WO2017026564A1

WO2017026564A1 - Method for controlling power consumption of network terminal on profile network, and network terminal performing same

Info

Publication number: WO2017026564A1
Application number: PCT/KR2015/008737
Authority: WO
Inventors: 박부식
Original assignee: 전자부품연구원
Priority date: 2015-08-12
Filing date: 2015-08-21
Publication date: 2017-02-16
Also published as: KR101764173B1; KR20170019611A

Abstract

The present invention relates to a network technique of a network terminal that is on a profile network, wherein a method for controlling the power consumption of a network terminal that is on a profile network comprises the steps of: (a) connecting to another network terminal via a virtual link that is defined by means of a maximum transmission length of a frame and a minimum transmission interval between frames; (b) transmitting a current frame via the virtual link; and (c) if the current frame has been transmitted, controlling power consumption until prior to the elapsing of the current minimum transmission interval.

Description

A method for controlling power consumption of a network terminal on a profile network and a network terminal performing the same

The present invention relates to a power consumption control technique of a network terminal on a profile network. More particularly, the present invention relates to a profile network capable of saving power by controlling power consumption during a period in which no data is transmitted between network terminals. A method of controlling power consumption of a network terminal and a network terminal performing the same.

ARINC 664 defines a protocol for transmitting and receiving control data in an aircraft using Deterministic Ethernet. For example, ARINC 664 Switched Ethernet is used in modern aircraft such as the A380 and B787.

Networks transmitting and receiving control data within the aircraft must ensure very strict and predictable Deterministic Quality of Service (QoS).

To this end, the ARINC 664 Part 7 specification sets the maximum transmission length (Lmax) of a frame that can be transmitted in one virtual link (VL) and the minimum transmission interval (BAG) between frames. Set it. In addition, one or more virtual links VL may exist in each end system. Each virtual link VL has a preset Lmax and a BAG. One or more virtual links (VLs) are connected to applications of the end system, and data is exchanged through the virtual links.

Data generated by each application is encapsulated into frames according to a specification, and transmitted and received according to Lmax and BAG set in a corresponding virtual link. If the end system transmits a frame without complying with this rule, the switch connected to the end system discards the frame after receiving the frame.

The ARINC 664 Part 7 specification does not describe a method of saving power, which causes unnecessary power supply and wasted power on network terminals (eg end systems, switches, etc.).

An embodiment of the present invention is to provide a method for controlling power consumption of a network terminal on a profile network capable of controlling power consumption of the network terminal during a period in which no data is transmitted between the network terminals and a network terminal performing the same. .

An embodiment of the present invention provides a method for controlling power consumption of a network terminal on a profile network that can save power without delaying data transmission by dynamically controlling power consumption of the network terminal, and a network terminal performing the same. To provide.

An embodiment of the present invention is to provide a method for controlling power consumption of a network terminal on a profile network that can save power while ensuring stability of a vehicle and a network terminal performing the same.

Among the embodiments, the method for controlling power consumption of a network terminal on a profile network includes (a) connecting with another network terminal via a virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between frames, ( b) transmitting a current frame over the virtual link, and (c) if the current frame is transmitted, controlling power consumption until a current minimum transmission interval has elapsed.

In an embodiment, step (c) may include checking whether the current minimum transmission interval is less than a specific time before controlling the power consumption, and controlling the power consumption when there is no next frame. .

In an embodiment, step (c) may include maintaining the power consumption when the next frame is present.

In one embodiment, the step (c) may include obtaining a power profile for at least one power consumption object in the network terminal.

In an embodiment, the step (c) may further include obtaining a next frame state and a vehicle state to determine a current power control level.

In one embodiment, the step (c) further comprises controlling the power consumption of the at least one power consumption object according to the obtained power profile before the current minimum transmission interval has elapsed and the next frame is generated. can do.

In one embodiment, the power profile may be used to control power consumption reflecting virtual link characteristics determined based on endpoints of the virtual link.

In one embodiment, the virtual link characteristic may comprise at least one power level that is transitionable during the power consumption phase on the power profile.

Among the embodiments, the method for controlling power consumption of a network terminal on a profile network may include: (a) connecting to another network terminal through at least one virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between frames. And (b) analyzing all minimum transmission intervals of the at least one virtual link if no current frame is being transmitted on the at least one virtual link and controlling power consumption until the closest minimum transmission interval has elapsed. Include.

In an embodiment, the step (b) may include checking whether a virtual link having a power uncontrollable level defined by a power profile is included in the at least one virtual link.

In an embodiment, the step (b) may include controlling the power consumption object not to lower the power when the virtual link of the power control level is identified.

In one embodiment, the network method of a network terminal on a profile network further comprises the step of preparing a virtual link usage state map indicating the at least one virtual link and the usage state, wherein step (b) comprises: Controlling power consumption until the closest minimum transmission interval elapses based on the usage state map.

Among the embodiments, the network terminal includes a first network terminal and a second network terminal connected with the first network terminal via a virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between frames, wherein When the current frame is transmitted, the first network terminal controls the power consumption until the current minimum transmission interval elapses.

In one embodiment, the first network terminal may control the power consumption by acquiring a power profile for at least one power consumption object in the network terminal.

In one embodiment, the first network terminal may control the power consumption of the at least one power consumption object according to the obtained power profile until the current minimum transmission interval elapses and the next frame is generated.

The disclosed technique can have the following effects. However, since a specific embodiment does not mean to include all of the following effects or only the following effects, it should not be understood that the scope of the disclosed technology is limited by this.

According to an embodiment of the present invention, a method for controlling power consumption of a network terminal on a profile network and a network terminal performing the same may save power by controlling power consumption of the network terminal during a period in which no data is transmitted between the network terminals. Can be.

Method of controlling power consumption of a network terminal on a profile network according to an embodiment of the present invention and a network terminal performing the same can save power without delaying data transmission by dynamically controlling power consumption of the network terminal. have.

A method of controlling power consumption of a network terminal on a profile network according to an embodiment of the present invention and a network terminal performing the same may save power while ensuring stability of a vehicle.

1 is a diagram illustrating a profile network including a network terminal connected through a virtual link.

FIG. 2 is a flowchart illustrating a power consumption control method performed in the network terminal of FIG. 1.

3 is a block diagram illustrating a configuration of a network terminal corresponding to an end system.

4A and 4B are diagrams illustrating an example of a specific processing procedure of the power consumption control method performed in the network terminal of FIG. 1.

5A and 5B are diagrams illustrating another example of a specific processing procedure of the power consumption control method performed in the network terminal of FIG. 1.

6 is a diagram illustrating a configuration of a transmitting network terminal connected through a plurality of virtual links.

FIG. 7 is a diagram illustrating a specific processing procedure of the power consumption control method performed in the network terminal of FIG. 6.

8 is a diagram illustrating a virtual link usage state map.

9 is a diagram illustrating a state transition diagram of a transmitting network terminal.

10 is a diagram illustrating a state transition diagram of a receiving side network terminal.

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprise" or "have" refer to a feature, number, step, operation, component, part, or feature thereof. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

In each step, an identification code (e.g., a, b, c, etc.) is used for convenience of description, and the identification code does not describe the order of the steps, and each step clearly indicates a specific order in context. Unless stated otherwise, they may occur out of the order noted. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer readable code on a computer readable recording medium, and the computer readable recording medium includes all kinds of recording devices in which data can be read by a computer system. . Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and are also implemented in the form of a carrier wave (for example, transmission over the Internet). It also includes. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

Referring to FIG. 1, the profile network 100 includes an application 110, an end system 120, and a switch 130, and at least one

application

110a, 110b, 110c may be connected to the end system 120. Can be. These may each be connected via at least one or more virtual links.

The profile network 100 is a QoS Determined Network, which is a network in which data transmission is previously determined and a network speed is slowed or a real time response is not solved. In one embodiment, the profile network 100 may correspond to an Avionics Full DupleX Switched Ethernet (ARINC 664 Part 7; AFDX) network.

The application 110 may be connected to the end system 120 and generate data according to a process of the corresponding application. Alternatively, the application 110 may receive data and process the data according to the process. For example, in the case of a Remote Data Concentrator (RDC) application that transmits data collected from an external interface to a multi-function display (MFD), the RDC may transmit the collected data to the MFD. Linked and exchange data over virtual links.

End system 120 is connected to at least one virtual link as a destination or source of data. The end system 120 is connected to the switch 130 and transmits and receives a frame according to a maximum transmission length Lmax of a frame set in the connected virtual link and a minimum transmission gap (BAG) between the frames.

The switch 130 determines whether the received frame is transmitted according to the maximum transmission length Lmax of the set frame and the minimum transmission interval BAG between the frames, and switches the received frame to the destination. If the received frame is not transmitted according to the maximum transmission length Lmax of the set frame and the minimum transmission interval BAG between the frames, the switch 130 discards the frame. The switch 130 may be connected to another end system or another switch.

In one embodiment, the end system 120 sends the current frame to the switch 130 via the virtual link. When the end system 120 is in a controlled power consumption state (eg, the transmitting module is OFF), the end system 120 releases the controlled power consumption state (eg, the transmission module is ON) and The current frame is transmitted to the switch 130. When the current frame is transmitted, the end system 120 controls the power consumption until the current minimum transmission interval elapses.

The switch 130 receives the current frame transmitted from the end system 120 through the virtual link, and controls the power consumption until the current minimum transmission interval elapses when the current frame is received. If the switch 130 is in a state in which the power consumption is controlled (for example, the receiving module is OFF), the switch 130 releases the state in which the power consumption is controlled (for example, the receiving module is ON). Receive the current frame.

In contrast, when the switch 130 transmits a frame to the end system 120, when the current frame is transmitted, the switch 130 controls power consumption until the current minimum transmission interval elapses. The end system 120 controls the power consumption until the current minimum transmission interval elapses when the current frame is received.

In one embodiment, the end system 120 or switch 130 obtains a power profile for at least one power consumption object at that network terminal and obtains it until the current minimum transmission interval has elapsed and the next frame occurs. The power consumption of the at least one power consumption object may be controlled according to the used power profile. In one embodiment, the power profile for the power consuming object represents a predefined power consumption step for the power consuming object.

2 is a flowchart illustrating a network method performed in the network terminal of FIG. 1.

Referring to FIG. 2, a network terminal (eg, an end system) may be connected to another network terminal (eg, via a virtual link defined through a maximum transmission length Lmax of a frame and a minimum transmission interval BAG between the frames). , Switch or other end system) (step S210).

The network terminal transmits the current frame through the connected virtual link (step S220). For example, the end system 120 encapsulates the data generated by the application 110 into frames, the maximum transmission length (Lmax) of the frame set on the virtual link to transmit the frame, and the minimum transmission interval between the frames ( Frame may be transmitted to the switch 130 according to BAG).

If the current frame is transmitted, the network terminal controls the power consumption until the current minimum transmission interval elapses (step S230).

In one embodiment, the network terminal obtains a power profile for at least one power consumption object in the network terminal and at least one of the power profiles according to the obtained power profile before the current minimum transmission interval elapses and before the next frame is generated. The power consumption of the power consumption object can be controlled. In one embodiment, the power profile for the power consumption object is defined as a power consumption step for the power consumption object, as shown in Table 1 below.

전력소비단계전력소비개체Power Consumption Stage	전력제어레벨0(OFF 불가)Power control level 0 (OFF OFF)	전력제어레벨1(다음의 송신 패킷 있음)Power control level 1 (the following transmission packet exists)	전력제어레벨2(다음의 송신 패킷 없음비행기 이륙 상황)Power control level 2 (next takeoff packet plane takeoff situation)	전력제어레벨3(다음의 송신 패킷 없음비행기 운행 상황)Power control level 3 (the plane service situation that there is no next transmission packet)	전력제어레벨4(다음의 송신 패킷 없음비행기 착륙 상황)Power control level 4 (the next landing packetless plane landing situation)
BAG 컨트롤러BAG controller	HIGHHIGH	HIGHHIGH	HIGHHIGH	HIGHHIGH	HIGHHIGH
스케줄러Scheduler	HIGHHIGH	HIGHHIGH	HIGHHIGH	HIGHHIGH	HIGHHIGH
리던던시 매니저(Tx)Redundancy Manager (Tx)	HIGHHIGH	HIGHHIGH	HIGHHIGH	LOWLOW	HIGHHIGH
프레임 생성기Frame generator	HIGHHIGH	HIGHHIGH	LOWLOW	LOWLOW	LOWLOW
리던던시 매니저(Rx)Redundancy Manager (Rx)	HIGHHIGH	HIGHHIGH	HIGHHIGH	LOWLOW	HIGHHIGH
무결성 체커Integrity checkers	HIGHHIGH	HIGHHIGH	LOWLOW	LOWLOW	LOWLOW

In Table 1, 'HIGH' means no power saving state, and 'LOW' means power saving state including power off. That is, 'LOW' includes all of the power OFF or lowering the power level.

The network terminal may obtain a next frame state and a vehicle state to determine a current power control level for the power consumption object, and control the power consumption of the power consumption object. For example, when the state of the next frame is a state in which there is no next transmission packet and the state of the vehicle is a plane takeoff situation, the network terminal determines the power control level to be level 2, and the power consumption object according to the power control level 2. It is possible to control the power consumption of the.

Table 1 shows an example of the power profile, and includes the BAG controller, scheduler, redundancy manager (Tx), frame generator, redundancy manager (Rx), and integrity checker included in Table 1. In addition to the Integrity Checker, power consumption levels can be defined for other power consumption objects. In addition, the power consumption step may be defined by further subdividing the power consumption objects included in Table 1. Power consumption stages may be defined for each processor, motherboard, memory adapter, and the like.

Referring to FIG. 3, the network terminal includes a transmitting module 310 and a receiving module 320. The transmission module 310 includes a BAG controller 311, a scheduler 313, a frame buffer 314, a redundancy manager 316, and a frame generator 317. The receiving module 320 includes an FCS checker (Frame Check Sequence Checker) 321, an integrity checker (322), a redundancy manager (323), a buffer (324), and a multiplexer ( 325 and FIFO (First In, First Out) buffer 326.

The transmitting module 310 generates a frame based on the received data and transmits the frame through the virtual link. The BAG controller 311 includes at least one BAG timer 312 for timing whether the minimum transmission interval BAG has elapsed. The BAG controller 311 may check whether the minimum transmission interval has elapsed for each virtual link through the at least one BAG timer 312. When a data transmission command is received, the BAG controller 311 drives the BAG timer 312 corresponding to the virtual link to transmit the data, and requests the scheduler 313 to transmit the data. The data to be transmitted is stored in the memory 315 of the frame buffer 314. The frame buffer 314 may include at least one memory 315.

The scheduler 313 selects a virtual link to transmit data and provides the selection information vl_select to the redundancy manager 316. When the start message rm_start is received, the redundancy manager 316 provides a memory address in which data to be transmitted is stored in the frame buffer 314, and the frame buffer 314 provides redundancy manager 316 in the data stored at the received address. To provide.

When the data is received, the redundancy manager 316 transmits a transmission start message tx_start to the frame generator 317 corresponding to the selected virtual link, and the frame generator 317 reads data from the redundancy manager 316. The transmission module 310 may include at least one frame generator 317.

When the data starts to be read, the frame generator 317 transmits a data read start message read_start to the redundancy manager 316, and when all the data is read, the redundancy manager 316 sends an end message (frame) to the frame generator 317. data_en). The frame generator 317 encapsulates the received data to generate a frame, and transmits the generated frame over a virtual link.

At the start of transmission and the end of transmission, the redundancy manager 316 transmits a transmission start message tx_start and a transmission type message tx_done to the scheduler 313, respectively, and the scheduler 313 transmits a transmission start message to the BAG controller 311. (tx_start) and a transmission type message (tx_done) are transmitted.

The receiving module 320 receives the frame via the virtual link. When a frame is received through the virtual link, the frame check sequence (FCS) checker 321 detects an error of a frame received through the virtual link. For example, the FCS checker 321 detects whether an error has occurred by comparing the FCS owned by the FCS with the FCS of the received frame.

The FCS checker 321 transmits an error occurrence message err to the integrity checker 322, and the integrity checker 322 checks the integrity of the received frame. If the frame is valid, the integrity checker 322 sends a valid message to the redundancy manager 323 and the frame to the buffer 324. The redundancy manager 323 transmits a switching message sw and an interrupt message to the multiplexer 325 and the FIFO buffer 326 according to timing. The multiplexer 325 selects the buffer 324 according to the switching signal to receive the frame, and transmits the received frame to the FIFO buffer 326. The FIFO buffer 326 sends the received frame and interrupt messages to the destination.

The energy manager 330 may receive transmitter timing information and receiver timing information from the scheduler 313 and the redundancy manager 323 of the transmission module 310, respectively, and control power consumption of the power consumption object.

In one embodiment, the network terminal may control the power consumption for the power consumption object by reflecting the virtual link characteristics determined based on the endpoints of the virtual link. The network terminal may determine the current power control level for the power consumption object using the virtual link characteristics and the power profile determined based on the endpoints of the virtual link.

The virtual link characteristic includes at least one power level that can transition during the power consumption phases on the power profile. For example, a power consumption object connected by a virtual link having a first characteristic (emergency) can only transition to power control level 0, and a power consumption object connected by a virtual link having a second characteristic (an important virtual link at takeoff) is Power control level 2 is not possible to transition (i.e. power off during aircraft takeoff), and power consumption objects connected to a virtual link having a third characteristic (significant virtual link during landing) cannot transition to power control level 4 (i.e. It may not be possible to turn off the power in an airplane landing situation.

4A illustrates a frame transmission and reception process between network terminals when a next frame is generated before the minimum transmission interval (BAG) elapses. Hereinafter, for convenience of description, it will be described on the assumption that the transmitting network terminal is the end system 120 and the receiving network terminal is the switch 130.

Referring to FIG. 4A, the end system 120 transmits the generated first frame and transmits the second frame after the minimum transmission intervals BAG and T2 between the frames pass. The reception of the first frame is started by the switch 130 after the Tp (propagation time) elapses from when the end system 120 transmits the first frame. It takes T1 time for the switch 130 to receive all of the first frames. Here, T1 may be expressed as T1 = (frame length [bit]) / (link speed [b / s]).

The end system 120 can transmit the next frame (second frame) from the time when the transmission of the first frame is completed (from the time when the transmission of the first frame starts from the time when the minimum transmission interval (BAG) has elapsed). Can be predicted as a period in which no frame is transmitted. This section corresponds to an idle section T3 (T3 = T2-T1). The switch 130 may predict that the frame is not received from the end of the reception of the first frame until the time when the next frame (the second frame) is received. This section corresponds to the idle section T4 (T4 = T2-T1).

The end system 120 controls the power consumption of the end system 120 from the end of the transmission of the first frame to before the current minimum transmission interval elapses. The end system 120 may release power control and transmit a second frame to the switch 130 before the current minimum transmission interval elapses.

The switch 130 controls power consumption of the switch 130 after the reception of the first frame ends until the second frame is received. The switch 130 may release power consumption control and receive the second frame before the second frame is received.

In one embodiment, the end system 120 checks whether the current minimum transmission interval is less than or equal to a certain time before controlling the power consumption to control power consumption when there is no next frame, and power consumption when there is a next frame. Can be maintained. For example, if the current minimum transmission interval remains below a preset time after transmission of a frame ends and there is a next frame, the end system 120 maintains the current power consumption, and if there is no next frame. Power consumption can be controlled. FIG. 4A is a diagram illustrating a case where there is no d1 or d2 time considered in FIG. 4B for convenience of description.

4B illustrates a process performed by the transmitting network terminal when a next frame is generated before the minimum transmission interval (BAG) elapses.

Referring to FIG. 4B, when a first frame 410 is generated in an upper layer of the end system 120 (the transmitting network terminal) and a transmission is requested, a lower layer (for example, The ARINC 664 layer transmits the first frame 410 based on the maximum transmission length Lmax of the frame set in the virtual link for transmitting the corresponding frame and the minimum transmission interval BAG between the frames.

When the power consumption controlled state of the end system 120 (eg, the transmission module is in the OFF state), the power consumption control state may be released (eg, the transmission module is turned on) and the first frame may be transmitted. If it is assumed that d1 time is required to release the power consumption control state (for example, the transmission module is ON), the lower layer transmits the first frame from the time when p time has elapsed since the transmission was requested. do.

After transmitting the first frame, the end system 120 controls the power consumption. When it is assumed that d2 time is required for power consumption control (for example, the transmission module is OFF), power consumption may be controlled after d2 time elapses after the first frame 410 is transmitted, thereby reducing power consumption. .

Since the d1 time is required to release the power consumption control state (eg, the transmission module is ON), the end system 120 may control the power consumption before the d1 time from the elapse of the current minimum transmission interval (BAG). When the second frame 420 is generated in the upper layer in the power consumption control period and the transmission is requested, the lower layer may transmit the second frame 420 from the time when the minimum transmission interval BAG elapses. The end system 120 may control the power consumption again after the d2 time elapses after the second frame 420 is transmitted.

5A illustrates a frame transmission / reception process between network terminals when a next frame is generated after a minimum transmission interval (BAG) has elapsed. Hereinafter, for convenience of description, it will be described on the assumption that the transmitting network terminal is the end system 120 and the receiving network terminal is the switch 130.

Referring to FIG. 5A, the end system 120 may transmit the generated first frame, and transmit the second frame after the minimum transmission intervals BAG and T2 between the frames pass. Receipt of the first frame is started by the switch 130 after Tp (propagation time) has elapsed from when the end system 120 transmits the first frame. It takes T1 time for the switch 130 to receive all of the first frames.

If the second frame is generated after T5 time has elapsed after the minimum transmission intervals (BAG, T2), the end system 120 starts from the time T2 + T5 time has elapsed since the first frame was generated and transmission started. Send the second frame.

The end system 120 ends from the end of the transmission of the first frame until the time at which the next frame (second frame) is transmitted (from the time when the first frame is generated and the transmission starts from the time T2 + T5 has elapsed). The power consumption of the system 120 can be controlled. The end system 120 may release power control and transmit the second frame before transmitting the second frame.

The switch 130 may control the power consumption of the switch 130 after the reception of the first frame ends until the second frame is received (a time point T4 + T6 has elapsed). The switch 130 may release power consumption control and receive the second frame before the second frame is received.

In one embodiment, the end system 120 checks whether there is a next frame before the current minimum transmission interval elapses and maintains a power consumption control state if there is no next frame, and if there is a next frame, power consumption. Control can be released.

5B illustrates a process performed by the transmitting network terminal when the next frame is generated after the minimum transmission interval (BAG) has elapsed.

Referring to FIG. 5B, when a first frame 510 is generated in an upper layer of the end system 120 (the transmitting network terminal) and a transmission is requested, a lower layer (for example, The ARINC 664 layer transmits the first frame 510 based on the maximum transmission length Lmax of the frame set in the virtual link for transmitting the frame and the minimum transmission interval BAG between the frames.

After transmitting the first frame 510, the end system 120 controls the power consumption. If it is assumed that d2 time is required to control power consumption (for example, the transmission module is OFF), power consumption may be controlled after d2 time elapses after the first frame 510 is transmitted, thereby reducing power consumption. .

The end system 120 maintains the power consumption control state when there is no next frame by checking whether there is a next frame before the current minimum transmission interval elapses. When the second frame 520 is generated after p1 time elapses from the current minimum transmission interval (BAG) elapsed time, and the transmission is requested, the end system 120 generates the second frame 520 and requests for transmission. The power consumption control state can be maintained until this point in time.

The lower layer may transmit the second frame 520 from the time point at which the p1 + p2 time elapses from the time point at which the minimum transmission interval BAG has elapsed. The p2 time is a sum of the generation time of the second frame 520 and the power consumption control state release time d1.

The end system 120 may control the power consumption again after the d2 time elapses after the second frame 520 is transmitted.

The network terminal may be connected to another network terminal through at least one virtual link defined through the maximum transmission length Lmax of the frame and the minimum transmission interval BAG between the frames. When at least one virtual link is connected to the network terminal, if no current frame is being transmitted on the at least one virtual link, the network terminal analyzes all minimum transmission intervals of the at least one virtual link and when the closest minimum transmission interval has elapsed. Up to power consumption can be controlled.

Hereinafter, for convenience of description, it will be described on the assumption that the transmitting network terminal is the end system 120.

For example, as shown in FIG. 6, if there are four

applications

110a, 110b, 110c, 110d in the end system 120 and a virtual link is connected to each application, the end system 120 has four It may be connected to the switch 130 through the virtual link.

In the four

applications

110a, 110b, 110c, and 110d, data is generated at an arbitrary time. Data generated by each of the

applications

110a, 110b, 110c, and 110d is stored in the

first queuing buffers

610a, 610b, 610c, and 610d corresponding to the corresponding application. The multiplexer 620 second queues the data stored in the

first queuing buffers

610a, 610b, 610c, and 610d in consideration of the minimum transmission interval (BAG) of the virtual link corresponding to each

application

110a, 110b, 110c, and 110d. Stored in the buffer 630. Data stored in the second queuing buffer 630 is encapsulated and transmitted in order to the network in consideration of the minimum transmission interval (BAG) of each virtual link.

The end system 120 may analyze all minimum transmission intervals of each virtual link to control power consumption in a section in which all the virtual links do not transmit a frame. In one embodiment, the end system 120 generates (or prepares) a virtual link usage state map representing each virtual link and the usage state. In one embodiment, the virtual link usage state map includes identification of each virtual link, a maximum transmission length (Lmax) of a frame set in each virtual link, a minimum transmission interval (BAG) between frames, and a time of a minimum transmission interval timer. can do.

If a current frame is not being transmitted in each virtual link, the end system 120 may control power consumption in a section in which all the virtual links do not transmit a frame based on the virtual link usage state map. For example, the end system 120 may analyze all minimum transmission intervals of the virtual link to control power consumption until the closest minimum transmission interval has elapsed.

FIG. 7 is a diagram illustrating a specific process of a network method performed in the network terminal of FIG. 6, and FIG. 8 is a diagram illustrating a virtual link usage state map.

In FIG. 7, the end system 120 transmits the second frame 720 through the second virtual link at a time point 2 ms after transmitting the first frame 710 through the third virtual link. After the frame 720 is transmitted, the third frame 730 is transmitted through the fourth virtual link at 2ms elapsed, and the first virtual link at 1ms elapses after the third frame 730 is transmitted. The fourth frame 740 is transmitted through.

The end system 120 may reduce power consumption by analyzing a minimum transmission interval (BAG) of each virtual link to control power in a period in which all the virtual links do not transmit a frame. In one embodiment, the end system 120 controls the power consumption when the period in which all the virtual links do not transmit a frame is more than a predetermined time (for example, a predetermined time), and when the time is within a certain time, the power consumption. It is possible to maintain the current power consumption without controlling.

For example, in FIG. 6, the end system 120 is currently consumed since there is a next frame to be transmitted within a certain time after the first frame 710 is transmitted, after the second frame 720 is transmitted, and after the third frame 730 is transmitted. Maintain power.

When the fifth frame 750 is transmitted over the second virtual link 29 ms after the transmission time of the fourth frame 740, the end system 120 does not transmit the frame for more time than the preset time. To control. If power consumption control (eg transmission module OFF) takes d1 time, and power consumption control release (eg transmission module ON) takes d2 time, end system 120 is 't + t'. _The power consumption may be controlled from the time _VL _{# 1} + d1 '(t _VL _{# 1} is the time required to transmit the corresponding frame in the first virtual link) to the time “t + 29-d2”. The end system 120 releases power consumption control at time 't + 29-d2' and transmits the fifth frame 750.

When the sixth frame 760 is transmitted over the second virtual link 30 ms after the transmission time of the fifth frame 750, the end system 120 does not transmit the frame for more time than the preset time. After transmitting 750, the power consumption is again controlled.

FIG. 8 illustrates a virtual link usage state map at 't' time, 't + 29ms' time and 't + 59ms' time in FIG. 7. In FIG. 8, it is assumed that the minimum transmission intervals BAG of the first virtual link, the second virtual link, the third virtual link, and the fourth virtual link are 128 ms, 32 ms, 64 ms, and 128 ms, respectively.

At 't' time, the minimum transmission interval (BAG) timer of the first virtual link is 0 ms, the minimum transmission interval timer of the second virtual link is 29 ms, and the minimum transmission interval timer of the third virtual link is 59 ms, and the minimum transmission interval timer of the fourth virtual link has a time of 127 ms.

In the case of the first virtual link, since the minimum transmission interval has elapsed after transmitting the previous frame, the end system 120 may transmit the next frame through the first virtual link at 't' time. The end system 120 may transmit the next frame through the first virtual link at 't' time, analyze all minimum transmission intervals of the virtual link, and control power consumption until the closest minimum transmission interval has elapsed. .

For example, based on the virtual link usage state map of FIG. 8, all minimum transmission intervals of the virtual link are analyzed and the time point at which the next closest transmission interval elapses is 't + 29ms' time (second virtual link). In this case, the end system 120 _selects 't + t _{VL # 1} + d1' at the 't' time, where t _{VL # 1} is the time required to transmit the corresponding frame on the first virtual link. Power consumption can be controlled up to the d2 'time.

The end system 120 transmits the next frame through the second virtual link at time 't + 29ms', analyzes all the minimum transmission intervals of the virtual link, and then closes the closest minimum transmission interval (t + 29ms + 30ms, the third virtual). The power consumption can be controlled again until the elapse of the link).

Referring to FIG. 9, the network terminal of the transmitting side transitions to the IDLE state 910 when the power is turned on. If there is a request for generation and transmission of a frame in the IDLE 910 state, the transmitting network terminal transitions to the PENDING state 920 and starts a minimum transmission interval (BAG) timer.

When the channel state to which a frame is to be transmitted is IDLE and the frame is ready to be transmitted, the transmitting network terminal transitions to the SEND state 930 and transmits the frame. If the transmission module is in the power consumption control state (eg, the transmission module is OFF), the network terminal may release the power consumption control state of the transmission module (eg, the transmission module is ON) and transmit the frame. After transmitting the frame, the network terminal transitions from the SEND state 930 to the IDLE state 910 and controls the power consumption of the transmitting module. The network terminal may reduce power consumption by controlling the power consumption of the transmitting module until the next SEND state becomes the power consumption control state is released.

In the PENDING state 920, when the maximum waiting time is exceeded due to transmission of another frame or the like, when an error occurs, such as when an error occurs on another system and initialization is initiated, the network terminal enters the PENDING state 920. Transitions to the ERROR state 940 and after completing the error processing, transitions to the IDLE state 910 again.

Even in the SEND state 930, the network terminal transitions to the ERROR state 940 even when an error occurs, such as when an error occurs during transmission or an error occurs in other systems.

Referring to FIG. 10, the receiving side network terminal transitions to the WAIT state 1010 when the power is turned on.

When a new frame is received in the WAIT state 1010, the receiving network terminal transitions from the WAIT state 1010 to the RECV state 1020 and maintains the RECV state 1020 until all the frames are received.

When the frame reception is completed, the new network terminal transitions from the RECV state 1020 to the SLEEP state 1030, the minimum transmission interval (BAG) timer is started, and the power consumption of the receiving module is controlled.

In SLEEP state 1030, the minimum transmission interval (BAG) timer is started, and the power consumption of the receiving module is controlled. When the minimum transmission interval (BAG) timer has elapsed (that is, the minimum transmission interval time has elapsed), the receiving network terminal transitions from the SLEEP state 1030 to the WAIT state 1010, and the power consumption control of the receiving module is released. .

In the present invention, it is possible to save power while ensuring the stability of the driving means by determining the power control level for the power consumption object according to the state of the driving means.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art various modifications and changes to the present application without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

(a) connecting with another network terminal via a virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between the frames;

(b) transmitting a current frame over the virtual link; And

and (c) controlling the power consumption when the current frame is transmitted until the current minimum transmission interval elapses.
The method of claim 1, wherein step (c)

Checking whether the current minimum transmission interval is equal to or less than a specific time before controlling the power consumption, and if the next frame is not present, controlling the power consumption of the network terminal on the profile network. Power control method.
The method of claim 2, wherein step (c)

And maintaining the power consumption when the next frame is present.
The method of claim 1, wherein step (c)

Obtaining a power profile for at least one power consumption object in said network terminal.
The method of claim 2, wherein step (c)

Determining a current power control level by acquiring a next frame state and a vehicle state; and determining a current power control level.
The method of claim 4, wherein step (c)

Controlling the power consumption of the at least one power consuming object according to the obtained power profile before the current minimum transmission interval has elapsed and the next frame is generated. Method of controlling power consumption of the terminal.
The power profile of claim 4 wherein the power profile is

And controlling power consumption reflecting a virtual link characteristic determined based on endpoints of the virtual link.
8. The method of claim 7, wherein the virtual link characteristic is

And at least one power level that is transitionable among the power consumption steps on the power profile.
(a) connecting with another network terminal through at least one virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between frames; And

(b) analyzing all minimum transmission intervals of the at least one virtual link if no current frame is being transmitted on the at least one virtual link and controlling power consumption until the closest minimum transmission interval has elapsed; A method of controlling power consumption of a network terminal on a profile network.
The method of claim 9, wherein step (b)

Determining whether a virtual link having a power uncontrollable level defined by a power profile is included in the at least one virtual link.
The method of claim 10, wherein step (b)

And controlling the power consumption object not to lower the power when the virtual link of the power control impossibility level is identified.
The method of claim 9,

Preparing a virtual link use state map indicating the at least one virtual link and the use state;

And (b) controlling power consumption until the closest minimum transmission interval has elapsed based on the virtual link usage state map. .
A first network terminal; And

And a second network terminal connected to the first network terminal through a virtual link defined through a maximum transmission length of a frame and a minimum transmission interval between frames,

And the first network terminal controls power consumption until a current minimum transmission interval elapses when a current frame is transmitted.
The method of claim 13, wherein the first network terminal

And controlling a power consumption by acquiring a power profile of at least one power consumption object in the network terminal.
The method of claim 14, wherein the first network terminal

And controlling the power consumption of the at least one power consumption object according to the obtained power profile before the current minimum transmission interval elapses and the next frame is generated.