WO2021117245A1

WO2021117245A1 - Communication device

Info

Publication number: WO2021117245A1
Application number: PCT/JP2019/049051
Authority: WO
Inventors: 大輔平塚; 邦彦手島; アニールウメシュ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-17
Also published as: CN114788332A

Abstract

A communication device constituting a first base station installed in a front hall is provided with a control unit that determines the parameter used for determining a data reception timing in an intermediate device installed in the front hall, and a transmission unit that transmits the parameter to the intermediate device.

Description

Communication device

The present invention relates to a communication device corresponding to a front hall interface.

The O-RAN Alliance was established with the aim of promoting the openness and intelligentization of wireless access networks (RAN) in the 5G era, and today many businesses / vendors are joining and discussing.

Multiple architectures are being discussed at O-RAN, one of which is the open fronthaul (FH) interface that enables the interconnection of baseband processing and radio between different vendors. ..

Specifically, in O-RAN, O-RAN Distributed Unit (O-DU) and O-RAN Radio Unit (O-RU) are function groups that perform layer 2 functions, baseband signal processing, and radio signal processing. It is defined and discussed as an interface between O-DU and O-RU.

O-DU is a logical node that mainly hosts the wireless link control layer (RLC), medium access control layer (MAC), and PHY-High layer based on the lower layer functional. The O-RU is a logical node that mainly hosts the PHY-Low layer and RF processing based on the low-level functional division.

In O-RAN, the function sharing points of O-DU / O-RU are placed in the physical (PHY) layer, so strict timing accuracy is required. For this reason, FH delay management is performed, and a transmission window and a reception window are used as the method (Non-Patent Document 1).

In addition, the current O-RAN FH specifications are premised on a stationing method in which one cell is composed of one O-RU. On the other hand, there is also a stationing method in which one cell is composed of multiple O-RUs, and expansion of specifications for that is being considered. Specifically, a configuration using a device for bundling O-RUs (FHM: Fronthaul Multiplexing) (FHM configuration) and a configuration for continuously connecting O-RUs (cascade configuration) are being studied. Collectively, these are called Shared Cell. In the following description, FHM and O-RU (cascade O-RU) intervening in the middle are collectively referred to as an intermediate device (tentative name).

By the way, in the shared cell configuration as described above, the FH delay of O-DU to intermediate device, intermediate device to intermediate device, intermediate device to O-RU, etc. changes depending on the installation position of the intermediate device.

However, there is no mechanism for determining whether or not the installation position of the intermediate device is appropriate, and it is difficult to optimize the FH including the intermediate device.

Therefore, the present invention has been made in view of such a situation, and it is determined whether or not the installation position of the intermediate device is appropriate even when the Shared Cell configuration in the front hall (FH) interface is applied. It is an object of the present invention to provide a communication device capable of performing the above.

One aspect of the present disclosure is a communication device constituting a first base station provided on the front hall, and is a control for determining parameters used for determining a data reception timing in the intermediate device provided on the front hall. A unit and a transmission unit that transmits the parameters to the intermediate device are provided.

One aspect of the present disclosure is a communication device that constitutes an intermediate device provided on the front hall, and is provided on the front hall and a control unit that executes control for determining data reception timing in the intermediate device. It includes a receiving unit that receives parameters used for determining the reception timing from the first base station.

FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the embodiment. FIG. 2 is a diagram showing an example of an internal configuration of the gNB 100 that employs the front hole (FH) interface according to the embodiment. FIG. 3A is a diagram showing a configuration example (without an intermediate device) of the front hole according to the embodiment. FIG. 3B is a diagram showing a configuration example of a front hole according to an embodiment (with an intermediate device and an FHM configuration). FIG. 3C is a diagram showing a configuration example of a front hole according to an embodiment (with an intermediate device and a cascade configuration). FIG. 4 is a diagram showing various signals in the front hole (FH) between O-DU110 and O-RU120 according to the embodiment. FIG. 5 is a functional block configuration diagram of the O-DU 110 according to the embodiment. FIG. 6 is a functional block configuration diagram of the intermediate device 130 according to the embodiment. FIG. 7 is a diagram showing an example of delay management of a front hole in UL according to the embodiment. FIG. 8 is a diagram showing an example of delay management of the front hole in the DL according to the embodiment. FIG. 9 is a diagram showing an example of a counter according to the embodiment. FIG. 10 is a diagram showing a wireless communication method according to the embodiment. FIG. 11 is a diagram showing an example of delay management of the front hole in UL according to the first modification. FIG. 12 is a diagram showing an example of delay management of the front hole in the DL according to the change example 1. FIG. 13 is a diagram showing an example of the hardware configuration of the O-DU 110 and the intermediate device 130.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

[Embodiment]
(1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the embodiment. In the embodiment, the wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and is a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20, and a terminal 200 (hereinafter, User Equipment 200, hereinafter, UE200). )including.

NG-RAN20 includes a radio base station 100 (hereinafter, gNB100). The specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.

The NG-RAN20 actually contains multiple NG-RAN Nodes, specifically gNB (or ng-eNB), and is a core network according to 4G (Evolved Packet Core, not shown) or a core according to 5G. Connected to a network (5GC, not shown). In addition, NG-RAN20 and 5GC may be simply expressed as a network.

GNB100 is a wireless base station that complies with 5G, and executes wireless communication according to UE200 and 5G. The gNB100 and UE200 include Massive MIMO, which generates a beam with higher directivity by controlling radio signals transmitted from multiple antenna elements, and carrier aggregation (CA), which uses multiple component carriers (CC) in a bundle. It can also support dual connectivity (DC), which communicates simultaneously between the UE and multiple NG-RAN Nodes.

Also, in the embodiment, the gNB100 adopts the front hole (FH) interface specified by O-RAN.

(2) Front Hall Configuration Figure 2 shows an example of the internal configuration of the gNB100 that employs a front hole (FH) interface. As shown in FIG. 2, the gNB100 includes an O-DU110 (O-RAN Distributed Unit) and an O-RU120 (O-RAN Radio Unit). O-DU110 and O-RU120 are functionally separated within the physical (PHY) layer defined by 3GPP.

O-DU110 may be called an O-RAN distribution unit. The O-DU110 is a logical node that mainly hosts a wireless link control layer (RLC), a medium access control layer (MAC), and a PHY-High layer based on the lower layer functional. Here, the O-DU110 is provided on the side closer to the NG-RAN20 with respect to the O-RU120. In the following, the side closer to NG-RAN20 may be referred to as the RAN side.

O-RU120 may be called an O-RAN radio unit. The O-RU120 is a logical node that mainly hosts the PHY-Low layer and RF processing based on the low-level functional division. Here, the O-RU120 is provided on the side away from the NG-RAN20 with respect to the O-DU110. In the following, the side away from the NG-RAN 20 may be referred to as the radio (air) side.

The PHY-High layer is the part of PHY processing on the O-DU110 side of the front hole interface, such as Forward Error Correction (FEC) encoding / decoding, scrambling, and modulation / demodulation.

The PHY-Low layer is the part of PHY processing on the O-RU120 side of the front hole interface, such as Fast Fourier Transform (FFT) / iFFT, digital beamforming, Physical Random Access Channel (PRACH) extraction and filtering.

O-CU is an abbreviation for O-RANControlUnit, which is a logical node that hosts PacketDataConvergenceProtocol (PDCP), RadioResourceControl (RRC), ServiceDataAdaptationProtocol (SDAP), and other control functions. ..

The front hall (FH) may be interpreted as a line between the baseband processing unit of a wireless base station (base station device) and the wireless device, and an optical fiber or the like is used.

(3) Shared Cell configuration As described above, in O-RAN, there is also a stationing method in which one cell is configured by multiple O-RUs, a configuration using a device (FHM: Fronthaul Multiplexing) that bundles O-RUs, and continuous operation. A configuration for connecting O-RUs (cascade configuration) is being studied. Collectively, these are called Shared Cell.

FIGS. 3A to 3C show a configuration example of the front hall. FIG. 3A is an example in which one cell is configured by 1O-RU. On the other hand, FIGS. 3B and 3C show an example of the Shared Cell configuration.

Specifically, FIG. 3B shows a configuration example using FHM130. Further, FIG. 3C shows an example in which O-RU130A is interposed between O-DU110 and O-RU120 and cascade-connected.

In the case of FIG. 3B, the FHM130 combines two FH signals from each O-RU120 and then transmits the two FH signals to the O-DU110. In such a case, the O-DU110 is an example of a first base station provided on the RAN side of the FHM130, and the O-RU120 is an example of a second base station provided on the air side of the FHM130.

Further, in the case of FIG. 3C, the O-RU130A includes a signal received by the O-RU130A (O-RU (1)) itself in the radio section and an FH signal received from the O-RU120 (O-RU (2)). Is synthesized and then sent to O-DU110. In such a case, the O-DU110 is an example of the first base station provided on the RAN side of the FHM130, and the O-RU120 (O-RU (2)) is provided on the air side of the FHM130. This is an example of two base stations.

In the following description, FHM130 and O-RU130A are collectively referred to as intermediate device 130. However, the name of the intermediate device may be called by another name. The intermediate device 130 is provided on the air side of the O-DU 110 constituting the first base station, and is provided on the RAN side of the O-RU 120 constituting the second base station.

As a feature of such a Shared Cell configuration, the intermediate device 130 transfers the DL signal received from the O-DU110 (first base station) to the O-RU120 (second base station) for the downlink (DL). To do. In the case of cascade connection of O-RU, the intermediate device 130 may further transmit the DL signal of the O-RU itself.

For the uplink (UL), the intermediate device 130 synthesizes the UL signal received from the O-RU120 (second base station) and transfers it to the O-DU110 (first base station). In the case of O-RU cascade connection, the radio signal received by O-RU itself is also combined.

With such features, the O-DU110 can process signals as if one O-RU was connected.

(4) Various signals between O-DU and O-RU Fig. 4 shows various signals in the front hole (FH) between O-DU110 and O-RU120. As shown in FIG. 4, signals in a plurality of planes are transmitted and received between O-DU110 and O-RU120.

Specifically, U / C / M / S-plane signals are transmitted and received. C-Plane is a protocol for transferring control signals, and U-Plane is a protocol for transferring user data. In addition, S-Plane is a protocol for realizing synchronization between devices. M-Plane is a management plane that handles maintenance and monitoring signals.

More specifically, the U-Plane signal includes a (DL) signal transmitted by the O-RU120 to the radio section and a (UL) signal received from the radio section, and is exchanged by a digital IQ signal. In addition to so-called U-Plane signals (data such as User Datagram Protocol (UDP) and Transmission Control Protocol (TCP)), C-Plane (RRC, Non-Access Stratum (NAS), etc.) defined by 3GPP is also available. , It should be noted that all are U-Planes from the viewpoint of FH.

The C-Plane signal includes signals necessary for various controls related to transmission / reception of U-Plane signals (signals for notifying information related to radio resource mapping and beamforming of the corresponding U-Plane). It should be noted that the signal is completely different from the C-Plane (RRC, NAS, etc.) defined in 3GPP.

The M-Plane signal includes the signal necessary for managing the O-DU110 / O-RU120. For example, it is a signal for notifying various hardware (HW) capabilities of O-RU120 to O-RU120 and notifying various setting values from O-DU110 to O-RU120.

The S-Plane signal is a signal required for synchronous control between O-DU110 / O-RU120.

(5) Functional Block Configuration of Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of the O-DU 110 and the intermediate device 130 will be described.

(5.1) O-DU110
FIG. 5 is a functional block configuration diagram of the O-DU110. As shown in FIG. 5, the O-DU 110 includes a communication unit 111, an acquisition unit 113, a notification unit 115, and a control unit 117.

The communication unit 111 executes communication with the O-RU 120 and the intermediate device 130. Specifically, the communication unit 111 is connected to the FH line and can transmit and receive signals of various planes shown in FIG.

Acquisition unit 113 acquires various parameters. For example, the acquisition unit 113 may acquire the parameters shown below for the UL signal.

The parameters may include parameters (Ta4_min, Ta4_max) that define the reception window (Reception window (UL)) of the O-DU110. The parameters (Ta4_min, Ta4_max) may be interpreted as the measurement results from reception at the O-RU antenna to reception at the O-DU port (R4). The parameters (Ta4_min, Ta4_max) may be measured by a delay measurement message (Measured Transport Method).

The parameters may include the parameters (Ta3_min, Ta3_max) that define the transmission window (UL) of the O-RU120. The parameters (Ta3_min, Ta3_max) may be interpreted as the measurement results from reception at the O-RU antenna to output at the O-RU port (R3). The parameters (Ta3_min, Ta3_max) are an example of the ability information of O-RU120. The parameters (Ta3_min, Ta3_max) may be received from O-RU120.

The parameter may include a parameter (T34_min) indicating the difference between Ta4_min and Ta3_min. The parameter may include a parameter (T34_max) indicating the difference between Ta4_max and Ta3_max.

As the parameter, a parameter (for example, T_Comb) indicating the processing time of the intermediate device 130 may be acquired. The parameter (eg, T_Comb) may be received from the intermediate device 130. The processing time in the intermediate device 130 may be interpreted as the time inside the intermediate device 130 required to combine the FH signals received from the plurality of O-RU 120s in the intermediate device 130. The processing time may be a time required for the synthesis itself plus a time such as a certain margin. The processing time may be referred to by another name, for example, operating time, internal delay, processing delay, synthesis time, and the like.

As the parameter, parameters indicating the delay time between the intermediate device 130 and the O-DU110 (for example, T_FH1_min, T_FH1_max) may be acquired. Parameters (eg, T_FH1_min, T_FH1_max) may be measured or calculated by the O-DU110 based on the UL signal. In the following, the FH between the intermediate device 130 and the O-DU110 will be referred to as FH1.

As the parameter, parameters indicating the delay time between the O-RU 120 and the intermediate device 130 (for example, T_FH2_min, T_FH2_max) may be acquired. The parameters (eg, T_FH2_min, T_FH2_max) may be measured or calculated by the intermediate device 130 based on the UL signal. Parameters (eg, T_FH2_min, T_FH2_max) may be received from intermediate device 130. In the following, the FH between the O-RU 120 and the intermediate device 130 will be referred to as FH2.

The acquisition unit 113 may acquire the parameters shown below for the DL signal.

The parameters may include parameters (Ta1_min, Ta1_max) that define the transmission window (Transmission window (DL)) of the O-DU110. The parameters (Ta1_min, Ta1_max) may be interpreted as the measurement results from the output at the O-DU port (R1) to the wireless transmission. The parameters (Ta1_min, Ta1_max) may be measured by a delay measurement message (Measured Transport Method).

The parameters may include parameters (Ta2_min, Ta2_max) that define the reception window (Reception window (DL)) of the O-RU120. The parameters (Ta2_min, Ta2_max) may be interpreted as measurement results from reception at the O-RU port (R2) to wireless transmission. The parameters (Ta2_min, Ta2_max) are an example of the ability information of O-RU120. The parameters (Ta2_min, Ta2_max) may be received from O-RU120.

The parameter may include a parameter (T12_min) indicating the difference between Ta1_min and Ta2_min. The parameter may include a parameter (T12_max) indicating the difference between Ta1_max and Ta2_max.

As the parameter, a parameter (for example, T_Copy) indicating the processing time of the intermediate device 130 may be acquired. The parameter (eg, T_Copy) may be received from the intermediate device 130. The processing time in the intermediate device 130 may be interpreted as the time inside the intermediate device 130 required to copy the FH signal transmitted to the plurality of O-RU 120s in the intermediate device 130. The processing time may be a time required for the duplication itself plus a time such as a certain margin. The processing time may be referred to by another name, for example, operating time, internal delay, processing delay, replication time, and the like.

As the parameter, parameters indicating the delay time between the intermediate device 130 and the O-DU110 (for example, T_FH1_min, T_FH1_max) may be acquired. The parameters (eg, T_FH1_min, T_FH1_max) may be measured or calculated by the intermediate device 130 based on the DL signal. Parameters (eg, T_FH1_min, T_FH1_max) may be received from intermediate device 130.

As the parameter, parameters indicating the delay time between the O-RU 120 and the intermediate device 130 (for example, T_FH2_min, T_FH2_max) may be acquired. Parameters (eg, T_FH2_min, T_FH2_max) may be measured or calculated on the O-RU120 based on the DL signal. Parameters (eg, T_FH2_min, T_FH2_max) may be received from O-RU120.

Note that min and max may mean the minimum and maximum values of propagation delay. Further, the propagation delay may be referred to by another name, for example, transmission delay, transmission time, delay time, transfer delay, delay, or the like.

Notification unit 115 notifies each information. For example, the notification unit 115 notifies the intermediate device 130 of parameters (for example, TH_min, TH_max) used for determining the data reception timing in the intermediate device 130. As will be described later, the parameters (eg, TH_min, TH_max) are determined based on the processing time (eg, T_Comb, T_Copy) in the intermediate device 130. In the embodiment, the notification unit 115 constitutes a transmission unit that transmits parameters (for example, TH_min, TH_max) to the intermediate device 130.

The control unit 117 controls the values of various parameters used on the FH. In particular, in the embodiment, the control unit 117 controls the value related to the propagation delay between O-DU110 and O-RU120 (including the case where the intermediate device 130 intervenes).

For example, the control unit 117 may determine the reception window (Ta4_min, Ta4_max) applied to the O-DU110 itself based on the propagation delay (T34_min, T34_max) between O-DU110 and O-RU120 for the UL signal. Good. Similarly, the control unit 117 determines the transmission window (Ta1_min, Ta1_max) applied to the O-DU110 itself based on the DL propagation delay (T12_min, T12_max) between the O-DU110 and the O-RU120 for the DL signal. You may.

In the embodiment, the control unit 117 constitutes a control unit that determines parameters (for example, TH_min, TH_max) used in determining the data reception timing in the intermediate device 130. The control unit 117 may determine the parameters (for example, TH_min, TH_max) based on the processing time (for example, T_Comb, T_Copy) in the intermediate device 130. The control unit 117 may determine the parameters of the O-DU 110 based on the capability information of the O-RU 120. The control unit 117 may determine the parameters based on the delay time between the intermediate device 130 and the O-DU 110. The control unit 117 may determine the parameters based on the delay time between the O-RU 120 and the intermediate device 130.

For example, the control unit 117 may determine parameters (for example, TH_min, TH_max) for the UL signal based on the following equation as shown in FIG.

TH_min = Ta3_min + T_FH2_min
TH_max = Ta4_max-T_FH1_max-T_Comb
Here, Ta3_min is an example of the ability information of O-RU120. T_FH2_min is the minimum delay time between O-RU120 and intermediate device 130. Ta4_max is the sum of Ta3_max and T34_max. Ta3_max is an example of the ability information of O-RU120. T34_max is the maximum propagation delay for the UL signal between O-DU110 and O-RU120. T_FH1_max is the maximum value of the delay time between the intermediate device 130 and the O-DU110. T_Comb is the processing time of the intermediate device 130.

As shown in FIG. 7, the parameters (TH_min, TH_max) may be considered as parameters that define the reception window of the intermediate device 130 regarding the UL signal. The parameters (TH_min, TH_max) may be considered as a threshold value used for determining the reception timing of the UL signal.

Furthermore, for TH_min, Ta3_min may be used without considering T_FH2_min (that is, TH_min = Ta3_min may be used).

The formulas for calculating TH_min and TH_max are not limited to the above formulas. The formulas for calculating TH_min and TH_max may be rewritten as long as the relationship shown in FIG. 7 is satisfied. In such cases, the minimum propagation delay values (eg, T_FH1_min, T_FH2_min) need not be considered in the equations for calculating TH_min and TH_max. In other words, the minimum delay time (for example, T_FH1_min, T_FH2_min) may be set to zero.

Similarly, for the DL signal, the control unit 117 may determine parameters (for example, TH_min, TH_max) based on the following equation as shown in FIG.

TH_min = Ta1_max-T_FH1_min (= T2a_max + T_FH2_min + T_copy)
TH_max = Ta1_min-T_FH1_max (= T2a_min + T_FH2_max + T_copy)
Here, Ta1_max is the sum of Ta2_max and T12_min. Ta2_max is an example of the ability information of O-RU120. T12_min is the minimum value of the propagation delay for the DL signal between O-DU110 and O-RU120 (ie, T_FH1_min + T_Copy + T_FH2_min). T_FH1_min is the minimum value of the delay time between the intermediate device 130 and the O-DU110. Ta1_min is the sum of Ta2_min and T12_max. Ta2_min is an example of the ability information of O-RU120. T12_max is the maximum value of the propagation delay for the DL signal between O-DU110 and O-RU120 (ie, T_FH1_max + T_Copy + T_FH2_max). FH2_max is the maximum delay time between O-RU120 and intermediate device 130. T_Copy is the processing time of the intermediate device 130.

As shown in FIG. 8, the parameters (TH_min, TH_max) may be considered as parameters that define the reception window of the intermediate device 130 regarding the UL signal. The parameters (TH_min, TH_max) may be considered as a threshold value used for determining the reception timing of the DL signal.

Furthermore, for TH_max, Ta1_max may be used without considering T_FH1_min (that is, TH_min = Ta3_min may be used).

The formulas for calculating TH_min and TH_max are not limited to the above formulas. The formulas for calculating TH_min and TH_max may be rewritten as long as the relationship shown in FIG. 8 is satisfied. In such cases, the minimum propagation delay values (eg, T_FH1_min, T_FH2_min) need not be considered in the equations for calculating TH_min and TH_max. In other words, the minimum value of the propagation delay (for example, T_FH1_min, T_FH2_min) may be set to zero.

(5.2) Intermediate device 130
FIG. 6 is a functional block configuration diagram of the intermediate device 130. As shown in FIG. 6, the intermediate device 130 is provided on the FH and includes a communication unit 131, a notification unit 133, an acquisition unit 135, and a control unit 137.

Communication unit 131 executes communication with O-DU110 and O-RU120. Specifically, the communication unit 131 is connected to the FH line and can transmit and receive signals of various planes shown in FIG.

Notification unit 133 notifies each information. For example, the notification unit 133 notifies the O-DU 110 of parameters (for example, T_Comb, T_Copy) indicating the processing time of the intermediate device 130.

Acquisition unit 135 acquires various parameters. For example, the acquisition unit 135 acquires parameters (for example, TH_min, TH_max) used in determining the data reception timing in the intermediate device 130. In the embodiment, the acquisition unit 135 constitutes a reception unit that receives parameters (for example, TH_min, TH_max) from the O-DU 110.

The control unit 137 constitutes a control unit that executes control for determining the data reception timing in the intermediate device 130. Specifically, the control unit 137 executes control for determining the data reception timing based on the parameters (TH_min, TH_max) received from the O-DU 110. For example, the control unit 137 may determine whether or not the data is received at a timing earlier than the timing defined by the parameter (TH_min) based on the parameter (TH_min) received from the O-DU 110. The control unit 137 may determine whether or not the data is received at a timing later than the timing defined by the parameter (TH_max) based on the parameter (TH_max) received from the O-DU 110.

Here, the control unit 137 may have a counter (Performance counter (s)) shown in FIG. For example, the control unit 137 may have a counter (for example, Rx_on_time_for_shared_cell) that counts the number of times data is received at an appropriate timing. The appropriate timing is later than the timing defined by the parameter (TH_min) and earlier than the timing defined by the parameter (TH_max). The control unit 137 may have a counter (Rx_early_for_shared_cell) that counts the number of times data is received at a timing earlier than the timing defined by the parameter (TH_min). The control unit 137 may have a counter (Rx_late_for_shared_cell) that counts the number of times data is received at a timing later than the timing defined by the parameter (TH_max).

However, the name and meaning of the counter shown in FIG. 9 are arbitrary. For example, the names (Rx_on_time, Rx_early, Rx_late) of the counters (Performance counter (s)) defined in ORAN-WG4.CUS.0-v02.00 may be used. The count value of such a count is used to determine whether or not the installation position of the intermediate device 130 is appropriate. For example, the telecommunications carrier may change the installation position of the intermediate device 130 based on the count value.

When the intermediate device 130 also functions as an O-RAN, the intermediate device 130 may have both a counter used as the intermediate device 130 and a counter used as the O-RAN. The counter used as O-RAN may be the counter (Performance counter (s)) defined in ORAN-WG4.CUS.0-v02.00.

(6) Operation of Wireless Communication System Next, the operation of the wireless communication system 10 will be described. Specifically, the operation between O-DU110 and O-RU120 (including the intermediate device 130) constituting the gNB100 will be described.

As shown in FIG. 10, in step S10, the O-DU 110 receives parameters (for example, T_Comb, T_Copy) indicating the processing time of the intermediate device 130 from the intermediate device 130. The O-DU110 may receive parameters indicating the delay time between the intermediate device 130 and the O-DU110 (for example, T_FH1_min, T_FH1_max).

In step S11, the O-DU110 receives parameters indicating the ability information of the O-RU120 (for example, T3a_min, T3a_max, T2a_min, T2a_max). The O-DU110 may receive parameters indicating the delay time between the O-RU 120 and the intermediate device 130 (for example, T_FH2_min, T_FH2_max).

In step S12, the O-DU 110 determines the parameters (for example, TH_min, TH_max) used to determine the data reception timing in the intermediate device 130. The O-DU110 may determine the parameters based on the processing time of the intermediate device 130. The O-DU110 may determine the parameters based on the capability information of the O-RU120. The O-DU110 may determine the parameters based on the delay time between the intermediate device 130 and the O-DU110. The O-DU110 may determine the parameters based on the delay time between the O-RU120 and the intermediate device 130.

In step S13, the O-DU110 transmits the parameters (for example, TH_min, TH_max) determined in step S12 to the intermediate device 130.

In step S14, the intermediate device 130 determines the data reception timing based on the parameters (for example, TH_min, TH_max) received in step S13. For example, as described with reference to FIG. 9, the intermediate device 130 may count the number of times data is received at an appropriate timing. The intermediate device 130 may count the number of times data is received at a timing earlier than the timing defined by the parameter (TH_min). The intermediate device 130 may count the number of times data is received at a timing later than the timing defined by the parameter (TH_max).

(7) Action / Effect In the embodiment, the O-DU 110 determines the parameters (for example, TH_min, TH_max) used in the intermediate device 130 for determining the data reception timing, and transmits the determined parameters to the intermediate device 130. You may. According to such a configuration, the intermediate device 130 can appropriately determine the data reception timing. As a result, it can be determined whether or not the installation position of the intermediate device 130 is appropriate.

In the embodiment, the parameters (eg, TH_min, TH_max) may be determined based on the processing time of the intermediate device 130. According to such a configuration, an appropriate parameter can be set as a parameter used for determining the data reception timing in the intermediate device 130.

In embodiments, the parameters (eg, TH_min, TH_max) may be determined based on the capability information of the O-RU120 or based on the delay time between the intermediate device 130 and the O-DU110. , O-DU110 may be determined based on the delay time between O-RU120 and intermediate device 130. According to such a configuration, more appropriate parameters can be set.

In the embodiment, whether or not the installation position of the intermediate device 130 is appropriate by introducing a new mechanism (for example, the counter shown in FIG. 9) that the data reception timing should be determined in the intermediate device 130. Can be determined.

[Change example 1]
Hereinafter, modification 1 of the embodiment will be described. In the following, the differences from the embodiments will be mainly described.

In the embodiment, a case where one O-RU120 is provided on the air side of the intermediate device 130 is illustrated. On the other hand, in the first modification, a case where two or more O-RU 120s are provided on the air side of the intermediate device 130 will be described. Since the DL signal can be considered in the same way as the UL signal, the UL signal will be described here as an example.

As shown in FIG. 11, O-RU120X and O-RU120Y are provided on the air side of the intermediate device 130. Here, the FH between the O-DU110 and the intermediate device 130 is called FH1, the FH between the intermediate device 130 and the O-RU120X is called FH2-1, and between the intermediate device 130 and the O-RU120Y. FH is called FH2-2. FIG. 11 illustrates a case where the propagation delay of FH2-1 is larger than the propagation delay of FH2-2.

Even in such a case, the O-DU 110 determines the parameters (for example, TH_min, TH_max) used in the intermediate device 130 for determining the data reception timing, as in the embodiment.

Here, the O-DU110 may determine TH_min with reference to the O-RU120Y having a small propagation delay. O-DU110 may determine TH_max with reference to O-RU120X, which has a large propagation delay. Therefore, TH_min and TH_max may be expressed by the following equations.

TH_min = Ta3_min (O-RU120Y) + T_FH2-2_min
TH_max = Ta4_max-T_FH1_max-T_Comb
Here, Ta4_max is the sum of Ta3_max (O-RU120X) and T34_max (O-RU120X). T34_max (O-RU120X) is the sum of T_FH2-1max, T_Comb (O-RU120X), and T_FH1_max.

Note that the concept of modification 1 can be applied to the case where three or more O-RU120s are provided on the air side of the intermediate device 130. That is, TH_min is determined based on O-RU120 having the smallest propagation delay, and TH_max is determined based on O-RU120 having the largest propagation delay.

[Change example 2]
Hereinafter, modification 2 of the embodiment will be described. In the following, the differences from the embodiments will be mainly described.

In the embodiment, a case where one intermediate device 130 is provided between the O-DU 110 and the O-RU 120 is illustrated. On the other hand, in the second modification, a case where two or more intermediate devices 130 are provided in series between the O-DU 110 and the O-RU 120 will be illustrated. Since the DL signal can be considered in the same way as the UL signal, the UL signal will be described here as an example.

As shown in FIG. 12, an intermediate device 130P and an intermediate device 130Q are provided in series between the O-DU 110 and the O-RU 120. Here, the FH between the O-DU110 and the intermediate device 130P is called FH1, the FH between the intermediate device 130P and the intermediate device 130Q is called FH2, and the FH between the intermediate device 130Q and the O-RU120X. Is called FH3.

In such a case, the O-DU110 determines the parameters (TH_min and TH_max) for each of the intermediate device 130P and the intermediate device 130Q. The parameters used in the intermediate device 130P are called TH (p) _min and TH (p) _max, and the parameters used in the intermediate device 130Q are called TH (q) _min and TH (q) _max. For example, these parameters may be expressed by the following equation as shown in FIG.

TH (p) _min = Ta3_min + T_FH3_min + T_Comb (intermediate device 130Q) + T_FH2_min
TH (p) _max = Ta4_max-T_FH1_max-T_Comb (intermediate device 130P)
TH (q) _min = Ta3_min + T_FH3_min
TH (p) _max = Ta4_max-T_FH1_max-T_Comb (intermediate device 130P)-T_FH2_max-T_Comb (intermediate device 130Q)
The concept of the second modification can also be applied to the case where three or more intermediate devices 130 are provided between the O-DU 110 and the O-RU 120.

[Other Embodiments]
Although the contents of the present invention have been described above with reference to Examples, it is obvious to those skilled in the art that the present invention is not limited to these descriptions and various modifications and improvements can be made.

For example, in the above-described embodiment, TH_min and TH_max are used as the names of the parameters used in determining the data reception timing in the intermediate device 130. However, the embodiment is not limited to this. For example, TH_min may be referred to as the start timing of the receive window of the intermediate device 130, or may be referred to as a parameter that defines the start timing. Similarly, TH_max may be referred to as the end timing of the receive window of the intermediate device 130, or may be referred to as a parameter that defines the end timing. The term reception window of the intermediate device 130 may be referred to as a waiting time of the intermediate device 130 when two or more O-RA 130s are provided on the air side of the intermediate device 130.

In the above-described embodiment, the O-DU 110 notifies the intermediate device 130 of TH_min and TH_max) as parameters used for determining the reception timing. However, the embodiment is not limited to this. For example, information known to the intermediate device 130 (eg, max-T_Comb) need not be notified. For example, taking TH_max as an example, if “Ta4_max-T_FH1_max” has already been notified to the intermediate device 130, by omitting the notification of “max-T_Comb”, the O-DU110 can be sent to the intermediate device 130. The amount of signaling can be reduced.

In the above-described embodiment, as shown in FIGS. 3B and 3C, an example in which FHM or O-RU (cascade connection) is applied as the intermediate device 130 is shown separately, but on the same FH, with FHM. , O-RU by cascade connection may be configured in a complex manner.

In the above-described embodiment, the configuration of the FH according to the O-RAN specifications has been described, but the FH does not necessarily have to comply with the O-RAN specifications. For example, at least some of the O-DU110, O-RU120 and intermediate device 130 may comply with the FH specifications specified in 3GPP.

The block configuration diagrams (FIGS. 5 and 6) used in the description of the above-described embodiment show blocks for 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 using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , 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, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (constituent unit) for functioning transmission is called a transmitting unit or a transmitter. As described above, the method of realizing each of them is not particularly limited.

Further, the above-mentioned O-DU110 and the intermediate device 130 (the device) may function as a computer that processes the wireless communication method of the present disclosure. FIG. 13 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 13, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device 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.

Each functional block of the device (see FIGS. 5 and 6) is realized by any hardware element of the computer device or a combination of the hardware elements.

Further, for each function in the device, by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, the processor 1001 performs the calculation, controls the communication by the communication device 1004, and the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 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) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 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. Further, the various processes described above may be executed by one processor 1001 or 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 memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

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

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts 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).

In addition, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. Bus 1007 may be configured using a single bus or may be configured using different buses for each device.

Further, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

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, Downlink Control Information (DCI), Uplink Control Information (UCI), upper layer signaling (eg, RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or a combination thereof. RRC signaling may also be referred to as an RRC message, for example, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one. In addition, 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 disclosure 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 in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

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

The determination 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, a predetermined value). It may be done by comparison with the value).

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.

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, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), 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) 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 various channels (eg, 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 in any respect limited names. is not it.

In this disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group" Terms such as "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 (also called sectors). When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.

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

Mobile stations can be used by those skilled in the art as 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, wireless. It may also be referred to as a 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 (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) 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 a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. In addition, words such as "up" and "down" may be read as words corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.

Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions of the mobile station.
The radio 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 Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transmission / reception. At least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.

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

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. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as 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. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. 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 an LTE system, a base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, 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 mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) 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 called 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 also 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.) may be read as 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 RB may be the same regardless of 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 (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), 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 (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. Good. 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.

BWP may include BWP for UL (UL BWP) and 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 RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

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 connection or connection 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. , Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions, etc., can be considered to be "connected" or "coupled" to each other.

The reference signal can also be abbreviated as Reference Signal (RS) and may be called a pilot (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".

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

Any reference to elements using designations such as "first", "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 there, or that the first element must somehow precede the second element.

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

In the present disclosure, if 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.

The terms "determining" and "determining" used in this 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 (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, 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.

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".

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 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 Radio communication system 20 NG-RAN
100 gNB
110 O-DU
111 Communication unit 113 Acquisition unit 115 Parameter control unit 117 Parameter notification unit 120 O-RU
130 Intermediate device (FHM)
130A O-RU
131 Communication unit 133 Processing time notification unit 135 Parameter acquisition unit 137 Parameter setting unit 200 UE
1001 Processor 1002 Memory 1003 Storage 1004 Communication Device 1005 Input Device 1006 Output Device 1007 Bus

Claims

A communication device that constitutes the first base station provided on the front hall.
A control unit that determines the parameters used to determine the data reception timing in the intermediate device provided on the front hall.
A communication device including a transmission unit that transmits the parameters to the intermediate device.
The communication device according to claim 1, wherein the control unit determines a parameter set in the intermediate device based on the processing time in the intermediate device.
The communication device according to claim 1, wherein the control unit determines the parameters based on the capability information of the second base station provided on the front hall.
The control unit determines the parameter based on at least one of a delay time between the intermediate device and the communication device and a delay time between the second base station and the intermediate device. The communication device according to claim 1 or 2.
A communication device that constitutes an intermediate device installed on the front hall.
A control unit that executes control to determine the data reception timing in the intermediate device, and
A communication device including a receiving unit that receives parameters used for determining the reception timing from a first base station provided on the front hall.