KR20170057844A - Methods and apparatus for providing mobility in ethernet network - Google Patents

Abstract

Disclosed are a method and an apparatus for providing the mobility in an Ethernet network. An Ethernet switch according to an embodiment receives an Ethernet frame through a port of the Ethernet switch, and transmits the Ethernet frame to the upper Ethernet switch through a root port of the Ethernet switch based on whether the destination address of the Ethernet frame is recorded on the forwarding table.

Description

[0001] METHODS AND APPARATUS FOR PROVIDING MOBILITY IN ETHERNET NETWORK [0002]

The present invention relates to an Ethernet network, and more particularly, to a method and apparatus for achieving mobility in an Ethernet layer of an Ethernet network.

As a technology related to a packet-based mobile network, there are 3GPP Evolved Packet Core (EPC) mobile communication network, IEEE 802.11 WiFi, IEEE 802.16e Mobile WiMAX, and IEEE 802.1 Bridge Network. The 3GPP EPC is a core network structure of a mobile communication network and constitutes a GTP (GPRS Tunneling Protocol) based tunneling network. The 3GPP EPC is composed of a Packet Data Network (PDN) Gate Way (PGW) And the transmission path is composed of two GTP tunnels. However, it is required to improve the current GTP tunnel type 3GPP EPC structure in which all the traffic is pushed to the PGW according to the increase of the mobile bandwidth and the decrease of the delay time.

IEEE 802.11 WiFi and IEEE 802.16e Mobile WiMAX are both Ethernet based wireless MAC technologies, but WiFi AP (Access Point) and WiMAX BS (Base Station) operate as an anchor point of IP mobility and utilize IP mobility So that the mobility of the Ethernet network is not required. When the coverage of the AP and the BS is reduced to increase the capacity per unit area, network mobility is required to effectively provide a network path change that occurs locally and frequently.

In the IEEE802.1 bridge network, since only a fixed terminal is connected, a moving function is not designed. The Bridge Protocol Data Unit (BPDU) used to control the bridge (Ethernet switch) node is used to realize protocol such as STP (Spanning tree Protocol) and RSTP (Rapid STP) corresponding to the topology change of the Ethernet network Respectively.

In one embodiment, when the mobile terminal moves within the Ethernet network, it intends to realize mobility so that seamless handover can be performed between the Ethernet switches without protocol processing of the IP layer.

One embodiment utilizes the mobility of the Ethernet network to connect the wireless MACs to the IEEE 802.1 Ethernet network.

A method of providing mobility of an Ethernet switch according to an exemplary embodiment includes receiving an Ethernet frame through a port of the Ethernet switch; And transmitting the Ethernet frame to an upper Ethernet switch through a root port of the Ethernet switch based on whether a destination address of the Ethernet frame is recorded in a forwarding table.

According to one embodiment, when the upper Ethernet switch is a root switch, the root switch may discard the Ethernet frame based on whether the destination address of the Ethernet frame is recorded in the forwarding table, the Ethernet frame may be broadcasted through the designated ports by changing the source address to reflect the reflective frame.

A method of providing mobility according to an embodiment includes receiving an Ethernet frame in which a source address indicates a reflection frame; Omitting learning of the source address; And wherein the source address is transmitted to the Ethernet frame through the designated ports other than the root port based on whether the destination address of the Ethernet frame indicating the reflection frame is recorded in the forwarding table, The method comprising the steps of:

A method of providing mobility according to an embodiment includes receiving a path setting control signal including an Ethernet address of a terminal; Recording the Ethernet address in the forwarding table based on whether the Ethernet address is recorded in the forwarding table and recording the port on which the routing control signal is received to an output port corresponding to the Ethernet address; And transmitting the routing control signal to the upper Ethernet switch via the root port based on the Ethernet address.

The method of providing mobility according to an exemplary embodiment may further include updating the output port to a port where the routing control signal is received when an output port corresponding to the Ethernet address is recorded in the forwarding table .

According to an embodiment, the step of transmitting the routing control signal may include: when an output port corresponding to the Ethernet address is recorded in the forwarding table and the output port is a port on which the routing control signal is received, And transmitting a path setting control signal.

A method for providing mobility according to an exemplary embodiment of the present invention includes generating an uplink downlink control signal when an output port corresponding to the Ethernet address is recorded in the forwarding table and the output port is different from the port on which the routing control signal is received ; And transmitting the path downlink erasure control signal to the lower Ethernet switch through the output port, wherein the path setup control signal is generated by the wireless terminal with the nerve connected by the handover, The path downlink erasure control signal includes the Ethernet address and the Ethernet address of the wireless terminal as the neuron and the Ethernet frame to be transmitted to the terminal can be stored in the buffer of the wireless terminal with the nerve.

According to one embodiment, when the upper Ethernet switch that has received the routing control signal is a root switch, the root switch determines whether the Ethernet address is recorded in the forwarding table of the root switch, The Ethernet address may be written in the forwarding table of the router and the transmission of the routing control signal may be terminated.

A method for providing mobility according to an embodiment includes receiving a path uplink erasure control signal including an Ethernet address of a terminal; And deleting the output port from the forwarding table when the output port corresponding to the Ethernet address is recorded in the forwarding table and transmitting the path uplink erasure control signal to the upper Ethernet switch through the root port .

According to an embodiment, when the upper Ethernet switch receiving the path uplink erasure control signal is a root switch, when the output port corresponding to the Ethernet address is recorded in the forwarding table of the root switch, It is possible to delete the output port recorded in the forwarding table of the root switch and terminate the transmission of the path uplink erasure control signal.

According to one embodiment, the path uplink erasure control signal is generated by a caliber radio terminal disconnected from the terminal, and includes the Ethernet address, and an Ethernet frame to be transmitted to the terminal is transmitted to the callee wireless terminal May be stored in a buffer of the device.

A method of providing mobility according to an exemplary embodiment includes receiving a path downlink erasure control signal including an Ethernet address of a terminal; Discarding the path downlink erasure control signal when the port on which the path downlink erasure control signal is received is a designated port; And transmitting the path downlink erasure control signal to the lower Ethernet switch when the port on which the path downlink erasure control signal is received is a root port.

According to an embodiment, when the output port corresponding to the Ethernet address is recorded in the forwarding table, the step of transmitting the path downlink erasure control signal may include transmitting the path downlink erasure control signal through the output port, And deleting the output port from the forwarding table.

According to an embodiment, the path downlink erasure control signal may further include an Ethernet address of the wireless terminal, the Ethernet frame being transmitted to the terminal through a nerve to which the terminal is connected by handover, Wherein the wireless terminal transmits the received Ethernet frame to the terminal when the source address of the Ethernet frame is changed to a reflection frame and transmits the Ethernet frame to the terminal through the retransmission completion control Signal is received, the Ethernet frame stored in the buffer is transmitted to the terminal, and the retransmission completion control signal may be generated by the wireless terminal with a diameter disconnected from the terminal.

According to one embodiment, the path downlink erasure control signal is received by a caliber radio terminal disconnected from the terminal, an Ethernet frame to be transmitted to the terminal is stored in a buffer of the caliber radio terminal, Wherein the caliber radio terminal apparatus changes the source address of the Ethernet frame stored in the buffer to indicate a reflection frame and transmits the Ethernet frame with the source address changed to the terminal based on the path downlink erasure control signal, When the Ethernet frame stored in the buffer is transmitted, the terminal generates a retransmission completion control signal including the Ethernet address and transmits the retransmission completion control signal to the wireless terminal through the nerve connected by the handover.

A method for providing mobility according to an embodiment includes receiving a retransmission completion control signal including an Ethernet address of a terminal; And transmitting the retransmission completion control signal based on a destination address included in the retransmission completion control signal, wherein the retransmission completion control signal is generated by a calibrated radio terminal device disconnected from the terminal , The destination address may include the Ethernet address of the wireless end device as a nerve to which the terminal is connected by handover.

A method of providing mobility of a wireless terminal according to an exemplary embodiment of the present invention includes generating a routing control signal including an Ethernet address of the terminal based on whether the terminal is connected to the terminal by handover; Storing an Ethernet frame to be transmitted to the terminal in a buffer; And transmitting the routing control signal to an Ethernet switch.

According to another embodiment of the present invention, there is provided a method of providing mobility, the method comprising: transmitting the received Ethernet frame to the terminal when receiving an Ethernet frame whose source address is changed to a reflection frame; And transmitting an Ethernet frame stored in the buffer to the terminal when receiving a retransmission completion control signal including the Ethernet address, wherein the retransmission completion control signal is transmitted to the terminal through a calibrated wireless terminal May be generated by the device.

A method for providing mobility according to an exemplary embodiment of the present invention includes: generating a path uplink erasure control signal including an Ethernet address of the disconnected terminal based on whether a connection with the terminal is disconnected; And storing an Ethernet frame to be transmitted to the disconnected terminal in a buffer.

According to an exemplary embodiment of the present invention, there is provided a method of providing mobility, comprising: changing a source address of an Ethernet frame to be transmitted to the disconnected terminal to indicate a reflection frame; Transmitting the Ethernet frame in which the source address is changed to the disconnected terminal; Generating a retransmission completion control signal including the Ethernet address of the terminal disconnected; And transmitting the retransmission completion control signal to the wireless terminal through the nerve connected by the handover by the terminal, wherein the destination address of the retransmission completion control signal includes an Ethernet address of the wireless terminal, .

In one embodiment, when the mobile terminal moves within the Ethernet network, mobility can be realized so that seamless handover can be performed between the Ethernet switches without protocol processing of the IP layer.

One embodiment utilizes the mobility of the Ethernet network to connect the wireless MACs to the IEEE 802.1 Ethernet network.

1 is a diagram illustrating an Ethernet network according to an exemplary embodiment of the present invention.
2 is a diagram for explaining a cell-based mobile communication network and an Ethernet network according to an embodiment.
3 is a diagram illustrating a method of providing mobility of an Ethernet network according to an embodiment.
4 is a diagram for explaining an operation of changing an Ethernet frame according to an embodiment.
5 is an exemplary diagram illustrating a frame structure of a control signal according to an embodiment.
6 is an exemplary diagram illustrating a frame structure of a control signal according to an embodiment.
7 is a view for explaining the operation of the Ethernet network according to an embodiment.
8 is a flowchart illustrating an operation of path setting and path uplink erasure according to an embodiment.
9 is a view for explaining the operation of the Ethernet network according to an embodiment.
10 is a view for explaining the operation of an Ethernet network according to an embodiment.
11 is a view for explaining the operation of the Ethernet network according to an embodiment.
FIG. 12 is a flowchart for explaining the operation of path uplink deletion, routing, downlink deletion, and retransmission completion according to an embodiment.
13 is a diagram for explaining a method of connecting terminals to an Ethernet network according to an embodiment.
14 is a diagram for explaining a method of connecting terminals to an Ethernet network according to an embodiment.
15 is a diagram for explaining a method of connecting terminals to an Ethernet network according to an embodiment.
17 is a diagram for explaining a method of configuring a mobile network according to an embodiment.
18 is a view for explaining an aspect in which an Ethernet network according to an embodiment accommodates another network.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

The concept of the present invention has been described in the above-mentioned section " Means of Solving the Problem "and based on the described concept, it will be understood by those skilled in the art that the present invention can be easily understood and reproduced through the preferred embodiments described with reference to the accompanying drawings. And will be described in detail.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The terms used throughout the specification of the present invention have been defined in consideration of the functions of the embodiments of the present invention and can be sufficiently modified according to the intentions and customs of the user or operator. It should be based on the contents of.

One embodiment is an Ethernet switch protocol for dynamic setting, discarding, and changing of the transmission path of the Ethernet frame (packet) in the Ethernet network and the "Broadcast after Route" algorithm for realizing Ethernet network mobility. Bridge Protocol Data Unit). According to the "Broadcast after Route from Upstream" algorithm, if the destination address (DA) of the received Ethernet frame is not recorded in the forwarding table, the Ethernet switch transmits it to the upper Ethernet switch through the root port, You can let the switch find the destination address. Accordingly, the "broadcast from the route after searching up" algorithm can prevent the inefficiency of discarding the corresponding Ethernet frame or broadcasting traffic to all the ports. According to the "Upstream Search Route to Route" algorithm, if the upper Ethernet switch can not find the destination address, the Ethernet frame can finally reach the root switch. The root switch can broadcast an Ethernet frame over all ports including the receive port if the destination address of the Ethernet frame is not recorded in the forwarding table. In order to prevent confusion by the learning of the source address (SA), the root switch transmits a source address (SA) of the Ethernet frame to be broadcast to a special address (Reflected Frame Address : RFA), so that the Ethernet frame can be broadcast.

An Ethernet switch can receive an Ethernet frame with a source address of RFA. An Ethernet switch can discard an Ethernet frame if the port on which the Ethernet frame is received is not the root port. The Ethernet switch can perform processing according to the destination address when the port on which the Ethernet frame is received is the root port. An Ethernet switch can transmit an Ethernet frame according to the forwarding rule when the destination address of the Ethernet frame is recorded in the forwarding table. An Ethernet switch can broadcast an Ethernet frame over all but the root port if the destination address of the Ethernet frame is not recorded in the forwarding table. When the terminal receives the Ethernet frame, it does not perform processing related to the source address. The terminal can ignore the source address. The "broadcast after route search" algorithm can minimize the broadcast of the Ethernet frame. According to the "broadcast on route after searching up" algorithm, the destination address can be recorded only on the forwarding tables of the Ethernet switches on the route to the destination terminal and the root switch, without the destination address being written to the forwarding tables of all the Ethernet switches And a shortest path for transmitting an Ethernet frame from an arbitrary position to a destination terminal may be generated. The "broadcast after route search" algorithm minimizes the update of the forwarding table of the frame (packet) broadcast and the Ethernet switch to provide delivery of frames (packets) over the shortest path, Can be reduced.

One embodiment proposes four types of Ethernet switch control signals for "end-to-end path control " so that routing and deletion changes for the delivery of Ethernet frames can be made quickly. One embodiment of the present invention proposes a buffering and retransmission technique to prevent loss of an Ethernet frame during a handover process. According to an embodiment, since a state where a terminal is connected to a network and disconnected is immediately reflected in the network, a path of a terminal connected to or disconnected from the network can be immediately set or deleted. In one embodiment, the delay time to the network in the handover process of the UE can be reduced, and the loss of the Ethernet frame can be prevented, thereby providing seamless handover. One embodiment enables communication by "establishing only a path between a terminal and a root switch ". One embodiment employs a spanning tree structure of an Ethernet network and a "broadcast on route after searching" algorithm to provide communication in a manner of "establishing only a path between a terminal and a root switch ". According to one embodiment, the shortest path can be dynamically set in the Ethernet network according to the movement of the terminal. One embodiment may provide low delay communication over the shortest path by minimizing packet loss even when the terminal moves.

One embodiment proposes a method for integrating wired access such as IEEE802 wireless MAC, EPON / GPON, etc., such as 3GPP RAN, WLAN, etc., to an Ethernet network employing the above-described mobility providing method. Three schemes are proposed. The first scheme is applied to IEEE wireless MACs such as WiFi and WiMAX, and directly connects wireless terminals in the Ethernet layer by mutual conversion between MAC frames. The second scheme is applied to non-IEEE 802.3 MAC such as 3GPP wireless MAC such as LTE, and establishes a predetermined relationship between the terminal / subscriber ID and the MAC address. In this case, an Ethernet network according to one embodiment can be applied because the wireless terminal is logically connected directly to the Ethernet layer. The third scheme is an overlay scheme of "IEEE802.3 MAC over wireless MAC ", which uses an IEEE802.3 MAC frame as an SDU on a wireless MAC, thereby extending the Ethernet layer beyond any wireless MAC. These three methods directly connect the wireless MAC to the Ethernet layer of the Ethernet network. If the specification of the wireless MAC is determined in a manner of accommodating the IEEE802.3 MAC frame, the wireless terminal can be connected to the Ethernet network without applying the above- Can be connected. One embodiment can be used with the basic functions of an Ethernet network, and can be realized through software changes, so that it can be applied to an already installed Ethernet network.

1 is a diagram illustrating an Ethernet network according to an exemplary embodiment of the present invention.

Referring to FIG. 1, an Ethernet network constitutes a network topology of a tree structure having a root switch (root switch) 1100 as a top vertex. The Ethernet network may include Ethernet switches 1 through 9 (1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 and 1900). The Ethernet network may be connected to fixed terminals 3300 and 4000 and mobile terminals 3100, 3200 and 5000. The mobile terminals 3100, 3200 and 5000 are connected to the Ethernet switches 1600, 1700, 1800 and 1900 through wireless APs (W-APs) 2100, 2200, 2300 and 2400. Wireless AP (2100, 2200, 2300, 2400) may be a WiFi, 3GPP eNodeB, and the next generation of ^{5G-AP (5 th Generation Access} Point) and various radio RAN (Radio Access Network) base station or a wireless network access point. Here, the wireless APs 2100, 2200, 2300, and 2400 may be wireless termination devices. 1, a mobile node (MN) 5500 of an Ethernet network according to an exemplary embodiment maintains communication with a wireless terminal CN1 3100, a CN2 3200, and a wired terminal CN3 3300, To the W-AP 3 (2300). The mobile node (MN) 5500 is disconnected from the W-AP 2 (2200) and can be connected to the W-AP 3 (2300) by handover. The Ethernet network may update the aperture of the mobile terminal (MN) 5500 neurotically where W-AP 2 2200 is a calibrated wireless termination device and W-AP 3 2300 is a nerve- Device.

2 is a diagram for explaining a cell-based mobile communication network and an Ethernet network according to an embodiment.

Referring to FIG. 2, in the cell-based mobile communication network, since the communication path is set around the PGW that is the IP anchor, all traffic must pass through the PGW, traffic can be concentrated, traffic load on the transmission network is large, The delivery time may be delayed. However, in a cell-based mobile communication network, a path is set through updating of packet path information at several points such as a PGW, an SGW, and an eNodeB, and a handover can be performed.

Referring to FIG. 2, a path can be established through an Ethernet network (Ethernet mobile network). When the mobile path is established through the Ethernet-based network, the communication channel is set to the most efficient path generated by the Ethernet network. Therefore, since the traffic burden on the network is reduced and the Ethernet frame (packet) Can be minimized. This feature can be effectively utilized to realize a network service requiring a short delay time such as a Vehicle-to-Infrastructure (V2I). According to one embodiment, a method for realizing an Ethernet network is provided.

3 is a diagram illustrating a method of providing mobility of an Ethernet network according to an embodiment.

An Ethernet network according to an embodiment can provide mobility through an "uplink-after-route broadcast" algorithm and an "only route between terminal and root switch" algorithms. The Ethernet switch can receive Ethernet frames. The Ethernet switch can discard Ethernet frames or broadcast over all ports if the destination address of the received Ethernet frame (packet) is not recorded in the forwarding table (destination address mismatch frame). The Ethernet frame according to an exemplary embodiment may be expressed as a packet according to a network layer.

According to the "broadcast after route search" algorithm, the Ethernet switch can transmit the received Ethernet frame to the upper Ethernet switch through the root port (RP) so that the upper switch can find the route. If the destination address of the Ethernet frame is recorded in the forwarding table, the upper switch which received the Ethernet frame can transmit the Ethernet frame according to the recording, otherwise, it can transmit the Ethernet frame to the upper switch through the RP to perform the upward search . If there is no Ethernet switch in which the destination address of the Ethernet frame is recorded through this process, the Ethernet frame eventually reaches the root switch.

Referring to FIG. 3, an Ethernet station 4000 as a fixed terminal transmits an Ethernet frame, and the Ethernet switch 2 1200 can receive a transmitted Ethernet frame. The Ethernet switch 2 1200 checks if the forwarding information of the destination address of the Ethernet frame is recorded. If there is no corresponding forwarding information, the Ethernet switch 2 1200 transmits the Ethernet frame to the upstream route switch 1100 through the RP. The root switch 1 1100 checks whether the forwarding information of the destination address of the received Ethernet frame is recorded, and if there is no corresponding forwarding information, the root switch 1 1100 can broadcast the Ethernet frame through designated ports. Through the broadcast of the root switch 1 (1100), the downstream Ethernet switches 2 and 3 (1200 and 1300) can receive the Ethernet frame. When the Ethernet frame broadcasted from the root switch 1 1100 is transmitted to the Ethernet switches 2 to 9 (1200, 1300, 1400, 1500, 1600, 1700, 1800 and 1900) via the RP port, the Ethernet switches 2 to 9 1200, 1300, 1400, 1500, 1600, 1700, 1800, and 1900 can broadcast through all Designated Ports (DPs) if the destination address of the received Ethernet frame is not recorded in the forwarding table. The Ethernet switches 2 to 9 (1200, 1300, 1400, 1500, 1600, 1700, 1800, and 1900) can discard the received Ethernet frame upon receiving the broadcast Ethernet frame through the DP after being reflected from the root switch. The root switch 1 1100 can change the source address of the Ethernet frame for broadcasting, and an example of changing the source address will be described with reference to FIG.

4 is a diagram for explaining an operation of changing an Ethernet frame according to an embodiment.

Referring to FIG. 4, the root switch 1 1100 can change the source address of the Ethernet frame to indicate a reflection frame. Root switch 1 1100 may change the source address to a special address (Reflected Frame Address) assigned to the reflective frame. The root switch 1 (1100) can broadcast the Ethernet frame whose source address is changed through all designated ports. According to one embodiment, the Ethernet switch may skip the learning of the source address if the source address of the received Ethernet frame is RFA. The Ethernet network according to an embodiment employs a technique of changing the source address, thereby preventing confusion of forwarding table processing by the reflected Ethernet frame.

The Ethernet network according to one embodiment may adopt four types of bridge protocol data units (BPDUs) as a protocol between Ethernet switches. Four types of control signals can be defined as shown in Table 1.

Table 1 defines the function of a bridge protocol data unit (BPDU) as a bridge control signal of a protocol between Ethernet switches for "setting only a path between a terminal and a root switch ". Four types of BPDUs are proposed. The path setting control signal and the path uplink erasure control signal are used for dynamic setting and deletion of the path and the path setting control signal and the path downlink erasure control signal are used for changing the path in the handover process of the terminal, And is a bridge control signal used to provide lossless handover of a frame (packet) in a handover process. The definition of the bridge control signal is as shown in Table 1, and the routing BPDU, the path uplink delete BPDU, the path downlink delete BPDU, and the retransmission complete BPDU are adopted to realize functions such as path setting, deletion, change and packet loss prevention The process is as follows.

The path setting BPDU and the path uplink delete BPDU are transmitted in the direction of the RP and induce setting and deletion of the shortest path between the terminal and the root switch. Path establishment BPDU, path downward delete BPDU, and retransmission complete BPDU can be generated at handover. Path Downward Deletion BPDUs are created at the point where the aperture path and the nerve path meet (Ethernet switch) when a new path is established in the presence of an existing path. After the handover, when an uplink path is generated by the path setting BPDU, the Ethernet switch at the point where the aperture path and the neural path meet changes the port information corresponding to the Ethernet address of the terminal to the port information constituting the neural path The forwarding table can be updated. The Ethernet switch at the point where the aperture path and the nerve path meet can generate a path downward delete BPDU and transmit the path downward delete BPDU through the output port corresponding to the aperture path before the handover. The lower Ethernet switch that receives the path downward deletion BPDU may forward downward path deletion BPDU downward according to the forwarding information of the Ethernet address of the corresponding terminal and delete the forwarding information of the Ethernet address of the corresponding terminal. Through this process, the W-AP 2 (2200), which is a wireless AP before the handover, receives the path deletion BPDU, and the path before the handover can be deleted. The W-AP 2 (2200) can transmit the Ethernet frame (packet) stored in the buffer to the handover-completed terminal through the neural network. In this case, the W-AP 2 (2200) can change the source address of the Ethernet frame to RFA, thereby preventing learning of the source address of the Ethernet switches on the transmission path of the Ethernet frame. When all the Ethernet frames stored in the buffer are transmitted, the W-AP 2 (2200) can transmit the retransmission completion BPDU by setting the address of the W-AP 3 (2300) as the destination address. Here, W-AP 2 (2200) is a caliber wireless termination device, and W-AP 3 (2300) may be a nerve-wise wireless termination device.

In general, a BPDU is an Ethernet switch (bridge) single hop packet, in which the destination address uses a multicast address assigned only to that BPDU, but the resend BPDU can use the unicast address of the final destination. The destination address of the retransmitted BPDU may be a multicast address assigned to an existing BPDU. In this case, the control signal information of the retransmission completion BPDU may include the Ethernet address of the wireless end device as a nerve, and the Ethernet switch on the path of the retransmission completed BPDU may forward the retransmission completed BPDU to the wireless termination device as a nerve. The retransmission completion BPDU according to an exemplary embodiment may include characteristics of a multi-hop BPDU. Upon receiving the retransmission completion BPDU, the W-AP 3 2300, which is a wireless AP after the handover, delivers the Ethernet frame (packet) temporarily stored in the buffer to the terminal, and the handover can be completed.

5 is an exemplary diagram illustrating a frame structure of a control signal according to an embodiment.

Referring to FIG. 5, a frame structure of an E2E path control BPDU employed in an Ethernet network is shown as an embodiment of a BPDU defined in Table 1. According to one embodiment, the Ethernet network can perform "end-to-end path control" using the frame structure of an End to End (E2E) Path Control BPDU. According to one embodiment, the frame structure shown in FIG. 5 may be employed in a routing BPDU, a path uplink delete BPDU, and a retransmission complete BPDU.

BPDU proposes protocols (STP, RSTP, MSTP (Multiple Spanning Tree Protocol)) for dynamic topology of Ethernet topology, and the proposed protocol ID is 0X0000. A new Protocol ID may be assigned for the E2E Path Control BPDU according to one embodiment. The version can be used to display the version for coexistence and interoperability of the protocol before and after the change if the future protocol evolves. The type can be used to identify the four types of control signals described above. The flags are used to convey special status information according to each control signal, and can be displayed for displaying a request of each control signal and a corresponding response. The flag can also be used to indicate whether the path setting, the path uplink erasure control signal is transmitted to the root switch, or the transfer of the control signal at the Ethernet switch at the intersection of the neural path and the aperture end. The length indicates the length of the control signal, and the length of the control signal is variable according to the amount of the control information, so that the length can indicate the variable length.

Referring to FIG. 5, a unit of one control message may be composed of an opcode and an Ethernet address of the UE, and N control messages may be used as needed. Path setting BPDUs and path uplink delete BPDUs can be transmitted on the same path, and thus can be transmitted in one frame of a BPDU. At this time, the opcode is used to display the setting and deletion functions according to the address of the terminal. The opcode function may not be defined for the retransmission completion control signal. The Wireless AP identifier is the Ethernet address of the Ethernet switch at the endpoint (calibrated wireless termination or nerve-wired wireless termination). For example, in the path setting BPDU and the path uplink delete BPDU, the wireless AP identifier may be the Ethernet address of the Ethernet switch that generated the control signal. For example, for a retransmitted BPDU, the Wireless AP identifier may be a nerve-walkie wireless termination device. However, the manner in which the wireless AP identifier is defined is not limited thereto, and various embodiments may be employed.

6 is an exemplary diagram illustrating a frame structure of a control signal according to an embodiment.

According to one embodiment, the frame structure shown in FIG. 6 may be employed in a retransmission completed BPDU. According to the frame structure shown in FIG. 6, the control message may include the Ethernet address of the terminal and the Ethernet address of the wireless terminal as a nerve. Here, the Mobile AP Identifier may include information related to the wireless termination by the neuron, for example the neuron may indicate the Ethernet address of the wireless termination. The frame structure shown in FIGS. 5 and 6 is an example of a frame structure according to an embodiment, and the frame structure is not limited to the illustrated one, and one embodiment may implement an Ethernet network by employing another frame structure.

7 is a view for explaining the operation of the Ethernet network according to an embodiment.

The Ethernet network according to an exemplary embodiment may set, delete, and change the path associated with the terminal, and retransmit the Ethernet frame. Referring to FIG. 7, the MN 5000 configures a radio link with the W-AP 2 2200 and configures a path (up path) with the root switch 1100 on the Ethernet network. 7, the path generated by the wireless link of the MN 5000 is a path 500 connected from the W-AP 2 2200 to the root switch 1100 and is indicated by a dotted line. The path 610 through which the Ethernet frame (packet) transmitted from the CN1 3100 reaches the MN 5000 is indicated by a solid line (3100-2100-1600-1400-1700-2200-5000). The path 620 through which the Ethernet frame (packet) transmitted from the CN2 3200 reaches the MN 5000 is indicated by the solid lines 3200-2400-1900-1500-1200-1400-1700-2200. The path 630 through which the Ethernet frame (packet) transmitted from the CN3 3300 reaches the MN 5000 is indicated by the solid line 3300-1300-1100-1200-1400-1700-2200.

When an Ethernet frame for arriving at the MN 5000 is received by the Ethernet switch, starting from each CN 3100, 3200, 3300, by "broadcast on route after searching up " according to one embodiment, If the Ethernet address of the Ethernet 5000 is not recorded in the forwarding table, the Ethernet frame received via the RP can be transmitted. If the Ethernet frame is received by the Ethernet switch on the path 500 of the MN 5000 during the upward search in this manner, the Ethernet switch can transmit the Ethernet frame based on the information recorded in the forwarding table . The Ethernet frame may be transmitted to the MN 5000 via the W-AP 2 (2200) according to the path 500 of the MN 5000.

8 is a flowchart illustrating an operation of path setting and path uplink erasure according to an embodiment.

An operation in which a path is established as the terminal is connected to the wireless terminal, and an operation in which the path is deleted as the terminal is disconnected from the wireless terminal is described. Referring to FIG. 8, the MN 5000 can establish a wireless link with the W-AP 2 (2200) (801). Here, the W-AP 2 (2200) may be a wireless terminal device connected to the MN 5000. When the wireless link between the MN 5000 and the W-AP 2 2200 is configured, the authentication of the MN 5000 may be performed (802). Here, the authentication can be performed using the authentication server or can be performed by itself.

When the W-AP 2 2200 is connected to the MN 5000, it may generate a routing BPDU including the Ethernet address of the MN 5000 (803). Here, the MN 5000 may be initially connected to the W-AP 2 (2200) or may be connected by handover. The W-AP 2 (2200) can transmit the routing BPDU to the Ethernet switch 7 (1700), which is the upper Ethernet switch, through the RP (804). The Ethernet switch 7 (1700) can write the Ethernet address of the MN 5000 in the forwarding table (805) based on whether or not the Ethernet address of the MN 5000 is recorded in the forwarding table. The Ethernet switch 7 (1700) can write the port on which the routing BPDU is received to the forwarding table as an output port corresponding to the Ethernet address of the MN (5000). When the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table, the Ethernet switch 7 (1700) can update the output port to the port on which the routing BPDU is received.

The Ethernet switch 7 (1700) can transmit the routing BPDU to the upper Ethernet switch 4 (1400) via the RP. When the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table and the recorded output port is the port on which the routing BPDU is received, the Ethernet switch 7 (1700) transmits the routing BPDU to the upper Ethernet switch 4 (1400). In this manner, the routing BPDU may be transmitted (806) from the Ethernet switch 7 (1700) to the root switch 1100 via Ethernet switch 4 (1400), Ethernet switch 2 1200.

When receiving the routing BPDU, the root switch 1100 can record the Ethernet address of the MN 5000 in the forwarding table based on whether or not the Ethernet address of the MN 5000 is recorded in the forwarding table (807 ). The root switch 1100 may write the port on which the routing BPDU is received to the output port corresponding to the Ethernet address of the MN 5000. [ The root switch 1100 can update the recorded output port to the port on which the routing BPDU is received when an output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table. The root switch 1100 can complete the updating of the forwarding table and terminate the transmission of the routing BPDU.

Referring to FIG. 8, the MN 5000 may terminate the wireless link with the W-AP 2 (2200) (808). Here, the W-AP 2 (2200) may be a caliber radio terminal device disconnected from the MN 5000. When the connection with the MN 5000 is disconnected, the W-AP 2 2200 may generate a path uplink erasure BPDU including the Ethernet address of the MN 5000 (809). The W-AP 2 2200 may transmit the path uplink delete BPDU to the upper Ethernet switch 7 (1710) via the RP (810).

When receiving the path uplink erasure BPDU, the Ethernet switch 7 (1700) can delete the recorded output port from the forwarding table if the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table (811 ). The Ethernet switch 7 (1700) can transmit the path uplink delete BPDU to the upper Ethernet switch 4 (1400) via the RP. In this manner, the path uplink erasure BPDU may be transmitted 812 from the Ethernet switch 7 (1700) to the root switch 1100 via the Ethernet switch 4 (1400) and the Ethernet switch 2 (1200).

The root switch 1100 may delete the recorded output port from the forwarding table if the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table (813). The root switch 1100 can terminate the transmission of the path uplink delete BPDU.

As described above, the path setting and the path deletion are performed in such a manner that the Ethernet address of the MN 5000 is recorded in the forwarding table of the Ethernet switches on the path connecting the MN 5000 and the root switch 1100 and deleted from the forwarding table . Here, the Ethernet address can be recorded as a fixed entry (address information whose recording is changed by control regardless of time) or general entry (address information which is deleted after a predetermined time). When the Ethernet address is recorded as a fixed entry, the setting state can be maintained in one setting. However, if there is a change in the network topology, unrecovered information may remain or a separate process of clearing erroneous information may be required. If the Ethernet address is written as a regular entry, the Ethernet network can adapt without any extra function even if there is a change in the network topology because the record is deleted after a certain period of time. However, it may be necessary to periodically transmit routing BPDUs to maintain the path. When the Ethernet address is recorded as a general entry, the W-AP 2 (2200) connected to the MN 5000 checks whether it is necessary to continuously maintain the connection state in the Ethernet network, and then periodically generates a routing BPDU To the Ethernet network, and the path can be maintained by the path setting BPDU that is periodically transmitted.

In the course of performing the routing, the Ethernet switch can receive the routing BPDU, and if the routing BPDU is the same as the port on which the forwarding table is received, the routing BPDU can be forwarded to the upper Ethernet switch via the RP. have. The Ethernet switch can change the port recorded in the forwarding table to the port on which the routing BPDU is received and generate a path downward delete BPDU if the port on which the routing BPDU is received and the port recorded on the forwarding table are different. The Ethernet switch can forward the path-down delete BPDU to the lower Ethernet switch through the port written to the forwarding table. Path Downward Deletion Through the transmission of BPDUs to lower Ethernet switches, the aperture path can be deleted.

In the process of path deletion, the Ethernet switch can receive the path uplink delete BPDU. If the port on which the path uplink delete BPDU is received is not recorded in the forwarding table, the path uplink delete BPDU is transmitted to the upper Ethernet switch Lt; / RTI > The Ethernet switch can generate a path downward delete BPDU when the port on which the path uplink delete BPDU is received and the port on which the forwarding table is written are different. The Ethernet switch can forward the path-down delete BPDU to the lower Ethernet switch through the port written to the forwarding table. Path Downward Deletion Through the transmission of BPDUs to lower Ethernet switches, the aperture path can be deleted. Hereinafter, with reference to Figs. 9 to 12, an embodiment in which handover is performed will be described.

9 to 11 are diagrams for explaining the operation of the Ethernet network according to an embodiment. FIG. 12 is a flowchart for explaining an operation of path uplink deletion, routing, downlink deletion and retransmission completion according to an embodiment to be.

9, signal weakness is detected by the MN 5000 or the W-AP 2 2200, and the connection between the MN 5000 and the W-AP 2 2200 may be disconnected (1201). For example, the connection between the MN 5000 and the W-AP 2 2200 may be disconnected by the handover of the MN 5000. The MN 5000 or the W-AP 2 2200 can detect that the wireless link is deteriorated and can reduce the amount of packets (frames) of the corresponding wireless link or stop the transmission of the packet. The W-AP 2 2200 may store the Ethernet frames received from the Ethernet network in the buffer 900 (1202). Here, the Ethernet frames are to be transmitted to the MN 5000. For example, an Ethernet frame stored in the buffer 900 may be an Ethernet frame transmitted from the CN 1 3100 via the path 670, and may be an Ethernet frame transmitted from the CN 2 3200 via the path 680 And may be an Ethernet frame transmitted from CN 3 3300 via path 690 and an Ethernet frame transmitted via path 500 through route switch 1100.

The Ethernet address of the MN 5000 may be recorded in the forwarding table of the Ethernet switches 1200, 1400, 1700, the root switch 1100 and the W-AP 2 2200 on the path 500. The handover process can be started through the Ethernet frame being stored in the buffer 900 of the W-AP 2 (2200). Here, the W-AP 2 (2200) may be a caliber wireless termination device. The W-AP 2 2200 generates a path uplink delete BPDU including the Ethernet address of the MN 5000 based on whether or not the connection with the MN 5000 is disconnected. Can be transmitted.

As the handover is started, the W-AP 2 (2200), the MN (5000), and the W-AP 3 (2300) can share information necessary for handover (1203). Here, the W-AP 3 2300 may be a wireless terminal device connected to the MN 5000 by handover.

Referring to FIG. 10, the W-AP 3 2300 can be connected to the MN 5000 by a handover (1204). The W-AP 3 2300 can generate a routing BPDU including the Ethernet address of the MN 5000 based on whether or not the W-AP 3 2300 is connected to the MN 5000 by handover. The W-AP 3 2300 can transmit the generated routing BPDU to the upper Ethernet switch 8 (1800) via the RP (1205). The W-AP 3 2300 may store the Ethernet frame to be transmitted to the MN 5000 in the buffer 910 (1210). For example, an Ethernet frame to be transmitted from the CN 1 3100 to the MN 5000 via the path 671 is stored in the buffer 910 and the MN 5000 is transmitted from the CN 2 3200 via the path 681 In the buffer 910 and may store in the buffer 910 an Ethernet frame to be transmitted from the CN 3 3300 to the MN 5000 via the path 691.

The Ethernet switch 8 1800 may write the Ethernet address of the MN 5000 to the forwarding table based on whether or not the Ethernet address of the MN 5000 is written in the forwarding table. The operation in which the Ethernet address of the MN 5000 is recorded is performed by applying the above-described embodiment. Ethernet switch 8 1800 can forward the routing BPDU to the upper Ethernet switch via the RP based on the Ethernet address of MN 5000 and the routing BPDU can forward Ethernet switch 2 1200 according to neural path 511. [ (1207). ≪ / RTI > Here, the Ethernet switch 2 1200 is located at the intersection of the aperture path 500 and the nerve root 511. As described above, the Ethernet switch 2 1200 can record the Ethernet address of the MN 5000 in the forwarding table based on whether the Ethernet address of the MN 5000 is recorded in the forwarding table (1208). Ethernet switch 2 1200 can terminate the transmission of the routing BPDU or transmit it upward through the RP.

The path setting BPDU can reach the root switch 1 1100 according to the neural pathway 511. [ As described above, the root switch 1 1100 records the Ethernet address of the MN 5000 in the forwarding table based on whether or not the Ethernet address of the MN 5000 is recorded in the forwarding table, and transmits the routing BPDU Can be terminated. The path setting BPDU may be transmitted along the neural pathway 511 to complete the nerve path setup.

In the process of setting the nerve pathway, the Ethernet switch 2 1200 at the intersection of the aperture path 500 and the nerve pathway 511 can generate the path downward deletion BPDU. Ethernet switch 2 1200 may forward the path downward delete BPDU in the direction of W-AP 2 (2200), and the aperture path 500 may be deleted as the path downward delete BPDU is transmitted. For example, the Ethernet switch 2 1200 can receive a routing BPDU including the Ethernet address of the MN 5000 from the lower Ethernet switch 5 1500. [ When the output port corresponding to the Ethernet address included in the routing BPDU is recorded in the forwarding table and the recorded output port is different from the port on which the routing BPDU is received, the Ethernet switch 2 (1200) Can be generated. The Ethernet switch 2 1200 can transmit the path downward delete BPDU to the lower Ethernet switch 4 1400 through the pre-recorded output port. Herein, the routing BPDU is generated by the wireless terminal 2300 with the neuron connected by the handover of the MN 5000, and the routing downward deletion BPDU is generated by the wireless terminal 2300 with the Ethernet address and nerve of the MN 5000, Lt; RTI ID = 0.0 > Ethernet < / RTI > address.

Ethernet switch 4 1400 may receive the path-down delete BPDU. The Ethernet switch 4 (1400) can discard the path downward delete BPDU when the port on which the path downward delete BPDU is received is the designated port. The Ethernet switch 4 1400 can transmit the path downward delete BPDU to the lower Ethernet switch 7 (1700) when the port on which the path downward delete BPDU is received is the root port. When the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table, the Ethernet switch 4 (1400) transmits the downward path deletion BPDU to the lower Ethernet switch 7 (1700) through the pre-recorded output port , The output port recorded in the forwarding table can be deleted. As described above, the path downward deletion BPDU can reach the W-AP 2 2200 from the Ethernet switch 2 1200 via the Ethernet switch 4 1400 and the Ethernet switch 7 1700 (1209). Path deletion can be completed as the BPDU arrives at the W-AP 2 (2200), which is a caliber radio terminating device.

In the manner that the MN 5000 is connected by the W-AP 3 2300 by the handover and the routing BPDU generated by the W-AP 3 2300 is transmitted via the neural network 511, 5000) can be completed (1211).

The W-AP 2 (2200), which is a wireless end device, can generate a path uplink erasure BPDU including the Ethernet address of the MN 5000. The W-AP 2 (2200) can generate a path uplink delete BPDU based on whether or not the connection with the MN 5000 is disconnected. The W-AP 2 2200 may store an Ethernet frame in the buffer 900 to be transmitted to the disconnected MN 5000. The W-AP 2 (2200) may transmit the generated path uplink erasure BPDU to the upper Ethernet switch 7 (1712) via the RP (1212). The Ethernet switch 7 (1700) receives the path uplink erasure BPDU and may delete the output port from the forwarding table (1213) if the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table. The Ethernet switch 7 1700 may transmit the path uplink erasure BPDU to the upper Ethernet switch 4 1400 via the RP and the path uplink erase BPDU may transmit the Ethernet UP switch 2 at the intersection of the aperture path 500 and the nerve path 511 Lt; RTI ID = 0.0 > 1200 < / RTI > When the output port corresponding to the Ethernet address of the MN 5000 is recorded in the forwarding table as described above, the Ethernet switch 2 1200 can delete the output port from the forwarding table (1215).

The W-AP 2 (2200) as the callee wireless terminal can change the source address of the Ethernet frame to be transmitted to the disconnected MN 5000 to indicate a reflection frame (1216). Here, the Ethernet frame is stored in the buffer 900, and the W-AP 2 (2200) can change the source address of the Ethernet frame stored in the buffer 900. In the embodiment for changing the source address, the above description may be applied. The W-AP 2 (2200) may transmit the Ethernet frame with the changed source address to the disconnected MN 5000 (1217). Referring to FIG. 10, the W-AP 2 (2200) can transmit an Ethernet frame having a changed source address to the MN 5000 through a path indicated by a dotted line.

When the source address of the W-AP 3 2300, which is a nerve ending device, receives an Ethernet frame changed to a reflection frame, the W-AP 3 2300 can transmit the received Ethernet frame to the MN 5000. Here, the Ethernet frame transmitted to the MN 5000 is not an Ethernet frame stored in the buffer 910 but an Ethernet frame transmitted from the W-AP 2 (2200).

The W-AP 2 (2200) can generate a retransmission completed BPDU including the Ethernet address of the MN 5000. Here, the destination address of the retransmission completed BPDU may include the Ethernet address of the W-AP 3 (2300), which is the nerve ending device. The W-AP 2 (2200) may transmit the retransmission completed BPDU to the W-AP 3 (2300) (1218). The Ethernet switch can receive the retransmission completed BPDU, and based on the destination address included in the retransmission completed BPDU, the switch can transmit the retransmitted complete BPDU.

10, when receiving the retransmission completion BPDU including the Ethernet address of the MN 5000, the W-AP 3 2300 may transmit the Ethernet frame stored in the buffer 910 to the MN 5000 1219). Based on the source address, the W-AP 3 2300 can transmit the Ethernet frame transmitted from the W-AP 2 (2200), which is the callee wireless terminal, to the MN 5000 without buffering, And transmits the Ethernet frame to the MN 5000 after receiving the retransmission complete BPDU. In this way, the order of delivery of Ethernet frames (packets) may not change.

Referring to FIG. 11, after the handover is completed, the Ethernet network may operate based on the newly set path 511 (operation 1220).

13 to 15 are views for explaining a method of connecting terminals to an Ethernet network according to an embodiment.

13 to 15, three methods for connecting a terminal directly to an Ethernet layer and connecting to an Ethernet network are proposed.

Referring to FIG. 13, in order to directly connect a mobile terminal to an Ethernet network, a method of overlaying an IEEE 802.3 MAC over a wireless MAC is proposed. In case of delivering the IEEE 802.3 MAC overlaid on the wireless MAC, various wireless MACs are only applied on the wireless link, and in terms of networking, the terminal can be directly connected through the Ethernet Ethernet network and Ethernet, and the mobility function of the Ethernet network Can be used.

Referring to FIG. 14, a packet conversion method for directly connecting a mobile terminal to an Ethernet network is proposed. Through the proposed method, the IEEE 802.3 MAC address can be derived from unique IDs such as the terminal ID, the subscriber ID, or the MAC address of the mobile terminal. The wireless MAC of the mobile terminal can be converted into the IEEE 802.3 MAC having the derived MAC address and the mobile terminal can be connected to the IEEE802.1 Ethernet network through the converted wireless MAC.

Referring to FIG. 15, a packet conversion method for directly connecting a mobile terminal to an Ethernet network is proposed. The method described with reference to FIGS. 14 and 15 may be used according to the design intention of the user.

16 is a diagram for explaining a method of configuring a mobile network according to an embodiment.

According to one embodiment, the local network may be configured as an Ethernet network, and the regional / national / global scale network may be configured as an IP mobile network. Referring to FIG. 16, the wireless MAC is connected through the protocol stack according to FIGS. 13 and 14, and the mobility of the local network can be realized by the Ethernet network. An IP mobile network can be configured using IP mobility such as Proxy Mobile IP (PMIP) and Mobile IP (MIP) in a local / national / global network. Referring to FIG. 16, a mobility management function of a mobile terminal may be configured for each of an Ethernet network and an IP network. However, the configuration of the network described with reference to Fig. 16 is merely an example, and various applications can be adopted according to the design intent.

17 is a diagram for explaining a method of configuring a mobile network according to an embodiment.

Referring to FIG. 17, a mobile network configured in a manner different from FIG. 16 is proposed. According to one embodiment, the GTP is configured with a local / national scale network, and when the global network is implemented as an IP mobile network, the local network can be implemented as an Ethernet network. The mobility management function may be configured as shown in FIG. 17 for each network such as an Ethernet network, a GTP network, and an IP network, to which the embodiment described with reference to FIG. 16 is applied. However, the configurations of the networks described with reference to Figs. 16 and 17 are merely examples, and various applications can be employed according to the design intent.

18 is a view for explaining an aspect in which an Ethernet network according to an embodiment accommodates another network.

Referring to FIG. 18, a network structure for integrating or accommodating various mobile networks, WiFi, and wired networks is proposed, focusing on a local network implemented as an Ethernet network. Various future WAN mobile network terminals including the future 5G can access the local Ethernet network, move to a seamless handover environment, and access the local WAN mobile network through the local Ethernet network. The concrete protocol configuration can be applied to the embodiment described with reference to Figs. 13 to 17. Fig.

One embodiment relates to an Ethernet network. Although the above description has been made with reference to a wireless terminal directly connected to an Ethernet network, the present invention is not limited thereto. The above-described embodiment can be realized by changing the software of the Ethernet network. The wireless terminals of the IEEE family can be directly connected at the Ethernet layer by mutual conversion between MAC frames. In the 3GPP wireless MAC such as LTE, the wireless terminal of the IEEE series has the effect of being virtually connected directly. When the overlay scheme of "IEEE 802.3 MAC over wireless MAC" is applied, the wireless terminal of the IEEE family can actually be directly connected to the Ethernet layer.

The embodiments described above may be implemented in hardware components, software components, and / or a combination of hardware components and software components. For example, the devices, methods, and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, such as an array, a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with reference to the drawings, various technical modifications and variations may be applied to those skilled in the art. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (20)

A method for providing mobility of an Ethernet switch,
Receiving an Ethernet frame through a port of the Ethernet switch; And
Transmitting the Ethernet frame to an upper Ethernet switch through a root port of the Ethernet switch based on whether a destination address of the Ethernet frame is recorded in a forwarding table
Containing
Providing mobility.
The method according to claim 1,
If the upper Ethernet switch is a root switch,
The root switch discards the Ethernet frame or changes the source address of the Ethernet frame to indicate a reflection frame based on whether the destination address of the Ethernet frame is recorded in the forwarding table, Broadcast through dedicated ports,
Providing mobility.
The method according to claim 1,
Receiving an Ethernet frame in which the source address indicates a reflective frame;
Omitting learning of the source address; And
Based on whether or not the destination address of the Ethernet frame indicating the reflection frame is recorded in the forwarding table, the source address is transmitted through designated ports except the root port to the Ethernet frame indicating the reflection frame Broadcasting step
Further comprising
Providing mobility.
The method according to claim 1,
Comprising: receiving a routing control signal including an Ethernet address of a terminal;
Recording the Ethernet address in the forwarding table based on whether the Ethernet address is recorded in the forwarding table and recording the port on which the routing control signal is received to an output port corresponding to the Ethernet address; And
Transmitting the routing control signal to the upper Ethernet switch via the root port based on the Ethernet address;
Further comprising
Providing mobility.
5. The method of claim 4,
If the output port corresponding to the Ethernet address is recorded in the forwarding table, updating the output port with the port from which the routing control signal is received
≪ / RTI >
Providing mobility.
5. The method of claim 4,
The step of transmitting the routing control signal
Transmitting the routing control signal when an output port corresponding to the Ethernet address is recorded in the forwarding table and the output port is a port on which the routing control signal is received;
/ RTI >
Providing mobility.
5. The method of claim 4,
Generating an uplink downlink control signal when an output port corresponding to the Ethernet address is recorded in the forwarding table and the output port is different from the port on which the routing control signal is received; And
Transmitting the path downlink erasure control signal to the lower Ethernet switch through the output port
Further comprising:
Wherein the routing control signal is generated by a wireless terminal with a neural network to which the terminal is connected by handover,
Wherein the path downlink erasure control signal includes the Ethernet address and the Ethernet address of the wireless terminal as the nerve,
Wherein the Ethernet frame to be transmitted to the terminal is stored in a buffer of the wireless terminal with the nerve,
Providing mobility.
5. The method of claim 4,
When the upper Ethernet switch that has received the routing control signal is the root switch,
The root switch
Writing the Ethernet address into the forwarding table of the root switch based on whether the Ethernet address is recorded in the forwarding table of the root switch and terminating the transmission of the routing control signal,
Providing mobility.
The method according to claim 1,
The method comprising: receiving a path uplink erasure control signal including an Ethernet address of the terminal; And
Deleting the output port from the forwarding table when the output port corresponding to the Ethernet address is recorded in the forwarding table, and transmitting the path uplink erasure control signal to the upper Ethernet switch through the root port
Further comprising
Providing mobility.
10. The method of claim 9,
When the upper Ethernet switch that has received the path uplink erasure control signal is a root switch,
The root switch
When the output port corresponding to the Ethernet address is recorded in the forwarding table of the root switch, deletes the output port recorded in the forwarding table of the root switch and terminates the transmission of the path uplink erasure control signal,
Providing mobility.
10. The method of claim 9,
Wherein the path uplink erasure control signal is generated by a calibrated radio terminal device disconnected from the terminal and comprises the Ethernet address,
And an Ethernet frame to be transmitted to the terminal is stored in a buffer of the caliber radio terminal.
Providing mobility.
The method according to claim 1,
Receiving a path downlink erasure control signal including an Ethernet address of the terminal;
Discarding the path downlink erasure control signal when the port on which the path downlink erasure control signal is received is a designated port; And
And transmitting the path downlink erasure control signal to the lower Ethernet switch when the port on which the path downlink erasure control signal is received is a root port
Further comprising
Providing mobility.
13. The method of claim 12,
The step of transmitting the path downlink erasure control signal
When the output port corresponding to the Ethernet address is recorded in the forwarding table, transmitting the path downlink erasure control signal through the output port and deleting the output port from the forwarding table
/ RTI >
Providing mobility.
13. The method of claim 12,
Wherein the path downlink erasure control signal further includes an Ethernet address of the wireless terminal as a nerve to which the terminal is connected by handover,
Wherein the Ethernet frame to be transmitted to the terminal is stored in the buffer of the wireless terminal with the nerve,
The nerve root wireless terminal
When receiving an Ethernet frame in which a source address is changed to a reflection frame, transmits the received Ethernet frame to the terminal,
When receiving a retransmission completion control signal including the Ethernet address of the terminal, transmits an Ethernet frame stored in the buffer to the terminal,
Wherein the retransmission completion control signal is generated by a wireless terminal with a caliber disconnected from the terminal,
Providing mobility.
13. The method of claim 12,
Wherein the path downlink erasure control signal is received by the callee wireless termination device disconnected from the terminal,
An Ethernet frame to be transmitted to the terminal is stored in a buffer of the caliber wireless terminal,
The caliber radio termination device
Changes the source address of the Ethernet frame stored in the buffer to indicate a reflection frame,
Transmitting the Ethernet frame with the changed source address to the terminal based on the path downlink erasure control signal,
Generating a retransmission completion control signal including the Ethernet address when the Ethernet frame stored in the buffer is transmitted, and transmitting the retransmission completion control signal to the wireless terminal through the nerve connected by the handover;
Providing mobility.
The method according to claim 1,
Comprising: receiving a retransmission completion control signal including an Ethernet address of a terminal; And
Transmitting the retransmission completion control signal based on the destination address included in the retransmission completion control signal
Further comprising:
Wherein the retransmission completion control signal is generated by a wireless terminal with a caliber disconnected from the terminal,
Wherein the destination address includes an Ethernet address of a wireless end device as a nerve to which the terminal is connected by handover,
Providing mobility.
A method for providing mobility of a wireless termination device,
Generating a path setting control signal including an Ethernet address of the terminal based on whether the terminal is connected to the terminal by handover;
Storing an Ethernet frame to be transmitted to the terminal in a buffer; And
Transmitting the path setting control signal to the Ethernet switch
Containing
Providing mobility.
18. The method of claim 17,
Transmitting the received Ethernet frame to the terminal when receiving an Ethernet frame in which the source address is changed to a reflection frame; And
When receiving a retransmission completion control signal including the Ethernet address, transmitting an Ethernet frame stored in the buffer to the terminal
Further comprising:
Wherein the retransmission completion control signal is generated by a wireless terminal with a caliber disconnected from the terminal,
Providing mobility.
18. The method of claim 17,
Generating a path uplink erasure control signal including an Ethernet address of the terminal that has been disconnected based on whether or not the terminal is disconnected; And
Storing an Ethernet frame to be transmitted to the disconnected terminal in a buffer
≪ / RTI >
Providing mobility.
20. The method of claim 19,
Changing a source address of an Ethernet frame to be transmitted to the disconnected terminal to indicate a reflection frame;
Transmitting the Ethernet frame in which the source address is changed to the disconnected terminal;
Generating a retransmission completion control signal including the Ethernet address of the terminal disconnected; And
And transmitting the retransmission completion control signal to the wireless terminal through the nerve connected by the handover by the terminal
Further comprising:
Wherein the destination address of the retransmission complete control signal comprises an Ethernet address of the wireless termination device to the nerve,
Providing mobility.

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