WO2022108393A1 - 프론트홀 인터페이스를 사용하는 통신을 위한 방법 및 장치 - Google Patents
프론트홀 인터페이스를 사용하는 통신을 위한 방법 및 장치 Download PDFInfo
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- WO2022108393A1 WO2022108393A1 PCT/KR2021/017105 KR2021017105W WO2022108393A1 WO 2022108393 A1 WO2022108393 A1 WO 2022108393A1 KR 2021017105 W KR2021017105 W KR 2021017105W WO 2022108393 A1 WO2022108393 A1 WO 2022108393A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
Definitions
- the present invention relates to a communication technology in a communication system including a fronthaul interface, and more particularly, to a technology for efficiently transmitting and receiving parameters for performance management of a communication system.
- LTE long term evolution
- NR new radio
- 3GPP 3rd generation partnership project
- a frequency band of a 4G communication system eg, a frequency band of 6 GHz or less
- a 5G communication system eg, a communication system supporting NR
- the 5G communication system may support enhanced Mobile BroadBand (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and Massive Machine Type Communication (mMTC).
- eMBB enhanced Mobile BroadBand
- URLLC Ultra-Reliable and Low Latency Communication
- mMTC Massive Machine Type Communication
- the O-RAN (open-radio access network) alliance defines a fronthaul (fronthaul) interface.
- the fronthaul interface may be an interface between an O-RAN distributed unit (O-DU) constituting a base station (eg, eNB, gNB) and an O-RAN radio unit (O-RU).
- the O-DU may be referred to as a lower layer split-central unit (LLS-CU), and the O-RU may be referred to as a lower layer split-distributed unit (LLS-DU).
- LLS-CU and LLS-DU may be terms used in 3rd generation partnership project (3GPP).
- 3GPP 3rd generation partnership project
- An object of the present invention to solve the above problems is to provide a method and apparatus for transmitting and receiving parameters for performance management in a communication system including a fronthaul interface.
- the O-RU operation method provides a plurality of first measurement results by performing a measurement operation on a first measurement target in one notification interval according to the notification interval. generating, generating a first measurement result list including the plurality of first measurement results, and transmitting a message including the first measurement result list to the O-DU.
- the method of operating the O-RU may further include generating a first notification including a most recent measurement result among the plurality of first measurement results, wherein the message may further include a first notification.
- the first measurement result list may be decoded in the O-DU supporting a version after a specific version of the O-RAN, and the first notification is decoded in the O-DU supporting a version before the specific version.
- the method of operating the O-RU includes generating a plurality of second measurement results by performing a measurement operation on a second measurement target in the one notification period, and a second including the plurality of second measurement results.
- the method may further include generating a measurement result list, and the message may further include the second measurement result list.
- the first measurement result list may further include measurement start time information and measurement end time information for each of the plurality of first measurement results.
- the plurality of first measurement results may be arranged in an ascending order of measurement time in the first measurement result list.
- the first measurement result list may further include at least one of information indicating the number of the plurality of first measurement results and a sequence number of each of the plurality of first measurement results.
- the notification interval may be set by the O-DU to be longer than a measurement interval in which one measurement operation is performed.
- the first measurement target may be a transceiver, a reception window, a transmission measurement, an EPE, or a symbol RSSI.
- an O-RU operation method generates a first measurement result by performing a measurement operation on a first measurement target in one notification interval according to a notification interval. step, generating a first notification including the first measurement result, generating a first measurement result list including the first measurement result, and including the first notification and the first measurement result list and transmitting a message to the O-DU.
- the first measurement result list may be decoded in the O-DU supporting a version after a specific version of the O-RAN, and the first notification is decoded in the O-DU supporting a version before the specific version.
- the notification interval may be set by the O-DU to be the same as a measurement interval at which one measurement operation is performed.
- the method of operation of the O-RU includes generating a second measurement result by performing a measurement operation on a second measurement target in the one notification period, and generating a second notification including the second measurement result. and generating a second measurement result list including the second measurement result, and the message may further include the second notification and the second measurement result list.
- a method of operating an O-DU according to a third embodiment of the present invention for achieving the above object includes the steps of setting a notification interval and a measurement interval for the O-RU, and a plurality of first measurement results for a first measurement target receiving, from the O-RU, a message including a first measurement result list including The first measurement results are measured in one notification interval according to the notification interval.
- the message may further include a first notification including a most recent measurement result among the plurality of first measurement results.
- the first measurement result list may be decoded in the O-DU supporting a version after a specific version of the O-RAN, and the first notification is decoded in another O-DU supporting a version before the specific version.
- the first measurement result list may further include measurement start time information and measurement end time information for each of the plurality of first measurement results.
- the plurality of first measurement results may be arranged in an ascending order of measurement time in the first measurement result list.
- the first measurement result list may further include at least one of information indicating the number of the plurality of first measurement results and a sequence number of each of the plurality of first measurement results.
- the first measurement target may be a transceiver, a reception window, a transmission measurement, an EPE, or a symbol RSSI.
- various parameters for performance management can be efficiently transmitted/received between an open-radio access network (O-RAN) radio unit (O-RU) and an O-RAN distributed unit (O-DU).
- O-RAN open-radio access network
- O-RU radio unit
- O-DU O-RAN distributed unit
- a plurality of measurement results eg, a plurality of measurement results for each measurement object
- This operation may not affect the function of the existing M-Plane. Accordingly, the performance of a communication system including a fronthaul interface may be improved.
- FIG. 1 is a conceptual diagram illustrating a first embodiment of a communication system.
- FIG. 2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
- FIG. 3 is a block diagram illustrating a first embodiment of a base station supporting LLS in a communication system.
- FIG. 4 is a block diagram illustrating a first embodiment of an interface structure between an O-DU and an O-RU in a communication system.
- 5A is a block diagram illustrating a first embodiment of a hierarchical M-Plane model.
- 5B is a block diagram illustrating a second embodiment of a hybrid M-Plane model.
- FIG. 6 is a block diagram illustrating a first embodiment of a protocol stack of M-Plane.
- FIG. 7 is a conceptual diagram illustrating a first embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- FIG. 8 is a conceptual diagram illustrating a second embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- FIG. 9 is a conceptual diagram illustrating a third embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- FIG. 10 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for a transceiver in a YANG model using method A;
- FIG. 11 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for a reception window in a YANG model using method A.
- FIG. 12 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for EPE in a YANG model using method A.
- FIG. 12 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for EPE in a YANG model using method A.
- FIG. 13 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for transmission measurement in a YANG model using method A.
- FIG. 14 is a conceptual diagram illustrating a structure of an extended measurement result for symbol RSSI in a YANG model using method A according to a first embodiment.
- first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.
- the term “and/or” includes a combination of a plurality of related listed items or any of a plurality of related listed items.
- “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B”. Also, in the embodiments of the present application, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B”.
- the communication system may be a 4G communication system (eg, a long-term evolution (LTE) communication system, an LTE-A communication system), a 5G communication system (eg, a new radio (NR) communication system), and the like.
- the 4G communication system may support communication in a frequency band of 6 GHz or less
- the 5G communication system may support communication in a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less.
- the communication system to which the embodiments according to the present invention are applied is not limited to the content described below, and the embodiments according to the present invention can be applied to various communication systems.
- the communication system may be used in the same meaning as the communication network (network), and "LTE” may indicate “4G communication system”, “LTE communication system” or “LTE-A communication system”, and “NR” may indicate “5G communication system” or “NR communication system”.
- FIG. 1 is a conceptual diagram illustrating a first embodiment of a communication system.
- the communication system 100 is a plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6).
- the communication system 100 is a core network (core network) (eg, S-GW (serving-gateway), P-GW (packet data network (PDN)-gateway), MME (mobility management entity)) may include more.
- core network eg, S-GW (serving-gateway), P-GW (packet data network (PDN)-gateway), MME (mobility management entity)
- the core network is an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.
- AMF access and mobility management function
- UPF user plane function
- SMF session management function
- SMS session management function
- the plurality of communication nodes 110 to 130 may support a communication protocol (eg, an LTE communication protocol, an LTE-A communication protocol, an NR communication protocol, etc.) defined in a 3rd generation partnership project (3GPP) standard.
- a plurality of communication nodes 110 to 130 are CDMA (code division multiple access) technology, WCDMA (wideband CDMA) technology, TDMA (time division multiple access) technology, FDMA (frequency division multiple access) technology, OFDM (orthogonal frequency division) technology multiplexing) technology, Filtered OFDM technology, CP (cyclic prefix)-OFDM technology, DFT-s-OFDM (discrete Fourier transform-spread-OFDM) technology, OFDMA (orthogonal frequency division multiple access) technology, SC (single carrier)-FDMA Technology, Non-orthogonal Multiple Access (NOMA) technology, GFDM (generalized frequency division multiplexing) technology, FBMC (filter bank multi-carrier) technology, UFMC (universal filtered multi
- FIG. 2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
- the communication node 200 may include at least one processor 210 , a memory 220 , and a transceiver 230 connected to a network to perform communication.
- the communication node 200 may further include an input interface device 240 , an output interface device 250 , a storage device 260 , and the like.
- Each of the components included in the communication node 200 may be connected by a bus 270 to communicate with each other.
- the processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260 .
- the processor 210 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed.
- Each of the memory 220 and the storage device 260 may be configured as at least one of a volatile storage medium and a non-volatile storage medium.
- the memory 220 may be configured as at least one of a read only memory (ROM) and a random access memory (RAM).
- the communication system 100 includes a plurality of base stations 110 - 1 , 110 - 2 , 110 - 3 , 120 - 1 and 120 - 2 , and a plurality of terminals 130 - 1, 130-2, 130-3, 130-4, 130-5, 130-6).
- Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell.
- Each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell.
- the fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1.
- the second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2.
- the fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5, and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3.
- the first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1.
- the sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.
- each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is a NodeB (NB), an evolved NodeB (eNB), gNB, an advanced base station (ABS), HR - BS (high reliability-base station), BTS (base transceiver station), radio base station (radio base station), radio transceiver (radio transceiver), access point (access point), access node (node), RAS (radio access station) ), MMR-BS (mobile multihop relay-base station), RS (relay station), ARS (advanced relay station), HR-RS (high reliability-relay station), HNB (home NodeB), HeNB (home eNodeB), RSU (road side unit), RRH (radio remote head), TP (transmission point), TRP (transmission and reception point), macro (macro) cell, pico (pico) cell, micro (micro) cell, femto (femto) It may be referred to as
- Each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 includes a user equipment (UE), a terminal equipment (TE), an advanced mobile station (AMS), HR-MS (high reliability-mobile station), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, portable It may be referred to as a portable subscriber station, a node, a device, an on board unit (OBU), and the like.
- UE user equipment
- TE terminal equipment
- AMS advanced mobile station
- HR-MS high reliability-mobile station
- OBU on board unit
- a base station may support a fronthaul interface.
- the fronthaul interface may be a fronthaul interface defined in an open-radio access network (O-RAN) alliance.
- the base station may include an O-RAN distributed unit (O-DU) and one or more O-RAN radio units (O-RU). Communication between the O-DU and one or more O-RUs may be performed through a fronthaul interface.
- the O-DU may be a lower layer split-central unit (LLS-CU) specified in 3GPP
- the O-RU may be a lower layer split-distributed unit (LLS-DU) specified in 3GPP.
- Each of the O-DU and O-RU may be configured the same as or similar to the communication node 200 shown in FIG. 2 .
- a corresponding second communication node is a method (eg, a method corresponding to the method performed in the first communication node) For example, reception or transmission of a signal) may be performed. That is, when the operation of the O-DU is described, the corresponding O-RU may perform the operation corresponding to the operation of the O-DU. Conversely, when the operation of the O-RU is described, the corresponding O-DU may perform the operation corresponding to the operation of the O-RU.
- FIG. 3 is a block diagram illustrating a first embodiment of a base station supporting lower layer split (LLS) in a communication system.
- LLC lower layer split
- the base station 300 may include an O-DU 311 , an O-RU #1 321 , an O-RU #2 322 , and the like.
- the base station 300 may include a plurality of O-RUs. Communication between the O-DU 311 and the O-RUs 321 and 322 may be performed through a fronthaul interface.
- the fronthaul interface may include an LLS-control plane and an LLS-user plane.
- the LLS-control plane may be referred to as “LLS-C” or “LLS-C-Plane” and the LLS-user plane may be referred to as “LLS-U” or “LLS-U-Plane”.
- the O-DU 311 may be a logical node that performs a radio link control (RLC) layer function, a medium access control (MAC) layer function, and/or a high-PHY (physical) layer function. have.
- the O-DU 311 may control the plurality of O-RUs 321 and 322 .
- Each of the O-RUs 321 and 322 may be a logical node that performs a low-PHY layer function and/or a radio frequency (RF) processing function.
- the O-RUs 321 and 322 may transmit/receive control information and/or data by performing communication with the O-DU 311 .
- the control information may be real-time control information.
- the data may be user plane data.
- the O-RUs 321 and 322 may operate based on the control of the O-DU 311 .
- FIG. 4 is a block diagram illustrating a first embodiment of an interface structure between an O-DU and an O-RU in a communication system.
- each of the O-DU and O-RU may include a CUS-Plane (eg, O-RAN CUS-Plane), and may perform communication according to a CUS-Plane function.
- each of the O-DU and O-RU may include an M (management)-Plane (eg, O-RAN M-Plane), and may perform communication according to an M-Plane function. That is, the O-DU and O-RU may perform the M-Plane function as well as the CUS-Plane function.
- the M-Plane function may support initialization, configuration, management, etc. of O-RU.
- M-Plane may use an open interface based on the NETCONF and/or YANG model (hereinafter referred to as the "NETCONF/YANG model"). M-Plane supports start up installation, software management, configuration management, performance management, fault management, file management, etc. can
- the M-Plane structure in O-RAN may be as follows.
- FIG. 5A is a block diagram illustrating a first embodiment of a hierarchical M-Plane model
- FIG. 5B is a block diagram illustrating a second embodiment of a hybrid M-Plane model.
- an O-RU may be managed by one or more O-DUs.
- a NETCONF-based M-Plane interface may be used between the O-DU and the O-RU.
- An interface between the O-DU and a network management system (NMS) may exist, but the NMS may not directly manage the O-RU. That is, the NMS may manage the O-RU through the O-DU.
- a direct interface between the O-RU and the NMS may not exist.
- the NMS may refer to the management system shown in FIG. 4 .
- the hybrid M-Plane model there may be a direct logical interface between the NMS and the O-RU as well as a logical interface between the O-DU and the O-RU.
- the NMS may support a software management function, a performance management function, a configuration management function, and/or a fault management function for the O-RU.
- the NMS and the O-RU may have end-to-end internet protocol (IP) layer connectivity.
- IP internet protocol
- FIG. 6 is a block diagram illustrating a first embodiment of a protocol stack of M-Plane.
- the IP transport layer may operate above the transport network layer.
- a transmission control protocol (TCP)/secure shell (SSH) layer may be used to transmit/receive an M-Plane message between the O-DU/NMS and the O-RU.
- TCP transmission control protocol
- SSH secure shell
- the NETCONF/YANG model may be used as a network element management protocol and a data modeling language.
- the NETCONF/YANG model can support an open management method for efficient integration and management between multi-vendor O-RU/O-DUs.
- NETCONF may obtain configuration state information and may support a configuration change operation.
- NETCONF can deliver a message in XML-RPC format on a transport layer (eg, SSH layer) that provides a secure transport.
- a transport layer eg, SSH layer
- Each of the get and get-config RPC operations may be used to obtain all of the settings, part of the settings, all of the state data, and/or part of the state data.
- Edit-config operations may be used to change, add, and/or delete configuration elements in a configuration data store.
- Notification support in NETCONF may be based on an event stream.
- a NETCONF client eg, O-DU
- O-DU may wish to receive notifications for certain events.
- a create-subscription operation may be used.
- the performance management function may be the main function of M-Plane.
- the performance management function may be a function for optimizing O-RU operation.
- O-DU eg, NETCONF client
- O-RU operation-related information eg, transceiver, receive window (rx-window), transmit window (tx-window)
- EPE energy, power, environmental
- RSSI received signal strength indicator
- the O-DU may collect configuration and/or status information for performance management.
- Measurement objects defined and/or used in the O-RAN specification for performance management are 5 or more measurement groups (eg, transceiver-statistics stats) group, reception window statistics (rx-window-stats) group, transmission measurement statistics (tx-measurement-stats) group, EPE statistics (epe-stats) group, RSSI statistics (rssi-stats) group, etc.) and/or managed.
- the RSSI statistics group may be a symbolic RSSI statistics group.
- a measurement-interval may be independently set for each measurement group. For example, the measurement interval may be different for each measurement group.
- Transceiver measurement interval (transceiver-measurement-interval), receive window measurement interval (rx-window-measurement-interval), transmit measurement interval (tx-measurement-interval), EPE measurement interval (epe-measurement interval), and / or RSSI
- the measurement interval (rssi-measurement-interval) may be set independently of each other.
- the measurement result (eg, measurement value) measured in the O-RU is transmitted using the NETCONF notification mechanism at the time according to the notification interval.
- the O-RU may periodically transmit a measurement result to the O-DU.
- the O-RU may store the measurement result for each measurement time in the local disk, and may upload the measurement result to the O-DU at a point in time according to the file-upload-interval.
- the notification interval may be set differently from the measurement interval.
- the measurement interval may mean a measurement interval
- the notification interval may mean a notification interval
- "transmission/reception operation of notification” may mean "transmission/reception operation of notification message”.
- the measurement interval of the measurement object #A may be set to 3 minutes, and the measurement interval of the measurement object #B may be set to 5 minutes.
- the notification interval may be set to 15 minutes.
- sending one notification eg, a notification message
- a plurality of measurement results may exist in the O-RU at the time of transmission of the notification.
- a plurality of measurement results for a specific measurement object may be included in one notification.
- the existing YANG model defined in the M-Plane of the O-RAN may not support the transmission/reception operation of one notification including a plurality of measurement results.
- the "transmission/reception operation of one notification including a plurality of measurement results” may be referred to as a "multi-measurement result reporting function". That is, the existing YANG model can transmit one notification including one measurement result for each measurement object. Therefore, if the notification interval is set longer than the measurement interval of the measurement target, a notification including only one measurement result may be transmitted, and the remaining measurement result(s) in the notification interval are O-DU (eg, NETCONF client) cannot be transmitted to Methods for solving the above-mentioned problems will be described below.
- O-DU eg, NETCONF client
- O-RAN M-Plane Regarding performance management in the M-Plane of O-RAN (hereinafter referred to as "O-RAN M-Plane"), the interface and configuration information between O-DU and O-RU is o-ran-performance-management.yang It can be defined in a module.
- "format for management information transmitted and received between devices” and “transmission procedure for management information” may be defined using the NETCONF/YANG model.
- Table 1 and Table 2 below main parameters used for performance management in the o-ran-performance-management.yang module may be defined. According to the update of the O-RAN specification, other parameters may be added to Tables 1 and 2, and the parameter(s) defined in Tables 1 and 2 may be changed.
- O-DU (eg, NETCONF client) is a measurement target, a value included in report-info (eg, maximum value, minimum value, count, etc.), object-unit, measurement You can set an interval, a notification interval, and/or a file upload interval.
- the O-DU may inform the O-RU of configuration information.
- the O-RU may perform measurement at a set measurement interval for the selected measurement target according to information (eg, value) set by the O-DU, and includes the measurement result according to the set notification interval or file upload interval. You can send a notification or upload a measurement result file.
- a measurement interval for a measurement target may be set for each measurement group.
- each of the transceiver measurement interval, the reception window measurement interval, the transmission measurement interval, the EPE measurement interval, and the RSSI measurement interval may be set independently of each other.
- the O-DU may set the information element(s) included in the report information for each measurement object.
- the reporting information may include a plurality of information elements.
- the information element(s) may include MAXIMUM, MINIMUM, FIRST, LATEST, and/or FREQUENCY_TABLE.
- a target unit may be independently set for each measurement target.
- the target unit may be different for each measurement target.
- FIG. 7 is a conceptual diagram illustrating a first embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- the O-RU may store measurement results for measurement objects belonging to each of the transceiver statistics group and the reception window statistics group in a data store based on the YANG model.
- the O-RU may send a NETCONF notification including the measurement result(s) to the O-DU (eg, NETCONF client).
- the transceiver statistics group may be referred to as transceiver measurement objects
- the receive window statistics group may be referred to as receive window measurement objects. Active for each measurement target may be set to true or false. A default of activation for each measurement target may be false.
- the count value may start from 0 at the boundary of the measurement interval.
- FIG. 8 is a conceptual diagram illustrating a second embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- the O-RU may store measurement results for measurement objects belonging to each of the EPE statistics group and the transmission measurement statistics group in a data store based on the YANG model.
- the O-RU may send a NETCONF notification including the measurement result(s) to the O-DU (eg, NETCONF client).
- the EPE statistics group may be referred to as EPE measurement objects
- the transmission measurement statistics group may be referred to as transmission measurement objects.
- Activation for each measurement target may be set to true or false. A default of activation for each measurement object may be false.
- FIG. 9 is a conceptual diagram illustrating a third embodiment of a data structure of a YANG model for delivery of a performance measurement result in an O-RAN M-Plane.
- measurement group(s) for various measurement results eg, measurement information
- symbol RSSI statistics symbol-rssi-stats
- RSSI for specific symbols in the time domain The above-described measurement information may have the same or similar structure to the structure shown in FIG. 7 or FIG. 8 .
- the structure of the symbol RSSI statistics may be the same as or similar to the structure of the transceiver statistics.
- the O-RU may perform a measurement operation according to a measurement interval set by the O-DU (eg, NETCONF client).
- the O-RU may periodically transmit the measurement result(s) to the O-DU using the NETCONF notification mechanism at a time point according to the notification interval.
- the O-RU may store the measurement result(s) in the local disk for each measurement time, and may upload the measurement result(s) to the O-DU at a point in time according to the file upload interval.
- the notification interval may be set differently from the measurement interval.
- the measurement interval of the measurement object #A may be set to 3 minutes, and the measurement interval of the measurement object #B may be set to 5 minutes.
- the notification interval may be set to 15 minutes.
- sending one notification eg, a notification message
- a plurality of measurement results may exist in the O-RU at the time of transmission of the notification.
- a plurality of measurement results for a measurement target may be included in one notification.
- the existing YANG model defined in the M-Plane of O-RAN may not support the transmission operation of one notification including a plurality of measurement results. That is, the existing YANG model can transmit one notification including one measurement result for each measurement object. Therefore, if the notification interval is set longer than the measurement interval of the measurement target, a notification including only one measurement result may be transmitted, and the remaining measurement result(s) in the notification interval are O-DU (eg, NETCONF client) cannot be transmitted to That is, in the YANG model of the current O-RAN (eg, the YANG model shown in FIGS. 7 and 8), the transmission operation of one notification may be performed to transmit one measurement result for each measurement target. have.
- O-DU eg, NETCONF client
- Part 1 (eg, common configuration part) of the YANG model for performance management of the O-RAN M-Plane may be as follows.
- Part 1 of the above-described YANG model may define parameters commonly applied to all measurement objects.
- part 1 of the YANG model includes measurement target information supported by O-RU, measurement interval by measurement group (eg, transceiver measurement interval, receive window measurement interval, transmit measurement interval, EPE measurement interval, RSSI measurement interval). ), notification interval, and/or file upload interval.
- the transceiver measurement interval, the reception window measurement interval, the transmission measurement interval, the EPE measurement interval, and the RSSI measurement interval may be set differently.
- the notification interval or file upload interval can be set to one common value. Each of the notification interval or the file upload interval may be set differently from the transceiver measurement interval, the receive window measurement interval, the transmission measurement interval, the EPE measurement interval, and/or the RSSI measurement interval.
- Part 2 eg, transceiver, reception window related notification
- Part 2 eg, transceiver, reception window related notification
- Part 3 eg, EPE, transmission window related notification
- Part 3 eg, EPE, transmission window related notification
- Portions 2 and 3 of the YANG model may be a YANG model defined for transmitting measurement information related to a transceiver, a receive window, an EPE, and/or a transmit window in the form of a NETCONF notification.
- Transceiver statistics, receive window statistics, transmit statistics, EPE statistics, and RSSI statistics each represent one result (eg, For example, a value) may be included.
- results measured in a plurality of time intervals may not be transmitted using one notification.
- the notification including the measurement result must be transmitted frequently.
- the YANG model to solve this problem can be set as follows.
- an additional measurement list including one or more measurement results for each measurement object may be set, and the additional measurement list may be added to statistical information of the corresponding measurement object. For example, an additional measurement list may be added to the statistical information in chronological order.
- FIG. 10 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for a transceiver in a YANG model using method A;
- an additional transceiver measurement result (additional-transceiver-measurement-result) for each measurement target (eg, RX_POWER, TX_POWER, TX_BIAS_COUNT, TEMPARATURE, etc.) may be added.
- FIG. 11 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for a reception window in a YANG model using method A.
- an additional reception window measurement result (additional-rx-window-measurement-result) for each measurement target (eg, RX_ON_TIME, RX_EARLY, RX_LATE, RX_CORRUT, RX_DUPL, RX_TOTAL, etc.) may be added. .
- FIG. 12 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for EPE in a YANG model using method A.
- FIG. 12 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for EPE in a YANG model using method A.
- an additional EPE measurement result (additional-epe-measurement-result) for each measurement target (eg, TEMPARATURE, POWER) may be added.
- FIG. 13 is a conceptual diagram illustrating a first embodiment of the structure of an extended measurement result for transmission measurement in a YANG model using method A.
- an additional transmission measurement result (additional-tx-measurement-result) for each measurement target (eg, TX_TOTAL, TX_TOTAL_C) may be added.
- FIG. 14 is a conceptual diagram illustrating a structure of an extended measurement result for symbol RSSI in a YANG model using method A according to a first embodiment.
- an additional symbol RSSI measurement result (additional-symbol-rssi-measurement-result) for each measurement target (eg, ALL-UL-SYMBOLS, CONFIGURED-SYMBOLS) may be added.
- the structure of the YANG model according to method 1 described above may be defined as follows.
- the modified YANG code could be as follows.
- a plurality of measurement results of each of the measurement targets may be included in one notification (eg, one notification message).
- each measurement object belonging to the transceiver statistics group, the reception window statistics group, the transmission statistics group, and the EPE statistics group is added to the list of additional measurement results or the entire measurement result (eg, list additional-transceiver-measurement- result, list additional-rx-window-measurement-result, list additional-tx-measurement-result, list additional-epe-measurement-result, etc.), the YANG model may be extended.
- the list of additional measurement results may include a start time (eg measurement start time), end time (eg measurement end time), and measurement results in that time interval (eg measurement values in measurement interval).
- the measurement period may be a time period from a start time to an end time.
- the existing YANG model In the existing YANG model, one notification including only one measurement result per measurement object may be transmitted.
- the fronthaul equipment eg, O-DU and/or O-RU
- the YANG model proposed in the present application may use the start time, end time, and measurement result of the existing YANG model as it is.
- the measurement result of the existing YANG model may include the first measurement result.
- the proposed YANG model can include a list of additional measurement results compared to the existing YANG model.
- the additional measurement result list may include one or more measurement results from the second measurement result.
- Measurement results may be arranged in chronological order (eg, in ascending order of measurement time) in the additional measurement result list. This operation may be referred to as “method a”. According to method a, since the measurement-related parameters used in the existing YANG model are used as they are, a backward compatibility problem may not occur.
- the existing O-DU that can decode only one measurement result in one notification decodes the existing parameter(s) (eg, transceiver-stats, rx-window-stats, tx-stats, epe-stats) can do.
- the existing O-DU may successfully receive one measurement result.
- the O-RU may set the last measurement result (eg, the most recent measurement result) from among the plurality of measurement results as an existing measurement result parameter, from the first measurement result to the last previous measurement result. It is possible to create an additional measurement result list (eg, additional-XXXX-measurement-result) including. This operation may be referred to as “method b”. According to method b, one measurement result that the existing O-DU can receive may be the most recent measurement result.
- the O-RU sets the number of measurement results (eg, number-of-additional-measurement-result) included in the additional measurement result list to the O-DU can inform you That is, the additional measurement result list may further include number-of-additional-measurement-result.
- the additional measurement result list may further include a sequence number (eg, seq-number).
- the sequence number for the measurement result in the measurement result list may start from 1 and may increase in chronological order. In this case, the sequence number of the existing measurement result (eg, the first measurement result) may be regarded as 0.
- the sequence number for the measurement result in the measurement result list may start from 0 and may increase in chronological order.
- the existing measurement result may be regarded as the last measurement result.
- the O-DU can easily arrange the measurement results in chronological order by using the sequence number as a key value of the additional measurement result list.
- the O-DU can easily find a specific measurement result using the sequence number.
- the sequence number may not be included in the additional measurement result list, and the start time and the end time instead of the sequence number may be used as key values of the additional measurement result list.
- the key of the additional measurement result list may not be specified. If the key of the additional measurement result list is not specified, the O-DU cannot directly access a specific entry (eg, a specific measurement result) in the additional measurement result list, and must always decode the entire additional measurement result list. . In order to reduce the number of parameters, number-of-additional-measurement-result may not be used.
- a sequence number which is a key value, may be defined as "ordered-by user".
- the O-RU may send the measurement result to the existing O-DU (eg, O-DU supporting the previous version of O-RAN M-Plane 7.0 version, O-DU in which decoding of the additional measurement result list is impossible)
- the O-RU may transmit leafs (eg, start-time, end-time, and XXXX-measurement-result[]) capable of transmitting one measurement result.
- the O-RU is an O-DU capable of processing an additional measurement result list (eg, O-DU supporting O-RAN M-Plane 7.0 version, O-RAN M-Plane version 7.0 or later)
- An additional measurement result list including all of the plurality of measurement results may be transmitted to the supported O-DU).
- an O-DU capable of processing the additional measurement result list may be referred to as a "new O-DU”
- an O-DU that cannot process the additional measurement result list may be referred to as an "existing O-DU”
- O-DU may mean a new O-DU and/or an existing O-DU.
- the YANG model described above in method c may be used as it is.
- transmission of the additional measurement result list eg, additional-XXXX-measurement-result[]
- additional-XXXX-measurement-result[] may be omitted, and only existing leafs may be used.
- the O-RU includes an additional measurement result list including a plurality of measurement results (additional-XXXX-measurement- result[]) may be transmitted to a new O-DU.
- all measurement results eg, measurement results from the first measurement result to the last measurement result
- the O-RU may transmit a notification including one measurement result for each measurement object to the existing O-DU.
- the existing O-DU may set the O-RU measurement interval and the notification interval to be the same so that one measurement result is generated at one notification interval.
- the existing O-DU sets the notification interval to be longer than the measurement interval, the O-RU may transmit only the most recent measurement result among the measurement results to the existing O-DU. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result reporting function>.
- the O-RU is the number of measurement results included in the additional measurement result list (number-of-additional-measurement-result) can inform the O-DU.
- the measurement result list may include a sequence number (seq-number).
- a sequence number for a measurement result in the measurement result list may start from 0 and may increase in chronological order.
- the O-DU can easily sort the measurement results in chronological order by using the sequence number as a key value in the list of additional measurement results.
- the O-DU can easily find a specific measurement result using the sequence number.
- the O-RU may send one notification including a plurality of measurement results.
- the O-RU may generate a plurality of additional measurement result lists based on the plurality of measurement results, and may transmit a notification including the plurality of additional measurement result lists to the O-DU.
- an O-RU that does not support the above-described operation may transmit one measurement result to the O-DU by using a leaf supporting transmission of one measurement result.
- the existing O-DU cannot decode the additional measurement result list, but may ignore the new additional leafs (eg, the additional measurement result list). Therefore, an error may not occur in the existing O-DU.
- the O-RU transmits “one measurement result (eg, one measurement result per measurement object, the most recent measurement result)” It is possible to transmit a notification including the leafs included” and "additional measurement result list including a plurality of measurement results" to the O-DU. All of the plurality of measurement values may be included in the additional measurement result list. This operation may be referred to as “method d”. In this case, one measurement result (eg, the most recent measurement result) may be included in both the existing leafs and the additional measurement result list.
- the O-RU may transmit a common notification in which both the existing O-DU and the new O-DU can be decoded. That is, implementation complexity of the O-RU may be reduced.
- the new O-DU may decode an additional measurement result list including a plurality of measurement results, and may perform a processing operation based on the plurality of measurement results.
- the O-RU may transmit leafs including one measurement result. In this case, redundant information may be reduced. Alternatively, the O-RU may generate the leafs including one measurement result and an additional measurement result list including one measurement result, and return the leafs including one measurement result and the additional measurement result list to O- It can be transmitted to the DU. That is, the same measurement result may be included in the leafs including one measurement result and the list of additional measurement results. In this case, overhead due to transmission of duplicate information may increase, but the new O-DU may always decode the additional measurement result list instead of the existing leafs regardless of the number of measurement results. In this case, the implementation complexity of the O-DU may be reduced.
- the new O-DU may support all functions of the existing O-DU. Therefore, even when existing leafs including one measurement result are received, the new O-DU can always decode the existing leafs. On the other hand, the existing O-DU may not be able to decode the additional measurement result list. The existing O-DU may ignore the additional measurement result list (eg, new leafs). Therefore, an error may not occur in the existing O-DU.
- the existing O-DU may receive existing leafs including one measurement result and may decode the existing leafs. In method d, the existing O-DU may always perform reception and decoding operations for one measurement result (eg, the most recent measurement result). Therefore, the existing O-DU can operate in the conventional manner. According to the above-described method, the backward compatibility problem can be solved. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result report function>.
- the O-RU is the number of measurement results included in the additional measurement result list (number-of-additional-measurement-result) can inform the O-DU.
- the measurement result list may include a sequence number (seq-number).
- a sequence number for a measurement result in the measurement result list may start from 0 and may increase in chronological order.
- the O-DU can easily sort the measurement results in chronological order by using the sequence number as a key value in the list of additional measurement results.
- the O-DU can easily find a specific measurement result using the sequence number.
- number-of-additional-measurement-result and seq-number may not be used, and start-time and end-time are to be used as keys of the additional measurement result list (additional-XXXX-measurement list).
- additional-XXXXX-measurement list can Measurement results for each measurement object may be arranged in an additional measurement result list (additional-xxxx-measurement-list[]) in chronological order.
- the structure of the YANG model according to method 2 described above may be defined as follows.
- the O-RU may send the measurement result to the existing O-DU (eg, O-DU supporting the previous version of O-RAN M-Plane 7.0 version, O-DU in which decoding of the additional measurement result list is impossible)
- the O-RU may transmit leafs (eg, start-time, end-time, and XXXX-measurement-result[]) capable of transmitting one measurement result.
- the O-RU is a new O-DU that can process an additional measurement result list (eg, O-DU supporting O-RAN M-Plane 7.0 version, O-RAN M-Plane version 7.0 or later)
- An additional measurement result list including a plurality of measurement results may be transmitted to an O-DU that supports . This action may be "method c".
- the YANG model described above in method c may be used as it is.
- the transmission of the additional measurement result list (additional-XXXX-measurement-result[]) may be omitted, and only existing leafs may be used.
- the O-RU includes an additional measurement result list (additional-XXXX-) including all of a plurality of measurement results.
- measurement-result[]) can be transmitted to a new O-DU.
- all measurement results eg, measurement results from the first measurement result to the last measurement result
- the O-RU may transmit a notification including one measurement result for each measurement object to the existing O-DU.
- the existing O-DU may set the O-RU measurement interval and the notification interval to be the same so that one measurement result is generated at one notification interval.
- the existing O-DU sets the notification interval to be longer than the measurement interval, the O-RU may transmit only the most recent measurement result among the measurement results to the existing O-DU. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result report function>.
- start-time and end-time can be used as keys of additional-XXXX-measurement list.
- the O-RU may send one notification including a plurality of measurement results.
- the O-RU may generate the additional measurement result list(s) based on the plurality of measurement results, and may transmit a notification including the additional measurement result list(s) to the O-DU.
- an O-RU that does not support the above-described operation may transmit one measurement result to the O-DU using leafs supporting transmission of one measurement result.
- the existing O-DU cannot decode the additional measurement result list, but may ignore the new additional leafs (eg, the additional measurement result list). Therefore, an error may not occur in the existing O-DU.
- the O-RU transmits “one measurement result (eg, one measurement result per measurement object, the most recent measurement result)” It is possible to send a notification including the "including leafs" and "an additional measurement result list including a plurality of measurement results” to the O-DU. All of the plurality of measurement values may be included in the additional measurement result list. This action may be "method d". In this case, one measurement result (eg, the most recent measurement result) may be included in both the existing leafs and the additional measurement result list.
- the O-RU may transmit a common notification in which both the existing O-DU and the new O-DU can be decoded. That is, implementation complexity of the O-RU may be reduced.
- the new O-DU may decode an additional measurement result list including a plurality of measurement results, and may perform a processing operation based on the plurality of measurement results.
- the O-RU may transmit leafs including one measurement result. In this case, redundant information may be reduced. Alternatively, the O-RU may generate leafs including one measurement result and an additional measurement result list including one measurement result, and return the leafs including one measurement result and the additional measurement result list to O- It can be transmitted to the DU. That is, the same measurement result may be included in the leafs including one measurement result and the list of additional measurement results. In this case, overhead due to transmission of duplicate information may increase, but the new O-DU may always decode the additional measurement result list instead of the existing leafs regardless of the number of measurement results. In this case, the implementation complexity of the O-DU may be reduced.
- the new O-DU may support all functions of the existing O-DU. Therefore, even when an existing leaf including one measurement result is received, the new O-DU can always decode the existing leaf. On the other hand, the existing O-DU may not be able to decode the additional measurement result list. The existing O-DU may ignore the additional measurement result list (eg, new leafs). Therefore, an error may not occur in the existing O-DU.
- the existing O-DU may receive an existing leaf including one measurement result and may decode the existing leaf. In method d, the existing O-DU may always perform reception and decoding operations for one measurement result (eg, the most recent measurement result). Therefore, the existing O-DU can operate in the conventional manner. According to the above-described method, the backward compatibility problem can be solved. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result report function>.
- number-of-additional-measurement-result and seq-number may not be used, and start-time and end-time may be used as keys of the additional-XXXX-measurement list.
- number-of-additional-measurement-result and seq-number may not be used, and the key for additional-XXXXX-measurement list may not be used. This action may be "Method 3".
- the structure of the YANG model according to method 3 may be as follows.
- the O-RU is a measurement result in the existing O-DU (eg, O-DU that supports the previous version of O-RAN M-Plane 7.0 version, O-DU that cannot decode the additional measurement result list)
- the O-RU may transmit leafs (eg, start-time, end-time, and XXXX-measurement-result[]) capable of transmitting one measurement result.
- the O-RU is an O-DU capable of processing an additional measurement result list (for example, O-DU supporting O-RAN M-Plane 7.0 version, O-RAN M-Plane 7.0 version later)
- An additional measurement result list including a plurality of measurement results may be transmitted to the supported O-DU). This action may be "method c".
- the YANG model described above in method c may be used as it is.
- transmission of the additional measurement result list eg, additional-XXXX-measurement-result[]
- additional-XXXX-measurement-result[] may be omitted, and only existing leafs may be used.
- the O-RU includes an additional measurement result list (additional-XXXX-) including all of a plurality of measurement results.
- measurement-result[]) can be transmitted to a new O-DU.
- all measurement results eg, measurement results from the first measurement result to the last measurement result
- the O-RU may transmit a notification including one measurement result for each measurement object to the existing O-DU.
- the existing O-DU may set the O-RU's measurement interval and the notification interval to be the same so that one measurement result is generated at one notification interval.
- the existing O-DU sets the notification interval to be longer than the measurement interval, the O-RU may transmit only the most recent measurement result among the measurement results to the existing O-DU. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result reporting function>.
- the modified YANG code according to this method can be defined as follows.
- the O-RU may send one notification including a plurality of measurement results.
- the O-RU may generate the additional measurement result list(s) based on the plurality of measurement results, and may transmit a notification including the additional measurement result list(s) to the O-DU.
- the O-RU that does not support the above-described operation may transmit one measurement result to the O-DU using leafs supporting transmission of one measurement result.
- the existing O-DU cannot decode the additional measurement result list, but may ignore the new additional leafs (eg, the additional measurement result list). Therefore, an error may not occur in the existing O-DU.
- the O-RU includes "one measurement result (eg, one measurement result per measurement object, the most recent measurement result)" It is possible to send a notification including the "leaves to do” and "additional measurement result list including a plurality of measurement results” to the O-DU. All of the plurality of measurement values may be included in the additional measurement result list. This action may be "method d". In this case, one measurement result (eg, the most recent measurement result) may be included in both the existing leafs and the additional measurement result list.
- the O-RU may transmit a common notification in which both the existing O-DU and the new O-DU can be decoded. That is, implementation complexity of the O-RU may be reduced.
- the new O-DU may decode an additional measurement result list including a plurality of measurement results, and may perform a processing operation based on the plurality of measurement results.
- the O-RU may transmit leafs including one measurement result. In this case, redundant information may be reduced. Alternatively, the O-RU may generate leafs including one measurement result and an additional measurement result list including one measurement result, and return the leafs including one measurement result and the additional measurement result list to O- It can be transmitted to the DU. That is, the same measurement result may be included in the leafs including one measurement result and the list of additional measurement results. In this case, overhead due to transmission of duplicate information may increase, but the new O-DU may always decode the additional measurement result list instead of the existing leafs regardless of the number of measurement results. In this case, the implementation complexity of the O-DU may be reduced.
- the new O-DU may support all functions of the existing O-DU. Therefore, even when existing leafs including one measurement result are received, the new O-DU can always decode the existing leafs. On the other hand, the existing O-DU may not be able to decode the additional measurement result list. The existing O-DU may ignore the additional measurement result list (eg, new leafs). Therefore, an error may not occur in the existing O-DU.
- the existing O-DU may receive existing leafs including one measurement result and may decode the existing leafs. In method d, the existing O-DU may always perform reception and decoding operations for one measurement result (eg, the most recent measurement result). Therefore, the existing O-DU can operate in the conventional manner. According to the above-described method, the backward compatibility problem can be solved. Detailed methods of the above-described operation are described in ⁇ Method for ensuring backward compatibility and interoperability with equipment that does not support a multi-measurement result reporting function>.
- number-of-additional-measurement-result and seq-number may not be used, and the key of additional-XXXXX-measurement list may not be used.
- Method a, method b, method c, and method d, as well as combinations and/or variations of the method(s) described above, may be used.
- parameters may be set as shown in Table 3 below.
- the O-RU may transmit a notification including two measurement results for the measurement object A and four measurement results for the measurement object B to the O-DU.
- the first measurement result for measurement object A (eg, a measurement value in the measurement interval of 0-30 minutes) may be included in the transceiver-stats in the notification, and the measurement interval of 0-30 minutes The start-time and end-time corresponding to can be set.
- the second measurement result for the measurement target A (eg, the measurement value in the measurement period of 30 to 60 minutes) may be included in additional-transceiver-measurement-result, and start- corresponding to the measurement period of 30 to 60 minutes time and end-time can be set.
- the first measurement result for measurement object B (eg, a measurement value in the measurement interval of 0 to 15 minutes) may be included in rx-window-stats in the notification, and start- corresponding to the measurement interval of 0 to 15 minutes time and end-time can be set.
- Second measurement result for measurement object B (for example, measured value in the measuring interval of 15 to 30 minutes), third measurement result for measurement object B (for example, measurement value in measurement interval of 30 to 45 minutes) ), and a fourth measurement result for measurement object B (eg, a measurement value in a measurement interval of 45 to 60 minutes) may be included in additional-rx-window-measurement-result, and a measurement interval of 15 to 30 minutes , start-time and end-time corresponding to each of the measurement period of 30 to 45 minutes, and the measurement period of 45 to 60 minutes may be set.
- the measurement result(s) from the first measurement result to the last previous measurement result are additional-transceiver-measurement-result and additional-rx-window-measurement- It may be set in result, and the last measurement result may be set in the existing transceiver-stats and rx-window-stats (eg, existing rx-window-stats) of measurement object A and measurement object B, respectively.
- start-time and end-time which are key values, may be set to “ordered-by user”.
- the transceiver-stats for measurement object A may be omitted within the notification, and the first measurement result for measurement object A (eg, the measurement value in the measurement interval of 0-30 minutes) and A second measurement result (eg, a measurement value in a measurement interval of 30 to 60 minutes) may be included in an additional-transceiver-measurement-result in the notification.
- the first measurement result for measurement object A eg, the measurement value in the measurement interval of 0-30 minutes
- a second measurement result eg, a measurement value in a measurement interval of 30 to 60 minutes
- rx-window-stats for measurement object B may be omitted, and the first measurement result for measurement object B (for example, a measurement value in the measurement interval of 0 to 15 minutes), the second measurement result ( For example, a measured value in a measuring interval of 15-30 minutes), a third measurement result (eg a measured value in a measuring interval of 30 to 45 minutes), and a fourth measurement result (eg 45-60) All measurement values in the measurement interval of minutes) may be included in additional-rx-window-measurement-result.
- the first measurement result for measurement object B for example, a measurement value in the measurement interval of 0 to 15 minutes
- the second measurement result For example, a measured value in a measuring interval of 15-30 minutes
- a third measurement result eg a measured value in a measuring interval of 30 to 45 minutes
- a fourth measurement result eg 45-60 All measurement values in the measurement interval of minutes
- the result of one measurement for measurement object A is the transceiver-stats in the notification.
- a first measurement result eg, a measurement value in a measurement interval of 0 to 30 minutes
- a second measurement result eg, a measurement value in a measurement interval of 30 to 60 minutes
- additional-transceiver-measurement-result in the notification.
- One measurement result for measurement object B (eg, the last measurement value in the notification interval (eg, the measurement value in the measurement interval of 45 to 60 minutes)) may be included in rx-window-stats in the notification, 1st measurement result for measurement object B (eg measured value in the measurement interval of 0 to 15 minutes), 2nd measurement result (eg measurement value in the measurement interval of 15 - 30 minutes), 3rd measurement Both the result (eg, the measured value in the measurement interval of 30 to 45 minutes) and the fourth measurement result (eg, the measured value in the measurement interval of 45 to 60 minutes) are additional-rx-window-measurement-result can be included in
- each of additional-transceiver-measurement-result, additional-rx-window-measurement-result, and additional-tx-measurement-result, additional-epe-measurement-result is YANG rather than notification It can be included in the front part of the module, transceiver-measurement-result, rx-window-measurement-result, tx-measurement-result and epe-measurement-result.
- transceiver-measurement-result, rx-window-measurement-result, tx-measurement-result, and epe-measurement-result which are the front parts of the YANG module, can be extended.
- the O-DU can check the measurement-result by using get RPC instead of the notification method. In this case, since the O-DU periodically transmits the get RPC, an overhead may occur accordingly.
- the entire structure in measurement-result-stats including measurement results of all measurement objects may be repeatedly added to the notification in chronological order for each measurement time.
- an additional measurement result list (eg, list additional-transceiver-measurement-result, list additional-rx-window-measurement-result, list additional-tx-measurement-result, list additional-epe-measurement-result), the YANG model may be extended.
- the additional measurement result list may not be added to the statistical information on the corresponding measurement object for each measurement object, and the entire structure in the measurement-result-stats including the measurement results of all measurement objects is in chronological order for each measurement time may be added to the notice.
- the YANG model according to ⁇ Method B-1> can be defined as follows.
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Abstract
Description
Claims (20)
- O-RAN(open-radio access network)에서 O-RU(O-RAN radio unit)의 동작 방법으로서,통지 간격(notification interval)에 따른 하나의 통지 구간에서 제1 측정 대상에 대한 측정 동작을 수행함으로써 복수의 제1 측정 결과들을 생성하는 단계;상기 복수의 제1 측정 결과들을 포함하는 제1 측정 결과 리스트를 생성하는 단계; 및상기 제1 측정 결과 리스트를 포함하는 메시지를 O-DU(O-RAN distributed unit)에 전송하는 단계를 포함하는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 O-RU의 동작 방법은,상기 복수의 제1 측정 결과들 중에서 가장 최신의 측정 결과를 포함하는 제1 통지를 생성하는 단계를 더 포함하며,상기 메시지는 제1 통지를 더 포함하는, O-RU의 동작 방법.
- 청구항 2에 있어서,상기 제1 측정 결과 리스트는 상기 O-RAN의 특정 버전 이후의 버전을 지원하는 상기 O-DU에서 디코딩되고, 상기 제1 통지는 상기 특정 버전 이전의 버전을 지원하는 상기 O-DU에서 디코딩되는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 O-RU의 동작 방법은,상기 하나의 통지 구간에서 제2 측정 대상에 대한 측정 동작을 수행함으로써 복수의 제2 측정 결과들을 생성하는 단계; 및상기 복수의 제2 측정 결과들을 포함하는 제2 측정 결과 리스트를 생성하는 단계를 더 포함하며,상기 메시지는 상기 제2 측정 결과 리스트를 더 포함하는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 제1 측정 결과 리스트는 상기 복수의 제1 측정 결과들 각각에 대한 측정 시작 시간 정보 및 측정 종료 시간 정보를 더 포함하는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 복수의 제1 측정 결과들은 상기 제1 측정 결과 리스트 내에서 측정 시간의 오름차순으로 정렬되는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 제1 측정 결과 리스트는 상기 복수의 제1 측정 결과들의 개수를 지시하는 정보 및 상기 복수의 제1 측정 결과들 각각의 시퀀스 번호(sequence number) 중에서 적어도 하나를 더 포함하는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 통지 간격은 하나의 측정 동작이 수행되는 측정 간격보다 길도록 상기 O-DU에 의해 설정되는, O-RU의 동작 방법.
- 청구항 1에 있어서,상기 제1 측정 대상은 트랜시버(transceiver), 수신 윈도우(rx-window), 전송 측정(tx-measurement), EPE(energy, power, environmental), 또는 심볼 RSSI(received signal strength indicator)인, O-RU의 동작 방법.
- O-RAN(open-radio access network)에서 O-RU(O-RAN radio unit)의 동작 방법으로서,통지 간격(notification interval)에 따른 하나의 통지 구간에서 제1 측정 대상에 대한 측정 동작을 수행함으로써 제1 측정 결과를 생성하는 단계;상기 제1 측정 결과를 포함하는 제1 통지(notification)를 생성하는 단계;상기 제1 측정 결과를 포함하는 제1 측정 결과 리스트를 생성하는 단계; 및상기 제1 통지 및 상기 제1 측정 결과 리스트를 포함하는 메시지를 O-DU(O-RAN distributed unit)에 전송하는 단계를 포함하는, O-RU의 동작 방법.
- 청구항 10에 있어서,상기 제1 측정 결과 리스트는 상기 O-RAN의 특정 버전 이후의 버전을 지원하는 상기 O-DU에서 디코딩되고, 상기 제1 통지는 상기 특정 버전 이전의 버전을 지원하는 상기 O-DU에서 디코딩되는, O-RU의 동작 방법.
- 청구항 10에 있어서,상기 통지 간격은 하나의 측정 동작이 수행되는 측정 간격과 동일하도록 상기 O-DU에 의해 설정되는, O-RU의 동작 방법.
- 청구항 10에 있어서,상기 O-RU의 동작 방법은,상기 하나의 통지 구간에서 제2 측정 대상에 대한 측정 동작을 수행함으로써 제2 측정 결과를 생성하는 단계;상기 제2 측정 결과를 포함하는 제2 통지(notification)를 생성하는 단계; 및상기 제2 측정 결과를 포함하는 제2 측정 결과 리스트를 생성하는 단계를 더 포함하며,상기 메시지는 상기 제2 통지 및 상기 제2 측정 결과 리스트를 더 포함하는, O-RU의 동작 방법.
- O-RAN(open-radio access network)에서 O-DU(O-RAN distributed unit)의 동작 방법으로서,O-RU(O-RAN radio unit)를 위한 통지 간격(notification interval) 및 측정 간격을 설정하는 단계;제1 측정 대상에 대한 복수의 제1 측정 결과들을 포함하는 제1 측정 결과 리스트를 포함하는 메시지를 상기 O-RU로부터 수신하는 단계; 및상기 제1 측정 결과 리스트를 디코딩함으로써 상기 복수의 제1 측정 결과들을 확인하는 단계를 포함하며,상기 복수의 제1 측정 결과들은 상기 통지 간격에 따른 하나의 통지 구간에서 측정되는, O-DU의 동작 방법.
- 청구항 14에 있어서,상기 메시지는 상기 복수의 제1 측정 결과들 중에서 가장 최신의 측정 결과를 포함하는 제1 통지를 더 포함하는, O-DU의 동작 방법.
- 청구항 15에 있어서,상기 제1 측정 결과 리스트는 상기 O-RAN의 특정 버전 이후의 버전을 지원하는 상기 O-DU에서 디코딩되고, 상기 제1 통지는 상기 특정 버전 이전의 버전을 지원하는 다른 O-DU에서 디코딩되는, O-DU의 동작 방법.
- 청구항 14에 있어서,상기 제1 측정 결과 리스트는 상기 복수의 제1 측정 결과들 각각에 대한 측정 시작 시간 정보 및 측정 종료 시간 정보를 더 포함하는, O-DU의 동작 방법.
- 청구항 14에 있어서,상기 복수의 제1 측정 결과들은 상기 제1 측정 결과 리스트 내에서 측정 시간의 오름차순으로 정렬되는, O-DU의 동작 방법.
- 청구항 14에 있어서,상기 제1 측정 결과 리스트는 상기 복수의 제1 측정 결과들의 개수를 지시하는 정보 및 상기 복수의 제1 측정 결과들 각각의 시퀀스 번호(sequence number) 중에서 적어도 하나를 더 포함하는, O-DU의 동작 방법.
- 청구항 14에 있어서,상기 제1 측정 대상은 트랜시버(transceiver), 수신 윈도우(rx-window), 전송 측정(tx-measurement), EPE(energy, power, environmental), 또는 심볼 RSSI(received signal strength indicator)인, O-DU의 동작 방법.
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