Terminal and base station

Abstract

This terminal comprises: a receiving unit that receives, from a base station, setting information of a positioning reference signal, and receives, from the base station, MAC CE that activates or deactivates a muting pattern of the setting information; and a control unit that determines whether to receive the positioning reference signal on the basis of the muting pattern which has been activated or deactivated.

Description

Technical Field

[0001] The present invention relates to a terminal and a base station in a wireless communication system.

Background Art

[0002] In 3GPP (3rd Generation Partnership Project), in order to achieve further increase in system capacity, further increase in data transmission speed, further reduction in latency in a radio section, etc., a wireless communication method called 5G or NR (New Radio) (hereinafter, this wireless communication method is referred to as "NR") is being studied. In 5G, in order to satisfy the requirement of achieving a throughput of 10 Gbps or more and reducing the latency in the radio section to 1 ms or less, various wireless technologies and network architectures are being studied.

[0003] In addition, the study of Positioning for performing positioning using a reference signal or the like is underway. As a method of Positioning, for example, there is a method in which a terminal receives a downlink reference signal (DL-PRS (Positioning Refernece Signal)) from a plurality of base stations and performs positioning based on the time difference of reception timings (for example, Non-Patent Documents 1 and 2).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Regarding DL-PRS, in the prior art disclosed in Non-Patent Document 1 and the like, Periodic DL-PRS is supported. However, in the Periodic DL-PRS in the prior art, resources and the like cannot be activated or deactivated as needed, so the use of resources may be inefficient.

[0006] The present invention has been made in view of the above points, and an object thereof is to provide a technology that enables efficient use of resources of a reference signal used for positioning.

Means for Solving the Problems

[0007] According to the disclosed technology, a receiving unit that receives setting information of a positioning reference signal from a base station and receives a MAC CE from the base station that activates or deactivates a muting pattern in the setting information, a control unit that determines whether to receive a positioning reference signal based on the muting pattern to which the activation or the deactivation is applied, are provided A terminal, when the time of a timer has elapsed since the time when activation or deactivation is applied to a target by a MAC CE, the control unit determines that the target has been deactivated or activated a terminal is provided.

Effects of the Invention

[0008] According to the disclosed technology, a technology that enables efficient use of resources of a reference signal used for positioning is provided.

Brief Description of the Drawings

[0009]

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Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. The existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.

[0012] Also, in this specification, the interpretation of the bit values 0 and 1 may be the reverse of the interpretation in the following description. For example, when 0 represents mute and 1 represents transmission in the following description, 0 and 1 may be reversed so that 1 represents mute and 0 represents transmission.

[0013] (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. 1. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each. For example, a plurality of base stations that are the transmission sources of the PRS received by the terminal 20 may be provided.

[0014] 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 symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Also, the TTI (Transmission Time Interval) in the time domain may be a slot or a subframe.

[0015] The base station 10 can perform carrier aggregation to communicate with the terminal 20 by bundling a plurality of cells (a plurality of CCs (Component Carriers)). In carrier aggregation, one PCell (Primary Cell) and one or more SCell (Secondary Cells) are used.

[0016] The base station 10 transmits synchronization signals, system information, etc. to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, by NR-PBCH or PDSCH, and is also referred to as broadcast information. As shown in FIG. 1, the base station 10 transmits control signals or data to the terminal 20 in the DL (Downlink) and receives control signals or data from the terminal 20 in the UL (Uplink). Here, what is transmitted on control channels such as PUCCH and PDCCH is called a control signal, and what is transmitted on shared channels such as PUSCH and PDSCH is called data, but such a naming method is just an example.

[0017] The terminal 20 is a communication device equipped with 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 control signals or data from the base station 10 in the DL and transmits control signals or data to the base station 10 in the UL, thereby using various communication services provided by the wireless communication system. Note that the terminal 20 may be called a UE, and the base station 10 may be called a gNB.

[0018] The terminal 20 can perform carrier aggregation to communicate with the base station 10 by bundling a plurality of cells (a plurality of CCs (Component Carriers)). In carrier aggregation, one PCell (Primary Cell) and one or more SCell (Secondary Cells) are used. Also, PUCCH-SCell having PUCCH is also used.

[0019] 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. The base station 10A and the base station 10B are each connected to a core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

[0020] A cell group provided by the base station 10A which is the MN is called an MCG (Master Cell Group), and a cell group provided by the base station 10B which is the SN is called an SCG (Secondary Cell Group). Also, in DC, the MCG is composed of one PCell and one or more SCells, and the SCG is composed of one PSCell (Primary SCell) and one or more SCells.

[0021] The processing operations in the present embodiment may be executed with the system configuration shown in FIG. 1, may be executed with the system configuration shown in FIG. 2, or may be executed with system configurations other than these.

[0022] (Basic operation example) With reference to FIG. 3, a basic operation example of the communication system in the embodiment of the present invention will be described. This operation is basically a common operation for Examples 1 to 4 described later.

[0023] In S101, by RRC signaling, the base station 10 transmits DL-PRS resource setting information to the terminal 20, and the terminal 20 receives the resource setting information. The resource setting information includes setting information of a DL-PRS resource set including one or more DL-PRS resources, a muting option, a resource type, etc. The setting information here may be, for example, the NR-DL-PRS-Info described in Non-Patent Document 1 with the information of the resource type added.

[0024] The resource type may be the resource type of the DL-PRS resource unit or the resource type of the DL-PRS resource set. The resource type is, for example, one of three types: periodic, semi-persistent, and aperiodic, and one or more of these resource types are set for the terminal 20.

[0025] Also, before S101, the terminal 20 may transmit capability information regarding DL-PRS (e.g., whether it supports semi-persistent) to the base station 10, and based on this capability information, the RRC in S101 may perform the setting.

[0026] It is assumed that for the terminal 20 set with the semi-persistent resource type, the DL-PRS resources set by the RRC are activated or deactivated by the MAC CE. Note that the DL-PRS with the semi-persistent resource type may be referred to as "Semi-persistent DL-PRS".

[0027] Also, regarding the DL-PRS resources / DL-PRS resource sets or muting patterns set in S101, for example, for semi-persistent DL-PRS, they may be set with parameters different from those defined in Rel-16 described in Non-Patent Document 1.

[0028] In S102, the base station 10 transmits to the terminal 20 a MAC CE for activating or deactivating the DL-PRS resources / DL-PRS resource sets or muting patterns, and the terminal 20 receives the said MAC CE.

[0029] In S103, the terminal 20 receives, for example, the DL-PRS of the serving cell on the activated DL-PRS resource, receives the DL-PRS of the neighboring cell on the DL-PRS resource where muting is specified in the activated muting pattern, and transmits these reception timings to the positioning server. Alternatively, the terminal 20 itself may perform positioning based on these reception timings.

[0030] That is, the terminal 20 can determine whether to receive the DL-PRS based on the muting pattern to which activation or deactivation is applied. Also, the base station 10 can determine whether to transmit the DL-PRS based on the muting pattern to which activation or deactivation is applied.

[0031] Note that activating / deactivating the muting pattern may mean enabling (using) / disabling (not using) the entire muting pattern (bitmap), or changing the value of the bits in the muting pattern (bitmap).

[0032] When activating / deactivating the muting pattern means changing the value of the bits in the muting pattern (bitmap), changing 0 to 1 (i.e., changing the mute state to the transmission state) may be called activation, and changing 1 to 0 (i.e., changing the transmission state to the mute state) may be called deactivation. Or changing 0 to 1 (i.e., changing the mute state to the transmission state) may be called deactivation, and changing 1 to 0 (i.e., changing the transmission state to the mute state) may be called activation (activating the mute).

[0033] Fig. 4 shows an example of a DL-PRS resource set configured by parameters included in the configuration information of the DL-PRS resource set. As shown in Fig. 4, the DL-PRS resource set includes a plurality of DL-PRS resources, and the plurality of DL-PRS resources are repeated.

[0034] Fig. 5 shows an example of a DL-PRS resource. As shown in Fig. 5, each DL-PRS resource starts from an offset time position. Fig. 6 illustrates a single DL-PRS resource at the RE (resource element) level. Based on the illustrated parameters, the signal is mapped to the RE.

[0035] Figs. 7 and 8 are diagrams for explaining an example of the muting option. In the resource configuration information of the DL-PRS, the time position of the DL-PRS transmission / muting is specified by a muting pattern which is a bitmap, but the interpretation of the bitmap is different between muting option 1 and muting option 2.

[0036] When muting option 1 is set, the bits of the muting pattern mean the DL-PRS resource set. When muting option 2 is set, the bits of the muting pattern mean the DL-PRS resource. When both muting option 1 and muting option 2 are set, the logical AND of each bit of the muting pattern in muting option 1 and all bits of the muting pattern in muting option 2 is taken.

[0037] The upper part of Fig. 7 shows the case where the muting pattern of muting option 1 is 1101, indicating that the transmission time part corresponding to 0 in the periodically transmitted DL-PRS resource set is muted (no DL transmission). Transmission is performed in the part corresponding to 1.

[0038] The lower side of FIG. 7 shows the case where the muting pattern of muting option 2 is 1101, indicating that the DL transmission by the DL-PRS resource at the time position corresponding to 0 in the DL-PRS resource set is muted.

[0039] FIG. 8 shows the case where both the muting pattern 1101 of muting option 1 and the muting pattern 1101 of muting option 2 are set. For the part corresponding to 1 in the periodically transmitted DL-PRS resource set, the muting pattern 1101 of muting option 2 is applied, and for the part corresponding to 0 in the periodically transmitted DL-PRS resource set, the muting pattern 0000 (the result of logical AND) of muting option 2 is applied.

[0040] Hereinafter, as more specific operation examples in this embodiment, Examples 1 to 4 will be described.

[0041] (Example 1) Example 1 is an example regarding activation or deactivation by MAC CE for the muting pattern of DL-PRS. Note that "activation or deactivation" may be described as "activate / deactivate".

[0042] In Example 1, in S102 of FIG. 3, the base station 10 transmits a MAC CE for activating / deactivating the muting pattern of DL-PRS to the terminal 20. The terminal 20 activates / deactivates based on the information of the MAC CE received from the base station 10, the value of the bit of the muting pattern (bitmap) set in the RRC. Note that the number of bits of the bitmap is, for example, 2, 4, 8, 16, or 32, but is not limited thereto.

[0043] Hereinafter, more specific examples in Example 1 will be described as Example 1-1 and Example 1-2.

[0044] <Example 1-1> In Example 1-1, one bit in the muting pattern corresponds to one bit in the MAC-CE.

[0045] An example of the MAC CE in Example 1-1 is shown in FIG. 9. In the MAC CE shown in FIG. 9(b), the MAC CE is applied in the BWP indicated by the value of the BWP ID in the cell indicated by the Serving Cell ID of OCT1 (Octet 1). "R" is a reserved bit. The MAC CE may include the ID of the DL-PRS resource set or the ID of the DL-PRS resource for which the muting pattern is to be activated / deactivated. The same applies to the MAC CE shown in other figures.

[0046] One bit of S shown after OCT2 i corresponds to one bit in the muting pattern.

[0047] For one bit in the muting pattern set by RRC, the operation of applying one bit of S of the MAC CE i may be a logical product, a logical sum, an exclusive logical sum, or replacing the bit value of S of the MAC CE regardless of the original value, or other operations. For example, the terminal 20 assumes transmission / muting of the DL-PRS according to the muting pattern after each bit of the corresponding S i has been applied to each bit in the muting pattern set by RRC. For example, at the time position where transmission of the DL-PRS is assumed, reception of the DL-PRS is performed, and at the time position where muting of the DL-PRS is assumed, reception of the DL-PRS is not performed. i

[0048] Regarding whether each bit in the muting pattern indicates a DL-PRS resource or a DL-PRS resource set, as described above, it depends on the muting option set by RRC in the terminal 20. The same applies to the following examples. When both muting options 1 and 2 are set, the S in the MAC CE i may be applied to the muting pattern of muting option 1, may be applied to the muting pattern of muting option 2, or may be applied to the muting patterns of both muting options 1 and 2.

[0049] Fig. 9(a) shows a specific example when the muting pattern is a 4-bit bitmap. The upper part shows the S in the MAC CE i in the order of i, which is an example of applying S i from the leftmost bit (the most significant bit) of the muting pattern. The lower part shows the S in the MAC CE i in the order of i, which is an example of applying S i from the rightmost bit (the least significant bit) of the muting pattern.

[0050] <Example 1-2> Next, Example 1-2 will be described. In Example 1-2, Z (Z>1) bits in the muting pattern correspond to 1 bit in the MAC CE. That is, 1 bit in the MAC CE corresponds to a group of bits in the muting pattern.

[0051] An example of the correspondence between Z bits in the muting pattern and 1 bit in the MAC CE is shown in Fig. 10.

[0052] Fig. 10(a) shows a specific example when the muting pattern is a 4-bit bitmap and Z = 2. The upper part shows the S in the MAC CE i in the order of i, which is an example of applying S i from the most significant Z bits (the most significant bits) of the muting pattern by Z bits each.is an example of application. The lower side shows S in the MAC CE i in the order of i, from the lowest Z bit (least significant bit) of the muting pattern to Z bits one by one for S i is an example of application.

[0053] Regarding the application of S here i it may be the same as or different from that in Example 1-1. When it is the same as Example 1-1, between the value of each bit of the Z bit in the muting pattern and the value of the corresponding S i bit, operations such as logical AND, logical OR, exclusive OR, and replacement of the bit value of S in the MAC CE regardless of the original value are performed, and the muting pattern after the operation becomes the muting pattern activated / deactivated by the MAC CE. i

[0054] Regarding the value of Z in Example 1-2, for example, it is defined in a specification or the like and is held in advance by the terminal 20 and the base station 10. Alternatively, the value of Z may be set (or updated or instructed) from the base station 10 to the terminal 20 by RRC signaling (or MAC CE or DCI).

[0055] Also, in each of the base station 10 and the terminal 20 (base station 10 / terminal 20), the value of Z may be determined based on the size (bit length) of the muting pattern (bitmap). Hereinafter, Z determination method 1 and Z determination method 2 will be described as variations of the Z determination method. In the following examples, each of the base station 10 and the terminal 20 determines Z, but it is also possible that the base station 10 determines Z and notifies the determined Z to the terminal 20.

[0056] <Z determination method 1> In Z determination method 1, the base station 10 / terminal 20 determines Z for the muting pattern to which the MAC CE is applicable by referring to a table showing the correspondence between the bit length of the muting pattern and Z. This table is defined in a specification or the like and may be pre-held by the base station 10 / terminal 20 or may be notified from the base station 10 to the terminal 20.

[0057] An example of the table is shown in FIG. 11(a). In the case of FIG. 11(a), for example, if the bit length of the muting pattern is 4, Z = 1, and if the bit length of the muting pattern is 16, Z = 2, etc. are shown.

[0058] As shown in FIG. 11(b), when the bit length of the muting pattern to which the MAC CE is applicable is 4, since Z = 1, similar to the case shown in FIG. 9(a) of Example 1-1, 1 bit of S i is applied to each bit of the muting pattern.

[0059] FIG. 12 shows an example when the bit length of the muting pattern is 16. In this case, from the table, since Z = 2, similar to the case shown in FIG. 10, 1 bit of S i is applied to every 2 bits of the muting pattern.

[0060] <Z determination method 2> In Z determination method 2, the base station 10 / terminal 20 determines Z for the muting pattern to which the MAC CE is applicable by an expression based on the bit length of the muting pattern and the bit length of S i in the MAC CE.

[0061] A specific example of the expression is shown in FIG. 13(a). In FIG. 13(a), Z is the output value of the ceiling function of the value obtained by dividing the bit length L b of the muting pattern by the bit length L i of S in the MAC CE. That is, Z is the value of L s divided by L b divided by L sIt is an integer obtained by rounding up the fractional part of the value divided by i . Note that "the bit length of S in the MAC CE" may be expressed as "the bit length of the MAC CE".

[0062] As shown in FIG. 13(b), when L b = 4 and L s = 4, since Z = 1, similar to the case shown in FIG. 9(a) of Example 1-1, 1 bit of S i is applied to each bit of the muting pattern.

[0063] FIG. 14 shows an example when L b = 16 and L s = 4. In this case, since Z = 4, 1 bit of S i is applied to every 4 bits of the muting pattern.

[0064] <Example 1-3> Example 1-3 assumes that it is applied to Example 1-2 (group-based S i application), but Example 1-3 may also be applied to Example 1-1 (Z = 1). When Example 1-3 is applied to Example 1-1 (Z = 1), the "group" in the following description may be the entire bitmap of the muting pattern.

[0065] In Example 1-3, it is assumed that the bits included in each group (e.g., "the first bit and the second bit", "the third bit and the fourth bit", etc. when Z = 2) of the muting pattern set by RRC from the base station 10 to the terminal 20 are specific bits.

[0066] That is, the base station 10 sets, in S101 of FIG. 3, the muting pattern in which the values of the bits included in each group of the muting pattern are the values of specific bits, to the terminal 20. The terminal 20 assumes that such a muting pattern is set. Hereinafter, as specific examples, Examples 1-3-A to 1-3-C will be described.

[0067] <Example 1-3-A> In Embodiment 1-3-A, the base station 10 sets the muting pattern in which all the values of the bits included in each group of the muting pattern are 1 or 0 for the terminal 20.

[0068] Fig. 15(a) shows an example of the muting pattern in Embodiment 1-3-A. This example is a case where the bit length of the muting pattern is 16, the bit length of the MAC CE is 4, and Z = 4.

[0069] As shown in Fig. 15(a), the value of each Z bit in the muting pattern is only 0 or only 1. In the example of Fig. 15(a), the original bit values in the muting pattern are converted into corresponding S i values in units of Z bits. That is, here, when S i = 1, it means that the transmission of the DL-PRS is activated, and when S i = 0, it means that the transmission of the DL-PRS is deactivated (the muting is activated).

[0070] <Embodiment 1-3-B> In Embodiment 1-3-B, it is assumed that the values of the bits included in each group of the muting pattern set by RRC from the base station 10 to the terminal 20 can be a mixture of 1 and 0.

[0071] That is, the base station 10 sets the muting pattern in which the values of the bits included in each group of the muting pattern can be a mixture of 1 and 0 for the terminal 20.

[0072] Fig. 15(b) shows an example of the muting pattern in Embodiment 1-3-B. This example is also a case where the bit length of the muting pattern is 16, the bit length of the MAC CE is 4, and Z = 4.

[0073] As shown in FIG. 15(b), 0s and 1s are mixed in each Z-bit in the muting pattern. In the example of FIG. 15(b), the value of the original bit in the muting pattern is taken as the exclusive logical sum of each Z-bit and the value of S corresponding to each bit of the Z-bit. i is defined as taking the exclusive logical sum with the value of S.

[0074] <Example 1-3-C> In Example 1-3-C, according to the muting option set for terminal 20 by RRC, the operation of Example 1-3-A or the operation of Example 1-3-B is assumed.

[0075] That is, the base station 10 determines which operation of the operation of Example 1-3-A and the operation of Example 1-3-B to perform according to the muting option set for terminal 20 by RRC. Terminal 20 also determines which operation of the operation of Example 1-3-A and the operation of Example 1-3-B to perform according to the muting option set for terminal 20 by RRC.

[0076] For example, when muting option 1 is set for terminal 20 by RRC, the operation of Example 1-3-B is performed; when muting option 2 is set for terminal 20 by RRC, the operation of Example 1-3-A is performed; when both muting options 1 and 2 are set for terminal 20 by RRC, the operation of Example 1-3-A is performed.

[0077] The reverse operation may also be used. That is, when muting option 1 is set for terminal 20 by RRC, the operation of Example 1-3-A is performed; when muting option 2 is set for terminal 20 by RRC, the operation of Example 1-3-B is performed; when both muting options 1 and 2 are set for terminal 20 by RRC, the operation of Example 1-3-B may be performed.

[0078] <Other Examples in Example 1> (Example 1) The terminal 20 may also apply activation / deactivation starting from the slot next to the slot in which the command for activation / deactivation of the MAC CE is received.

[0079] (Example 2) Alternatively, the terminal 20 may apply activation / deactivation starting from the slot that is n slots after the slot in which the command for activation / deactivation of the MAC CE is received. Here, the case where n = 1 corresponds to "starting from the next slot" in Example 1.

[0080] (Example 3) Alternatively, the terminal 20 may apply activation / deactivation starting from the symbol that is m symbols after the end of the symbol in which the command for activation / deactivation of the MAC CE is received.

[0081] The values of n and m in Example 2 and Example 3 may be predefined in a specification document or the like, or may be set from the base station 10 to the terminal 20 by RRC or the like.

[0082] (Example 4) When the RRC parameter (DL-PRS-MutingBitRepetitionFactor) that determines the number of repetitions of the muting pattern is set in the terminal 20, it may be assumed that the value of DL-PRS-MutingBitRepetitionFactor is updated by the MAC CE. Note that in R-16 (Non-Patent Document 1), when DL-PRS-MutingBitRepetitionFactor = r, the terminal 20 determines that 1 bit of the muting pattern corresponds to r consecutive DL-PRS resource sets.

[0083] For example, the base station 10 may transmit to the MAC CE that performs activation / deactivation of the muting pattern, including the value of DL-PRS-MutingBitRepetitionFactor. The terminal 20 that receives the MAC CE applies the value of DL-PRS-MutingBitRepetitionFactor in the MAC CE.

[0084] <Example 1-4> In S101 of FIG. 3, the base station 10 may set M (M>1) muting patterns in RRC. When M (M>1) muting patterns are set, in S102, the base station 10 may activate, by means of the MAC CE, one or more of the M muting patterns (referred to as muting pattern A). The terminal 20 uses the activated muting pattern A.

[0085] Also, afterwards, the base station 10 may deactivate muting pattern A and activate muting pattern B by means of the MAC CE. Afterwards, the terminal 20 uses the activated muting pattern B.

[0086] According to Example 1, since the activation / deactivation of the DL-PRS resources can be controlled in fine time units, it is possible to use the resources efficiently. Also, positioning with low latency becomes possible.

[0087] (Example 2) Next, Example 2 will be described. Example 2 may be implemented in combination with Example 1, or may be implemented independently of Example 1.

[0088] In Example 2, the DL-PRS resource set set for the terminal 20 in RRC, or the DL-PRS resources in the DL-PRS resource set, are activated / deactivated by means of the MAC CE.

[0089] For example, in S102 of FIG. 3, the base station 10 transmits a MAC CE for activating / deactivating a DL-PRS resource set / DL-PRS resource to the terminal 20.

[0090] The terminal 20 that receives the MAC CE activates / deactivates the DL-PRS resource set / DL-PRS resource specified by the MAC CE.

[0091] Here, by activating the DL-PRS resource set, the terminal 20 can receive the DL-PRS using the DL-PRS resources specified by the DL-PRS resource set. By deactivating the DL-PRS resource set, the terminal 20 cannot (does not receive) the DL-PRS using the DL-PRS resources specified by the DL-PRS resource set.

[0092] Also, by activating the DL-PRS resources in a certain DL-PRS resource set, the terminal 20 can receive the DL-PRS using the activated DL-PRS resources in the DL-PRS resource set. By deactivating the DL-PRS resources in a certain DL-PRS resource set, the terminal 20 does not receive the DL-PRS using the deactivated DL-PRS resources in the DL-PRS resource set.

[0093] Note that when combining Example 1 and Example 2, for example, in the muting pattern for the DL-PRS resource set activated by the MAC CE of Example 2, it may be assumed that the activation / deactivation of the muting pattern by the MAC CE of Example 1 is effective.

[0094] Also, in the case of the terminal 20 in the muting pattern for the DL-PRS resource set deactivated by the MAC CE of the second embodiment, it may be assumed that the activation / deactivation of the muting pattern by the MAC CE of the first embodiment is not performed.

[0095] Also, when combining the first embodiment and the second embodiment, the MAC CE in the first embodiment and the MAC CE in the second embodiment may be different MAC CEs or the same MAC CE.

[0096] FIG. 16 shows an example of the MAC CE in the case of performing activation / deactivation in units of the DL-PRS resource set. FIG. 16(a) is an example when the number of DL-PRS resource sets set in the terminal 20 by the RRC is one. As shown in FIG. 16(a), the information of "Resource set ID" corresponding to the DL-PRS resource set is stored in the MAC CE. The information of "Resource set ID" is, for example, the ID of the DL-PRS resource set and a value indicating activation / deactivation.

[0097] The position of the octet of "Resource set ID" (OCT2 in FIG. 16(a)) may be information for identifying the DL-PRS resource set, and in that case, the value of "Resource set ID" may be a value indicating activation / deactivation.

[0098] FIG. 16(b) is an example when the number of DL-PRS resource sets set in the terminal 20 by the RRC is two or more.

[0099] FIG. 17 shows an example of a MAC CE in the case of performing activate / deactivate in DL-PRS resource units. As shown in FIG. 17, the "Resource set ID" and "Resource ID" specify the DL-PRS resources in a specific DL-PRS resource set, and activate / deactivate for the DL-PRS resources is indicated.

[0100] The information of "Resource ID" is, for example, one or more IDs of DL-PRS resources and a value indicating activate / deactivate. It is also possible to identify the DL-PRS resources by the bit positions in the field where "Resource ID" is stored, and the value of the bit at that position indicates activate / deactivate. In the example of FIG. 17, the bit length of the field where "Resource ID" is stored is 7 bits, but this is just an example. The bit length of the field where "Resource ID" is stored may be greater than or less than 7 bits.

[0101] Note that it may be assumed that the terminal 20 has one or more DL-PRS resource sets or one or more DL-PRS resources activated by the MAC CE, and the DL-PRS resource set / DL-PRS resource triggered by the DCI is indicated therefrom.

[0102] That is, after the base station 10 activates one or more DL-PRS resource sets or one or more DL-PRS resources for the terminal 20 by the MAC CE, the base station 10 may indicate the DL-PRS resource set / DL-PRS resource actually used by the terminal 20 by the DCI. The DL-PRS related to this operation may be called Aperiodic DL-PRS.

[0103] According to Example 2, since the activation / deactivation of DL-PRS resources can be controlled in fine time units, it is possible to use resources efficiently. Also, positioning with low latency becomes possible.

[0104] (Example 3) Next, Example 3 will be described. Example 3 may be applied to Example 1, may be applied to Example 2, or may be applied to both Example 1 and Example 2. Hereinafter, the muting pattern that is the target of activation / deactivation in Example 1 and the DL-PRS resource set / DL-PRS resource that is the target of activation / deactivation in Example 2 are collectively referred to as "target".

[0105] Also in Example 3, similar to Examples 1 and 2, it is assumed that a DL-PRS resource set / DL-PRS resource with a resource type of Semi-persistent is set in the RRC in the terminal 20.

[0106] In Example 3, it is assumed that when the target is activated by the MAC CE in the terminal 20 (and the base station 10), the target is deactivated by a trigger other than the MAC CE.

[0107] An operation example of Example 3 will be described with reference to FIG. 18. As a premise of FIG. 18, in the terminal 20, a DL-PRS resource set / DL-PRS resource with a resource type of Semi-persistent is set in the RRC from the base station 10, and a timer (deactivation timer) is set by the RRC. The value of the deactivation timer may be in time units (e.g., T [ms]) or in slot units (e.g., K [slot]).

[0108] In S301 of FIG. 18, at the timing when the target is activated by the MAC CE, start a timer. Note that the timing for starting the timer may be when the reception of DL-PRS starts. The terminal 20 performs an operation related to the target (e.g., DL-PRS reception on the activated DL-PRS resource) while the timer is running. When the terminal 20 detects that the timer has expired (e.g., T [ms] has elapsed), it deactivates the activated target. For example, it stops the DL-PRS reception on the DL-PRS resource.

[0109] The base station 10 may also perform a similar operation. For example, the base station 10 starts a timer at the timing when it transmits the MAC CE of S301. The base station 10 performs an operation related to the target (e.g., DL-PRS transmission on the activated DL-PRS resource) while the timer is running. When the base station 10 detects that the timer has expired (e.g., T [ms] has elapsed), it deactivates the activated target. For example, it stops the DL-PRS transmission on the DL-PRS resource and releases the resource.

[0110] It may be assumed that the terminal 20 (and the base station 10) activated by the MAC CE will not be deactivated by the MAC CE, or it may be assumed that the target is deactivated by the timer only when the target is not deactivated by the MAC CE within T [ms].

[0111] Note that in the above operation, after activation by the MAC CE, deactivation is performed by the timer, but after deactivation by the MAC CE, activation may be performed by the timer. Specifically, it is as follows.

[0112] In S301 of FIG. 18, start a timer at the timing when the target is deactivated by the MAC CE. While the timer is running, the terminal 20 does not perform operations related to the target (e.g., DL-PRS reception on the activated DL-PRS resource). When the terminal 20 detects that the timer has expired (e.g., after T [ms] has elapsed), it activates the deactivated target. For example, it starts DL-PRS reception on the DL-PRS resource.

[0113] The base station 10 may also perform a similar operation. For example, the base station 10 starts a timer at the timing when it transmits the MAC CE of S301. While the timer is running, the base station 10 does not perform operations related to the target (e.g., DL-PRS transmission on the activated DL-PRS resource). When the base station 10 detects that the timer has expired (e.g., after T [ms] has elapsed), it activates the deactivated target. For example, it starts DL-PRS transmission on the DL-PRS resource.

[0114] It may be assumed that the terminal 20 (and the base station 10) deactivated by the MAC CE will not be activated by the MAC CE for the target, or it may be assumed that the target is activated by the timer only when the target is not activated by the MAC CE within T [ms].

[0115] In the third embodiment, since control by the timer is possible, signaling overhead can be reduced.

[0116] (Fourth Embodiment) Next, the fourth embodiment will be described. The fourth embodiment may be applied to the first embodiment, may be applied to the second embodiment, may be applied to the third embodiment, or may be applied to any combination of two or more of the first, second, and third embodiments.

[0117] In Embodiment 4, the terminal 20 reports to the base station 10 the number of Semi-persistent DL-PRS resource sets / DL-PRS resources that can be configured, the number that can be simultaneously activated / deactivated, etc. according to the UE capability (capability information).

[0118] A sequence example is shown in FIG. 19. In S401, the terminal 20 transmits the UE capability of Embodiment 4 to the base station 10. Based on the UE capability received from the terminal 20, the base station 10 configures the DL-PRS resource set / DL-PRS resources by RRC (S402) and performs activation / deactivation by MAC CE (S403).

[0119] For example, the base station 10 performs RRC configuration or activation / deactivation by MAC CE for a number of targets equal to or less than the capability (e.g., the number of Semi-persistent DL-PRS resource sets / DL-PRS resources that can be configured) notified by the UE capability from the terminal 20.

[0120] Specific examples of the information (reported content) included in the UE capability include, for example, the following Report Content Example 1 to Report Content Example 4. Any plurality or all of Report Content Example 1 to Report Content Example 4 may be combined.

[0121] Report Content Example 1) The number of Semi-persistent DL-PRS resource sets that can be configured by RRC. The reported value is per UE (per terminal), per BWP (per BWP), per slot (per slot), etc.

[0122] Report Content Example 2) The number of Semi-persistent DL-PRS resources that can be configured by RRC. The reported value is per UE, per BWP, per slot, per semi-persistent DL-PRS resource set, etc.

[0123] Report content example 3) Number of Semi-persistent DL-PRS resource sets that can be activated / deactivated at once with MAC CE. The reported value is per UE, per BWP, per slot, etc. The terminal 20 may assume the activation / deactivation bit size of the MAC CE (e.g., L in Example 1-2) according to the reported value. s ) may be assumed. Also, for example, the terminal 20 may assume the field size of the resource set ID / resource ID in Example 2 from the reported value.

[0124] Report content example 4) Number of Semi-persistent DL-PRS resources that can be activated / deactivated at once with MAC-CE. The reported value is per UE, per BWP, per slot, per semi-persistent DL-PRS resource set, etc. The terminal 20 may assume the activation / deactivation bit size of the MAC-CE (e.g., L in Example 1-2) according to the reported value. s ) may be assumed. Also, for example, the terminal 20 may assume the field size of the resource set ID / resource ID in Example 2 from the reported value.

[0125] In Example 4, since the capability information of the terminal 20 is notified, the base station 10 can execute the RRC setting and the MAC CE instruction according to the capability of the terminal 20.

[0126] (Others) Note that "Semi-persistent DL-PRS" in this specification may be rephrased as "MAC triggered DL-PRS" or "MAC-CE triggered DL-PRS", etc.

[0127] Also, the muting pattern "muting pattern" in this specification may be rephrased as "deactivated pattern", "activated pattern", etc.

[0128] (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 functions for implementing the above-described Examples 1 to 4. However, the base station 10 and the terminal 20 may each be provided with only the functions of any one of Examples 1 to 4.

[0129] <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 merely an example. As long as the operations according to the embodiments of the present invention can be executed, the functional divisions and the names of the functional units may be any. The transmission unit 110 and the reception unit 120 may be called a communication unit.

[0130] The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal. The reception unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining, for example, information of 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 signals, DL data, etc. to the terminal 20. Further, the transmission unit 110 transmits the setting information, DL-PRS, etc. described in Examples 1 to 4.

[0131] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device and reads it out from the storage device as necessary. The control unit 140 performs, for example, resource allocation, control of the entire base station 10, etc. Note that a functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the reception unit 120. Also, the transmission unit 110 and the reception unit 120 may be called a transmitter and a receiver, respectively.

[0132] <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 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 21 is merely an example. As long as the operations according to the embodiments of the present invention can be executed, the functional classification and the names of the functional units may be anything. The transmission unit 210 and the reception unit 220 may be called a communication unit.

[0133] The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The reception unit 220 wirelessly receives various signals and acquires signals of a higher layer from the received physical layer signals. Further, the reception unit 220 receives the setting information, DL-PRS, etc. described in Examples 1 to 4.

[0134] The setting unit 230 stores various setting information received from the base station 10 by the reception unit 220 in a storage device and reads it out from the storage device as necessary. Further, the setting unit 230 also stores preset setting information. The control unit 240 controls the entire terminal 20. Note that a functional unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the reception unit 220. Also, the transmission unit 210 and the reception unit 220 may be called a transmitter and a receiver, respectively.

[0135] The terminal 20 and the base station 10 are configured as, for example, the terminal and the base station described in each of the following items. (Item 1) A reception unit that receives setting information of a positioning reference signal from a base station and receives a MAC CE that activates or deactivates a muting pattern in the setting information from the base station, A control unit that determines whether to receive a positioning reference signal based on the muting pattern to which the activation or the deactivation is applied A terminal comprising. (Item 2) One bit indicating activation or deactivation in the MAC CE corresponds to one bit or a plurality of bits in the muting pattern The terminal according to claim 1 (Claim 3) The receiving unit receives from the base station a MAC CE that activates or deactivates a resource of a positioning reference signal The terminal according to claim 1 or 2 (Claim 4) When the time of the timer has elapsed since the activation or deactivation by the MAC CE was applied to the target, the control unit determines that the target has been deactivated or activated The terminal according to any one of claims 1 to 3 (Claim 5) A transmitting unit that transmits to the base station capability information regarding a positioning reference signal to which activation or deactivation by a MAC CE is applied The terminal according to any one of claims 1 to 4, comprising the same (Claim 6) A transmitting unit that transmits setting information of a positioning reference signal to a terminal and transmits to the terminal a MAC CE that activates or deactivates a muting pattern in the setting information A control unit that determines whether to transmit a positioning reference signal based on the muting pattern to which the activation or the deactivation is applied A base station comprising the same

[0136] According to any of the above-described configurations, a technique is provided that enables efficient use of resources of a reference signal used for positioning

[0137] (Hardware Configuration) The block diagrams (FIGS. 16 and 17) used in the description of the above embodiments show blocks in terms of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (for example, using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0138] Functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication (communicating), forwarding, configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), etc. For example, a functional block (component) that functions as transmission is called a transmission unit or a transmitter. In any case, as described above, the realization method is not particularly limited.

[0139] For example, the base station 10, the terminal 20, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of 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 an embodiment of the present disclosure. The above base station 10 and terminal 20 may physically be 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, etc.

[0140] In the following description, the term "device" can be read as a circuit, device, unit, etc. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0141] Each function in the base station 10 and the terminal 20 is realized by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs operations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the storage device 1002 and the auxiliary storage device 1003.

[0142] The processor 1001 controls the entire computer by operating, for example, an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, the above-described control units 140, 240, etc. may be realized by the processor 1001.

[0143] Also, the processor 1001 reads a program (program code), software module, data, etc. 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 for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 140 of the base station 10 shown in FIG. 20 may be stored in the storage device 1002 and realized by a control program operating on the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in FIG. 21 may be stored in the storage device 1002 and realized by a control program operating on the processor 1001. Although it has been described that the above various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

[0144] The storage device 1002 is a computer-readable recording medium and may be constituted by at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may be referred to as a register, cache, main memory (main storage device), etc. The storage device 1002 can store a program (program code), software module, etc. executable for implementing the communication method according to an embodiment of the present disclosure.

[0145] The auxiliary storage device 1003 is a computer-readable recording medium, which may be constituted by at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. The auxiliary storage device 1003 may also be called an auxiliary storage. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate media including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0146] The communication device 1004 is hardware (a transmission / reception device) for performing communication 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, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission line interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated into a transmission unit and a reception unit.

[0147] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) for receiving an external input. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) for performing an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0148] Also, 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 using a single bus, or may be configured using different buses for each device.

[0149] Also, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0150] (Supplement of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, corrections, alternatives, substitutions, etc. Specific numerical examples have been used for explanation to facilitate understanding of the invention, but unless otherwise specified, those numerical values are merely examples and any appropriate values may be used. The classification of items in the above description is not essential to the present invention, and matters described in two or more items may be used in combination as needed, or matters described in one item may be applied to matters described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of multiple functional units may be physically performed by one component, or conversely, the operation of one functional unit may be physically performed by multiple components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. For the sake of convenience in explaining the processing, the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software that operates by the processor included in the base station 10 according to the embodiment of the present invention and the software that operates by the processor included in the terminal 20 according to the embodiment of the present invention may each be stored in a random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk drive (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.

[0151] In addition, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and other methods may be used. For example, the notification of information may be implemented by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, notification information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Also, the RRC signaling may be referred to as an RRC message, and for example, it may be an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, etc.

[0152] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication 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)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other suitable systems, and next-generation systems extended based thereon. Also, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G, etc.) may be applied.

[0153] The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this specification may be rearranged as long as there is no contradiction. For example, for the methods described in this disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0154] The specific operations assumed to be performed by the base station 10 in this specification may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, but not limited to, the MME or S-GW, etc.). Although the case where there is one other network node other than the base station 10 is exemplified above, the other network node may be a combination of a plurality of other network nodes (for example, the MME and the S-GW).

[0155] The information or signals, etc. described in this disclosure can be output from an upper layer (or a lower layer) to a lower layer (or an upper layer). They may also be input and output via a plurality of network nodes.

[0156] The input and output information, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. The input and output information, etc. can be overwritten, updated, or appended. The output information, etc. may be deleted. The input information, etc. may be transmitted to other devices.

[0157] The determination in this disclosure may be made by a value represented by 1 bit (0 or 1), or by a Boolean value (true or false), or by a numerical comparison (for example, comparison with a predetermined value).

[0158] Software should be broadly construed to mean, whether called software, firmware, middleware, microcode, a hardware description language, or by any other name, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0159] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cables, fiber optic cables, twisted pairs, digital subscriber line (DSL), etc.) and wireless technologies (such as infrared, microwaves, etc.), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0160] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0161] Note that terms described in this disclosure and terms necessary for understanding this 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, a signal may be a message. Also, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0162] The terms "system" and "network" used in this disclosure are used interchangeably.

[0163] Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or other corresponding information. For example, radio resources may be indicated by indexes.

[0164] The names used for the above-described parameters are not limiting names in any respect. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in this disclosure. Since various channels (e.g., PUSCH, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0165] In this disclosure, terms such as "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", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0166] A base station can accommodate one or more (e.g., three) cells. When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0167] In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" can be used interchangeably.

[0168] A mobile station may also be called by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0169] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves without a driver (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or non-humanoid). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. 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.

[0170] Also, the base station in the present disclosure may be replaced by a terminal. For example, for a configuration in which communication between the base station and the terminal is replaced by communication between a plurality of terminals 20 (which may be referred to as, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured to be functions of the terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to communication between terminals (for example, "side"). For example, the uplink channel, downlink channel, etc. may be replaced with a side channel.

[0171] Similarly, the terminal in the present disclosure may be replaced by a base station. In this case, the functions of the above-described terminal may be configured to be functions of the base station.

[0172] The terms "determining" and "deciding" as used in this disclosure may encompass a wide variety of actions. "Determining" and "deciding" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or another data structure), ascertaining, and considering something as having been "determined" or "decided". Also, "determining" and "deciding" may include considering something as having been "determined" or "decided" after receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in memory), etc. Further, "determining" and "deciding" may include considering something as having been "determined" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. That is, "determining" and "deciding" may include considering that some action has been "determined" or "decided". Also, "determining (deciding)" may be read as "assuming", "expecting", "considering", etc.

[0173] The terms "connected" or "coupled", or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed". As used in this disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, and also, by way of some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) regions.

[0174] The reference signal can also be abbreviated as RS (Reference Signal) and may be called a Pilot depending on the applicable standard.

[0175] As used in this disclosure, the description "based on" does not mean "based only on" unless otherwise specified. In other words, the description "based on" means both "based only on" and "based at least on".

[0176] Any reference to an element using designations such as "first", "second", etc. used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements can be employed, or that the first element must precede the second element in any form.

[0177] In the configuration of each of the above devices, the "means" can be replaced with "section", "circuit", "device", etc.

[0178] In the present disclosure, when terms such as "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0179] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be referred to as a subframe. A subframe may further be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[0180] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0181] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on numerology.

[0182] The slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. The mini-slot may be composed of a smaller number of symbols than the slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot may be called PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the mini-slot may be called PDSCH (or PUSCH) mapping type B.

[0183] The radio frame, sub-frame, slot, mini-slot, and symbol all represent time units when transmitting signals. Different names corresponding to each of them may also be used.

[0184] For example, one sub-frame may be called a Transmission Time Interval (TTI), or a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, a mini-slot, etc. instead of a sub-frame.

[0185] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used in each terminal 20) to each terminal 20 in TTI units. Note that the definition of the TTI is not limited to this.

[0186] The TTI may be a transmission time unit such as a channel-coded data packet (transport block), code block, codeword, etc., or may be a processing unit such as scheduling, link adaptation, etc. When the TTI is given, the time interval (e.g., the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0187] Note that when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0188] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than the normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-slot, slot, etc.

[0189] Note that the long TTI (e.g., normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) may be read as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0190] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in the RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in the RB may be determined based on the numerology.

[0191] Also, the time domain of the RB may include one or more symbols, and may have the length of 1 slot, 1 mini-slot, 1 sub-frame, or 1 TTI. 1 TTI, 1 sub-frame, etc. may each be composed of one or more resource blocks.

[0192] Note that one or more RBs may be referred to as physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc.

[0193] Also, the resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0194] A bandwidth part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within the BWP.

[0195] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). For a UE, one or more BWPs may be set within one carrier.

[0196] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".

[0197] The structures such as the above-described radio frames, sub-frames, slots, mini-slots, and symbols are merely examples. For example, the number of sub-frames included in a radio frame, the number of slots per sub-frame or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, cyclic prefix (CP) length, etc. within a TTI can be changed in various ways.

[0198] In the present disclosure, for example, when an article is added by translation like a, an, and the in English, the present disclosure may include that the noun following these articles is in the plural form.

[0199] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". Note that the term may also mean "A and B are each different from C". Terms such as "separate", "coupled", etc. may also be interpreted in the same way as "different".

[0200] In the present disclosure, each aspect / embodiment described may be used alone, in combination, or switched and used during execution. Also, the notification of predetermined information (for example, the notification of "being X") is not limited to being explicitly performed, and may be performed implicitly (for example, without performing the notification of the predetermined information).

[0201] Note that in the present disclosure, an SS block or CSI-RS is an example of a synchronization signal or a reference signal.

[0202] As described in detail above, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented in modified and changed forms without departing from the spirit and scope of the present disclosure defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning for the present disclosure.

Explanation of Signs

[0203] 10 Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 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

1. A receiving unit that receives setting information of a positioning reference signal from a base station and receives a MAC CE from the base station that activates or deactivates a muting pattern in the setting information; A control unit that determines whether to receive a positioning reference signal based on the muting pattern to which the activation or deactivation is applied, and a terminal comprising: The control unit determines that the target is deactivated or activated when the time of the timer has elapsed since the time when activation or deactivation is applied to the target by the MAC CE. Terminal.

2. The receiving unit receives a MAC CE from the base station that activates or deactivates a resource of a positioning reference signal. The terminal according to claim 1.

3. A transmitting unit that transmits capability information regarding a positioning reference signal to which activation or deactivation by a MAC CE is applied to the base station. The terminal according to claim 1 or 2, comprising:

4. A transmitting unit that transmits setting information of a positioning reference signal to a terminal and transmits a MAC CE that activates or deactivates a muting pattern in the setting information to the terminal; A control unit that determines whether to transmit a positioning reference signal based on the muting pattern to which the activation or deactivation is applied, and a base station comprising: The control unit determines that the target is deactivated or activated when the time of the timer has elapsed since the time when activation or deactivation is applied to the target by the MAC CE. Base station.

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