WO2022153550A1 - Terminal, base station, and reception method - Google Patents

Abstract

Provided is a terminal comprising: a control unit for determining, on the basis of the notification signal transmitted from a base station, whether or not it is possible to use a reference signal to monitor paging on a paging opportunity; and a reception unit for receiving the reference signal when it is possible to use the reference signal.

Description

Terminals, base stations, and receiving methods

The present invention relates to terminals and base stations in wireless communication systems.

In 3GPP (3rd Generation Partnership Project), in order to realize further increase in system capacity, further increase in data transmission speed, further reduction in delay in wireless sections, etc., 5G or NR (New Radio) is used. The study of a wireless communication method called (hereinafter, the wireless communication method is referred to as "NR") is in progress. In NR, various radio technologies and network architectures are being studied in order to satisfy the requirement that the delay of the radio section be 1 ms or less while achieving a throughput of 10 Gbps or more.

In NR as well, paging is performed to call the terminal in the standby area when receiving an incoming call, as in LTE. In NR, the terminal in the RRC_IDLE state or the RRC_INACIVE state performs an intermittent reception operation for power saving in order to monitor the paging DCI (Non-Patent Document 1). In the intermittent reception operation, the period in which the terminal wakes up from the sleep state (Wake up) and performs paging monitoring is called PO (paging acquisition, paging opportunity). Hereinafter, the terminal in the RRC_IDLE state or the RRC_INACTIVE state may be referred to as an idle / inactive mode UE.

3GPP TS 38.304 V16.1.0 (2020-07)

When the idle / inactive mode UE in NR performs paging monitoring in PO (packing occupation), in order to perform time / frequency tracking and AGC (aut gain control) in advance, a plurality of SSB (synchronization) It is necessary to perform the reception process of.

However, compared to, for example, CRS (Cell-specific Reference Signal) in LTE, SSB is transmitted in a relatively long cycle, so that the terminal works up earlier than the PO reception timing due to SSB reception processing. Must. Therefore, it becomes impossible to secure a long sleep, which leads to an increase in terminal power consumption.

In addition to SSB, TRS (Tracking Reference Signal) or CSI-RS (Channel State Information Reference Signal) may be used for paging monitoring. Hereinafter, TRS or CSI-RS may be referred to as TRS / CSI-RS.

However, since it is unknown whether TRS or CSI-RS is transmitted from the base station in the terminal (idle / inactive mode UE), it is necessary to work up at an early stage as in the case of using only SSB. Therefore, it becomes impossible to secure a long sleep, which leads to an increase in terminal power consumption.

The present invention has been made in view of the above points, and an object of the present invention is to provide a technique capable of reducing the power consumption of a terminal in paging monitoring.

According to the disclosed technique, a control unit that determines whether or not a reference signal can be used to monitor paging at a paging opportunity based on a notification signal transmitted from a base station.
When the reference signal can be used, the receiving unit that receives the reference signal and the receiver
A terminal is provided.

According to the disclosed technology, a technology that makes it possible to reduce the power consumption of the terminal is provided in the monitoring of paging.

It is a figure for demonstrating the wireless communication system in embodiment of this invention. It is a figure for demonstrating the wireless communication system in embodiment of this invention. It is a figure which shows the operation example for paging monitoring. It is a figure which shows the operation example for paging monitoring. It is a figure which shows the basic operation example. It is a figure which shows the operation example for paging monitoring. It is a figure which shows the operation example for paging monitoring. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 1. FIG. It is a figure for demonstrating Example 2. FIG. It is a figure for demonstrating Example 2. FIG. It is a figure for demonstrating Example 3. FIG. It is a figure for demonstrating Example 3. FIG. It is a figure which shows an example of the functional structure of the base station 10 in embodiment of this invention. It is a figure which shows an example of the functional structure of the terminal 20 in embodiment of this invention. It is a figure which shows an example of the hardware composition of the base station 10 or the terminal 20 in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

Existing techniques are appropriately used in the operation of the wireless communication system according to the embodiment of the present invention. The existing technique is, for example, an existing NR, but is not limited to the existing NR.

Further, although the terms used in the existing NR or LTE specifications such as PUSCH, PDCCH, RRC, MAC, and DCI are used in this specification, the channel names and protocol names used in this specification, What is represented by a signal name, a function name, etc. may be called by another name.

(System configuration)
FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. The wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20 as shown in FIG. Although FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

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 radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Further, 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 a synchronization signal, system information, and the like to the terminal 20. Synchronous signals are, for example, NR-PSS and NR-SSS. The system information is transmitted by, for example, NR-PBCH or PDSCH, and is also referred to as broadcast information. As shown in FIG. 1, the base station 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Here, what is transmitted through a control channel such as PUCCH or PDCCH is called a control signal, and what is transmitted through a shared channel such as PUSCH or PDSCH is called data. Such a name is an example. Is.

The terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 on the DL and transmits the control signal or data to the base station 10 on the UL, thereby providing various types provided by the wireless communication system. Use communication services. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

FIG. 2 shows a configuration example of a wireless communication system when DC (Dual connectivity) is executed. As shown in FIG. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. Base station 10A and base station 10B are each connected to the core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

The cell group provided by the MN base station 10A is called an MCG (Master Cell Group), and the cell group provided by the SN base station 10B is called an SCG (Secondary Cell Group).

The processing operation in the present embodiment may be executed in the system configuration shown in FIG. 1, may be executed in the system configuration shown in FIG. 2, or may be executed in a system configuration other than these.

(Basic operation example)
Similar to LTE, NR also performs paging to call a terminal in the standby area when receiving an incoming call. In NR, the terminal 20 (idle / inactive mode UE) performs an intermittent reception operation for power saving in order to monitor the paging DCI (Non-Patent Document 1). In the intermittent reception operation, the period in which the terminal 20 wakes up from the sleep state (Wake up) and performs paging monitoring is called PO (paging opportunity, paging opportunity).

The terminal 20 monitors one PO per 1DRX cycle, for example. The PO consists of, for example, a plurality of slots.

As described above, when the idle / inactive mode UE in NR performs paging monitoring in PO (pagging acquisition), a plurality of SSBs are performed in order to perform time / frequency tracking and AGC (auto gain control) in advance. It is necessary to perform the reception process of (synchronization signal block). The number of SSBs received in advance depends on the reception quality.

With reference to FIG. 3, an operation example of the terminal 20 in the case of performing SSB reception before PO will be described. The upper side of FIG. 3 shows the reception operation of the SSB, and the lower side shows the power consumption of the terminal 20.

FIG. 3 shows an example in which the period of SSB is 20 ms and three SSBs are received before PO as an example. The terminal 20 sleeps for a long time before the timing of SSB indicated by A, and works up at the timing of SSB indicated by A. After receiving the SSB indicated by A, the sleep is performed, but since it is a sleep for a short time, some circuits need to be started, which consumes power. Similarly, SSB reception is performed at the timings of B and C, and paging monitoring is performed by PO.

(About issues)
However, since the SSB is transmitted in a relatively long cycle, the terminal 20 must work up early with respect to the PO reception timing for the SSB reception process. Therefore, it is not possible to secure a long sleep, which leads to an increase in terminal power consumption. In the example of FIG. 3, the sleep must be terminated for a long time from 60 ms before PO.

As described above, for paging monitoring, it is conceivable to use TRS / CSI-RS, which is a reference signal transmitted in a shorter cycle than SSB, in addition to or in place of SSB. That is, it is conceivable to perform time / frequency tracking and AGC (auto gain control) using TRS / CSI-RS. By using TRS / CSI-RS for paging monitoring, the terminal 20 can realize reduction in power consumption without additional resource overhead or the like.

However, TRS / CSI-RS is a reference signal for use by the terminal 20 (connected mode UE) in the RRC connected state, and is not always transmitted in the cell (and beam) in which the terminal 20 is located. do not have. For example, if there is no connected mode UE connected in the beam in the cell, the base station 10 determines that it is not necessary to transmit the TRS / CSI-RS, and the TRS / CSI-RS. Control may be performed so that RS is not transmitted.

If it is unclear whether TRS / CSI-RS is being transmitted, the terminal 20 cannot determine in advance at what timing it is sufficient to work up. Therefore, as in the case of using the SSB shown in FIG. 3, it is necessary to work up a time longer than PO, which increases the power consumption.

(Operation example when using TRS / CSI-RS)
An operation example for solving the above problems will be described below. In the present embodiment, the reference signal transmitted from the base station 10 (network) notifies the availability (effectiveness) of another reference signal transmitted after the reference signal. The terminal 20 can determine whether or not it is assumed that another reference signal is transmitted based on the information of the availability.

In the present embodiment, TRS / CSI-RS is mentioned as a reference signal used for notification of availability and a reference signal used for paging monitoring. This is an example, and TRS / A reference signal other than CSI-RS may be used. For example, (DM-RS: Demodulation reference signal), (PT-RS: Phase-tracking reference signal), (PRS: Positioning reference signal) and the like may be used.

Further, the reference signal used for notification of availability and the reference signal used for paging monitoring may be the same reference signal (eg, the same in TRS) or different reference signals (eg, one side). Is TRS and the other may be CSI-RS). Further, both the reference signal used for notification of availability and the reference signal used for paging monitoring may be signals other than the reference signal.

Hereinafter, the reference signal used for the notification of availability is also referred to as "availability notification reference signal". Further, the reference signal for paging monitoring is also referred to as "reference signal for paging monitoring". The "availability notification reference signal" may be referred to as a "notification signal".

FIG. 4 shows an operation example when it is assumed that the terminal 20 (idle / inactive mode UE) uses the paging monitoring reference signal by the above availability notification signal. FIG. 4 shows a case where TRS is used as a reference signal for paging monitoring as an example, but CSI-RS may be used instead of TRS. The upper side of FIG. 4 shows the reception operation of the TRS or the like, and the lower side shows the power consumption of the terminal 20.

It is assumed that the terminal 20 knows that the TRS shown in D and E of FIG. 4 is transmitted by the availability notification signal received from the base station 10. Further, the availability notification signal may be used to notify the timing of TRS shown in D and E, the time frequency resource, and the like.

The terminal 20 sleeps for a long time before the timing of SSB indicated by C, and works up at the timing of SSB indicated by C. In the case of FIG. 4, since the terminal 20 knows that the TRS can be received at the timings of D and C, it does not work up at the timing of SSB indicated by A as in the case of FIG.

The terminal 20 receives TRS at the timings of D and E, and performs paging monitoring at PO. In the example of FIG. 4, the terminal 20 receives SSB and TRS / CSI-RS before PO and after long-time sleep, but the terminal 20 receives TRS / CSI-RS before PO and after long-time sleep. It may be possible to receive only RS.

(Basic operation example)
A basic operation example will be described with reference to FIG. In S101, the terminal 20 receives the availability notification reference signal from the base station 10. Here, it is assumed that the terminal 20 can use the paging monitoring reference signal transmitted from the base station 10 by the availability notification reference signal.

The terminal 20 receives the paging monitoring reference signal at S102, executes monitoring at PO, and receives the PDCCH at S103. After S101, it corresponds to the operation shown in FIG.

The resources of the availability notification reference signal and the paging monitoring reference signal may be set in advance from the base station 10 to the terminal 20, or may be specified by specifications or the like.

(Example of availability notification reference signal)
In the present embodiment, the availability notification reference signal is not limited to a specific one, but for example, a reference signal (eg, TRS, CSI-RS) transmitted as a paging early indication (PEI) is used as the availability notification reference signal. You may. That is, the availability of the paging monitoring reference signal (eg, TRS, CSI-RS) that can be transmitted thereafter may be notified by the reference signal used as the PEI.

In the example shown in FIG. 6, the PEI (TRS) indicated by A notifies the TRS indicated by B and C. The position of the TRS shown in FIG. 6 is an example.

Information indicating whether or not it is necessary to monitor the paging occupation (PO) by PEI is simultaneously notified to the terminal 20. Therefore, if it is found that it is not necessary to monitor PO by PEI, the terminal 20 may not perform the reception processing of the paging monitoring reference signal regardless of the availability information.

Further, when it is found that the PO needs to be monitored by the PEI, the terminal 20 may perform the receiving processing of the paging monitoring reference signal based on the availability information.

As another example from PEI, for example, among the reference signals for paging monitoring for performing synchronization required for PO monitoring, the reference signal for which the time resource is set at the earliest timing is used as the availability notification reference signal. You may use it.

An example is shown in FIG. The TRS represented by A and B in FIG. 7 is a reference signal for paging monitoring. Of these, the TRS indicated by A in which the time resource is set at the earliest timing is used as the availability notification reference signal. For example, the terminal 20 determines the availability of the paging monitoring reference signal (TRS indicated by B) that can be transmitted thereafter based on the information of the availability notification in the TRS indicated by A.

Hereinafter, specific operation examples will be described as Examples 1 to 3. Examples 1 to 3 can be carried out in any combination.

(Example 1)
First, Example 1 will be described. The first embodiment is an embodiment relating to a method of notifying the availability of the paging monitoring reference signal by the availability notification reference signal.

In the first embodiment, the paging monitoring reference signal is used for one or two combinations or all combinations of the presence / absence of detection of the availability notification reference signal, the resource position of the availability notification reference signal, the access of the availability notification reference signal, and the like. The availability of the paging monitoring reference signal is notified by associating the availability (available) or the unavailability (not availability). Hereinafter, detailed examples will be described as Examples 1-1, 1-2, and 1-3.

<Example 1-1>
Example 1-1 is an example of associating the presence / absence of detection of the availability notification reference signal with the availability of the paging monitoring reference signal.

For example, the availability of the availability notification reference signal is associated with the availability of the subsequent paging monitoring reference signal, and the non-detection of the availability notification reference signal is associated with the unavailability of the subsequent paging monitoring reference signal.

For example, as shown in FIG. 8, when the terminal 20 detects the TRS-A as the availability notification reference signal transmitted from the base station 10, the terminal 20 has the TRS-B and the TRS as the paging monitoring reference signal. -C is determined to be available, and the reception processing of each of TRS-B and TRS-C is executed.

Further, as shown in FIG. 9, when the terminal 20 cannot detect TRS-A as the availability notification reference signal transmitted from the base station 10, the terminal 20 can detect TRS-B as the paging monitoring reference signal. And TRS-C are determined to be unusable, and neither TRS-B nor TRS-C reception processing is executed.

<Example 1-2>
Example 1-2 is an example of associating the resource position of the availability notification reference signal with the availability of the paging monitoring reference signal. The resource position of the availability notification reference signal may be the position of the time resource, the position of the frequency resource, or the position of the time / frequency resource. Hereinafter, the “resource position” means the position of the time resource, the position of the frequency resource, or the position of the time / frequency resource.

For example, the resource position 1 of the availability notification reference signal is associated with the availability of the paging monitoring reference signal, and the resource position 2 of the availability notification reference signal is associated with the unavailability of the paging monitoring reference signal. This correspondence-related information may be defined in specifications or the like, or may be notified from the base station 10 to the terminal 20 by RRC signaling, MAC CE, DCI, or the like.

An example will be explained with reference to the drawings. The examples shown in FIGS. 10 and 11 are examples in which the time resource position of the availability notification reference signal is used.

In the examples of FIGS. 10 and 11, among TRS-A and TRS-B which are availability notification reference signals, the time resource position of TRS-A which is ahead in time is associated with the unavailability of the paging monitoring reference signal. The time resource position of the TRS-B, which is later in time, is associated with the availability of the paging monitoring reference signal.

In the case of FIG. 10, since the terminal 20 detects TRS-B, it is determined that TRS-C and TRS-D, which are reference signals for paging monitoring, can be used, and reception processing of TRS-C and TRS-D is performed. I do. In this case, since the base station 10 determines that the TRS-C and the TRS-D are transmitted, the TRS-B of the TRS-A and the TRS-B is transmitted.

In the case of FIG. 11, since the terminal 20 detects TRS-A, it determines that the TRS-C and TRS-D reference signals for paging monitoring cannot be used, and receives the TRS-C and TRS-D. Do not do. In this case, since the base station 10 determines that the TRS-C and the TRS-D are not transmitted, the TRS-A of the TRS-A and the TRS-B is transmitted.

The examples shown in FIGS. 12 and 13 are examples in which the frequency resource position of the availability notification reference signal is used.

In the examples of FIGS. 12 and 13, among TRS-A and TRS-B which are availability notification reference signals, the frequency resource position of TRS-A is associated with the unavailability of the paging monitoring reference signal, and TRS- The frequency resource position of B is associated with the availability of a paging monitoring reference signal.

In the case of FIG. 12, since the terminal 20 detects TRS-B, it is determined that TRS-C and TRS-D, which are reference signals for paging monitoring, can be used, and reception processing of TRS-C and TRS-D is performed. I do. In this case, since the base station 10 determines that the TRS-C and the TRS-D are transmitted, the TRS-B of the TRS-A and the TRS-B is transmitted.

In the case of FIG. 13, since the terminal 20 detects TRS-A, it determines that the TRS-C and TRS-D reference signals for paging monitoring cannot be used, and receives the TRS-C and TRS-D. Do not do. In this case, since the base station 10 determines that the TRS-C and the TRS-D are not transmitted, the TRS-A of the TRS-A and the TRS-B is transmitted.

<Example 1-3>
Example 1-3 is an example of associating the availability / coding / scrambling / CDM of the availability notification reference signal with the availability of the paging monitoring reference signal.

"Sequence / encoding / Scramble / CDM" refers to the sequence (series) of the availability notification reference signal, the method of encoding the availability notification reference signal, the method of scrambling the availability notification reference signal, and the availability Notification reference signal. ) Means any one, any two, any three, or all of the methods. Hereinafter, "sequence / encoding / Scramble / CDM" will be referred to as "sequence information".

For example, when the sequence of the reference signal used as the availability notification reference signal is identified by the sequence ID, the sequence ID = N is associated with the availability of the paging monitoring reference signal, and the sequence ID = M is the paging monitoring reference. Correspond to the unavailability of signals. Here, N and M may be one numerical value, a plurality of numerical values, or a numerical range.

Information on the correspondence between "sequence / encoding / Scramble / CDM" and the availability of the paging monitoring reference signal may be defined in the specifications, etc., and RRC signaling from the base station 10 to the terminal 20 It may be notified by MAC CE, DCI, etc.

An example will be explained with reference to the drawings. The examples shown in FIGS. 14 and 15 are examples in which the access of the availability notification reference signal is used for association.

In the examples of FIGS. 14 and 15, the availability notification reference signal having the access ID = 0 is associated with the availability of the paging monitoring reference signal, and the availability notification reference signal having the access ID = 1 is the paging monitoring reference signal. Associated with unavailable.

In the case of FIG. 14, since the terminal 20 detects TRS-A with sequence ID = 0, it is determined that TRS-C and TRS-D, which are reference signals for paging monitoring, can be used, and TRS-C and TRS are used. -D reception processing is performed. In this case, since the base station 10 determines that the TRS-C and the TRS-D are transmitted, the TRS-A of the TRS-A and the TRS-B is transmitted.

In the case of FIG. 15, since the terminal 20 detects TRS-B with sequence ID = 1, it is determined that the paging monitoring reference signals TRS-C and TRS-D cannot be used, and TRS-C and TRS are determined. -D reception processing is not performed. In this case, since the base station 10 determines that the TRS-C and the TRS-D are not transmitted, the TRS-B of the TRS-A and the TRS-B is transmitted.

<About default operation>
In the first embodiment, the specifications and the like specify the default operation of the terminal 20 when the terminal 20 cannot detect both the availability notification reference signal corresponding to availability and the availability notification reference signal corresponding to unavailability. Alternatively, the base station 10 may notify the terminal 20 by RRC signaling, MAC CE, DCI, or the like.

The default operation is, for example, an operation assuming that the paging monitoring reference signal cannot be used. The default operation may be an operation assuming that the paging monitoring reference signal can be used, that is, an operation of receiving the paging monitoring reference signal.

According to the first embodiment, since the terminal 20 can determine whether or not the reference signal for paging monitoring can be used based on whether or not the reference signal for availability notification is received, the power consumption related to PO monitoring can be reduced.

(Example 2)
Next, Example 2 will be described. Example 2 may be carried out in combination with Example 1 or may be carried out independently of Example 1.

In the second embodiment, the availability notification reference signal notifies the availability of one or more specific paging monitoring reference signals. For example, the availability notification reference signal may notify how many paging monitoring reference signals at which resource position are available.

A combination of one or more of the information of the availability notification reference signal (eg, resource position, sequencing information), the number of paging monitoring reference signals notified of availability, the resource position, the sequencing information, and the like. The correspondence with the above may be specified in the specifications or the like, or the base station 10 may notify the terminal 20 by RRC signaling, MAC CE, DCI, or the like.

The terminal 20 can determine, for example, how many paging monitoring reference signals at which resource position are available based on the information of the detected availability notification reference signal based on the correspondence.

More specifically, for example, the availability of one or more paging monitoring reference signals based on the resource position or sequence information (or both the resource location and sequence information) of the availability notification reference signal, and the target of availability thereof. The resource position of one or more paging monitoring reference signals may be notified.

An example will be described with reference to FIGS. 16 and 17. In FIGS. 16 and 17, the resource indicated by A (referred to as resource A) is associated with the unavailability of the paging monitoring reference signal, and the resource indicated by B (referred to as resource B) is the paging monitoring reference signal. Associated with available.

Further, as the availability notification reference signal, TRS-A1 and TRS-A2 transmitted by the resource in resource A and TRS-B1 and TRS-B2 transmitted by the resource in resource B are set.

Further, among TRS-B1 and TRS-B2 associated with the availability of the paging monitoring reference signal, TRS-B1 is TRS-C among TRS-C to F which is the paging monitoring reference signal. It is associated with D, and TRS-B2 is associated with TRS-E and F.

Further, among TRS-A1 and TRS-A2 associated with the unavailability of the paging monitoring reference signal, for example, TRS-A1 is TRS-of the paging monitoring reference signals TRS-C to F. It is associated with C and D, and TRS-A2 is associated with TRS-E and F.

In the case of FIG. 16, it is assumed that the base station 10 determines that TRS-E and F are transmitted as the paging monitoring reference signal, and transmits TRS-B2 as the availability notification reference signal. At this time, when the terminal 20 detects TRS-B2, it determines that TRS-E and F have been transmitted, and performs reception processing of TRS-E and F.

In the case of FIG. 17, since the base station 10 determines that TRS-C and D are transmitted as the paging monitoring reference signal, it is assumed that TRS-B1 is transmitted as the availability notification reference signal. At this time, when the terminal 20 detects TRS-B1, it determines that TRS-C and D are being transmitted, and performs reception processing of TRS-C and D.

Further, for example, when the availability notification reference signal cannot be detected by the availability notification resource, it may be determined that the paging monitoring reference signal corresponding to the availability notification reference signal is transmitted.

For example, in the setting examples shown in FIGS. 16 and 17, when the terminal 20 detects TRS-A1 and does not detect any of TRS-A2, B1, and B2, TRS-E and F corresponding to TRS-A2. May be determined to have been transmitted and the reception processing of TRS-E and F may be performed.

Further, in the second embodiment, there may be a correspondence relationship of beam information (example: TCI state configuration) between the availability notification reference signal and the corresponding paging monitoring reference signal. Specifically, for example, the availability notification reference signal and the corresponding paging monitoring reference signal may have the same TCI status ID.

Further, in the second embodiment, there may be a correspondence relationship of QCL (Quasi-CoLocation) related information between the availability notification reference signal and the corresponding paging monitoring reference signal. Specifically, for example, the availability notification reference signal and the corresponding paging monitoring reference signal may have the same QCL type. Further, for example, the availability notification reference signal and the corresponding paging monitoring reference signal may have a QCL (quasi co-located) relationship.

Further, in the second embodiment, there may be a correspondence relationship regarding the antenna port between the availability notification reference signal and the corresponding paging monitoring reference signal. Specifically, for example, the availability notification reference signal and the corresponding paging monitoring reference signal may have the same antenna port. Further, for example, the availability notification reference signal and the corresponding paging monitoring reference signal may have antenna ports related to each other.

An operation example using the TCI state as an example will be described with reference to FIG. For example, it is assumed that TCI status ID = 1 is set for TRS-B1 and TCI status ID = 1 is also set for TRS-C and D corresponding to TRS-B1.

At this time, the terminal 20 can perform the reception processing of TRS-C and D assuming TCI status ID = 1 by detecting TRS-B2 having TCI status ID = 1.

According to the second embodiment, since the terminal 20 can determine the availability of the paging monitoring reference signal and the resource position based on the resource position of the availability notification reference signal, the power consumption related to PO monitoring can be reduced.

(Example 3)
Next, Example 3 will be described. Example 3 may be carried out in combination with either or both of Examples 1 and 2, or may be carried out independently of either of Examples 1 and 2.

In the third embodiment, the operation method of the terminal 20 when the terminal 20 detects one or a plurality of availability notification reference signals among the plurality of availability notification reference signals will be described. This operation method may be specified in specifications or the like, or may be notified from the base station 10 to the terminal 20 by RRC signaling, MAC CE, DCI, or the like.

For example, when a plurality of availability notification reference signals are set and the terminal 20 detects a plurality of availability notification reference signals, the terminal 20 receives each of the detected plurality of availability notification reference signals of the availability. Based on the information, the availability of the corresponding subsequent paging monitoring reference signal may be determined.

Further, when the terminal 20 detects a plurality of availability notification reference signals for notifying the availability of the paging monitoring reference signal, the terminal 20 detects the plurality of detected availability notification reference signals for the plurality of paging monitoring references. Reception processing may be performed on one or more paging monitoring reference signals of a part of the signals. Which one or more of the paging monitoring reference signals among the plurality of paging monitoring reference signals should be subjected to the reception processing may be specified in the specifications or the like, and the base station 10 to the terminal 20 may be specified. , RRC signaling, MAC CE, DCI, etc. may be notified.

An example will be described with reference to FIG. The signal settings in FIG. 18 are the same as those in FIGS. 16 and 17. That is, the resource indicated by A (referred to as resource A) is associated with the availability of the paging monitoring reference signal, and the resource indicated by B (referred to as resource B) is associated with the availability of the paging monitoring reference signal. Has been done.

Further, as the availability notification reference signal, TRS-A1 and TRS-A2 transmitted by the resource in resource A and TRS-B1 and TRS-B2 transmitted by the resource in resource B are set. Further, among TRS-B1 and TRS-B2 associated with the availability of the paging monitoring reference signal, TRS-B1 is TRS-C among TRS-C to F which is the paging monitoring reference signal. It is associated with D, and TRS-B2 is associated with TRS-E and F.

When the terminal 20 detects both TRS-B1 and TRS-B2, for example, the terminal 20 can use TRS-C, D corresponding to TRS-B1 and TRS-E, F corresponding to TRS-B2. It is determined that there is, and these reception processes are performed.

Further, for example, when a plurality of availability notification reference signals indicating the availability of the paging monitoring reference signal are detected, the availability notification reference of only a specific resource (eg, the first resource (or the last resource) in time) is referred to. It is assumed that a provision or setting is made that "a reference signal for paging monitoring corresponding to the signal can be used". In this case, in the case of FIG. 18, the terminal 20 has TRS-C, D according to the regulation or setting. Only or only TRS-E and F are used as reference signals for paging monitoring.

Further, for example, when the terminal 20 first detects one of the availability notification reference signals in a certain set of availability notification reference signals, it is not necessary to try to detect the subsequent availability notification reference signals in the set. It may be that. In this case, the terminal 20 determines the availability of the subsequent paging monitoring reference signal corresponding to the availability notification reference signal based on the availability information of the availability notification reference signal detected first, and if it is available, the terminal 20 determines whether or not the subsequent paging monitoring reference signal corresponding to the availability notification reference signal is available. Performs reception processing.

Further, when the terminal 20 detects one of the availability notification reference signals transmitted by the resource corresponding to availability among the availability notification reference signals of a certain set, the subsequent availability notification reference signals in the set are detected. It may not be necessary to try to detect.

Further, when the terminal 20 detects any of the availability notification reference signals transmitted by the resource corresponding to the availability among the availability notification reference signals of a certain set, the subsequent availability notification reference signals in the set are detected. It may not be necessary to try to detect.

An example will be described with reference to FIG. In the example of FIG. 19, "when the terminal 20 detects one of the availability notification reference signals of a set of availability notification reference signals transmitted by the resource corresponding to availability, the subsequent availability notification reference signals in the set. It is assumed that there is no need to try to detect the availability notification reference signal of "."

In this case, the above set has TRS-A1, A2, B1, B2. As shown in FIG. 19, when the terminal 20 detects TRS-B1, it determines that TRS-C and D corresponding to TRS-B1 can be used without attempting to detect TRS-B2, and TRS- The reception processing of C and D is executed.

According to the third embodiment, for example, when one of the plurality of availability notification reference signals is received, it is not necessary to try to receive the subsequent availability notification reference signals. , Efficient reception processing can be performed.

(Device configuration)
Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described so far will be described. The base station 10 and the terminal 20 include a function of carrying out the above-described first to third embodiments. However, the base station 10 and the terminal 20 may each have only the functions of any one of the first to third embodiments.

<Base station 10>
FIG. 20 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. 20, the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 20 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed. The transmitting unit 110 and the receiving unit 120 may be referred to as a communication unit.

The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL data, etc. to the terminal 20. Further, the transmission unit 110 transmits the notification signals and the like described in the first to third embodiments to the terminal 20.

The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them out from the storage device as needed.

The control unit 140, for example, allocates resources, controls the entire base station 10, and the like. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120. Further, the transmitter 110 and the receiver 120 may be referred to as a transmitter and a receiver, respectively.

<Terminal 20>
FIG. 21 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. 21, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 21 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed. The transmitting unit 210 and the receiving unit 220 may be referred to as a communication unit.

The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer.

The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, information such as the correspondence relationship described in the first to third embodiments.

The control unit 240 controls the paging monitoring in the PO based on the notification signal received from the base station 10. For example, it is determined whether or not to perform paging monitoring in PO using TRS / CSI-RS. The signal transmission function unit of the control unit 240 may be included in the transmission unit 210, and the signal reception function unit of the control unit 240 may be included in the reception unit 220. Further, the transmitter 210 and the receiver 220 may be referred to as a transmitter and a receiver, respectively.

The present embodiment provides at least the terminals, base stations, and receiving methods described in each of the following sections.
(Section 1)
Based on the notification signal transmitted from the base station, a control unit that determines whether or not a reference signal can be used to monitor paging at a paging opportunity, and a control unit.
When the reference signal can be used, the receiving unit that receives the reference signal and the receiver
A terminal equipped with.
(Section 2)
Whether or not the control unit can use the reference signal based on whether or not the notification signal is detected, the resource position of the notification signal, and at least one of the sequence information of the notification signal. The terminal described in paragraph 1 to determine whether or not.
(Section 3)
The control unit determines whether or not one or more reference signals at a specific resource position are available based on the resource position of the notification signal and at least one of the sequence information of the notification signal. The terminal according to item or item 2.
(Section 4)
The terminal according to any one of items 1 to 3, wherein the receiving unit does not attempt to detect a notification signal after the notification signal when receiving a certain notification signal among a plurality of notification signals. ..
(Section 5)
A control unit that determines whether to transmit a reference signal,
A transmitter that transmits a notification signal to the terminal indicating whether or not the reference signal can be used to monitor paging at a paging opportunity, and a transmitter.
Base station with.
(Section 6)
Based on the notification signal transmitted from the base station, the step of determining whether or not the reference signal can be used to monitor paging at the paging opportunity, and
When the reference signal can be used, the step of receiving the reference signal and
The receiving method executed by the terminal.

By any of the items 1 to 6, it is possible to reduce the power consumption of the terminal in the monitoring of paging. In particular, according to the second item, the terminal 20 can determine whether or not the reference signal can be used based on whether or not the notification signal is received. Further, according to the third item, the terminal 20 can determine the availability of the reference signal, the resource position, and the like based on the resource position and the like of the notification signal. Further, according to the fourth item, efficient reception processing can be performed.

(Hardware configuration)
The block diagrams (FIGS. 20 and 21) used in the description of the above embodiment show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are broadcasting, notification, communication, forwarding, configuration, reconfiguration, allocation, mapping, etc., but these are limited. I can't. For example, a functional block (constituent unit) that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.

For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 22 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like. For example, the control unit 140, the control unit 240, and the like described above may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 140 of the base station 10 shown in FIG. 20 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Further, for example, the control unit 240 of the terminal 20 shown in FIG. 21 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium, and is, for example, a ROM (Read Only Memory), an EPROM (Erasable Program ROM), an EEPROM (Electrically Erasable Program ROM), a RAM (Random Memory), a RAM (Random Memory), or the like. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like. The auxiliary storage device 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of. For example, the transmission / reception antenna, the amplifier unit, the transmission / reception unit, the transmission line interface, and the like may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

Further, the base station 10 and the terminal 20 are a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logical Device) hardware, an FPGA (Proge), and an FPGA (FPGA). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed inventions are not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and items described in two or more items may be used in combination as necessary, and items described in one item may be used in combination with another item. It may be applied (as long as there is no contradiction) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. Regarding the processing procedure described in the embodiment, the processing order may be changed as long as there is no contradiction. For convenience of processing description, the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access) Signaling). It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRC Signaling Setup) message, an RRC connection reconfiguration (RRC Signaling Configuration) message, or the like.

Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5G). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and extensions based on them. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station 10 in the present specification may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station 10, various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (news). For example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..

The information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

Note that the terms explained in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (eg, PUSCH, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are limited in any way. It's not a good name.

In the present disclosure, "base station (BS: Base Station)", "radio base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB ( gNB) ”,“ access point ”,“ transmission point ”,“ reception point ”,“ transmission / reception point (transmission / reception point) ”,“ cell ”,“ sector ”,“ Terms such as "cell group", "carrier", and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by Remote Radio Head). The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.

In the present disclosure, terms such as "mobile station (MS: Mobile Station)", "terminal (user terminal)", "terminal (UE: User Equipment)", and "terminal" can be used interchangeably.

Mobile stations are subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, terminals, depending on the trader. , Wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

Further, the base station in the present disclosure may be read by the terminal. For example, a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 (for example, it may be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the above. In this case, the terminal 20 may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

Similarly, the terminal in the present disclosure may be read as a base station. In this case, the base station may have the functions of the terminal described above.

The terms "determining" and "determining" used in the present disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (closing up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Further, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Acquiring) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, selecting, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connections or connections between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first" and "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.

The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device", or the like.

When used in the present disclosure are "include," "include," and variants thereof, these terms are as comprehensive as the term "comprising." Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.

The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Frequency Domain), number of symbols per TTI, wireless frame configuration, transmitter / receiver. At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiple Access) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time region. Slots may be time units based on new melody.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one minislot is called TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (RE: Resource Elements). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

The bandwidth portion (BWP: Bandwidth Part) (which may also be referred to as partial bandwidth or the like) may represent a subset of consecutive common RBs (common resources blocks) for a certain neurology in a carrier. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

The above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.

In the present disclosure, when articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are plural.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

In the present disclosure, the SS block or CSI-RS is an example of a synchronization signal or a reference signal.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification mode without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.

10 Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (6)

Based on the notification signal transmitted from the base station, a control unit that determines whether or not a reference signal can be used to monitor paging at a paging opportunity, and a control unit.
When the reference signal can be used, the receiving unit that receives the reference signal and the receiver
A terminal equipped with. Whether or not the control unit can use the reference signal based on whether or not the notification signal is detected, the resource position of the notification signal, and at least one of the sequence information of the notification signal. The terminal according to claim 1. A claim that the control unit determines whether or not one or more reference signals at a specific resource position are available based on at least one of the resource position of the notification signal and the sequence information of the notification signal. The terminal according to 1 or 2. The terminal according to any one of claims 1 to 3, wherein the receiving unit does not attempt to detect a notification signal after the notification signal when a certain notification signal among a plurality of notification signals is received. A control unit that determines whether to transmit a reference signal,
A transmitter that transmits a notification signal to the terminal indicating whether or not the reference signal can be used to monitor paging at a paging opportunity, and a transmitter.
Base station with. Based on the notification signal transmitted from the base station, the step of determining whether or not the reference signal can be used to monitor paging at the paging opportunity, and
When the reference signal can be used, the step of receiving the reference signal and
The receiving method executed by the terminal.

Images