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KR-20260063206-A - Base station device and operating method of the device

KR20260063206AKR 20260063206 AKR20260063206 AKR 20260063206AKR-20260063206-A

Abstract

The present invention provides a technology that enables SRS transmission of a 6G terminal without affecting the operation of an existing 5G terminal in a cell where 5G and 6G share a frequency (i.e., where a 5G terminal and a 6G terminal operate in the same area and the same frequency band), and specifically provides a technical solution for the setup and procedure for 6G SRS transmission.

Inventors

  • 최기완

Assignees

  • 에스케이텔레콤 주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (7)

  1. In a terminal device, Memory containing instructions; and A processor that transmits a specific UL-RS (Uplink-Reference Signal) according to the settings of the first or second base station servicing the terminal device in a cell that shares a frequency between the first and second base stations of different communication networks by executing the above command; The aforementioned specific UL-RS is, A terminal device characterized by being assigned to different resources between the first and second base stations according to the UL-RS setting procedure between the first and second base stations, and being assigned to a resource different from the PUSCH of the second or first base station to which the terminal device is not connected.
  2. In Article 1, The UL-RS setup procedure between the first and second base stations mentioned above is, A process in which the second base station to which the terminal device is connected receives UL-RS setting and scheduling information of the first base station through an interface defined between the first and second base stations, A terminal device characterized by including a process in which the second base station sets up UL-RS transmission at the second base station based on the UL-RS setting and scheduling information, and transmits result information according to the setting to the first base station.
  3. In Article 2, The above UL-RS configuration and scheduling information includes, It includes SRS-Configuration information used to set the SRS (Sounding Reference Signal) to the terminal at the first base station, and PUSCH scheduling information for each RB. The above result information includes, A terminal device characterized by including SRS-Configuration information used to configure the SRS at the second base station.
  4. In Article 2, The specific UL-RS mentioned above is an SRS (Sounding Reference Signal), and The above-mentioned second base station is, Through the above UL-RS setting procedure, the resources allocated for SRS and the resources allocated for PUSCH at the first base station are identified, and A terminal device characterized by allocating resources allocated by the first base station for the SRS and PUSCH when setting up the SRS for the terminal, and allocating resources allocated by the first base station for the SRS when scheduling the PUSCH.
  5. In the method of operating a terminal device, In a cell that shares a frequency between a first base station and a second base station of different communication networks, the method includes the step of transmitting a specific UL-RS (Uplink-Reference Signal) according to the settings of the first or second base station that services the terminal device; The aforementioned specific UL-RS is, A method of operation of a terminal device characterized by being assigned to different resources between the first and second base stations according to the UL-RS setting procedure between the first and second base stations, and being assigned to a resource different from the PUSCH of the second or first base station to which the terminal device is not connected.
  6. In base station devices, Memory containing instructions; and A base station device characterized by including a processor that, by executing the above command, allocates resources different from the specific UL-RS and PUSCH of the other base station when a specific UL-RS setting is made for a terminal in a cell that shares a frequency between the base station device of a specific communication network and another base station of another communication network.
  7. In Article 6, The specific UL-RS mentioned above is an SRS (Sounding Reference Signal), and The above processor is, Based on information sharing with the other base station in the above Cell, the resources allocated for SRS and resources allocated for PUSCH by the other base station are identified, and A base station device characterized by allocating resources allocated by the other base station for the SRS and PUSCH when setting up the SRS for a terminal, and allocating resources allocated by the other base station for the SRS when scheduling the PUSCH.

Description

Base station device and operating method of the device The present invention relates to a transmission technology for an uplink reference signal transmitted by a terminal to a base station. In NR (5G) using MIMO systems and high frequency ranges, instead of the Cell-Specific RS (CRS) allocated to the entire cell that has been used in LTE, various types of RS are defined to suit the various situations of the terminal (UE), and RS suitable for each beam of MIMO are exchanged, thereby evolving to respond to different frequency bands and various scenarios. As such, among the RS defined in 5G, the SRS (Sounding Reference Signal) is an uplink reference signal transmitted by a terminal (UE). By receiving the SRS of the terminal (UE), the base station (gNB) can obtain UL CSI (Channel State Information) for UL scheduling and link adaptation, and furthermore, can perform tasks such as DL channel estimation based on TDD channel reciprocity for optimal downlink (DL) transmission, non-codebook-based uplink transmission, codebook-based uplink transmission, and uplink beam management. Meanwhile, new frequencies for the newly emerging 6G (or subsequent generations) are being discussed primarily in high-frequency bands (e.g., FR3 - 7~24GHz) that are less favorable for coverage than existing LTE and 5G frequencies, and for 6G terminal coverage upon introduction, it is necessary to utilize low-frequency bands in 6G as well. However, since most low-frequency bands are already saturated and being utilized for existing mobile communication technologies such as LTE and 5G, as well as other services such as broadcasting, it is difficult to discover new ones. Therefore, in order to use low-frequency bands in 6G, it will eventually be necessary to share frequencies with existing 5G through spectrum sharing technology. Accordingly, the present invention proposes a method to accommodate the operation of a 6G terminal without affecting the operation of an existing 5G terminal in a cell where 5G and 6G share a frequency (i.e., where a 5G terminal and a 6G terminal operate in the same area and the same frequency band). FIG. 1 is an example diagram showing a cell environment in which 5G and 6G share a frequency in the present invention. Figure 2 is an example diagram illustrating the SRS settings operating in 5G. FIG. 3 is a block diagram specifically illustrating the configuration of a terminal device and a base station device according to an embodiment of the present invention. FIG. 4 is an example diagram illustrating a method for setting SRS in 5G and 6G according to the proposal of the present invention. FIG. 5 is an example diagram illustrating SRS setting information shared between 5G and 6G according to the proposal of the present invention. Figures 6 and 7 are call processing scenarios illustrating the SRS setup procedure between 5G and 6G according to an embodiment of the present invention. Hereinafter, various embodiments of the present invention will be described with reference to the attached drawings. The present invention relates to a transmission technology for an uplink reference signal transmitted by a terminal to a base station. In NR (5G) using MIMO systems and high frequency ranges, instead of the Cell-Specific RS (CRS) allocated to the entire cell that has been used in LTE, various types of RS are defined to suit the various situations of the terminal (UE), and RS suitable for each beam of MIMO are exchanged, thereby evolving to respond to different frequency bands and various scenarios. As such, among the RS defined in 5G, the SRS (Sounding Reference Signal) is an uplink reference signal transmitted by a terminal (UE). By receiving the SRS of the terminal (UE), the base station (gNB) can obtain UL CSI (Channel State Information) for UL scheduling and link adaptation, and furthermore, can perform tasks such as DL channel estimation based on TDD channel reciprocity for optimal downlink (DL) transmission, non-codebook-based uplink transmission, codebook-based uplink transmission, and uplink beam management. Meanwhile, new frequencies for the newly emerging 6G (or subsequent generations) are being discussed primarily in high-frequency bands (e.g., FR3 - 7~24GHz) that are less favorable for coverage than existing LTE and 5G frequencies, and for 6G terminal coverage upon introduction, it is necessary to utilize low-frequency bands in 6G as well. However, since most low-frequency bands are already saturated and being utilized for existing mobile communication technologies such as LTE and 5G, as well as other services such as broadcasting, it is difficult to discover new ones. Therefore, in order to use low-frequency bands in 6G, it will eventually be necessary to share frequencies with existing 5G through spectrum sharing technology. Accordingly, the present invention proposes a method to accommodate the operation of a 6G terminal without affecting the operation of an existing 5G terminal in a cell where 5G and 6G share a