CN114788332A - communication device - Google Patents

Abstract

A communication device constituting a1 st base station installed in a forward link includes: a control unit that determines a parameter used for determining a reception timing of data by an intermediate device provided in the preamble; and a transmitting unit that transmits the parameter to the intermediate device.

Description

communication device

technical field

The present invention relates to a communication device corresponding to a fronthaul interface.

Background technique

The O-RAN Alliance (O-RAN Alliance) was established for the purpose of promoting the openness and intelligence of the Radio Access Network (RAN) in the 5G era. Currently, a large number of operators/suppliers have joined and discussed.

In O-RAN, a variety of architectures are discussed, and as one of them, an "open fronthaul (FH) interface" that realizes interconnection between the baseband processing part and the radio part between different providers is discussed.

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

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

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

In addition, in the current O-RAN FH standard, it is premised on a cell placement method in which one cell is configured by one O-RU. On the other hand, there is also a method of deploying a cell by configuring a plurality of O-RUs, and the extension of the standard for this content has been studied. Specifically, a configuration (FHM configuration) using a device that bundles O-RUs (FHM: Fronthaul Multiplexing), and a configuration in which O-RUs are continuously connected (cascading configuration) are studied. These are collectively referred to as a shared cell (Shared Cell). In addition, in the following description, the FHM and the O-RU (cascade O-RU) interposed therebetween are collectively referred to as an intermediate device (provisional name).

prior art literature

Non-patent literature

Non-Patent Document 1: "ORAN-WG4.CUS.0-v02.00", O-RAN Fronthaul Working Group, Control, User and Synchronization Plane Specification, O-RAN Alliance, August 2019

SUMMARY OF THE INVENTION

Invention to solve problem

However, in the configuration of the shared cell as described above, the FH delay of O-DU-intermediate, intermediary-intermediate, and intermediary-O-RU varies depending on the installation position of the intermediary.

However, there is no mechanism for determining whether the installation position of the intermediate device is appropriate, and it is difficult to optimize the FH including the intermediate device.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a communication device capable of determining whether the installation position of the intermediate device is appropriate even when the Shared Cell configuration in the fronthaul (FH) interface is applied.

According to one aspect of the present disclosure, there is provided a communication device that constitutes a first base station provided on the fronthaul, the communication device having a control unit that determines an operation performed in an intermediate device provided on the fronthaul a parameter used for determination of data reception timing; and a transmission unit that transmits the parameter to the intermediate device.

According to one aspect of the present disclosure, there is provided a communication device that constitutes an intermediate device provided on the fronthaul, the communication device having: a control unit that executes control for determining the reception timing of data in the intermediate device; and a receiving unit that receives the parameter used for the determination of the reception timing from the first base station provided on the fronthaul.

Description of drawings

FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to the embodiment.

FIG. 2 is a diagram showing an example of the internal configuration of the gNB 100 using the fronthaul (FH) interface according to the embodiment.

FIG. 3A is a diagram showing a configuration example of a fronthaul (without an intermediate device) according to the embodiment.

FIG. 3B is a diagram showing a configuration example (existence of an intermediate device, FHM arrangement) of the prehaul according to the embodiment.

3C is a diagram showing a configuration example of the fronthaul according to the embodiment (existence of an intermediate device, cascaded configuration).

FIG. 4 is a diagram showing various signals in the fronthaul (FH) between the O-DU 110 to the O-RU 120 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 the fronthaul in the UL according to the embodiment.

FIG. 8 is a diagram showing an example of delay management of the fronthaul in the DL according to the embodiment.

FIG. 9 is a diagram showing an example of the 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 fronthaul in the UL according to Modification 1. FIG.

FIG. 12 is a diagram showing an example of delay management of the fronthaul in the DL according to Modification 1. FIG.

FIG. 13 is a diagram showing an example of the hardware configuration of the O-DU 110 and the intermediate device 130 .

Detailed ways

Hereinafter, embodiments will be described based on the drawings. In addition, the same or similar code|symbol is attached|subjected to the same function and structure, and the description is abbreviate|omitted suitably.

[Embodiment]

(1) Overall schematic configuration of a wireless communication system

FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to the present embodiment. In an embodiment, the wireless communication system 10 is a wireless communication system based on 5G New Radio (NR), including a Next Generation-Radio Access Network 20 (Next Generation-Radio Access Network 20, hereinafter referred to as NG-RAN 20) , and a terminal 200 (User Equipment 200, hereinafter referred to as UE 200).

The NG-RAN 20 includes a radio base station 100 (hereinafter referred to as a gNB 100). In addition, 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. 1 .

The NG-RAN 20 actually includes a plurality of NG-RAN nodes (NG-RAN Node), specifically, includes a plurality of gNBs (or ng-eNBs), and a core network (Evolved Packet Core, not shown) according to 4G. Or connected according to the 5G core network (5GC, not shown). In addition, NG-RAN 20 and 5GC can be simply expressed as "network".

The gNB 100 is a 5G-compliant radio base station, and performs 5G-compliant wireless communication with the UE 200 . The gNB 100 and the UE 200 can support Massive MIMO in which a beam with higher directivity is generated by controlling wireless signals transmitted from multiple antenna elements, carrier aggregation (CA) in which multiple component carriers (CCs) are bundled together, and in the UE Dual Connectivity (DC), etc., which communicate with two NG-RAN Nodes simultaneously.

Furthermore, in an embodiment, the gNB 100 employs a fronthaul (FH) interface specified by the O-RAN.

(2) Structure of Fronthaul (Fronthaul: Forward Backhaul)

FIG. 2 shows an example of the internal structure of the gNB 100 using a fronthaul (FH) interface. As shown in FIG. 2 , the gNB 100 includes an O-DU 110 (O-RAN Distributed Unit: O-RAN Distributed Unit) and an O-RU 120 (O-RAN Radio Unit: O-RAN Radio Unit). The O-DU 110 and the O-RU 120 are functionally split within the physical (PHY) layer specified by 3GPP.

The O-DU 110 may also be referred to as the O-RAN Distributed Unit. The O-DU 110 is a logical node that mainly hosts a radio link control layer (RLC), a medium access control layer (MAC), and a PHY-High layer based on lower layer functionalities. Here, the O-DU 110 is disposed on the side closer to the NG-RAN 20 than the O-RU 120 . Hereinafter, the side closer to the NG-RAN 20 may be referred to as the RAN side.

O-RU 120 may also be referred to as an O-RAN radio unit. The O-RU 120 is a logical node that mainly hosts the PHY-Low layer and RF processing based on the functional division of the lower layers. Here, the O-RU is disposed on the side away from the NG-RAN 20 with respect to the O-DU 110 . Hereinafter, the side away from the NG-RAN 20 may be referred to as an air side.

The PHY-High layer is a part of Forward Error Correction (FEC) encoding/decoding, scrambling, modulation/demodulation, etc., a part of PHY processing on the O-DU 110 side of the fronthaul interface.

The PHY-Low layer is Fast Fourier Transform (FFT)/iFFT, digital beamforming, Physical Random Access Channel (PRACH) extraction and filtering, etc. The fronthaul interface is on the O-RU 120 side part of the PHY processing.

O-CU is the abbreviation of O-RAN Control Unit (O-RAN Control Unit). (Service Data Adaptation Protocol: SDAP) and other control functions for hosting (host) logical nodes.

In addition, the fronthaul (FH) can be interpreted as a line between the baseband processing unit of the wireless base station (base station device) and the wireless device, and an optical fiber or the like can be used.

(3) Shared Cell configuration

As described above, in O-RAN, there is also a method for deploying a cell by configuring a plurality of O-RUs, and research is being performed on the configuration of a device using a bundled O-RU (FHM: Fronthaul Multiplexing), and the continuous connection of O-RUs. Configuration of RUs (cascaded configuration). These are collectively referred to as Shared Cells.

3A to 3C show structural examples of the fronthaul. FIG. 3A is an example of configuring one cell by one O-RU. In contrast to this, Figures 3B and 3C show examples of Shared Cell configurations.

Specifically, FIG. 3B shows a configuration example using the FHM 130 . Furthermore, FIG. 3C shows an example in which the O-RU 130A is connected in cascade between the O-DU 110 and the O-RU 120 .

In the case of FIG. 3B , the FHM 130 combines the two FH signals from each of the O-RUs 120 and sends them to the O-DU 110 . In this case, the O-DU 110 is an example of a first base station installed on the RAN side than the FHM 130 , and the O-RU 120 is an example of a second base station installed on the air side of the FHM 130 . An example.

Furthermore, in the case of FIG. 3C , the O-RU 130A compares the signal received by the O-RU 130A (O-RU(1)) itself in the wireless section with the signal received from the O-RU 120 (O-RU(2)) After the received FH signal is synthesized, it is sent to the O-DU 110. In this case, the O-DU 110 is an example of the first base station installed on the RAN side from the FHM 130 , and the O-RU 120 (O-RU(2)) is installed on the FHM 130 An example of the second base station on the air side.

In addition, in the following description, the FHM 130 and the O-RU 130A are collectively referred to as the intermediate device 130 . However, the name of the intermediate device may also be referred to by other names. The intermediate device 130 is installed on the air side of the O-DU 110 that constitutes the first base station, and is installed on the RAN side of the O-RU 120 that constitutes the second base station.

As a feature of such a Shared Cell configuration, for the downlink (DL), the intermediate device 130 forwards the DL signal received from the O-DU 110 (the first base station) to the O-RU 120 (the second base station). In addition, in the case of a cascade connection of O-RUs, the intermediary device 130 may transmit the DL signal of the O-RU itself.

In addition, for the uplink (UL), the intermediate device 130 combines the UL signal received from the O-RU 120 (second base station), and transfers it to the O-DU 110 (first base station). In addition, in the case of cascade connection of O-RUs, the wireless signals received by the O-RUs themselves are also synthesized together.

With this feature, the O-DU 110 can perform signal processing as in the case of connecting one O-RU.

(4) Various signals between O-DU and O-RU

FIG. 4 shows various signals in the fronthaul (FH) between O-DUs 110 to O-RUs 120 . As shown in FIG. 4 , signals in multiple planes are transmitted and received between the O-DU 110 to the O-RU 120 .

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

More specifically, the U-Plane signals include (DL) signals transmitted to the wireless section by the O-RU 120 and (UL) signals received in the wireless section, and interact with each other through digital IQ signals. In addition, it should be noted that in addition to the so-called U-Plane signal (User Datagram Protocol (User Datagram Protocol: UDP), Transmission Control Protocol (Transmission Control Protocol: TCP) and other data), from the viewpoint of FH, 3GPP defines The C-Plane (RRC, non-access stratum (Non-Access Stratum: NAS), etc.) also all become U-Plane.

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

The M-Plane signal contains the signals required for the management of the O-DU 110/O-RU 120. For example, it is a signal for notifying the O-RU 120 of various hardware (HW) capabilities of the O-RU 120 or notifying the O-RU 120 of various setting values from the O-DU 110 .

The S-Plane signal is a signal required for synchronization control between the O-DU 110/O-RU 120.

(5) Functional block structure of wireless communication system

Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block structures of the O-DU 110 and the intermediate device 130 will be described.

(5.1) O-DU 110

FIG. 5 is a functional block diagram of the O-DU 110 . 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 section 111 performs communication with the O-RU 120 and the intermediary device 130 . Specifically, the communication unit 111 is connected to the FH line, and can transmit and receive signals on various planes described in FIG. 4 .

The acquisition unit 113 acquires various parameters. For example, the acquisition unit 113 may acquire the following parameters for the UL signal.

The parameters may include parameters (Ta4_min, Ta4_max) that define the reception window (Reception window (UL)) of the O-DU 110 . The parameters (Ta4_min, Ta4_max) can be interpreted as measurements from reception in the O-RU antenna to reception in the O-DU port (R4). The parameters (Ta4_min, Ta4_max) can be measured by delaying the measurement message (Measured Transport Method).

The parameters may include parameters (Ta3_min, Ta3_max) that define the transmission window (UL) of the O-RU 120 . The parameters (Ta3_min, Ta3_max) can be interpreted as measurements from reception in the O-RU antenna to output in the O-RU port (R3). The parameters (Ta3_min, Ta3_max) are examples of capability information of the O-RU 120 . Parameters (Ta3_min, Ta3_max) may be received from the O-RU 120 .

The parameter may include a parameter (T34_min) representing 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.

For the parameter, a parameter (eg, T_Comb) representing the processing time of the intermediary device 130 can be obtained. The parameters (eg, T_Comb) may be received from the intermediary 130 . The processing time within the intermediary 130 may be interpreted as the time within the intermediary 130 required to combine the FH signals received from the plurality of O-RUs 120 in the intermediary 130 . The processing time may be obtained by adding a certain margin or the like to the time required for the synthesis itself. Processing time may be called by other names, such as action time, internal delay, processing delay, composition time, etc.

For the parameters, parameters representing the delay time between the intermediary 130 and the O-DU 110 (eg, T_FH1_min, T_FH1_max) can be obtained. Parameters (eg, T_FH1_min, T_FH1_max) may be measured or calculated by the O-DU 110 from the UL signal. Hereinafter, the FH between the intermediate device 130 and the O-DU 110 is referred to as FH1.

For the parameters, parameters representing the delay time between the O-RU 120 and the intermediary 130 (eg, T_FH2_min, T_FH2_max) may be obtained. Parameters (eg, T_FH2_min, T_FH2_max) may be measured or calculated by the intermediary device 130 from the UL signal. Parameters (eg, T_FH2_min, T_FH2_max) may be received from the intermediary 130 . Hereinafter, the FH between the O-RU 120 and the intermediate device 130 is referred to as FH2.

The acquisition unit 113 can acquire the following parameters for the DL signal.

The parameters may include parameters (Ta1_min, Ta1_max) that define the transmission window (DL) of the O-DU 110 . The parameters (Ta1_min, Ta1_max) can be interpreted as measurement results from the output in the O-DU port (R1) up to the wireless transmission. The parameters (Ta1_min, Ta1_max) can be measured by delaying the measurement message (MeasuredTransport Method).

The parameters may include parameters (Ta2_min, Ta2_max) for defining a reception window (Reception window (DL)) of the O-RU 120 . The parameters (Ta2_min, Ta2_max) can be interpreted as measurements from reception in the O-RU port (R2) until wireless transmission. The parameters (Ta2_min, Ta2_max) are examples of capability information of the O-RU 120 . Parameters (Ta2_min, Ta2_max) may be received from the O-RU 120 .

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

For the parameter, a parameter (eg, T_Copy) representing the processing time of the intermediary device 130 can be obtained. Parameters (eg, T_Copy) may be received from the intermediary 130 . Processing time within the intermediary 130 may be interpreted as the time within the intermediary 130 required to copy the FH signals sent to the plurality of O-RUs 120 in the intermediary 130 . The processing time may be obtained by adding a certain margin or the like to the time required for copying itself. Processing time may be called by other names, for example, action time, internal delay, processing delay, replication time, etc.

For the parameters, parameters representing the delay time between the intermediary 130 and the O-DU 110 (eg, T_FH1_min, T_FH1_max) can be obtained. Parameters (eg, T_FH1_min, T_FH1_max) may be measured or calculated by the intermediary 130 from the DL signal. Parameters (eg, T_FH1_min, T_FH1_max) may be received from the intermediary 130 .

For the parameters, parameters representing the delay time between the O-RU 120 and the intermediary 130 (eg, T_FH2_min, T_FH2_max) may be obtained. Parameters (eg, T_FH2_min, T_FH2_max) may be measured or calculated by the O-RU 120 based on the DL signal. Parameters (eg, T_FH2_min, T_FH2_max) may be received from the O-RU 120 .

In addition, min,max can represent the minimum and maximum values of the propagation delay. In addition, propagation delay may also be referred to by other names such as transfer delay, transfer time, delay time, forwarding delay, delay, and the like.

The notification unit 115 notifies each piece of information. For example, the notification unit 115 notifies the intermediate device 130 of parameters (eg, TH_min, TH_max) for determining the data reception timing in the intermediate device 130 . As described below, the parameters (eg, TH_min, TH_max) are determined according to the processing time (eg, T_Comb, T_Copy) within the intermediary 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 in the FH. In particular, in the embodiment, the control unit 117 controls the value related to the propagation delay between the O-DU 110 to the O-RU 120 (including the case where the intermediary device 130 intervenes).

For example, the control unit 117 may determine the reception window (Ta4_min, Ta4_max) applied to the O-DU 110 itself based on the propagation delays (T34_min, T34_max) between the O-DU 110 and the O-RU 120 for the UL signal. Similarly, the control unit 117 may determine the transmission window (Ta1_min, Ta1_max) applied to the O-DU 110 itself for the DL signal based on the DL propagation delay (T12_min, T12_max) between the O-DU 110 and the O-RU 120 .

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

For example, as shown in FIG. 7 , the control unit 117 may determine parameters (for example, TH_min, TH_max) according to the following equations for the UL signal.

TH_min=Ta3_min+T_FH2_min

TH_max=Ta4_max-T_FH1_max-T_Comb

Among them, Ta3_min is an example of capability information of the O-RU 120 . T_FH2_min is the minimum value of the delay time between the O-RU 120 and the intermediary 130 . Ta4_max is the sum of Ta3_max and T34_max. Ta3_max is an example of capability information of the O-RU 120 . T34_max is the maximum value of the propagation delay associated with the UL signal between O-DU 110 and O-RU 120. T_FH1_max is the maximum value of the delay time between the intermediary 130 and the O-DU 110 . T_Comb is the processing time of the intermediary 130 .

As shown in FIG. 7, the parameters (TH_min, TH_max) can be considered as parameters defining the reception window of the intermediate device 130 related to the UL signal. The parameters (TH_min, TH_max) can also be considered as thresholds for determining the reception timing of the UL signal.

In addition, regarding TH_min, Ta3_min may be used without considering T_FH2_min (that is, TH_min=Ta3_min may be used).

In addition, the equations for calculating TH_min and TH_max are not limited to the above equations. The equations for calculating TH_min and TH_max can be replaced within a range that satisfies the relationship shown in FIG. 7 . In this case, the minimum value of the propagation delay (eg, T_FH1_min, T_FH2_min) may not be considered in the equations for calculating TH_min and TH_max. In other words, the minimum value of the delay time (eg, T_FH1_min, T_FH2_min) may be set to zero.

Similarly, as shown in FIG. 8 , the control unit 117 can determine parameters (for example, TH_min, TH_max) for the DL signal according to the following equations.

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 capability information of the O-RU 120 . T12_min is the minimum value of the propagation delay related to the DL signal between O-DU 110 and O-RU 120 (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-DU 110 . Ta1_min is the sum of Ta2_min and T12_max. Ta2_min is an example of capability information of the O-RU 120 . T12_max is the maximum value of the propagation delay related to the DL signal between O-DU 110 and O-RU 120 (ie, T_FH1_max+T_Copy+T_FH2_max). FH2_max is the maximum value of the delay time between the O-RU 120 and the intermediate device 130 . T_Copy is the processing time of the intermediary 130 .

As shown in FIG. 8, the parameters (TH_min, TH_max) can be considered as parameters defining the reception window of the intermediate device 130 related to the UL signal. The parameters (TH_min, TH_max) can also be considered as threshold values for determining the reception timing of the DL signal.

In addition, regarding TH_max, Ta1_max may be used without considering T_FH1_min (that is, TH_min=Ta3_min may be used).

In addition, the equations for calculating TH_min and TH_max are not limited to the above equations. The equations for calculating TH_min and TH_max can be replaced within a range that satisfies the relationship shown in FIG. 8 . In this case, the minimum value of the propagation delay (eg, T_FH1_min, T_FH2_min) may not be considered in the equations for calculating TH_min and TH_max. In other words, the minimum values of the propagation delays (eg, T_FH1_min, T_FH2_min) may be set to zero.

(5.2) Intermediate device 130

FIG. 6 is a functional block 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 .

The communication unit 131 performs communication with the O-DU 110 and the O-RU 120 . Specifically, the communication unit 131 is connected to the FH line, and can transmit and receive signals on various planes shown in FIG. 4 .

The notification unit 133 notifies each piece of information. For example, the notification unit 133 notifies the O-DU 110 of a parameter (eg, T_Comb, T_Copy) indicating the processing time of the intermediary device 130 .

The acquisition unit 135 acquires various parameters. For example, the acquisition unit 135 acquires parameters (eg, TH_min, TH_max) for 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 reception timing of data in the intermediate device 130 . Specifically, the control unit 137 executes control for determining the reception timing of data 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 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 . Based on the parameter (TH_max) received from the O-DU 110, the control unit 137 can determine whether or not data is received at a timing later than the timing defined by the parameter (TH_max).

Here, the control unit 137 may have a counter (Performance counter(s)) shown in FIG. 9 . For example, the control unit 137 may have a counter (eg, 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 include 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 names and meanings of the counters shown in FIG. 9 may be arbitrary. For example, the names (Rx_on_time, Rx_early, Rx_late), etc. of the counters (Performance counter(s)) defined in ORAN-WG4.CUS.0-v02.00 can be used. The count value thus counted is used to determine whether or not the installation position of the intermediate device 130 is appropriate. For example, the communication carrier may change the installation position of the intermediary device 130 according to the count value.

In addition, when the intermediary apparatus 130 also functions as the O-RAN, the intermediary apparatus 130 may have both a counter for the intermediary apparatus 130 and a counter for the O-RAN. The counter used as O-RAN may be a counter (Performance counter(s)) defined in ORAN-WG4.CUS.0-v02.00.

(6) Operation of the wireless communication system

Next, the operation of the wireless communication system 10 will be described. Specifically, the operation between the O-DU 110 to the O-RU 120 (including the intermediate device 130 ) constituting the gNB 100 will be described.

As shown in FIG. 10 , in step S10 , the O-DU 110 receives parameters (eg, T_Comb, T_Copy) representing the processing time of the intermediary device 130 from the intermediary device 130 . O-DU 110 may also receive parameters (eg, T_FH1_min, T_FH1_max) representing the delay time between intermediary 130 and O-DU 110 .

In step S11, the O-DU 110 receives parameters representing capability information of the O-RU 120 (eg, T3a_min, T3a_max, T2a_min, T2a_max). O-DU 110 may receive parameters (eg, T_FH2_min, T_FH2_max) that represent the delay time between O-RU 120 and intermediary 130 .

In step S12, the O-DU 110 decides parameters (eg, TH_min, TH_max) for determining the reception timing of data in the intermediate device 130. The O-DU 110 may decide the parameters according to the processing time of the intermediary device 130 . The O-DU 110 may also determine the parameters according to the capability information of the O-RU 120 . The O-DU 110 may decide the parameters according to the delay time between the intermediary 130 and the O-DU 110 . The O-DU 110 may also decide the parameters according to the delay time between the O-RU 120 and the intermediary device 130 .

In step S13, the O-DU 110 transmits the parameters (eg, TH_min, TH_max) determined in step S12 to the intermediate device 130.

In step S14, the intermediary device 130 determines the data reception timing based on the parameters (eg, TH_min, TH_max) received in step S13. For example, as illustrated in FIG. 9, the intermediary 130 may count the number of times data is received at the appropriate timing. The intermediary 130 may count the number of times data is received at a timing earlier than the timing defined by the parameter (TH_min). The intermediary 130 may also count the number of times data is received at a timing later than the timing defined by the parameter (TH_max).

(7) Action and effect

In an embodiment, the O-DU 110 may determine parameters (eg, TH_min, TH_max) for determining the reception timing of data in the intermediate device 130 , and transmit the determined parameters to the intermediate device 130 . According to this configuration, the intermediate device 130 can appropriately determine the data reception timing. Furthermore, it can be determined whether or not the installation position of the intermediate device 130 is appropriate.

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

In an embodiment, the parameters (eg, TH_min, TH_max) can be determined according to the capability information of the O-RU 120, or can be determined according to the delay time between the intermediate device 130 and the O-DU 110, or can be determined by the O-RU 120. The DU 110 is determined based on the delay time between the O-RU 120 and the intermediary 130 . According to this configuration, further appropriate parameters can be set.

In the embodiment, by introducing a new mechanism (for example, a counter shown in FIG. 9 ) in which the intermediate device 130 should determine the reception timing of data, it is possible to determine whether or not the installation position of the intermediate device 130 is appropriate.

[Modification 1]

Modification 1 of the embodiment will be described below. The difference from the embodiment will be mainly described below.

In the embodiment, the case where one O-RU 120 is provided on the air side of the intermediate device 130 is exemplified. On the other hand, in Modification 1, the case where two or more O-RUs 120 are provided on the air side of the intermediate device 130 will be described. The DL signal can be considered in the same way as the UL signal, so the UL signal will be described as an example here.

As shown in FIG. 11 , the O-RU 120X and the O-RU 120Y are provided on the air side of the intermediate device 130 . Here, the FH between the O-DU 110 and the intermediary 130 is referred to as FH1, the FH between the intermediary 130 and the O-RU 120X is referred to as FH2-1, and the FH between the intermediary 130 and the O-RU 120Y is referred to as FH2-1. The FH is called FH2-2. In FIG. 11, the case where the propagation delay of FH2-1 is larger than that of FH2-2 is exemplified.

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

Here, the O-DU 110 may determine TH_min with reference to the O-RU 120Y having a smaller propagation delay. The O-DU 110 may determine the TH_max based on the O-RU 120X with a larger propagation delay. Therefore, TH_min and TH_max can be expressed by the following equations.

TH_min=Ta3_min(O-RU 120Y)+T_FH2-2_min

TH_max=Ta4_max-T_FH1_max-T_Comb

Here, Ta4_max is the sum of Ta3_max (O-RU 120X) and T34_max (O-RU 120X). T34_max (O-RU 120X) is the total of T_FH2-1max, T_Comb (O-RU 120X), and T_FH1_max.

In addition, the idea of Modification 1 can also be applied to the case where three or more O-RUs 120 are provided on the air side of the intermediate device 130 . That is, TH_min is determined based on the O-RU 120 with the smallest propagation delay, and TH_max is determined based on the O-RU 120 with the largest propagation delay.

[Modification 2]

Modification 2 of the embodiment will be described below. The following mainly describes the differences between the embodiments.

In the embodiment, a case where one intermediary device 130 is provided between the O-DU 110 and the O-RU 120 is exemplified. On the other hand, in Modification 2, the case where two or more intermediate devices 130 are installed in series between the O-DU 110 and the O-RU 120 is illustrated. The DL signal can be considered in the same way as the UL signal, so the UL signal will be described as an example here.

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-DU 110 and the intermediate device 130P is referred to as FH1, the FH between the intermediate device 130P and the intermediate device 130Q is referred to as FH2, and the FH between the intermediate device 130Q and the O-RU 120X is referred to as FH1 FH3.

In this case, the O-DU 110 determines parameters (TH_min and TH_max) for the intermediate device 130P and the intermediate device 130Q, respectively. The parameters used in the intermediary 130P are referred to as TH(p)_min and TH(p)_max, and the parameters used in the intermediary 130Q are referred to as TH(q)_min and TH(q)_max. For example, these parameters can be represented by the following equations shown in FIG. 12 .

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 130P)-T_FH2_max-T_Comb(Intermediate 130Q)

In addition, the idea of Modification 2 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]

As mentioned above, although the content of this invention was demonstrated based on an Example, this invention is not limited to these descriptions, It is clear for those skilled in the art that various deformation|transformation and improvement are possible.

For example, in the above-described embodiment, TH_min and TH_max are used as names of parameters for determining the reception timing of data 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 reception window of the intermediate device 130, and may also be referred to as a parameter defining the start timing. Likewise, TH_max may be referred to as the end timing of the reception window of the intermediate device 130, and may also be referred to as a parameter defining the end timing. The term such as the reception window of the intermediate device 130 can be referred to as the waiting time of the intermediate device 130 when two or more O-RAs 130 are provided on the air side of the intermediate device 130 .

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

In the above-mentioned embodiment, as shown in FIG. 3B and FIG. 3C , as the intermediate device 130 , an example of applying FHM or O-RU (cascading connection) is shown alone, but it is also possible to have a composite configuration on the same FH. FHM and O-RU based on cascade connections.

In the above-mentioned embodiment, the configuration of the FH according to the O-RAN standard has been described, but the FH does not necessarily have to be according to the O-RAN standard. For example, at least a portion of the O-DU 110, the O-RU 120, and the intermediary 130 may conform to the FH standard specified in 3GPP.

The block diagrams ( FIGS. 5 and 6 ) used in the description of the above-described embodiments show blocks in units of functions. These functional blocks (structural parts) are realized by any combination of at least one of hardware and software. In addition, the realization method of each functional block is not specifically limited. That is, each functional block may be implemented by one device that is physically or logically combined, or two or more physically or logically separated devices may be connected directly or indirectly (for example, using wired, wireless, etc.) , using these multiple devices to achieve. The functional blocks can also be realized by combining software with the above-mentioned one means or a plurality of the above-mentioned means.

Judging, deciding, judging, calculating, calculating, processing, exporting, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, envisioning, expecting, viewing , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but not limited to these. For example, a functional block (configuration unit) that functions for transmission is called a transmitting unit or a transmitter. In short, as described above, the implementation method is not particularly limited.

In addition, the above-mentioned O-DU 110 and the intermediate device 130 (the device) can also function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 13 is a diagram showing an example of the hardware configuration of the apparatus. As shown in FIG. 13 , the device may be configured as a computer device including a processor 1001 , a memory 1002 (memory), a memory 1003 (storage), a communication device 1004 , an input device 1005 , an output device 1006 , a bus 1007 , and the like.

In addition, in the following description, the wording of "means" may be replaced by "circuit", "device", "unit" and the like. The hardware structure of the device may be configured to include one or more of the respective devices shown in the drawings, or may be configured to not include a part 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.

In addition, each function in the device is realized by the following method: reading predetermined software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs operations, and controls the communication of the communication device 1004 or controls the memory 1002. and at least one of reading and writing of data in the memory 1003 .

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.

Further, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and executes various processes accordingly. As the program, a program for causing the computer to execute at least a part of the operations described in the above-described embodiments is used. In addition, with regard to the above-described various processes, the above-described various processes have been described as being executed by one processor 1001 , but the above-described various processes may be executed simultaneously or sequentially by two or more processors 1001 . The processor 1001 may also be mounted on more than one chip. In addition, the program may also be sent from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and may be composed of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (Electrically Erasable Programmable ROM) : EEPROM), at least one of random access memory (Random Access Memory: RAM) and the like. Memory 1002 may also be referred to as registers, cache, main memory (main storage), and the like. The memory 1002 can store a program (program code), a software module, and the like capable of executing the method according to an embodiment of the present disclosure.

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

The communication device 1004 is hardware (transmitting device) for communicating between computers via at least one of a wired network and a wireless network, and may also be referred to as a network device, a network controller, a network card, a communication module, or the like, for example.

The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency division duplex, a frequency division duplex, a frequency division duplex, a frequency division duplex, a frequency division duplex, and a frequency division duplex (TDD). synthesizer, etc.

The input device 1005 is an input device (eg, a keyboard, a mouse, a microphone, a switch, a key, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (eg, a display, a speaker, an LED lamp, etc.) that implements output to the outside. In addition, the input device 1005 and the output device 1006 may be formed integrally (for example, a touch panel).

In addition, each device such as the processor 1001 and the memory 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.

In addition, the apparatus may be configured to include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable A gate array (FieldProgrammable Gate Array: FPGA) and other hardware can also be used to implement a part or all of each functional block through the hardware. For example, the processor 1001 may also be installed using at least one of these hardwares.

Furthermore, the notification of information is not limited to the form/implementation described in this disclosure, and other methods may be used. For example, the notification of information may be performed through physical layer signaling (eg, Downlink Control Information (DCI), Uplink Control Information (UCI)), higher 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 are implemented. , the RRC signaling may also be referred to as an RRC message, for example, may also be an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, and the like.

The various forms/embodiments described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, and 4th generation mobile communication systems (4th generation mobile communication systems). communication system: 4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand) ), Bluetooth (registered trademark), systems using other suitable systems, and next-generation systems extended accordingly. In addition, a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) may be used.

Regarding the processing procedures, sequences, and flows of the various forms/embodiments described in the present disclosure, the order may be changed unless they are inconsistent. For example, for the methods described in this disclosure, elements of the various steps are presented using the illustrated order, but are not limited to the particular order presented.

In the present disclosure, the specific operation performed by the base station may be performed by its upper node depending on the situation. In a network consisting of one or more network nodes with base stations, various actions for communicating with terminals may be performed by the base station and other network nodes other than the base station (for example, consider MME or S- GW, etc., but not limited to at least one of these), it is obvious. In the above, the case where the other network node other than the base station is one is exemplified, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals (information, etc.) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It is also possible to input or output via multiple network nodes.

The input or output information can be stored in a specific location (eg, memory) or managed using a management table. Input or output information can be rewritten, updated or written down. The output information can also be deleted. The entered information can also be sent to other devices.

The determination can be performed by a value (0 or 1) represented by 1 bit, by a Boolean value (Boolean: true or false), or by a comparison of numerical values (for example, a comparison with a predetermined value).

Each form/embodiment described in the present disclosure may be used alone or in combination, and may be switched for use according to implementation. In addition, the notification of the reservation information is not limited to be performed explicitly (eg, notification of "Yes X"), and may be performed implicitly (eg, without notification of the reservation information).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, should be construed broadly to mean commands, command sets, codes, code segments, program code, programs (program), subprogram, software module, application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Also, software, commands, information, and the like can be transceived via a transmission medium. For example, using at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.) or other remote sources sending software, 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 also be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, codes that may be referred to in the foregoing description as a whole may be represented by voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical fields or photons, or any combination of these Element (symbol), chip (chip), etc.

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

As used in this disclosure, the terms "system" and "network" are used interchangeably.

In addition, the information, parameters, and the like described in the present disclosure may be expressed using absolute values, may also be expressed using relative values with predetermined values, and may also be expressed using corresponding other information. For example, radio resources can also be indicated by an index.

The names used for the above parameters are in no way limiting. Furthermore, the numerical expression etc. using these parameters may differ from the content which is explicitly disclosed in this disclosure. Various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by appropriate names, so the various names assigned to these various channels and information elements are in any way irrelevant. restrictive.

In this disclosure, "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point" (access point)", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " The terms "carrier", "component carrier" and the like are used interchangeably. Base stations are also sometimes referred to as macro cells, small cells, femto cells, pico cells, and the like.

A base station can accommodate one or more (eg, 3) cells (also referred to as sectors). When the base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be passed through the base station subsystem (for example, an indoor small base station (Remote Radio Head (Remote Radio Head). Radio Head): RRH) provides communication services.

The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of a base station and a base station subsystem that perform communication services within the coverage area.

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

For mobile stations, those skilled in the art also sometimes use the following terms: 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, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a communication device, or the like. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, a car, an airplane, etc.), a moving body (eg, an unmanned aerial vehicle, an autonomous vehicle, etc.) that moves in an unmanned manner, or a robot (human or unmanned) human type). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same applies hereinafter). For example, the communication between the base station and the mobile station is replaced by the communication between a plurality of mobile stations (for example, it can also be referred to as D2D (Device-to-Device: device-to-device), V2X (Vehicle-to-Everything: It is also possible to apply the various forms/embodiments of the present disclosure to the structure from the vehicle to any system, etc. In this case, the mobile station may have a structure that has the functions of the base station. In addition, "uplink" and "downlink" etc. may also be replaced with words corresponding to inter-terminal communication (eg, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

Likewise, mobile stations in the present disclosure may be replaced by base stations. In this case, the base station may be configured to have functions that the mobile station has.

A radio frame may consist of one or more frames in the time domain. In the time domain, one or more of each frame may be referred to as a subframe.

A subframe may consist of one or more slots in the time domain. A subframe may be a fixed length of time (eg, 1 ms) independent of a parameter set (numerology).

A parameter set may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The parameter set may represent, for example, subcarrier spacing (SubCarrier Spacing: SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, radio frame structure, transceiver in At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.

A time slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing: OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols in the time domain etc.) composition. A time slot may be a unit of time based on a parameter set.

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

Radio frames, subframes, slots, mini-slots, and symbols all represent time units when a signal is transmitted. Radio frames, subframes, time slots, mini-slots, and symbols may be respectively referred to by other corresponding names.

For example, 1 subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as TTI, and 1 slot or 1 mini-slot may also be referred to as TTI. That is, at least one of the subframe and the TTI may be a subframe (1ms) in the conventional LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms . In addition, the unit representing the TTI may not be a subframe but a slot, a mini-slot, or the like.

Here, the TTI refers to, for example, the smallest time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal in units of TTIs. In addition, the definition of TTI is not limited to this.

TTI may be a transmission time unit of channel-coded data packets (transport blocks), code blocks, code words, etc., or may be a processing unit such as scheduling and link adaptation. In addition, when a TTI is assigned, the time interval (eg, the number of symbols) in which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

In addition, where 1 slot or 1 minislot is referred to as a TTI, more than one TTI (ie, more than one slot or more than one minislot) may constitute the minimum time unit for scheduling. In addition, the number of time slots (minislot number) constituting the smallest time unit of the schedule can be controlled.

TTI with a time length of 1 ms is also called normal TTI (TTI in LTE Rel. 8-12), normal TTI (normal TTI), long TTI (long TTI), normal subframe, normal subframe (normal subframe) , long (long) subframe, time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI (short TTI), a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a time slot, etc. .

In addition, for long TTI (eg, normal TTI, subframe, etc.), it can be replaced with a TTI with a time length exceeding 1 ms, and for short TTI (short TTI) (eg, shortened TTI, etc.), you can use Replace with a TTI length smaller than a long TTI (longTTI) and a TTI length TTI with a TTI length greater than 1 ms.

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 (subcarriers). The number of subcarriers included in the RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in the RB may also be determined according to the parameter set.

In addition, the time domain of the RB may include one or more symbols, which may be 1 slot, 1 mini-slot, 1 subframe, or 1 TTI in length. 1 TTI, 1 subframe, etc. may be constituted by one or more resource blocks, respectively.

In addition, one or more RBs may be referred to as physical resource blocks (Physical RB: PRB), sub-carrier group (Sub-Carrier Group: SCG), resource element group (Resource Element Group: REG), PRB pair, RB pair, and the like.

Also, a resource block may be composed of one or more resource elements (Resource Element: RE). For example, 1RE may be a radio resource region of 1 subcarrier and 1 symbol.

A bandwidth part (Bandwidth Part: BWP) (also referred to as a partial bandwidth, etc.) represents a subset of continuous common resource blocks (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RB can be determined by the index of the RB based on the common reference point of the carrier. PRBs are defined in a BWP and numbered within that BWP.

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

At least one of the set BWPs may be active, and it may not be assumed that the UE transmits and receives predetermined signals/channels outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

The above-mentioned structures of radio frames, subframes, slots, mini-slots, symbols, etc. are only examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained in a slot, the symbols contained in a slot or minislot, and The number of RBs, the number of subcarriers included in the RB, the number of symbols in the TTI, the symbol length, and the cyclic prefix (Cyclic Prefix: CP) length can be variously changed.

The terms "connected", "coupled" or all variations of these terms are intended to mean any direct or indirect connection or combination between two or more elements, which may be included in the mutual " A case where there are one or more intervening elements between two elements that are "connected" or "joined". The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "connection" may be replaced by "access". As used in the present disclosure, for two elements, it may be considered that by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples by using having The electromagnetic energy of the wavelengths of the radio frequency domain, the microwave domain and the light (both visible and invisible) domains can be "connected" or "combined" with each other.

The reference signal may be referred to as Reference Signal (RS) for short, and may also be referred to as Pilot (Pilot) according to the applied standard.

The description of "based on" used in the present disclosure does not mean "only based on" unless it is clearly stated otherwise. In other words, the description of "based on" means both "based only on" and "based on at least".

The "unit" in the structure of each device described above may be replaced by a "section", a "circuit", a "device", or the like.

Any reference to an element using the terms "first", "second", etc. used in this disclosure is not intended to limit the number and order of those elements. These terms are used in this disclosure as a convenient way of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements can be taken here or that the first element must precede the second element in any form.

Where "include," "including," and variations thereof are used in this disclosure, these terms are meant to be inclusive as well as the term "comprising." Also, the term "or" used in this disclosure means not an exclusive-or.

In the present disclosure, for example, such as a, an, and the in English, when articles are added by translation, the present disclosure also includes the case where the nouns following these articles are plural.

Terms such as "determining" and "determining" used in the present disclosure may include various operations. "Judging" and "determining" may include, for example, that judging, calculating, computing, processing, deriving, investigating, looking up (for example, , searches in tables, databases, or other data structures), ascertaining matters are deemed to have been "judged", "determined" matters, etc. In addition, "judging" and "determining" may include receiving (eg, receiving information), transmitting (eg, sending information), input (input), output (output), accessing (accessing) ) (for example, accessing data in memory) is regarded as a matter of "judgment", "decision", etc. In addition, "judgment" and "decision" may include that matters that have been resolved, selected, chosen, established, compared, etc. are regarded as "judgment", "decision", etc. " matter. In other words, "judgment" and "determination" may include "judgment" and "determination" of any action. In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

In the present disclosure, the phrase "A and B are different" may also mean "A and B are different from each other". In addition, this term may also mean that "A and B are different from C, respectively." Terms such as "separation" and "combination" are also interpreted in the same manner as "different".

The present disclosure has been described in detail above, but it should be 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 can be implemented as modified and changed modes without departing from the spirit and scope of the present disclosure defined by the claims. Therefore, the description of the present disclosure is for the purpose of illustration and does not have any limiting meaning to the present disclosure.

Label description:

10 Wireless Communication Systems

20 NG-RAN

100 gNB

110 O-DU

111 Communications Department

113 Acquisition Department

115 Parameter control section

117 Parameter notification department

120 O-RU

130 Intermediate device (FHM)

130A O-RU

131 Communications Department

133 Processing time notification department

135 Parameter acquisition section

137 Parameter setting section

200UE

1001 processor

1002 memory

1003 memory

1004 Communication device

1005 Input device

1006 Output device

1007 bus

Claims (5)

1. A communication apparatus constituting a1 st base station provided on a preamble, comprising:

a control unit that determines a parameter used for determining a reception timing of data by an intermediate device provided in the preamble; and

a transmitting unit that transmits the parameter to the intermediate device.

2. The communication device of claim 1,

the control unit determines a parameter to be set for the intermediate device based on a processing time in the intermediate device.

3. The communication device of claim 1,

the control unit determines the parameter based on capability information of the 2 nd base station provided in the preamble.

4. The communication device of claim 1 or 2,

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 2 nd base station and the intermediate device.

5. A communication apparatus constituting an intermediate apparatus provided on a fronthaul, wherein the communication apparatus has:

a control unit that executes control for determining a reception timing of data in the intermediate device; and

and a receiving unit configured to receive a parameter used for determining the reception timing from the 1 st base station provided in the preamble.

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