JP-7856739-B2 - Terminals and communication methods

Inventors

• ▲高▼橋 優元
• 永田 聡

Assignees

• 株式会社ＮＴＴドコモ

Dates

Publication Date

20260511

Application Date

20220215

Claims (5)

1. A receiving unit that receives setting information for the intermittent reception function from the base station, A control unit that enables the intermittent reception function by the base station in response to receiving the aforementioned setting information, When the intermittent reception function of the base station is enabled, the transmitting unit transmits a signal when drx-onDurationTimer is running, Equipped with , The receiving unit receives information instructing the base station to enable or disable the terminal-side function of the intermittent reception function. Terminal.
2. The information that instructs the terminal-side function of the intermittent reception function by the base station to be enabled or disabled is a DCI field, the bit size of the DCI field is 1 bit, the enabled state is indicated by a value of 1, and the disabled state is indicated by a value of 0. The terminal according to claim 1 .
3. The DCI field is included in the DCI format that instructs the base station to enable or disable the terminal-side function of the intermittent reception function , The terminal according to claim 2 .
4. The DCI format is scrambled by the RNTI related to the intermittent reception function of the base station. The terminal according to claim 3 .
5. The steps include receiving setting information for the intermittent reception function from the base station, The steps include: enabling the intermittent reception function by the base station in response to receiving the aforementioned configuration information; If the intermittent reception function of the base station is enabled, the step of transmitting a signal when drx-onDurationTimer is running, Equipped with , The receiving step involves receiving information that instructs the base station to enable or disable the terminal-side function of the intermittent reception function. The communication method used by the terminal.

Description

This invention relates to a terminal, base station, and communication method in a wireless communication system. In NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies are being considered to meet requirements such as large-capacity systems, high-speed data transmission rates, low latency, simultaneous connection of numerous terminals, low cost, and low power consumption (for example, Non-Patent Document 1). NR Release 18 discusses energy-saving specifications for base stations. Further details are to be considered in the future. 3GPP TS 38.300 V16.6.0 (2021-06) This figure illustrates a wireless communication system according to an embodiment of the present invention.This is a diagram illustrating CDRX in NR Release 15.This is a diagram illustrating WUS in NR Release 16.This figure illustrates the intermittent reception of a base station according to Embodiment 1 of the present invention.This figure illustrates the parameters related to Example 1 of the embodiment of the present invention.This figure shows an example of the functional configuration of a base station according to an embodiment of the present invention.This figure shows an example of the functional configuration of a terminal according to an embodiment of the present invention.This figure shows an example of the hardware configuration of a base station or terminal according to an embodiment of the present invention.This figure shows an example of the configuration of a vehicle according to an embodiment of the present invention. The embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the embodiments described below. In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies may be used as appropriate. Such existing technologies include, for example, existing NR or LTE, but are not limited to existing NR or LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later technologies (e.g., NR), unless otherwise specified. Furthermore, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in existing LTE systems, will be used. This is for convenience of description, and similar signals, functions, etc., may be called by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even if a signal is used in NR, it is not necessarily explicitly stated as "NR-". Furthermore, in the embodiments of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or any other system (for example, a Flexible Duplex). Furthermore, in the embodiments of the present invention, "configuring" wireless parameters, etc., may mean that predetermined values are pre-configured, or that wireless parameters notified from a base station or terminal are configured. (System configuration) Figure 1 is a diagram illustrating an embodiment of the wireless communication system according to the present invention. A wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Although Figure 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple base stations 10 and terminal 20. The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. In addition, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe. The base station 10 transmits synchronization signals and system information to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via NR-PBCH, and is also called broadcast information. The synchronization signals and system information may also be called SSB (SS/PBCH block). As shown in Figure 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via