CN103731762A - Systems and methods for advanced power management for optical network terminal systems on chip - Google Patents
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Abstract
The embodiment of the invention refers to systems and methods for advanced power management for optical network terminal systems on chip. Systems and methods are provided for customer premises equipment (CPE) on a passive optical network (PON). A system includes a packet processor having at least an active mode and a sleep mode, the packet processor configured to processes streams of data packets received in a data plane from an optical line terminal (OLT) through the PON when in an active mode and to enter the sleep mode when not receiving data packets in the data plane. A system further includes a micro-controller, separate from the packet processor, configured to receive from an OLT operation and management (OAM) messages that are transmitted in a control plane, and to process the OAM messages by, selectively transmitting to a central office, without waking up the packet processor, an acknowledgement message, or waking up the packet processor to receive data packets in the data plane.
Description
the cross reference of related application
The application requires to being incorporated into by reference and completely this, in submitting on 1O 15th, 2012, name be called " Advanced Power Management for ONT SOCs " the 61/713rd, the priority of No. 876 U.S. Provisional Applications.
Technical field
Present disclosure relates in general to network service, and the power relating more specifically in optical communication network is saved.
Background technology
Optical line terminal (OLT) equipment is as the ISP's endpoint operation in EPON (PON).Between the signal of telecommunication that OLT is used at ISP's equipment and the fiber-optic signal transmitting by PON, change.OLT equipment to a plurality of customer premises equipment, CPEs unit (CPE) continuously with stream send frame for the treatment of and forward.CPE also referred to as Optical Network Terminal (ONT) or optical network unit (ONU) serves as the gateway between ISP's network and family or small business network conventionally.
The downstream frame transmitting on PON generally includes some predefine fields, and comprise packet (customer flow) and various control structure, these control structures are for managing in being connected between OLT and CPE, and upstream transmission time division multiplexing (TDM) mechanism of using for the cpe device of coordinating on the other end of this network.In the upstream direction, estimate that PON cpe device transmits upstream frames when being asked by OLT.Upstream frames can comprise packet (customer flow) report.When making great efforts to be maintained in the PON synchronous protocol between OLT and ONU/ONT and being communicated with, even will be at the inactive time durations that either direction (downstream or upstream) is upper while sending at no user flow, OLT conventionally still periodically transmits operation and management (OAM) message and distributes for the upstream bandwidth of cpe device to cpe device.In response to OAM message, cpe device is arranged to acknowledge, state or report message as correlation standard.Generally speaking, estimate that cpe device is when no user flow or OAM will send to OLT, each upstream bandwidth of assigning to its at OLT completes transmission between allotment period, CPE by as the PON agreement of being correlated with stipulate in response to distributing to generate corresponding to upstream bandwidth and transmitting idle frame and/or message.
Present above description and as the General Introduction of this area relevant technologies, should not be construed as any information structure of admitting in information that it comprises with respect to the prior art of present patent application.
Summary of the invention
Be provided for the system and method for the customer premises equipment, CPE (CPE) on EPON (PON).A kind of system at least has the packet handler of active mode and sleep pattern, packet handler is arranged to be processed the data packet flows receiving from optical line terminal (OLT) by PON in datum plane and by PON, towards OLT transmission, divides into groups datum plane when in active mode, and when not receiving packet in described datum plane, enters sleep pattern.A kind of system also comprises the microcontroller separated with packet handler, microcontroller is arranged to from OLT and is received in operation and management (OAM) message and the upstream bandwidth distribution of transmitting control plane, and process OMA message and upstream bandwidth is distributed by following operation: to central local side acknowledge optionally, or wake-up packet processor to receive packet in datum plane in the situation that not waking described packet handler up.
As another example, in a kind of method of communicating by letter with optical line terminal (OLT) by EPON (PON), at PON customer premises equipment, CPE (CPE) equipment place, receive packet, and the packet receiving in the packet processor processes of PON cpe device.Home network interface place at CPE receives customer flow and towards OLT, sends customer flow by PON interface.Packet handler is being placed in to sleep pattern when at least two interfaces of threshold time Duan Weicong receive packet.From OLT, receive operation and management (OAM) message, and in the situation that described sleep pattern is waken described packet handler up, do not using micro controller module according to related protocol, to OLT, to transmit one or more confirmation, state or report message in response to OAM message, micro controller module is the module from packet handler separation.At PON cpe device place, receive packet or import the indication of packet into, and use microcontroller with in response to the reception of packet or indication and from sleep pattern wake-up packet processor.
Accompanying drawing explanation
Fig. 1 describes by PON, to be coupled to the block diagram of the CPE of OLT in an embodiment of disclosure.
Fig. 2 is the block diagram of describing PON CPE, and this PON CPE is arranged to the power mode of management packet handler and one or more ancillary equipment.
Fig. 3 is the sequential chart of describing the example communication of the microcontroller in an embodiment of disclosure.
Fig. 4 is the sequential chart that is depicted in the parts of the PON CPE that enters sleep and low-power mode during the inactive period of data packet transfer.
Fig. 5 is the schematic diagram of describing some parts of the PON CPE in an embodiment of disclosure.
Fig. 6 is the block diagram of describing to comprise the exemplary home network of PON cpe device.
Fig. 7 is the flow chart that passes through the method that PON communicates by letter with OLT of describing in an embodiment of disclosure.
Embodiment
Fig. 1 be describe in an embodiment of disclosure by PON108 be coupled to PON customer premises equipment, CPE (CPE) unit of optical line terminal (OLT) (not shown), such as the block diagram of home gateway 102.PON CPE102 comprises packet handler 104.Packet handler 104 is arranged to has active mode and sleep pattern.In active mode, packet handler 104 is arranged to the stream of processing the packet 106 receiving from OLT by PON108 in datum plane.In an embodiment of disclosure, packet handler 104 be arranged to by PON108 to OLT spread out of, namely upstream packet 1120 to be to contribute to the two-way communication between OLT and home network 112 via CPE102 by PON108.Packet handler 104 is arranged to and in datum plane, is not receiving or transmission of data packets enters sleep pattern at 106,110 o'clock.In an embodiment of disclosure, packet handler 104 significantly reduces power consumption with comparing in active mode in sleep pattern.
In one embodiment, CPE102 also comprises microcontroller 114, and this microcontroller is module or the integrated circuit from packet handler 104 separation.During the inactive period, though microcontroller 114 be arranged to receive OLT equipment 108 when the packet without receiving or transmitting still in control plane periodically the OAM message 116 of (for example every 10ms) transmission, as for example in the network of GPON compatibility for physical layer operations, administer and maintain (PLOAM) message.In compatible other standard, PON network such as EPON, receive other suitable OAM message, such as Multi-point Control Protocol (MPCP) message.By OLT, send OAM message 116 to be maintained in synchronizeing and being communicated with between PON CPE102 and OLT108.In one embodiment, when wake-up packet processor 104 not, microcontroller 114 is arranged to and according to related protocol 116, by the OAM downstream message in response to each reception, to the OLT108 that is positioned at central local side, optionally transmits one or more confirmation, state or report message 118 and process OAM message.In one embodiment, microcontroller 114 is also arranged at PON CPE102 and receives when importing packet 106 into or importing the indication of packet 106 into via wake-up signal 120 wake-up packet processors 104.
In an embodiment of disclosure, microcontroller 114 is arranged to the power level operation significantly lower than packet handler 104.During the inactive period, microcontroller 114 is arranged to disposes simultaneous operation and packet handler 104 maintains low-power mode.In one embodiment, by periodically receive OAM message and transmission response message optionally according to related protocol, maintain with the active of EPON 108 and be connected.Therefore microcontroller 114 is disposed so synchronous and without from consuming the auxiliary of more high-power packet handler 104.By making packet handler 104 can enter the total power consumption that sleep pattern reduces PON CPE102.In addition, by using microcontroller 114 to be connected to maintain with the active of OLT108, by the flow that provides 120 pairs of wake-up signals to recover packet 106, make response and allow the active response speed that comparatively speaking conventional system losing efficacy during the inactive period of packet 106 improves CPE201 that is connected to.
In an embodiment of disclosure, CPE102 be arranged to meet 1 watt of standby decree, such as U.S.'s administrative decree 13221, this rules and regulations federal agent selects to have the equipment that low standby energy consumes (for example no more than 1 watt) when buying some networking products.In another embodiment of disclosure, PON CPE102 be arranged to meet 0.5 watt of standby decree, such as the committee of European Parliament regulations 1275/2008.Other area, country, company and consumer pursue such energy efficient specification requirement similarly.
Except packet handler is placed in to low-power or sleep pattern to save power, in an embodiment of disclosure, CPE102 is also arranged to the power consumption that reduces other ancillary equipment, these ancillary equipment are arranged to and contribute to data from ISP's network to home network device, such as the communication of oolhiu interactive user equipment, and these oolhiu interactive user equipment comprise desktop computer, laptop computer, board equipment, smart phone or TV at an embodiment of disclosure.Fig. 2 be describe to be arranged to the CPE202 of the power mode of management packet handler and one or more ancillary equipment, as for example block diagram of home gateway SOC (system on a chip).Enforcement CPE202 is SOC (system on a chip), this SOC (system on a chip) comprises the packet handler 204 with active mode and sleep pattern, this packet handler be arranged in active mode process by EPON 208 from/go to the stream of the packet 206 of OLT, and do not receiving or entering during transmission of data packets sleep pattern.CPE202 also comprises and is arranged to a plurality of ancillary equipment that contributes to the communication of data from OLT to one or more home network device 210.In an embodiment of disclosure, CPE SOC (system on a chip) 202 comprises: memory, such as dynamic random access memory memory (DRAM) 212, packet handler 204 when the stream of process data packets 206 and this memory mutual; The inner exchanging machine 214 of route data between packet handler 204 and one or more home network device 210; And one or more input-output apparatus 216 that is arranged to the interface serving as between PON CPE202 and one or more home network device 210.
CPE SOC (system on a chip) 202 also comprises from the microcontroller 218 of packet handler 204 separation, and this microcontroller is arranged to during the inactive period of transmission of packet 206 from OLT208 and receives OAM message 220 (for example GPON PLOAM message or meet other suitable OAM message of different PON agreements or standard).During so inactive period, microcontroller 218 transmits back one or more confirmation, state or report message 222 to maintain synchronizeing and being communicated with and auxiliary without from packet handler 204 between PONCPE202 and OLT208 according to related protocol 208 to OLT in one embodiment.By doing like this, packet handler 204 can enter low-power or sleep state during the inactive period in the transmission of packet 206.
In an embodiment of disclosure, during the inactive period of transmission of packet 206, PON CPE202 is also placed in low-power or sleep pattern by one or more ancillary equipment in ancillary equipment 212,214,216 except packet handler 204.For example at packet handler 204 or microcontroller 218, sense while not yet receiving packet 206 from OLT208 for the predetermined threshold time period, order ancillary equipment 212,214,216 enters sleep state (for example instruction memory 212 enters self-refresh mode and command switch 214 and I/O equipment 216 and enters sleep state).When in sleep pattern, microcontroller 218 be arranged to dispose safeguard synchronize with OLT, thus when receiving packet 206 or import the indication of packet into or divide into groups to realize fast quick-recovery (for example, in 10ms) via wake-up signal 224 at 226 o'clock at home network device 210 request transmission outgoi8ng datas and communicate by letter.
Fig. 3 is the sequential chart of describing the example communication of the microcontroller in an embodiment of disclosure.Although describe sequential chart in the context of PLOAM message that meets GPON standard, corresponding other the suitable PON standard of attention figure is similar.During the inactive period of data packet transfer, network, for example OLT transmit OAM message to maintain timing synchronization to CPE.Such OAM message for example, is represented by periodicity (every 10ms) the PLOAM message 302 receiving from PON in CPE Optical Network Terminal in Fig. 3.In response to each the OAM message in OAM message 302, microcontroller is arranged to according to one or more confirmation for related protocol, state or report message 304 and answers.At home network, receive and to import packet 306 or packet into when importing very soon such indication into, microcontroller is to packet handler transmission wake-up signal 308, and this wake-up signal command packet processor exits sleep pattern and processes the to be received packet 306 of importing into.
Fig. 4 is the sequential chart that enters the parts of sleep and the PON CPE of low-power mode during the inactive period of data packet transfer.During very first time section, at PON CPE, from OLT, receive packet 402.404, data packet transfer stops, and soon subsequently, OLT only sends OAM message 406 to PON CPE.Once threshold time section 408 since last time data packet transfer in 404 end, play passage, PON CPE determines that some parts enters the time of sleep pattern just.In an embodiment of disclosure, packet transaction management enters sleep pattern.For example, when sleep threshold 408 expires, packet handler sends sleep commands 410,412 to I/O equipment and inner exchanging machine respectively.Packet handler also sends the order 414 for entering self-refresh mode to internal storage.Once packet handler has sent for ancillary equipment being placed in to the order of sleep/low-power mode, packet handler is converted to sleep pattern 418 from active mode 416.In other embodiment of disclosure, microcontroller sends for making the order of some ancillary equipment power down.
Fig. 5 is the schematic diagram of describing some parts of the PON CPE in an embodiment of disclosure.PON CPE comprises and is arranged to the packet handler CPU502 that processes the data packet flows receiving from network.PON CPE also comprises a plurality of subsystem ancillary equipment 504, and these system peripherals equipment are arranged to the communication that contributes to the subscriber equipment of data from network to the internal network associated with PON CPE.From the microcontroller 506 of host packet processor CPU502 separation be arranged to dispose automatic network (for example optical line terminal) OAM message and without from host packet processor CPU502 or any other universal access memory, auxiliary such as DRAM.Microcontroller 506 is in response to one or more closely-coupled memory 508,510 in an embodiment of disclosure, and these memories comprise for disposing the instruction and data of the OAM message of automatic network.In an embodiment of disclosure, the closely-coupled memory 508 of instruction comprises the instruction set for being utilized when disposing OAM message and wake-up packet processor CPU502 by microcontroller 506.The closely-coupled memory 510 of data comprises the data for being used when carrying out those functions by microcontroller 506.In an embodiment of disclosure, during initialization procedure, the closely-coupled memory 508 of application instruction data stuffing instruction for packet handler CPU502, the use of the software/firmware of 506 pairs of renewals of this application instruction Data support microcontroller.In an embodiment of disclosure, closely-coupled memory the 508, the 510th, quick on-chip memory, these quick on-chip memories are walked around the high-speed cache associated with microcontroller 506 and the low delay of the level that provides safeguard.Therefore, so closely-coupled memory 508,510 provides the low delay memory access that is exclusively used in microcontroller 506, and this is avoided the unpredictability existing in some cache memories.
In an embodiment of disclosure, the CPE of Fig. 5 is manufactured to SOC (system on a chip).SOC (system on a chip) comprises substrate, and wherein packet handler CPU502 is arranged on substrate.Microcontroller 506 is also connected to substrate and is electrically connected to packet handler CPU502 via substrate as separation module.SOC (system on a chip) is also included in one or more additional peripheral devices of making on substrate, and this one or more additional peripheral devices is arranged to and contributes to the communication of data from network to subscriber equipment.In an embodiment of disclosure, those ancillary equipment comprise memory, input-output apparatus and inner exchanging machine.
Fig. 6 is the block diagram of describing to comprise the exemplary home network of cpe device 602.Cpe device 602 comprises packet handler CPU604 and for dispose the microcontroller 606 synchronize with external network during the inactive period of data packet transfer.PON cpe device 602 and some memory, such as flash memory 608 and DDR memory 610 mutual.Cpe device 602 also comprises for via one or more WiFi network 618, for example, such as or multinomial mutual I/O interface of 802.11n network and USB hard disk 612, eSATA hard disk 614 and certain user's interactive device 616 (TV, computer, laptop computer, smart phone).PON cpe device 602 also comprises for the interface that is independent of gigabit medium 624 via simplifying with other network, such as the mutual interface of local area network (LAN) 620, wide area network 622 and mediator network.
In an embodiment of disclosure, the microcontroller 606 of PON cpe device 602 is arranged to during the inactive period of packet transaction packet handler CPU604 and some ancillary equipment is placed in to sleep or standby mode.When packet handler CPU604 is in sleep state, microcontroller 606 is disposed OAM message and wake-up packet processor CPU604 not.Except packet handler CPU604 is placed in sleep state, microcontroller 606, in an embodiment of disclosure, is also placed in the mutual I/O interface of the external component for home network low power state, such as the USB interface for mutual with the outside hard disk 612 of USB, for the eSATA interface mutual with the outside hard disk 614 of eSATA and for the I/O interface mutual with the subscriber equipment 616 being connected with WiFi network 618.
In an embodiment of disclosure, microcontroller 606 is arranged to and serves as not only for packet transaction CPU604 but also for the agency of other peripheral hardware that can receive OAM message of system.When a plurality of ancillary equipment is in low-power mode and when receiving the OAM message of the request confirmation associated with certain peripherals, the agency that microcontroller 606 is arranged to by serving as for certain peripherals for certain peripherals acknowledge does not wake certain peripherals up from low-power mode.For example for example, when the OAM message of the memory (flash memory 608 or DDR memory 610) in low-power or self-refresh mode is guided in reception into, microcontroller sends confirmation signal and from the low-power mode of memory 608,610, does not wake them up, wherein formats acknowledge message to be revealed as from interested peripheral hardware.
Fig. 7 is the flow chart of describing the method for communicating by letter with OLT in an embodiment of disclosure.702, at PON cpe device, receive packet.704, the packet receiving in the packet processor processes of gateway device.706, when for the grouping of threshold time section not received data at least, packet handler is placed in to sleep pattern.708, at PON cpe device, from OLT, receive OAM message, and 710, use micro controller module in response to OAM message, to OLT, to transmit one or more confirmation, state or report message and not from sleep pattern wake-up packet processor, this micro controller module is the module from packet handler separation according to related protocol.712, at PON cpe device, receive packet or import the indication of packet into, and 714, use microcontroller with in response to receiving packet or indication from sleep pattern wake-up packet processor.
The application's usage example illustrates the present invention.Patentable scope of the present invention comprises other example.For example, in an embodiment of disclosure, PON CPE is arranged to common old-fashioned telephone service (POTS) and docks.In such embodiments, PON CPE serves as the interface with POTS network---and be that telephone plant is connected to PON CPE, wherein PONCPE serves as public switched telephone network (PSTN) gateway or VoIP (ip voice) gateway.This PSTN gateway converts phone traffic to IP for passing through data network transmission.In such embodiments, estimate that microcontroller is arranging packet handler and wake-up packet processor when " off-hook " from telephone plant indicates during the period without transmission.
Claims (22)
1. the customer premises equipment, CPE (CPE) on EPON (PON), comprising:
The packet handler at least with active mode and sleep pattern, described packet handler is arranged to be processed the data packet flows receiving from optical line terminal (OLT) by described PON in datum plane and by described PON, towards described OLT transmission, divides into groups datum plane when in active mode, and when not receiving packet in described datum plane, enters described sleep pattern;
The microcontroller separated with described packet handler, is arranged to from OLT and is received in operation and management (OAM) message of transmitting control plane, and process described OAM message by following operation:
In the situation that not waking described packet handler up to central local side acknowledge message optionally, or
Wake described packet handler up to receive packet in described datum plane.
2. PON CPE according to claim 1, wherein said microcontroller is arranged to during the period of not receiving packet from described central office termination and periodically receives described OAM message from described central local side.
3. PON CPE according to claim 2, is wherein GPON physical layer operations and maintains (PLOAM) message from the described OAM message of described central office termination receipts.
4. PON CPE according to claim 2, is wherein EPON Multi-point Control Protocol (MPCP) message from the described OAM message of described central office termination receipts.
5. PON CPE according to claim 2, wherein said microcontroller is arranged to and utilizes described OAM message and one or more confirmation, state or report message to maintain synchronizeing and being communicated with between described CPE and described OLT according to related protocol.
6. PON CPE according to claim 1, also comprises and is arranged to a plurality of ancillary equipment that contribute to the communication of data from described OLT to subscriber equipment, and wherein said packet handler is arranged to a plurality of ancillary equipment described in order and enters low-power mode.
7. PON CPE according to claim 1, also comprises and is arranged to a plurality of ancillary equipment that contribute to the communication of data from described OLT to subscriber equipment, and wherein said microcontroller is arranged to a plurality of ancillary equipment described in order and enters low-power mode.
8. PON CPE according to claim 1, also comprise and be arranged to a plurality of ancillary equipment that contribute to the communication of data from described OLT to subscriber equipment, wherein at described a plurality of ancillary equipment during in low-power mode and during the OAM message of the confirmation being associated with certain peripherals in the request that receives, described microcontroller is arranged in the situation that not waking described certain peripherals up from described low-power mode and for the confirmation of described certain peripherals, serves as the agency for described certain peripherals by transmitting.
9. PON CPE according to claim 1, wherein said microcontroller responds one or more closely-coupled memory, and described one or more closely-coupled memory comprises for disposing the instruction and data from the OAM message of described OLT.
10. PON CPE according to claim 1, wherein said microcontroller responds to the closely-coupled memory of instruction set with to the closely-coupled memory of data, the closely-coupled memory of wherein said instruction set is arranged to during initialization procedure from described packet handler and receives application instruction data, and wherein said microcontroller is arranged in the described acknowledge message of transmission with in waking the process of described packet handler up and uses described application instruction data.
11. 1 kinds of methods of communicating by letter with optical line terminal (OLT) by EPON (PON), comprising:
At PON customer premises equipment, CPE (CPE) equipment receiving data, divide into groups;
At the packet handler of described PON cpe device, manage the described packet of reception everywhere;
Described packet handler is being placed in to sleep pattern when at least threshold time Duan Wei receives packet;
At described PON cpe device place, from described OLT, receiving operation and management (OAM) message or upstream bandwidth distributes;
In the situation that described sleep pattern is waken described packet handler up, do not using micro controller module according to related protocol, to described OLT, to transmit one or more confirmation, state or report message in response to described OAM message, described micro controller module is the module separated with described packet handler;
At described PON cpe device place, receive packet or import the indication of packet into;
Use described microcontroller with in response to the described reception of described packet or indication is waken up to described packet handler from described sleep pattern.
12. methods according to claim 11, also comprise:
Do not receive packet period period receive additional OAM message, and according to additional one or more confirmation, state or the report message of requirement transmission of described related protocol.
13. methods according to claim 11, wherein said acknowledge message is included in described microcontroller and manages the GPON OAM message that adopts physical layer operations and maintain (PLOAM) form of message everywhere.
14. methods according to claim 11, wherein said acknowledge message is included in described microcontroller and manages the EPON OAM message that adopts Multi-point Control Protocol (MPCP) form of message everywhere.
15. methods according to claim 11, also comprise:
According to described related protocol, with described OAM message and described confirmation, state or report message, maintain synchronizeing and being communicated with between described PON CPE and described OLT.
16. methods according to claim 11, also comprise:
Use described packet handler to be arranged to and to contribute to data by described PON, to a plurality of ancillary equipment of the communication of subscriber equipment, to enter low-power mode from described ISP's network with order before entering described sleep pattern at described packet handler.
17. methods according to claim 11, also comprise:
Use described microcontroller to be arranged to and to contribute to data by described PON, to a plurality of ancillary equipment of the communication of subscriber equipment, to enter low-power mode from described ISP's network with order before entering described sleep pattern at described packet handler.
18. methods according to claim 11, also comprise:
By being arranged to, contribute to data by described PON, to a plurality of ancillary equipment of the communication of subscriber equipment, to be placed in low-power mode from described ISP;
Receive specific OAM message, described specific OAM message is sought the confirmation from the certain peripherals in described ancillary equipment;
The confirmation to described specific OAM message from described microcontroller transmission in the situation that not waking described certain peripherals up from described low-power mode, wherein said microcontroller serves as the agency for described certain peripherals in transmitting the process of the described confirmation of described specific OAM message.
19. methods according to claim 11, also comprise:
Use described microcontroller to access the instruction and data from one or more closely-coupled memory, for transmitting one or more confirmation, state or report message according to described related protocol to described OLT.
20. methods according to claim 11, also comprise:
In the situation that not waking described packet handler up from described sleep pattern with described microcontroller to distribute to generate and transmit idle frame and/or message in described corresponding upstream bandwidth according to the prescribed response of described relevant PON agreement when no user flow will send to described OLT.
21. methods according to claim 19, also comprise:
Microcontroller described in initialization, wherein described in initialization, microcontroller comprises using from the director data of described packet handler and fills one of described one or more closely-coupled memory.
22. methods according to claim 11, also comprise:
With micro controller module, in the situation that not waking described packet handler up from described sleep pattern, in response to the described corresponding upstream bandwidth receiving from described OLT, distribute, according to described relevant PON agreement, come to described OLT transmission idle frame and/or message, described micro controller module is the module separated with described packet handler.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
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| US201261713876P | 2012-10-15 | 2012-10-15 | |
| US61/713,876 | 2012-10-15 | ||
| US14/028,796 US9344215B2 (en) | 2012-10-15 | 2013-09-17 | Systems and methods for advanced power management for optical network terminal systems on chip |
| US14/028,796 | 2013-09-17 |
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| CN103731762A true CN103731762A (en) | 2014-04-16 |
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