WO2004064336A1

WO2004064336A1 - Method for automatically registering slave station in pon system and master and slave stations

Info

Publication number: WO2004064336A1
Application number: PCT/JP2003/000165
Authority: WO
Inventors: Masamichi Kasa; Masahiko Iwakiri; Katsuhiko Hirashima; Kazuhiro Uchida; Susumu Tominaga; Shigeharu Murakami; Shiro Mori; Osamu Sekihata
Original assignee: Fujitsu Limited
Priority date: 2003-01-10
Filing date: 2003-01-10
Publication date: 2004-07-29
Also published as: AU2003201864A1

Abstract

A method for automatically registering a slave stations in a PON system is performed as follows. A master station notifies a plurality of slave stations of a time slot at which transmission of a registration request to the master station is allowed. A slave station requesting a registration to the master station generates a registration request containing an identifier inherent to the slave station and transmits it at the time slot notified. The master station receives the registration request, compares the inherent identifier contained in the registration request received with an inherent identifier managed in the master station, and, according to the comparison, registers the inherent identifier contained in the registration request received into the information on the inherent identifiers managed in the master station.

Description

Automatic registration method of slave station in PON system, master station and slave station in PON system

The present invention relates to a method for automatically registering a slave station in a PON system, a master station and a slave station in a PON system, and more particularly, to automatically register a master station when a new slave station is connected. The present invention relates to a method for automatically registering a slave station in a PON system, and a master station and a slave station in a PON system. Background art

As a network system using an optical fiber, a PON (Passive Optical Network) system has attracted attention. This PON system has a network configuration in which a master station and a slave station are connected one-to-many via an optical power plug to perform communication. In this network configuration, communication is performed by the continuous transmission method in the downstream direction (master station to slave station), and communication is performed by the TDMA transmission method in the upstream direction (slave station to master station). The PON method is specified in ITU-TG. 93.1.

In addition, this ITU-T recommendation G.983.1 specifies the concept of ranging. This ranging refers to a method and procedure for adjusting the delay of each slave station so that the uplink packets of the slave stations do not collide in the PON system. The ranging described in this specification has the same concept as the ranging defined in the above recommendation.

In the conventional PON system, when a slave station is newly connected under the master station, a number unique to the slave station to be connected is registered in the master station by an operator registration operation. The master station uses this registered unique number to control communication with each slave station.

FIG. 1 is a block diagram showing a conventional PON system. In this PON system, the slave stations 2A to 2N are connected to the master station 1. In the slave station table 3, a management number and a number unique to the slave station such as a MAC (Media Access Control) address correspond. be registered.

For example, when the slave tape and the slave 3 A have been registered by the operator 4 ^ 2, the slot allocating unit 7 receives the management number and the MAC address of the slave 2 A recognized by the slave management unit 5, and goes up ( Slave station → master station) Allocate a time slot in the ranging response area of the frame to slave station 2A.

The control generation unit 9 generates a control slot for transmitting the MAC address of the slave station 2A. The MAC address of the slave station 2A is transmitted in a time slot corresponding to the slot assigned by the slot assignment unit 7 in the slot assignment area in the control slot of the downlink (master station → slave station) frame. The generated controller slot is multiplexed by the multiplexing unit 11 together with the downlink data packet, and is broadcast from the transmitting unit 13 to each of the slave stations 2A to 2N. The broadcasted downstream frame is received by the receiving section 23 of the slave station 2A, and is supplied to the control separating section 25. The slot detecting unit 29 detects the MAC address addressed to the slave station 2A itself and the slot number to which the MAC address is supplied in the slot allocation area of the control slot supplied from the control separating unit 25.

In response to the detection by slot detecting section 29, delay packet section 31 creates a ranging response bucket for transmitting the MAC address of slave station 2A. This MAC address is transmitted in the time slot to which the MAC address is supplied in the ranging response area of the upstream frame. This ranging response packet is transmitted from transmitting section 35 to main station 1 via multiplexing section 83-1.

The transmitted upstream frame is received by the receiving unit 15 of the main station 1 and supplied to the packet extracting unit 17. The packet extracting unit 17 is an MA that matches the MAC address supplied from the slot allocating unit 7 in the upstream frame supplied from the receiving unit 15. Extract the packet containing the address. The delay measuring section 19 calculates the time from the time when the MAC address matching the MAC address supplied from the slot allocating section 7 is received from the packet extracting section 17 to the time when the master station 1 reaches its reference phase. The difference is measured as a delay value. This delay value is registered in the delay table 21 and also supplied to the control generation unit 9. The control generation unit 9 generates a control slot for transmitting the MAC address and the delay value of the slave station 2A. The MAC address and delay value of the slave station 2A are transmitted in the time slot of the delay indication area in the control slot of the downstream frame. The generated control slot is multiplexed by the multiplexing unit 11 together with the downlink data packet, and is broadcast from the transmitting unit 13 to each of the slave stations 2A to 2N.

This broadcasted downstream frame is received by the receiving section 23 of the slave station 2A, and is supplied to the control separating section 25. The delay adjusting unit 27 detects the MAC address and delay value addressed to the slave station 2A itself included in the delay instruction area of the control slot supplied from the control separating unit 25. Thereafter, the delay value to be corrected is supplied to the delay adjusting unit 27 each time the downstream frame is received. On the other hand, the slave station management unit 5 allocates a time slot in the user band of the uplink frame for actually communicating with the slave station 2A according to the calculation of the delay value by the delay measurement unit 19. The control generation section 9 generates a control slot for transmitting the MAC address of the slave station 2A. The MAC address of the slave station 2A is transmitted in a time slot corresponding to the time slot assigned by the slave station management unit 5 in the slot assignment area in the control slot of the downstream frame. The generated control slot is multiplexed with the downlink data packet by the multiplexing unit 11, and is broadcast from the transmitting unit 13 to each of the slave stations 2A to 2N.

The broadcasted downstream frame is received by the receiving section 23 of the slave station 2A, and is supplied to the control separating section 25. The slot detection unit 29 detects the MAC address addressed to the station 2A itself according to the data in the slot allocation area of the control slot supplied from the control separation unit 25, and the slot number to which the MAC address is supplied. I do. The delay adjustment unit 27 is configured to perform a multiplexing unit based on the slot number supplied from the slot detection unit 29 and the delay value supplied from the slot detection unit 29 when the downlink frame is received. 3 Adjust the processing of 3.

In the conventional PON system described above, when a slave station is newly connected to the master station, the operator 4 operates until the newly installed slave station 2A and the master station 1 can communicate with each other. Registration work is required on the master station 1 side. Also, in this registration work Therefore, if the MAC address of the slave station connected to the master station 1 is not set correctly, there is a problem in that communication between the slave station 2 A newly connected and the master station 1 cannot be performed.

There is a need for a PON system that can automatically perform a registration operation without relying on a manual registration operation via an operator when a slave station is newly connected to the master station. Disclosure of the invention

An object of the present invention is to provide a method for automatically registering a slave station in a PON system, which solves the above-mentioned problems of the prior art, and to ^ ft a master station and a slave station in a PON system.

In order to achieve this object, a method for automatically registering a slave station in a PON system according to the present invention includes: a master station notifying a plurality of slave stations of a time slot in which transmission of a registration request to the master station is permitted; A slave station requesting registration from the master station, generates a registration request including an identifier unique to the slave station, transmits the registration request to the master station in the notified time slot, receives the registration request at the master station, and Based on a comparison between the unique identifier included in the received registration request and the unique assignee managed by the master station, the master identifier manages the mechanical identifier included in the received registration request. Registered in the unique identifier information.

According to such an automatic registration method of the slave station in the PON system, a slave station newly connected to the master station can be automatically registered without performing a manual registration operation via the operator. BRIEF DESCRIPTION OF THE FIGURES

Other objects, features and advantages of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings.

FIG. 1 is a block diagram showing a conventional PON system.

FIG. 2 is a block diagram showing a PON system according to the first embodiment of the present invention.

FIG. 3 shows the format of an upstream frame used throughout the embodiment of the present invention. FIG.

FIG. 4 is a diagram illustrating a format of a downstream frame used throughout the embodiment of the present invention and details thereof.

FIG. 5 is a diagram illustrating the operation of the PON system according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing a PON system according to the second embodiment of the present invention.

FIG. 7 is a diagram for explaining a mechanism in which registration request packets collide when the PON system is operated without performing delay adjustment.

FIG. 8 is a diagram exemplifying a concept of an operation operation by general delay adjustment.

FIG. 9 is a block diagram illustrating a PON system according to the third embodiment of the present invention.

FIG. 10 is a block diagram illustrating a PON system according to the fourth embodiment of the present invention.

FIG. 11 is a block diagram showing a PON system according to a fifth embodiment of the present invention.

FIG. 12 is a diagram illustrating the operation of the queuing generation unit and the queuing control unit of the PON system according to the fifth embodiment of the present invention.

FIG. 13 is a block diagram showing a P • N system according to the sixth embodiment of the present invention.

FIG. 14 is a block diagram showing a PON system according to the seventh embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Note that, throughout the first to seventh embodiments described below, components having the same or similar functions are denoted by reference numerals suffixed with the version of the embodiment. For example, the master station in the first embodiment is denoted by reference numeral 37-1, and the master station in the second embodiment is denoted by reference numeral 37-2. did Therefore, only one component will be described only when the processing is different between the embodiments.

FIG. 2 is a block diagram showing a PON system according to the first embodiment of the present invention. In this figure, as a part of the PON system according to the present embodiment, only the master station 37-1 and the slave stations 39A-1 to 39N-1 connected to the master station 37-1 are provided. It is illustrated.

The master 37-1 is a slave table 41-1, a slave manager 43-1, a slot allocator 45-1, a control generator 61-1, a multiplexer 63-1, and a transmitter 6. It is composed of 5-1, receiving section 53-1, packet extracting section 55-1, delay measuring section 57-1 and delay table 59-1. Further, the main station 37-1 has a registration judging unit 47-1, a number extracting unit 49-11, and a slot instructing unit 51-1.

The receiving unit 53-1 receives the uplink frames supplied from the slave stations 39 A-1 to 39 N_1 and demodulates the received uplink frames. In particular, the receiving unit 53-1 is a packet for requesting registration with the master station 37-1, which is transmitted from a slave station newly trying to connect to the master station 37-1 (hereinafter referred to as a registration request packet). ), And a packet that responds to the delay measurement instruction (hereinafter called a ranging response packet), etc. (see Fig. 5).

The packet extracting unit 55-1 extracts the packet of the upstream frame supplied from the receiving unit 53-1. In particular, the packet extraction unit 55-1 extracts the packets in the ranging response area (slots R # 1 to R # 3 shown in FIG. 3) of the upstream frame and supplies them to the number extraction unit 491-1. .

Also, the bucket extracting unit 55-1 is a MAC address that matches the MAC address supplied from the slot allocating unit 45-1 among the MAC addresses included in the packets in the ranging response area of the upstream frame. Is extracted and supplied to the delay measuring section 57_1.

The number extraction unit 491-1 individually extracts the MAC address included in the ranging response area supplied from the bucket extraction unit 55-1, according to the instruction of the registration determination unit 47-1 I do.

The registration judging unit 47-1 uses the MAC address supplied from the number extracting unit 491-1 It is determined whether or not the registered slave station has the power to register the slave station in the slave station table 41-1. In particular, the registration judging section 47-1, newly registers the slave station having the MAC address even if the MAC address supplied from the number extracting section 49-1 is not registered in the slave station table 41-1. Recognize that it should be a slave station.

Further, the registration judging section 47-1, in accordance with the result of the judgment, registers the MAC address supplied from the number extracting section 491-1 in the slave station table 43-1, and registers the registered MAC address. The slave management unit 43-1: performs delay measurement with the slave having the MAC address.

In the slave station table 41-1, information on the slave stations 39A-1 to 39N-1 connected to the master station 37-1 is registered. In particular, the slave station table 41-1 indicates that each slave station 39 A-1 to 39 N-1 has a management number, a MAC address which is a number unique to the slave station, and furthermore, a number corresponding to the contract bandwidth. Uplink time slots (not shown) are registered.

The slave station management unit 43-1 manages the state of the slave station table 41-1. In particular, the slave station management unit 43-1 refers to the slave station table 41_1 in accordance with the instruction of the registration judgment unit 47-1, and determines the management number and MAC address of the slave station to be newly registered by the slave station. I に to 1-1. Further, after the i-port processing, the slave station management unit 43-1 supplies the MAC address of the slave station newly registered in the slave station table 41-1 to the slot assignment unit 45-1.

Further, according to the calculation of the delay time by the delay measuring section 57-1, the slave station management section 43_1 performs communication with the newly connected slave station for actually communicating with the master station 37-1. Allocate a slot for the user band. This slot for the user band is a time slot in the user band of the uplink frame (slots U # 1 to U # 32 shown in Fig. 3).

The slot instructing section 51-1 is used as a band in which the transmission of a registration request is permitted to a slave station which is to newly connect to the master station 37-1, and a ranging response area of an upstream frame (see Fig. 3). At a predetermined time slot. In particular, the slot indicator 51-1 is a slot in the ranging response area of the uplink frame that is not used for delay measurement with other slave stations (hereinafter, an empty slot). The number is referred to the slot allocation unit 45-1.

The slot allocator 45-1 supplies the slot number supplied from the slot indicator 51-1 to the control generator 61-1. Further, the slot allocating section 45-1 receives the MAC address supplied from the slave station management section 43-1, and allocates a slot for ranging response to a newly registered slave station. The slot for ranging response is located in the ranging response area of the uplink frame (slot R shown in Fig. 3).

# 1 to R # 3).

The delay measuring unit 57-1 measures a delay value with the slave station in a state where communication with the master station 37-1 is impossible. In particular, the delay measuring section 57-1 determines the master station 37-1 from the time when a MAC address that matches the MAC address supplied from the slot allocating section 45-1 is supplied from the bucket extracting section 55-1. — Measure the time difference until 1 reaches its reference phase as a delay value.

In the delay table 59-1, the management number of the slave station, the MAC address and the delay value are registered correspondingly. The delay value and the MAC address supplied from the delay measuring section 57-1 are registered in the delay table 59-1 and supplied to the control generating section 61-1.

The control generation unit 61-1 generates a control slot (see Fig. 4 (A)) for a downstream frame.

In particular, the control generation unit 61-1 generates a control slot including the empty slot. This vacant slot is, in the slot allocation area (see FIGS. 4 (B) and 4 (C)) in the control slot of the downlink frame, a slot instructing section 51-1 through a slot allocating section 45-1. It is transmitted in the time slot corresponding to the empty slot number supplied from. This control slot notifies the slave station requesting a new connection of permission to transmit the above-mentioned registration request as an empty slot (see Fig. 5).

Further, the control generation unit 61-1 generates a control slot for transmitting the MAC address supplied from the slot allocation unit 45-1. This MAC address corresponds to the ranging response slot supplied from the slot allocation section 45-1 in the slot allocation area in the control slot of the downlink frame. Is transmitted in a time slot. This control slot notifies the slave station having the MAC address supplied from the slot allocator 45-1 of an instruction for delay measurement (see FIG. 5).

Further, the control generation section 61-1 generates a control slot for transmitting the MAC address and the delay value supplied from the delay measurement section 57-1. The MAC address and the delay value are transmitted in the slot of the delay indication area (see FIGS. 4 (B) and 4 (D)) in the control slot of the downstream frame. This control slot informs the slave station having the MAC address supplied from the delay measuring section 57 _ 1 of the result of the delay measurement (see FIG. 5).

Further, the control generation unit 61-1 generates a control slot for transmitting the MAC address supplied from the slave station management unit 43-1. This MAC address is a time slot corresponding to the user band slot supplied from the slave station management unit 431-1 through the slot allocation unit 451-1 in the slot allocation area in the control slot of the downlink frame. Sent out. This control slot notifies the slave station, which has been notified of the delay measurement result, of the allocation of the user bandwidth for normal communication (see Fig. 5).

The multiplexing unit 63-1 multiplexes each control slot supplied from the control generation unit 61-1 with a downlink data packet. The transmitting unit 65-1 modulates the downlink frame supplied from the multiplexing unit 63-1 and broadcasts it to each of the slave stations 39 A-1 to 39 N-1.

Next, the configuration of the slave station will be described. Since the configurations of the slaves 39 A-1 to 39 N_1 are the same, the configuration of the slave 39 A-1 is exemplified here.

The slave station 39A-1 is a receiving section 67-1, a control demultiplexing section 69-1, a slot detecting section 73-1, a delay adjusting section 71-1, a delay packet section 79-1, and a multiplexing section. It is composed of 8 3 1 1 and transmitting section 8 5-1. Further, the slave station 39A-1 has an address section 75-1, a permission identifying section 77-1, and a registration packet section 81-1. The receiving unit 67-1 receives a downstream frame broadcast from the main station 37-1, demodulates the received downstream frame, and supplies the demodulated frame to the control separating unit 69-1. In particular, the receiving unit 67-1, the registration of transmission of the registration request, the instruction of the delay measurement, the delay As a result of the measurement, the downlink frame including the user bandwidth allocation is received (see FIG. 5). The control demultiplexing unit 699-1 converts the received downlink frame into a control slot and a user bandwidth slot (see FIG. 4 (A In addition, the control separation unit 69-1 separates the data of the separated control slot from the data of the slot allocation area and the data of the delay instruction area (see Fig. 4 (B)). Separate into

The slot detecting section 73-1 detects the MAC address of the station 39A-1 itself according to the data of the slot allocation area supplied from the control separating section 69-1. In particular, when a downlink frame including a delay measurement instruction is received, the slot detector 73-1 outputs the detected MAC address and the slot number to which the MAC address is supplied to the delay packet unit 73-1. Supply 9_1. Also, when the downlink frame including the allocation of the user band is received, the slot detector 73-1 supplies the slot number to which the detected MAC address is supplied to the delay adjuster 71-1. . The delay adjusting unit 71-1 is provided with a multiplexing unit based on the delay value addressed to the slave 39A-1 included in the data of the delay instruction area supplied from the control demultiplexing unit 69-1. 8 Adjust the processing in 3-1. In particular, when the downlink frame including the result of the delay measurement is received, the delay adjusting unit 71-1 detects the MAC address of the slave station 39A-1 itself included in the data of the delay instruction area. . Further, the delay adjusting unit 71-1 detects a delay value supplied corresponding to the detected MAC address, and performs processing of the multiplexing unit 83-1 based on the detected delay value. adjust.

The delay adjusting unit 71-1 is supplied with the delay value to be corrected for the main station 37-1 when the downlink frame is received. In addition, during normal communication, the delay adjustment unit 71-1 based on the delay value to be corrected and the slot number (user band slot) supplied from the slot detection unit 73-1. Then, the processing by the multiplexing unit 83-1 is adjusted. ·

The delay packet unit 79-1, in response to the instruction of the slot detection unit 73-1, creates a ranging response packet for measuring the delay. In particular, the delay packet section 791-1 sends a ranging response packet for sending its own MAC address to the slave station 39A-1. Create a set. This MAC address is transmitted in the time slot corresponding to the slot number supplied from the slot detector 73-1, in the ranging response area of the uplink frame.

The permission identification unit 77-1 identifies whether or not the slot allocation area supplied from the control separation unit 69-1 via the slot detection unit 73-1 includes a free slot. In particular, when detecting the empty slot, the permission identifying unit 77-1 detects the number of the empty slot and the MAC address of the slave station 398.1 stored in the address unit 75-1. Supplied to the registered bucket section 8 1—1.

As described above, this empty slot is a time slot that is not currently used for measuring the delay time between the master station 37_1 and another slave station. In the present embodiment, the slave station 39A-1 uses this empty slot when newly connecting, and when delay measurement has not yet been performed with the master station 37-1. Request registration to master station 37-1.

The registration packet section 81-1 generates a registration request bucket in response to the identification result of the permission identification section 77-1. In particular, the registration packet section 81-1 creates a registration request bucket for sending the slave 39A-1's own MAC address. This MAC address is transmitted in a time slot corresponding to the number of the empty slot supplied from the permission identification unit 77_1 in the ranging response area of the uplink frame.

The multiplexing unit 83-1 supplies the ranging response bucket supplied from the delay packet unit 79-1, the registration request packet supplied from the registration bucket unit 81-1 to the transmitting unit 85-1, and In a state where the slave station 39A-1 is operated, the uplink packet is multiplexed and supplied to the transmission unit 85-1. The transmitting section 85-1 modulates the data supplied from the multiplexing section 83-1, and transmits the modulated data to the master station 37-1.

Next, before describing the operation of the PON system according to the present embodiment, the concept of the present invention will be briefly described with reference to FIG. 3 and FIG.

FIG. 3 is a diagram illustrating the format of an upstream frame used throughout the embodiment of the present invention. First, slots R # 1 to R # 3 are time slots of the ranging response area used for delay measurement. By using these slots, slave stations 39 A-1 to 39 N-1 can be used to send delay measurement instructions from master station 37-1. Respond to the request.

Next, slots U # 1 to U # 32 are time slots for user bands. In this example, it is shown that 32 slave stations can be connected to the master station 37_1. Of these slots, the actual communication between the slave stations 39 A-1 to 39 N-1 and the master station 37-1, using the slots individually assigned by the master station 37-1, is performed. Is done.

FIGS. 4A to 4D are diagrams exemplifying the format and details of a downlink frame used throughout the embodiment of the present invention.

FIG. 4A shows an example of a downstream frame. This downlink frame consists of a control slot (4610 bits) and a slot for user band (536490 bits).

FIG. 4B illustrates details of the control slot. This control slot includes start delimiter (DL-s, 10 bits), end delimiter (DL-e, 10 bits), identification pattern (40 bits), HEC (10 bits), slot allocation area (1980 bits) andぴ Delay indication area (2560 bits)

FIG. 4 (C) illustrates details of the slot allocation area. This slot allocation area consists of slots R # l-3 (60 bits) and slots U # 1 to U # 32 (60 bits each). Slots R # 1-3 correspond to slots R # 1 to R # 3 (see Fig. 3) of the ranging response area in the uplink frame, respectively. Further, slots U # 1 to U # 32 correspond to slots U # 1 to U # 32 for the user band in the uplink frame, respectively.

FIG. 4D illustrates details of the delay indication area. This delay indication area is provided only in the area corresponding to 32 slave stations in which the pair of slot # 1 (60 bits) to which the MAC address is supplied and slot # 1 (60 bits) to which the corresponding delay value is supplied. Have been. That is, individual delay values are supplied to each of the 32 slave stations connected to one master station when a downstream frame is received, and delay correction is performed each time.

Referring to FIG. 3 and FIG. 4, in the present embodiment, master station 37-1 provides a downlink frame control slot slot to a slave station that has not yet been able to communicate. Conventional delay measurement is performed using the data allocation area (see Fig. 4 (B) and Fig. 4 (C)). While performing this delay measurement, the master station 37-1 sends to the slave station newly requesting registration to the master station 37-1 an empty slot not used for delay measurement in the slot allocation area. And notify the slave station of permission to send a registration request.

FIG. 5 is a diagram illustrating the operation of the PON system according to the present embodiment. In this figure, data exchange between the master station 37-1 and the slave station 39 A-1 newly connected to the master station 37-1 is illustrated. Hereinafter, the operation according to the present embodiment will be described corresponding to the configuration of the PON system shown in FIG.

First, the slave station 39A-1 is powered on. In response to this input, the receiving unit 67-1 of the slave station 39-1 becomes ready to receive the downstream frame broadcasted from the master station 37-1.

Next, in step 501, a downstream frame including permission to transmit a registration request is broadcast from the master station 37-1 to each of the slave stations 39A-1 to 39N-1. In this case, the slot indicator 51-1 of the master station 37-1 is a vacant slot not used for delay measurement in the ranging response area of the uplink frame (for example, the slot R shown in FIG. 3). # 1) is specified.

Next, the control generation unit 61_1 generates a control slot for transmitting the empty slot in order to notify the permission of transmission of the registration request. This empty slot is used as the time slot corresponding to the supplied slot number (in this case, slot R # 1 shown in FIG. ). The control packet is multiplexed with the downlink packet data by the multiplexing unit 63-1, is broadcast from the transmitting unit 65_1, and is received by the slave station 39A-1.

Next, in step 502, an upstream frame including a registration request bucket is transmitted from the slave station 39A-1 to the master station 37-1. Here, the permission identification section 77-1 of the slave station 39 A-1 includes an empty slot in the slot allocation area supplied from the control separation section 69-1 via the slot detection section 73-1. Identify Further, when the permission identification unit 77-1 detects the empty slot, The slot number and the MAC address supplied from the address section 75-1 are supplied to the registration packet section 81-1.

The registration bucket section 81-1 generates a registration request packet for transmitting the MAC address supplied from the permission identification section 77-1. This MAC address is a time slot (in this case, slot R # 1 shown in FIG. 3) corresponding to the slot number supplied from the permission identification unit 77-1 in the ranging response area of the uplink frame. ). The registration request packet is multiplexed with the uplink packet data by the multiplexing unit 83-1 and transmitted from the transmitting unit 85-1 to be received by the main station 37-1. Next, in step 503, a downlink frame including a delay measurement instruction is broadcast from the master station 37_1 to each of the slave stations 39A-1 to 39N-1. Here, the number extracting section 49-1 of the main station 37-1 extracts the MAC address included in the data of the ranging response area supplied from the bucket extracting section 55-1 and extracts the extracted MAC address. The address is sequentially supplied to the registration judgment section 47-1.

The registration determining unit 47_1 determines whether or not the MAC address supplied from the number extracting unit 49-1 exists in the slave station table 41-1. When determining that the MAC address supplied from the number extracting unit 49-1 is present in the slave station table 41-1, the registration determining unit 47_1 registers the slave station having the MAC address in the slave station table 41-1. To be supplied to the slave management unit 43-1.

In addition, the registration determination unit 47-1 supplies the MAC address of the slave station newly registered in the master station 37_1 to the slot assignment unit 45-1 via the slave station management unit 43-1. The slot allocating section 45-1 allocates a time slot (for example, slot R # 1 shown in FIG. 3) in the ranging response area of the uplink frame to the slave station 39A-1, and is supplied from the slave station managing section 43-1. It is supplied to the control generator 61-1 together with the MAC address.

The control generator 61-1 generates a control slot for transmitting the MAC address supplied from the slot allocator 45-1 in order to notify a delay measurement instruction. This MAC address is the time slot corresponding to the slot number supplied from the slot allocating section 45-1 (the slot R # 1 shown in FIG. ). This The control slot is multiplexed with downlink packet data by the multiplexing section 63-1, and is broadcast from the transmitting section 65-1 to each of the slave stations 39A-1 to 39N_l.

Next, in step 504, the upstream frame including the ranging response packet is transmitted from the slave station 39A-1 to the master station 37-1. Here, the slave station 3 9A—the first slot detection section 73-1—is the slave station 3 out of the MAC addresses included in the control slot supplied from the controller separation section 69-1. 9 A-1 Detects its own MAC address and the slot number to which the MAC address is supplied. The delay bucket section 79-1 generates a ranging response packet for transmitting the MAC address supplied from the slot detecting section 73-1. This MAC address is transmitted in the time slot (in this case, slot R # l shown in Fig. 3) corresponding to the slot number supplied from the slot detector 73-1, in the ranging response area of the uplink frame. Is done. This ranging response packet is transmitted from the transmitting section 85_1 via the multiplexing section 83_1 without delay insertion, and received by the main station 37_1. Here, since the slave station 39A-1 is not yet in the operation state, the transmission of the uplink bucket data is stopped by the multiplexing unit 83-1.

Next, in step 505, a downstream frame including the result of the delay measurement is broadcast from the master station 37-1 to each of the slave stations 39A-1 to 39N-1. Here, the delay measuring unit 57-1 of the main station 37-1 receives the MAC address that matches the MAC address supplied from the slot allocating unit 45 _ 1 from the packet extracting unit 55-1. The time difference from the time until the master station 37_1 reaches the reference phase ii-f is measured as a delay value. Further, the delay measuring section 57-1 registers the measured delay value and the MAC address in the delay table 59-1 and supplies the delay value and the MAC address to the control generating section 61-1.

The control generation unit 61-1 generates a control slot for transmitting the MAC address and the delay value supplied from the delay measurement unit 57-1, in order to notify the result of the delay measurement. The MAC address and the delay value are set in the time slot corresponding to the management number of the slave station in which the slave station to be notified is registered in the delay indication area of the control slot of the downlink frame (for example, slave station 39A— 1 is slave tape If it is registered in the management number 1 of the rule 411, it is sent out with # 1 MAC and # 1 delay value shown in Fig. 4 (D). The control slot is multiplexed with downlink packet data by the multiplexing section 63-1, and is broadcast from the transmitting section 65-1 to each of the slave stations 39A-1 to 39N-1.

The delay adjuster 71-1 of the slave 3 9 A-1 is the slave adjuster 39-1-1 of the MAC addresses included in the delay adjust area supplied from the control separator 6 9-1. And the delay value corresponding to the MAC address. Further, delay adjusting section 71_1_1 adjusts the processing of multiplexing section 83_1 based on the detected delay value.

Next, in step 506, a downstream frame including the allocation of the user band is broadcast from the master station 37-1 to each of the slave stations 39A-1 to 39N-1. Here, in response to the measurement of the delay measurement unit 57-1, the slave station management unit 43-1 of the master station 37-1, newly registered in the user frame of the uplink frame (see FIG. 3). A time slot (eg, slot U # 1 shown in FIG. 3) for performing normal communication with the slave station 39A-11 is allocated. Further, the slave station management unit 43-1 controls the assigned slot number and the MAC address of the slave station 39A-1, including reflecting the assignment result in the slave station table 41-1. It is supplied to the generator 6 1—1. The control generation unit 61-1 generates a control slot for transmitting the MAC address of the slave 39A-1 to notify the user band allocation. This MAC address is the time slot (in this case, the slot shown in Fig. 4 (C)) corresponding to the slot number supplied from the slave station management unit 43-1, in the slot allocation area in the control slot of the downlink frame. U # 1). This control slot is multiplexed with downlink packet data by the multiplexing section 63_1, and is broadcast from the transmitting section 65-1 to each of the slave stations 39A-1 to 39N-1.

The slot detector 7 3-1 of the slave 39 A-1 is configured to transmit the MAC of the slave 39 A-1 itself among the MAC addresses included in the slot allocation area supplied from the control separator 69-1. The address is detected, and the number of the slot to which the MAC address is supplied is supplied to the delay adjusting unit 71-1. Finally, in step S507, actual communication is performed. Here, the delay adjuster 71-1 of the slave station 39 A-11 receives the time slot for the user band supplied from the slot detector 73-1 in step 506 and the downstream frame. Each time, the processing of the multiplexing unit 83-1 is adjusted based on the delay value supplied from the control separating unit 69-1.

FIG. 6 is a block diagram showing a PON system according to the second embodiment of the present invention. In the PON system according to this embodiment, in addition to the components of the PON system according to the first embodiment (see FIG. 2), the slave station 39A-2 further includes a packet stop unit 87-2. Is provided.

In response to receiving the delay measurement instruction (see FIG. 5), the packet stopping unit 87-2 supplies an instruction to stop the transmission of the registration request bucket to the registration bucket unit 81-2. In particular, the packet stop unit 87-2 responds to the MAC address of the slave station 39A-2 supplied from the slot extraction unit 73-2 when receiving the instruction for delay measurement, The station 37-2 determines that the registration request has been accepted, and instructs the registration packet unit 81-2 to stop transmitting the registration request packet.

In the present embodiment, attention is paid to the point that delay measurement is performed after the slave station 39A-2 is registered in the slave station table 41-2, and the slot measurement unit 73-2 detects a delay measurement instruction. Until the registration request packet is transmitted, the registration request packet is continuously transmitted to the master station 37_2. As a result, after confirming the reception of the registration request packet on the master station side, the transmission of the registration request can be stopped efficiently.

Next, before describing the PON systems according to the third and fourth embodiments of the present invention, reference will be made to FIGS. 7 and 8 in relation to collision of registration request packets transmitted from each slave station. Will be explained.

FIG. 7 is a diagram illustrating a mechanism in which registration request packets collide when the PON system is operated without performing delay adjustment.

Before each slave station is registered with the master station, the transmission timing is not controlled based on the result of the delay measurement from the master station. For this reason, the timing at which the registration request packet is transmitted with respect to the reference phase of the master station depends on the difference in connection distance. Without adjusting the delay based on this difference in connection distance, the time slot specified by the master When a registration request bucket is transmitted in a packet, a registration request packet may collide due to a phase shift between slave stations due to the difference in the connection distance.

In the example of FIG. 7, the time slot allocation of each slave station is shown. For example, slave station # 1 is assigned to time slot T S # 1, slave station # 2 is assigned to time slot T S # 2, and slave station # 1 is assigned to time slot T S # 3. When delay adjustment is not performed as described above, the registration request packet transmitted from slave station # 1 in time slot TS # 3 and the registration request packet transmitted from slave station # 2 in time slot TS # 2 are transmitted to the master station. Collised by the side.

Here, a simplified model with a master station and two slave stations # 1 and # 2 is shown. In the delay measurement described above (steps S503 to S504 shown in FIG. 5), before the slave stations # 1 and # 2 are operated, the master station transmits a packet including the delay measurement instruction. Then, a phase difference corresponding to an assumed reception phase is measured as a delay value based on a response from the slave station to the instruction.

The measured phase differences are reported to slave stations # 1 and # 2 as delay adjustment values A and B, respectively. In the slave stations # 1 and # 2, the transmission timing is controlled based on the notified delay adjustment value. As a result, on the master station side, collision of packets in normal communication is avoided.

In the third and fourth embodiments described below, when the slave stations having the same function simultaneously transmit registration request packets under the same conditions, the master station transmits the registration request packets at the same timing from the reference phase. Addresses the possibility that the registration request bucket will collide. As a countermeasure, the timing of transmitting the registration request packet is controlled at random.

In particular, as a first viewpoint, attention is paid to the phase axis on the master station side shown in FIG. That is, attention is paid to the phase in one uplink frame received by the master station, and the transmission timing of registration request packets from different slave stations is determined by, for example, the delay adjustments A and B shown in FIG. As such, it is intentionally shifted to avoid collisions at the master station. This concept corresponds to a third embodiment described later.

As a second point of view, each slave station side downloads a downlink request including permission to transmit a registration request. It is noted that the frames are received repeatedly. For example, a registration request bucket to be transmitted in response to permission to send a registration request received this time is transmitted as a registration request bucket to be transmitted in response to permission to send a registration request to be received next time. This corresponds to a fourth embodiment described later.

FIG. 9 is a block diagram showing a PON system according to the third embodiment of the present invention. In the PON system according to the present embodiment, in addition to the components of the PON system according to the second embodiment (see FIG. 6), the slave station 39A-3 is provided with a random number generator 893-1. Have been.

The random number generation section 89-3 generates a random number for specifying the transmission timing of the registration request bucket in one uplink frame. In particular, the random number generator 89-3 is a random number for randomly controlling the timing at which the slave station 3 9A-3 transmits a registration request packet in the time slots R # 1 to R # 3 (see Fig. 3). Occurs.

The delay adjusting unit 71-3 controls the transmission timing of the registration request bucket based on the random number supplied from the random number generating unit 89-3. In particular, the delay adjuster 71-3 uses the value of the random number supplied from the random number generator 89-3 as the waiting time (for example, the number of bits) in the slot in the ranging response area of the upstream frame. The waiting time is defined as the time to wait for the transmission timing of the registration request bucket normally transmitted without waiting in the slot of the ranging response area of the uplink frame by, for example, 64 bits or 128 bits. Further, the delay adjuster 7 1-3 indicates the transmission timing of the registration request bucket by counting the number of bits at the uplink transmission rate based on the waiting time. The delay adjusting unit 71-3 supplies the multiplexing unit 83-3-3 with a delay value at the timing of transmitting the registration request bucket based on the random number supplied from the random number generating unit 89-3. The multiplexing unit 83-3 supplies the registration request bucket to the transmitting unit 85-3 based on the delay value supplied from the delay adjusting unit 71-3.

In the PON system according to the present embodiment, collision of registration request packets generated on the master station side is avoided because a plurality of slave stations transmit registration request buckets under the same conditions and at the same timing from the reference phase of the master station. Is done. This is the transmission time of the registration request packet. This is due to the fact that a random delay is introduced into the timing and the connection distance between the master station and each slave station is changed in a pseudo manner.

For example, on the slave station 3 9A-3 side, the random number generation unit 8 9— is defined as the amount by which the time slot for transmitting the registration request packet is delayed within R # 1 to R # 3 of one upstream frame. By using the random number supplied from 3, the registration request bucket can be transmitted intermittently.

FIG. 10 is a block diagram showing a PON system according to a fourth embodiment of the present invention. In the PON system according to the present embodiment, in addition to the components of the PON system according to the second embodiment (see FIG. 6), the slave station 39A-4 has a random number generation unit 89-4 and a queuing unit. The control unit 9 1 1 4 is provided.

The random number generator 89_4 generates a random number for defining the transmission timing of the registration request packet over a plurality of uplink frames. In particular, the random number generation unit 89-4 generates a random number for randomly controlling the upstream frame from which the slave 39A-4 sends out the registration request packet.

According to the specification of the transmission timing by the random number, for example, when it is assumed that the registration request contention occurs among the five slave stations, of the five downlink frames including the permission to transmit the registration request, The slave station transmits a registration request bucket in response to the reception of the last downlink frame, and the second slave station transmits a registration request packet S in response to the reception of the third downlink frame.

The queuing controller 91-4 controls the transmission timing of the registration request packet based on the random number supplied from the random number generator 89-9_4. In particular, the queuing control unit 91-4 receives the random number value supplied from the random number generating unit 89-4 in the slot allocation area of the downstream frame (see FIG. 4 (B)). Is used as the number of times to wait for a permitted time slot (empty slot).

Further, the queuing control unit 911-14 instructs the transmission timing of the registration request packet by counting the number of empty slots identified in the permission identification IJ unit 77-4 based on the number of queuing. . The permission identification unit 77-4 instructs the registration packet unit 81-4 to perform a registration request based on the transmission timing instruction supplied from the queuing control unit 91-4. In the PON system according to the present embodiment, collision of registration request packets generated on the master station side is avoided because a plurality of slave stations transmit the registration request bucket at the same timing and at the same timing from the reference phase of the master station. Is done. For example, the slave station 39A-4 uses the random number supplied from the random number generator 89-3 as the amount by which the time slot for transmitting the registration request packet is delayed over a plurality of uplink frames. The registration request packet can be transmitted intermittently.

FIG. 11 is a block diagram showing a PON system according to a fifth embodiment of the present invention. In the PON system according to the present embodiment, instead of the random number generator 89-3 of the PON system according to the third embodiment (see FIG. 9), the slave station 39A-5 generates a queue. Section 9 3-5 is provided.

The queuing generator 93-5 generates a waiting time unique to the slave 39A-5 with respect to the transmission timing of the registration request packet. In particular, the queuing generation unit 93-5 specifies the transmission timing of the registration request packet over a plurality of uplink frames using the MAC address of the slave 39A-5 supplied from the address unit 75-5. Generate the number of waits.

The queuing control unit 91-5 controls the transmission timing of the registration request packet based on the number of queuing supplied from the queuing generation unit 93-5. In particular, the queuing control unit 91_5 uses the number of queuing supplied from the queuing generating unit 93-5 as the number of timeslots (vacant slots) for which registration requests are permitted.

Further, the queuing control section 91-5 instructs the transmission timing of the registration request packet by counting the number of empty slots identified in the permission identifying section 77-5 based on the count number. The permission identification unit 77-5 instructs the registration bucket unit 81-5 based on the transmission timing instruction supplied from the queuing control unit 91-5.

FIG. 11 is a diagram exemplifying operations of the queuing generation unit 93-5 and the queuing control unit 91-15 of the PON system according to the fifth embodiment of the present invention.

The symbol R shown in the vertical direction in Fig. 11 indicates the delay measurement instruction (Fig. 5) to other slave stations in the slot allocation area of the control slot of the downstream frame (see Fig. 3). Is a supplied time slot, that is, a time slot in which the slave station 39A-5 cannot send a registration request packet. On the other hand, the symbol N is a time slot in which the slave station 39A-5 can send a registration request packet.

In the present embodiment, an example is shown in which the number of times of waiting is generated using the MAC address (= 020001 COFF 07) 16 of the slave station 39A-5. This MAC address is divided into "020001 COFF 07", and the transmission timing of the registration request bucket is controlled based on the number of waits corresponding to each of the divided values.

In particular, of these delimited values, for example, the least significant hexadecimal value "07" is converted to its reciprocal "8F" after the digits are inverted to "70" and further converted to decimal. Converted to produce the value "143". This value "143" corresponds to the number of times to count the symbol N described above. These counts are generated in the wait generation unit 93_5.

A specific example of transmission timing control will be described. First, in step S101, the power of the slave station 39A-5 is turned on to perform frame synchronization. Next, in step 102, the number of waits “143” supplied from the wait generation unit 93-5 is loaded into the wait control unit 91_5.

The permission identification unit 77-5 identifies an empty slot (symbol N) among the time slots of the slot allocation area supplied from the controller separation unit 69-5. The waiting control unit 91_5 counts down from the count number "143" according to the identification of the empty slot by the permission identifying unit 77-5.

When the countdown value becomes 0, the queuing control unit 91-5 instructs the permission identifying unit 77-5 to transmit a registration request packet. Specifically, the slot number to which the last empty slot is supplied and the MAC address supplied from the address section 75-5 are supplied to the registration bucket section 81-5.

Subsequent to step S104, the number of times of queuing “0” supplied from the queuing generation unit 93-5 is loaded into the queuing control unit 91-15. In response to the number of times of queuing "0", the queuing control unit 91-15 sends a registration request packet. To U-part 7 7-5. Similarly, in the subsequent processing, the values of the decimal numbers “243”, “239”, etc. corresponding to the remaining delimited hexadecimal values are counted down according to the identification of the empty slot. Each of the registration request packets is transmitted. In the above-described fourth embodiment, the random number generator is used, and the queuing of the registration request packet is made random between the slave stations. In the present embodiment, the possibility of collision of registration request packets on the master station is further increased by using a MAC address unique to the slave station and intentionally increasing the transmission timing deviation from other slave stations. It can be reduced.

As illustrated in FIG. 11, the MAC address has 6 bytes, and when this MAC address is used, the count number becomes too large, and the practicality is low. On the other hand, in the present embodiment, the MAC address is divided every two bytes, and particularly the lower group of these two bytes is close to a small number, that is, between other slave stations. It is assumed to be a number. In consideration of such a case, the above-described procedure for generating the count number is adopted.

Therefore, the queuing generation unit 93-5 and the queuing control unit 91_5 applied to the present embodiment are not limited to the processing of the above-described embodiment (see FIG. 12), Any form may be used as long as there is a difference in the transmission timing with other slave stations based on the value generated by utilizing.

In the PON systems according to the third to fifth embodiments described above, the communication using the user band (see FIG. 3) between the master station and the slave stations already registered in the master station uses a ranging response. Even if there is a collision of the registration request bucket included in the area, it is not affected at all. This is an advantage unique to the PON system because the registration request packet is transmitted in a time slot different from the user bandwidth, such as in the ranging response area. Therefore, it is possible to take the above-described countermeasures against the bucket collision with the newly connected slave station after securing the normal communication with the existing slave station with priority.

FIG. 13 is a block diagram showing a PON system according to the sixth embodiment of the present invention. In the PON system according to the present embodiment, the PO system according to the fifth embodiment In addition to the components of the N system (see Fig. 10), the master station 37-6 has a registration request storage unit 95-6.

The registration request storage unit 95_6 stores registration request pads supplied from each of the plurality of slave stations. In particular, the registration request storage unit 95-6 stores the data of the ranging response area (see Fig. 3) of the upstream frame supplied from the packet extraction unit 55-6.

The number extracting unit 496-16 sequentially extracts the MAC addresses included in the ranging response area supplied from the registration request storage unit 95_6 based on the instructions of the registration determining unit 47-6. And supplies it to the registration judging section 47-6.

For example, as shown in the fifth embodiment and the like, when collision of registration request packets transmitted from each of a plurality of slave stations is avoided on the master station side, a ranging response area including a plurality of registration request buckets Is supplied to the registration request storage unit 95 (for example, see FIG. 8).

According to the PON system according to the present embodiment, when a plurality of slave stations simultaneously transmit a registration request packet in the same time slot in which the registration request is permitted in the ranging response area of the uplink frame, the master station In the individual J, the registration request packets from each slave station are normally received without collision, and the registration request packets corresponding to the plurality of slave stations are stored in the registration request storage unit 95-6. As a result, the efficiency of the registration process is improved for one transmission of a downlink frame including permission to transmit a registration request.

FIG. 13 is a block diagram showing a PON system according to a seventh embodiment of the present invention. In the PON system according to the present embodiment, the constituent elements of the PON system according to the second embodiment (see FIG. 6) are replaced by slave stations 39A-7 instead of address sections 75-6. Is provided with a management number section 97-7.

In the present embodiment, first, the registration request packet does not include the MAC address but, for example, a slave station 39 A-7 to 39 N connected to the master station 37-7, such as a management number. — Only numbers between 7 are sent out. While the MAC address has a very long number of digits, this management number has a very small number of digits up to the number of slave stations connected to the master station (for example, about 32). By adopting this management number, when the registration request packet is received by the master station 37-7, the MAC address is Detection becomes much easier than the

Secondly, each slave station 39A-1 to 39N-1 is notified of the time slot in which the registration request packet is transmitted for each management number. In response to this, of the control slots (see FIGS. 4 (A) and 4 (B)) of the downstream frame broadcast from the master station 37-7, a management number ^ S area (not shown) different from the slot allocation area No) is used. The management number “^” area includes a different management number for each downlink frame. This management number is assigned when a slave station is installed on site, etc. A time slot in which transmission of a registration request is permitted By individually assigning to the slave stations, collision of the registration request packet on the master station side is avoided.

In the slave station table 41-7 of the master station 37-7, the management numbers of the slave stations connected to the master station 37-7 are registered. The slot designating section 51-7 designates a different management number of a slave station for each downlink frame. The control generation unit 61-7 generates a control slot for transmitting the management number supplied from the slot instruction unit 51-7 via the slot allocation unit 45-7. This management number is transmitted in the management number ^ g area of the control slot. This controller slot is multiplexed by the multiplexing unit 63-7 with the downlink packet data as permission for transmission of the registration request, and is broadcast from the transmitting unit 65-7.

The control separation section 69-9 of the slave station 39A-7 separates the control slot of the received downlink frame into a slot assignment area, a delay indication area, and a management number area. The permission identification section 7 7—7 includes the control number of the slave station 39 A—7 itself in the management number ^ S area supplied from the control separation section 69-9 through the slot detection section 73-3—7. Identify whether the force is on or off.

When the permission identification unit 7 7-7 recognizes the management number of the slave 39 A-7 itself according to the management number area, it registers the management number via the bucket stopping unit 8 7-7, and the registration bucket unit 8 1 — Supply 7

The registration packet section 81-7 generates a registration request packet for transmitting the management number supplied from the permission identification section 77-7. This management number is transmitted in the time slot corresponding to the management number supplied from the permission identification unit 77-7 in the user band of the upstream frame (see Fig. 3). This registration request packet passes through the multiplexing unit 83-3-7. And transmitted from the transmission unit 85-7.

The packet extraction unit 55-7 of the main station 37-7 does not match the management number supplied from the slot generation unit 45-7 among the management numbers included in each time slot of the user band. The bucket data including the management number is supplied to the number extracting unit 49-17. The number extracting unit 497-17 extracts the management number included in the bucket data supplied from the bucket extracting unit 55-7 based on the instruction from the registration judging unit 47-7, and registers and judges it. 4 7—Supply to 7.

The registration judging section 47-7 judges whether or not it is possible to register the slave station of the management number supplied from the number extracting section 49-7 in the slave station table 41-7. In particular, the registration judging section 47-7, through the reference processing of the slave station table 41-7 by the slave station managing section 43-7, stores the management number supplied from the number extracting section 49-7 in the slave station table 41. -Judge whether the force registered in 7 or not.

Further, the registration judging unit 47-7 determines that the management number supplied from the number extracting unit 49-7 is not registered in the slave station table 41-7. In response to the request, the instruction to register the management number in the slave station table 43-7 and the instruction to measure the delay with the slave station having the registered management number are issued.

The above description corresponds to the processing of steps S501 and S502 described in FIG. 5 of the first embodiment. Similarly, in the subsequent steps S503, S504 and S505, instead of the MAC address, the management number of the slave requesting new registration is used.

In this embodiment, the master station allocates a time slot for permitting transmission of a registration request packet for each management number, and the slave station transmits a registration request packet in a time slot that matches the assigned management number. Thereby, the registration request can be processed without the registration request packet from each slave station colliding on the master station side. In addition, by using the management number instead of the MAC address, processing relating to detection of a number unique to the slave station on the master station side is efficiently performed.

The PON systems according to the first to seventh embodiments according to the present invention have been described above. Here, another embodiment will be described based on the above-described embodiment.

First, in the first embodiment and the sixth embodiment described above, the registration request packet is An example in which a MAC address is transmitted is shown. As another mode, for example, as described in the seventh embodiment, a management number defined between a group including a master station and a plurality of slave stations connected to the master station may be used. In this case, the management number is transmitted from the slave station to the master station, for example, in a time slot of the ranging response area of the uplink frame allocated by the slot instructing units 51-1 to 6.

Next, in the above-described seventh embodiment, in addition to avoiding collision of registration request packets on the master station side, the management of the unique number on the master station side is also taken into consideration. An example is shown in which a registration request bucket including a physical number is transmitted. As another mode, for example, a registration request packet including a MAC address may be transmitted as in the first to sixth embodiments. In this case, the MAC address is transmitted from the slave station to the master station, for example, in the time slot of the user band designated by the slot designating section 51-7 in the control slot management number area.

Next, the above-described seventh embodiment is a form applied to the above-described second embodiment. As another mode, the concept of using the management number in the procedure until communication between the master station and the slave station is established (for example, see FIG. 5) is described in the third to sixth embodiments. The same can be applied to.

Next, in the above-described first to sixth embodiments, a configuration is adopted in which a band not used for delay measurement is indicated by the slot indicating units 51-1 to 6. As another form, for example, a time slot in which a registration request is permitted between a master station and a plurality of slave stations connected to the master station can be fixed. In this case, for example, the control generation units 61-1 to 6 and the transmission units 65 _ 1 to 6 notify each slave station of the time slot in which the transmission of the registration request is permitted.

Next, in the above-described first to seventh embodiments, as an example of a number unique to each slave station, the configuration is such that the MAC address or the management number is included in the registration request bucket. The present invention is not limited to numbers, but may have another configuration as long as the master station is connected to the master station and a unique identifier capable of identifying each of the plurality of slave stations is included in the registration request packet.

Lastly, in the above-described embodiment, for the sake of convenience of explanation, each of the subdivided functions is described. In another embodiment, for example, a plurality of components having similar functions Or a plurality of components provided to achieve the same purpose may be realized as one component.

For example, the delay bucket section 79-1 and the registration bucket section 81-1 shown in FIG. 2 may be realized as one component. Further, the slot detecting section 73-1 and the permission identifying section 77-1 may be realized as one component. Further, the slot instructing section 51-1 and the slot allocating section 45-1 may be realized as one component. Further, the registration determination unit 47-1 and the slave station management unit 43-1 may be realized as one component. Further, the random number generation unit 89-4 and the waiting control unit 91-14 shown in FIG. 10 may be realized as one component.

The correspondence between the claims and the embodiments, including the other embodiments described above, is illustrated. First, regarding the master station, the notification means described in the claims corresponds to the control generation units 61-1 to 7 and the transmission units 65-1 to 7-7. The receiving means corresponds to receiving section 53-1-7. The extracting means corresponds to the number extracting units 491-1 to 7. The registration means corresponds to the registration determination unit 47-1-7. The storage means corresponds to the registration request storage unit 95-6. The allocating means corresponds to the slot indicating sections 51-1 to 51-7.

Next, regarding the slave station, the receiving means described in the claims corresponds to the receiving units 67-1 to 67-7. The identification means corresponds to the permission identification sections 77_ to 77_7. The generating means corresponds to the registered packet units 81_1 to 7. The transmitting means corresponds to the transmitting means 85-1-7. The instruction means corresponds to the packet stopping units 87-2 to 7-7. The random number generator corresponds to the random number generators 89-3 and 89-4. The count generation means corresponds to the queuing generation unit 93-5. The timing control means corresponds to the delay adjustment unit 71-3, the queuing control units 91-4, 91-5, and 91-6.

Claims

The scope of the claims

1. A method for automatically registering slave stations in a PON system in which a plurality of slave stations are connected to a master station via a communication line, and wherein the master station manages information on identifiers unique to the plurality of slave stations,

The master station notifies the plurality of slave stations of a time slot in which transmission of a registration request to the self master station is permitted,

A slave station requesting registration from the master station, generating the registration request including an identifier unique to the slave station, transmitting the registration request to the master station in the notified time slot,

The IfilB master receives the registration request and lifts it based on a comparison between the unique identifier included in the received registration request and the mechanical identifier managed by the master, and Registering the unique identifier included in the registration request in the information of the unique identifier managed by the master station;

Ρ Ο 方法 Automatic registration of slave stations in the system.

2. The master station generates the downlink frame by setting a time slot for delay measurement of a downlink frame corresponding to the time slot of the uplink frame permitted to transmit a registration request to the master station to an empty slot. The method for automatically registering a slave station in the PON system according to claim 1, wherein the method is to transmit to the plurality of slave stations.

3. The time slot permitted to transmit the registration request is assigned to each of the plurality of slave stations.

3. The method for automatically registering slave stations in the PON system according to claim 1.

4. The method according to claim 1, wherein the unique identifier is a MAC (Media Access Control) address or a management identifier for managing a plurality of slave stations connected to the tfrt master station. Automatic registration method of slave stations in PON system.

5. A plurality of slave stations are connected to the master station via a communication line, and the master station is a master station in a PON system that manages information of identifiers unique to the slave stations. Notification means for notifying a time slot in which transmission of a registration request is permitted;

receiving means for receiving the registration request transmitted from the slave station in the tin time slot notified by the tffia notifying means,

Extracting means for extracting an identifier included in the registration request received by the receiving means;

The presence / absence of the i_ij element extracted by the extracting means is determined by referring to the information consisting of the identifier managed by the master station. Based on the determination result, the extracted identification is performed. Registration means for registering a child in information of a unique identifier managed by the master station. A master station in the P〇N system.

6. The notifying unit generates the downlink frame by setting a time slot for delay measurement of the downlink frame corresponding to the time slot of the uplink frame permitted to transmit the registration request to the master station to an empty slot. The master station in the PON system according to claim 5, wherein the master station transmits to the plurality of slave stations.

7. The PON system according to claim 5, further comprising a storage unit configured to store a plurality of registration requests supplied from each of the plurality of slave stations in the time slot in which transmission of the registration request is permitted. Master station.

8. Further comprising an allocating means for allocating a time slot permitted to transmit the registration request to each of the plurality of slave stations.

8. A master station in a PON system according to claim 5, wherein the slip force is one.

9. The unique identifier is a MAC (Media Access Control) address, a management identifier for defining a plurality of slave stations connected to the master station,

9. The master station in the PON system according to any one of claims 5 to 8, wherein:

10. A plurality of slave stations are connected to a master station via a communication line, and the master station is a slave station in a PON system that manages information of identifiers unique to the plurality of slave stations,

Receiving means for receiving a downlink frame notifying a time slot in which transmission of a registration request to the master station is permitted;

Identification means for identifying the time slot in which transmission of a registration request is permitted among downlink frames received by the cafeteria receiving means;

Generating means for generating a registration request packet including an identifier unique to the slave station; transmitting means for indicating the registration request bucket generated by the generating means in the time slot identified by the IJ means;

Slave station in PON system with

11. The slave station in the PON system according to claim 10, wherein said identification means identifies unused empty slots among time slots for delay measurement of the Bye-frame received by said reception means.

12. The PON system according to claim 11, further comprising an instruction unit that instructs the transmission unit to stop transmitting a registration request bucket in response to receiving the instruction of delay measurement by the ffflB reception unit. Slave station.

1 3. Random number generating means for generating random numbers,

And timing control means for controlling the transmission timing of the registration request packet in one uplink frame based on the random number generated by the random number generation means.

A slave station in the PON system according to claim 11.

1 4. random number generating means for generating random numbers,

Timing control means for controlling transmission timing of the registration request bucket over a plurality of upstream frames based on a random number generated by the random number generation means. Further prepare,

A slave station in the PON system according to claim 11.

15. Count generation means for generating a value for counting the empty slots using the MAC (Media Access Control) address of the slave station, and the registration based on the value generated from the fta count generation means. Timing control means for controlling the transmission timing of the request bucket over a plurality of upstream frames,

A slave station in the p ON system according to claim 11.

1 6. The time slot permitted to transmit the registration request is assigned to each of the plurality of slave stations.

A slave in the PON system according to any one of claims 10 to 15.

17. The unique identifier is a MAC (Media Access Control) address, a management identifier for defining a plurality of slave stations connected to the master station,

A slave in the PON system according to any one of claims 10 to 16.