WO2012001753A1 - Dispositif de commande d'accès - Google Patents

Dispositif de commande d'accès Download PDF

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Publication number
WO2012001753A1
WO2012001753A1 PCT/JP2010/006810 JP2010006810W WO2012001753A1 WO 2012001753 A1 WO2012001753 A1 WO 2012001753A1 JP 2010006810 W JP2010006810 W JP 2010006810W WO 2012001753 A1 WO2012001753 A1 WO 2012001753A1
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WO
WIPO (PCT)
Prior art keywords
unit
layer device
physical layer
transmission
low power
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Application number
PCT/JP2010/006810
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English (en)
Japanese (ja)
Inventor
石井宏明
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パナソニック株式会社
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Filing date
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2012001753A1 publication Critical patent/WO2012001753A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40039—Details regarding the setting of the power status of a node according to activity on the bus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the present invention relates to an access control device, and more particularly to a technology for suppressing power consumption of a communication device via a network.
  • Interfaces of these devices include wired or wireless interfaces, and wired networks that comply with the IEEE 802.3 standard and wireless networks that comply with the IEEE 802.11 standard are widely used.
  • the communication speed of personal computers and digital home appliances used at home has been generally 10 Mbps or 100 Mbps so far, but in recent years, higher speed Gigabit LANs have become widespread. ing.
  • communication between a physical (PHY) layer device and a MAC (Media Access Control) layer device performed at 25 MHz when communicating via MII (Media Independent Interface) at 100 Mbps.
  • MII Media Independent Interface
  • the signal is transferred at 125 MHz via GMII (Gigabit Media Independent Interface). For this reason, power consumption for each terminal has been increased along with an increase in operation speed.
  • Non-Patent Document 1 a method for performing flow control by communication between LAN terminals is defined. Specifically, when the flow control frame is received, the transmission stop time is extracted by the QUANTA extraction unit. Thereafter, when the normal reception detection unit detects that the flow control frame has been correctly received, the non-transmission detection unit confirms that the transmission operation is not performed, and then the transmission control unit stops the transmission operation. Thereafter, when only the stop time elapses, the transmission control unit resumes the transmission operation.
  • a method of reducing power by reducing the power of the reception system circuit when not receiving has been proposed.
  • this method for example, at the time of wireless LAN communication, since the reception timing of the beacon transmitted from the master is known in advance, the reception system circuit can be stopped when the data is not received by itself. Was able to drop.
  • these networks are premised on the presence of a terminal serving as a master, it is difficult to perform the same control in a LAN where this terminal does not exist.
  • Patent Document 1 while receiving instructions from the other terminal to stop transmission to the own terminal by transmitting a flow control frame to the other terminal and suppressing transmission to the own terminal, reception of the own terminal Attempts have been made to shut down the system.
  • Patent Document 2 when a plurality of communication traffic flows through one port, there is a method of performing logical flow control for each stream by logically embedding traffic identification information in a flow control frame. Proposed.
  • an interface between a physical layer device and a MAC layer device for putting the physical layer device into a low power state is defined, and the MAC layer device instructs the physical layer device to control power. For example, when the communication rate is not so high, the physical layer device can be dynamically changed to a low power state. However, on the other hand, under what conditions power control should be performed is undefined, and a control method for achieving both communication performance and power consumption reduction is required.
  • An object of the present invention is to detect a free time during non-communication and to control the power of a physical layer device connected to the outside while considering the time required for recovery, thereby reducing the power saving function without losing the communication band. Is to realize.
  • a transmission data storage unit that temporarily stores transmission data, a transmission unit that outputs data to the physical layer device, and a transmission stacked in the transmission data storage unit
  • a transmission control unit that converts packets into a form that can be transmitted to the network and transmits them
  • a reception data storage unit that temporarily stores packets received from the network, a reception unit that inputs data from the network, and a network input
  • a reception control unit that converts data so that data can be stored in the reception data storage unit
  • a QUANTA extraction unit that extracts a transmission stop time included in the frame when a flow control frame is received, and a flow control frame correctly
  • a normal reception detection unit that detects the completion of reception and a transmission control unit that detects when normal reception is detected.
  • the transmission rate is high by providing an LPI (Low Power Idle) control unit that instructs the physical layer device to transition to the low power state when it is detected that there is no next transmission packet during the period Since the timing at which data starts to be accumulated in the transmission data storage unit is before the timer expires, the transition to the low power state of the physical layer device by the LPI control unit is not performed.
  • LPI Low Power Idle
  • the comparison unit determines that the extracted time is larger than the value instructed by the PAUSE threshold setting unit, and determines that the extracted time should be changed to the low power state, the physical layer device is set to the low power state with respect to the LPI control unit. Instruct to make a transition.
  • the LPI control unit includes, for example, a state management unit and a timer.
  • the state management unit transitions to the LPI state and validates the terminal switching control signal. Further, the terminal switching unit changes the terminal state and sets the terminal state to a low power state defined by the physical layer device.
  • the terminal switching control signal is invalidated, and the terminal switching unit returns the terminal state to the normal communication state. At this time, the terminal is in a normal communication state.
  • a timer is started, and control is performed so as not to transition to the low power state again until a predetermined time. By doing so, power control of the physical layer device can be stably performed.
  • the power consumption of the physical layer device can be reduced when it is not necessary to transmit a packet in the transmission system, and the physical layer device can be used even when transmission is stopped in response to reception of a flow control frame in the reception system. Power consumption can be reduced without degrading communication performance.
  • FIG. 1 is a configuration diagram of an access control apparatus according to the first embodiment of the present invention.
  • 100 is a physical (PHY) layer device
  • 101 is a transmission data storage unit
  • 102 is a transmission unit
  • 103 is a transmission control unit
  • 104 is a reception data storage unit
  • 105 is a reception unit
  • 106 is a reception control unit
  • 107 Is a non-transmission detection unit
  • 108 is a normal reception detection unit
  • 109 is a QUANTA extraction unit
  • 201 is a timer
  • 202 is a transmission request detection unit
  • 203 is an LPI control unit
  • 204 is a terminal switching control signal
  • 205 is a terminal switching unit
  • 206 Is a comparison unit
  • 207 is a setting unit.
  • the access control device in FIG. 1 is capable of temporarily transmitting data input in a form having a certain bus width and transmitting the data stored in the transmission data storage unit 101 to an external network.
  • a transmission control unit 103 that transmits frames at intervals of a predetermined period or longer, a transmission request detection unit 202 that detects that data to be transmitted does not exist in the transmission data storage unit 101,
  • a timer 201 that measures a period in which no transmission data exists in the transmission data storage unit 101, a setting unit 207 that presets a waiting time for causing the physical layer device 100 to transition to a low power state, and the waiting time has elapsed.
  • a comparison unit 206 that determines that the physical layer device 100 and the MAC when the comparison unit 206 determines that the waiting time has elapsed. It comprises a terminal switching portion 205 to change the state of the interface between the device and a LPI controller 203 to instruct so as to shift the physical layer device 100 to the low power state.
  • the comparison unit 206 transitions the physical layer device 100 to the low power state when it detects that there is no data transmission request during the minimum interframe gap (IFG) defined in the IEEE 802.3 standard after frame transmission is completed. Alternatively, when the comparison unit 206 detects that there is no data transmission request during the startup time (Tw_sys) of the physical layer device 100 defined by the IEEE 802.3az standard after completion of frame transmission, the comparison unit 206 reduces the physical layer device 100 to a low level. Transition to the power state. Alternatively, the comparison unit 206 causes the physical layer device 100 to transition to the low power state when there is no transmission request during the waiting time instructed by the setting unit 207.
  • IDG minimum interframe gap
  • Tw_sys startup time
  • the comparison unit 206 causes the physical layer device 100 to transition to the low power state when there is no transmission request during the waiting time instructed by the setting unit 207.
  • the LPI control unit 203 After returning the physical layer device 100 from the low power state, the LPI control unit 203 lowers the physical layer device 100 again during the start-up time (Tw_sys) of the physical layer device 100 defined by the IEEE 802.3az standard. Do not transition to power state.
  • a FIFO First-In / First-Out type memory
  • the FIFO is composed of a write pointer indicating a data write position, a read pointer indicating a data read position, and a storage area for storing data.
  • the read pointer and the write pointer are at the same position.
  • each word is written to the FIFO one by one.
  • the write pointer moves to a position indicating the next write position.
  • the write pointer advances further. By repeating this, the entire transmission packet is written into the FIFO.
  • the transmission control unit 103 starts transmitting the packet and transmits the packet data in the FIFO.
  • packet transmission is started, data is read out one word at a time by the transmission unit 102, and the read pointer advances to the next reading position in order.
  • a transmission completion notification is transmitted from the transmission control unit 103 to the transmission request detecting unit 202, and the positions of the write pointer and the read pointer of the FIFO again match, and the FIFO is empty. This is notified to the transmission request detection unit 202.
  • the transmission request detection unit 202 When the transmission request detection unit 202 receives the transmission completion notification and the notification that the FIFO is empty, it instructs the timer 201 to start measuring time. When the time measurement is started in the timer 201, the comparison unit 206 performs a coincidence comparison with the stop time value set in the setting unit 207 configured by a register. The comparison result is notified to the transmission request detection unit 202. When the comparison results match, the transmission request detection unit 202 notifies the LPI control unit 203 of the low power state transition request of the physical layer device 100.
  • the terminal switching control signal 204 is validated and a low power state in which the physical layer device 100 defines the terminal state is specified to the terminal switching unit 205. Fix as shown.
  • the LPI control unit 203 enables the terminal switching control signal 204, if data starts to be loaded into the FIFO, the write pointer advances, so the comparison result between the read pointer and the write pointer becomes inconsistent,
  • the transmission request detection unit 202 is notified that the FIFO is no longer empty.
  • the transmission request detection unit 202 notifies the LPI control unit 203 of a request for returning the physical layer device 100 from the low power state.
  • the LPI control unit 203 invalidates the terminal switching control signal 204, cancels the control by the terminal switching unit 205, and returns the terminal state to the normal communication state.
  • the power consumption of the physical layer device 100 can be reduced when it is not necessary to transmit a packet in the transmission system.
  • FIG. 2 is a configuration diagram of an access control apparatus according to the second embodiment of the present invention.
  • 100 is a physical layer device
  • 101 is a transmission data storage unit
  • 102 is a transmission unit
  • 103 is a transmission control unit
  • 104 is a reception data storage unit
  • 105 is a reception unit
  • 106 is a reception control unit
  • 107 is not transmitted.
  • the access control apparatus of FIG. 2 can store input data in a form having a certain bus width when data input from the interface between the physical layer device 100 and the MAC layer device is not a flow control frame.
  • a reception control unit 106 for conversion, a reception data storage unit 104 for storing data output from the reception control unit 106, and data input from an interface between the physical layer device 100 and the MAC layer device are flow control frames.
  • the QUANTA extraction unit 109 that extracts the transmission stop time included in the flow control frame, the normal reception detection unit 108 that detects that the flow control frame has been normally received, and the flow control frame is correctly received.
  • An unsent detector 107 that detects that the sending side is in an unsent state when it can be done.
  • a PAUSE threshold value setting unit 303 that selects a transmission stop period threshold value in advance
  • a comparison unit 302 that compares the transmission stop time extracted by the QUANTA extraction unit 109 with the threshold value selected by the PAUSE threshold value setting unit 303, and the comparison unit
  • the LPI control unit 203 that instructs the physical layer device 100 to transition to the low power state and the physical layer device 100 are set to the low power state.
  • a timer 301 for measuring the period of transition.
  • the comparison unit 302 instructs the LPI control unit 203 to transition to the low power state when the transmission stop time extracted by the QUANTA extraction unit 109 is a value other than 0. Alternatively, when the transmission stop time extracted by the QUANTA extraction unit 109 is equal to or greater than the output value of the PAUSE threshold setting unit 303, the comparison unit 302 causes the LPI control unit 203 to switch the physical layer device 100 to the low power state. Instruct a transition.
  • FIG. 3 shows a flow control frame 601 defined in Non-Patent Document 1.
  • 602 is a destination address (DA)
  • 603 is a source address (SA)
  • 604 is a control frame identifier
  • 605 is a flow control frame identifier
  • 606 is stopped.
  • FCS frame check sequence
  • the QUANTA extraction unit 109 extracts the transmission stop time 606. Thereafter, when reception up to the frame check sequence 607 is completed, the FCS of the received frame is calculated based on the FCS calculation method stipulated in Non-Patent Document 1, and the comparison with the FCS value included in the received frame is performed by the normal reception detection unit 108. If they match, it is determined that the reception was successful. When the comparison is completed, the non-transmission detection unit 107 detects that the transmission control unit 103 is not transmitting, and notifies the transmission control unit 103 of a flow control request.
  • the transmission stop time 606 extracted by the QUANTA extraction unit 109 is also set for the timer 301, and the comparison unit 302 is notified of the execution of the comparison.
  • the comparison unit 302 is notified of the execution of the comparison, the value input from the PAUSE threshold value setting unit 303 is compared with the value of the timer 301, and the value set in the timer 301 is the PAUSE threshold value setting unit 303.
  • the value is greater than or equal to the value input from, the low power state transition request of the physical layer device 100 is notified to the LPI control unit 203.
  • the terminal switching control signal 204 is validated and a low power state in which the physical layer device 100 defines the terminal state is specified to the terminal switching unit 205. Fix as shown.
  • the comparison unit 302 notifies the LPI control unit 203 of a request to return the physical layer device 100 from the low power state.
  • the LPI control unit 203 invalidates the terminal switching control signal 204, cancels the control by the terminal switching unit 205, and returns the terminal state to the normal communication state.
  • FIG. 4 is a detailed configuration diagram of the LPI control unit 203 in the first and second embodiments.
  • 203 is an LPI control unit
  • 401 is an LPI control signal
  • 402 is an LPI state management unit
  • 403 is a timer
  • 204 is a terminal switching control signal
  • 205 is a terminal switching unit.
  • the LPI state management unit 402 makes a transition from the clock-on state to the LPI state and enables the terminal switching control signal 204.
  • the terminal switching unit 205 changes the terminal state to the LPI state.
  • the control transitions from the LPI state to the clock-on state, the terminal switching control signal 204 becomes invalid, and the terminal switching unit The terminal state is returned to the normal state by 205.
  • time is measured by the timer 403 so that the physical layer device 100 does not transition to the LPI state again until the recovery from the power saving state is completed.
  • the power consumption of the physical layer device 100 can be reduced without degrading the communication performance even when transmission is stopped after receiving the flow control frame in the reception system.
  • FIG. 5 is a configuration diagram of an access control apparatus according to the third embodiment of the present invention.
  • 100 is a physical layer device
  • 101 is a transmission data storage unit
  • 102 is a transmission unit
  • 103 is a transmission control unit
  • 104 is a reception data storage unit
  • 105 is a reception unit
  • 106 is a reception control unit
  • 107 is not transmitted.
  • Detection unit, 108 normal reception detection unit, 109 QUANTA extraction unit, 203 LPI control unit, 204 terminal switching control signal, 205 terminal switching unit, 301 timer, 302 comparison unit, 303 PAUSE threshold setting unit , 501 are flag detection units.
  • the access control apparatus in FIG. 5 can store input data in a form having a certain bus width when data input from the interface between the physical layer device 100 and the MAC layer device is not a flow control frame.
  • a reception control unit 106 for conversion, a reception data storage unit 104 for storing data output from the reception control unit 106, and data input from an interface between the physical layer device 100 and the MAC layer device are flow control frames.
  • the QUANTA extraction unit 109 that extracts the transmission stop time included in the flow control frame, the normal reception detection unit 108 that detects that the flow control frame has been normally received, and the flow control frame is correctly received.
  • An unsent detector 107 that detects that the sending side is in an unsent state when it can be done.
  • a PAUSE threshold value setting unit 303 that selects a transmission stop period threshold value in advance
  • a comparison unit 302 that compares the transmission stop time extracted by the QUANTA extraction unit 109 with the threshold value selected by the PAUSE threshold value setting unit 303, and the comparison unit
  • the LPI control unit 203 that instructs the physical layer device 100 to transition to the low power state and the physical layer device 100 are set to the low power state.
  • a timer 301 that measures a transition period and a flag detection unit 501 that extracts a flag included in the flow control frame when the flow control frame is received.
  • the comparison unit 302 maintains the low power state of the physical layer device 100 with respect to the LPI control unit 203 even after completion of time measurement in the timer 301 when the flag detection unit 501 detects a flag in the received flow control frame. Instruct. In addition, when the flag detection unit 501 does not detect the flag when receiving the flow control frame, the comparison unit 302 stops the transmission of the physical layer device 100 after stopping the transmission stop time extracted by the QUANTA extraction unit 109. Instructs the return from the normal state to the normal transmission state.
  • FIG. 6 shows an extended flow control frame 701 that is uniquely defined by extending the flow control frame 601 defined in Non-Patent Document 1 uniquely.
  • a flag (FLAG) 702 is newly defined.
  • the transmission stop time 606 is extracted by the QUANTA extraction unit 109.
  • the flag detection unit 501 extracts the flag 702, and when the reception is completed up to the frame check sequence 607, the FCS of the received frame is calculated based on the FCS calculation method defined in Non-Patent Document 1, and is included in the received frame. Comparison with the FCS value is performed in the normal reception detection unit 108, and if they match, it is determined that normal reception has been achieved.
  • the non-transmission detection unit 107 detects that the transmission control unit 103 is not transmitting, and notifies the transmission control unit 103 of a flow control request.
  • the transmission stop time 606 extracted by the QUANTA extraction unit 109 and the flag 702 extracted by the flag detection unit 501 are also notified to the timer 301 to the timer 301.
  • the comparison unit 302 is notified of the execution of the comparison, the value input from the PAUSE threshold value setting unit 303 is compared with the value of the timer 301, and the value set in the timer 301 is the PAUSE threshold value setting unit 303.
  • the low power state transition request of the physical layer device 100 is notified to the LPI control unit 203.
  • the terminal switching control signal 204 is validated and a low power state in which the physical layer device 100 defines the terminal state is specified to the terminal switching unit 205. Fix as shown. Also, the transmission control unit 103 is instructed to stop transmission. When the count of the time set in the timer 301 expires, the comparison unit 302 confirms whether the flag 702 is set.
  • the comparison unit 302 does not notify the LPI control unit 203 of a return request from the low power state of the physical layer device 100.
  • the terminal switching control signal 204 remains valid, and the transmission control unit 103 remains instructed to stop transmission. Thereafter, when the flow control frame is received again, if the flag is not set and the transmission stop time 606 extracted by the QUANTA extraction unit 109 indicates 0, the LPI control unit in the comparison unit 302 203 notifies the physical layer device 100 of a return request from the low power state.
  • the LPI control unit 203 invalidates the terminal switching control signal 204, cancels the control by the terminal switching unit 205, and returns the terminal state to the normal communication state.
  • the timer 301 counts the transmission stop time 606 and then the comparison unit 302
  • the LPI control unit 203 is notified of a return request from the low power state of the physical layer device 100.
  • the LPI control unit 203 invalidates the terminal switching control signal 204, cancels the control by the terminal switching unit 205, and returns the terminal state to the normal communication state.
  • the LPI control unit 203 is notified of a request to return the physical layer device 100 from the low power state.
  • the LPI control unit 203 invalidates the terminal switching control signal 204, cancels the control by the terminal switching unit 205, and returns the terminal state to the normal communication state.
  • the physical layer device 100 when the flag included in the frame is set when the flow control frame is received, the physical layer device 100 is stopped in the low power consumption mode even after the transmission stop time has elapsed. Thus, efficient power control can be performed.
  • the access control device of the present invention in a digital home appliance that is required to have low power consumption, power consumption when the device is not communicating or when the device is not operating Can be reduced. Further, according to the present invention, even in a personal computer, it is possible to reduce power when there is no communication.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

Pendant la transmission, si une durée pendant laquelle un paquet n'est pas transmis est égale ou supérieure à un laps de temps prédéterminé, une unité de commutation de terminal (205) est commandée par une unité de détection de demande de transmission (202), une unité de commande LPI (203) , une unité de comparaison (206), et une unité de configuration (207), pour faire passer un dispositif de couche physique (100) en mode d'économie d'énergie. Pendant la réception, lorsqu'une trame de commande de flux est reçue, si les informations de temps d'arrêt contenues dans la trame demandent l'arrêt pendant un temps égal ou supérieur à un laps de temps prédéterminé, une commande de puissance électrique est réalisée de telle sorte qu'une commande de puissance électrique puisse être effectuée sans nuire aux performances de communication. En outre, lorsque la trame de commande de flux est reçue, si un drapeau contenu dans la trame est défini, le dispositif de couche physique reste dans le mode de faible consommation d'énergie après que le temps d'arrêt de transmission s'est écoulé, de façon à réaliser une commande efficace de la puissance électrique.
PCT/JP2010/006810 2010-06-28 2010-11-19 Dispositif de commande d'accès WO2012001753A1 (fr)

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Application Number Priority Date Filing Date Title
JP2010-146127 2010-06-28
JP2010146127 2010-06-28

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WO2012001753A1 true WO2012001753A1 (fr) 2012-01-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013223173A (ja) * 2012-04-18 2013-10-28 Konica Minolta Inc 画像形成装置
JP2015513859A (ja) * 2012-03-05 2015-05-14 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ レガシーモードにおいて動作するギガビット媒体独立インターフェースのための低電力アイドルシグナリング

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006135397A (ja) * 2004-11-02 2006-05-25 Seiko Epson Corp データ転送制御装置及び電子機器
JP2010136008A (ja) * 2008-12-03 2010-06-17 Mitsubishi Electric Corp ネットワーク構成装置、管理装置および通信ネットワーク
JP2010141881A (ja) * 2008-11-13 2010-06-24 Ricoh Co Ltd ネットワークシステム、ネットワーク制御方法、ｌａｎスイッチ及びネットワーク制御プログラム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006135397A (ja) * 2004-11-02 2006-05-25 Seiko Epson Corp データ転送制御装置及び電子機器
JP2010141881A (ja) * 2008-11-13 2010-06-24 Ricoh Co Ltd ネットワークシステム、ネットワーク制御方法、ｌａｎスイッチ及びネットワーク制御プログラム
JP2010136008A (ja) * 2008-12-03 2010-06-17 Mitsubishi Electric Corp ネットワーク構成装置、管理装置および通信ネットワーク

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015513859A (ja) * 2012-03-05 2015-05-14 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ レガシーモードにおいて動作するギガビット媒体独立インターフェースのための低電力アイドルシグナリング
US9552040B2 (en) 2012-03-05 2017-01-24 Qualcomm Incorporated Low power idle signaling for gigabit media independent interfaces operating in legacy modes
KR101750053B1 (ko) 2012-03-05 2017-06-22 퀄컴 인코포레이티드 레거시 모드들에서 동작하는 기가비트 미디어 독립적인 인터페이스들을 위한 저전력 유휴 시그널링
JP2013223173A (ja) * 2012-04-18 2013-10-28 Konica Minolta Inc 画像形成装置

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