KR100876087B1 - Broadband Transport Network Architecture Using Wavelength Bandwidth Allocation Method - Google Patents

Abstract

The present invention discloses a broadband transmission network structure using a wavelength band allocation method.

The broadband transmission network structure using the wavelength band allocation method according to the present invention adds a new wavelength band while maintaining the wavelength band of the existing WDM-PON and the infrastructure of the WDM-PON. Enable the transfer. In the present invention, a wavelength division multiplexer (WDM) filter which combines or separates an existing wavelength band and a newly added wavelength band is used to increase the transmission band in an economical manner.

Description

A Network Architecture for Broadband Transmission Using A Method of Assigning Wavelength Bands

1 is a diagram illustrating a first wavelength band allocation method for wideband transmission used in the present invention.

FIG. 2 is a diagram illustrating a first embodiment of a broadband transmission network structure of the present invention using the first wavelength band allocation method shown in FIG.

3 is a diagram illustrating a second embodiment of the broadband transmission network structure of the present invention using the first wavelength band allocation method shown in FIG.

FIG. 4 is a diagram illustrating a third embodiment of a broadband transmission network structure of the present invention using the first wavelength band allocation method shown in FIG. 1.

FIG. 5 is a diagram illustrating a fourth embodiment of a broadband transport network structure of the present invention using the first wavelength band allocation method shown in FIG. 1.

6 is a diagram illustrating a second wavelength band allocation method for wideband transmission used in the present invention.

FIG. 7 is a diagram illustrating a first embodiment of a broadband transmission network structure of the present invention using the second wavelength band allocation method shown in FIG.

FIG. 8 is a diagram illustrating a second embodiment of a broadband transmission network structure of the present invention using the second wavelength band allocation method shown in FIG.

The present invention relates to a broadband transmission network structure using a wavelength band allocation method for wideband transmission. More specifically, the present invention uses only an optical passive element that combines or separates a new wavelength band into an existing transmission area, thereby increasing the number of subscribers through the expansion of the transmission band while maintaining the infrastructure of the already used subscriber network. The present invention relates to a broadband transmission network structure using a wavelength band allocation method for transmission.

With the rapid spread of the Internet, the demand for speeding up subscriber networks is increasing rapidly as the existing voice and text oriented services are converted to video and video oriented services. Therefore, in order to provide integrated services of video, data, and voice through one network infrastructure, both telecommunication operators and cable television (CATV) operators are spurring their own subscriber networks. Subscribers receive 100 Mb to accommodate next-generation services such as high-definition television / Internet protocol television (HDTV / IP-TV), Video On Demand (VOD), and Education On Demand (EOD) that require high bandwidth. Wavelength Division Multiplexing Passive Optical Networks (WDM-PON), which can guarantee high quality of service (QoS) while providing bandwidths above / s, are recognized as the ultimate alternative.

When the wavelength division multiplexing technique is applied to a subscriber network, an optical signal obtained by using wavelength division multiplexing using multiple wavelengths can be transmitted regardless of a transmission method or speed, thereby efficiently speeding up and widening a subscriber network. As a method of extending an existing subscriber network, a method of adding a new wavelength band to a transmission region in addition to the wavelength band already used may be considered.

In order to increase the number of subscribers in the conventional subscriber network described above, a new WDM-PON must be additionally installed separately from the existing WDM-PON. In this case, since a new WDM-PON must be additionally installed, there is a problem that the installation cost increases.

Therefore, as a way to increase the number of subscribers in an economic way, a new broadband transmission network structure is required that extends the transmission band to a wavelength band other than the existing wavelength band while maintaining the current infrastructure.

The present invention is based on the existing subscriber network infrastructure including feeder fiber and arrayed waveguide grating (AWG) using only optical passive elements that combine or separate new wavelength bands into existing transmission areas. Wavelength for wideband transmission that enables subscribers and wideband transmission through the extension of the transmission band by using a WDM-filter that combines and separates the existing wavelength band and the additional wavelength band while maintaining the same. By providing a band allocation method and a structure of a broadband transmission network using the same, it is to solve the above problems of the prior art.

More specifically, according to the first aspect of the present invention, in the broadband transmission network structure using the wavelength band allocation method, the existing wavelength division multiplexing passive optical subscriber network (WDM-PON) is an optical termination device (OLT) A plurality of first group transmitters (Tx) and W-bands for transmitting downlink signals of the V-bands, using V-bands and W-bands as transmission bands within the existing A-bands A plurality of first group receivers (Rx) for receiving an uplink signal of a plurality, and a plurality of first group wavelength division multiplexer (WDM) filters for separating optical signals in the V-band and the W-band First group transceivers (TRx); A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal of the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal of the W-band, and the V-band and the W A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And a plurality of first group distribution optical fibers respectively connecting the plurality of first group ONTs to the periodic second AWG, wherein the additionally installed WDM-PON comprises the periodic within the OLT. Located at the rear end of the first AWG and connected to the periodic first AWG and the first group transceiver (TRx), respectively, at least one of combining or separating the A-band and the B-band for transmission band extension. Third group WDM filter; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group WDM filter, for transmitting downlink signals of the X-band in the B-band, and the B-band At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band in the at least one and at least one fourth group WDM filter for separating the optical signals of the X-band and the Y-band One fourth group transceiver TRx; At least one end of the periodic second AWG in the RN and coupled to the periodic second AWG and the first group ONT, respectively, for combining or separating the A-band and the B-band; A fifth group WDM filter; At least one sixth group receiver (Rx) for receiving the downlink signal of the X-band in the B-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating optical signals in the X-band and the Y-band; And at least one second group distribution optical fiber connecting the at least one fifth group WDM filter and the at least one second group ONT, respectively.

According to a second aspect of the present invention, in the network structure for wideband transmission using a wavelength band allocation method, a conventional wavelength division multiplexing passive optical subscriber network (WDM-PON) is an optical termination device (OLT). A plurality of first group transmitters (Tx) for transmitting downlink signals of the V-band, using the V-band and the W-band as transmission bands in the existing A-band; A plurality of first group receivers (Rx) for receiving an uplink signal, and a plurality of first group wavelength division multiplexer (WDM) filters for separating optical signals in the V-band and the W-band A first group transceiver (TRx); A first waveguide array grating (AWG), located in the optical termination device (OLT), for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second AWG located in a remote node, the second AWG for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) connected between the first AWG and the second AWG and transmitting an optical signal multiplexed by the first AWG and the second AWG; And a plurality of first group distribution optical fibers respectively connected to the second AWG, the plurality of second group receivers Rx for receiving the downlink signal of the V-band, and the upstream of the W-band. A plurality of first group subscribers (ONT) comprising a plurality of second group transmitters (Tx) for transmitting signals and a plurality of second group WDM filters for separating optical signals in the V-band and the W-band Optical network termination, and additionally installed WDM-PON is located on the OLT side, and combines or separates the A-band and the B-band for transmission band extension between the first AWG and the SMF. A third WDM filter; A fourth WDM filter positioned at the RN side and combining or separating the A-band and the B-band between the second AWG and the SMF; A plurality of fifth group transmitters (Tx), located in the OLT, for transmitting downlink signals in the X-band in the B-band, and a plurality of fifth for receiving uplink signals in the Y-band in the B-band; A plurality of fifth group transceivers (TRx) comprising a group receiver (Rx) and a plurality of fifth group WDM filters for separating optical signals in the X-band and the Y-band; A third AWG located within the OLT, connected to the third WDM filter, and connected to each of the fifth group WDM filters, for wavelength division multiplexing or demultiplexing a plurality of optical signals; Located at the first group ONT side, a plurality of sixth group receiver (Rx) for receiving the downlink signal of the X-band, a plurality of sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band And a plurality of second group ONTs composed of a plurality of sixth group WDM filters for separating optical signals in the X-band and the Y-band; And located in the RN, connected to the fourth WDM filter, connected to each of the sixth group WDM filters by a plurality of second group split optical fibers, and configured to perform wavelength division multiplexing or demultiplexing of a plurality of optical signals. It is to provide a network structure for broadband transmission including 4 AWG.

According to a third aspect of the present invention, in the network structure for wideband transmission using a wavelength band allocation method, a conventional wavelength division multiplexing passive optical subscriber network (WDM-PON) is provided in an optical termination device (OLT). A plurality of first group transmitters (Tx) for transmitting downlink signals of the V-bands, using the V-bands and the W-bands as transmission bands within the existing A-bands; A plurality of first group receivers (Rx) for receiving signals and a plurality of first group wavelength division multiplexer (WDM) filters for separating optical signals in the V-band and the W-band; 1 group transceiver (TRx); A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal of the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal of the W-band, and the V-band and the W A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And a plurality of first group distribution optical fibers respectively connecting the periodic second AWG and the plurality of first group ONTs, wherein the additionally installed WDM-PON comprises the periodic in the OLT. Located at the rear end of the first AWG and connected to the periodic first AWG and the first group transceiver (TRx), respectively, at least one of combining or separating the A-band and the B-band for transmission band extension. Third group WDM filter; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group WDM filter, for transmitting downlink signals of the X-band in the B-band, and the B-band At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band within the at least one fourth group WDM filter for separating optical signals of the X-band and the Y-band. At least one fourth group transceiver (TRx); Located at the rear end of the periodic second AWG in the RN and coupled to the periodic second AWG and the first group ONT, respectively, or combine or separate the A-band and the B-band for transmission band extension; At least one fifth group WDM filter; At least one sixth group receiver (Rx) for receiving the downlink signal of the X-band in the B-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating optical signals in the X-band and the Y-band; At least one second group distribution optical fiber connecting the at least one fifth group WDM filter and the at least one second group ONT, respectively; A seventh WDM filter located within the OLT and connected to the periodic first AWG; An eighth WDM filter located within the OLT and connected to the SMF; A wavelength-locked first light source positioned in the OLT and for injecting into the down-signal light source of the V-band and the up-signal light source of the W-band; And a second light source for wavelength locking positioned in the OLT and for injecting into the down signal light source of the X-band and the up signal light source of the Y-band, wherein the first light source for wavelength locking is a V-band broadband ratio. Coherent light source (V BLS); W-band BLS (W BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the W-band BLS; And ninth and tenth WDM filters connected in parallel with the first circulator and the second circulator, wherein the ninth WDM filter is connected to the seventh WDM filter, and the tenth WDM filter is A second light source for wavelength immersion, the second light source being locked to an eighth WDM filter; Y-band BLS (Y BLS); A third circulator coupled to the X-band BLS; A fourth circulator connected to the Y-band BLS; And eleventh and twelfth WDM filters connected in parallel with the third and fourth circulators, wherein the eleventh WDM filter is connected to the seventh WDM filter, and the twelfth WDM filter is It is to provide a network structure for broadband transmission connected to an eighth WDM filter.

According to a fourth aspect of the present invention, the present invention provides a network structure for broadband transmission using a wavelength band allocation method, wherein a conventional wavelength division multiplexing passive optical subscriber network (WDM-PON) is provided in an optical termination device (OLT). A plurality of first group transmitters (Tx) for transmitting downlink signals of the V-bands, using the V-bands and the W-bands as transmission bands within the existing A-bands; A plurality of first group receivers (Rx) for receiving signals and a plurality of first group wavelength division multiplexer (WDM) filters for separating optical signals in the V-band and the W-band; 1 group transceiver (TRx); A first waveguide array grating (AWG), located in the optical termination device (OLT), for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second AWG located in a remote node, the second AWG for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) connected between the first AWG and the second AWG and transmitting an optical signal multiplexed by the first AWG and the second AWG; And a plurality of first group distribution optical fibers respectively connected to the second AWG, the plurality of second group receivers Rx for receiving the downlink signal of the V-band, and the upstream of the W-band. A plurality of first group subscribers (ONT) comprising a plurality of second group transmitters (Tx) for transmitting signals and a plurality of second group WDM filters for separating optical signals in the V-band and the W-band Optical network termination, and additionally installed WDM-PON is located on the OLT side, and combines or separates the A-band and the B-band for transmission band extension between the first AWG and the SMF. A third WDM filter; A fourth WDM filter positioned at the RN side and combining or separating the A-band and the B-band between the second AWG and the SMF; A plurality of fifth group transmitters (Tx), located in the OLT, for transmitting downlink signals in the X-band in the B-band, and a plurality of fifth for receiving uplink signals in the Y-band in the B-band; A plurality of fifth group transceivers (TRx) comprising a group receiver (Rx) and a plurality of fifth group WDM filters for separating optical signals in the X-band and the Y-band; A third AWG located within the OLT and coupled to each of the fifth group WDM filters, for wavelength division multiplexing or demultiplexing a plurality of optical signals; Located at the first group ONT side, a plurality of sixth group receiver (Rx) for receiving the downlink signal of the X-band, a plurality of sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band And a plurality of second group ONTs composed of a plurality of sixth group WDM filters for separating optical signals in the X-band and the Y-band; A fourth portion located in the RN, connected to the fourth WDM filter, connected to each of the sixth group WDM filters by a plurality of second group split optical fibers, and configured to perform wavelength division multiplexing or demultiplexing of the plurality of optical signals; AWG; A wavelength-locked first light source positioned in the OLT and for injecting into the down-signal light source of the V-band and the up-signal light source of the W-band; And a second light source for wavelength locking positioned in the OLT and for injecting into the down signal light source of the X-band and the up signal light source of the Y-band, wherein the first light source for wavelength locking is a V-band broadband ratio. Coherent light source (V BLS); W-band BLS (W BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the W-band BLS; And seventh and eighth WDM filters connected in parallel with the first circulator and the second circulator, wherein the seventh WDM filter is connected to the first AWG, and the eighth WDM filter is connected to the first AWG. A second light source for wavelength immersion, the X-band wideband non-coherent light source (X BLS); Y-band BLS (Y BLS); A third circulator coupled to the X-band BLS; A fourth circulator connected to the Y-band BLS; And ninth and tenth WDM filters connected in parallel with the third circulator and the fourth circulator, wherein the ninth WDM filter is connected to the third AWG, and the tenth WDM filter is connected to the third AWG. It is to provide a network structure for broadband transmission connected to the 3 WDM filter.

According to a fifth aspect of the present invention, in the network structure for wideband transmission using a wavelength band allocation method, the existing wavelength division multiplexing passive optical subscriber network (WDM-PON) is provided in an optical termination device (OLT). And a plurality of first group transmitters (Tx) for transmitting downlink signals in the V-band, using X-bands in the existing A-band and X-bands in the B-band as transmission bands; A plurality of first group receivers (Rx) for receiving uplink signals in a band, and a plurality of first group wavelength division multiplexers (WDM) filters for separating optical signals in the V-band and the X-band. A plurality of first group transceivers (TRx) configured; A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal in the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal in the X-band, and the V-band and the X A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And a plurality of first group distribution optical fibers respectively connecting the plurality of first group ONTs to the periodic second AWG, wherein the additionally installed WDM-PON comprises the periodic within the OLT. Located at the rear end of the first AWG and connected to the periodic first AWG and the first group transceiver (TRx), respectively, to combine or separate the V-band and the X-band and to use for transmission band extension At least one third group band separation wavelength division multiplexer (BSWDM) filter for combining or separating the W-band in the A-band and the Y-band in the B-band; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group BSWDM filter, for transmitting downlink signals of the W-band in the A-band, and the B- At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band in a band, and at least one fourth group WDM filter for separating the optical signals of the W-band and the Y-band; At least one fourth group transceiver (TRx) configured; Located at the rear end of the periodic second AWG in the RN and connected to the periodic second AWG and the first group ONT, respectively, to combine or separate the V-band and the X-band and further to the W; At least one fifth group BSWDM filter for combining or separating the band and the Y-band; At least one sixth group receiver (Rx) for receiving the downlink signal of the W-band in the A-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating the optical signals in the W-band and the Y-band; And at least one second group distribution optical fiber connecting the at least one fifth group BSWDM filter and the at least one second group ONT, respectively.

According to a sixth aspect of the present invention, in the network structure for wideband transmission using a wavelength band allocation method, the existing wavelength division multiplexing passive optical subscriber network (WDM-PON) is provided in an optical termination device (OLT). And a plurality of first group transmitters (Tx) for transmitting downlink signals in the V-band, using X-bands in the existing A-band and X-bands in the B-band as transmission bands; A plurality of first group receivers (Rx) for receiving uplink signals in a band, and a plurality of first group wavelength division multiplexers (WDM) filters for separating optical signals in the V-band and the X-band. A plurality of first group transceivers (TRx); A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal in the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal in the X-band, and the V-band and the X A plurality of first group subscribers (ONTs) configured with a plurality of second group wavelength division multiplexer (WDM) filters for separating optical signals in the band; And a plurality of first group distribution optical fibers respectively connecting the plurality of first group ONTs to the periodic second AWG, wherein the additionally installed WDM-PON comprises the periodic within the OLT. Located at the rear end of the first AWG and connected to the periodic first AWG and the first group transceiver (TRx), respectively, to combine or separate the V-band and the X-band and to use for transmission band extension At least one third group band separation wavelength division multiplexer (BSWDM) filter for combining or separating the W-band in the A-band and the Y-band in the B-band; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one three group BSWDM filter, for transmitting downlink signals of the W-band in the A-band, and the B-band At least one fourth group receiver (Rx) for receiving the up-signal of the Y-band within and at least one fourth group WDM filter for separating the optical signals of the W-band and the Y-band At least one fourth group transceiver (TRx); Located at the rear end of the periodic second AWG within the RN and connected to the periodic second AWG and the second group transceiver (TRx), respectively, to combine or separate the V-band and the X-band; And at least one fifth group BSWDM filter for combining or separating the W-band and the Y-band; At least one sixth group receiver (Rx) for receiving the downlink signal of the W-band in the A-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating the optical signals in the W-band and the Y-band; At least one second group distribution fiber connecting the at least one fifth group BSWDM filter and the at least one second group ONT, respectively; A seventh BSWDM filter located within the OLT and connected to the periodic first AWG; An eighth BSWDM filter located within the OLT and connected to the SMF; A wavelength-locked first light source positioned in the OLT for injecting into the down-signal light source of the V-band and the up-signal light source of the X-band; And a second light source for wavelength locking located in the OLT, for injecting into the down signal light source of the W-band and the up signal light source of the Y-band, wherein the first light source for wavelength locking is a V-band broadband ratio. Coherent light source (V BLS); X-band BLS (X BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the X-band BLS; And ninth and tenth WDM filters connected in parallel with the first circulator and the second circulator, wherein the ninth WDM filter is connected to the seventh BSWDM filter, and the tenth WDM filter is A second light source for wavelength locking, the W-band wideband non-coherent light source (W BLS); Y-band BLS (Y BLS); A third circulator coupled to the W-band BLS; A fourth circulator connected to the Y-band BLS; And eleventh and twelfth WDM filters connected in parallel with the third and fourth circulators, wherein the eleventh WDM filter is connected to the seventh BSWDM filter, and the twelfth WDM filter is It is to provide a network structure for broadband transmission connected to an eighth BSWDM filter.

Further advantages of the present invention will become apparent from the following description with reference to the accompanying drawings in which like or like reference numerals designate like elements.

Hereinafter, the present invention will be described in detail with reference to Examples and drawings.

1 is a diagram illustrating a first wavelength band allocation method for wideband transmission used in the present invention.

Referring to FIG. 1, in the first wavelength allocation method for wideband transmission for use in a wideband transmission network structure according to the present invention, a conventionally used A-band and a B-band for extension of a transmission band or an existing one are used. A WDM filter is used to combine or separate the B-band and the A-band for the extension of the transmission band. In a preferred embodiment of the present invention, the WDM filter may be implemented as an edge filter or a band-pass filter. In the embodiment shown in FIG. 1, it is assumed that the WDM filter outputs the A-band through the Pass (P) terminal and outputs the B-band through the Reflect (R) terminal. The functions of the P terminal and the R terminal may be interchanged. In the existing A-band, there is a V-band for an uplink signal and a W-band for a downlink signal (or a W-band for an uplink signal and a V-band for a downlink signal). In the B-band for extending the transmission band, the X-band for the uplink signal and the Y-band for the downlink signal (or the Y-band for the uplink signal and the X-band for the downlink signal) may be allocated. Those skilled in the art can fully understand that the X-band and Y-band in the B-band may be used as the bands that are used in the past, and the V-band and W-band in the A-band may be used as the bands for extending the transmission band. There will be. In addition, in all embodiments of the present invention described below, the V-band, W-band, X-band, and Y-band are for example O-band (1260-1360 nm), E-band (1360-1460 nm). ), S-band (1460-1530 nm), C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm) may be sequentially selected. . Here, the V-band, the W-band, the X-band, and the Y-band are assigned names for convenience of description, and in FIG. 1, for example, the X-band and the Y-band within the A-band, and the B-band within the B-band. V-bands and W-bands may be allocated, and also the X-band, Y-band, V-band, and the O-band (1260-1360 nm), the E-band (1360-1460) described above. nm), S-band (1460-1530 nm), C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm) have.

FIG. 2 is a diagram illustrating a first embodiment of a network structure for wideband transmission of the present invention using the first wavelength band allocation method shown in FIG. 1.

1 and 2, the first embodiment of the broadband transmission network structure of the present invention using the first wavelength band allocation method is characterized by the cyclic characteristics of the AWG constituting the WDM-PON that is being used and At least one third WDM filter (WDM3) that combines or separates the A- and B-bands behind each of the periodic first AWG and the periodic second AWG located in the OLT and RN while using existing SMFs. And adding at least one fifth WDM filter WDM5 to use the B-band as a new transmission band.

More specifically, the existing WDM-PON used in the first embodiment of the present invention is located in an optical end device (OLT) and uses the V-band and the W-band as transmission bands in the existing A-band. A plurality of first group transmitters (Tx) for transmitting downlink signals in the V-band, a plurality of first group receivers (Rx) for receiving uplink signals in the W-band, and the V-bands and the A plurality of first group transceivers TRx composed of a plurality of first group wavelength division multiplexer filters WDM1 for separating W-band optical signals; A first AWG (AWG1) positioned in the optical termination device (OLT), the periodic first AWG for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG (AWG2) located in a remote node (RN) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode optical fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG; And a plurality of first group distribution optical fibers connected to the periodic second AWG, respectively, for receiving the downlink signals of the V-band, and the W-band. A plurality of second group transmitters (Tx) for transmitting an uplink signal of the < RTI ID = 0.0 > and < / RTI > a plurality of second group wavelength division multiplexer filters (WDM2) for separating optical signals in the V-band and the W-band. A plurality of first group subscribers (ONT1 to ONTn: Optical Network Termination).

On the other hand, the broadband transmission network structure according to the first embodiment of the present invention, in order to expand the transmission band by using the B-band as a transmission band in the WDM-PON is additionally installed, A-band behind the periodic first AWG At least one third group WDM filter (WDM3) for combining or separating the B and B bands, and at least one fifth group WDM for combining or separating the A and B bands after the periodic second AWG. Place the filter WDM5. In addition, for transmission of the B-band, at least one fourth group transmitter (Tx) for transmitting a downlink signal of the X-band in the B-band, receiving an uplink signal of the Y-band in the B-band At least one fourth group transceiver configured for at least one fourth group receiver Rx and at least one fourth group WDM filter WDM4 for separating optical signals in the X-band and the Y-band ( TRx) is located in the OLT. Further, at least one sixth group receiver Rx for receiving the downlink signal of the X-band in the B-band, and at least one sixth for transmitting the uplink signal of the Y-band in the B-band. At least one second group subscriber for transmission in the B-band consisting of a group transmitter Tx and at least one sixth group WDM filter WDM6 for separating optical signals in the X-band and the Y-band ONT is located on the first group subscriber (ONT) side.

In a preferred embodiment of the invention, the at least one third group WDM filter and the at least one fifth group WDM filter are each a third group edge filter and a fifth group edge filter or a third group bandpass filter and a fifth group band, respectively. It can be implemented as a pass filter. In addition, the at least one third group WDM filter has a third group pass terminal, a third group reflecting terminal and a third group common terminal, respectively, and the at least one fifth group WDM filter has a fifth group pass terminal, And a fifth group reflective terminal and a fifth group common terminal. The third group common terminals are each connected to the periodic first AWG, and the third group pass terminals are respectively connected to the corresponding first group WDM filters WDM1, and the third group reflective terminals are each connected to the fourth group WDM filters ( WDM4). Meanwhile, the fifth group common terminal is connected to the second periodic AWG, respectively, and the fifth group pass terminal is connected to the corresponding second group WDM filter WDM2 in the first group subscriber ONT, respectively. Reflecting terminals are respectively connected to a sixth group WDM filter WDM6.

In the embodiment shown in FIG. 2, the periodic first AWG and the periodic second AWG are each downlink signals in the A-band (i.e., transmitted through at least one third group WDM filter and at least one fifth group WDM filter). , V-band) and downlink signals in the B-band (i.e., X-band) or uplink signals in the A-band (i.e., W-band) and uplink signals in the B-band (i.e., Y-band). In order to pass through it, it should have periodic characteristics.

In the embodiment shown in FIG. 2 described above, the subscriber (ONTn + 1) of the new transmission band connected through the fifth reflection terminal and the second group distribution fiber of the fifth WDM filter located in the RN in the first group ONT Can be added. Furthermore, when the first group subscriber (ONT16), which is serviced through the existing A-band, desires additional bandwidth, the fifth WDM filter may be placed in front of the existing ONT16 to receive downlink signals of the X-band. A sixth receiver (Rx), a sixth transmitter (Tx) for transmitting uplink signals in the Y-band, and a sixth WDM filter (WDM6) for separating optical signals in the X- and Y-bands; By adding ONT for transmission of the band, service through the B-band may be additionally provided by connecting the sixth WDM filter (WDM6) to the reflection terminal of the fifth WDM filter (see ONT16 of FIG. 2). However, those skilled in the art will appreciate that the plurality of fifth WDM filters are all located in the RN (when the fifth WDM filter located in the ONT16 in FIG. 2 is located in the RN and connected as ONTn + 1), or the plurality of fifth WDMs. It will be fully understood that the filters may all be located in front of the first group ONT (if the fifth WDM filter located in RN in FIG. 2 is located in front of ONT1 or ONTn and connected with ONT16). .

Here, at least one fourth group transceiver (TRx) using the B-band as a new transmission band may be selectively installed when a subscriber is newly added (in case of ONTn + 1), and also existing A-band. Even if the subscriber who is provided with the service (in case of ONT16) wants additional bandwidth, the B-band can be added as a transmission band to provide improved performance of the service.

Meanwhile, in the first embodiment (see FIG. 2) of the broadband transmission network structure using the first wavelength band allocation method of the present invention shown in FIG. 1, at least one third WDM filter added for transmission of the B-band. And the at least one fifth WDM filter is the same filter and may be pre-installed for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the fourth group WDM filter may be the same as the sixth group WDM filter. The at least one third group WDM filter may be the same as the at least one fifth group WDM filter. In addition, the first AWG and the second AWG should have the same free spectral range (FSR).

3 is a diagram illustrating a second embodiment of a network structure for wideband transmission of the present invention using the first wavelength band allocation method shown in FIG.

The second embodiment of the broadband transmission network structure of the present invention using the first wavelength band allocation method is configured to add a transmission band while sharing a feeder fiber in the existing WDM-PON. More specifically, the existing WDM-PON used in the second embodiment of the broadband transport network structure according to the present invention shown in FIG. 3 is substantially the same as the existing WDM-PON shown in FIG. More specifically, a third WDM filter and a fourth WDM filter for combining or separating an A-band and a B-band to an optical line termination (OLT) and a remote node (RN) (FIG. 3). In this case, a subscriber network using a B-band, which is a new transmission band, is added using WDM3 and WDM4. That is, the existing WDM-PON is located in an optical end device (OLT), and uses a V-band and a W-band as transmission bands in the existing A-band, but transmits a plurality of downlink signals for the V-band. First group transmitters Tx, a plurality of first group receivers Rx for receiving uplink signals in the W-band, and a plurality of first groups for separating optical signals in the V-band and the W-bands; A plurality of first group transceivers TRx composed of one group wavelength division multiplexer filter WDM1; A first waveguide array grating (AWG1) located in the optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second AWG (AWG2) located in a remote node (RN) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode optical fiber (SMF) connected between the first AWG and the second AWG and transmitting an optical signal multiplexed by the first AWG and the second AWG; And a plurality of first group distribution optical fibers respectively connected to the second AWG, the plurality of second group receivers Rx for receiving the downlink signal of the V-band, and the upstream of the W-band. A plurality of second group transmitters (Tx) for transmitting signals and a plurality of second group wavelength division multiplexer filters (WDM2) for separating optical signals in the V-band and the W-band; It includes one group subscriber (ONT1 to ONTn).

On the other hand, the network structure for wideband transmission according to the second embodiment of the present invention is located on the OLT side in order to expand the transmission band by using the B-band as a transmission band in the WDM-PON is additionally installed, A third WDM filter (WDM3) for combining or separating the A-band and the B-band between a first AWG and the SMF; And a fourth WDM filter (WDM4) located at the RN side and combining or separating the A-band and the B-band between the second AWG and the SMF. In a preferred embodiment of the present invention, the third WDM filter and the fourth WDM filter may be implemented as a third edge filter and a fourth edge filter or a third bandpass filter and a fourth bandpass filter, respectively. The third WDM filter has a third pass terminal, a third reflecting terminal and a third common terminal, and the fourth WDM filter has a fourth pass terminal, a fourth reflecting terminal and a fourth common terminal. The third pass terminal is connected to the first AWG and the third common terminal is connected to the SMF. In addition, the fourth pass terminal is connected to the second AWG and the fourth common terminal is connected to the SMF.

In order to transmit the B-band, a plurality of fifth group transmitters (Tx) for transmitting downlink signals of the X-band in the B-band, and a plurality of agents for receiving uplink signals of the Y-band in the B-band A plurality of fifth group transceivers (TRx) comprising a 5-group receiver (Rx) and a plurality of fifth group wavelength division multiplexer filters (WDM5) for separating optical signals in the X-band and the Y-band; And a third AWG (AWG3) connected to each of the fifth group wavelength division multiplexers (WDM5), for wavelength division multiplexing or demultiplexing a plurality of optical signals. In addition, a plurality of sixth group receivers (Rx) for receiving the downlink signal of the X-band, a plurality of sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band, and the X-band and A plurality of second group ONTs (ONTn + 1 to ONTn + m) constituted by a plurality of sixth group wavelength division multiplexer filters WDM6 for separating the optical signals in the Y-band are further added to the first group ONT side. Is located. Further, the RN is connected to the fourth reflective terminal, each of the sixth group of WDM6 filters is connected by a plurality of second group split optical fibers, and the plurality of optical signals are wavelength-division multiplexed or A fourth AWG (AWG4) for further demultiplexing is further located.

Accordingly, the second embodiment of the network structure for broadband transmission according to the present invention may be implemented with two WDM filters (specifically, two edge filters or two bandpass filters in the existing WDM-PON). In FIG. 3, the A-band used for the existing WDM-PON and the B-band for the expansion of the transmission band are combined or separated by using WDM3 and WDM4), thereby sharing existing trunk fibers. It is possible to add or expand the band. Those skilled in the art, even if the B-band is used as a band used for the existing WDM-PON, and the A-band as the band for the expansion of the transmission band, the transmission band while sharing the existing trunk fiber installed in the same way It will be appreciated that it is possible to add or extend.

In addition, in the second embodiment of the present invention, the existing subscriber network using the A-band as the transmission band and the additionally installed subscriber network using the B-band as the transmission band can independently select the light source and the number of subscribers of the WDM-PON. Can be.

Meanwhile, in the second embodiment of the broadband transmission network structure using the first wavelength band allocation method of the present invention shown in FIG. 3, the third and fourth WDM filters added for transmission of the B-band are the same filter. It may be installed in advance for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the fifth group WDM filter may be the same as the sixth group WDM filter. The first AWG and the second AWG should have the same free spectral range (FSR), and the third AWG and the fourth AWG should also have the same FSR.

4 is a diagram illustrating a third embodiment of a network structure for wideband transmission of the present invention using the first wavelength band allocation method shown in FIG. 1.

Referring to FIG. 4, the third embodiment of the network structure for broadband transmission according to the present invention is A-band as a transmission band in the first embodiment of the network structure for broadband transmission according to the present invention shown in FIG. The case where the light source in the WDM-PON for transmission band extension using the existing WDM-PON and B-bands as a transmission band is specifically illustrated as a wavelength-locked light source. In addition, a specific example of the wavelength-locked light source shown in FIGS. 4 and 5 and 8 which will be described later is described by Hyun Kim (HD Kim) et al. "A low-cost WDM sourc with an ASE injected Fabry-" Perot semiconductors laser, "IEEE Photon. Technol. Lett., Vol. 12, no. 8, pp. 1067-1069, Aug. It is described in detail in 2000, and the contents described in this paper by H. D. Kim et al. Are referred to herein and form part of the present invention.

More specifically, in the embodiment of Figure 4 V-band BLS (V BLS) and W for implementing a wavelength-locked first light source for injection into the V-band down-signal light source and the W-band up-signal light source A band BLS (W BLS) is connected to the first circulator 1 and the second circulator 2, respectively. The first and second circulators are connected in parallel with two ninth and tenth wavelength division multiplexer filters WDM9 and WDM10, respectively. The ninth WDM filter is connected to the seventh pass terminal of the seventh WDM filter WDM7, and the tenth WDM filter is connected to the eighth pass terminal of the eighth WDM filter WDM8. In addition, the X-band BLS (X BLS) and the Y-band BLS (for implementing the wavelength-locked second light source for injecting the X-band downward signal light source for transmission band extension and the Y-band upward signal light source) Y BLS) is also connected to a third circulator 3 and a fourth circulator 4, respectively. The third and fourth circulators are connected in parallel with two eleventh and twelfth wavelength division multiplexer filters WDM11 and WDM12, respectively. The eleventh WDM filter is connected to the seventh reflective terminal of the seventh WDM filter, and the twelfth WDM filter is connected to the eighth reflective terminal of the eighth WDM filter. Meanwhile, the seventh common terminal of the seventh WDM filter is connected to the first periodic AWG, and the eighth common terminal of the eighth WDM filter is connected to the SMF. Here, the first group transmitter (Tx), the second group transmitter (Tx), the fourth group transmitter (Tx), and the sixth group transmitter (Tx) which exist on the OLT and ONT side are the FP of the wavelength band used for transmission. LD or RSOA may be located. In addition, the at least one third group WDM filter WDM3, the at least one fifth group WDM filter WDM5, the seventh WDM filter WDM7, and the eighth WDM filter are respectively a third edge filter and a fifth edge filter. A seventh edge filter, and an eighth edge filter; Alternatively, the third bandpass filter, the fifth bandpass filter, the seventh bandpass filter, and the eighth bandpass filter may be implemented.

Meanwhile, in the third embodiment of the network structure for wideband transmission using the first wavelength band allocation method of the present invention shown in FIG. 4, at least one third group WDM filter added for transmission of the B-band, at least One fifth group WDM filter, seventh WDM filter and eighth WDM filter are the same filter and may be pre-installed for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the at least one fourth group WDM filter may be the same as the at least one sixth group WDM filter. The ninth WDM filter and the tenth WDM filter may be the same as the first group WDM filter, and the eleventh WDM filter and the twelfth WDM filter may be the same as the at least one fourth group WDM filter. In addition, the periodic first AWG and the periodic second AWG must have the same FSR.

FIG. 5 is a diagram illustrating a fourth embodiment of a broadband transport network structure of the present invention using the first wavelength band allocation method shown in FIG. 1.

Referring to FIG. 5, the fourth embodiment of the network structure for broadband transmission according to the present invention is A-band as a transmission band in the second embodiment of the network structure for broadband transmission according to the present invention shown in FIG. The case where the light source in the WDM-PON for transmission band extension using the existing WDM-PON and B-bands as a transmission band is a specific example of a wavelength-locked light source. In the embodiment of FIG. 5, the V-band wideband non-coherent light source (V BLS) and W for implementing the wavelength-locked first light source for injecting the V-band downward signal light source and the W-band upward signal light source. The band BLS (W BLS) is connected to a first circulator 1 and a second circulator 2, respectively. The first and second circulators are connected in parallel with two seventh and eighth wavelength division multiplexer filters WDM7 and WDM8, respectively. The seventh WDM filter is connected with the first AWG (AWG 1), and the eighth WDM filter is connected with the third pass terminal of the third WDM filter (WDM3) located in the OLT. In addition, the X-band BLS (X BLS) and the Y-band BLS (Y) for implementing a wavelength-locked second light source for injection into the X-band downlink signal source for transmission band extension and the Y-band uplink signal source BLS) is also connected to a third circulator 3 and a fourth circulator 4, respectively. The third and fourth circulators are connected in parallel with two ninth and tenth wavelength division multiplexer filters WDM9 and WDM10, respectively. The ninth WDM filter is connected with a third AWG (AWG3), and the tenth WDM filter is connected with a third reflective terminal of the third WDM filter located in the OLT. Here, the first group transmitter (Tx), the second group transmitter (Tx), the fifth group transmitter (Tx), and the sixth group transmitter (Tx) which exist on the OLT and ONT side include the wavelength bands used for transmission. Fabry-Perot laser diodes (FP LD) or reflective semiconductor optical amplifiers (RSOA) may be located.

In the fourth embodiment of the present invention shown in FIG. 5, the existing subscriber network using the A-band as the transmission band and the additionally installed subscriber network using the B-band as the transmission band are configured to use the light source and the number of subscribers of the WDM-PON. You can choose independently.

Meanwhile, in the fourth embodiment of the network structure for wideband transmission of the present invention using the first wavelength band allocation method shown in FIG. 5, the third WDM filter and the fourth WDM filter added for B-band transmission are It is the same filter and may be pre-installed for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the at least one fifth group WDM filter may be the same as the at least one sixth group WDM filter. The seventh and eighth WDM filters may be the same as the first group WDM filter, and the ninth and tenth WDM filters may be the same as the at least one fifth group WDM filter. The first and second AWGs must have the same free spectral region (FSR), and the third and fourth AWGs must also have the same FSR.

6 is a diagram illustrating a second wavelength band allocation method for wideband transmission used in the present invention.

Referring to FIG. 6, in the second wavelength allocation method for wideband transmission for use in a network structure for wideband transmission according to the present invention, from the V-band in the A-band and the X-band in the B-band, which are conventionally used. It serves to combine or separate the W-band in the A-band and the Y-band in the B-band for the expansion of the transmission band, or the transmission band from the W-band in the A-band and the Y-band in the B-band. For example, a band-splitting wavelength division multiplexer (BSWDM) filter may be used as a WDM filter that combines or separates the V-band in the A-band and the X-band in the B-band. A specific example of the BSWDM filter is disclosed in December 28, 2005 by one of the inventors of the present invention, entitled "Multi-Stage Divide Wavelength Division Multiplexing Passive Optical Subscriber Network Device Using Wavelength Allocation Method". After filed with -2005-0131999, it was registered as Korean Patent No. 683833 dated February 9, 2007, which is described in detail in the specification published February 16, 2007. The 683833 patent is incorporated herein by reference and forms part of the invention.

In the embodiment shown in Fig. 6, the BSWDM filter outputs the V-band in the A-band and the X-band in the B-band through the pass terminal P, and the W- in the A-band through the reflective terminal R. Assume that we output the Y-band within the band and the B-band. The function of the pass terminal and the reflecting terminal may be interchanged. The existing V-band in the A-band is a downlink signal, the X-band in the B-band is an uplink signal (or the V-band in the A-band is an uplink signal, and the X-band in the B-band is a downlink signal). Is used. A band for the extension of the transmission band, the W-band in the A-band is a downlink signal, the Y-band in the B-band is an uplink signal (or the W-band in the A-band is an uplink signal, and the Y-band in the B-band). Band is used as a downlink signal). Those skilled in the art use the W-band in the A-band and the Y-band in the B-band as the existing bands, and the V-band in the A-band and the X in the B-band as the band for extension of the transmission band. It will be appreciated that the band can be used.

FIG. 7 is a diagram illustrating a first embodiment of a network structure for wideband transmission of the present invention using the second wavelength band allocation method shown in FIG. 6.

6 and 7, a first embodiment of a network structure for wideband transmission of the present invention using a second wavelength band allocation method includes a first AWG and a second AWG constituting a WDM-PON. Using the periodic characteristics and pre-installed single-mode fiber (SMF), the V-band in the A-band and the X-band in the B-band and the W-in the A-band at the back end of the periodic first AWG located at the OLT and RN. Add at least one third group BSWDM filter (BSWDM3) that combines or separates the Y-bands in the band and B-bands, and in the V- and B-bands in the A-band at the back end of the periodic second AWG Add at least one fifth group BSWDM filter (BSWDM5) that combines or separates the W-bands in the X-band and the A-bands and the Y-bands in the B-band, so that the W-bands in the A-bands and the B-bands are This is the case when the Y-band is used as a new transmission band. Here, the fourth group transceiver (TRx) using the W-band in the A-band and the Y-band in the B-band as a new transmission band may be selectively installed when a subscriber is newly added (in case of ONTn + 1). The W-band and B-bands in the A-band can also be used, even if the subscribers served through the X-bands in the V-band and B-bands in the existing A-band want additional bandwidth (in the case of ONT16). By adding the Y-band in the band as a transmission band, a service of improved performance can be provided.

More specifically, the embodiment shown in FIG. 7 comprises at least one third WDM filter and at least one fifth WDM filter (specifically, used in OLT, RN, and ONT in the embodiment shown in FIG. 2). The structure is substantially the same except that a BSWDM filter is used instead of an edge filter or a bandpass filter, respectively). That is, referring to FIGS. 2 and 7, in the network structure for broadband transmission according to the embodiment of the present invention shown in FIG. 7, the X in the V-band and the B-band in the A-band to increase the transmission band. Giving at least one third BSWDM filter that combines or separates the bands into the W-bands in the A-band and the Y-bands in the B-band, behind the periodic first AWG, and at least one fifth BSWDM filter Each at the rear end of the second AWG. Here, at least one fourth group transmitter (Tx) for transmitting the downlink signal of the W-band, at least one fourth group receiver (Rx) for receiving the uplink signal of the Y-band, and the W-band and At least one fourth group transceiver TRx composed of at least one fourth group WDM filter WDM4 for separating the Y-band optical signal is reflected by the third group of at least one third BSWDM filter located at the OLT It is connected to each terminal. In this case, the at least one fourth group WDM filter WDM4 used may be the same as or different from the first group WDM filter WDM1 for separating optical signals in the V-band and the X-band. In addition, at least one sixth group receiver (Rx) for receiving the downlink signal of the W-band, at least one sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band, and the W-band and At least one fifth and one fifth group reflecting terminal of at least one fifth BSWDM filter having at least one ONT comprised of at least one sixth group WDM filter (WDM6) for separating the Y-band optical signal; Connected via two-group distribution fiber optics, it can be added as a subscriber in a new transmission band (eg, ONTn + 1). At least one sixth group WDM filter WDM6 used at this time may be the same as or different from the second group WDM filter WDM2 for separating optical signals in the V-band and the X-band.

Furthermore, if the subscriber (ONT16) served through the existing V-band and X-band wants additional bandwidth, the fifth BSWDM filter is placed in front of the existing ONT16 and the downlink signal of the W-band is received. ONT consisting of a sixth receiver (Rx), a sixth transmitter (Tx) for uplink signal transmission in the Y-band, and a sixth WDM filter (WDM6) for separating optical signals in the W-band and the Y-band. The service may be further received by connecting to the reflective terminal of the fifth BSWDM filter (see ONT16 of FIG. 7). In the embodiment of FIG. 7 described above, at least one fifth BSWDM filter is located in the RN, and another at least one fifth BSWDM filter is shown in front of the first group ONT (ONT16). Both fifth fifth BSWDM filters are located within the RN (if the fifth BSWDM filter located in front of ONT16 in FIG. 7 is located within the RN and connected as ONTn + 1), or both fifth BSWDM filters are both It will be appreciated that it may be located at the front of the first group ONT (if the fifth BSWDM filter located in the RN in FIG. 7 is located in ONT1 or ONTn and connected with ONT16).

In addition, in the first embodiment of the network structure for wideband transmission of the present invention using the second wavelength band allocation method shown in FIG. 7, at least one third BSWDM filter and at least one fifth added to increase transmission bands. The BSWDM filter is the same filter and may be pre-installed for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the at least one fourth group WDM filter may be the same as the at least one sixth group WDM filter. In addition, the periodic first AWG and the periodic second AWG must have the same FSR.

FIG. 8 is a diagram illustrating a second embodiment of a network structure for wideband transmission of the present invention using the second wavelength band allocation method shown in FIG. 6.

6 and 8, a second embodiment of a network structure for wideband transmission of the present invention using the second wavelength band allocation method is a diagram of a network structure for wideband transmission of the present invention using the second wavelength band allocation method. In the structure of FIG. 7 which is the first embodiment, the existing WDM-PON using the V-band in the A-band and the X-band in the B-band as a transmission band, and the W-band in the A-band and Y- in the B-band The case where the wavelength-locked light source is used as a light source in the WDM-PON for extending the transmission band by using the band is specifically illustrated.

More specifically, the V-band BLS (V BLS) and the X-band BLS (X) for implementing a wavelength-locked first light source for injection into the V-band downlink signal light source and the X-band uplink signal light source. BLS) is connected to a first circulator 1 and a second circulator 2, respectively. The first and second circulators are connected in parallel with two ninth and tenth wavelength division multiplexer filters WDM9 and WDM10, respectively. The ninth WDM filter is connected to the seventh pass terminal of the seventh BSWDM filter BSWDM7, and the tenth WDM filter is connected to the eighth pass terminal of the eighth BSWDM filter BSWDM8. In addition, the W-band BLS (W BLS) and the Y-band BLS (for implementing the wavelength-locked second light source for injecting the W-band downward signal light source for transmission band extension and the Y-band upward signal light source) Y BLS) is also connected to a third circulator 3 and a fourth circulator 4, respectively. The third and fourth circulators are connected in parallel with two eleventh and twelfth wavelength division multiplexer filters WDM11 and WDM12, respectively. The eleventh WDM filter is connected to the seventh reflective terminal of the seventh BSWDM filter, and the twelfth WDM filter is connected to the eighth reflective terminal of the eighth BSWDM filter. Meanwhile, the seventh common terminal of the seventh BSWDM filter is connected to the first periodic AWG, and the eighth common terminal of the eighth BSWDM filter is connected to the SMF. Here, the first group transmitter (Tx), the second group transmitter (Tx), the fourth group transmitter (Tx), and the sixth group transmitter (Tx) which exist on the OLT and ONT side are the FP of the wavelength band used for transmission. LD or RSOA may be located.

Meanwhile, in the second embodiment of the network structure for wideband transmission of the present invention using the second wavelength band allocation method shown in FIG. 8, at least one third group BSWDM filter added to increase transmission band, at least one The fifth group BSWDM filter, the seventh BSWDM filter, and the eighth BSWDM filter are the same filter and may be pre-installed for transmission band extension. The first group WDM filter may be the same as the second group WDM filter, and the at least one fourth group WDM filter may be the same as the at least one sixth group WDM filter. The ninth WDM filter and the tenth WDM filter may be the same as the first group WDM filter, and the eleventh WDM filter and the twelfth WDM filter may be the same as the fourth group WDM filter. Here, at least one fourth group WDM filter (WDM4) or at least one sixth group WDM filter (WDM6) separating the W-band and the Y-band is a first group WDM separating the V-band and the X-band. It may be the same as or different from the filter WDM1 or the second group WDM filter WDM2. In addition, the periodic first AWG and the periodic second AWG must have the same FSR.

The network structure for wideband transmission using the wavelength band allocation method according to the present invention achieves the following effects.

1. By using the WDM filter's wavelength separation characteristics while maintaining the existing wavelength band and infrastructure, the installation cost of adding a new WDM-PON separate from the existing WDM-PON is significantly reduced.

2. It is possible to add wavelength band in an economical and easy way, and it can be used for the evolution of subscriber network.

As various modifications may be made to the constructions and methods described and illustrated herein without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings be exemplary, and not intended to limit the invention. It is not. Therefore, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims (63)

In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters (Tx) for transmitting downlink signals of the V-band using the V-band and the W-band as transmission bands in the existing A-band. A plurality of first group receivers (Rx) for receiving the uplink signals of the W-band, and a plurality of first group wavelength division multiplexers (WDM) for separating the optical signals of the V-band and the W-band; A plurality of first group transceivers (TRx) configured as filters; A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal of the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal of the W-band, and the V-band and the W A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And A plurality of first group distribution optical fibers respectively connecting the plurality of first groups ONT to the second AWG Including, Additional WDM-PON Located at the rear end of the periodic first AWG in the OLT and connected to the periodic first AWG and the first group transceiver (TRx), respectively, the A-band and the B-band for transmission band extension. At least one third group WDM filter for coupling or separating; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group WDM filter, for transmitting downlink signals of the X-band in the B-band, and the B-band At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band in the at least one and at least one fourth group WDM filter for separating the optical signals of the X-band and the Y-band One fourth group transceiver TRx; At least one end of the periodic second AWG in the RN and coupled to the periodic second AWG and the first group ONT, respectively, for combining or separating the A-band and the B-band; A fifth group WDM filter; At least one sixth group receiver (Rx) for receiving the downlink signal of the X-band in the B-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating optical signals in the X-band and the Y-band; And At least one second group split optical fiber connecting the at least one fifth group WDM filter and the at least one second group ONT, respectively Containing Network structure for broadband transmission. The method of claim 1, The at least one fifth group WDM filter is located in front of the first group subscriber and is connected to the periodic second AWG by the at least one second group distribution fiber, and the at least one second group ONT Network structure for broadband transmission connected with. The method of claim 1, The at least one third group WDM filter, the at least one fourth group transceiver (TRx), the at least one fifth group WDM filter, the at least one second group ONT, and the at least one second group distribution Two or more optical fibers are used, Some of the at least two fifth group WDM filters are respectively located in front of the first group subscriber and are connected to the periodic second AWG by corresponding portions of the at least two group distribution optical fibers, A network structure for broadband transmission connected with a corresponding portion of at least two second group ONTs. The method according to any one of claims 1 to 3, The at least one third group WDM filter and the at least one fifth group WDM filter may each include a third edge filter and a fifth edge filter, or a third bandpass filter and a fifth bandpass filter. Network structure. The method according to any one of claims 1 to 3, Each of the at least one third group WDM filter has a third group pass terminal, a third group reflecting terminal and a third group common terminal, Each of the at least one fifth group WDM filter includes a fifth group pass terminal, a fifth group reflecting terminal, and a fifth group common terminal, The third group common terminals are respectively connected to the periodic first AWG, the third group pass terminals are respectively connected to the corresponding first group WDM filters, and the third group reflective terminals are each of the at least one Connected to the fourth group WDM filter, The fifth group common terminal is connected to the periodic second AWG, respectively, and the fifth group pass terminal is connected to the corresponding second group WDM filter, respectively, and the fifth group reflective terminal is each the sixth group WDM Connected to the filter Network structure for broadband transmission. The method of claim 5, And the third group pass terminal and the fifth group pass terminal output the A-band, and the third group reflecting terminal and the fifth group reflecting terminal output the B-band. The method of claim 5, And the third group pass terminal and the fifth group pass terminal output the B-band, and the third group reflect terminal and the fifth group reflect terminal output the A-band. The method according to any one of claims 1 to 3, The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method according to any one of claims 1 to 3, And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method according to any one of claims 1 to 3, The at least one third WDM filter and the at least one fifth WDM filter may be pre-installed for transmission band extension. The method according to any one of claims 1 to 3, And wherein the periodic first AWG and the periodic second AWG have the same free spectral range (FSR). In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters (Tx) for transmitting downlink signals of the V-band using the V-band and the W-band as transmission bands in the existing A-band. A plurality of first group receivers (Rx) for receiving the uplink signals of the W-band, and a plurality of first group wavelength division multiplexers (WDM) for separating the optical signals of the V-band and the W-band; A plurality of first group transceivers (TRx) configured as filters; A first waveguide array grating (AWG), located in the optical termination device (OLT), for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second AWG located in a remote node, the second AWG for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) connected between the first AWG and the second AWG and transmitting an optical signal multiplexed by the first AWG and the second AWG; And A plurality of first group distribution optical fibers respectively coupled to the second AWG, a plurality of second group receivers Rx for receiving downlink signals of the V-band, and uplink signals of the W-band; A plurality of first group subscribers (ONT) comprising a plurality of second group transmitters (Tx) for transmitting a plurality of signals, and a plurality of second group WDM filters for separating optical signals in the V-band and the W-band Network Termination) Including, Additional WDM-PON A third WDM filter located at the OLT side and combining or separating the A-band and the B-band for transmission band extension between the first AWG and the SMF; A fourth WDM filter positioned at the RN side and combining or separating the A-band and the B-band between the second AWG and the SMF; A plurality of fifth group transmitters (Tx), located in the OLT, for transmitting downlink signals in the X-band in the B-band, and a plurality of fifth for receiving uplink signals in the Y-band in the B-band; A plurality of fifth group transceivers (TRx) comprising a group receiver (Rx) and a plurality of fifth group WDM filters for separating optical signals in the X-band and the Y-band; A third AWG located within the OLT, connected to the third WDM filter, and connected to each of the fifth group WDM filters, for wavelength division multiplexing or demultiplexing a plurality of optical signals; Located at the first group ONT side, a plurality of sixth group receiver (Rx) for receiving the downlink signal of the X-band, a plurality of sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band And a plurality of second group ONTs composed of a plurality of sixth group WDM filters for separating optical signals in the X-band and the Y-band; And A fourth portion located in the RN, connected to the fourth WDM filter, connected to each of the sixth group WDM filters by a plurality of second group split optical fibers, and configured to perform wavelength division multiplexing or demultiplexing of the plurality of optical signals; AWG Containing Network structure for broadband transmission. The method of claim 12, And the third WDM filter and the fourth WDM filter are implemented as a third edge filter and a fourth edge filter, or a third bandpass filter and a fourth bandpass filter, respectively. The method of claim 13, The third WDM filter has a third pass-through terminal, a third reflecting terminal and a third common terminal, The fourth WDM filter has a fourth pass-through terminal, a fourth reflecting terminal, and a fourth common terminal. The third pass-through terminal is connected to the first AWG, the third reflective terminal is connected to the third AWG, the third common terminal is connected to the SMF, The fourth pass-through terminal is connected to the second AWG, the fourth reflective terminal is connected to the fourth AWG, and the fourth common terminal is connected to the SMF. Network structure for broadband transmission. The method of claim 14, The third pass terminal and the fourth pass terminal output the A-band, and the third reflecting terminal and the fourth reflecting terminal output the B-band. The method of claim 14, The third pass terminal and the fourth pass terminal output the B-band, and the third reflecting terminal and the fourth reflecting terminal output the A-band. The method according to any one of claims 12 to 16, The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method according to any one of claims 12 to 16, And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method according to any one of claims 12 to 16, The third WDM filter and the fourth WDM filter may be pre-installed for transmission band extension. The method according to any one of claims 12 to 16, And the first AWG and the second AWG have the same FSR, and the third AWG and the fourth AWG also have the same FSR. In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters (Tx) for transmitting downlink signals of the V-band using the V-band and the W-band as transmission bands in the existing A-band. A plurality of first group receivers (Rx) for receiving the uplink signals of the W-band, and a plurality of first group wavelength division multiplexers (WDM) for separating the optical signals of the V-band and the W-band; A plurality of first group transceivers (TRx) configured as filters; A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal of the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal of the W-band, and the V-band and the W A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And A plurality of first group distribution optical fibers connecting the periodic second AWG and the plurality of first groups ONT, respectively; Including, Additional WDM-PON Located at the rear end of the periodic first AWG in the OLT and connected to the periodic first AWG and the first group transceiver (TRx), respectively, the A-band and the B-band for transmission band extension. At least one third group WDM filter for coupling or separating; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group WDM filter, for transmitting downlink signals of the X-band in the B-band, and the B-band At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band in the at least one and at least one fourth group WDM filter for separating the optical signals of the X-band and the Y-band One fourth group transceiver TRx; Located at the rear end of the periodic second AWG in the RN and coupled to the periodic second AWG and the first group ONT, respectively, or combine or separate the A-band and the B-band for transmission band extension; At least one fifth group WDM filter; At least one sixth group receiver (Rx) for receiving the downlink signal of the X-band in the B-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating optical signals in the X-band and the Y-band; At least one second group distribution optical fiber connecting the at least one fifth group WDM filter and the at least one second group ONT, respectively; A seventh WDM filter located within the OLT and connected to the periodic first AWG; An eighth WDM filter located within the OLT and connected to the SMF; A wavelength-locked first light source positioned in the OLT and for injecting into the down-signal light source of the V-band and the up-signal light source of the W-band; And A second light source for wavelength locking located within the OLT and for injecting into the down-signal light source of the X-band and the up-signal light source of the Y-band. Including, The wavelength-locked first light source includes a V-band wideband non-coherent light source (V BLS); W-band BLS (W BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the W-band BLS; And ninth and tenth WDM filters connected in parallel with the first circulator and the second circulator, The ninth WDM filter is connected to the seventh WDM filter, the tenth WDM filter is connected to the eighth WDM filter, The wavelength immersing second light source includes an X-band wideband non-coherent light source (X BLS); Y-band BLS (Y BLS); A third circulator coupled to the X-band BLS; A fourth circulator connected to the Y-band BLS; And eleventh and twelfth WDM filters connected in parallel with the third and fourth circulators, The eleventh WDM filter is connected to the seventh WDM filter, and the twelfth WDM filter is connected to the eighth WDM filter. Network structure for broadband transmission. The method of claim 21, The at least one fifth group WDM filter is respectively located at the front end of the first group ONT, and is connected to the periodic second AWG by the at least one second group distribution fiber, and the at least one second group Network structure for broadband transmission connected with ONT. The method of claim 21, The at least one third group WDM filter, the at least one fourth group transceiver (TRx), the at least one fifth group WDM filter, the at least one second group ONT, and the at least one second group distribution Two or more optical fibers are used, Some of the two or more fifth group WDM filters are each located at the front end of the first group ONT, and are connected to the periodic second AWG by corresponding portions of the two or more group distribution optical fibers, Connected with a corresponding part of more than one second group ONT Network structure for broadband transmission. The method according to any one of claims 21 to 23, wherein The at least one third group WDM filter, the at least one fifth group WDM filter, the seventh WDM filter, and the eighth WDM filter, respectively, a third edge filter, a fifth edge filter, a seventh edge filter, and A network structure for wideband transmission implemented by an eighth edge filter, or a third bandpass filter, a fifth bandpass filter, a seventh bandpass filter, and an eighth bandpass filter. The method according to any one of claims 21 to 23, wherein Each of the at least one third group WDM filter has a third pass-through terminal, a third reflecting terminal and a third common terminal, The at least one fifth group WDM filter has a fifth pass through terminal, a fifth reflecting terminal and a fifth common terminal, respectively. The seventh WDM filter has a seventh pass terminal, a seventh reflective terminal, and a seventh common terminal, The eighth WDM filter includes an eighth pass terminal, an eighth reflection terminal, and an eighth common terminal, The third pass-through terminals are respectively connected to the first group WDM filter, the third reflecting terminals are each connected to the at least one fourth group WDM filter, and the third common terminals are each the first periodic AWG. Connected to, The fifth pass-through terminal is connected to the second group WDM filter, respectively, and the fifth reflecting terminal is connected to the at least one sixth group WDM filter, respectively, and the fifth common terminal is connected to the second AWG, respectively. Become, The seventh pass terminal is connected to the ninth WDM filter, the seventh reflective terminal is connected to the eleventh WDM filter, the seventh common terminal is connected to the periodic first AWG, The eighth pass terminal is connected to the tenth WDM filter, the eighth reflective terminal is connected to the twelfth WDM filter, and the eighth common terminal is connected to the SMF. Network structure for broadband transmission. The method according to any one of claims 21 to 23, wherein The first group transmitter Tx, the second group transmitter Tx, the fourth group transmitter Tx, and the sixth group transmitter Tx include a Fabry-Perot laser diode of a wavelength band used for transmission. Network structure for wideband transmission in which an FP LD) or a reflective semiconductor optical amplifier (RSOA) is located. The method of claim 25, The third pass terminal, the fifth pass terminal, the seventh pass terminal, and the eighth pass terminal respectively output the A-band, and the third reflection terminal, the fifth reflection terminal, and the seventh reflection. And a eighth reflective terminal each outputting the B-band. The method of claim 25, The third pass terminal, the fifth pass terminal, the seventh pass terminal, and the eighth pass terminal respectively output the B-band, and the third reflective terminal, the fifth reflective terminal, and the seventh reflective terminal And a eighth reflective terminal each outputting the A-band. The method according to any one of claims 21 to 23, wherein The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method according to any one of claims 21 to 23, wherein And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method according to any one of claims 21 to 23, wherein The at least one third group WDM filter, the at least one fifth group WDM filter, the seventh WDM filter, and the eighth WDM filter may be pre-installed for transmission band extension. The method according to any one of claims 21 to 23, wherein And wherein the periodic first AWG and the periodic second AWG have the same FSR. In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters (Tx) for transmitting downlink signals of the V-band using the V-band and the W-band as transmission bands in the existing A-band. A plurality of first group receivers (Rx) for receiving the uplink signals of the W-band, and a plurality of first group wavelength division multiplexers (WDM) for separating the optical signals of the V-band and the W-band; A plurality of first group transceivers (TRx) configured as filters; A first waveguide array grating (AWG), located in the optical termination device (OLT), for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second AWG located in a remote node, the second AWG for wavelength division multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) connected between the first AWG and the second AWG and transmitting an optical signal multiplexed by the first AWG and the second AWG; And A plurality of first group distribution optical fibers respectively coupled to the second AWG, a plurality of second group receivers Rx for receiving downlink signals of the V-band, and uplink signals of the W-band; A plurality of first group subscribers (ONT) comprising a plurality of second group transmitters (Tx) for transmitting a plurality of signals, and a plurality of second group WDM filters for separating optical signals in the V-band and the W-band Network Termination) Including, Additional WDM-PON A third WDM filter located at the OLT side and combining or separating the A-band and the B-band for transmission band extension between the first AWG and the SMF; A fourth WDM filter positioned at the RN side and combining or separating the A-band and the B-band between the second AWG and the SMF; A plurality of fifth group transmitters (Tx), located in the OLT, for transmitting downlink signals in the X-band in the B-band, and a plurality of fifth for receiving uplink signals in the Y-band in the B-band; A plurality of fifth group transceivers (TRx) comprising a group receiver (Rx) and a plurality of fifth group WDM filters for separating optical signals in the X-band and the Y-band; A third AWG located within the OLT and coupled to each of the fifth group WDM filters, for wavelength division multiplexing or demultiplexing a plurality of optical signals; Located at the first group ONT side, a plurality of sixth group receiver (Rx) for receiving the downlink signal of the X-band, a plurality of sixth group transmitter (Tx) for transmitting the uplink signal of the Y-band And a plurality of second group ONTs composed of a plurality of sixth group WDM filters for separating optical signals in the X-band and the Y-band; A fourth portion located in the RN, connected to the fourth WDM filter, connected to each of the sixth group WDM filters by a plurality of second group split optical fibers, and configured to perform wavelength division multiplexing or demultiplexing of the plurality of optical signals; AWG; A wavelength-locked first light source positioned in the OLT and for injecting into the down-signal light source of the V-band and the up-signal light source of the W-band; And A second light source for wavelength locking located within the OLT and for injecting into the down-signal light source of the X-band and the up-signal light source of the Y-band. Including, The wavelength-locked first light source includes a V-band wideband non-coherent light source (V BLS); W-band BLS (W BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the W-band BLS; And seventh and eighth WDM filters connected in parallel with the first circulator and the second circulator. The seventh WDM filter is connected to the first AWG, the eighth WDM filter is connected to the third WDM filter, The wavelength immersing second light source includes an X-band wideband non-coherent light source (X BLS); Y-band BLS (Y BLS); A third circulator coupled to the X-band BLS; A fourth circulator connected to the Y-band BLS; And ninth and tenth WDM filters connected in parallel with the third circulator and the fourth circulator. The ninth WDM filter is connected to the third AWG, and the tenth WDM filter is connected to the third WDM filter. Network structure for broadband transmission. The method of claim 33, And the third WDM filter and the fourth WDM filter are respectively implemented as a third edge filter and a fourth edge filter, or a third bandpass filter and a fourth bandpass filter. The method of claim 33, The third WDM filter has a third pass-through terminal, a third reflecting terminal and a third common terminal, The fourth WDM filter has a fourth pass-through terminal, a fourth reflecting terminal, and a fourth common terminal. The third pass terminal is connected to the eighth WDM filter, the third reflective terminal is connected to the tenth WDM filter, the third common terminal is connected to the SMF, The fourth pass-through terminal is connected to the second AWG, the fourth reflective terminal is connected to the fourth AWG, and the fourth common terminal is connected to the SMF. Network structure for broadband transmission. The method of claim 33, The first group transmitter Tx, the second group transmitter Tx, the fifth group transmitter Tx, and the sixth group transmitter Tx include a Fabry-Perot laser diode of a wavelength band used for transmission. Network structure for wideband transmission in which an FP LD) or a reflective semiconductor optical amplifier (RSOA) is located. The method of claim 35, wherein The third pass terminal and the fourth pass terminal output the A-band, and the third reflecting terminal and the fourth reflecting terminal output the B-band. The method of claim 35, wherein The third pass terminal and the fourth pass terminal output the B-band, and the third reflecting terminal and the fourth reflecting terminal output the A-band. The method according to any one of claims 33 to 38, The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method according to any one of claims 33 to 38, And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method according to any one of claims 33 to 38, The third WDM filter and the fourth WDM filter may be pre-installed for transmission band extension. The method according to any one of claims 33 to 38, And the first AWG and the second AWG have the same FSR, and the third AWG and the fourth AWG also have the same FSR. In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters for transmitting downlink signals of the V-band using the V-band in the existing A-band and the X-band in the B-band as transmission bands (Tx), a plurality of first group receivers (Rx) for receiving an uplink signal of the X-band, and a plurality of first group wavelength division multiplexes for separating optical signals of the V-band and the X-band A plurality of first group transceivers (TRx) configured with a talker (WDM) filter; A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal in the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal in the X-band, and the V-band and the X A plurality of first group subscribers (ONT: Optical Network Termination) consisting of a plurality of second group WDM filters for separating optical signals in the band; And A plurality of first group distribution optical fibers respectively connecting the plurality of first group ONTs to the periodic second AWGs Including, Additional WDM-PON Located at the rear end of the periodic first AWG in the OLT and connected to the periodic first AWG and the first group transceiver (TRx), respectively, to combine or separate the V-band and the X-band; And at least one third group band separation wavelength division multiplexer (BSWDM) filter for combining or separating the W-band in the A-band and the Y-band in the B-band used for transmission band extension; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one third group BSWDM filter, for transmitting downlink signals of the W-band in the A-band, and the B- At least one fourth group receiver (Rx) for receiving an uplink signal of the Y-band in a band, and at least one fourth group WDM filter for separating the optical signals of the W-band and the Y-band; At least one fourth group transceiver (TRx) configured; Located at the rear end of the periodic second AWG in the RN and connected to the periodic second AWG and the first group ONT, respectively, to combine or separate the V-band and the X-band and further to the W; At least one fifth group BSWDM filter for combining or separating the band and the Y-band; At least one sixth group receiver (Rx) for receiving the downlink signal of the W-band in the A-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating the optical signals in the W-band and the Y-band; And At least one second group split optical fiber connecting the at least one fifth group BSWDM filter and the at least one second group ONT, respectively Containing Network structure for broadband transmission. The method of claim 43, The at least one fifth group BSWDM filter is located in front of the first group ONT, is connected to the periodic second AWG by the at least one second group distribution fiber, and the at least one second group ONT Network structure for broadband transmission connected with. The method of claim 43, The at least one third group BSWDM filter, the at least one fourth group transceiver (TRx), the at least one fifth group BSWDM filter, the at least one second group ONT, and the at least one second group distribution Two or more optical fibers are used, Some of said at least two fifth group BSWDM filters are each located at the front end of said first group ONT, and are connected to said periodic second AWG by a corresponding portion of said at least two group distributing optical fibers; Connected with a corresponding part of more than one second group ONT Network structure for broadband transmission. The method of any one of claims 43-45, The at least one third group BSWDM filter each having a third group pass terminal, a third group reflecting terminal and a third group common terminal, Each of the at least one fifth group BSWDM filter has a fifth group pass terminal, a fifth group reflective terminal, and a fifth group common terminal, The third group common terminals are each connected to the periodic first AWG, and the third group pass terminals are respectively connected to the corresponding first group WDM filters, and the third group reflective terminals are each the fourth group. Connected to the WDM filter, The fifth group common terminal is connected to the periodic second AWG, respectively, and the fifth group pass terminal is connected to the corresponding second group WDM filter, respectively, and the fifth group reflective terminal is each of the fourth group WDM. Connected to the filter Network structure for broadband transmission. The method of claim 46, The third group pass terminal and the fifth group pass terminal respectively output the V-band and the X-band, and the third group reflecting terminal and the fifth group reflecting terminal are respectively the W-band and the Y-band. Network structure for wideband transmission outputting bands. The method of claim 46, The third group pass terminal and the fifth group pass terminal respectively output the W-band and the Y-band, and the third group reflecting terminal and the fifth group reflecting terminal are respectively the V-band and the X. Network structure for wideband transmission outputting bands. The method of any one of claims 43-45, The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method of any one of claims 43-45, And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method of any one of claims 43-45, The at least one third BSWDM filter and the at least one fifth BSWDM filter may be pre-installed for transmission band extension. The method of any one of claims 43-45, And wherein the periodic first AWG and the periodic second AWG have the same FSR. In the network structure for broadband transmission using a wavelength band allocation method, The existing wavelength division multiplex passive optical subscriber network (WDM-PON) Located in an optical termination device (OLT), a plurality of first group transmitters for transmitting downlink signals of the V-band using the V-band in the existing A-band and the X-band in the B-band as transmission bands (Tx), a plurality of first group receivers (Rx) for receiving an uplink signal of the X-band, and a plurality of first group wavelength division multiplexes for separating optical signals of the V-band and the X-band A plurality of first group transceivers (TRx) configured with a talker (WDM) filter; A periodic first waveguide array grating (AWG) located within said optical termination device (OLT) for wavelength division multiplexing or demultiplexing a plurality of optical signals; A second second AWG, located in a remote node, for periodic multiplexing or demultiplexing a plurality of optical signals; A single mode fiber (SMF) coupled between the periodic first AWG and the periodic second AWG and transmitting an optical signal multiplexed by the periodic first AWG and the periodic second AWG ; A plurality of second group receivers (Rx) for receiving the downlink signal in the V-band, a plurality of second group transmitters (Tx) for transmitting the uplink signal in the X-band, and the V-band and the X A plurality of first group subscribers (ONTs) configured with a plurality of second group wavelength division multiplexer (WDM) filters for separating optical signals in the band; And A plurality of first group distribution optical fibers respectively connecting the plurality of first group ONTs to the periodic second AWGs Including, Additional WDM-PON Located at the rear end of the periodic first AWG in the OLT and connected to the periodic first AWG and the first group transceiver (TRx), respectively, to combine or separate the V-band and the X-band; And at least one third group band separation wavelength division multiplexer (BSWDM) filter for combining or separating the W-band in the A-band and the Y-band in the B-band used for transmission band extension; At least one fourth group transmitter (Tx), located in the OLT, respectively connected to the at least one three group BSWDM filter, for transmitting downlink signals of the W-band in the A-band, and the B-band At least one fourth group receiver (Rx) for receiving the up-signal of the Y-band within and at least one fourth group WDM filter for separating the optical signals of the W-band and the Y-band At least one fourth group transceiver (TRx); Located at the rear end of the periodic second AWG within the RN and connected to the periodic second AWG and the second group transceiver (TRx), respectively, to combine or separate the V-band and the X-band; And at least one fifth group BSWDM filter for combining or separating the W-band and the Y-band; At least one sixth group receiver (Rx) for receiving the downlink signal of the W-band in the A-band, at least one sixth group transmitter for transmitting an uplink signal of the Y-band in the B-band (Tx), and at least one second group ONT composed of at least one sixth group WDM filter for separating the optical signals in the W-band and the Y-band; At least one second group distribution fiber connecting the at least one fifth group BSWDM filter and the at least one second group ONT, respectively; A seventh BSWDM filter located within the OLT and connected to the periodic first AWG; An eighth BSWDM filter located within the OLT and connected to the SMF; A wavelength-locked first light source positioned in the OLT for injecting into the down-signal light source of the V-band and the up-signal light source of the X-band; And A second light source for wavelength locking located within the OLT and for injecting into the down-signal light source of the W-band and the up-signal light source of the Y-band. Including, The wavelength-locked first light source includes a V-band wideband non-coherent light source (V BLS); X-band BLS (X BLS); A first circulator coupled to the V-band BLS; A second circulator coupled to the X-band BLS; And ninth and tenth WDM filters connected in parallel with the first circulator and the second circulator, The ninth WDM filter is connected to the seventh BSWDM filter, the tenth WDM filter is connected to the eighth BSWDM filter, The wavelength-locked second light source includes a W-band wideband incoherent light source (W BLS); Y-band BLS (Y BLS); A third circulator coupled to the W-band BLS; A fourth circulator connected to the Y-band BLS; And eleventh and twelfth WDM filters connected in parallel with the third and fourth circulators, The eleventh WDM filter is connected to the seventh BSWDM filter, and the twelfth WDM filter is connected to the eighth BSWDM filter. Network structure for broadband transmission. The method of claim 53, The at least one fifth group BSWDM filter is located in front of the first group subscriber, respectively, and is connected to the periodic second AWG by the at least one second group distribution fiber, and the at least one second group Network structure for broadband transmission connected with ONT. The method of claim 53, The at least one third group BSWDM filter, the at least one fourth group transceiver (TRx), the at least one fifth group BSWDM filter, the at least one second group ONT, and the at least one second group distribution Two or more optical fibers are used, Some of said at least two fifth group BSWDM filters are each located at the front end of said first group ONT, and are connected to said periodic second AWG by a corresponding portion of said at least two group distributing optical fibers; Connected with a corresponding part of more than one second group ONT Network structure for broadband transmission. The method of any one of claims 53-55, The at least one third group BSWDM filter having a third pass terminal, a third reflecting terminal and a third common terminal, respectively, Each of the at least one fifth group BSWDM filter has a fifth pass terminal, a fifth reflecting terminal and a fifth common terminal, The seventh BSWDM filter has a seventh pass terminal, a seventh reflective terminal, and a seventh common terminal, The eighth BSWDM filter has an eighth pass terminal, an eighth reflecting terminal, and an eighth common terminal, The third pass-through terminals are respectively connected to the first group WDM filter, the third reflecting terminals are each connected to the at least one fourth group WDM filter, and the third common terminals are each the first periodic AWG. Connected to, The fifth pass-through terminal is connected to the second group WDM filter, respectively, and the fifth reflecting terminal is connected to the at least one sixth group WDM filter, respectively, and the fifth common terminal is connected to the second AWG, respectively. Become, The seventh pass terminal is connected to the ninth WDM filter, the seventh reflective terminal is connected to the eleventh WDM filter, the seventh common terminal is connected to the periodic first AWG, The eighth pass terminal is connected to the tenth WDM filter, the eighth reflective terminal is connected to the twelfth WDM filter, and the eighth common terminal is connected to the SMF. Network structure for broadband transmission. The method of any one of claims 53-55, The first group transmitter Tx, the second group transmitter Tx, the fourth group transmitter Tx, and the sixth group transmitter Tx include a Fabry-Perot laser diode of a wavelength band used for transmission. Network structure for wideband transmission in which an FP LD) or a reflective semiconductor optical amplifier (RSOA) is located. The method of claim 56, wherein The third pass terminal, the fifth pass terminal, the seventh pass terminal, and the eighth pass terminal output the V-band and the X-band, respectively, and the third reflective terminal and the fifth reflective terminal. And the seventh reflecting terminal and the eighth reflecting terminal output the W-band and the Y-band, respectively. The method of claim 56, wherein The third pass terminal, the fifth pass terminal, the seventh pass terminal, and the eighth pass terminal output the W-band and the Y-band, respectively, and the third reflective terminal and the fifth reflective terminal. And the seventh reflecting terminal and the eighth reflecting terminal output the V-band and the X-band, respectively. The method of any one of claims 53-55, The V-band, the W-band, the X-band, and the Y-band are O-bands (1260-1360 nm), E-bands (1360-1460 nm), S-bands (1460-1530 nm) , Network structure for wideband transmission sequentially selected within C-band (1530-1565 nm), L-band (1565-1625 nm), and U-band (1625-1675 nm). The method of any one of claims 53-55, And a number of light sources and subscribers of the existing WDM-PON and the additionally installed WDM-PON can be independently selected. The method of any one of claims 53-55, And the at least one third group BSWDM filter, the at least one fifth group BSWDM filter, the seventh WDM filter, and the eighth WDM filter may be pre-installed for transmission band extension. The method of any one of claims 53-55, And wherein the periodic first AWG and the periodic second AWG have the same FSR.

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