KR102109460B1 - Method for reconfiguring radio access network and reconfigurable device using the same - Google Patents

Abstract

The present invention relates to a reconfigurable device for executing a radio access network (RAN) application which comprises: a communication service layer; a radio control framework on a radio computer; and a multiradio interface between the communication service layer and the radio control framework. The communication service layer transmits request information according to the execution of the RAN application to the radio control framework through a multi-radio interface. The radio control framework generates a control signal to reconstruct the infrastructure based on the request information.

Description

A RAN reconfiguration method and a reconfigurable device using the same {METHOD FOR RECONFIGURING RADIO ACCESS NETWORK AND RECONFIGURABLE DEVICE USING THE SAME}

The present invention relates to a radio access network (RAN) reconfiguration method and a reconfigurable device using the same, and more particularly, a reconfigurable method having a multi-radio interface for controlling execution of a hardware-independent integrated radio application. It relates to a method of reconfiguring the RAN according to the execution of the RAN application on the device.

Software Defined Radio (SDR) enables global communication by downloading object-oriented structure application software on an open structure single hardware platform to build a system that can be flexibly adapted to various wireless access environments. Technology.

SDR technology reduces fixed hardware functions on the user's mobile device from a signal processing point of view, expands the hardware part programmable by radio applications, and increases the flexibility of the system by using the extended software programming capability. It is a wireless technology.

The structure of such an SDR terminal device should be open, distributed, object oriented, and software controllable. In particular, a multi-mode SDR that can accommodate various wireless standards is required for global communication. In this atmosphere, research on multi-mode SDR is currently actively underway.

An object of the present invention for solving the above problems is to provide a reconfigurable device.

Another object of the present invention for solving the above problems is to provide a RAN reconfiguration method.

A reconfigurable device for executing a radio access network (RAN) application according to an embodiment of the present invention for achieving the above object is a communication service layer, a radio control framework on a radio computer, and a communication service layer between the radio control framework The interface includes a multi-radio interface, and the communication service layer delivers request information according to execution of the RAN application to the radio control framework through the multi-radio interface, and the control control framework establishes the infrastructure based on the request information. It is possible to generate a control signal to reconstruct.

Here, the communication service layer may include an administrator and a mobility policy manager.

Here, the administrator can transmit the change information of the base station (BS) parameter value to the radio control framework through the multi-radio interface.

Here, the mobility policy manager may transmit information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling to a radio control framework through a multiradio interface.

Here, the radio control framework may include a configuration manager and a radio connection manager.

Here, the setting manager may generate a control signal for reconfiguring the infrastructure based on the change information of the base station (BS) parameter value received from the communication service layer.

Here, the radio connection manager may generate a control signal reconstructing the infrastructure based on information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling received from the communication service layer.

Here, the multi-radio interface may provide an administrator service and an access control service.

Here, the manager service may include a service that delivers change information of a base station (BS) parameter value between the communication service layer and the radio control framework.

Here, the access control service may include a service that delivers information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling between the communication service layer and the radio control framework.

Radio Access Network (RAN) reconfiguration of a reconfigurable device including a multi-radio interface between a communication service layer, a radio control framework, and a communication service layer and a radio control framework according to an embodiment of the present invention for achieving the other object The method includes transmitting request information according to the execution of the RAN application from the communication service layer to the radio control framework through a multi-radio interface, and generating a control signal for reconfiguring the infrastructure based on the request information by the radio control framework. It may include the steps.

Here, the communication service layer may include an administrator and a mobility policy manager.

Here, the step of transmitting the request information according to the execution of the RAN application from the communication service layer to the radio control framework through the multi-radio interface, the administrator changes the BS (Base Station) parameter value change information through the multi-radio interface And passing it to the control framework.

Here, the step of delivering the request information according to the execution of the RAN application from the communication service layer to the radio control framework through the multi-radio interface, mobility prediction, soft / hard handover management and inter-cell interference handling by the mobility policy manager And transmitting information on at least one of them to the radio control framework through the multi-radio interface.

Here, the radio control framework may include a configuration manager and a radio connection manager.

Here, the step of generating a control signal for reconfiguring the infrastructure based on the request information by the radio control framework, the infrastructure based on the change information of the base station (BS) parameter value received from the communication service layer by the configuration manager And generating a control signal to reconstruct the structure.

Here, the step of generating a control signal for reconfiguring the infrastructure based on the request information by the radio control framework includes: mobility prediction, soft / hard handover management, and inter-cell received from the communication service layer by the radio connection manager. And generating a control signal reconstructing the infrastructure based on the information on at least one of the interference handling.

Here, the multi-radio interface may provide an administrator service and an access control service.

Here, the manager service may include a service that delivers change information of a base station (BS) parameter value between the communication service layer and the radio control framework.

Here, the access control service may include a service that delivers information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling between the communication service layer and the radio control framework.

According to the present invention, a reference model of a RAN architecture considering a problem of radio access such as mobility management, inter-cell interference handling, load balancing, etc., which is a main function of RAN, as well as reconfiguration of a radio access network (RAN) is provided. Can be.

1 is an exemplary view illustrating a case where a radio application package distributed from an online app store is downloaded from a device according to an embodiment of the present invention.
2 is a block diagram illustrating a software architecture of an apparatus according to an embodiment of the present invention.
FIG. 3 is a conceptual diagram illustrating four interfaces associated with a device in a usage environment of a reconfigurable device according to an embodiment of the present invention.
4 is a block diagram showing an interconnection between a communication service layer and a radio control framework using a multi-radio interface of a device according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a reconfigurable RAN architecture of a device according to an embodiment of the present invention.
6 is a flowchart of an operation for controlling reconfiguration of an infrastructure according to application execution according to an embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

The terms first, second, A, B, etc. can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term "and / or" includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the overall understanding in describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

In order to describe the present invention, brief definitions of terms used in general are summarized. Terms other than those below provide definitions where appropriate within the specification.

Radio Application (RA): An application for providing a specific hardware configuration of a device and a radio communication environment independent of a user application. The radio application may be configured to operate on a radio processor, or consist of a radio processor execution portion and an application processor execution portion to operate on two processors. The radio application consists of a radio controller and function blocks. The function block may include standard function blocks and user-defined function blocks.

Radio Application Package (RAP): A distribution form of a radio application, which includes pipeline controller metadata along with radio controllers and function blocks that are components of the radio application. In addition, the radio application package may additionally include a radio library.

Standard Function Block (SBF): Standard function blocks are standard function blocks whose functions are standardized with the names of the functions of each block and the functions for executing the blocks. The standard function block will be a collection of standard function blocks implemented by a hardware manufacturer when a radio platform chip vendor manufactures a standard function block, and may be provided with a driver. The standard function block may be implemented using a dedicated hardware accelerator, or may be implemented as executable code running on the core of the radio processor. When implemented as executable code running on the core of a radio processor, it may be referred to as a radio library. Standard function blocks have standardized function names and functions, and can be defined by a standard radio library header file.

User Defined Function Block (UDFB): Functional blocks that may not be provided as a standard function block or may be provided by a radio application provider when there is a need to further customize a function existing as a standard function block, It can be implemented to run on the core of a radio processor. The user-defined function block may be provided as executable code, source code, or intermediate expression code.

User Defined Function Block (UDFB) set: It may be a collection of user defined function blocks provided by a radio application provider.

Radio Hardware Abstract Layer (HAL): A layer that abstracts many types of HW from the OS point of view. The standardized abstraction accelerator interface is hardware independent, but because of HAL, the OS is accessible to all hardware. Similar to the role of the driver, but unlike the driver, which changes as the hardware changes, HAL is included in the OS.

Radio Platform Driver: Software required by the OS to recognize hardware. It is a hardware independent OS instruction. It is software to match the instruction system of hardware with each other, and can act as a general hardware driver.

Radio Platform: It may be part of the device hardware for RF functions such as fixed and / or programmable hardware accelerators, RF transceivers, antennas. That is, the radio platform may be part of hardware capable of generating or receiving RF signals. In essence, the radio platform may be heterogeneous hardware that includes other processing elements, such as a fixed accelerator such as an application specific integrated circuit (ASIC) or a reconfigurable accelerator such as an FPGA. .

Radio Computer: It may be a collection of radio processors (RPs) and radio platforms within a reconfigurable device. In the device, individual radio applications can be designed as software elements running on a radio processor that can be viewed as a more general purpose computing element.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the overall understanding in describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

1 is an exemplary view illustrating a case where a radio application package distributed from an online app store is downloaded from a device according to an embodiment of the present invention.

Referring to FIG. 1, the device 10 according to the present embodiment may operate in various wireless network environments by downloading and installing radio applications from a radio application store or a radio application provider.

That is, the device 10 accesses the online app store 20, selects a desired radio application from a list of radio applications supporting various wireless communication methods provided by the app store, and a radio application package including the corresponding radio application You can download it.

Various wireless methods may include Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA), Worldwide Interoperability for Microwave Access (WiMAX), Global System for Mobile Communications (GSM), Radio-Frequency Identification (RFID), and the like. have. The user can download and install a plurality of radio applications on his terminal and freely execute the necessary radio applications depending on the situation.

2 is a block diagram illustrating a software architecture of an apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the radio software architecture of the device according to the present embodiment includes an application processor layer operating on an application processor (AP) 110 and a radio operating on a radio processor (RP) 610. It may be composed of a processor layer. The combination of radio processor and radio platform may be referred to as radio computer 120.

That is, FIG. 2 illustrates a software architecture environment in which a radio control framework (RCF) 126, which will be described later, is divided into an application processor execution part and a radio processor execution part and operates on two processors. Of course, the radio control framework 126 may be implemented to be executed in a radio processor or a radio operating system (OS) 121.

On the application processor 110, a non-real time operating system (OS, Operating Systems) such as Google's Android OS and Apple's iOS is operated, or radio is described below on the radio processor. A real-time operating system (Real Time OS) called OS 121 may operate. For a clear distinction, the non-real-time operating system operating in the application processor layer will be referred to as 'Operating System (OS)' and the real-time operating system operating in the radio processor layer will be classified as 'real-time operating system (Radio OS)'.

The components constituting the application processor layer, the radio processor layer, and the radio control framework 126 will be described in more detail as follows.

application  Processor

As illustrated in FIG. 2, the application processor 110 may include components such as a driver 111, an operating system (OS) 112, and a communication service layer 113.

The driver 111 drives hardware devices on a given operating system 112. Hardware devices may include cameras, speakers, and the like.

The operating system 112 may include a non-real time operating system (Non-Real Time OS) operating in a typical mobile device, such as Android and iOS. When the radio control framework 126 is configured to operate on the application processor 110 and the radio processor 610, an application processor layer execution portion of the radio control framework 126 may exist on the operating system 112.

The communication service layer 113 may provide at least some of the three services described below to the radio control framework 126.

The first service is a service related to administrative, which is related to installation / uninstallation of radio applications, creation / deletion of instances, and acquisition of a list of radio applications for status of installation, instances, activities, etc. to be.

The second service is a service related to access control, which is a service related to execution / non-execution of radio applications, data flow generation, network allocation generation, and acquisition of a list of radio applications for states of each installation, instance, and activity.

Finally, the third service is a service related to sending and receiving user data as a service related to data flow.

As one example of the configuration of the communication service layer 113 for providing at least some of the three services described above, the communication service layer includes an administrator application, a mobility policy manager, and a networking stack. And at least a part of a monitor. The networking stack may include a protocol stack operating at the communication service layer.

Meanwhile, the communication service layer 113 may include only some of the above-described components, or may include additional components other than the above-described components. Further, the communication service layer 113 may include components in which functions of at least two or more of the above-described components are integrated. In addition, the above-described components are only an example of the components that the communication service layer 113 must have in order to support the services that the communication service layer 113 must perform. That is, the communication service layer 113 is defined by a role played by the communication service layer 113, and the configuration of the communication service layer 113 is not limited by examples of the above-described components.

In a configuration in which the radio control framework 126 operates in the application processor 110 and the radio processor 610, radio applications that are targets of a method of distribution, installation, and execution to the device 10 according to the present embodiment are respectively applications. It may be composed of a processor layer execution portion and a radio processor layer execution portion. The radio controller (RC), which is the execution part of the application processor layer of the radio application, sends context information to the monitor of the communication service layer 113 or the networking stack of the communication service layer 113 And it can play a role of exchanging data.

Radio computer

The radio processor 610 includes a radio operating system 121, a radio platform driver 122, and a radio platform 123, as shown in FIG.

The radio operating system (OS) 121 is a real-time operating system. When the radio control framework 126 is configured to operate on the application processor 110 and the radio processor 610, a radio processor execution part of the radio control framework 126 may exist on the radio OS 121.

The radio platform driver 122 is a component required by the radio OS 121 to recognize a hardware radio platform like a general hardware driver.

If the radio control framework 126 is a configuration that operates only on the radio processor 610 (see FIG. 3), reconfigurable radio applications that are targeted for deployment, installation, and execution to the device 10 according to this embodiment are radio processors. It can operate in layers.

A radio controller (RC) of each radio application sends context information to a monitor of a communication service layer 113 or exchanges data with a networking stack of the communication service layer 113 Play the receiving role.

The aforementioned radio processor 610 may configure the radio computer 120 together with the radio platform 123 or radio platform hardware. Here, the radio platform hardware (Radio Platform Hardware) may be generally composed of a programmable hardware (123-1) of the radio processor and the baseband accelerator (s) (123-2). The baseband accelerator 123-2, which is prepared for the standard functional block (s) 517-1 to M, can often be provided in the form of an application-specific integrated circuit (ASIC). Also, the radio platform 123 may include an RF transceiver 123-3 and an antenna 123-4.

A multi-radio interface (MURI) may be disposed between the aforementioned communication service layer 113 and the control radio control framework 126, and between the radio control framework 126 and the integrated radio application 125. An integrated radio application interface (URAI) may be disposed in the. In addition, a reconfigurable radio frequency interface (RRFI) may be disposed between the integrated radio application 125 and the RF transceiver 123-3.

The radio application is an application that enables communication of a mobile terminal and may be distributed in the form of a radio application package (RAP) 510. The radio application package 510 includes a function block (FB), a pipeline configuration metadata (513), a radio controller code (RC code) 512, and a radio library (Radio Library) 514. It may contain elements.

The radio library 514 may be included and distributed together in the form of executable code in the radio application package 510 when the standard function block 517-1 is distributed in the form of executable code, and the radio application package 510 may be an application. Downloaded to the OS 112 of the processor 110, the configuration code (Configcodes) and the radio library 514 refers to the pipeline configuration metadata 513, the application processor 110, the radio processor 610 or radio OS After being loaded with 121, it may be mounted on a radio computer.

Software architecture of reconfigurable RF interface

3 is a conceptual diagram illustrating four interfaces associated with a device in a usage environment of a reconfigurable device according to an embodiment of the present invention.

Referring to FIG. 3, a reconfigurable terminal device according to the present exemplary embodiment can simultaneously execute multiple / multiple radios and radio by a new radio application package (RAP) 510. You can change your settings. All radio applications (RAs) may be referred to as Unified Radio Applications (URAs) when representing common attributes or characteristics in terms of requirements related to radio reconfiguration of the device.

In order to execute multiple / multiple integrated radio applications, a reconfigurable mobile device (hereinafter, also referred to simply as a device) includes a communication service layer (CSL) 113, a radio control framework (RCF) ( 126), a Radio Platform 123, and four sets of interfaces for their interconnection.

The four interfaces associated with the reconfigurable device according to the present embodiment are multi-radio interfaces (MURI), which are interfaces between each component of the communication service layer 113 and each component of the radio control framework 126. , Reconfigurable Radio Frequency Interface (RRFI), which is the interface between the Unified Radio Application (URA) 125 and the Radio Frequency Transceiver (123-3), and the Integrated Radio Application 125. A radio programming interface (RPI, Radio), which is an interface between each component of the radio control framework 126, a Unified Radio Application Interface (URAI), and an independent and uniform production of radio applications. Programming Interface).

Radio control Framework

The radio control framework 126 described above will be described in more detail as follows.

Radio Control Framework (RCF) 126 is a component that provides an operating environment for radio applications.

If the radio control framework 126 is configured to operate on the application processor 110 and the radio processor 610, the radio control framework 126 may be divided into two groups. That is, one group operates on the application processor 110, and the other group operates on the radio processor 610. Which components of the radio control framework 126 operate in real time (operating on the radio processor) and which components operate non-real time (operating on the application processor) can be determined differently for each vendor.

The Radio Control Framework (RCF) 126 may be configured to manage radio application (s), including at least some of the following five components by default.

A configuration manager (CM) performs installation / uninstallation of radio applications for multi-radio devices, creation / deletion of instances, and access management of radio parameters of radio applications.

A Radio Connection Manager (RCM) performs overall management of user data flows that can be switched from one radio application to another radio application and activation / deactivation of radio applications according to user requirements.

A flow controller (FC) performs transmission and reception of user data packets and flow control.

A multi-radio controller (MRC) schedules requests for radio resources from radio applications that are simultaneously executed in order to detect interoperability problems between radio applications in advance.

A resource manager (RM) manages multi-radio resources to share multi-radio resources among active radio applications while satisfying real-time requirements.

Meanwhile, the radio control framework 126 may include only some of the five components described above, and may further include components other than the five components. Alternatively, the radio control framework 126 may be composed of components in which functions of at least two or more components described below are integrated. The functions and roles of the radio control framework 126 are defined by functions performed by components described below, and the configuration of the radio control framework 126 is not limited by example components described below. That is, the radio control framework 126 may have various configurations for performing at least some of the functions of the components described below.

4 is a block diagram showing an interconnection between a communication service layer and a radio control framework using a multi-radio interface of a device according to an embodiment of the present invention.

In other words, FIG. 4 shows how the communication service layer (CSL) and the radio control framework (RCF) interact with each other using a multiradio interface (MURI).

As shown in FIG. 4, the multi-radio interface includes a communication service layer and a radio control frame for three types of services: administrative services, access control services, and data flow services. It can support the interface between works.

At least one of an administrative service, an access control service, and a data flow service comprises components of a communication service layer using a multi-radio interface and the radio control framework. It can be provided by interlocking elements. On the other hand, as mentioned above, the radio control framework operates on a radio computer and can interwork with a communication service layer to provide an operating environment of an integrated radio application.

The three types of services supported through the multi-radio interface will be described in more detail as follows. For each service, the components of the communication service layer and the components of the radio control framework, which are subjects or interworking objects using a multi-radio interface, are described later.

Administrative services may be mainly used by components such as an administrator included in a communication service layer. Administrators can install or uninstall new integrated radio applications on reconfigurable devices, and create or remove instances of integrated radio applications. Installation and loading can be performed during runtime as well as at device startup time to establish network connectivity when reconfiguring available integrated radio applications. The multiradio interface can detect when and how reconfiguration of the device is required without making any assumptions.

Access Control Services (Access Control Services) can be mainly used by the mobility policy manager (Mobility Policy Manager, MPM) included in the communication service layer, related to the use of user policies and other radio access technologies (Radio Access Technologies, RATs) It can be used to keep references and choose between them. Modeling of such reference and selection algorithms (eg, selection algorithms for which RAT is selected in which wireless environment) is not basically included in the scope of the present invention, but the multi-radio interface specification includes communication service layer and radio control. And exchange of information in RAT selection decisions between frameworks. The reference itself can be generated locally in applications or end user settings, as well as in a distribution manner from a network operator or a cognitive radio management framework.

Data Flow Services may be mainly used by a network stack included in a communication service layer of a reconfigurable device, for example, a Transmission Control Protocol / Internet Protocol (TCP / IP) stack. Accordingly, the data flow service can express the setting of (logical) link layer services, which can be uniformly provided regardless of activation of the integrated radio application.

Although not illustrated in FIG. 4, the multi-radio interface may further support an interface between a communication service layer for monitoring services and a radio control framework.

Monitoring services can be mainly used by monitors included in the communication service layer, and can be used to indicate the status of context information and computational / spectral resource management. Can be.

5 is a conceptual diagram illustrating a reconfigurable RAN architecture of a device according to an embodiment of the present invention.

In other words, FIG. 5 shows devices such as the structure of a software defined network (SDN) to describe a reconfigurable radio access network (RAN) architecture, such as an application layer, a control layer, and an infrastructure. This diagram is divided into structure layers (Infrastructure Layer). However, the present invention is not limited to technologies applied to software-defined networks.

Application layer reconfiguration of RAN such as Multi-Radio Access Technologies Management Application, Mobility Management Application, Interference Handling Applicatioin, and Load Balancing Application Related applications may be included, and data may be transferred to a control layer through a Northbound Interface.

The control layer may include the above-described communication service layer (CSL) and a radio control framework (RCF). Here, the communication service layer can transmit data to the radio control framework through a multi-radio interface (MURI) based on the data acquired through the northbound interface, and the radio control framework through the multi-radio interface. Based on the acquired data, data may be transferred to the infrastructure layer through an integrated radio application interface (URAI).

The infrastructure layer may include Unified Radio Applications (URAs) and Radio Platforms, and the radio platform may acquire data from the control layer through the integrated radio application interface.

The integrated radio application may mean a plurality of radio applications that exhibit common attributes or characteristics in terms of requirements related to radio reconfiguration of the device.

The radio platform is a native radio library (RVM), a radio virtual machine (RVM), a radio operating system (ROS), and a baseband unit (BBU) that decodes received data. Each may include a plurality of sets (set), each of which can be used to form a remote radio head (RRH, Remote Radio Head) and a front-hole network (Fronthaul Network). Here, the remote radio head may be reconfigured to allow adaptation such as bandwidth, carrier frequency, and output power level.

In one embodiment of the present invention, the operation or function of a multi-radio interface between a communication service layer, a radio control framework, and a communication service layer and a radio control framework for reconfigurable RAN in the above-described architecture is as follows.

When an application implementing a given task related to radio access is executed, corresponding commands may be transmitted from the application layer to the communication service layer through the northbound interface.

In this regard, the function of each entity of the communication service layer may be represented as shown in Table 1, but is not limited thereto.

Referring to Table 1, the communication service layer may perform each function by an administrator, a mobility policy manager, a networking stack, and a monitor for reconfiguration as described above. , Each function has been described above, but is not limited thereto.

Further, according to an embodiment of the present invention, the communication service layer may perform each function by the administrator and the mobility policy manager for the RAN application in addition to the above-described functions.

In more detail, according to the command acquired through the Northbound interface, the administrator of the communication service layer can determine the base station (BS) parameter values such as cell ID, transmission power (tx power), and tilting angle. Changes can be requested to the radio control framework, and the mobility policy manager at the communication service layer manages mobility prediction, soft / hard handover, and handling of inter-cell. interference) to the radio control framework.

Subsequently, the commands can be transmitted from the communication service layer to the radio control framework through the multiradio interface. In other words, the corresponding entity of the communication service layer can pass commands to the radio control framework through the multiradio interface.

In this regard, the function of each entity of the radio control framework may be represented as shown in Table 2, but is not limited thereto.

Referring to Table 2, the radio control framework includes a configuration manager, a radio connection manager, a flow controller, a resource manager, and multi-radio for reconfiguration as described above. A controller (Multi Radio Controller) may perform each function, and each function has been described above, but is not limited thereto.

In addition, according to an embodiment of the present invention, the radio control framework may perform each function by the configuration manager and the radio connection manager for the RAN application in addition to the functions described above.

In more detail, according to the command acquired through the multi-radio interface, the configuration manager of the radio control framework can change BS parameter values such as cell ID, transmission strength and tilting angle, and the radio connection manager of the radio control framework Mobility prediction, soft / hard handover management and inter-cell interference handling can be implemented.

In other words, the configuration manager and the radio connection manager of the radio control framework may generate appropriate control signals for the infrastructure that is reconstructed according to commands to perform the above-described functions, and may transmit the control signals to the infrastructure.

Here, a service capable of supporting a multi-radio interface between a communication service layer and a radio control framework may be represented as shown in Table 3, but is not limited thereto.

Referring to Table 3, the multi-radio interface, as described above, for the service for reconfiguration, the administrator service between the communication service layer and the radio control framework (Administrator Services), access control services (Access Control Services), data flow services (Data Flow Services) and Monitoring Services, and each service is described above, but is not limited thereto.

In addition, according to an embodiment of the present invention, the multi-radio interface may provide an administrator service and an access control service for a RAN application in addition to the above-described functions.

In more detail, the manager service of the multi-radio interface between the communication service layer and the radio control framework may include a service that delivers information on changing BS parameter values such as cell ID, transmission strength, and tilting angle. The access control service of the radio interface may include a service that delivers information on mobility prediction, soft / hard handover management, and inter-cell interference handling.

For convenience of description of the operation of the present invention, mobility management in wireless access operation will be described as an example.

When an application related to mobility management is executed, a command corresponding thereto may be transmitted from the application layer to the communication service layer through the northbound interface, and the mobility policy manager of the communication service layer may issue a command to execute mobility management in a multi-radio interface. It can be delivered to the radio connection manager of the radio control framework using the access control service of.

Thereafter, the radio connection manager of the radio control framework may control the reconfiguration of the infrastructure according to the mobility management application. Here, when the handover is executed, the flow controller manages the data flow, so that the flow controller and the radio connection manager are included in the execution of the mobility management application, so that not only the radio connection manager but also the flow controller can control the reconfiguration of the infrastructure together. You can.

The infrastructure layer is a baseband unit (BBU, BaseBand Unit) as shown in FIG. 5 to support efficient use of computational resources of a radio computer, cooperative processing such as Inter-Cell Interference Coordination (ICIC), and efficient network upgrade / maintenance. It can include the architecture of Pool.

Applications at the application layer can be differentiated from RA codes as they are executed in corresponding BBUs in the infrastructure layer's radio platform. In addition, heterogeneous BBUs in the BBU pool of the infrastructure layer may have different characteristics, and between URA and each BBU hardware platform to solve the problem of software portability caused by the heterogeneous BBU hardware platform. RVM may exist.

Here, the issue of portability is that each hardware platform, if the BBU pool includes a variety of hardware platforms, such as general purpose processors, digital signal processors, field programmable gate arrays and application-specific integrated circuits to improve programmability, power consumption and computational capabilities. For this, it may mean a problem that requires efficient compilation of wireless application code.

RVM can be operated on a radio operating system (ROS) on the BBU hardware platform to solve the above portability problem, and executes all algorithms included in given configuration code for various types of physical resources. It can mean an abstraction machine that abstracts heterogeneous platforms.

Therefore, RVM abstracts the physical resources of each hardware platform into virtualization resources, so that RA codes such as platform-independent configuration codes can be ported regardless of the type of hardware platform. While RVM is being executed, the Native Radio Library can be used to interpret configuration codes for each platform.

Here, the abstraction resources of RVM are abstract processing elements (APEs), data objects (DOs), and abstract switch fabrics (ASFs) that abstract computational resources, memory resources, and switch resources, respectively. It may include, but is not limited to this.

RVM executes platform-independent configuration code according to the platform-specific native radio library, so back-end compilation can be optimized by RVM.

6 is a flowchart of an operation for controlling reconfiguration of an infrastructure according to application execution according to an embodiment of the present invention.

Referring to FIG. 6, the communication service layer according to an embodiment of the present invention may receive command information related to RAN reconfiguration according to an application executed through a northbound interface from an application layer (S610), and based on the obtained command Through the multi-radio interface, it is possible to perform a RAN reconfiguration request according to a command with a radio control framework (S620). Thereafter, the radio control framework may generate a control signal for the infrastructure according to the RAN reconfiguration request (S630), and may use this to perform reconfiguration of the infrastructure (S640).

Here, when the application to be executed is an application related to BS parameter change, the administrator of the communication service layer can transmit a corresponding command to the configuration manager of the radio control framework through the manager service of the multi-radio interface, and the radio control framework Based on this, the configuration manager can generate a control signal for the infrastructure.

In addition, when the application to be executed is an application related to mobility prediction, soft / hard handover fern and inter-cell interference handling, the mobility policy manager of the communication service layer provides the radio control framework through the access control service of the multi-radio interface. The corresponding command can be transmitted to the radio connection manager, and the radio connection manager of the radio control framework can generate a control signal for the infrastructure based on this.

The operation according to the embodiment of the present invention can be implemented as a computer-readable program or code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. In addition, the computer-readable recording medium may be distributed over network-connected computer systems to store and execute computer-readable programs or codes in a distributed manner.

In addition, the computer-readable recording medium may include a hardware device specially configured to store and execute program instructions, such as a ROM, a RAM, and a flash memory. Program instructions may include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine code such as that produced by a compiler.

While some aspects of the invention have been described in the context of an apparatus, it may also represent a description according to a corresponding method, where a block or apparatus corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be represented by features of corresponding blocks or items or corresponding devices. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, programmable computer, or electronic circuit. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.

In embodiments, a programmable logic device (eg, field programmable gate array) may be used to perform some or all of the functionality of the methods described herein. In embodiments, the field programmable gate array may work with a microprocessor to perform one of the methods described herein. In general, the methods are preferably performed by some hardware device.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

Claims (20)

A reconfigurable device that performs a base station (BS) function,
Communication service layer;
A radio control framework on a radio computer;
A multi-radio interface that is an interface between the communication service layer and the radio control framework; And
It includes an infrastructure layer equipped with a radio application for performing the base station function,
The communication service layer,
Request information according to execution of an application related to reconfiguration of a radio access network (RAN) is transmitted to the radio control framework through the multi-radio interface,
The radio control framework,
Based on the request information, and generates a control signal to reconstruct the infrastructure,
The communication service layer and radio control framework constitute a control layer of the RAN architecture, and the communication service layer is controlled through a Northbound interface from an application layer of the RAN architecture.
Reconfigurable device. The method according to claim 1,
The communication service layer,
A reconfigurable device comprising an Administrator and a Mobility Policy Manager. The method according to claim 2,
The manager,
A reconfigurable device that delivers change information of a base station (BS) parameter value to the radio control framework via the multiradio interface. The method according to claim 2,
The mobility policy manager,
A reconfigurable device that delivers information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling to the radio control framework via the multiradio interface. The method according to claim 1,
The radio control framework,
A reconfigurable device comprising a Configuration Manager and a Radio Connection Manager. The method according to claim 5,
The configuration manager,
Reconfigurable device for generating a control signal to reconstruct the infrastructure layer based on the change information of the base station (BS) parameter value received from the communication service layer. The method according to claim 5,
The radio connection manager,
Reconfigurable apparatus for generating a control signal to reconstruct the infrastructure layer based on information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling received from the communication service layer. The method according to claim 1,
The multi-radio interface,
Reconfigurable device that provides Administrator Services and Access Control Services. The method according to claim 8,
The manager service,
And a service that delivers change information of a base station (BS) parameter value between the communication service layer and the radio control framework. The method according to claim 8,
The access control service,
And a service that delivers information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling between the communication service layer and the radio control framework. RAN (Radio Access) of a reconfigurable device including a communication service layer, a radio control framework, a multiradio interface between the communication service layer and the radio control framework, and an infrastructure layer on which radio applications for performing base station functions are mounted. Network) Reconstruction method,
Transmitting request information according to execution of an application related to RAN reconfiguration from the communication service layer to the radio control framework through the multi-radio interface; And
Generating a control signal reconstructing the infrastructure layer based on the request information by the radio control framework,
The communication service layer and radio control framework constitute a control layer of the RAN architecture, and the communication service layer is controlled through a Northbound interface from the application layer of the RAN architecture.
RAN reconstruction method. The method according to claim 11,
The communication service layer,
A method of reconfiguring a RAN, including an Administrator and a Mobility Policy Manager. The method according to claim 12,
The step of delivering request information according to execution of a radio application for performing the base station function from the communication service layer to the radio control framework through the multi-radio interface includes:
And transmitting, by the administrator, change information of a base station (BS) parameter value to the radio control framework through the multiradio interface. The method according to claim 12,
The step of delivering request information according to execution of a radio application for performing the base station function from the communication service layer to the radio control framework through the multi-radio interface includes:
And transmitting, by the mobility policy manager, information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling to the radio control framework through the multiradio interface. . The method according to claim 11,
The radio control framework,
A RAN reconfiguration method comprising a Configuration Manager and a Radio Connection Manager. The method according to claim 15,
Generating a control signal to reconstruct the infrastructure layer based on the request information by the radio control framework,
And generating a control signal for reconfiguring the infrastructure layer based on the change information of a base station (BS) parameter value received from the communication service layer by the setting manager. The method according to claim 15,
Generating a control signal to reconstruct the infrastructure layer based on the request information by the radio control framework,
Generating a control signal reconstructing the infrastructure layer based on information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling received from the communication service layer by the radio connection manager; RAN reconstruction method comprising a. The method according to claim 11,
The multi-radio interface,
A method of reconfiguring a RAN, providing Administrator Services and Access Control Services. The method according to claim 18,
The manager service,
And a service that delivers change information of a base station (BS) parameter value between the communication service layer and the radio control framework. The method according to claim 18,
The access control service,
And a service that delivers information on at least one of mobility prediction, soft / hard handover management, and inter-cell interference handling between the communication service layer and the radio control framework.

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