Equipment (UE) includes the step of performing a Physical Sidelink Shared Channel (PSSCH) - Reference Signal Received Power (RSRP) measurement or a Physical Sidelink Control Channel (PSCCH) - RSRP measurement, and The Reference Signal Received Power (RSRP) measurement requirements are applied to the UE, and A method comprising the above RSRP measurement requirements i) a requirement that the ratio of the received power spectral density of total noise and interference for a specific RE to a value related to the received energy per Resource Element (RE) of the PSSCH-Demodulation Reference signal (DMRS) or PSCCH-DMRS is 0 dB or greater, and ii) a requirement that the accuracy of the RSRP is ±4.5 dB.
  11. In Paragraph 10, A method in which the above RSRP measurement requirements include the minimum value of the total received power density.
  12. In Paragraph 11, For New Radio (NR) Vehicle-to-Everything (V2X) operating band n38, the minimum value of the total received power density is: Based on the subcarrier spacing (SCS) being 15kHz, it is -120.5dBm, and Based on the above SCS being 30kHz, it is -117.5dBm, and A method in which the above SCS is -114.5dBm based on the fact that the above SCS is 60kHz.
  13. In Paragraph 11, For the NR V2X operating band n47, the minimum value of the total received power density is: Based on the SCS being 15kHz, it is -116.5dBm, and Based on the above SCS being 30kHz, it is -113.5dBm, and A method in which the above SCS is -110.5dBm based on the fact that the above SCS is 60kHz.
  14. In User Equipment (UE), At least one transceiver; At least one processor; and It includes at least one memory that stores instructions and is operablely electrically connected to at least one processor, and The operation performed based on the execution of the above instruction by the at least one processor is: The method includes the step of performing a Physical Sidelink Shared Channel (PSSCH) - Reference Signal Received Power (RSRP) measurement or a Physical Sidelink Control Channel (PSCCH) - RSRP measurement, The above Reference Signal Received Power (RSRP) measurement requirements are applied to the UE, and The above RSRP measurement requirements include a requirement that the accuracy of the RSRP is ±4.5dB, and The conditions related to the above RSRP measurement requirements include the minimum RSRP, and For New Radio (NR) Vehicle-to-Everything (V2X) operating band n38, the above minimum RSRP is: Based on the subcarrier spacing (SCS) being 15kHz, it is -120.5dBm, and Based on the fact that the above SCS is 30kHz, it is -117.5dBm, and Based on the above SCS being 60kHz, UE is -114.5dBm.
  15. In Paragraph 14, A UE, wherein the above RSRP measurement requirement further includes a requirement that the ratio of the received power spectral density of total noise and interference for a specific RE to the value related to the received energy per Resource Element (RE) of the PSSCH-Demodulation Reference signal (DMRS) or PSCCH-DMRS is 0dB or greater.
  16. In Paragraph 14, For NR V2X operating band n47, the above minimum RSRP is: Based on the above SCS being 15kHz, it is -116.5dBm, and Based on the fact that the above SCS is 30kHz, it is -113.5dBm, and Based on the above SCS being 60kHz, UE is -110.5dBm.

Description

Sidelink Communication This specification relates to mobile communication. The 3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology that enables high-speed packet communications. Many plans have been proposed for LTE goals, including reducing user and provider costs, improving quality of service, and expanding and improving coverage and system capacity. 3GPP LTE requires, as upper-level requirements, cost per bit reduction, improved service availability, flexible use of frequency bands, a simple architecture, open interfaces, and appropriate power consumption of terminals. Work has begun at the ITU (International Telecommunication Union) and 3GPP to develop requirements and specifications for New Radio (NR) systems. 3GPP must identify and develop the technical components necessary to successfully and timely standardize New Radio Access Technology (RAT) that meets both urgent market needs and the long-term requirements set forth in the ITU-R (International Mobile Telecommunications) International Mobile Telecommunications (IMT)-2020 process. Furthermore, NR must be able to utilize spectrum bands ranging from a minimum to a maximum of 100 GHz that can be used for wireless communication even in the distant future. NR aims to be a single technical framework that covers all use scenarios, requirements, and deployment scenarios, including enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable and low-latency communications (URLLC). NR is inherently forward compatible. Sidelink (SL) refers to a communication method in which User Equipment (UE) establishes a direct link to directly exchange voice or data between terminals without passing through a Base Station (BS). SL is being considered as a solution to address the burden on base stations caused by rapidly increasing data traffic. In order to efficiently perform NR V2X (or SL) communication, a terminal can perform measurements on signals transmitted by other terminals. However, conventionally, the requirements for a terminal to effectively perform measurements were not clearly defined. For example, conventionally, the accuracy and side conditions for a terminal performing V2X communication to measure RSRP were not clearly defined. Furthermore, conventionally, the minimum value of the RSRP measured by the terminal was not clearly defined. FIG. 1 shows an example of a communication system to which the implementation of the present specification is applied. FIG. 2 shows an example of a wireless device to which the implementation of the present specification applies. FIG. 3 shows an example of a wireless device to which the implementation of the present specification applies. FIG. 4 shows an example of the structure of a wireless frame of NR to which the implementation of the present specification is applied. FIG. 5 shows an example of a slot structure of an NR frame to which the implementation of the present specification is applied. FIGS. 6a and 6b illustrate an example of a radio protocol architecture for SL communication to which the implementation of the present specification applies. FIG. 7 shows an example of a terminal performing V2X or SL communication to which the implementation of the specification applies. FIGS. 8a and 8b illustrate an example of a procedure in which a terminal to which the implementation of the present specification applies performs V2X or SL communication according to a transmission mode. FIG. 9 shows an example of a simulation result for PSCCH-RSRP according to the disclosure of the present specification. FIG. 10 shows an example of a simulation result for PSSCH-RSRP according to the disclosure of the present specification. FIG. 11 illustrates an example of the operation of a terminal according to the disclosure of the present specification. The following techniques, devices, and systems may be applied to various wireless multiple access systems. Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multicarrier frequency division multiple access (MC-FDMA) systems. CDMA may be implemented through wireless technologies such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented through wireless technologies such as global system for mobile communications (GSM), general packet radio service (GPRS), or enhanced data rates for GSM evolution (EDGE). OFDMA can be implemented through wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or E-UTRA (evolved UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project) LTE (long-term evolution)