JP2018019253A - Communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication apparatus which performs communications compliant to different standards while switching the communications.SOLUTION: A communication apparatus comprises: a dedicated device in which processing is executed by hardware; and a general-purpose device in which processing is executed by rewritable hardware and software. The dedicated device includes: one or more function execution parts for executing signal processing relating to functions to be used for a part of or all multiple standards upon a received signal; and a function switching control part for controlling whether to operate the function execution parts by outputting a function switching signal corresponding to inputted standard information. The general-purpose device includes: a standard-based function execution part on a standard basis corresponding to any one of the multiple standards and being configured to execute signal processing relating to a function of the corresponding standard on the received signal; and a standard-based function switching part for switching whether to operate a standard-based function execution part corresponding to any standard based on the function switching signal that is inputted from the dedicated device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication device.

  An existing OLT (Optical Line Terminal) is developed, manufactured and used as a separate device for each standard. This is because most of the OLT is composed of dedicated hardware, so that a device with slightly different functions must be developed and manufactured as a separate device. In view of this, it has been considered that the OLT is configured by a programmable logic device (PLD) such as a general-purpose hardware processor (PU) or FPGA (field-programmable gate array). Further, it has been studied to realize a communication device that requires high-speed response and throughput by using an accelerator such as GPGPU (General-purpose computing on graphics processing units).

  In particular, REC (Radio Equipment Controller) that accommodates 10G-EPON (10 Gigabit Ethernet (registered trademark) Passive Optical Network) or NG-PON2 (Next Generation-Passive Optical Network Stage 2), CPRI (Common Public Radio) RECs that accommodate REs (Radio Equipment: radio devices) having an interface (Interface: common public radio interface) are all systems having a throughput of 10 giga, and are expected to be introduced on a large scale in the future. If most of the hardware in these systems is made up of the same hardware and each device can be switched only by rewriting the program, a reduction in capital investment can be expected.

Ohmichi et al., “Development of Communication LSI for 10G-EPON”, SEI Technical Review, No. 180, 2012, p.43-48 Shimazu et al., “Development of LTE base station equipment that can be shared with W-CDMA system”, NTT DOCOMO Technical Journal, Vol.19, No.1, 2011, p.20-25 Oyane et al., “Development of IP base radio base station equipment”, NTT DOCOMO Technical Journal, Vol.15, No.1, 2007, p.8-13 "Common Public Radio Interface (CPRI); Interface Specification", CPRI, CPRI Specification V6.0, 2013 "Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA / CD) Access Method and Physical Layer Specifications", 2008

  As described above, when communication standards are different, communication devices corresponding to these standards are individually developed and manufactured. For this reason, there are cases in which the number of introductions needs to be examined for each communication device, and the development period is prolonged.

  In view of the above circumstances, an object of the present invention is to provide a communication device capable of switching communication based on different standards.

  One aspect of the present invention includes a dedicated device that executes processing by hardware, and a general-purpose device that executes processing by rewritable hardware and software, and the dedicated device includes a lower device or a higher device. One or more function execution units that execute signal processing related to functions used in some or all of a plurality of standards, an external interface unit that receives input of information related to the standards from the outside, and an input to the transmitted signal A function switching control unit that outputs a function switching signal according to information of the standard that has been set and controls whether or not the function execution unit is operated by the function switching signal, and the general-purpose device includes a plurality of the standards A standard that performs signal processing related to the function used in the standard corresponding to the signal transmitted from a lower-level device or a higher-level device. A communication device comprising: a function executing unit according to standards; and a function switching unit according to standards that switches whether to operate the function executing unit according to the standard based on the function switching signal input from the dedicated device It is.

  One aspect of the present invention is the communication apparatus described above, wherein the plurality of standards include a first standard related to a terminal device of a passive optical network using Ethernet (registered trademark) for a transmission frame, and radio control of a common public radio interface. The dedicated device includes a physical layer processing unit having the function execution unit that executes signal processing related to a function of a physical layer used in the first standard, and the function switching control unit includes: , Outputting a function switching signal according to the first standard, operating all the function execution units of the physical layer processing unit, outputting a function switching signal according to the second standard, and the physical layer processing A function execution unit that executes signal processing related to the same function as the function of the second standard among the function execution units included in the unit is operated to execute signal processing related to a function that does not exist in the second standard. The function execution unit is controlled so as not to operate, and the function switching unit according to standard performs signal processing related to a function of a higher layer used in the first standard based on the function switching signal according to the first standard. The standard-specific function execution unit that operates the standard-specific function execution unit to execute signal processing related to the function of the physical layer used in the second standard based on the function switching signal according to the second standard And the function execution for executing the signal processing related to the same function as the function of the second standard by switching the function-specific function execution unit for executing the signal processing related to the function of the higher layer used for the second standard. The unit includes a function execution unit that performs processing related to scrambles and a function execution unit that performs processing related to block codes, and performs signal processing related to functions not in the second standard. The function execution unit that includes a function executing unit that performs processing on error correcting codes.

  One aspect of the present invention is the communication apparatus described above, wherein the plurality of standards include a first standard related to a terminal device of NG-PON2 (Next Generation-Passive Optical Network Stage 2) and radio control of a common public radio interface. The dedicated device includes a physical layer processing unit having the function execution unit that executes signal processing related to a function of a physical layer used in the first standard, and the function switching control unit includes: , Outputting a function switching signal according to the first standard, operating all the function execution units of the physical layer processing unit, outputting a function switching signal according to the second standard, and the physical layer processing The function executing unit that executes signal processing relating to the same function as the function of the second standard among the function executing units included in the unit, and executing signal processing relating to a function that does not exist in the second standard The standard function switching unit performs signal processing related to the function of the higher layer used in the first standard based on the function switching signal according to the first standard. The standard-specific function execution unit that operates the standard-specific function execution unit and executes signal processing related to the function of the physical layer used in the second standard based on the function switching signal according to the second standard; The function execution unit that performs switching so as to operate the function execution unit for each standard that executes signal processing related to functions of higher layers used in two standards and performs signal processing related to the same functions as the functions of the second standard, A function execution unit that performs processing related to scrambling, and the function execution unit that performs signal processing related to a function not included in the second standard includes a function execution unit that performs processing related to an error correction code. The function of the physical layer used for the second standard executed by the standard-specific function execution unit includes a process related to a block code.

  According to the present invention, it is possible to provide a communication device capable of switching communication based on different standards.

It is a block diagram which shows the structure of the terminal station apparatus by the 1st Embodiment of this invention. It is a figure which shows ON / OFF of each function by the function switching signal according to the specification by the embodiment. It is a block diagram which shows the structure of the terminal station apparatus by 2nd Embodiment. It is a block diagram which shows the structure of the terminal station apparatus by 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A communication apparatus according to an embodiment of the present invention includes a dedicated PHY (physical layer) module and a computer server (hereinafter referred to as “server”). The dedicated PHY module is a dedicated device that realizes a function of a physical layer in, for example, OSI (Open Systems Interconnection) by hardware.

  The server is a general-purpose device that realizes various functions by rewritable hardware and software. Note that the communication device according to the embodiment may include a general-purpose device such as a bare metal switch instead of or in addition to the server. The server is configured using a general-purpose programmable device such as a PU (processor) / PLD (programmable logic device). The server has a heterogeneous configuration in which, for example, a central processing unit (CPU), a graphics processing unit (GPU), a field-programmable gate array (FPGA), and the like perform processing in a coordinated manner. And a hard disk, an optical IF (interface), and an SNI (Server Name Indication) for connecting to a higher-level device that is a higher-level communication device. The PU / PLD of the server is provided with a function switching unit classified by standard that executes a branch instruction for device switching. This standard-specific function switching unit can rewrite the functions of a plurality of communication standards (hereinafter referred to as “standards”) by rewriting variables on the memory. In the communication apparatus of the embodiment, execution parts of functions common to a plurality of standards are collected on a dedicated chip in a dedicated PHY module, and the execution parts different for each of the plurality of standards are implemented by PU / PLD so that the hardware is shared. Turn into.

  For example, among a plurality of standards, there are standards having functions such as Reed-Solomon encoding, scrambling, and 64B66B encoding, and standards that do not have. Therefore, the dedicated PHY module selects a necessary function according to the standard to be realized by turning the function ON / OFF.

  For example, a plurality of standards are 10G-EPON (10 Gigabit Ethernet (registered trademark) Passive Optical Network) and CPRI (Common Public Radio Interface) REC (Radio Equipment Controller). . In these PHY processing units, there are many common processes such as scramble and 64B66B codes. Therefore, the PHY processing unit of 10G-EPON and REC are shared by using a PON PHY chip. However, Reed-Solomon encoding is used in 10G-EPON, but not required in REC. Therefore, the PHY processing unit related to Reed-Solomon encoding is switched ON and OFF according to the standard.

  For example, it is assumed that a plurality of standards are NG-PON2 (Next Generation-Passive Optical Network Stage 2) and CPRI REC. In these PHY processing units, scrambling is a common process. Therefore, NG-PON2 and REC PHY processing units are shared by using a PON PHY chip. However, Reed-Solomon encoding is used in NG-PON2, but not in REC. Therefore, the PHY processing unit related to Reed-Solomon encoding is switched ON and OFF according to the standard. Also, since 64B66B encoding is necessary for REC but not for NG-PON2, functions related to 64B66B encoding are implemented in the server.

  Hereinafter, a detailed embodiment of a communication device capable of switching functions of a plurality of standards will be described. Hereinafter, a case where the communication apparatus is an end station apparatus that has an optical interface for communicating with the lower apparatus and relays communication between the upper apparatus and the lower apparatus will be described as an example.

[First embodiment]
FIG. 1 is a block diagram illustrating a configuration of a terminal device 100 according to the first embodiment. The terminal device 100 includes a dedicated PHY module 200 and a general-purpose device 300. The dedicated PHY module 200 communicates with the general-purpose device 300 through an interface (IF) such as PCIe (PC Express).

  The dedicated PHY module 200 is a dedicated device that executes signal processing of functions used for one or more standards by hardware. Hereinafter, a case where the plurality of standards are standard A and standard B will be described. The dedicated PHY module 200 includes an optical / electrical conversion unit 210, an electrical / optical conversion unit 220, a common function mounting unit 230, an external IF unit 240, a function switching control unit 250, and a branching unit 260.

  The optical / electrical conversion unit 210 converts the optical signal received from the lower-level device into an electrical signal and outputs the electrical signal to the common function mounting unit 230. The electrical / optical conversion unit 220 converts the electrical signal input from the common function mounting unit 230 into an optical signal and transmits the optical signal to the lower device. The subordinate device is, for example, an RE (Radio Equipment) having a CPRI interface or an ONU (Optical Network Unit) of a PON (Passive Optical Network).

  The common function implementation unit 230 includes one or more function execution units. The function execution unit included in the common function implementation unit 230 according to the present embodiment is a PHY processing unit that realizes a function of a physical layer used in one or more standards among a plurality of standards. For the common function mounting unit 230, for example, a PON PHY chip on which a PON PHY processing unit is mounted can be used.

  The common function implementation unit 230 shown in the figure includes an S / P (serial / parallel) conversion unit 231, a Reed-Solomon decoding unit 232, a descrambler 233, a 64B66B decoding unit 234, and a 64B66B encoding unit 235 as function execution units. A scrambler 236, a Reed-Solomon encoding unit 237, and a P / S (parallel / serial) conversion unit 238.

  The S / P converter 231 converts the electrical signal converted by the optical / electrical converter 210 from a serial signal to a parallel signal. The Reed-Solomon decoding unit 232 performs a Reed-Solomon code decoding process on the electrical signal input from the optical / electrical conversion unit 210. The Reed-Solomon decoding unit 232 is an example of an error correction decoding unit that performs an error correction code decoding process. The descrambler 233 performs descrambling processing on the electrical signal input from the Reed-Solomon decoding unit 232. The 64B66B decoding unit 234 performs decoding processing of the 64B66B code on the electrical signal input from the descrambler 233 and outputs the result to the general-purpose device 300. The 64B66B decoding unit 234 is an example of a block code decoding unit that performs a block code decoding process.

  The 64B66B encoding unit 235 performs encoding processing of the 64B66B code on the electrical signal input from the general-purpose device 300. The 64B66B encoding unit 235 is an example of a block encoding unit that performs block code encoding processing. The scrambler 236 performs a scramble process on the electric signal input from the 64B66B encoding unit 235. The Reed-Solomon encoding unit 237 performs Reed-Solomon code encoding processing on the electrical signal input from the scrambler 236. The Reed-Solomon encoding unit 237 is an example of an error correction encoding unit that performs an error correction code encoding process. The P / S conversion unit 238 converts the electric signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electric / optical conversion unit 220.

  The external IF unit 240 receives input of information related to the standard from the outside. The function switching control unit 250 outputs a function switching signal according to the standard indicated by the information input to the external IF unit 240. The branching unit 260 branches and inputs the function switching signal to at least some of the function execution units of the common function mounting unit 230. In this embodiment, the branching unit 260 sends function switching signals to the Reed-Solomon decoding unit 232, the descrambler 233, the 64B66B decoding unit 234, the 64B66B encoding unit 235, the scrambler 236, and the Reed-Solomon encoding unit 237, respectively. input. Each function execution unit to which a function switching signal is input has therein a switching unit (not shown) that switches whether to execute the function of the own function unit in accordance with the function switching signal. When the function execution unit does not execute the function of its own function unit, the function execution unit does not perform signal processing on the input communication signal and outputs it to the subsequent stage. As described above, the function switching control unit 250 controls whether to execute each function executing unit by outputting the function switching signal.

  The general-purpose device 300 is realized by a server, a bare metal switch, or the like, and executes processing using rewritable general-purpose hardware and software. The PU / PLD included in the general-purpose device 300 includes a memory 310, a function switching unit 320 according to standard, a standard A upper processing unit 330, a standard A upper IF unit 340, a standard B upper processing unit 350, and a standard B upper An IF unit 360 is mounted.

  The memory 310 stores data. The function switching unit 320 for each standard receives a function switching signal from the dedicated PHY module 200, and switches whether to execute the function performing unit for each standard corresponding to which standard based on the function switching signal. The standard-specific function execution unit executes signal processing of a function necessary for any one of a plurality of standards. The function execution units by standard of standard A are the standard A upper processing unit 330 and the standard A upper IF unit 340, and the function execution units by standard of standard B are the standard B upper processing unit 350 and the standard B upper IF unit 360. is there.

  The standard A upper processing unit 330 performs signal processing of the upper layer of the standard A on the signal. The standard A upper IF unit 340 implements an interface for transmitting and receiving signals to and from the upper device of the standard A. The standard B upper processing unit 350 performs signal processing of the upper layer of the standard B on the signal. The standard B upper IF unit 360 realizes an interface for transmitting and receiving signals to and from the upper apparatus of the standard B.

  The dedicated PHY module 200 provided in the terminal device 100 uses a PHY processing unit that realizes a function common to the REC function among the functions of the chip made for the PON PHY as the REC apparatus. On the other hand, a function portion that is not common to the REC function is switched and executed using a branch instruction by software on the general-purpose device 300 such as a server. Accordingly, a configuration is possible in which one hardware can operate as both a PON and a REC.

  For such a configuration, for example, a chip made exclusively for PON (for example, NG-PON2, 10G-EPON, etc.) is used as the common function mounting unit 230 (PON PHY processing unit). The dedicated PHY module 200 is configured by configuring the board by adding the external IF unit 240, the function switching control unit 250, the branching unit 260, and the like to the common function mounting unit 230.

  Then, an external input is performed to the external IF unit 240 of the dedicated PHY module 200, and a standard used for the terminal device 100 is set. The function switching control unit 250 converts the function into a function switching signal indicating ON / OFF of each function in the common function mounting unit 230 on the hardware side and switching of the software function in the general-purpose device 300 according to the standard obtained. Then, the data is transmitted to each function execution unit (PHY processing unit) in the common function implementation unit 230 and the general-purpose device 300. Each function execution unit switches ON / OFF of the function according to the input function switching signal.

FIG. 2 is a diagram showing ON / OFF of each function by a function switching signal according to the standard.
As shown in the figure, when used as a standard A device, the Reed-Solomon code and scramble functions are ON, and the 64B66B code function is OFF. Therefore, in the case of the function switching signal according to the standard A, the Reed-Solomon encoding unit 237 and the Reed-Solomon decoding unit 232 that are function execution units related to Reed-Solomon codes, and the scrambler 236 and the descrambler that are function execution units related to scrambling. 233 and the function are turned on, and the 64B66B encoding unit 235 and the 64B66B decoding unit 234, which are functional units related to the 64B66B code, turn off the function.

  On the other hand, when used as a standard B device, the Reed-Solomon code function is OFF, and the scramble and 64B66B code functions are ON. Therefore, in the case of a function switching signal according to the standard B, the Reed-Solomon encoding unit 237 and the Reed-Solomon decoding unit 232, which are function execution units related to Reed-Solomon code, turn off the functions, and the scrambler is a function execution unit related to scrambling. 236 and the descrambler 233, and the 64B66B encoding unit 235 and the 64B66B decoding unit 234, which are functional units related to the 64B66B code, turn on the functions.

  Regarding the signal processing of the upper layer, there are many portions where the processing differs for each standard. The function switching signal output from the function switching control unit 250 is sent to the general-purpose device 300. The general-purpose device 300 uses a software branch instruction to switch functions related to higher-layer signal processing, and selects which standard upper-layer function signal processing is to be executed. In the terminal device 100 shown in FIG. 1, the standard A or the standard B is selected.

Hereinafter, the operation of the terminal device 100 will be described.
First, a case where the terminal device 100 is operated as a standard A device will be described.
When the standard A information is input to the external IF unit 240 of the terminal device 100, the function switching control unit 250 outputs a function switching signal corresponding to the standard A. The branching unit 260 inputs the function switching signal to the Reed-Solomon decoding unit 232, the descrambler 233, the 64B66B decoding unit 234, the 64B66B encoding unit 235, the scrambler 236, and the Reed-Solomon encoding unit 237. The Reed-Solomon decoding unit 232, the descrambler 233, the scrambler 236, and the Reed-Solomon encoding unit 237 turn on the function according to the input function switching signal. The 64B66B decoding unit 234 and the 64B66B encoding unit 235 turn off the function according to the input function switching signal. Further, the branching unit 260 inputs a function switching signal to the general-purpose device 300. The function switching unit 320 according to the standard of the general-purpose apparatus 300 performs function switching using a software branch instruction in accordance with the input function switching signal. The function switching unit 320 by standard sets the standard A upper processing unit 330 among the standard A upper processing unit 330 and the standard B upper processing unit 350 as a switching destination.

When transmitting / receiving the main signal, the terminal device 100 operates as follows.
When the dedicated PHY module 400 of the terminal device 100 receives a signal from a lower-level device of the standard A, the optical / electrical converter 210 converts the received upstream signal from an optical signal to an electrical signal, and sends it to the S / P converter 231. Output. The S / P conversion unit 231 converts the upstream signal converted into the electrical signal converted by the optical / electrical conversion unit 210 from a serial signal into a parallel signal, and outputs it to the Reed-Solomon decoding unit 232. The Reed-Solomon decoding unit 232 performs Reed-Solomon code decoding processing on the upstream signal of the parallel signal input from the S / P conversion unit 231 and outputs the result to the descrambler 233. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232, and outputs the descramble process to the 64B66B decoding unit 234. The 64B66B decoding unit 234 outputs the uplink signal input from the descrambler 233 to the general-purpose device 300 as it is.

  The memory 310 of the general-purpose device 300 buffers the upstream signal input from the 64B66B decoding unit 234. The standard-specific function switching unit 320 reads the buffered uplink signal from the memory 310 and outputs it to the standard A upper processing unit 330. The standard A upper processing unit 330 performs upper layer processing on the upstream signal of the standard A on the upstream signal input from the function switching unit 320 by standard, and outputs the processed signal to the standard A upper IF unit 340. The standard A upper IF unit 340 outputs the upstream signal input from the standard A upper processing unit 330 to the higher device of the standard A.

  When the standard A upper IF unit 340 included in the general-purpose device 300 of the terminal device 100 receives a downlink signal from the upper device, the standard A upper IF unit 340 outputs the received signal to the standard A upper processing unit 330. The standard A upper processing unit 330 performs upper layer processing on the downstream signal of the standard A on the downstream signal input from the standard A upper IF unit 340 and outputs the processed signal to the function switching unit 320 for each standard. The function switching unit 320 according to standard buffers the downlink signal input from the standard A upper processing unit 330 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 200.

  The 64B66B encoding unit 235 of the dedicated PHY module 200 outputs the downlink signal input from the general-purpose device 300 to the scrambler 236 as it is. The scrambler 236 scrambles the downlink signal input from the 64B66B encoding unit 235 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 performs a Reed-Solomon code encoding process on the downstream signal input from the scrambler 236 and outputs the result to the P / S conversion unit 238. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal and transmits the converted signal to the lower-level device of the standard A.

Next, a case where the terminal device 100 is operated as a standard B device will be described.
When the standard B information is input to the external IF unit 240 of the terminal device 100, the function switching control unit 250 outputs a function switching signal corresponding to the standard B. The branching unit 260 outputs the function switching signal to the Reed-Solomon decoding unit 232, the descrambler 233, the 64B66B decoding unit 234, the 64B66B encoding unit 235, the scrambler 236, and the Reed-Solomon encoding unit 237. The descrambler 233, the 64B66B decoding unit 234, the 64B66B encoding unit 235, and the scrambler 236 turn on the function according to the input function switching signal. The Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 turn off the function according to the input function switching signal. Further, the branching unit 260 inputs a function switching signal to the general-purpose device 300. The function switching unit 320 according to the standard of the general-purpose apparatus 300 performs function switching using a software branch instruction in accordance with the input function switching signal. The function switching unit 320 by standard sets the standard B upper processing unit 350 among the standard A upper processing unit 330 and the standard B upper processing unit 350 as a switching destination.

When transmitting / receiving the main signal, the terminal device 100 operates as follows.
When the dedicated PHY module 200 of the terminal device 100 receives a signal from a lower-level device of the standard B, the optical / electrical converter 210 converts the received upstream signal from an optical signal to an electrical signal, and sends it to the S / P converter 231. Output. The S / P conversion unit 231 converts the upstream signal converted into the electrical signal converted by the optical / electrical conversion unit 210 from a serial signal into a parallel signal, and outputs it to the Reed-Solomon decoding unit 232. The Reed-Solomon decoding unit 232 outputs the uplink signal of the parallel signal input from the S / P conversion unit 231 as it is to the descrambler 233. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232, and outputs the descramble process to the 64B66B decoding unit 234. The 64B66B decoding unit 234 performs a 64B66B code decoding process on the uplink signal input from the descrambler 233 and outputs the decoded signal to the general-purpose device 300.

  The memory 310 of the general-purpose device 300 buffers the upstream signal input from the 64B66B decoding unit 234. The standard-specific function switching unit 320 reads the buffered uplink signal from the memory 310 and outputs it to the standard B upper processing unit 350. The standard B upper processing unit 350 performs upper layer processing on the input upstream signal for the standard B upstream signal, and outputs the processed signal to the standard B upper IF unit 360. The standard B higher IF unit 360 outputs the upstream signal input from the standard B higher processing unit 350 to the higher device of the standard B.

  The standard B upper IF unit 360 included in the general-purpose device 300 of the terminal device 100 receives the downlink signal from the upper device and outputs the signal to the standard B upper processing unit 350. The standard B upper processing unit 350 performs upper layer processing on the downlink signal of the standard B on the downlink signal input from the standard B upper IF unit 360 and outputs the processed signal to the function switching unit 320 for each standard. The standard-specific function switching unit 320 buffers the downlink signal input from the standard B upper processing unit 350 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 200.

  The 64B66B encoding unit 235 of the dedicated PHY module 200 performs encoding processing of the 64B66B code on the downlink signal input from the general-purpose device 300 and outputs the result to the scrambler 236. The scrambler 236 scrambles the downlink signal input from the 64B66B encoding unit 235 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 outputs the downlink signal input from the scrambler 236 to the P / S conversion unit 238 as it is. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal, and transmits the converted signal to the lower-level device of the standard B.

  According to the present embodiment described above, the dedicated component and the server perform the function switching according to the standard, so that the terminal devices of a plurality of standards are shared. In other words, the terminal device 100 that communicates with a plurality of communication systems of different standards performs the common functions of each communication system with the dedicated PHY module 200 that is dedicated hardware, and functions that are not common to a plurality of standards are servers and the like. This is realized by software implementation in a general-purpose device 300 composed of general-purpose hardware and software.

  The function switching control unit 250 of the dedicated PHY module 200 transmits a function switching signal to each function execution unit based on the information input from the external IF unit 240, and sets the function ON / OFF. This function switching signal is input to the general-purpose device 300. Based on the function switching signal, the standard-specific function switching unit 320 of the general-purpose device 300 switches the function on the software using a branch instruction. As described above, the terminal device 100 has a function of sharing the function switching signal between the dedicated PHY module 200 and the general-purpose device 300. Thereby, the terminal device 100 can switch the signal processing of a plurality of standards with one hardware.

[Second Embodiment]
In the present embodiment, the terminal equipment of two standards of 10G-EPON OLT, which is a gigabit class PON using Ethernet (registered trademark) as a transmission frame, and REC of CPRI line bit rate option 8, are shared. The terminal device of this embodiment is a configuration example in which a PON PHY chip developed for 10G-EPON is diverted to the REC function.

  FIG. 3 is a block diagram showing the configuration of the terminal device 101 of this embodiment. In the figure, the same parts as those of the terminal device 100 shown in FIG. The terminal device 101 includes a dedicated PHY module 400 and a general-purpose device 500. The dedicated PHY module 400 and the general-purpose device 500 communicate with each other through an IF such as PCIe.

  The dedicated PHY module 400 is a dedicated device that executes PHY processing of functions used in 10G-EPON by hardware. The dedicated PHY module 400 includes an optical / electrical conversion unit 210, an electrical / optical conversion unit 220, a PON PHY processing unit 430, an external IF unit 240, a PON / REC switching control unit 450, and a branching unit 460. .

  The PON PHY processing unit 430 is an example of a common function implementation unit, and includes one or more function execution units. The function execution unit provided in the PON PHY processing unit 430 is a PHY processing unit that realizes the function of the physical layer in 10G-EPON. The PON PHY processing unit 430 may be a PON PHY chip on which a 10G-EPON PHY processing unit is mounted. The PON PHY processing unit 430 shown in the figure includes, as function execution units, an S / P conversion unit 231, a Reed-Solomon decoding unit 232, a descrambler 233, a 64B66B decoding unit 234, a 64B66B encoding unit 235, a scrambler 236, A Reed-Solomon encoding unit 237 and a P / S conversion unit 238 are provided.

  The PON / REC switching control unit 450 outputs a function switching signal corresponding to either 10G-EPON or REC according to the information input to the external IF unit 240. Here, this function switching signal is a PON / REC switching signal. The branching unit 460 branches and inputs the PON / REC switching signal to at least some of the function execution units of the PON PHY processing unit 430. In the present embodiment, the branching unit 460 inputs the PON / REC switching signal to each of the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. A switching unit (not shown) included in the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 to which the PON / REC switching signal is input determines whether or not to execute the function of its own function unit in accordance with the PON / REC switching signal. Switch. Thus, the PON / REC switching control unit 450 controls whether to execute each function execution unit by outputting the PON / REC switching signal.

  The general-purpose device 500 is realized by a server, a bare metal switch, or the like, and executes processing using rewritable general-purpose hardware and software. The PU / PLD included in the general-purpose device 500 includes a memory 310, a function switching unit by standard 520, a REC PHY processing unit 531, a memory 532, a REC MAC (Medium Access Control) processing unit 533, A PON MAC processing unit 550 is mounted. The general-purpose device 500 further includes an upper IF unit 540 and an upper IF unit 560. The REC PHY processing unit 531, the memory 532, the REC MAC processing unit 533, and the upper IF unit 540 correspond to REC, and the PON MAC processing unit 550 and the upper IF unit 560 correspond to 10G-EPON.

  The REC PHY processing unit 531 is mounted on an accelerator such as an FPGA and performs REC PHY processing. The REC PHY processing unit 531 performs cyclic prefix removal, FFT (Fast Fourier Transform), resource demapping, Receive processing (reception processing), and turbo decoding on the uplink signal. In addition, the REC PHY processing unit 531 performs turbo coding, QAM (Quadrature Phase Amplitude Modulation) precoding, resource mapping, IFFT (Fast Inverse Fourier Transform), and cyclic prefix insertion in the downlink signal. The memory 532 temporarily stores the signal. The REC MAC processing unit 533 performs REC MAC processing (upper layer signal processing) on the signal. The host IF unit 540 implements an interface for transmitting and receiving signals to and from the host device of the REC. The PON MAC processing unit 550 performs 10G-EPON MAC processing (upper layer signal processing) on the signal. The host IF unit 560 implements an interface for transmitting and receiving signals to and from the host device of 10G-EPON.

  The dedicated PHY module 400 provided in the terminal device 101 above diverts a common function part with the REC function to the REC apparatus among the functions of the chip made for the 10G-EPON OLT PHY. On the other hand, regarding functions that are not common to REC, the functions are switched and executed using a branch instruction by software on a general-purpose device 500 such as a server. As described above, the terminal device 101 is configured to be able to operate as a 10G-EPON OLT or as a REC by a single piece of hardware combining dedicated hardware and a general-purpose device such as a server.

  For such a configuration, as the PON PHY processing unit 430, for example, a chip made for 10G-EPON OLT is used. The dedicated PHY module 400 is configured by adding the external IF unit 240, the PON / REC switching control unit 450, the branching unit 460, and the like to the chip to configure the board.

  Then, an external input to the external IF unit 240 of the dedicated PHY module 400 is performed, and ON / OFF of the function execution unit related to the Reed-Solomon code is switched by an arbitrarily set PON / REC switching signal. In 10G-EPON, the functions of Reed-Solomon code, scramble, and 64B66B code are standardized. On the other hand, in the REC CPRI apparatus, the functions of scramble and 64B66B codes are standardized. Therefore, the function execution unit related to the Reed-Solomon code turns the function on in the case of the PON function, and turns off the function in the case of the REC function.

  The function switching unit 520 according to the standard of the general-purpose device 500 receives the PON / REC switching signal and switches functions using a software branch instruction. In the case of the PON function, the standard-specific function switching unit 520 transmits / receives data to / from the PON MAC processing unit 550 and performs processing on the server. On the other hand, in the case of the REC function, the standard-specific function switching unit 520 transmits / receives data to / from the REC PHY processing unit 531 and performs processing by an accelerator such as an FPGA.

Next, the operation of the terminal device 101 will be described.
First, a case where the terminal device 101 is operated as a 10G-EPON OLT will be described.
When information for operating as a 10G-EPON OLT is input to the external IF unit 240 of the terminal device 101, the PON / REC switching control unit 450 outputs a PON / REC switching signal corresponding to 10G-EPON. . The branching unit 460 inputs the PON / REC switching signal to the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. The Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 turn on the function according to the input PON / REC switching signal. Further, the branching unit 460 inputs a PON / REC switching signal to the general-purpose device 500. The function switching unit 520 according to the standard of the general-purpose device 500 performs function switching using a software branch instruction in accordance with the input PON / REC switching signal. The standard-specific function switching unit 520 uses the PON MAC processing unit 550 as a switching destination.

When transmitting / receiving the main signal, the terminal device 101 operates as follows.
The dedicated PHY module 200 of the terminal device 101 receives an upstream signal from the ONU. The optical / electrical conversion unit 210 converts the received upstream signal from an optical signal into an electrical signal, and the S / P conversion unit 231 converts the upstream signal converted into the electrical signal from a serial signal into a parallel signal. The Reed-Solomon decoding unit 232 performs a Reed-Solomon code decoding process on the upstream signal converted into the parallel signal and outputs the result to the descrambler 233. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232, and outputs the descramble process to the 64B66B decoding unit 234. The 64B66B decoding unit 234 performs a 64B66B code decoding process on the uplink signal input from the descrambler 233 and outputs the decoded signal to the general-purpose device 500.

  The memory 310 of the general-purpose device 500 buffers the upstream signal input from the 64B66B decoding unit 234. The standard function switching unit 520 reads the buffered uplink signal from the memory 310 and outputs it to the PON MAC processing unit 550. The PON MAC processing unit 550 performs 10G-EPON uplink MAC processing on the uplink signal input from the standard function switching unit 520 and outputs the result to the upper IF unit 560. Upper IF section 560 outputs the upstream signal input from PON MAC processing section 550 to the upper apparatus.

  When the host IF unit 560 included in the general-purpose device 500 of the terminal device 101 receives a downlink signal from the host device, the host IF unit 560 outputs the downlink signal to the PON MAC processing unit 550. The PON MAC processing unit 550 performs 10G-EPON downlink MAC processing on the downlink signal, and outputs the result to the function switching unit 520 according to the standard. The function switching unit by standard 520 buffers the downstream signal input from the PON MAC processing unit 550 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 400.

  The 64B66B encoding unit 235 of the dedicated PHY module 400 performs 64B66B code encoding processing on the downlink signal input from the general-purpose device 300 and outputs the result to the scrambler 236. The scrambler 236 scrambles the downlink signal input from the 64B66B encoding unit 235 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 performs Reed-Solomon code encoding processing on the downlink signal input from the scrambler 236 and outputs the result to the P / S conversion unit 238. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal and transmits it to the ONU.

Next, a case where the terminal device 101 is operated as a REC device will be described.
When information for operating as a REC is input to the external IF unit 240 of the terminal device 101, the PON / REC switching control unit 450 outputs a PON / REC switching signal corresponding to the REC. The branching unit 460 inputs the PON / REC switching signal to the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. The Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 turn off the function according to the input PON / REC switching signal. Further, the branching unit 460 inputs a PON / REC switching signal to the general-purpose device 500. The function switching unit 520 according to the standard of the general-purpose device 500 performs function switching using a software branch instruction in accordance with the input PON / REC switching signal. The standard-specific function switching unit 520 sets the REC PHY processing unit 531 as a switching destination.

When transmitting / receiving the main signal, the terminal device 101 operates as follows.
The dedicated PHY module 200 of the terminal device 101 receives an uplink signal from the RE. The optical / electrical conversion unit 210 converts the received upstream signal from an optical signal into an electrical signal, and the S / P conversion unit 231 converts the upstream signal converted into the electrical signal from a serial signal into a parallel signal. The Reed-Solomon decoding unit 232 outputs the upstream signal converted into the parallel signal to the descrambler 233 as it is. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232, and outputs the descramble process to the 64B66B decoding unit 234. The 64B66B decoding unit 234 performs a 64B66B code decoding process on the uplink signal input from the descrambler 233 and outputs the decoded signal to the general-purpose device 500.

  The memory 310 of the general-purpose device 500 buffers the upstream signal input from the 64B66B decoding unit 234. The standard function switching unit 520 reads the buffered uplink signal from the memory 310 and outputs it to the REC PHY processing unit 531. The REC PHY processing unit 531 performs REC PHY processing such as cyclic prefix removal and FFT, resource demapping, Receive processing, and turbo decoding on the input uplink signal. The memory 532 buffers the upstream signal that has been subjected to PHY processing by the REC PHY processing unit 531. The REC MAC processing unit 533 performs the REC uplink MAC processing (upper layer signal processing) on the uplink signal buffered in the memory 532, and outputs the result to the upper IF unit 540. Upper IF section 540 outputs the uplink signal input from REC MAC processing section 533 to the upper apparatus.

  When receiving the downlink signal from the higher-level device, the higher-level IF unit 540 included in the general-purpose device 500 of the terminal device 101 outputs the received signal to the REC MAC processing unit 533. The REC MAC processing unit 533 performs REC downlink MAC processing on the downlink signal. The memory 532 buffers the downlink signal that has been subjected to the MAC processing by the REC MAC processing unit 533. The REC PHY processing unit 531 inserts turbo coding, QAM precoding, resource mapping, IFFT, and cyclic prefix into the downlink signal read from the memory 532, and outputs the result to the standard-specific function switching unit 520. The function switching unit by standard 520 buffers the downlink signal input from the REC PHY processing unit 531 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 400.

  The 64B66B encoding unit 235 of the dedicated PHY module 400 performs 64B66B code encoding processing on the downlink signal input from the general-purpose device 300 and outputs the result to the scrambler 236. The scrambler 236 scrambles the downlink signal input from the 64B66B encoding unit 235 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 outputs the downlink signal input from the scrambler 236 to the P / S conversion unit 238 as it is. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal and transmits it to the RE.

  According to the present embodiment, it is possible to share the terminal equipment of two standards of OLT of 10G-EPON and REC of CPRI line bit rate option 8.

[Third Embodiment]
In the present embodiment, the terminal equipments of the two standards of NG-PON2 OLT and CPRI line bit rate option 8 REC are shared. The terminal station apparatus of this embodiment is an example of a configuration in which a PON PHY chip developed for NG-PON 2 is diverted to the REC function.

  FIG. 4 is a block diagram showing the configuration of the terminal device 102 of this embodiment. In the figure, the same parts as those of the terminal device 101 shown in FIG. The terminal device 102 includes a dedicated PHY module 600 and a general-purpose device 700. The dedicated PHY module 600 and the general-purpose device 700 communicate with each other through an IF such as PCIe.

  The dedicated PHY module 600 is a dedicated device that executes PHY processing of functions used for the NG-PON 2 by hardware. The dedicated PHY module 600 includes an optical / electrical conversion unit 210, an electrical / optical conversion unit 220, a PON PHY processing unit 630, an external IF unit 240, a PON / REC switching control unit 650, and a branching unit 660. .

  The PON PHY processing unit 630 is an example of a common function implementation unit, and includes one or more function execution units. The function execution unit provided in the PON PHY processing unit 630 is a PHY processing unit that realizes the function of the physical layer in the NG-PON 2. As the PON PHY processing unit 630, a PON PHY chip on which the NG-PON 2 PHY processing unit is mounted can be used. The PON PHY processing unit 630 shown in the figure includes an S / P conversion unit 231, a Reed-Solomon decoding unit 232, a descrambler 233, a scrambler 236, a Reed-Solomon encoding unit 237, and a P / S conversion unit as function execution units. 238.

  The PON / REC switching control unit 650 outputs a function switching signal corresponding to either NG-PON 2 or REC according to the information input to the external IF unit 240. Here, this function switching signal is a PON / REC switching signal. The branching unit 660 branches and inputs the PON / REC switching signal to at least some of the function execution units of the PON PHY processing unit 630. In this embodiment, the branching unit 660 inputs a PON / REC switching signal to each of the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. A switching unit (not shown) included in the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 to which the PON / REC switching signal is input determines whether or not to execute the function of its own function unit in accordance with the PON / REC switching signal. Switch. In this way, the PON / REC switching control unit 650 controls whether to execute each function execution unit by outputting the PON / REC switching signal.

  The general-purpose device 700 is realized by a server, a bare metal switch, or the like, and executes processing using rewritable general-purpose hardware and software. The PU / PLD included in the general-purpose device 700 includes a memory 310, a function switching unit by standard 720, a REC PHY processing unit 731, a memory 532, a REC MAC processing unit 533, an upper IF unit 540, and a PON MAC processing unit. 750 and an upper IF unit 760. The REC PHY processing unit 731, the memory 532, the REC MAC processing unit 533, and the upper IF unit 540 correspond to REC, and the PON MAC processing unit 750 and the upper IF unit 760 correspond to NG-PON2.

  The REC PHY processing unit 731 is mounted on an accelerator such as an FPGA and performs REC PHY processing. The REC PHY processing unit 731 performs 64B66B code decoding processing, cyclic prefix removal and FFT, resource demapping, Receive processing, and turbo decoding on the uplink signal. Further, the REC PHY processing unit 731 performs turbo coding, QAM precoding, resource mapping, IFFT and cyclic prefix insertion, and 64B66B code coding processing on the downlink signal. The PON MAC processing unit 750 performs NG-PON2 MAC processing (upper layer signal processing) on the signal. The host IF unit 760 implements an interface for transmitting and receiving signals to and from the host device of NG-PON2.

  The dedicated PHY module 600 included in the terminal station device 102 diverts a common function unit with the REC function to the REC device among the functions of the chip made for the PHY of the NG-PON 2 OLT. On the other hand, with respect to a portion of the function that is not common to the REC, the function is switched and executed by using a software branch instruction in the general-purpose device 700 on the server or the like. As described above, the terminal device 102 is configured to be able to operate as an NG-PON2 OLT or as a REC by a single piece of hardware combining dedicated hardware and a general-purpose device such as a server.

  For such a configuration, as the PON PHY processing unit 630, for example, a chip made for NG-PON2 OLT is used. By adding an external IF unit 240, a PON / REC switching control unit 650, and a branching unit 660 to this chip, a dedicated PHY module 600 is configured by configuring a board.

  Then, an external input to the external IF unit 240 of the dedicated PHY module 600 is performed, and ON / OFF of the function execution unit related to the Reed-Solomon code is switched by an arbitrarily set PON / REC switching signal. In NG-PON2, Reed-Solomon codes and scramble functions are standardized. On the other hand, in the REC CPRI apparatus, the functions of scramble and 64B66B codes are standardized. Therefore, the function execution unit related to the Reed-Solomon code turns the function on in the case of the PON function, and turns off the function in the case of the REC function.

  The function switching unit 720 by standard of the general-purpose device 700 receives the PON / REC switching signal and switches functions using a software branch instruction. In the case of the PON function, the standard-specific function switching unit 720 transmits / receives data to / from the PON MAC processing unit 750 and performs processing on the server. On the other hand, in the case of the REC function, the standard-specific function switching unit 720 transmits / receives data to / from the REC PHY processing unit 731 and performs processing by an accelerator such as an FPGA.

Next, the operation of the terminal device 102 will be described.
First, a case where the terminal device 102 is operated as an OLT of the NG-PON 2 will be described.
When information for operating as an NG-PON2 OLT is input to the external IF unit 240 of the terminal device 102, the PON / REC switching control unit 650 outputs a PON / REC switching signal corresponding to NG-PON2. . The branching unit 660 inputs the PON / REC switching signal to the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. The Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 turn on the function according to the input PON / REC switching signal. Further, the branching unit 660 inputs a PON / REC switching signal to the general-purpose device 700. The function switching unit 720 according to the standard of the general-purpose device 700 performs function switching using a software branch instruction in accordance with the input PON / REC switching signal. The function switching unit by standard 720 sets the PON MAC processing unit 750 as a switching destination.

When transmitting / receiving a main signal, the terminal device 102 operates as follows.
The dedicated PHY module 600 of the terminal device 102 receives an upstream signal from the ONU. The optical / electrical conversion unit 210 converts the received upstream signal from an optical signal into an electrical signal, and the S / P conversion unit 231 converts the upstream signal converted into the electrical signal from a serial signal into a parallel signal. The Reed-Solomon decoding unit 232 performs a Reed-Solomon code decoding process on the upstream signal converted into the parallel signal and outputs the result to the descrambler 233. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232 and outputs the result to the general-purpose device 700.

  The memory 310 of the general-purpose device 700 buffers the upstream signal input from the descrambler 233. The standard function switching unit 720 reads the buffered uplink signal from the memory 310 and outputs it to the PON MAC processing unit 750. The PON MAC processing unit 750 performs upstream MAC processing of NG-PON 2 on the input upstream signal, and outputs the result to the upper IF unit 760. Upper IF section 760 outputs the upstream signal input from PON MAC processing section 750 to the upper apparatus.

  When receiving the downstream signal from the host device, the host IF unit 760 included in the general-purpose device 700 of the terminal device 102 outputs the signal to the PON MAC processing unit 750. The PON MAC processing unit 750 performs the downlink MAC processing of NG-PON2 on the downlink signal and outputs it to the function switching unit 720 by standard. The function switching unit by standard 720 buffers the downlink signal input from the PON MAC processing unit 750 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 600.

  The scrambler 236 of the dedicated PHY module 600 performs a scramble process on the downlink signal input from the general-purpose device 300 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 performs Reed-Solomon code encoding processing on the downlink signal input from the scrambler 236 and outputs the result to the P / S conversion unit 238. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal and transmits it to the ONU.

Next, a case where the terminal device 102 is operated as a REC device will be described.
When information for operating as a REC is input to the external IF unit 240 of the terminal device 102, the PON / REC switching control unit 650 outputs a PON / REC switching signal corresponding to the REC. The branching unit 660 inputs the PON / REC switching signal to the Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237. The Reed-Solomon decoding unit 232 and the Reed-Solomon encoding unit 237 turn off the function according to the input PON / REC switching signal. Further, the branching unit 660 inputs a PON / REC switching signal to the general-purpose device 700. The function switching unit 720 according to the standard of the general-purpose device 700 performs function switching using a software branch instruction in accordance with the input PON / REC switching signal. The function switching unit by standard 720 sets the REC PHY processing unit 731 as a switching destination.

When transmitting / receiving a main signal, the terminal device 102 operates as follows.
The dedicated PHY module 600 of the terminal device 102 receives the uplink signal from the RE. The optical / electrical conversion unit 210 converts the received upstream signal from an optical signal into an electrical signal, and the S / P conversion unit 231 converts the upstream signal converted into the electrical signal from a serial signal into a parallel signal. The Reed-Solomon decoding unit 232 outputs the upstream signal converted into the parallel signal to the descrambler 233 as it is. The descrambler 233 performs descrambling on the upstream signal input from the Reed-Solomon decoding unit 232 and outputs the result to the general-purpose device 700.

  The memory 310 of the general-purpose device 700 buffers the upstream signal input from the descrambler 233. The standard function switching unit 720 reads the buffered uplink signal from the memory 310 and outputs it to the REC PHY processing unit 731. The REC PHY processing unit 731 performs REC PHY processing such as 64B66B code decoding processing, cyclic prefix removal and FFT, resource demapping, Receive processing, and turbo decoding on the input uplink signal. The memory 532 buffers the uplink signal that has been subjected to PHY processing by the REC PHY processing unit 731. The REC MAC processing unit 533 performs the REC uplink MAC processing (upper layer signal processing) on the uplink signal buffered in the memory 532, and outputs the result to the upper IF unit 540. Upper IF section 540 outputs the uplink signal input from REC MAC processing section 533 to the upper apparatus.

  When receiving the downstream signal from the higher-level device, the higher-level IF unit 540 included in the general-purpose device 700 of the terminal station device 102 outputs the received signal to the REC MAC processing unit 533. The REC MAC processing unit 533 performs REC downlink MAC processing on the downlink signal. The memory 532 buffers the downlink signal that has been subjected to the MAC processing by the REC MAC processing unit 533. The REC PHY processing unit 731 performs turbo encoding, QAM precoding, resource mapping, IFFT and cyclic prefix insertion, 64B66B code encoding processing on the downlink signal read from the memory 532, and a function switching unit according to the standard. Output to 720. The standard function switching unit 720 buffers the downlink signal input from the REC PHY processing unit 731 in the memory 310. The memory 310 outputs the buffered downlink signal to the dedicated PHY module 600.

  The scrambler 236 of the dedicated PHY module 600 performs a scramble process on the downlink signal input from the general-purpose device 300 and outputs the result to the Reed-Solomon encoding unit 237. The Reed-Solomon encoding unit 237 outputs the downlink signal input from the scrambler 236 to the P / S conversion unit 238 as it is. The P / S conversion unit 238 converts the downstream signal input from the Reed-Solomon encoding unit 237 from a parallel signal to a serial signal, and outputs the converted signal to the electrical / optical conversion unit 220. The electrical / optical conversion unit 220 converts the downstream signal of the serial signal input from the P / S conversion unit 238 from an electrical signal to an optical signal and transmits it to the RE.

  According to the present embodiment, it is possible to share the terminal equipment of two standards, that is, NG-PON2 OLT and CPRI line bit rate option 8 REC.

  According to the embodiment described above, the communication device (for example, the terminal device 100, 101, or 102 described above) executes processing by using a dedicated device that executes processing by hardware, and rewritable hardware and software. A general-purpose device. The dedicated device includes one or more function execution units that perform signal processing related to functions used for some or all of the plurality of standards on a signal transmitted from a lower-level device or a higher-level device, and a standard from the outside. An external interface unit that receives input of information on the function, a function switching control unit that outputs a function switching signal according to the input standard information, and controls whether or not each function execution unit is operated by the function switching signal; Is provided. The general-purpose device corresponds to one of a plurality of standards, and a signal transmitted from a lower-level device or a higher-level device is subjected to a plurality of standards for each standard that performs signal processing related to functions used in the corresponding standard. A function execution unit; and a standard-specific function switching unit that switches which standard-specific function execution unit corresponding to which standard is operated based on a function switching signal input from a dedicated device.

  The plurality of standards may include a first standard related to a terminal device of a passive optical network using Ethernet (registered trademark) for a transmission frame and a second standard related to a radio control device of a common public radio interface. The dedicated device includes a physical layer processing unit (for example, a PON PHY processing unit 430) having a plurality of function execution units that execute signal processing related to functions of the physical layer used in the first standard. When the first standard is input from the external interface unit, the function switching control unit of the dedicated device outputs a function switching signal according to the first standard and operates all the function execution units of the physical layer processing unit. Control. On the other hand, when the second standard is input from the external interface unit, the function switching control unit outputs a function switching signal according to the second standard, and the function of the second standard among the function execution units of the physical layer processing unit. The function execution unit that executes signal processing related to the same function as that in the second standard is operated, and the function execution unit that executes signal processing related to a function not in the second standard is controlled not to operate. Signal processing related to the same function as that of the second standard includes processing related to block codes such as scramble and 64B66B encoding, and signal processing related to a function not included in the second standard includes processing of error correction codes such as Reed-Solomon code. Including. When receiving a function switching signal according to the first standard, the function switching unit by standard of the general-purpose device operates a function executing unit by standard that executes signal processing of an upper layer corresponding to the first standard. On the other hand, when the function switching signal according to the second standard is received, the function switching unit according to standard includes a function executing unit according to standard that executes signal processing related to the function of the physical layer corresponding to the second standard, and the second standard. A function-specific function executing unit that executes signal processing related to the function of the corresponding higher layer is operated. Upper layer signal processing includes MAC processing.

  In addition, the plurality of standards may include a first standard related to the terminal station device of NG-PON 2 and a second standard related to the radio control device of the common public radio interface. The dedicated device includes a physical layer processing unit (for example, a PON PHY processing unit 630) having a plurality of function execution units that execute signal processing related to functions of the physical layer used in the first standard. When the first standard is input from the external interface unit, the function switching control unit of the dedicated device outputs a function switching signal according to the first standard and operates all the function execution units of the physical layer processing unit. Control. On the other hand, when the second standard is input from the external interface unit, the function switching control unit outputs a function switching signal according to the second standard, and the function of the second standard among the function execution units of the physical layer processing unit. The function execution unit that executes signal processing related to the same function as that in the second standard is operated, and the function execution unit that executes signal processing related to a function not in the second standard is controlled not to operate. The signal processing related to the same function as the function of the second standard includes processing related to scrambling, and the signal processing related to the function not included in the second standard includes processing of error correction code such as Reed-Solomon code. When receiving a function switching signal according to the first standard, the function switching unit by standard of the general-purpose device operates a function executing unit by standard that executes signal processing of an upper layer corresponding to the first standard. On the other hand, when the function switching signal according to the second standard is received, the function switching unit according to standard includes a function executing unit according to standard that executes signal processing related to the function of the physical layer corresponding to the second standard, and the second standard. A special function execution unit that executes signal processing related to the function of the corresponding higher layer is operated. The upper layer signal processing includes, for example, MAC processing. The functions of the physical layer used for the second standard executed by the function-specific function execution unit include processing related to block codes.

  According to the embodiment described above, the communication device can perform communication based on these different communication standards while sharing a lot of hardware for different communication standards. For example, the communication device can provide the REC device and the 10G-EPON OLT function, or the REC device and the NG-PON 2 OLT function by a single piece of hardware. Therefore, it is possible to reduce the unit price of the apparatus and to improve the efficiency of capital investment and maintenance.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  The present invention can be applied to a communication device that performs communication conforming to a plurality of standards.

100, 101, 102 ... Terminal station devices 200, 400, 600 ... Dedicated PHY module 210 ... Optical / electrical converter 220 ... Electric / optical converter 230 ... Common function implementation unit 231 ... S / P converter 232 ... Reed-Solomon decoding Scrambler 233 ... descrambler 234 ... 64B66B decoder 235 ... 64B66B encoder 236 ... scrambler 237 ... Reed-Solomon encoder 238 ... P / S converter 238
240 ... external IF unit 250 ... function switching control unit 260,460,660 ... branching units 300, 500, 700 ... general-purpose device 310 ... memory 320, 520,720 ... specific function switching unit 330 ... standard A upper processing unit 340 ... Standard A upper IF unit 350 ... Standard B upper IF processing unit 360 ... Standard B upper IF unit 430, 630 ... PON PHY processing unit 450,650 ... PON / REC switching control unit 531, 731 ... REC PHY processing unit 532 ... Memory 533 ... REC MAC processing unit 540, 560, 760 ... upper IF unit 550, 750 ... PON MAC processing unit

Claims (3)

A dedicated device that performs processing by hardware; and
A general-purpose device that executes processing using rewritable hardware and software,
The dedicated device is
One or more function execution units that execute signal processing related to functions used for some or all of a plurality of standards on a signal transmitted from a lower apparatus or an upper apparatus;
An external interface that receives information on the standard from the outside;
A function switching control unit that outputs a function switching signal according to the information of the input standard and controls whether the function execution unit is operated by the function switching signal;
The general-purpose device is:
Corresponding to any of a plurality of standards, a function execution unit by standard for each standard that executes signal processing related to the function used for the standard corresponding to the signal transmitted from a lower apparatus or an upper apparatus,
A standard-specific function switching unit that switches whether to operate the standard-specific function execution unit corresponding to which standard based on the function switching signal input from the dedicated device;
A communication device. The plurality of standards include a first standard related to a terminal device of a passive optical network using Ethernet (registered trademark) for a transmission frame, and a second standard related to a radio control device of a common public radio interface,
The dedicated device is
A physical layer processing unit having the function execution unit for executing signal processing related to the function of the physical layer used in the first standard;
The function switching control unit outputs a function switching signal according to the first standard, operates all the function execution units included in the physical layer processing unit, and outputs a function switching signal according to the second standard. Then, a function execution unit that executes signal processing related to the same function as the function of the second standard among the function execution units included in the physical layer processing unit is operated to execute signal processing related to a function that is not in the second standard Control the function execution unit not to operate,
The standard-specific function switching unit operates the standard-specific function execution unit that executes signal processing related to a function of an upper layer used in the first standard, based on the function switching signal according to the first standard, Based on the function switching signal according to the second standard, the function execution unit for each standard that executes signal processing related to the function of the physical layer used in the second standard and the function of the higher layer used in the second standard Switch to operate the standard-specific function execution unit that executes signal processing related to
The function execution unit that executes signal processing related to the same function as the function of the second standard includes a function execution unit that performs processing related to scramble, and a function execution unit that performs processing related to block codes,
The function execution unit that executes signal processing related to a function not in the second standard includes a function execution unit that performs processing related to an error correction code.
The communication apparatus according to claim 1. The plurality of standards include a first standard related to a terminal device of NG-PON2 (Next Generation-Passive Optical Network Stage 2) and a second standard related to a radio control device of a common public radio interface,
The dedicated device is
A physical layer processing unit having the function execution unit for executing signal processing related to the function of the physical layer used in the first standard;
The function switching control unit outputs a function switching signal according to the first standard, operates all the function execution units included in the physical layer processing unit, and outputs a function switching signal according to the second standard. Then, a function execution unit that executes signal processing related to the same function as the function of the second standard among the function execution units included in the physical layer processing unit is operated to execute signal processing related to a function that does not exist in the second standard Control the function execution unit not to operate,
The standard-specific function switching unit operates the standard-specific function execution unit that executes signal processing related to a function of an upper layer used in the first standard, based on the function switching signal according to the first standard, Based on the function switching signal according to the second standard, the function execution unit for each standard that executes signal processing related to the function of the physical layer used in the second standard and the function of the higher layer used in the second standard Switch to operate the standard-specific function execution unit that executes signal processing related to
The function execution unit that executes signal processing related to the same function as the function of the second standard includes a function execution unit that performs processing related to scrambling,
The function execution unit that executes signal processing related to a function not in the second standard includes a function execution unit that performs processing related to an error correction code,
The function of the physical layer used for the second standard executed by the function-specific function execution unit includes processing related to a block code,
The communication apparatus according to claim 1.

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