JP5660435B2 - Cognitive virtual network system - Google Patents

Description

  The present invention relates to a configuration of a communication network, and more particularly to a cognitive virtual network system in which a virtual cognitive radio base station is introduced.

In the new generation network, diversity accommodation and sustainability are important network requirements, and a function to dynamically construct a virtual network with any network architecture and any characteristics regardless of wired or wireless is required.
Here, diversity accommodation is a function that simultaneously realizes technologies and communication methods that cannot normally be realized simultaneously, such as various communication methods, various communication qualities, and various network architectures, in a mutually separated form. Sustainability is a function that smoothly evolves the network itself by smoothly introducing a variety of network architectures to smoothly advance a series of processes from basic design to practical verification.

  Network virtualization technology (see, for example, Non-Patent Document 1) has attracted attention as a basic technology for realizing these. Network virtualization is a technology in which computer resources and network resources are separated using virtualization technology, and a plurality of freely programmable independent virtual networks coexist. The origin of network virtualization technology is PlanetLab (Non-Patent Document 2), and the future Internet (Non-Patent Documents 3 and 4) and network virtualization testbed (Non-Patent Document 5) focusing on network virtualization in Japan, the United States and Europe. Activities related to ~ 7) are active.

However, in large-scale projects such as GENI (Non-Patent Document 5), ORBIT (Non-Patent Document 8), and 4WARD (Non-Patent Document 6) that focus on network virtualization technology, network virtualization in a wireless environment is also considered. However, it is mainly intended for virtualization of specific wireless networks and wireless links (Non-Patent Documents 9 to 13).
There are insufficient studies on virtual network control methods in heterogeneous wireless access environments that will become increasingly heterogeneous in the future, and wired / wireless seamless integrated network resource management. In addition, in order to essentially realize programmability, which is a feature of network virtualization, programmability (reconstructability) at the physical layer (PHY) and link layer (LINK / MAC) level in wireless communication systems. Although required, little has been studied in the context of network virtualization.

  On the other hand, with regard to radio access technology, research and development of heterogeneous type that handles existing radio systems and frequency shared type cognitive radio technology that handles vacant frequencies are proceeding mainly for effective use of frequencies. With cognitive radio, the radio device recognizes the surrounding radio wave environment, and according to the situation, the user can obtain the desired communication capacity by appropriately using radio resources such as frequency bands and time slots without interference. This is a wireless communication technology that performs transmission while effectively using the frequency with the communication quality (Non-Patent Documents 14 and 15). If software radio technology is applied to cognitive radio technology, programmability (reconstructibility) of radio functions including frequency and PHY / MAC can be realized.

The present applicant has also proposed a cognitive radio cloud as an architecture using cognitive radio technology (Patent Documents 1 and 2).
Many portions of this architecture are standardized in the standardization organization IEEE P1900.4. (See Non-Patent Document 16)

In these conventional cognitive radio communication systems, for example, NRM (network reconstruction manager) provided on the cognitive communication network side and TRM (terminal reconstruction manager) provided on the terminal side so as to satisfy the QoS required by the terminal Thus, it is possible to select a wireless access network as a connection destination and to adjust communication parameters between the terminal and the wireless access network.
However, there is no mechanism capable of providing different QoS services to terminals connected to the same radio access network, communicating with different protocols, or flexibly supporting new protocols.

Japanese Patent Publication No. 2009-206933 Japanese Patent Publication No. 2009-206934

Akihiro Nakao. Network Virtualization as Foundation for Enabling New Network Architectures and Applications. IEICE Trans. Communications, E93-B (3): 454-457, 2010. Larry Peterson, Tom Anderson, David Culler, and Timothy Roscoe. A Blueprint for Introducing Disruptive Technology into the Internet. Proc. HotNets-I, October 2002 Andy Bavier, Nick Feamster, Mark Huang, Larry Peterson, and Jennifer Rexford. In Vini Veritas: Realistic and Controlled Network Experimentation.Proc. ACM SIGCOMM’06, September 2006. 4WARD Project.Internet URL http://www.4ward-project.eu/. GENI: Global Environment for Network Innovations. Internet URL http://www.geni.net/. FIRE: Future Internet Research and Experimentation. Internet URL http://cordis.europa.eu/fp7/ict/fire/. Nakao, evolving network virtualization technology, Nikkei Communication, June 2010. D.Raychaudhuri, I.Seskar, MaxOtt, S.Ganu, K.Ramachandran, H.Kremo, R.Siracusa, H.Liu, and M.Singh.Overview of the ORBIT Radio Grid Testbed for Evaluation of Next-generation Wireless Network Protocols. Proc. WCNC'05, March 2005. Gautam Bhanage, IvanSeskar, Rajesh Mahindra, and Dipankar Raychaudhuri.VirtualBasestation: Architecture for an Open Shared WiMAX Framework.Proc.ACMVISA'10, August 2010. Kok-Kiong Yap, Rob Sherwood, MasayoshiKobayashi, TeYuan Huang, Michael Chan, Nikhil Handigol, Nick McKeown, and GuruParulkar.Blueprint for Introducing Innovation into Wireless Mobile Networks.Proc.ACM VISA’10, August2010. Gregory Smith, Anmol Chaturvedi, Arunesh Mishra, and Suman Banerjee.Wireless Virtualization onCommodity 802.11 Hardware.Proc.WiNTECH’07, September 2007. Gautam Bhanage, Dipti Vete, IvanSeskar, and Dipankar Raychaudhuri.SplitAP: Leveraging Wireless Network Virtualization For Flexible Sharing Of WLANs.Proc.IEEE GLOBECOM’10, December 2010. Joachim Sachs and StephanBaucke.Virtual Radio-A Framework for Configurable RadioNetworks.Proc.WICON’08, November 2008. Hiroshi Harada, HomareMurakami, Kentaro Ishizu, Stanislav Filin, H.Hguyen Tran, Y.D.Alemseged, andC.Sun.Research and Development toward Heterogeneous Type and Spectrum SharingType Cognitive Radio Systems.Proc.CrownCom’09, June 2009. Dipankar Raychaudhuri, XiangpengJing, Ivan Seskar, Khanh Le, and Joseph B. Evans. Review: Cognitive RadioTechnology: From Distributed Spectrum Coordination to Adaptive Network Collaboration. Pervasive and Mobile Computing, 4 (3): 278-302, 2008. IEEE P1900.4, “Architectural Building Blocks Enabling Network-Device Distributed Decision Making for Optimized RadioResource Usage inHeterogeneous Wireless Access Networks,” Internet URL http://grouper.ieee.org/groups/scc41/4/index.htm (August 2010 10-day search) Stanislav Filin, KentaroIshizu, Homare Murakami, Hiroshi Harada, Go Miyamoto, H.Hguyen Tran, Shuzo Kato, and Mikio Hasegawa.Dynamic Spectrum Assignment and Access Scenarios, SystemArchitecture, and Procedures for IEEE P1900.4 Management System.Proc.CrownCom'08 , May 2008. Akihiro Nakao, Ryota Ozaki, andYuji Nishida.CoreLab: An Emerging Network Testbed Employing Hosted VirtualMachine Monitor.Proc.ROADS '08, December 2008. Ping Du, Maoki Chen, Ryota Ozaki, Yuji Nishida, and Akihiro Nakao. Port-space Isolation for Multiplexing aSingle IP Address through Open vSwitch. Proc. TridentCom’10, May 2010.

  In addition to the conventional network virtualization technology, the present invention provides (1) wireless access control in a heterogeneous wireless access environment, as a technology that forms the basis of a new generation network that satisfies the above-described diversity accommodation and sustainability. We are aiming to establish wired / wireless network integrated virtualization technology with the following three features: 2) wired / wireless seamless integrated network resource management and (3) wireless PHY / LINK level reconfigurability (deep programmability).

  In this regard, it is considered that the above three functions can be realized by merging both based on the common essential characteristic of network virtualization technology and cognitive radio technology that can be reconstructed. Network virtualization environment is not assumed, and there is no mechanism for coordinating with network virtualization control on the wired side, so these two technologies cannot be simply combined.

  Therefore, the present invention proposes a new platform that suitably combines network virtualization technology and cognitive radio technology, thereby simultaneously accommodating various communication networks and flexibly incorporating a new network architecture to enhance sustainability. An object is to provide a cognitive virtual network system.

The present invention was created in view of the conventional problems, and provides the following cognitive virtual network system.
That is, a wired core network connected to a plurality of physical wireless access networks is used to form a core network composed of at least one of the wired core network itself or a virtual core network virtually configured on the wired core network. On each physical base station of the radio access network, a virtual cognitive radio base station corresponding to one or a plurality of the core networks is configured.
Then, the cognitive communication terminal establishes communication with the virtual cognitive radio base station, thereby enabling connection to a cognitive virtual network including the core network and the virtual cognitive radio base station.
In such a system, one or a plurality of the cognitive virtual networks constituting the cognitive virtual network system can be dynamically reconfigured.

  The core network and the virtual cognitive radio base station constituting the cognitive virtualization network can be reconfigured by dynamic selection.

  The connection method in the wireless access network or the wired core network configuring the above cognitive virtual network may be dynamically reconfigurable.

  In the above cognitive virtualization network system, a network virtualization manager unit configured to control a wired core node on a wired core network and set a virtual core node, control a wireless base station, and set a virtual cognitive wireless base station, and at least A network reconfiguration manager unit that controls the virtual cognitive radio base station and the cognitive communication terminal to set the presence or absence of connection between them or a communication method; a network virtualization manager unit; and the network reconfiguration manager unit; And a cognitive virtualization manager unit that performs control related to the reconstruction of the cognitive virtualization network.

  In the cognitive virtual network system, the physical base station includes a virtual machine execution processing unit that simultaneously executes and processes a plurality of virtual machines (VMs), a wired interface unit that connects to a wired core network, and a cognitive A wireless interface unit that performs wireless communication with the communication terminal, and each virtual machine execution processing unit functions as a virtual cognitive wireless base station in response to an instruction from the network virtualization manager unit, the wired interface unit and the wireless interface The unit may also include a network virtualization control unit that performs control so as to function as each virtual interface corresponding thereto.

  In the above base station configuration, the network reconfiguration manager unit reconfigures the presence / absence of connection or the connection method independently for the plurality of virtual cognitive radio base stations provided in one physical base station Then, at least the switching control with other virtual cognitive radio base stations and the collection of measurement information at the virtual cognitive radio base stations may be performed.

  Cognitive virtualization manager means used in the above cognitive virtualization network system, comprising at least one or more cognitive virtualization manager means that dynamically constitute the cognitive virtualization network system. It can also be provided.

The present invention can also provide a base station of the following cognitive virtual network system.
That is, a virtual machine execution processing unit that executes and processes a plurality of virtual machines (VMs) simultaneously, a wired interface unit that connects to a wired core network, and a wireless interface unit that performs wireless communication with a cognitive communication terminal, Each virtual machine execution processing unit functions as the virtual cognitive radio base station in response to an instruction from the activation manager unit, and the wired interface unit and the wireless interface unit also function as virtual interfaces corresponding thereto. And a network virtualization control unit for controlling the network.

By providing the above configuration, the present invention can propose a new platform that suitably combines network virtualization technology and cognitive radio technology.
Not only the existing wireless system but also a new communication method proposed in the future can be introduced into the platform of the present invention by constructing a cognitive virtual network regardless of wired wireless. They can also be dynamically rebuilt based on cognitive radio technology and can freely start and stop the cognitive virtualization network.
Furthermore, connection methods such as communication protocols and authentication methods can also be dynamically reconfigured, which contributes to the provision of various communication services to users together with the provision of services for cognitive virtual networks.
In the present invention, a new wireless communication system can be introduced by utilizing an unused frequency (white space) on the wireless system side. On the other hand, a new communication method can be introduced on the wired core network side by network virtualization technology. By combining these, "white space working" that introduces a completely new communication method over the wired and wireless is possible for all layers (data formats) from the physical layer to the application layer. "

1 is an overall explanatory diagram of a system of the present invention. It is a block diagram of a host base station (HBS). 1 is an example of a host base station (HBS). The message sequence in the initial construction scenario of a cognitive virtual network is shown.

Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. The embodiment is not limited to the following.
FIG. 1 shows an overall explanatory diagram of the system (1) of the present invention. In this system (1), a plurality of physical radio access networks (10), for example, a mobile phone network (10a), WiFi (registered trademark) (10b), WiMAX (10c), and these radio access networks (10 ) Is connected to the wired core network (20).

The wired core network (20) is a closed network in the case of a cellular phone network or the like, and refers to a dedicated wired network owned by an operator connecting between cellular phone base stations, and in the case of WiFi. As described above, it may refer to a shared wired network such as the Internet owned by another business operator connecting the base station of the wireless access network (10).
The former is a case where the mobile network operator (MNO) and the infrastructure operator (21) managing the wired core network are the same, and the latter is a case where they do not necessarily match.
The wired core network (20) of the present invention includes both of these aspects.

Then, the wired core network (20) is used to form a core network (30) including at least one of the physical wired core network itself or a virtual core network virtually configured on the wired core network. . One or a plurality of wired core networks or virtual core networks may be used, and the core network (30) is configured by one or a combination of both.
As described above, the present invention can use the wired core network as it is, but in the following embodiment, a plurality of virtual core networks, for example, vNetA to C (31) (32) (33) are arranged on the wired core network. An example of the configuration will be described. As a method for constructing the virtual core network on the wired core network, a known method can be used as will be described later.

On the other hand, a virtual cognitive radio base station corresponding to one or a plurality of the core networks (30) is configured on each physical base station (11 to 14 or the like) of the radio access network (10). An embodiment in which the virtual cognitive radio base station is realized by a virtual machine (VM) will be described later, but the virtual cognitive radio base station of the present invention is not limited to this.
For example, multiple cognitive radio base station functions can be started independently on a physical base station, and virtual cognitive radio base stations can be operated and stopped by switching the start / stop state of the program. May be. Further, by using a known virtual interface technology, the virtual cognitive radio base station of the present invention may be created by making it appear that a plurality of cognitive radio base stations exist in a pseudo manner.

  In the present invention, by introducing a virtual cognitive radio base station to each base station, it is not a physical base station when viewed from a cognitive communication terminal or other nodes (however, a physical base station may be visible). ), It appears that there are as many virtual base stations as are operated by the virtual machine. Thus, for example, two or more different virtual cognitive radio base stations can be operated by installing in one physical base station.

In the state shown in the figure, the base station (11) on the mobile phone network (10a) constitutes a virtual cognitive radio base station corresponding to vNetA (31), and the base station (12) corresponds to vNetB (32). To do.
A base station (13) on WiFi (10b) is vNetA (31), another base station (14) is a virtual cognitive radio base station corresponding to vNetA (31), and a virtual cognitive radio corresponding to vNetC (33). Configure with the base station.

  As a result, the cognitive communication terminal (40) can establish communication with the virtual cognitive radio base station, thereby connecting to the cognitive virtual network composed of the core network (30) and each virtual cognitive radio base station. Since the core network (30) is mapped to the physically existing wired core network (20), the cognitive communication terminal (40) can communicate with an existing communication system such as the Internet through the cognitive virtual network. .

  The radio access network is not limited to the existing radio communication system as described above, and performs dynamic spectrum access to the white space and targets all layers from the PHY layer to the upper layer using available frequencies. It is also possible to introduce a new communication method over wired and wireless. In this way, it is an important feature that the new communication method can be flexibly supported.

  In the present invention, the cognitive virtual network can be dynamically reconstructed by reconstructing the core network and the virtual cognitive radio base station. That is, each of the cognitive virtual networks can be started and stopped according to time. For example, vNetA (31) is generated on the wired core network (20) and vNetA ( By generating a virtual cognitive radio base station corresponding to 31), a cognitive virtual network appears. Conversely, if these are stopped, the cognitive virtualization network will disappear.

Since the cognitive virtual network is configured by the combination of the core network (30) and the virtual cognitive radio base station as described above, these selections can be dynamically reconfigured.
For example, among the virtual cognitive radio base stations corresponding to vNetA (31), the virtual cognitive radio base station of one base station (14) is stopped, or the virtual corresponding to vNetC (33) is set on the base station (13). A cognitive radio base station can also be generated.

  Furthermore, the connection method in the wireless access network (10) and the wired core network (20) constituting the cognitive virtual network, for example, a communication method such as a communication protocol and a use band, QoS, an authentication method, etc. are dynamically reconfigured. You can also. In the present invention, since a cognitive virtual network in which wired and wireless are integrated is constructed, a known cognitive radio technology can be applied to the reconstruction method.

A specific configuration for realizing the above cognitive virtual network system will be described below.
First, the network virtualization manager (hereinafter referred to as NVM) (50) will be described. The NVM (50) constructs, sets, and manages virtual core nodes and virtual base stations (51) and (52) for the wired core nodes (22...) And the cognitive radio base stations forming the wired core network (20). I do.
By the action of the NVM (50), a virtual core network constituting the core network (30) of the present invention is formed as an aggregate of virtual core nodes.

  That is, resource management on the wired side of the cognitive virtual network is performed. For example, it corresponds to a PLC (Planet Lab Central) in PlanetLab (Non-Patent Document 2). The NVM (50) is managed by a virtual network operator (VNO).

Next, the network reconstruction manager (hereinafter referred to as NRM) (70) instructs each base station (11...) And the cognitive communication terminal (40) to reconstruct the radio interface (71) (72), Control heterogeneous radio access or dynamic spectrum access.
That is, resource management on the radio side of the cognitive virtualization network is performed. Here, NRM in IEEE1900.4 (Non-Patent Documents 16 and 17) is assumed. The NRM is managed by a virtual mobile network operator (MVNO).

In the present invention, in addition to existing operators such as VNO and MVNO, a cognitive virtualization operator (CVO) for managing a cognitive virtualization manager (hereinafter referred to as CVM) (60) is newly introduced. There is also a feature in doing.
In the CVM (60), control information and management information necessary for control and management of the cognitive virtual network are exchanged at an appropriate timing for each of the NVM (50) and the NRM (70). 61) Perform (62). In response to these information exchanges and instructions, the NVM (50) and the NRM (70) each have an API (Application Programming Interface) that can be executed remotely.

Next, the virtual cognitive radio base station (Virtual Cognitive Base Stateion: vCBS) according to the present invention will be described in detail. FIG. 2 shows the architecture of a physical base station (referred to herein as a host base station) (HBS). For example, assume the configuration of the base station (14) in FIG.
The host base station includes a computer unit (140) composed of a CPU or the like, one or more wired interfaces (150) to (152), and one or more wireless interfaces (160 to 162).

The computer unit (140) is provided with a virtual machine execution processing unit (not shown) for executing processing so as to simultaneously form known virtual machines (VM), and each virtual machine (VM0) is a virtual cognitive according to the present invention. It functions as a radio base station (vCBS) (142...).
Then, upon receiving an instruction from the NVM (50), the network virtualization control unit (NodeManager) (141) of the computer unit (140) manages the computer resources in the node and the wired interfaces (150) to (152), Control and management of virtual machine (VM) such as setting of wired virtual interface.

As described above, since the vCBS (142) is realized as a virtual machine, the host base station (14) can provide a plurality of vCBSs. Each vCBS is recognized as a separate cognitive radio compatible base station from the NRM (70) and is controlled independently.
The wired and wireless virtual interfaces of the vCBS (142) are mapped to the wired interfaces (150) to (152) and the wireless interfaces (160 to 162) of the host base station (14), respectively, using virtual OS technology. The In the illustrated example, the virtual wired / wireless interface corresponding to the vCBS (142) is mapped to the physically existing wired interface (152) and wireless interface (162) via the bridge router unit (144). Yes.

  Note that the number of vCBSs that can be activated simultaneously in the host base station depends on the hardware performance of the host base station, the virtual OS technology to be used, the mapping method between the wireless virtual interface and the wireless interface, etc., and is arbitrary in the implementation of the present invention. It is.

As a virtualization control method, CoreLab described in Non-Patent Documents 18 and 19 is used in this embodiment. The reason for using CoreLab here is that you can take full advantage of the following features of CoreLab.
-Hosted VMM type Linux KVM and resource container type Open VZ are supported as virtual OS technology, and virtualization technology can be used properly according to usage.
-The mapping method between the physical interface and the virtual interface can be flexibly selected in the host OS.
-Supports multi-home connection.
・ Routing for each VM can be set individually.
-NVM (CoreLab Central) has an API that allows remote control of the virtual core network.

  By using Hosted VMM, a fully virtualized method, vCBS can maintain its own kernel independent of the host base station, and introduce device drivers, communication protocols, and wired / wireless network control methods created by users Is possible.

  As the wireless interface (160 to 162), a general-purpose wireless network interface card (NIC) compatible with IEEE802.11 that cannot be reconfigured may be used, or a wireless NIC that can be reconfigured by software wireless technology and FPGA may be used. . Both can be provided.

The feature of vCBS (142) is that it is virtualized including the functions of all cognitive radio base stations. The vCBS (142) and the NRM (70) perform signaling defined by IEEE1900.4.
The CBS reconstruction manager (CBSRM) (146), the CBS reconstruction controller (CBSRC) (145), and the CBS measurement collector (CBSMC) (147) are cognitive radio base station functions defined by IEEE 1900.4a. CBSRM (146) performs reconstruction instruction reception from NRM (70), heterogeneous radio access switching control, notification of measurement information to NRM, and the like based on IEEE1900.4a. The CBSRM (146) manages setting information of the radio interface (162) of the host base station (14). The CBSRC (145) receives the instruction from the CBSRM (146) and sets the wireless interface (162) of the host base station (14). In addition, the CBSRC (145) also sets the basic functions of the radio base station (user authentication, encryption method, channel setting, etc.) as necessary. Finally, the CBSMC (147) periodically acquires the statistical information of the radio interface (162) of the host base station (14) and notifies the CBSRM (146).

  However, in order to enable the reconfiguration of the wireless interface (162) by the CBSRC (145), a setting command relay function for directly setting the wireless interface (162) from within the virtual machine, as described later, or A PCI passthrough function or the like that directly shows the wireless interface (162) to the virtual machine is required.

The bridge router function (144) connects L2 and L3 between the virtual interfaces in the vCBS (142). Data relay is performed in L2 (frame) or L3 (packet) in vCBS. As a result, the host base station (14) can be operated as an L2 / L3 mode radio base station.
In addition, the host base station has a basic function (Wireless AP) (143) of a known radio base station.

  As described above, the virtual cognitive radio base station is virtualized including all functions of the cognitive radio base station. Each base station is individually managed by the NRM (70). When a service such as MVNO is assumed, the cognitive virtualization network has a form in which a plurality of vCBSs are connected to one vNet.

Here, a more detailed embodiment of the host base station will be described. The hardware feature of this embodiment shown in FIG. 3 is that it has a two-stage configuration of a reconfigurable wireless system (RWS) (170) having an FPGA-based NIC and a host base station (14).
The host base station (14) includes a plurality of wireless interfaces and wired interfaces, and can perform various mappings between virtual interfaces and physical interfaces.

  The host base station (14) has three IEEE 802.11b / g interfaces (161) to (162) employing three Atheros (registered trademark) chips, and five GbE interfaces (including control and management interfaces). 153) (154) (155). With this model, the host base station (14) can realize driver-level programmability using a Madwifi / HAL (Hardware Abstraction Layer) driver and kernel-level programmability by CoreLab.

The CoreLab control framework is also used for wired / wireless integrated resource control and user management. The host base station (14) employs the x86 architecture and Linux (registered trademark) with emphasis on versatility.
The RWS (170) has an FPGA-based reconfigurable wireless interface (171) and two GbE interfaces (172) (173). One of the GbEs is a dedicated GbE interface (173) for reconstructing the FPGA (174) from the host base station (14) side.

The logic of the wireless PHY (176) and the wireless MAC (175) is written in the FPGA (174). The MAC (175) further includes an AP mode function of IEEE802.11b / g and functions as a wireless LAN base station by itself. In this case, the wireless AP basic function of the host base station (14) is disabled.
The RWS (170), like the host base station (14), adopts x86 architecture and Linux.

  In addition to the ISM band, the RWS (170) includes one set of RF modules (177) that are compatible with the 2.5 GHz band assuming WiMAX. The CPU in the RWS (170) is also used to improve the performance of the MAC (175) mounted on the FPGA (174).

  On the other hand, the software features of the base station are the new introduction of the sdrconfig program and the use of CoreLab. sdrconfig is a program that performs on-the-fly logic writing and setting for FPGA-based NICs from within vCBS with the same usability as ifconfig and iwconfig.

Next, an operation scenario by each operator using the cognitive virtual network system according to the present invention will be described. FIG. 4 is an example of a message sequence in the initial construction scenario of the cognitive virtualization network. Of course, the scenario and sequence in the present invention are not limited to this.
A service infrastructure request from the service provider (80) to the CVO (CVM) (60), that is, a request to create a cognitive virtual network (1: Req_Infra) is used as a trigger, and CVO (CVM) (60) ) And MVNO (NRM) (70), respectively, request vNet construction and vCBS / wireless terminal setting.

  The CVO (CVM) (60) requests the host base station information (2: Req_HBSInfo) from the MVNO (NRM) (70) to select the host base station for constructing the vCBS, and the MVNO (NRM) (70 ) Is notified (3: Res_HBSInfo).

  From here onwards, there is a sequence related to network virtualization. When a request for vNet construction (4: Req_VN) is sent from CVO (CVM) (60) to VNO (NVM) (50), VNO (NVM) (50) received this Instructs the wired core network of the MNO / infrastructure provider (21) to create a virtual wired node / core network (5: Req_Resource) and creates (6: Res_Resource).

Around this time, the VNO (NVM) (50) instructs the host base station (14) to generate the virtual cognitive radio base station (142) (7: Create_vCBS).
Thus far, network virtualization according to the present invention is completed.

  Next, VNO (NVM) (50) notifies the list of generated vCBS to CVO (CVM) (60) (8: List_vCBS), and CVO (CVM) (60) to MVNO (NRM) (70) The list is notified (9: List_vCBS), and the virtual cognitive radio base station in which the NRM (70) exists can be recognized.

After the notification of the vCBS list, the MVNO (NRM) (70) instructs the vCBS (142) to set and reconfigure the connection method and the like (10: Req_Config) (11: Res_Config) by a known cognitive radio technology. Notification of completion of preparation (12: Ready_vCBS) to CVO (CVM) (60) and instruction for setting and reconfiguration of connection method for cognitive communication terminal (40) (14: Req_Config) (15: Res_Config) To do.
On the other hand, the CVO (CVM) (60) notifies the service provider (80) that the cognitive virtualization network is ready (13: Res_Infra).

Next, in the case of a change in the wireless communication environment, MVNO (NRM) (70) is switched from CVO (CVM) (60) to the switching destination, triggered by detection of wireless terminal mobility and frequency congestion by vCBS (142). It is also possible to request the construction of a cognitive virtual network corresponding to different wireless communication systems.
On the contrary, for the purpose of effective use of frequency and reduction of power consumption, it is also possible to consolidate wireless terminals into one wireless communication system and shut down other wireless communication systems.

When the virtual environment changes, triggered by new allocation or release of network resources or frequencies, VNO (NVM) (50) increases or decreases the allocated resources for a specific cognitive virtual network, and VNO (NVM) ( 50) can request CVO (CVM) (60) to reconstruct the radio access that can be accommodated by the allocated resource.
Similarly, similar processing can be performed when congestion occurs in the core network, virtual router migration, or link disconnection.

For the convenience of explanation, the configuration of the present invention is illustrated such that each function of NVM (50), CVM (60), and NRM (70) is implemented in a separate device. It can also be provided on an apparatus that is combined and integrated as appropriate.
Moreover, although VNO, CVO, and MVNO are given as examples of operators suitable for managing them, the present invention is not limited to these, and each operator may provide two or more services. It may be operated by a completely different business.

As described above, the present invention provides a wired / wireless network integrated cognitive virtualization platform that enables construction, control, management, and provision of a cognitive virtualization network.
In FIG. 1, the platform of the present invention behaves as a virtual network operator for the service providers (81) to (83) and the infrastructure operator (21).
Since one cognitive virtualization network is assigned to one service provider or one service, service providers can enjoy the benefits of network virtualization technology as they are, introduce new communication protocols specialized for services, It is possible to arbitrarily set communication quality and provide a service using a virtual network on demand.

1 Virtual Cognitive Network System 10 Wireless Access Network 11-14 Wireless Base Station 20 Wired Core Network 21 MNO / Infrastructure Operator 22 Wired Node 30 Core Network 31 vNetA
32 vNetB
33 vNetC
40 Cognitive communication terminal 50 NVM
60 CVM
70 NRM
81 Service Provider A
82 Service Provider B
83 Service Provider C

Claims (8)

Using a wired core network connected to a plurality of physical wireless access networks, and configuring a virtual core network virtually configured on the wired core network,
On the physical base stations of the wireless access network, configure the virtual cognitive radio base station corresponding respectively to one or more of the virtual core network,
A cognitive virtual network system in which a cognitive communication terminal can connect to a cognitive virtual network including the virtual core network and the virtual cognitive radio base station by establishing communication with the virtual cognitive radio base station. And
A network virtualization manager unit configured to control a wired core node on the wired core network to set a virtual core node and to control the base station to set a virtual cognitive radio base station;
A network reconfiguration manager unit that controls at least the virtual cognitive radio base station and the cognitive communication terminal to set the presence or absence of communication between them or a communication method;
A cognitive virtualization manager unit that controls at least the reconfiguration of the cognitive virtual network to the network virtualization manager unit and the network reconstruction manager unit;
With
A cognitive virtual network system, wherein one or a plurality of the cognitive virtual networks constituting the cognitive virtual network system can be dynamically reconfigured.   In the cognitive virtual network system,
  The cognitive virtualization manager unit receives a notification of the base station information from the network reconfiguration manager unit, and the network virtualization manager unit transmits a virtual core network on the wired core network based on the base station information. As well as instructing
  The network virtualization manager unit sets the virtual cognitive radio base station in the base station
  The cognitive virtual network system according to claim 1. The virtual core network and the virtual cognitive cognitive virtualized network system according to claim 1 or 2 to allow for reconstruction by dynamic selection of the radio base station constituting the cognitive virtualized network. The cognitive virtual network system according to any one of claims 1 to 3, wherein a connection method in the radio access network or the wired core network constituting the cognitive virtual network can be dynamically reconfigured. In the cognitive virtual network system,
The physical base station is
A virtual machine execution processing unit that simultaneously executes a plurality of virtual machines (VMs);
A wired interface unit connected to the wired core network;
A wireless interface unit for performing wireless communication with the cognitive communication terminal;
In response to an instruction from the network virtualization manager unit, each virtual machine execution processing unit functions as the virtual cognitive radio base station, and the wired interface unit and the wireless interface unit also serve as virtual interfaces corresponding thereto. A cognitive virtualization network system according to any one of claims 1 to 4, further comprising: a network virtualization control unit that performs control so as to function. The network reconstruction manager unit independently reconstructs the presence / absence of a connection or a connection method for the plurality of virtual cognitive radio base stations provided in one physical base station, and another virtual cognitive The cognitive virtualization network system according to claim 5, wherein at least switching control with a radio base station and collection of measurement information at the virtual cognitive radio base station are performed. An apparatus provided with a cognitive virtualization manager unit provided in the cognitive virtualized network system according to any of the claims 1 to 6,
The cognitive virtual network system is
Using a wired core network connected to a plurality of physical wireless access networks, and configuring a virtual core network virtually configured on the wired core network,
On the physical base stations of the wireless access network, configure the virtual cognitive radio base station corresponding respectively to one or more of the virtual core network,
The cognitive communication terminal establishes communication with the virtual cognitive radio base station, thereby enabling connection to a cognitive virtual network composed of the virtual core network and the virtual cognitive radio base station,
An apparatus comprising cognitive virtualization manager means for dynamically reconstructing at least one or a plurality of the cognitive virtualization networks constituting the cognitive virtualization network system. A physical base station provided in cognitive virtualized network system according to any of the claims 1 to 6,
A virtual machine execution processing unit that simultaneously executes a plurality of virtual machines (VMs);
A wired interface unit connected to the wired core network;
A wireless interface unit for performing wireless communication with the cognitive communication terminal;
In response to an instruction from the network virtualization manager unit, each virtual machine execution processing unit functions as the virtual cognitive radio base station, and the wired interface unit and the wireless interface unit also serve as virtual interfaces corresponding thereto. A base station of a cognitive virtual network system, comprising: a network virtualization control unit that performs control so as to function.

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