CN101873518A - Energy saving method of ONU (Optical Network Unit) in XG-PON (10 Gigabit-Capable Passive Optical Network) system or GPON (Gigabit-Capable Passive Optical Network) system - Google Patents

Abstract

The invention relates to an energy saving method of ONU in an XG-PON system or a GPON system. In set time, the PON link of the ONU does not receive down customer data, and no up customer data is sent, the ONU enters deep sleep while sending a DG (dying gasp) message to tell the OLT (Optical Line Terminal) system at the opposite end; the ONU is alternately switched between an inactive state and a semi-active state after entering the deep sleep, and the length of the activity time of the ONU in the semiactive state is changeable; the ONU enters a full-active state when quitting the deep sleep. When the ONU is in the semi-active state, a receiving function works only, and the data is not sent. The energy saving method of the ONU in the XG-PON system or the GPON system is a method of the ONU deep sleep; on the premise of ensuring the service level of user service, the energy consumption of the ONU is reduced and the bandwidth use ratio is improved; under the conditions of FTTH (Fiber To The Home) scenes and high shunt ratio, the method especially has important meaning.

Description

The power-economizing method of ONU in a kind of XG-PON system or the GPON system

Technical field

The present invention relates to the energy consumption control technology field of ONU in user's Fiber Access System of public's telecommunications service, is the power-economizing method of ONU in a kind of XG-PON system or the GPON system specifically.XG-PON is the multi-plexing light accessing system of the EPON of use ten thousand megabit abilities, and GPON is the passive optical network of gigabit ability.

Background technology

Each Chinese and English technical term implication is as follows among the present invention:

	Technical term	Implication
				1.	10G EPON	10G bits per second Ethernet passive optical network
2.	AB	AB-authorizes time slot data stream of pulsess (allocated burst)
			3.	Alloc-ID	Distribute to the Logic Channel Identifier of ONU
4.	Cycle	Cycle
			5.	DCC	The control client of DRX
6.	DG	Sound sleep is felt and the indication (Dying gasp indication) of panting to be contained the sleep reason
			7.	DRT	Discontinuous transmitting-receiving
8.	DRX	Discontinuous reception
			9.	Cycle	By be in semi-active state during and be in inactive state during form.
10.	The DRX ring	The figure that condition line constituted during sound sleep was felt.Rising edge is certain periodicity on time.Form by a plurality of cycles.
			11.	Drx-InactivityTimer	Also do by " Inactivity timer ", refer to non-active timer, if this timer expiry, the inactive state that then enters ring.
12.	FTTH	Fiber to the home
			13.	GTC	The Transmission Convergence of G-PON

	Technical term	Implication
			??14.	??OAM	OAM refers to the message at the operation management maintain that transmission convergence layer transmitted of PON
??15.	??OLT	Optical line terminal
			??16.	??OMCI	ONU manages control interface
??17.	??ONU	Optical network unit
			??18.	??PLOAM	The message of physical layer operations management maintenance
??19.	??PON	Passive optical network
			??20.	??RAB	Insert stream of pulses at random
??21.	??RAC	Random Access Channel
			??22.	??TC	Transmission Convergence
??23.	??XGEM	10G speed GPON generic encapsulation pattern
			??24.	??XGTC	The Transmission Convergence of XG-PON

For the actual user demand of satisfying constantly development, changing, the GPON/XG-PON system must be optimized on ins and outs, makes to surmount to some extent on the systematic function.XG-PON speed ratio 10G EPON is low; Adopt TC encapsulation and XGEM encapsulation that the high shortcoming of expense is arranged again, needing increases some excellent characteristic, to remedy the deficiency on the throughput.If in technical system, more consideration economy and performance, Fiber to the home uses for more considerations support, then might make the XG-PON system have better energy-conserving and environment-protective characteristic, has stronger competitiveness.

The user terminal system that is access in network along with power save mode uses in a large number, the conservation measures of the user side ONU of existing GPON/XG-PON system mostly is periodic sleep greatly, described periodic sleep is meant: when ONU finds not have up customer data (or data flow) and descending customer data (or data flow), just start a timer, after opposite end OLT sends DG message, go forward side by side into the sleep state; When this timer expiry, just withdraw from sleep state and enter active state, be in the ONU of active state, its reception and the function that sends the up-downgoing customer data keep activating always, even do not have under the situation that customer data need receive and dispatch.Described descending finger OLT is to the transmission direction of ONU, and up finger ONU is to the transmission direction of OLT.This kind power save mode is not enough to finish the energy-conservation of ONU higher level, and the non-essential activity of ONU is still higher.Mainly there is following shortcoming:

1) periodic sleep does not realize that ONU makes ONU be in half activity in sleep, and promptly ONU does not send data, and only receiving function is in work.

2) do not have under the situation that data will send, ONU contact opposite end OLT system is too frequent, and it is more and disperse to take ascending time slot.

Summary of the invention

At the defective that exists in the prior art, the object of the present invention is to provide the power-economizing method of ONU in a kind of XG-PON system or the GPON system, under the prerequisite of the service level that does not influence customer service, fully find out and reduce the unnecessary activity of ONU, make it the energy that uses reduce, realize the energy-conservation ability of efficient ONU.

For reaching above purpose, the technical scheme that the present invention takes is:

The power-economizing method of ONU is characterized in that in a kind of XG-PON system or the GPON system, may further comprise the steps:

1) in the stipulated time, the PON link of ONU is not received descending customer data, and does not have up customer data to send, and ONU promptly when sending DG message and telling opposite end OLT system, enters deep sleep;

2) enter the ONU of deep sleep, except regular contact OLT, according between inactive state and semi-active state, switching that some cycles replaces,

ONU be in semi-active state during, receive the PLOAM message of downlink frame and possible descending customer data;

ONU be in semi-active state during do not send data to OLT end, sending function is closed;

ONU be in inactive state during, do not receive data, PON link receiving function is closed;

ONU be in inactive state during do not send data to OLT end, sending function is closed;

3) ONU be in semi-active state during, ONU judges according to the paging Paging message of whether receiving down physical layer PLOAM type whether ONU withdraws from from deep sleep, enters normal communication state;

4) ONU be in semi-active state during, have customer data to send needs when ONU judges this ONU up direction, then start calling procedure, to the OLT transmission message of waking up, and ONU withdraws from from deep sleep, enters normal communication state on Random Access Channel;

The ONU that is in calling procedure uses the mandate time slot of the Random Access Channel of OLT distribution, and the mandate time slot of this Random Access Channel is the public uplink random access channel mandate time slot of OLT distribution.

On the basis of technique scheme,, needed the ONU competition of calling procedure to use arbitrarily at the public uplink random access channel mandate time slot of OLT distribution.

On the basis of technique scheme, the described cycle of switching between inactive state and semi-active state that replaces is to determine according to a state timer,

When ONU received PLOAM message or downlink data, this state timer of just resetting, this state timer restarted timing to prolong the time that ONU is in semi-active state; When ONU when not receiving PLOAM message or downlink data, this state timer of not resetting;

When this state timer expiry stopped, ONU entered inactive state from semi-active state.

The power-economizing method of ONU in XG-PON system of the present invention or the GPON system is a kind of method of ONU deep sleep, under the prerequisite of the service level that guarantees customer service, has reduced the ONU energy consumption, has improved bandwidth availability ratio; The FTTH scene and big along separate routes than condition under, this way is especially significant.

Description of drawings

The present invention has following accompanying drawing:

The parameter of Fig. 1 ONU deep sleep,

Fig. 2 deep sleep and OLT's is for example mutual,

The example explanation of Fig. 3 Fig. 2,

Fig. 4 RAC window,

The flow process of Fig. 5 ONU,

The flow process of certain ONU correspondence portion among Fig. 6 OLT.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

Key of the present invention is the necessary activity of only introducing in sleep, reduces non-essential activity, reduces power loss when guaranteeing real-time service performance.For realizing this technical goal, the present invention has stipulated the deep sleep of ONU, and the deep sleep of so-called ONU is meant: ONU has following three kinds of states: the full active state (normal communication state) after entering inactive state (also can be described as inactive state) behind the deep sleep, enter the semi-active state (also can be described as semi-active state) behind the deep sleep and withdrawing from deep sleep.

When 1, ONU was in semi-active state, only receiving function was being worked, is not being sent data, that is: ONU does not send the customer data of up direction, and having only descending reception is activated state.

When 2, ONU is in full active state, just send the customer data of up direction, and descending reception is an activated state.

When 3, ONU was in inactive state, ONU did not send the customer data of up direction, and descending reception is non-activated state.

4, after ONU entered deep sleep, what replace switched between inactive state and semi-active state, and ONU is in the activity time variable-length in the semi-active state.

5, ONU enters full active state when leaving the deep sleep conditions being possessed.

The ONU of deep sleep of the present invention its when being in and receive (semi-active state), the time and stop to receive the state of (inactive state), be in the state of discontinuous reception (DRX) in other words, therefore for the ONU of deep sleep, OLT need not distribute dedicated bandwidth to give this ONU, has improved the upstream bandwidth efficient of system.

The main points of the technical scheme that the present invention provides comprise:

1) in the stipulated time, the PON link of ONU is not received descending customer data, and does not have up customer data to send, and ONU promptly when sending DG message and telling opposite end OLT system, enters deep sleep; That is: ONU informs that by sending DG message to opposite end OLT system OLT system this ONU in opposite end enters deep sleep;

2) enter the ONU of deep sleep, except regular contact OLT,, receive the PLOAM message of downlink frame and possible descending customer data in the mode of DRX (discontinuous reception) according between inactive state and semi-active state, switching that some cycles replaces; That is: ONU be in semi-active state during, receive the PLOAM message of downlink frame and possible descending customer data; ONU be in inactive state during (remove that time of semi-active state in the DRX ring, this moment, condition line was a low level, and ONU is in inactive state), do not receive data, PON link receiving function is closed.And ONU is according to the frequency (specifically referring to following the 8th) that receives PLOAM message and descending customer data, be controlled at a semi-active state in the DRX ring during; Described DRX ring by ONU be in semi-active state during and ONU be in inactive state during constitute,

3) enter the ONU of deep sleep, ONU be in semi-active state during do not send data to opposite end (OLT end), sending function is closed; ONU be in inactive state during do not send data to OLT end, sending function is closed.

4) ONU be in semi-active state during, ONU judges that according to the particular message (paging Paging message) of whether receiving the PLOAM type of down physical layer ONU withdraws from (waking up) from deep sleep, enters normal communication state.That is: when ONU be in semi-active state during, and received the paging Paging message of the PLOAM type of down physical layer, then ONU withdraws from from deep sleep, enters normal communication state.

5) ONU be in semi-active state during, there is customer data to send needs when ONU judges this ONU up direction (mailing to the OLT direction), then starts calling procedure, go up to OLT in Random Access Channel (RAC) and send the message of waking up, and ONU withdraws from from deep sleep, enters normal communication state.

6) ONU that is in calling procedure uses the mandate time slot of the Random Access Channel of OLT distribution, and the mandate time slot of this Random Access Channel is the public uplink random access channel mandate time slot of OLT distribution.

7) authorize time slot at the public uplink random access channel (window) of OLT distribution, needed the ONU competition of calling procedure to use arbitrarily.

8) one-period of DRX ring by ONU be in semi-active state during and ONU be in inactive state during forms, the described cycle of switching between inactive state and semi-active state that replaces is definite according to a state timer (hereinafter being called the Inactivity timer); Be in the time of semi-active state, stop according to the overtime of state timer, this state timer is whenever received PLOAM message or the downlink data timer of just resetting.That is: the described cycle of switching between inactive state and semi-active state that replaces is to determine according to a state timer,

When ONU received PLOAM message or downlink data, with regard to the Reset Status timer, the state timer restarted timing to prolong the time that ONU is in semi-active state; When ONU when not receiving PLOAM message or downlink data, Reset Status timer not;

When this state timer expiry stopped, ONU entered inactive state from semi-active state.

For example: establishing state timer initial value is 100ms, when the state timer successively decreases timing when the 40ms, PLOAM message or downlink data have been received, then the Reset Status timer is initial value (100ms), then the state timer begins the timing of successively decreasing from 100ms again, has then prolonged the time that ONU is in semi-active state;

When ONU when not receiving PLOAM message or downlink data, the timing of successively decreasing of Reset Status timer not, state timer, when this state timer expiry stopped, ONU entered inactive state from semi-active state.

Fig. 1 has provided the parameter of ONU deep sleep, among Fig. 1,

On Duration is the fundamental surveillance duration,

Opportunity for DRX is the chance of DRX,

During ONU sleep duration is the ONU deep sleep.

Under the ONU deep sleep situation, its active characteristics or condition line are illustrated by characteristic parameter.

As shown in Figure 1, the high level of condition line is represented the receiving function work of ONU, and low level represents that the receiving function of ONU closes.As shown in Figure 1, under ONU deep sleep situation, form by several discontinuous reception (DRX) rings.Be that ONU is in half activity (reception) state between the high period of condition line among the figure, low level is the ONU inactive state.By following 4 situations of change that parameter has specifically been portrayed condition line, concrete parameter is defined as follows:

DRX Cycle: the On Duration that the cycle that indicates repeats follows possible inactive time at interval at interval behind the On Duration.See Fig. 1.

OnDurationTimer: this timer valid period, the descending reception work of ONU.

Drx-InactivityTimer: promptly aforesaid state timer, indicate the last time successfully decode PLOAM message or receive descending customer data after, wait for the interval decode success once more or receive descending customer data.PLOAM is the message of the operation management maintain that physical layer transmitted.

DrxStartOffset: indicate the moment that DRX begins.

If ONU be in semi-active state during do not have its PLOAM message of decoding of success or receive descending customer data, timer drx-InactivityTimer is with overtime, then enter into Inactivity state (ONU enter inactive state during) according to DRX operation, ONU closes receiving function; If ONU be in semi-active state during successful its PLOAM message of decoding or receive descending customer data, timer drx-InactivityTimer will restart (Reset Status timer), ONU then keeps semi-active state.

Fig. 2 has provided a deep sleep and the mutual of OLT given an example, and the example explanation of Fig. 2 is referring to Fig. 3.

ONU is when moment O timer B ultrasonic (not having up downlink data), and the time slot of going thereon sends DG message immediately.

In the moment 1, DG message is received by this ONU correspondence portion of OLT.

In the moment 2, ONU according to meeting drxStartOffset skew requirement, enters deep sleep after timer RTT is overtime.The RTT timer is a fixed value, is generally the sizes values of ranging window.

In the moment 3, ONU has received PLOAM message, and drx-InactivityTimer has reset.

In the moment 4, the drx-InactivityTimer timer expires.Enter the rest period of deep sleep.

In the moment 5, OLT sends paging Paging message because there are data to send.

In the moment 6, ONU has left deep sleep.

Its ONU active characteristics or condition line are illustrated by characteristic parameter among Fig. 2.The receiving function work of the high level of condition line (1) expression ONU, the receiving function of low level (0) expression ONU is closed.Under ONU deep sleep situation, there are several discontinuous reception (DRX) rings to form as figure.Be that ONU is in half activity (reception) state between the high period of condition line among Fig. 2, low level is the ONU inactive state.

Fig. 4 is Random Access Channel (window), among Fig. 4:

Random Access Channel: Random Access Channel,

Random Access Burst: insert stream of pulses at random,

XGTC Superframe counter:XGTC superframe counting,

Upstream overhead bytes (PSBu): up overhead byte,

Payload: net load,

Frame 2: frame 2,

Random delay: random delay,

Random Access Burst (RAB): insert stream of pulses at random

AB: authorize time slot data stream of pulsess (allocated burst)

ONUx:ONU ID is the RAB of x, x=x, y, z

ONUa:ONU ID is the AB of a, x=a, b, c

Fig. 4 the drawn uplink frame of XGTC (or GTC) and the situation of downlink frame.RAC (is assigned with the alloc-ID of RAC special use, i.e. alloc-ID=1021) in a section of uplink frame.

A common uplink frame, for example frame 2, are made up of a plurality of AB.Each AB is the mandate time slot (zero-time and length) that OLT gives some alloc-ID; Expression OLT in the position at ONUa place among the figure (i.e. this AB) is the mandate time slot that the alloc-ID=a logical channel is distributed, and ONUa pulse data stream comprises data (data that may the comprise OMCI) stream of pulses that the ONU of alloc-ID=a sends at this mandate time slot.

A uplink frame that contains RAC then has a window (RAC) and a plurality of AB to form.RAC comprises that a plurality of RAB form.RAB and AB have at least 3 different:

1. in a window (RAC), the mandate time slot that OLT sends is alloc-ID=1021, and those ONU in sleep may send RAB, and just RAB may collide (overlapping).But since ONU all random delay a period of time just begin the RAB that sends, so also there is the big probability that does not collide.And the alloc-ID of AB is often different, does not collide.

Be at random a period of time 2.ONU postponed length respectively.

3.RAB be regular length, and its time length is littler than AB.

RAB is made up of up overhead byte and payload.Its requirement is referring to 8 of B) joint.

The present invention uses deep sleep, and has advised Random Access Channel, sets up the high-speed traffic between ONU and the OLT.

A, deep sleep summary

Enter the ONU of deep sleep, regularly receive (the discontinuous reception of accurately saying so---DRX) downlink data, but do not send the up direction customer data, to save the energy.The control flow of DRX is used for controlling the active characteristics or the condition line of DRX ring, thus half activity time that the actual DRX of control encircles.For the ONU of deep sleep, OLT need not give this ONU by dynamic bandwidth allocation, to improve the bandwidth efficiency of XG-PON simultaneously.

The control flow of described DRX is " flow process of ONU " directly actuated flow process, and latter's " flow process of ONU " also communicates by letter with " flow process of OLT " and be interactive.

The actuation event that makes ONU leave deep sleep has only two kinds of situations: situation 1, and OLT desires to wake up ONU, and OLT sends paging Paging message in PLOAM message; Situation 2, ONU has detected up direction and has sent data flow.

Belong to situation 2, desire to leave the ONU of deep sleep, send the message of waking up in Random Access Channel, OLT begins to this ONU branch bandwidth time slot after receiving information, and sends the affirmation Paging message of waking up.Thereby guaranteed the timing requirement of real time business.

Enter the deep sleep criterion: successfully after the registration, ONU just can carry out the parameter configuration of deep sleep.The condition of deep sleep (actuation event) is: if do not have upstream and downstream in a period of time.

The control flow of B, deep sleep

The ONU of deep sleep uses each function of a plurality of DRX rings (several parameters of describing activity feature) control ONU deep sleep to open and close, and in needs, (during the semi-active state of deep sleep, detect), the uplink random access channel keep with OLT get in touch (RAC of Fig. 6 sends 1), the heartbeat message that transmitting system is required.

1) parameter declaration

Under the ONU deep sleep situation, its active characteristics or condition line are illustrated by characteristic parameter.The high level of condition line is represented the receiving function work of ONU, and low level represents that the receiving function of ONU closes.Under ONU deep sleep situation, there are several discontinuous reception (DRX) rings to form as figure.Be that ONU is in half activity (only receiving) state between the high period of condition line among the figure, low level is the ONU inactive state.4 parameter declarations have been arranged concrete situation of change of portraying condition line, the situation of promptly having portrayed a plurality of DRX rings.

Parameter is defined as follows:

DRX Cycle: the On Duration that the cycle that indicates repeats follows possible non-activity (inactive) time interval thereafter at interval.Referring to Fig. 1.

OnDurationTimer: indicate continuous XGTC frame number.The descending receiving function work of this section of ONU period.

Drx-InactivityTimer: indicate the last time successfully decode PLOAM message or receive descending customer data after, wait for the successful interval (XGTC frame number) of decoding once more.

DrxStartOffset: indicate XGTC frame number that DRX begins to K * N delivery value (divided by the remainder of K * N), N is the shunt ratio of XG-PON or GPON, and K is a natural number.

If ONU be in semi-active state during do not have the decoding of success to belong to its PLOAM message, will enter into the Inactivity state according to the DRX operation; If ONU be in semi-active state during successful decoding belong to its PLOAM message, restart drx-activityTimer, prolonged (active time length) during the semi-active state.

2) parameter configuration

OLT uses the parameter (being referred to as the DRX parameter again) of DRX control client (DCC is on PLOAM Message Processing subregion) configuration ONU deep sleep function, thus the action of control ONU deep sleep.When at registered state, if the deep sleep functional configuration of certain ONU, this ONU allows to monitor PLOAM message and receive customer data in the mode of deep sleep, otherwise just is non-deep sleep, i.e. the proper communication mode that receives and send continuously continuously.The moment a time period of Fig. 2, DCC has implemented deep sleep (DRX parameter) the operative configuration communication of ONU.

The DRX of OLT control client (DCC) finishes certain ONU and this ONU deep sleep configuration in the corresponding portion of OLT by disposing several timers.Concrete, DRX parameter (being the time-out time of several timers) comprising:

A) ONU side: onDurationTimer, drx-InactivityTimer (Inactive timer), DRX-Cycle (H2), drxStartOffset, timer B and

B) OLT side correspondence portion: DRX-Cycle (H1), onDurationTimer (D1)

3) ONU enters into DRX Cycle operation criterion

After success was registered, ONU just can enter deep sleep, and the condition of deep sleep is: if (during the timer B ultrasonic) do not have upstream and downstream in a period of time.

4) operation of DRX ring

When using the DRX operation, ONU receives PLOAM message and possible descending customer data according to the discontinuous flow process of DRX.

If ONU be in semi-active state during do not have its PLOAM message of decoding of success or receive descending customer data, timer drx-InactivityTimer is overtime, then enters into the Inactivity state according to the DRX operation, ONU closes receiving function; If ONU be in semi-active state during successful its PLOAM message of decoding or receive descending customer data, timer drx-InactivityTimer will restart, ONU then keeps semi-active state.

5) ONU leaves the deep sleep judgement

Dual mode is arranged:, paging Paging message is arranged in the downstream perhaps if there is upstream data to need to send.

6) ONU leaves deep sleep

ONU uses getting in touch fast of Random Access Channel and OLT, withdraws from deep sleep, enters normal working method (non-deep sleep);

OLT recovers to distribute bandwidth to give this ONU after receiving random message on the Random Access Channel;

7) the relevant communication of deep sleep

About the ONU flow process and the interaction of OLT flow process of deep sleep, mainly comprise paging (Paging) message of down direction, and the message of waking up of the Random Access Channel of up direction, three kinds of message are confirmed in heartbeat message and paging.

Beep-page message defines in PLOAM message, promptly defines new PLOAM message.The transmission condition of beep-page message is to have descending customer data to send, and perhaps receives and sends the beep-page message affirmation of representing to wake up after the message of waking up of ONU.

The main contents of beep-page message comprise 2 territory: ONU-ID (2 byte), function coding (code) (1 byte).Function coding is optional, be used to distinguish the type of beep-page message, differentiation is to belong to initiatively paging ONU of paging Paging:OLT, make it (the code=2 that revives, " send Paging message 2 " and " keeping sending Paging message " use at the OLT flow chart), still belonging to wakes up confirms Paging: active distal is left deep sleep (code=1 " sends Paging message 1 " at the OLT flow chart and uses), as the response of the message of waking up.This function coding helps the statistics of network management information.

Three kinds of message of Random Access Channel (message of waking up, heartbeat message and paging are confirmed) can be in range finding (registration) window, perhaps independent assigns authorized time slot, and the latter is Random Access Channel as shown in Figure 4.Should have lower collision probability in the Random Access Channel.The information content of the message of waking up and heartbeat message is simple, is the short pulse data flow.

8) Random Access Channel

Random Access Channel is the communication channel that ONU communicates by letter with OLT in deep sleep.ONU inserts stream of pulses (RAB) photos and sending messages to OLT at random by sending in Random Access Channel.

Insert stream of pulses (RAB) at random in the Random Access Channel original position, should make with the probability of other ONU collision lower in length delay at random for some time.And the message content that inserts stream of pulses at random should be simple, and is brief.

The use occasion of Random Access Channel:

1) when reviving, needs (are used for sending out the message of waking up),

2) regularly get in touch with OLT (jumping message is used for making up one's mind)

3) (being used for responding the paging Paging message of OLT) confirmed in paging

The information that inserts stream of pulses (RAB) at random is very simple, is made up of up overhead byte and payload, and payload is made up of ONU-ID (length is 2 bytes) and code (length is 1 byte).ONU has declared the ONU-ID of oneself like this, and at the code coding key be above-mentioned which kind of situation.For example code=1 represents it is above-mentioned situation 1) message of waking up.Code=2 represents it is above-mentioned situation 2) heartbeat message.Code=3 represents it is above-mentioned situation 3) the paging affirmation.Check for the complete of information, insert the byte of a message content cyclic check of optional adding (CRC) of stream of pulses at random.

ONU-ID is OLT distributes to this ONU when registration a sign.XG-PON uses the territory of 14 bits to indicate the recipient (ONU) of bandwidth at present---and be the sign of ONU or the logic channel of additional allocation ONU.Wherein low 1021 (0-1020) of numerical value are individual is directly to give specific ONU ID, and the Alloc-ID that gives ONU for the first time belongs to this scope.The Alloc-ID that gave ONU afterwards is more than 1023.Alloc-ID=1022 is the mandate time slot that uses when ONU registers in the theactivewindow.Then only using in this patent has 1020 to use for ONU ID, and it is Random Access Channel (RAC) that Alloc-ID=1021 specializes, and the ONU that is used to desire to wake up sends the message of waking up of calling procedure.Alloc-ID remains unchanged greater than 1022 using method.

9) ONU flow chart

Referring to Fig. 5 ONU flow chart.Comprised 3) 4) 5) 6) specified in more detail.

The frame after " initial " wherein:

" registration ": ONU registers to OLT according to the flow process of XG-PON standard, and finishes the deep sleep configuration.

" whether finish registration ": judge whether ONU finishes according to the register flow path and the deep sleep configuration of XG-PON standard.Finish when judging, then enter " normal communication state ".

Communications status after " normal communication state ": ONU registers according to the XG-PON standard implementation.

Correspondence 3 that wherein empty frame " enters deep sleep ") flow process.

Whether when supreme downlink data timer B ultrasonic " ": whether the ONU system detects upstream or downstream data flow, if then do not start timer B.The default excessively value of timer B ultrasonic is " overtime ", and the ONU system is according to timer B " overtime " situation, implementing procedure branch.When not being judged as not, then continue to judge next time, promptly enter once more when supreme downlink data timer B ultrasonic " whether ".When being judged as when being, enter " sending DG message "

" send DG message ": the DG message channel by belonging to PLOAM (perhaps OMCI channel DG message, with reference to the standard of XG-PON) sends the OLT end, informs that OLT enters " deep sleep ".ONU enters " entering deep sleep " after timer RTT is overtime.

Empty frame " inactive " is the rest period of corresponding ONU deep sleep, and this moment, the sending function (TX=0) and the receiving function (RX=0) of ONU PON interface were all closed.

" enter deep sleep ": put deep sleep indication DPI=1,, then enter " ring timer H2 expires " so the sending function of ONU PON interface and receiving function (RX=0) are all closed.

" ring timer H2 expires ": the ONU system detects the value of timer H2, and the ONU system is according to timer H2 " overtime " situation, implementing procedure branch.When being judged as not, then continue to judge next time, promptly enter " ring timer H2 expires " once more.When being judged as when being " whether upstream is arranged " that enters empty frame " inactive ".

Empty frame " active " is half activity time of corresponding ONU deep sleep.

Attention: in this frame, except " start RAC and send 1 " action, ONU PON interface only has receiving function (RX=1) work, and sending function is closed.Have only ONU regularly to get in touch with timer expiry, just start RAC and send 1, at this moment ONU PON interface is opened sending function (TX=1).

" whether upstream data is arranged ": detect whether upstream is arranged, when upstream, change " the normal reception " frame of " leaving deep sleep " empty frame over to.Otherwise change " receiving descending " over to.

" receive descending ": open descending receiving function (RX=1), receive PLOAM message and descending customer data,

" receive PLOAM message ": detect whether to receive PLOAM message or descending customer data, according to whether arriving PLOAM message or descending customer data situation implementing procedure branch.When being judged as not, then enter " contact regularly ".Enter " Paging message " during other situation.

Whether the PLOAM message that " Paging message " detect to receive is Paging, the flow process branch according to whether.When being judged as not, then enter " replacement Inactive timer ".When being judged as " RAC the sends 3 " frame that enters " leaving deep sleep " empty frame when being.Waking ONU for OLT this moment.

" replacement Inactive timer ": replacement Inactive timer, and change " whether upstream data is arranged " over to.

" contact regularly ": detect regularly whether the contact timer is overtime, and implementing procedure branch.When being judged as not, then enter " ring regularly expires ".Enter " start RAC and send 1 " when being when being judged as.

" start RAC and send 1 ": put variable R AC1=1, TX=1; ONU is by the decoding downlink frame, and the search Random Access Channel is in the mandate time slot transmission " heartbeat message " of Random Access Channel.Put variable R AC1=0 again, TX=0, RX=0.And change " ring timer H2 expire " over to.

" ring regularly expires ": the ONU system detects the value of timer H2, and the ONU system is according to timer H2 " overtime " situation, implementing procedure branch.When being judged as not, then enter " whether upstream data is arranged ".Enter " inactive regularly expires " when being when being judged as.

" inactive regularly expires ": the ONU system detects the value of inactive timer, its " overtime " situation of ONU system, implementing procedure branch.When being judged as not, then enter " whether upstream data is arranged ".When being judged as when being, close receiving function (RX=0), enter " ring timer H2 expires ".

Correspondence 5 that empty frame " leaves deep sleep ") flow process.

" RAC sends 3 ": put variable; TX=1 opens the search Random Access Channel, in the mandate time slot transmission " Paging message is confirmed in paging " of Random Access Channel, to confirm to OLT.Change " leaving deep sleep " over to.

" leave deep sleep ": put deep sleep indication DPI=0, open the up sending function of PON link (TX=1), change " normal communication state " over to.

" the normal reception ": open the descending receiving function of PON link (RX=1), change " RAC2 transmission " over to.

" RAC2 transmission ": put variable; TX=1 opens the search Random Access Channel, in the mandate time slot transmission " message of waking up " of Random Access Channel.Change " receiving paging " over to

" receive paging ": the ONU system detects whether receiving the affirmation paging message of waking up, and when being judged as not, then enters " RAC2 transmission ".When being judged as when being, enter " leaving deep sleep ".

10) OLT flow chart

At OLT, corresponding portion's operation " OLT flow chart " of certain ONU is referring to Fig. 6 OLT flow chart.After the ONU registration, OLT produces the corresponding portion (being called for short corresponding portion) of the deep sleep of this ONU automatically.A PON interface comprises several ONU that possess the deep sleep qualification, and several " ONU correspondence portions " are just arranged.During " parameter configuration " also the parameter (H1 and D1) to this ONU correspondence portion dispose, H1 should equal H2.

The OLT flow chart comprises reception DG message, and this is the criterion that this ONU enters deep sleep.

" mandate ascending time slot ": put and authorize permission variable GEi=1 (grant enable), change " receiving DG message " over to.

" receive DG message ": detect corresponding portion and whether receive DG message, judge whether implementing procedure branch.When being judged as not, then enter " mandate ascending time slot ".When being judged as when being, enter empty frame " entering deep sleep " in " awaiting a favorable opportunity ".

Empty frame " is awaited a favorable opportunity " and is write down ONU deep sleep sign, closes the allocated bandwidth of this ONU.Select during the ONU active.Concrete,

" enter deep sleep ": for record ONU deep sleep sign, put variables D PSi=1, and change " stopping uplink authorization " over to.

" stop uplink authorization ": put and authorize permission variable GEi=0 (grant enable), change " RAC message " over to;

" RAC message " detects the message of waking up that whether receives the RAC channel, judges whether with implementing procedure branch.When being judged as not, then enter " ring timer H1 expires ".Enter " leaving deep sleep 1 " in the empty frame " far-end leaves deep sleep ".

" ring timer H1 expire ": whether detect that the ring timer of this ONU expires, judge whether with implementing procedure branch.When being judged as not, then enter " entering deep sleep ".Be to enter " whether downlink data is arranged " in the empty frame of empty frame " active time is corresponding to be sent " when being judged as.

Empty frame " far-end leaves deep sleep " comprising:

" leave deep sleep 1 ": the record deep sleep withdraws from (putting variables D PSi=0), and changes " send Paging message " over to.

" send Paging message ": sending on the PLOAM message channel wakes up confirms Paging message, changes " mandate ascending time slot " over to.

" active time corresponding send " empty frame of OLT flow chart comprises and continues to send PLOAM message during corresponding ONU active, and whether monitoring have downstream data flow, determines to start to send Paging message (entering " leaving deep sleep " empty frame).Concrete,

Whether " whether downlink data is arranged " and detect the data of this ONU, judge whether with implementing procedure branch.When being judged as not, then enter " sending out PLOAM message ".Be to enter " leaving deep sleep 2 " in the empty frame empty frame that " leaves deep sleep " when being judged as.

" send out PLOAM message ": send the PLOAM message of ONU, change " D1 regularly expires and do not have PLOAM and will send " over to.

" D1 regularly expires and does not have PLOAM and will send ": detect whether D1 regularly expires and do not have PLOAM will send, judge whether with implementing procedure branch.When being judged as not, then enter " sending out PLOAM message ".Be to enter empty frame " await a favorable opportunity " " RAC message " in the empty frame when being judged as.

" leaving deep sleep " empty frame of OLT flow chart is the action that OLT wakes ONU.

Empty frame " leaves deep sleep " and comprising:

" leave deep sleep 2 ": the record deep sleep withdraws from (putting variables D PSi=0), and changes " send Paging message " over to.

" send Paging message 2 ": on the PLOAM message channel, send paging Paging message, change " recovery uplink authorization " over to.

" recovery uplink authorization ": put and authorize permission variable GEi=1 (grant enable), change " whether receiving the message of waking up " over to.

" whether receive the paging acknowledge message ": detect whether on RAC, receive " being used to confirm " paging acknowledge message, judge whether with implementing procedure branch.When being judged as not, then enter " keeping sending Paging message ".Be to enter " mandate ascending time slot " when being judged as.

" keep sending Paging message ": on the PLOAM message channel, send and call out Paging message, change " whether receiving the paging acknowledge message " over to.

Claims (3)

1. the power-economizing method of ONU in XG-PON system or the GPON system is characterized in that, may further comprise the steps:

1) in the stipulated time, the PON link of ONU is not received descending customer data, and does not have up customer data to send, and ONU promptly when sending DG message and telling opposite end OLT system, enters deep sleep;

2) enter the ONU of deep sleep, except regular contact OLT, according between inactive state and semi-active state, switching that some cycles replaces,

ONU be in semi-active state during, receive the PLOAM message of downlink frame and possible descending customer data;

ONU be in semi-active state during do not send data to OLT end, sending function is closed;

ONU be in inactive state during, do not receive data, PON link receiving function is closed;

ONU be in inactive state during do not send data to OLT end, sending function is closed;

3) ONU be in semi-active state during, ONU judges according to the paging Paging message of whether receiving down physical layer PLOAM type whether ONU withdraws from from deep sleep, enters normal communication state;

4) ONU be in semi-active state during, have customer data to send needs when ONU judges this ONU up direction, then start calling procedure, to the OLT transmission message of waking up, and ONU withdraws from from deep sleep, enters normal communication state on Random Access Channel;

The ONU that is in calling procedure uses the mandate time slot of the Random Access Channel of OLT distribution, and the mandate time slot of this Random Access Channel is the public uplink random access channel mandate time slot of OLT distribution.

2. the power-economizing method of ONU in XG-PON system as claimed in claim 1 or the GPON system is characterized in that: at the public uplink random access channel mandate time slot of OLT distribution, needed the ONU competition of calling procedure to use arbitrarily.

3. the power-economizing method of ONU in XG-PON system as claimed in claim 1 or 2 or the GPON system is characterized in that: the described cycle of switching between inactive state and semi-active state that replaces is to determine according to a state timer,

When ONU received PLOAM message or downlink data, this state timer of just resetting, this state timer restarted timing to prolong the time that ONU is in semi-active state; When ONU when not receiving PLOAM message or downlink data, this state timer of not resetting;

When this state timer expiry stopped, ONU entered inactive state from semi-active state.

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