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摘要

A timing control method, performed by a first DU including a processor and a modem in a base station supporting function-splitting, includes obtaining, by the processor, first time information from a CU included in the base station; obtaining, by the processor, synchronization information with a first system based on the first time information; identifying, by the processor, a change time point of an SFN based on the synchronization information; generating, by the processor, a first timing control signal including a signal indicating a changed SFN and a first tick signal having a same periodicity as a change periodicity of the SFN when the SFN is changed; and providing, by the processor, the first timing control signal to the modem.

說明書

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Korean Patent Applications No. 10-2019-0145442 filed on Nov. 13, 2019 and No. 10-2020-0150272 filed on Nov. 11, 2020 with the Korean Intellectual Property Office (KIPO), the entire contents of which are hereby incorporated by reference.

BACKGROUND 1. Technical Field

The present disclosure relates to a method and an apparatus for timing control in a wireless communication system, and more specifically, to a method and an apparatus for timing control in a wireless communication system that dynamically supports function-splitting.

2. Description of Related Art

With the development of information and communication technology, various wireless communication technologies have been developed. Typical wireless communication technologies include long term evolution (LTE) and new radio (NR), which are defined in the 3rd generation partnership project (3GPP) standards. The LTE may be one of 4th generation (4G) wireless communication technologies, and the NR may be one of 5th generation (5G) wireless communication technologies. In order to process soaring wireless data after commercialization of the 4G communication system (e.g., communication system supporting the LTE), the 5G communication system (e.g., communication system supporting the NR) using a frequency band (e.g., frequency band of 6 GHz or above) higher than a frequency band (e.g., frequency band of 6 GHz or below) of the 4G communication system as well as the frequency band of the 4G communication system is being considered.

權(quán)利要求

1

What is claimed is:

1. A timing control method, performed by a first distributed unit (DU) including a processor and a modulator and demodulator (modem) in a base station supporting function-splitting, the timing control method comprising:obtaining, by the processor, first time information from a central unit (CU) included in the base station;

obtaining, by the processor, synchronization information with a first system based on the first time information;

identifying, by the processor, a change time point of a system frame number (SFN) based on the synchronization information;

generating, by the processor, a first timing control signal including a signal indicating a changed SFN and a first tick signal having a same periodicity as a change periodicity of the SFN when the SFN is changed;

determining, by the processor, one or more subframe numbers of one or more subframes based on the change time point of the SFN;

determining, by the processor, a change time point of each of the one or more subframe numbers;

generating, by the processor, a second timing control signal including a signal indicating a changed subframe number and a second tick signal having a same periodicity as a change periodicity of the subframe number at the change time point of each of the one or more subframe numbers;

determining, by the processor, one or more slot numbers of one or more slots constituting the one or more subframes;

determining, by the processor, a change time point of each of the one or more slot numbers based on the change time point of each of the one or more subframe numbers;

generating, by the processor, a third timing control signal including a signal indicating a changed slot number and a third tick signal indicating a change of the slot number at the change time point of each of the one or more slot numbers;

determining, by the processor, one or more symbol numbers of one or more symbols constituting the one or more slots;

determining, by the processor, a change time point of each of the one or more symbol numbers based on the change time point of each of the one or more slot numbers;

generating, by the processor, a fourth timing control signal including a changed symbol number and a fourth tick signal indicating a change of the symbol number at the change time point of each of the one or more symbol numbers; and

providing, by the processor, the first timing control signal, the second timing control signal, the third timing control signal, and the fourth timing control signal to the modem.

2. The timing control method according to claim 1, wherein the synchronization information with the first system is provided from the CU that has previously performed synchronization with the first system to the first DU, based on the first time information.

3. The timing control method according to claim 2, wherein the first time information is coordinated universal time (UTC) information, and the first system is a global positioning system (GPS).

4. The timing control method according to claim 1, wherein the timing control method is performed in a synchronization plane (S-plane) of the first DU.

5. The timing control method according to claim 1, wherein the obtaining of the first time information is performed based on IEEE 1588 protocol.

6. A first distributed unit (DU) included in a base station supporting function-splitting, the first DU comprising:a processor;

a modulator and demodulator (MODEM);

a memory electronically communicating with the processor; and

instructions stored in the memory,

wherein when executed by the processor, the instructions cause the first DU to:obtain, by the processor, first time information from a central unit (CU) included in the base station;

obtain, by the processor, synchronization information with a first system based on the first time information;

identify, by the processor, a change time point of a system frame number (SFN) based on the synchronization information;

generate, by the processor, a first timing control signal including a signal indicating a changed SFN and a first tick signal having a same periodicity as a change periodicity of the SFN when the SFN is changed;

determine, by the processor, one or more subframe numbers of one or more subframes based on the change time point of the SFN;

determine, by the processor, a change time point of each of the one or more subframe numbers;

generate, by the processor, a second timing control signal including a signal indicating a changed subframe number and a second tick signal having a same periodicity as a change periodicity of the subframe number at the change time point of each of the one or more subframe numbers;

determine, by the processor, one or more slot numbers of one or more slots constituting the one or more subframes;

determine, by the processor, a change time point of each of the one or more slot numbers based on the change time point of each of the one or more subframe numbers;

generate, by the processor, a third timing control signal including a signal indicating a changed slot number and a third tick signal indicating a change of the slot number at the change time point of each of the one or more slot numbers;

determine, by the processor, one or more symbol numbers of one or more symbols constituting the one or more slots;

determine, by the processor, a change time point of each of the one or more symbol numbers based on the change time point of each of the one or more slot numbers;

generate, by the processor, a fourth timing control signal including a changed symbol number and a fourth tick signal indicating a change of the symbol number at the change time point of each of the one or more symbol numbers; and

provide, by the processor, the first timing control signal, the second timing control signal, the third timing control signal, and the fourth timing control signal to the modem.

7. The first DU according to claim 6, wherein the synchronization information with the first system is provided from the CU that has previously performed synchronization with the first system to the first DU, based on the first time information.

8. The first DU according to claim 7, wherein the first time information is coordinated universal time (UTC) information, and the first system is a global positioning system (GPS).

9. A timing control method, performed by a first communication node including a processor and a modulator and demodulator (MODEM) in a base station supporting function-splitting, the timing control method comprising:obtaining, by the processor, first time information from a second communication node included in the base station;