KR102276983B1 - Hybrid multicast routing wireless sensor information transmission management system and method for providing context-aware flow in multiple radio access technology - Google Patents

Abstract

The present invention relates to a handover operation method for seamless mobility support and efficient network resource management when a handover necessity of a mobile node (MN) is sensed, and AMAP (Advanced Mobility Anchor Point), which is a hierarchical regional mobility management ) is introduced into the FHPMIPv6 (Fast Handover extension for PMIPv6) network, and organic buffer management is performed, which enables systematic buffer management and reduces waste of radio link resources.

Description

HYBRID MULTICAST ROUTING WIRELESS SENSOR INFORMATION TRANSMISSION MANAGEMENT SYSTEM AND METHOD FOR PROVIDING CONTEXT-AWARE FLOW IN MULTIPLE RADIO ACCESS TECHNOLOGY}

The present invention relates to a hybrid multi-routing wireless sensor information transmission management system and method for providing a context-aware flow of a multi-radio access technology for handover between heterogeneous networks.

Recently, with the development of ubiquitous sensor network technology, research on a technology for transmitting information collected from various sensors through a wireless or mobile communication network is being actively conducted. Also, starting with the provision of smart IoT platform services through IoT technology, efforts to realize a ubiquitous and hyper-connected society are progressing beyond the pilot stage to a level that can be commercialized.

In addition, as the number of smart device users is greatly increased according to the development of the mobile communication environment, data usage due to the activation of multimedia streaming services is also continuously increasing. As the demand for such high-quality multimedia convergence content services accelerates, data traffic usage in 2020 is expected to increase by more than 1,000 times compared to 2010.

Accordingly, in order to provide a service with a guaranteed quality of service (QoS) through information collected from various sensors, it is necessary to preemptively solve the problem of an increase in network load due to an increase in traffic. For this, efficient network resource management and mobility support technology through seamless mobility support between heterogeneous networks are required.

As described above, in order to guarantee QoS, MIH (Media Independent Handover) technology is being standardized to facilitate seamless mobility support between heterogeneous networks and efficient network resource management. The MIH technology plays a practical bridge role between L2 (Layer2) and L3 (Layer3) layers, and supports session continuity through interaction between upper and lower layers through information exchange with IS (Information Server). .

However, even now, in addition to the network load increase problem due to the increase in multimedia streaming traffic, the flow mobility problem between heterogeneous networks, the traffic overload problem, and the packet loss problem and situation awareness Traffic problems occurring between various access networks, such as path optimization services, are still technical challenges to be solved.

Korean Patent Publication No. 10-2034842 (“Method and Apparatus for Handover Based on Context in a Heterogeneous Network Environment”) Korean Patent Publication No. 10-1901109 (“Hybrid Convergence Network Management System and Method to Provide Stable Traffic Transmission by Improving Wireless Resource Efficiency”)

The present invention has been devised to solve the above problems, and an object of the present invention is to solve the problem of increase in load due to the transmission of signaling messages that occur when frequent handover requests between heterogeneous networks occur from different network interface environments. It is to provide a handover operating system and method that can proactively determine in advance whether it is for the purpose of performing a session or only for session movement within the same network.

In a handover operation method according to an embodiment of the present invention for achieving the above object, when the need for handover of a mobile node (MN) is detected, a service network (PMAG: Previous Mobile Access Gateway) an information checking step of communicating with a Media Independent Information (MII) server and requesting information on a candidate network (NMAG: New Mobile Access Gateway) adjacent to the mobile terminal; an information providing step of providing, by the service network, information on at least one candidate network to a mobile terminal when receiving at least one candidate network from the MII server; an availability checking step in which the service network communicates with the candidate network to check resource availability; When one candidate network (NMAG 1) is determined among at least one or more candidate networks (NMAG 1 to NMAG N), the service network communicates with the selected candidate network to transmit HI (Handover Intiate) information, and HACK (Handover Acknowledgment) ) resource preparation step for receiving information; and performing a handover in which the mobile terminal receives a packet through the selected candidate network.

In this case, the present invention may further include, after the resource preparation step, a Local Blinding Update step in which the service network communicates with an Advanced Mobility Anchor Point (AMAP) to update the binding of the mobile terminal.

The present invention provides a location update step of updating Binding Cache Entry (BCE) information by transmitting and receiving information between the service network and a Local Mobility Anchor (LMA) server after the local binding update step; and a path optimization step of transmitting and receiving information between the LMA server and the selected candidate network for a routing path optimization operation after the location update step.

In the present invention, in the location update step, the service network and the LMA server transmit and receive FPBU (Fast Proxy Binding Update) and FPBAck (Fast Proxy Binding Acknowledgment) messages to each other, and in the route optimization step, the LMA server and the selected The candidate networks may be configured to transmit and receive Reverse Proxy Binding Update (RPBU) and Reverse Proxy Binding Acknowledgment (RPBA) messages to each other.

In the present invention, when the LMA server and the selected candidate network transmit and receive information in the route optimization step, the selected candidate network may transmit a Router Advertisement (RA) message to the mobile terminal.

Also, in the present invention, when a packet is transmitted from a Correspondent Node before the handover performing step, a buffering operation of the packet is performed in the LMA (Local Mobility Anchor) server and AMAP (Advanced Mobility Anchor Point) to provide the service network. receiving a first buffer management step; and a second buffer management step of performing a buffering operation of packets in the service network and transmitting the packets to the selected candidate network, wherein the selected candidate network transmits the received packet to the mobile terminal.

In a handover operation method according to an embodiment of the present invention for achieving the above object, a service network transmits AP (Access Point) information around a mobile node (MN) to an Inter Access Point Protocol (IAPP) ) to collect information by using; an information providing step of providing, by the service network, the collected AP information to the mobile terminal when a handover necessity of the mobile terminal is detected; a network selection step of selecting one AP from among the APs collected from the mobile terminal or the service network and communicating with a target network including the corresponding AP; a resource preparation step in which the service network communicates with the target network to transmit HI (Handover Intiate) information and receive HACK (Handover Ack.) information; and performing a handover in which the mobile terminal receives a packet through the selected candidate network.

At this time, in the HI information and the HACK information, at least one or more information of a Mobile Node Identifier (MN-ID), a Host Negotiation Protocol (HNP), a Link Layer Identifier (LL-ID), and a Media Independent Handover Function Identifier (MIHF-ID) is included. may be included.

In addition, in the present invention, in the handover performing step, when a packet is transmitted from a counterpart node (Correspondent Node), LMA (Local Mobility Anchor), AMAP (Advanced Mobility Anchor Point) and the selected candidate network are transmitted to the mobile terminal. can be characterized as

The handover operation method of the present invention according to the above configuration has an effect of further reducing radio link resource waste in an overlapping area by transmitting and receiving HI and HACK information between a service network and a selected candidate network prior to notifying the mobile terminal. In addition, maintaining the binding update list on the LMA server and AMAP has the advantage of being configured more efficiently.

In addition, the present invention has the advantage that packet loss can be reduced through more organic and systematic buffer management, and more efficient load balancing management is possible.

1 is a diagram showing rules in a general MIH procedure.
2 is a view showing a handover operation method according to the prior art.
3 is a system configuration diagram according to an embodiment of the present invention.
4 is a diagram illustrating a handover operation method according to an embodiment of the present invention.
5 is a diagram illustrating a handover operation method according to another embodiment of the present invention.
6 is a comparison diagram of handover delay times of the prior art and the present invention.

Hereinafter, a handover operation method according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. Also, like reference numerals refer to like elements throughout.

If there is no other definition in the technical and scientific terms used at this time, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and the subject matter of the present invention is unnecessary in the following description and accompanying drawings Descriptions of known functions and configurations that may be blurry will be omitted.

1 and 2 relate to a conventional method for operating a handover. FIG. 1 is a diagram illustrating a rule in an MIH procedure, and FIG. 2 is a diagram illustrating a method of operating a handover, respectively.

Referring to FIG. 1 , MIH (Media Independent Handover) is largely divided into three types: MN to Network, Network to MN, and Network to Network. And if it is classified as above, it is useful for determining the appropriate protocol according to the starting point and the destination point, and calling the related parameters. Therefore, when executing the MIH-related command, the naming convention must be followed by the rules defined in FIG. 1 shown, and the destination point is limited and used only for remote commands. In addition, FIG. 1 additionally shows the contents of a command parameter generated when a handover request is made according to the MIH. When the mobility of the terminal is directly managed, the selection of the candidate network (MAG: Mobile Access Gateway) is possible by the mobile terminal (MN: Mobile Node), and it is added to the candidate network list through the MIHF (Media Independent Handover Function) service in the network. Inquiries and resource provision requests can be reserved in advance, and handover operation status can be displayed.

In addition, when the mobility of the terminal is managed by the network, the network can not only query the list of resources currently used by the mobile terminal, but also reserve the necessary resources for target candidate networks, and It is also possible to give a command for performing handover to the mobile terminal.

Referring to FIG. 2 , basically, the mobile terminal receives packets through the PMIPv6 component LMA (AAA Server: Authentication Authorization Accounting Server) and the currently provided service network (MAG1). In addition, when the mobile terminal detects the need for handover, information on a neighboring network is acquired through an Information Server (IS). In this case, when performing a network-based handover, the Point of Attachment (PoS) of the service network delivers the [MIH_Net_HO_Candidate_Query Request] message to the mobile terminal to trigger the handover procedure, and the Whether over is performed and appropriate PoS information is received.

In addition, the PoS of the service network transmits a [MIH_N2N_HO_Query_Resource Request] message to several candidate networks to check resource availability of several candidate networks, and the several candidate networks send a response [MIH_N2N_HO_Query_Resource Response] message. By transmitting to the service network, the PoS determines the handover target through the corresponding procedure.

In addition, the PoS of the service network that has determined the handover target through the [MIN_N2N_HO_Query_Resource Response] message exchanges the [MIH_N2N_HO_Commit Request / Response] message with the PoS of the candidate network to request resource provision from the candidate network to be provided in the future. In addition, the candidate network that has received the [MIH_N2N_HO_Commit Request] message can obtain PMIPv6 process information corresponding to the mobile terminal through Authentication Authorization Accounting (AAA) server authentication and store it in a Policy Server (PS).

In addition, the PoS of the service network notifies the mobile terminal of the result according to the handover target determination through the [MIH_Net_HO_Commit Request] message, and receives a response to the result through the [MIH_Net_HO_Commit Response] message. Accordingly, the mobile terminal is able to establish an L2 (Layer2) connection with the PoS of the selected candidate network, so that the PBU (Proxy Binding Update) and PBAck (Acknowledgment) with the LMA to register the location of the mobile terminal and maintain the BCE (Binding Cache Entry) Messages are exchanged. Here, the PMIPv6 client receiving the PBAck message transfers the mobile terminal information obtained from the PS and LMA to the mobile terminal through an RA (Router Advertisement) message.

In addition, the transmitted information is periodically transmitted by RS (Router Solicitation) message, and through RA (Router Advertisement) message, the interface IP address used to connect to the PoS of the current target candidate network is configured. When the corresponding procedure is completed, the mobile terminal can receive packets through the PMIPv6 component LMA and the currently provided service (MAG2). Here, in order to complete all procedures necessary for a handover request, the [MIH_N2N_HO_Complete Request / Response] message for performing the resource release procedure must be exchanged with the network PoS (MAG1) previously provided.

3 and 4 are related to a handover operation method according to an embodiment of the present invention. FIG. 3 is a system configuration diagram, and FIG. 4 is a diagram of a handover operation method, respectively.

Referring to FIG. 3, the configuration and system of the present invention will be described as follows. The MIH according to the present invention plays a practical bridging role between the L2 (Layer2) and L3 (Layer3) layers in order to solve the traffic load problem caused by the explosive increase in data traffic usage and to guarantee QoS (Quality of Service). . Here, in the present invention, information exchange with an information server (IS) can be made to support continuity of a session through interaction between an upper layer and a lower layer. Accordingly, the MIH provides a media-dependent lower layer (IEEE 802.11, IEEE 802.3 (CSMA/CD), IEEE 802.16 (WiMAX), 3GPP) and a media-independent upper layer (IP, Mobile IP) when requesting a handover between heterogeneous networks. , SIP, HIP), SAP (Service Access Points) and three MIHF (Media Independent Handover Function) services will be provided to provide an interactive interface. In this case, the services basically provided by the MIHF include an event service, a command service, and an information service, and the service may play a role of managing and controlling a sub-interface state. Through this, it is possible to provide an interactive service between devices necessary for determining a handover target to support various standard technologies provided by IEEE 802 and optimized handover in a cellular network.

In addition, the present invention provides a mobile terminal, a service network (PMAG: Previous Mobile Access Gateway) that provides a network service before handover to the mobile terminal, and a selected candidate network (NMAG1) that provides a network service after handover: New Mobile Access Gateway 1), can be divided into candidate networks (NMAG1, NMAG2, NMAG3, ..., NMAGn) adjacent to the mobile terminal in a handover process including the selected candidate network. In addition, the selected candidate network uses a target network and a term in parallel for a clearer description. And the present invention introduces AMAP (Advanced Mobility Anchor Point), which is a hierarchical regional mobility management, to FHPMIPv6 (Fast Handover extension for PMIPv6), AAA (Authentication Authorization Accounting) server, LMA (Local Mobility Anchor) server, and MII (Media Independent Information) server ) may further include the AMAP in addition to the server.

With reference to FIG. 4 , the procedure for performing the ACLMIH-FHPMIPv6 transmission mechanism capable of supporting the optimized MIH service between heterogeneous networks in the FPMIPv6 (Fast Handovers for Proxy Mobile IPv6) integrated network will be described as follows.

First, in the present invention, when the mobile terminal (MN) detects the need for handover, it requests information about an available adjacent network from a service network (PMAG) that is currently connected through a Media Independent Handover Function (MIHF). To this end, the service network includes an information confirmation step of exchanging a [MIH_Get_Information Request/Response] message with the MII server.

In the present invention, after the information confirmation step, the service network includes an information providing step of transmitting a [MIH_Net_HO_Candidate_Query Request] message including handover trigger information to the mobile terminal. In this case, in the information providing step, it is determined whether handover is performed or not through a list of heterogeneous networks, and this can be transmitted to LTE-POS of the service network, etc. through the [MIH_Net_HO_Candidate_Query Response] message.

Thereafter, the present invention may include an availability check step in which the service network exchanges [MIH_N2N_HO_Query_Resource Request / Response] messages with several candidate networks in order to check whether network resource availability is available and determine a handover target. Here, the service network may determine the handover target through the [MIN_N2N_HO_Query_Resource Response] message. In addition, [MIH_N2N_HO_Commit Request / Response] messages are exchanged with each other for a resource provision request from the determined or selected candidate network NMAG1, and the corresponding result can be transmitted to the mobile terminal.

At this time, in the present invention, HI (Handover Initiate) and HACK (Handover Ack.) messages are exchanged between the service network and the candidate network NMAG1 to reduce the waste of radio link resources prior to transmission to the mobile terminal. This may include resource preparation. Here, the HI and HACK messages may include a Mobile Node Identifier (MN-ID), a Host Negotiation Protocol (HNP), a Link Layer Identifier (LL-ID), a Media Independent Handover Function Identifier (MIHF-ID), and the like. Here, the present invention may introduce the Advanced Mobility Anchor Point (AMAP), which is a hierarchical regional mobility management, to the FHPMIPv6 network in order to efficiently control the occurrence of an increase in network load due to frequent handover requests in a heterogeneous network. This is an essential element in designing an intelligent network structure through network context awareness, and by performing the location registration procedure before the formation of a two-way tunnel, it helps to reduce the waste of radio link resources in the overlapping area and to maintain the binding update list. do.

In addition, the present invention may further include a Local Blinding Update step in which the service network communicates with an Advanced Mobility Anchor Point (AMAP) to update the binding of the mobile terminal after the resource preparation step. In the present invention, after the bidirectional tunnel is formed, the service network PMAG notifies the LMA server of the location change, between the service network PMAG and the LMA server, FPBU (Fast Proxy Binding Update) and FPBAck (Fast A location update step of exchanging (Proxy Binding Acknowledgment) messages may be included. Here, after checking whether the binding cache entry (BCE) information matches, if it does not match, the corresponding information is updated.

In addition, when the above procedure is completed, the present invention provides the candidate network (NMAG1), RPBU (Reverse Proxy Binding Update) and RPBACK (Reverse), to be serviced in the future in order for the LMA server to perform the Reverse Binding Mechanism, i.e., routing path optimization. Proxy Binding Acknowledgment) messages may include a route optimization step. Here, the corresponding result may be delivered to the Mobile Node (MN) through a Router Advertisement (RA) message. Therefore, the hierarchical location registration procedure for tunneling setup and regional mobility management, which is carried out after handover target determination, not only reduces packet loss when handover is requested, but also enables efficient load balancing management especially when moving within an overlapping area. . In this case, if the corresponding procedure is performed preferentially, the packet order reversal problem may occur. Therefore, packet order control through organic and systematic buffer management according to the management area can be configured.

In addition, the present invention may further include the step of performing a handover in which the mobile terminal receives a packet through the selected candidate network NMAG1. Here, in the present invention, before the handover performing step, when a packet is transmitted from a counterpart node, the LMA (Local Mobility Anchor) server and AMAP (Advanced Mobility Anchor Point) buffering the packet is performed so that the service network A first buffer management step received in the; and a second buffer management step of performing a buffering operation of the packet in the service network and transmitting the packet to the selected candidate network, wherein the selected candidate network transmits the received packet to the mobile terminal. And, in the present invention, when a packet is transmitted from a counterpart node after the handover performing step or the handover performing step, LMA (Local Mobility Anchor), AMAP (Advanced Mobility Anchor Point) and through a selected candidate network It may be transmitted to the mobile terminal.

5 is a handover operation method according to another embodiment of the present invention, and FIG. 5 is a diagram showing a system configuration diagram.

Referring to FIG. 5 , the present invention may include an information collection step in which the service network collects AP (Access Point) information around a mobile node (MN) by using IAPP (Inter Access Point Protocol). .

In addition, the present invention may include an information providing step in which the service network provides the collected AP information to the mobile terminal when a handover necessity of the mobile terminal is detected after the information collection step. Next, the present invention may include a network selection step of selecting one AP from among the APs collected from the mobile terminal or the service network and communicating with a target network including the corresponding AP.

In addition, the present invention may include a resource preparation step in which the service network and the target network exchange HI (Handover Initiate) and HACK (Handover Ack.) messages in order to reduce the waste of radio link resources. Here, the HI and HACK messages may include Mobile Node Identifier (MN-ID), Host Negotiation Protocol (HNP), Link Layer Identifier (LL-ID), Media Independent Handover Function Identifier (MIHF-ID), and the like. Here, the present invention may introduce the Advanced Mobility Anchor Point (AMAP), which is a hierarchical regional mobility management, to the FHPMIPv6 network in order to efficiently control the occurrence of an increase in network load due to frequent handover requests in a heterogeneous network. This is an essential element in designing an intelligent network structure through network context awareness, and by performing the location registration procedure before the formation of a two-way tunnel, it helps to reduce the waste of radio link resources in the overlapping area and to maintain the binding update list. do.

In addition, the present invention may further include a Local Blinding Update step in which the service network communicates with an Advanced Mobility Anchor Point (AMAP) to update the binding of the mobile terminal after the resource preparation step. In the present invention, after the bidirectional tunnel is formed, the service network PMAG notifies the LMA server of the location change, between the service network PMAG and the LMA server, FPBU (Fast Proxy Binding Update) and FPBAck (Fast A location update step of exchanging (Proxy Binding Acknowledgment) messages may be included. Here, after checking whether the binding cache entry (BCE) information matches, if it does not match, the corresponding information is updated.

In addition, when the above procedure is completed, the present invention provides the candidate network (NMAG1), RPBU (Reverse Proxy Binding Update) and RPBACK (Reverse), to be serviced in the future in order for the LMA server to perform the Reverse Binding Mechanism, i.e., routing path optimization. Proxy Binding Acknowledgment) messages may include a route optimization step. Here, the corresponding result may be delivered to the Mobile Node (MN) through a Router Advertisement (RA) message. Therefore, the hierarchical location registration procedure for tunneling setup and regional mobility management, which is carried out after handover target determination, not only reduces packet loss when handover is requested, but also enables efficient load balancing management especially when moving within an overlapping area. . In this case, if the corresponding procedure is performed preferentially, the packet order reversal problem may occur. Therefore, packet order control through organic and systematic buffer management according to the management area can be configured.

In addition, the present invention may further include the step of performing a handover in which the mobile terminal receives a packet through the selected candidate network NMAG1. Here, in the present invention, before the handover performing step, when a packet is transmitted from a counterpart node, the LMA (Local Mobility Anchor) server and AMAP (Advanced Mobility Anchor Point) buffering the packet is performed so that the service network A first buffer management step received in the; and a second buffer management step of performing a buffering operation of the packet in the service network and transmitting the packet to the selected candidate network, wherein the selected candidate network transmits the received packet to the mobile terminal. And, in the present invention, when a packet is transmitted from a counterpart node after the handover performing step or the handover performing step, LMA (Local Mobility Anchor), AMAP (Advanced Mobility Anchor Point) and through a selected candidate network It may be transmitted to the mobile terminal.

6 is a comparative diagram illustrating a handover delay time between the prior art and the present invention in order to show the effects of the handover operation method according to various embodiments of the present invention.

Referring to FIG. 6, the present invention divided intra-domain support and inter-domain support to prove the effectiveness of a design technique for a context-aware optimal transmission technology for integrated management of various access networks. , the delay between MN and CN is shorter than the sum of delays between MN-AMAP, AMAP-LMA, and LMA-CN, and it is assumed that the geographic locations of LMA and AMAP are the same. In addition, when configuring a candidate network interface considering the packet retransmission rate, the problem caused by the lengthening of the router queue was analyzed. As a result of comparative analysis, it was possible to reduce the handover delay time by not performing a separate procedure for routing path optimization when compared to the existing protocol during handover between heterogeneous networks. It is expected that flow mobility for context-aware-based multimedia data traffic load balancing can be provided.

As described above, the present invention has been described with specific details such as specific components and limited embodiment drawings, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above one embodiment. No, various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains.

Claims (7)

When the need for handover of a mobile node (MN) is detected, a service network (PMAG: Previous Mobile Access Gateway) communicates with a Media Independent Information (MII) server, and a candidate network (NMAG: New) adjacent to the mobile terminal Information confirmation step of requesting information on Mobile Access Gateway)
an information providing step of providing, by the service network, information on at least one candidate network to a mobile terminal when receiving at least one candidate network from the MII server;
an availability checking step in which the service network communicates with the candidate network to confirm resource availability;
When one candidate network (NMAG 1) is determined among at least one or more candidate networks (NMAG 1 to NMAG N), the service network communicates with the selected candidate network to transmit HI (Handover Initiate) information, and HACK (Handover Acknowledgment) ) resource preparation step for receiving information;
a Local Blinding Update step in which the service network communicates with an Advanced Mobility Anchor Point (AMAP) to update the binding of the mobile terminal;
a location update step in which the service network and a Local Mobility Anchor (LMA) server transmit and receive information to update Binding Cache Entry (BCE) information;
a path optimization step of transmitting and receiving information between the LMA server and the selected candidate network for a routing path optimization task;
a first buffer management step in which, when a packet is transmitted from a Correspondent Node, a buffering operation of the packet is performed in the LMA server and the AMAP and received in the service network;
a second buffer management step of buffering packets in the service network and transmitting the packets to the selected candidate network, wherein the selected candidate network transmits the received packet to the mobile terminal; and
In the handover operation method comprising a; the mobile terminal receives a packet through the selected candidate network;
The information provision step is
Determines whether to initiate handover through a list of whether to perform handover and heterogeneous networks
In the location update step,
The service network and the LMA server transmit and receive FPBU (Fast Proxy Binding Update) and FPBAck (Fast Proxy Binding Acknowledgment) messages to and from each other,
In the path optimization step,
The handover operation method, characterized in that the LMA server and the selected candidate network transmit and receive Reverse Proxy Binding Update (RPBU) and Reverse Proxy Binding Acknowledgment (RPBA) messages to each other.
delete delete delete According to claim 1,
In the path optimization step,
When the LMA server and the selected candidate network transmit and receive information,
A handover operation method, characterized in that the selected candidate network transmits a Router Advertisement (RA) message to the mobile terminal.
delete delete

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