KR20110114635A - High-speed optical signal control unit, parent station device, and grant allocation method - Google Patents

Abstract

DBA scheduler unit 43 for outputting report information of the local station (ONU) of the 10G-PON system as the device's own report information, and assigning the grant allocated from the 1G-OLTMAC unit 6 to the ONU, 10G control message terminator 42 for outputting report information to DBA scheduler 43 and 10G control message generator 46 for outputting a gate frame based on the grant allocated by DBA scheduler 43 to ONU. And a 1G control message generating unit 44 which outputs a report frame based on the report information of the DBA scheduler unit 43 to the 1G-OLTMAC unit 6, and the gate information of the 1G-OLTMAC unit 6 as the DBA scheduler. A 1G control message terminating portion 45 for outputting to the portion 43 is provided.

Description

High speed optical signal control unit, friend station and grant allocation method {HIGH-SPEED OPTICAL SIGNAL CONTROL UNIT, PARENT STATION DEVICE, AND GRANT ALLOCATION METHOD}

The present invention relates to a high speed optical signal controller in a PON system in which 1G / 10G coexist.

Recently, the development of a Passive Optical Network (PON) system in which an optical station terminal (OLT: Optical Line Terminal) and a plurality of OUs (Optical Network Unit) are connected by optical fibers has been developed. 1G-PON (1gigabit-Passive Optical Network) systems that perform data communication are becoming popular. In addition, the examination of 10G-PON (10gigabit-Passive Optical Network) system which has accelerated the downlink transmission speed to 10Gbps class is started. In case of introducing 10G-PON system in the area where existing 1G-PON system is operated, it is costly to install new fiber network, so that the operating fiber network is shared with existing 1G-PON system and used by subscriber. Upgrade to 10G-PON system.

There are two ways to upgrade and which one to choose depends on the service type of the carrier. In the following Non-Patent Document 1, a method of coexistence by a time division multiple access (TDMA) method is disclosed as a case where an upward wavelength overlaps at 1G / 10G. In this case, the existing OLT is converted to a 1G / 10G dual rate OLT. Moreover, in the following nonpatent literature 2, when the upstream wavelength does not overlap to 1G / 10G, the coexistence method by WDMA (Wave Division Multiple Access) system is disclosed. In this case, 10G OLT and Wavelength Division Multiplexing (WDM) are added to the existing 1G OLT.

Non-Patent Document 1: IEEE Draft 802.3av D2.0 Non-Patent Document 2: ITU-T G.984.5

However, according to the conventional technique (Non-Patent Document 1), in the case of making an OLT for 1G / 10G by assuming TDMA, the functions of both 10G optical line terminal media access control (OLTMAC) and OLTMAC for 1G are used. OLTMAC for 1G / 10G with For this reason, when all ONUs are switched to 10G ONU after the coexistence state of 1G / 10G, 1G / 10G OLT has a unnecessary 1G circuit, and it is comparatively expensive, and there existed a problem that low power consumption was impossible.

In addition, when the 10G-PON system is newly applied to an area not using the existing 1G-PON system when using the WLT OLT using the OLTMAC common to the 1G / 10G. There was a problem that OLT to be used as an unnecessary 1G circuit was relatively expensive and low power consumption was impossible.

The present invention has been made in view of the above, and an object thereof is to obtain a 10G-OLTMAC (high speed optical signal controller) that can coexist with an existing 1G OLT in a TDMA system while controlling an optical signal of a 10G PON system.

MEANS TO SOLVE THE PROBLEM In order to solve the above-mentioned subject and achieve the objective, this invention is the high speed optical signal which has a high transmission speed, and the slow optical signal which is slower than the said high speed optical signal are mixed, and in the PON system which communicates an uplink signal by TDMA system, A high speed optical signal control device in a parent apparatus having a high speed optical signal control device that controls transmission and reception of an optical signal and a low speed optical signal control device that controls transmission and reception of a low speed optical signal, wherein the high speed optical signal control device communicates using a high speed optical signal. A high speed optical signal control message terminating means for receiving a report frame from a high speed optical signal PON local station, which is a local station, and extracting report information from the frame, and receiving a Gate frame from the low speed optical signal control device; A low speed optical signal control message terminating means for extracting gate information and the high speed optical signal agent; When the report information is acquired from the message terminating means, the report information is generated and output again as the report information of the parent station device itself, and when the gate information is acquired from the low speed optical signal control message terminating means, the high speed optical signal control is performed. Based on the report information obtained from the message terminating means, grant assignment means for allocating a grant allocated to the master station itself to the high speed optical signal PON local station and a report frame based on the report information obtained from the grant assignment means. A low speed optical signal control message generating means for outputting the report frame to the low speed optical signal control device, a gate frame is generated based on a grant allocated by the grant allocation means, and the gate frame is generated by the high speed optical signal; High speed optical signal output to PON local station It characterized in that it comprises a message generating means.

The 10G-OLTMAC (High Speed Optical Signal Control Unit) according to the present invention can be easily and inexpensively added a configuration for 10G-OLT in the TDMA system, and it is possible to lower power consumption after the transition to the 10G-PON system. Effect. In addition, even when using the WDMA system or deploying the 10G-PON system in an area where the 1G-PON system is not used, the common 10G-OLTMAC is continuously used, thereby increasing the power consumption without increasing the cost. The effect is that it can be avoided.

1 is a diagram showing an example of the configuration of a 1G / 10G OLT unit;
2 is a diagram showing a wavelength arrangement of signals;
3 is a time chart showing a process up to transmitting data;
4 (a) is a diagram showing a configuration example of a TDMA system in which a 10G-PON system is added;
4 (b) is a diagram showing a configuration example of a WDMA system in which a 10G-PON system is added;
5 is a diagram illustrating a state transition of an upgrade to a 10G-PON system.
Explanation of symbols for the main parts of the drawings
1 WDM part 2 Splitter part
3: 10G-PHY section 4: 10G-OLTMAC section
5: WDM part 6: 1G-OLTMAC part
7: WDM section 8: WDM section
9: 1G-PHY unit 31: receiver
32: BCDR section 33: transmitting section
41: WDM section 42: 10G control message termination section
43: DBA scheduler 44: 1G control message generator
45: 1G control message termination 46: 10G control message generation
47: WDM section 61: WDM section
62: 1G control message end 63: DBA scheduler
64: 1G control message generating unit 65: WDM unit
91: receiver 92: BCDR unit
93: transmitter 100: 1G / 10G-OLT

EMBODIMENT OF THE INVENTION Below, the Example of 10G-OLTMAC which concerns on this invention is described concretely based on drawing. In addition, this invention is not limited by this Example.

(Example)

In the present embodiment, an OG (Optical Line Terminal) including 10G-OLTMAC (Optical Line Terminal Media Access Control) is used by an ONU of an 1G-PON system and an ONU of a 10G-PON system. Control PON systems that are connected in plural. Fig. 1 is a diagram showing an example of the configuration of a user equipment 1G / 10G-OLT including 10G-OLTMAC in the present embodiment. The 1G / 10G-OLT unit 100 controls the communication with the ONU connected to the 1G-PON system and also controls the communication with the ONU connected to the 10G-PON system. The 1G / 10G-OLT unit 100 includes a WDM (Wavelength Division Multiplexing) unit 1, a splitter unit 2, a 10G-PHY (Physical Layer Device) unit 3, and a 10G-OLTMAC unit 4. And a WDM unit 5, a 1G-OLTMAC unit 6, a WDM unit 7, a WDM unit 8, and a 1G-PHY unit 9.

The WDM unit 1 outputs an optical signal from each ONU received from the PON interface to the splitter unit 2. Further, the optical signal after the combining received from the WDM unit 8 is output to each ONU via the PON interface. The splitter section 2 is a splitter splitting 1: 2 and outputs the received 1G / 10G mixed uplink optical signal to the 10G-PHY section 3 and the 1G-PHY section 9.

The 10G-PHY unit 3 performs transmission and reception of 10G optical signals in the 10G-PON system. When an optical signal is received, a process of converting it into an electrical signal is performed, and the electrical signal received from the 10G-OLTMAC unit 4 is converted into an optical signal. The 10G-PHY unit 3 includes a receiver 31, a burst clock and data recovery (BCDR) unit 32, and a transmitter 33. The receiver 31 converts the received optical signal into an electrical signal and outputs the electrical signal. The BCDR unit 32 separates the clock and data from the bursted electrical signal to perform bit synchronization. The transmitter 33 converts a signal to be transmitted from an electric signal to an optical signal.

The 10G-OLTMAC unit 4 is an OLT MAC unit for controlling the 10G-PON system. In the present embodiment, when the 10G-OLTMAC unit 4 is connected to the 1G-OLTMAC unit 6, the 10G-OLTMAC unit 4 operates as an ONU with respect to the 1G-OLTMAC unit 6. The 10G-OLTMAC unit 4 includes a WDM unit 41, a 10G control message termination unit 42, a dynamic bandwidth allocation (DBA) scheduler unit 43, a 1G control message generating unit 44, and 1G control. A message terminator 45, a 10G control message generator 46, and a WDM unit 47 are provided.

The WDM unit 41 branches the signal from the 10G-PHY unit 3 and outputs it to the 10G control message generation unit 42 and the SNI (Service Node Interface). The 10G control message terminator 42 extracts Report information from the Report frame from each ONU connected to the 10G-PON system and outputs it to the DBA scheduler 43. The DBA scheduler 43 regenerates the device information as the report information of the device itself based on the report information from the 10G control message section 42 and outputs it to the 1G control message section 44. In addition, based on the report information from each ONU connected to the 10G-PON system, control to allocate the band (grant) allocated by the 1G-OLTMAC unit 6 to each ONU connected to the 10G-PON system is performed. Do it. The 1G control message generation unit 44 generates a report frame as the 10G-OLTMAC unit 4 (10G-PON system) based on the report information from the DBA scheduler unit 43 and sends it to the 1G-OLTMAC unit 6. Output The 1G control message termination unit 45 extracts the gate information from the Gate frame received from the 1G-OLTMAC unit 6 and outputs the gate information to the DBA scheduler unit 43. The 10G control message generator 46 generates a gate frame based on the grant allocated by the DBA scheduler 43, and outputs the gate frame to each ONU of the 10G-PON system. The WDM unit 47 combines the gate frame from the 10G control message generation unit 46 and the signal from the SNI and outputs the signal to the 10G-PHY unit 3.

The WDM unit 5 combines a multi-point control protocol (MPCP) control frame from the 10G-OLTMAC unit 4 and a received signal from the 1G-PHY unit 9 and outputs it to the 1G-OLTMAC unit 6. do. The MPCP control frame includes a report frame and a gate frame.

The 1G-OLTMAC section 6 is the MAC section of the OLT that controls the 1G-PON system. In addition, the 10G-OLTMAC section 4 is assigned a grant in TDMA similarly to the ONU in the 1G-PON system. The 1G-OLTMAC unit 6 includes a WDM unit 61, a 1G control message termination unit 62, a DBA scheduler unit 63, a 1G control message generation unit 64, and a WDM unit 65. do.

The WDM unit 61 branches the signal from the WDM unit 5 and outputs it to the 1G control message generation unit 62 and the SNI. The 1G control message terminator 62 extracts Report information from the Report frames from each ONU and 10G-OLTMAC unit 4 connected to the 1G-PON system, and outputs it to the DBA scheduler 63. The DBA scheduler unit 63 grants grants to each ONU and 10G-OLTMAC unit 4 of the 1G-PON system based on Report information from each ONU and 10G-OLTMAC unit 4 of the 1G-PON system. Control to allocate is performed. The 1G control message generating unit 64 generates a gate frame based on the grant allocated by the DBA scheduler 63, and outputs it to each ONU and 10G-OLTMAC unit 4 of the 1G-PON system. The WDM unit 65 combines the gate frame from the 1G control message generation unit 64 with the signal from the SNI and outputs the signal to the WDM unit 7.

The WDM unit 7 branches the signal from the 1G-OLTMAC unit 6 and outputs it to the 10G-OLTMAC unit 4 and the 1G-PHY unit 9. The WDM unit 8 combines the downward 10G optical signal from the 10G-PHY unit 3 and the downward 1G optical signal from the 1G-PHY unit 9 and outputs it to the WDM unit 1.

The 1G-PHY unit 9 transmits and receives a 1G optical signal in the 1G-PON system. When an optical signal is received, a process of converting it into an electrical signal is performed, and the electrical signal received from the 1G-OLTMAC unit 6 is converted into an optical signal. The 1G-PHY unit 9 includes a receiver 91, a BCDR unit 92, and a transmitter 93. The receiver 91 converts the received optical signal into an electrical signal and outputs the electrical signal. The BCDR unit 92 separates the clock and data from the bursted electrical signals to perform bit synchronization. The transmitter 93 converts a signal to be transmitted from an electric signal to an optical signal.

Next, the wavelength arrangement of the signal in each PON system used in the present embodiment will be described. 2 is a diagram illustrating wavelength arrangement of each signal. In the existing 1G-PON system defined by the IEEE, the uplink signal is in the 1260 to 1360 nm band and the falling signal is in the 1480 to 1500 nm band. On the other hand, in the newly added 10G-PON system, the uplink signal is in the 1260 to 1280 nm band and the falling signal is in the 1574 to 1580 nm band. In this way, since the bands of the uplink signal overlap, the OLTMAC unit capable of assigning grants in the TDMA system is required for both 1G and 10G PON systems.

On the other hand, in the 1G-PON system defined by ITU-T, since the 1G uplink signal is mainly in the reduced type (band is 1290 to 1330 nm), the bands of signals to be used do not overlap. For this reason, coexistence by the WDMA system becomes possible.

Next, transmission and reception of signals between the OLT and the ONU in each PON system in the present embodiment will be described. 3 is a time chart showing processing until the ONU of each PON system transmits data. Here, two ONUs (10G-ONU # 1 and 10G-ONU # 2) are connected to the 10G-PON system. In addition, the 10G-OLTMAC unit 4 is connected to the 1G-PON system as two ONUs (1G-ONU # 1, 1G-ONU # 2) and 1G-ONU # 3. The processing when transmitting data based on the assigned grant after each ONU transmits a Report frame will be described.

First, the process until 10G-ONU # 1 transmits data will be described. In order to transmit data, the 10G-ONU # 1 transmits a Report frame including Report information to the 10G-OLTMAC unit 4. The 1G / 10G-OLT unit 100 receives a report frame from the WDM unit 1, branches off from the splitter unit 2, and outputs the report frame to the 10G-PHY unit 3. Here, the reception unit 31 converts the optical signal into an electrical signal, performs a bit synchronization by separating the clock and data from the BCDR unit 32, and then outputs a Report frame to the 10G-OLTMAC unit 4. In the 10G-OLTMAC section 4, the 10G control message termination section 42 receives a Report frame via the WDM section 41. The 10G control message terminator 42 extracts Report information from the Report frame and outputs it to the DBA scheduler 43. After receiving the report information from the other ONU (10G-ONU # 2), the DBA scheduler unit 43 reports the report information from each 10G-ONU to the report of the 10G-OLTMAC unit 4 (1G-ONU # 3). The information is generated as information and output to the 1G control message generating unit 44. The 1G control message generating unit 44 generates a Report frame as the 10G-OLTMAC unit 4 (1G-ONU # 3) based on the received Report information, and then generates the 1G- via the WDM unit 5. Output to OLTMAC section 6.

In the 1G-OLTMAC section 6, the 1G control message terminating section 62 receives a Report frame via the WDM section 61. The 1G control message terminator 62 extracts the report information from the Report frame and outputs it to the DBA scheduler 63. The DBA scheduler 63 receives the report information from the other ONUs (1G-ONU # 1, 1G-ONU # 2), and then assigns the band (grant) in Cycle # n to each ONU based on the respective report information. Control to allocate is performed. At this time, the grant allocated to 1G-ONU # 3 (10G-OLTMAC unit 4) may be fixed by changing DBA parameters or may be variable based on Report information from 1G-ONU # 3. The grant allocated to each ONU is outputted to the 1G control message generator 64. The 1G control message generation unit 64 generates a gate frame to 1G-ONU # 3 (10G-OLTMAC unit 4) based on the grant allocated to 1G-ONU # 3 (10G-OLTMAC unit 4). And output to the WDM unit 7 via the WDM unit 65. The WDM unit 7 outputs the gate frame in front of the 1G-ONU # 3 (10G-OLTMAC unit 4) to the 1G-ONU # 3 (10G-OLTMAC unit 4).

In the 10G-OLTMAC section 4, the 1G control message termination section 45 extracts Gate information from the Gate frame and outputs it to the DBA scheduler section 43. The allocated grant included in this Gate information (Grant for 10G-PON starting from Grant Starttime (GS) 3) is a grant assigned to 1G-ONU # 3 (10G-OLTMAC section 4), and 10G- It is also a grant assigned to a PON system. The DBA scheduler 43 first synchronizes the time stamp with the 1G-OLTMAC unit 6 based on the received Gate information. Thus, the start time of the grant is matched in the slot of Cycle # n for transmitting data. Subsequently, based on the Report information from 10G-ONU # 1 and 10G-ONU # 2, the control which further allocates the grant allocated from 1G-OLTMAC part 6 to each 10G-ONU is performed. The grant allocated to each ONU is output to the 10G control message generation unit 46. The 10G control message generation unit 46 generates a Gate frame in front of the 10G-ONU # 1 based on the grant allocated to the 10G-ONU # 1, and outputs it to the 10G-PHY unit 3 via the WDM unit 47. do.

In the 10G-PHY section 3, the transmitter 33 converts the gate frame into an optical signal and outputs it to the WDM section 8. The WDM unit 8 combines the optical signal (Gate frame) from the 10G-PHY unit 3 and the optical signal from the 1G-PHY unit 9 and outputs it to the WDM unit 1. The WDM unit 1 outputs the signal after the combining to the 10G-ONU # 1 via the PON interface. The 10G-ONU # 1 receives the Gate frame and transmits data according to the start timing GS3 and the grant length of the allocated grant. Thereafter, the 10G-ONU # 1 transmits data in accordance with the Gate frame from the 10G-OLTMAC unit 4. On the other hand, when there is data to be transmitted subsequently, the 10G-ONU # 1 transmits a Report frame to the 10G-OLTMAC unit 4 in accordance with the transmission of the data.

The processing from the 10G-ONU # 2 to sending the Report frame to the 10G-OLTMAC unit 4 and receiving the Gate frame and transmitting the data is the same as in the case of the 10G-ONU # 1. The 10G-ONU # 2 transmits data in accordance with the start timing GS4 and the grant length of the grant assigned to the 10G-ONU # 2.

In this way, the 10G-OLTMAC unit 4 transmits Report information from each 10G-ONU connected to the 10G-PON system to the 1G-OLTMAC unit 6 as Report information of 1G-ONU # 3. The 1G-OLTMAC unit 6 assigns a grant to 1G-ONU # 3 (10G-OLTMAC unit 4) in the same processing as other 1G-ONUs. The 1G-ONU # 3 (10G-OLTMAC unit 4) can control the transmission and reception of data in the 10G-PON system by reassigning the grant allocated to the device itself to each 10G-ONU. That is, the grant in Cycle # n can be used without granting the grant allocated for 1G-PON and the grant allocated for 10G-PON. In the present embodiment, the 10G-OLTMAC section 4 operates as a 1G-ONU with respect to the 1G-OLTMAC section 6, so that the 1G-PON system and the 10G-PON system can coexist. On the other hand, the 10G-OLTMAC unit 4 operates as a master when there is no 1G-OLTMAC unit 6 (10G-PON system).

Next, the process until 1G-ONU # 1 transmits data is demonstrated. In order to transmit data, the 1G-ONU # 1 transmits a Report frame including Report information to the 1G-OLTMAC unit 6. The 1G / 10G-OLT unit 100 receives a report frame from the WDM unit 1, branches off from the splitter unit 2, and outputs the report frame to the 1G-PHY unit 9. Here, the reception unit 91 converts the optical signal into an electrical signal, and the BCDR unit 92 separates the clock and data to perform bit synchronization, and then outputs a report frame to the WDM unit 5. The WDM unit 5 outputs a report frame to the 1G-OLTMAC unit 6. In the 1G-OLTMAC section 6, the 1G control message terminating section 62 receives a Report frame via the WDM section 61. The 1G control message terminator 62 extracts Report information from the Report frame and outputs it to the DBA scheduler 63. The DBA scheduler 63 receives the report information from the other ONUs (1G-ONU # 2, 1G-ONU # 3 (10G-OLTMAC unit 4)), and then assigns to each ONU based on the respective report information. Control to assign a grant in Cycle # n is performed. The grant allocated to each ONU is outputted to the 1G control message generator 64. The 1G control message generation unit 64 generates a gate frame to the 1G-ONU # 1 based on the grant allocated to the 1G-ONU # 1, and outputs the gate frame to the WDM unit 7 via the WDM unit 65. .

The WDM unit 7 outputs a gate frame directed to 1G-ONU # 1 to the 1G-PHY unit 9. In the 1G-PHY unit 9, the transmitter 93 converts the gate frame into an optical signal and outputs it to the WDM unit 8. The WDM unit 8 combines the optical signal (Gate frame) from the 1G-PHY unit 9 and the optical signal from the 10G-PHY unit 3 and outputs it to the WDM unit 1. The WDM unit 1 outputs the signal after the combining to 1G-OMU # 1 via the PON interface. The 1G-ONU # 1 receives the Gate frame and transmits data according to the start timing GS1 and the grant length of the assigned grant. The 1G-ONU # 1 then transmits data in accordance with the Gate frame from the 1G-OLTMAC unit 6. On the other hand, when there is data to be transmitted subsequently, the 1G-ONU # 1 transmits a Report frame to the 1G-OLTMAC unit 6 in accordance with the transmission of the data.

The processing from 1G-ONU # 2 to sending the Report frame to the 1G-OLTMAC unit 6 and receiving the Gate frame and transmitting the data is the same as in the case of 1G-ONU # 1. The 1G-ONU # 2 transmits data in accordance with the start timing GS2 and the grant length of the grant assigned to the 1G-ONU # 2.

The configuration of a system for providing a 10G-PON service using the 10G-OLTMAC unit 4 will be described for the TDMA method and the WDMA method. 4 (a) and 4 (b) show the configuration of the system when a 10G-PON system is added in each system. In Fig. 4A, as a TDMA method, 1G / 10G-OLT is newly configured by using all the configurations used for the existing 1G-OLT. On the other hand, unlike FIG. 1, when the PHY unit is a dual rate, it is also possible to use one receiver unit.

In addition, in FIG. 4B, the existing 1G-OLT is used as it is as the WDMA method, and 10G-OLT and WDM are newly added. By using the 10G-OLTMAC of the present embodiment, both TDMA and WDMA systems can be used in common, and both systems can configure a PON system in which 1G / 10G coexist without obsolete the existing configuration. In the case of LSI of the 10G-OLTMAC, the circuit scale can be made smaller than the case of making a 1G / 10G dual rate OLTMAC.

Next, a specific example of upgrading to the 10G-PON system is shown in FIG. 5. While operating the existing ODN (Optical Distribution Network), upgrades will be made by adding 10G-OLT to operators that cannot exchange 1G-OLT. First, 10G-OLT is expanded with respect to the existing 1G-PON system (FIG. 5 (a)). Thereafter, the user sequentially switches from 1G-ONU to 10G-ONU (Fig. 5 (c)). Finally, when all users switch to 10G-ONU, 1G-OLT is removed (Fig. 5 (d)). The 10G-OLT to be expanded can be specialized to build a new service for 10G, and can also remove 1G-OLT when it becomes unnecessary. It is applicable to either the TDMA method or the WDMA method.

As described above, in this embodiment, the 10G-OLTMAC is treated as an ONU of the 1G-PON system when connected to the 1G-OLTMAC, so that the report information from each ONU connected to the 10G-PON system is used as one 1G-ONU. It was collected and transmitted to 1G-OLTMAC, and the grant allocated to the device itself was allocated to each ONU connected to the 10G-PON system. As a result, it is possible to easily upgrade while using the existing 1G-OLT configuration as it is, and to reduce the power consumption by removing the configuration of the 1G-OLT when it is no longer needed.

On the other hand, although the present embodiment has been described using the term 10G-PON, it is assumed that 10G-EPON (10Gigabit-Ethernet (registered trademark) Passive Optical Network) specified by IEEE is included.

(Industrial availability)

 As described above, the 10G-OLTMAC according to the present invention is useful for a PON system, and is particularly suitable for upgrading from a 1G-PON system to a 10G-PON system.

Claims (7)

A high speed optical signal control device for controlling the transmission and reception of a high speed optical signal in a PON system in which a high speed optical signal having a high transmission speed and a low speed optical signal slower than the high speed optical signal are mixed, and employing the TDMA method for uplink signal communication, A high speed optical signal control device in a parent station device having a low speed optical signal control device that controls transmission and reception of an optical signal,
High speed optical signal control message terminating means for receiving a report frame from a high speed optical signal PON local station which is a child station device which communicates using a high speed optical signal, and extracting report information from the frame;
A low speed optical signal control message terminating means for receiving a Gate frame from the low speed optical signal control device and extracting Gate information from the frame;
When Report information is acquired from the high speed optical signal control message terminating means, when the Report information is generated and output again as Report information of the parent station device itself, and when Gate information is obtained from the low speed optical signal control message terminating means, Grant allocation means for allocating a grant assigned to the parent apparatus itself to the fast optical signal PON local station based on the Report information obtained from the fast optical signal control message terminating means;
Low speed optical signal control message generating means for generating a report frame based on the report information acquired from the grant assignment means, and outputting the report frame to the low speed optical signal control device;
High speed optical signal control message generating means for generating a gate frame based on the grant allocated by the grant assigning means, and outputting the gate frame to the high speed optical signal PON local station.
High speed optical signal control device comprising a.
The method of claim 1,
And said grant assignment means synchronizes time stamp with said low speed optical signal control device when the gate information is acquired from said high speed optical signal control message terminating means.
A high speed optical signal control device for controlling transmission and reception of the high speed optical signal in a PON system in which a high speed optical signal having a high transmission speed is mixed with a low speed optical signal slower than the high speed optical signal, and employing a WDMA method for communication of an uplink signal. A high speed optical signal control device in a parent apparatus provided with a device,
High speed optical signal control message terminating means for receiving a report frame from a high speed optical signal PON local station which is a local station that communicates using a high speed optical signal, and extracting report information from the frame;
Grant allocation means for allocating a grant to the high speed optical signal PON slave device based on the Report information when report information is obtained from the high speed optical signal control message terminating means;
High speed optical signal control message generating means for generating a gate frame based on the grant allocated by the grant assigning means, and outputting the gate frame to the high speed optical signal PON local station.
High speed optical signal control device comprising a.
A high-speed optical signal having a high transmission speed and a low-speed optical signal slower than the high-speed optical signal are mixed, and a PON system adopting the TDMA method for communication of an uplink signal, the station apparatus for controlling the transmission and reception of the high-speed optical signal and the low-speed optical signal. as,
The high speed optical signal control device according to claim 1 or 2,
The low speed optical signal PON local apparatus which receives a report frame from the low speed optical signal PON local apparatus which is a local station which communicates using a low speed optical signal, and the said high speed optical signal control apparatus, and reports based on the report information contained in the report frame. And assigning a grant to the high speed optical signal control device, and generating a gate frame including information on the allocated grant, and outputting the gate frame to the low speed optical signal PON local device and the high speed optical signal control device. Low speed optical signal controller
A friend station device comprising: a.
The method of claim 4, wherein
And the low speed optical signal transmitting and receiving device allocates a fixed grant length when allocating a grant to the high speed optical signal control device.
The method of claim 4, wherein
The low speed optical signal transmission / reception apparatus, when the grant is assigned to the high speed optical signal control apparatus, is appropriately changed and assigned a grant length based on Report information from the high speed optical signal control apparatus. .
A grant allocation method in a PON system in which a high speed optical signal having a high transmission speed and a low speed optical signal slower than the high speed optical signal are mixed and employ a TDMA method for communication of an uplink signal,
The friend device,
A high speed optical signal control device for controlling transmission and reception of a high speed optical signal;
Low speed optical signal control device that controls the transmission and reception of low speed optical signal
In the case of having
A high speed optical signal PON local station, which is a local station communicating by using a high speed optical signal, for transmitting a report frame to the high speed optical signal control device;
A control device report transmitting step, wherein the high speed optical signal control device regenerates a report frame received from the high speed optical signal PON local station as a report frame of the master device itself and outputs it to the low speed optical signal control device;
Report information included in each of the report frame received from the low speed optical signal PON local station which is a local station that the low speed optical signal control device communicates using the low speed optical signal, and the report frame received from the high speed optical signal control unit. A low speed optical signal grant assignment step of allocating a grant based on
A low speed optical signal gate transmission step of generating a gate frame based on a grant allocated by the low speed optical signal control device, and outputting the gate frame to the high speed optical signal control device;
A high speed optical signal for assigning, to the high speed optical signal PON local apparatus, a grant allocated to the parent apparatus itself based on report information included in a report frame received by the high speed optical signal PON local apparatus. Grant allocation step,
A high speed optical signal gate transmitting step of generating, by the high speed optical signal control device, a gate frame based on the assigned grant and outputting the gate frame to the high speed optical signal PON local station;
Grant allocation method comprising a.

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