WO2016108640A1 - Unité de nœud comportant un moteur de mise en file d'attente pour la diffusion groupée de données ethernet, et système d'antennes réparties la comportant - Google Patents

Unité de nœud comportant un moteur de mise en file d'attente pour la diffusion groupée de données ethernet, et système d'antennes réparties la comportant Download PDF

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Publication number
WO2016108640A1
WO2016108640A1 PCT/KR2015/014514 KR2015014514W WO2016108640A1 WO 2016108640 A1 WO2016108640 A1 WO 2016108640A1 KR 2015014514 W KR2015014514 W KR 2015014514W WO 2016108640 A1 WO2016108640 A1 WO 2016108640A1
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Prior art keywords
ethernet data
node
unit
mac module
remote unit
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PCT/KR2015/014514
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English (en)
Korean (ko)
Inventor
김도윤
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주식회사 쏠리드
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Priority claimed from KR1020150026054A external-priority patent/KR102386123B1/ko
Application filed by 주식회사 쏠리드 filed Critical 주식회사 쏠리드
Priority to US15/540,638 priority Critical patent/US10523452B2/en
Publication of WO2016108640A1 publication Critical patent/WO2016108640A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

Definitions

  • the present invention relates to a distributed antenna system, and more particularly, to a node unit including a queuing engine for multicasting Ethernet data and a distributed antenna system including the same.
  • a distributed antenna system mainly plays a role of relaying a macro radio base station signal of a mobile communication service provider, but recently, one of additional functions is LTE / 3G small cell and Wi-Fi.
  • the Ethernet protocol is used, supporting the functionality of an acceptable backhaul transport network.
  • the distributed antenna system with high system complexity uses the Ethernet protocol with high throughput and reliability as an interface of the C & M channel. As such, the use of Ethernet in distributed antenna systems is becoming increasingly common.
  • the distributed antenna system provides an Ethernet interface between the Master Unit and dozens of Remote Units, and between cascaded remote units, and L2 switches outside of the Field Programmable Gate Array (FPGA). You use a device such as Layer 2 Switch to control the path of Ethernet data.
  • FPGA Field Programmable Gate Array
  • Ethernet interfaces with dozens of links have 10 pin assigns for Media Independent Interface (MII) and 18 pin assigns for Gigabit MII (GMII), even if clock and control signals are excluded. There is a problem that is difficult to implement in hardware, such as).
  • MII Media Independent Interface
  • GMII Gigabit MII
  • the present invention provides a node unit including a queuing engine (QUEUING ENGINE) for multicasting Ethernet data, which efficiently provides an Ethernet interface in a distributed antenna system and enables hardware simplification of a digital board, and a distributed antenna system including the same. I would like to.
  • a queuing engine for multicasting Ethernet data
  • a node unit connected to a plurality of lower nodes, comprising: a media access control (MAC) module; And a queuing engine for interfacing Ethernet data between the MAC module and the plurality of lower nodes, wherein the queuing engine multicasts the Ethernet data received from the MAC module to the plurality of lower nodes.
  • a buffer configured to transmit Ethernet data received from a lower node of the buffer to the MAC module, and to buffer the Ethernet data received from the plurality of lower nodes and output the buffered Ethernet data to the MAC module.
  • the queuing engine may be implemented in a field programmable gate array (FPGA) constituting a digital part of the node unit.
  • FPGA field programmable gate array
  • the buffer may be a first-in first-out buffer.
  • the FIFO buffer may have a size larger than twice the full frame length of the Ethernet data.
  • the Ethernet data may be a control / management signal transmitted from or to an external management device connected to the node unit.
  • the queuing engine may further include signal control logic that determines that Ethernet data received from the MAC module is valid when the TX_EN signal is at the first level, and drops invalid Ethernet data.
  • the queuing engine may further include signal control logic that determines that Ethernet data received from the plurality of lower nodes is valid when the RX_DV signal is at a first level, and drops invalid Ethernet data. .
  • the queuing engine may further include a scheduler configured to determine whether the Ethernet data is valid when the Ethernet data is input from the buffer, and to output the Ethernet data determined to be valid to the MAC module. Can be.
  • the scheduler may determine that the Ethernet data received from the MAC module is valid when the TX_EN signal is at the first level, and drop the invalid Ethernet data.
  • the scheduler may determine that the Ethernet data received from the plurality of lower nodes is valid when the RX_DV signal is at the first level, and drop the invalid Ethernet data.
  • a node unit cascaded with an upper node and a lower node comprising: a media access control (MAC) module; And a queuing engine for interfacing Ethernet data between the MAC module, the upper node, and the lower node, wherein the queuing engine multicasts the Ethernet data received from the upper node to the MAC module and the lower node. And multicast the Ethernet data received from the lower node to the MAC module and the upper node, multicast the Ethernet data received from the MAC module to the upper node and the lower node, and the upper node or the lower node.
  • MAC media access control
  • the node unit comprising: a third buffer for output to the parent node is provided.
  • the queuing engine may be implemented in a field programmable gate array (FPGA) constituting a digital part of the node unit.
  • FPGA field programmable gate array
  • the buffer may be a first-in first-out buffer.
  • the FIFO buffer may have a size larger than twice the full frame length of the Ethernet data.
  • the Ethernet data may be a control / management signal transmitted from or to an external management device connected to the node unit.
  • the queuing engine may further include a first scheduler that determines whether the Ethernet data input from the first buffer is valid and outputs the Ethernet data determined to be valid to the MAC module. have.
  • the queuing engine may further include a second scheduler that determines whether the Ethernet data input from the second buffer is valid and outputs the Ethernet data determined to be valid to the lower node. have.
  • the queuing engine may further include a third scheduler that determines whether the Ethernet data input from the third buffer is valid and outputs the Ethernet data determined to be valid to the upper node. have.
  • the master unit And a plurality of remote units connected to the master unit, wherein at least some of the plurality of remote units include a remote unit cascaded with an upper remote unit and a lower remote unit, wherein the master unit includes: a master unit MAC (Media Access Control) module and a master unit queuing engine for interfacing Ethernet data between the master unit MAC module and the plurality of remote units, wherein the master unit queuing engine is an Ethernet received from the master unit MAC module.
  • MAC Media Access Control
  • Multicasting data to the plurality of remote units transferring Ethernet data received from the plurality of remote units to the master unit MAC module, and buffering Ethernet data received from the plurality of remote units to the master unit MAC module Contains the buffer to be written to
  • the cascaded remote unit includes a remote unit MAC module, and a remote unit queuing engine for interfacing Ethernet data between the remote unit MAC module, the upper remote unit, and the lower remote unit. Multicasting the Ethernet data received from the upper remote unit to the remote unit MAC module and the lower remote unit, and multicasting the Ethernet data received from the lower remote unit to the remote unit MAC module and the upper remote unit.
  • a distributed antenna system including a third buffer buffering Ethernet data received from a module and outputting the buffer to the upper remote unit.
  • an Ethernet interface can be efficiently provided in a distributed antenna system.
  • the cost savings are due to the hardware simplification of the digital board and the absence of external devices such as L2 switches.
  • FIG. 1 is a diagram illustrating a topology of a distributed antenna system as one type of a signal distributed transmission system to which the present invention may be applied.
  • FIG. 2 is a block diagram of one embodiment of a master unit in a distributed antenna system to which the present invention may be applied.
  • FIG. 3 is a block diagram of a variation example in which signal control logic is additionally applied to the master unit of FIG. 2.
  • FIG. 4 is a block diagram of one embodiment of a remote unit in a distributed antenna system to which the present invention can be applied.
  • one component when one component is referred to as “connected” or “connected” with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that, unless there is an opposite substrate, it may be connected or connected via another component in the middle.
  • the embodiment of the present invention may be similarly or similarly applied to other signal distributed transmission systems such as a base station distributed system in addition to a distributed antenna system.
  • FIG. 1 is a diagram illustrating a topology of a distributed antenna system as one type of a signal distributed transmission system to which the present invention may be applied.
  • a distributed antenna system (DAS) 1 includes a base station interface unit (BIU) 100 constituting a headend node of a distributed antenna system. , A master unit (MU) 200, an extension node (HUB) 300, and a plurality of remote units (RU) 400 disposed at respective service locations of the remote. It includes.
  • BIU base station interface unit
  • MU master unit
  • UOB extension node
  • RU remote units
  • the distributed antenna system 1 may be implemented as an analog DAS or a digital DAS, and in some cases, may be implemented as a hybrid thereof (that is, some nodes perform analog processing and other nodes perform digital processing).
  • FIG. 1 shows an example of a topology of a distributed antenna system 1, where the distributed antenna system 1 has an installation area and application fields (eg, in-building, subway, hospital). (Hospital, Stadium, etc.) can be modified in various ways in consideration of the specificity.
  • application fields eg, in-building, subway, hospital.
  • the number of the base station interface unit 100, the master unit 200, the hub 300, the remote unit 400 and the connection relationship between the upper and lower ends may be different from FIG.
  • the hub 200 is utilized when the number of branches to be branched from the master unit 200 to the star structure is limited compared to the number of remote units 400 that need to be installed. do. Therefore, when the single master unit 200 alone can sufficiently cover the number of remote units 400 that need to be installed, or when a plurality of master units 200 are installed, the hub 200 may include a distributed antenna system 1. May be omitted.
  • the base station interface unit 100 serves as an interface between the BTS (Basestation Transceiver System) such as a base station and the master unit 200 in the distributed antenna system 1.
  • BTS Basestation Transceiver System
  • FIG. 1 illustrates a case where a plurality of BTSs are connected to a single base station interface unit 100, the base station interface unit 100 may be provided separately for each operator, for each frequency band, and for each sector.
  • the base station interface unit 100 is generally suitable for processing such a high power RF signal in the master unit 200. It converts the power into an RF signal and delivers it to the master unit 200.
  • the base station interface unit 100 after receiving the signal of the mobile communication service for each frequency band (or for each operator, sector) as shown in Figure 1 and combine (combine) The transfer to the master unit 200 may also be performed.
  • the base station interface unit 100 When the base station interface unit 100 lowers the high power signal of the BTS to low power, and then combines each mobile communication service signal to the master unit 200, the master unit 200 is combined and transmitted mobile communication service signal. It plays a role of distributing (hereinafter referred to as relay signal) by branch.
  • the distributed antenna system 1 when the distributed antenna system 1 is implemented as a digital DAS, the base station interface unit 100 may convert a high power RF signal of a BTS into a low power RF signal, and a low power RF signal to an IF signal ( After converting into an intermediate frequency signal, a digital signal may be processed and separated into units that combine them.
  • the master unit 200 combines each relayed signal and distributes it for each branch. Can be performed. A detailed functional configuration of the master unit 200 will be described later in detail with reference to FIG. 2.
  • the combined relay signal distributed from the master unit 200 is directly or through the hub 300 to branch stars (see Branch 1, ... Branch k, ... Branch N in FIG. 1). It is delivered to the remote unit 400.
  • Each remote unit 400 separates the received combined relay signal for each frequency band and performs signal processing (analog signal processing in the case of analog DAS and digital signal processing in the case of digital DAS).
  • each remote unit 400 transmits a relay signal to the user terminal in its service coverage through the service antenna.
  • a detailed functional configuration of the remote unit 400 will be described later in detail with reference to FIG. 4.
  • an RF cable is connected between the BTS and the base station interface unit 100 and between the base station interface unit 100 and the master unit 200, and from the master unit 200 to the lower end thereof, all with an optical cable.
  • the signal transport medium between each node can be various other variations.
  • the base station interface unit 100 and the master unit 200 may be connected through an RF cable, but may also be connected through an optical cable or a digital interface.
  • an optical cable is connected between the master unit 200 and the hub 300 and the remote unit 400 directly connected to the master unit 200, and an RF cable between the cascade connected remote units 400 is provided. Connection may be via twisted cable, UTP cable, or the like.
  • the remote unit 400 directly connected to the master unit 200 may also be connected through an RF cable, a twist cable, a UTP cable, or the like.
  • the master unit 200, the hub 300, and the remote unit 400 may include an optical transceiver module for all-optical conversion / photoelectric conversion, and when connected between nodes with a single optical cable
  • a Wavelength Division Multiplexing (WDM) device may be included.
  • the distributed antenna system 1 may be connected to an external management device (network management server or system (NMS) of FIG. 1) through a network, so that an administrator may remotely access each node of the distributed antenna system 1 through the NMS. It is possible to monitor the status and problem of each node and to control the operation of each node remotely, in which the control / management signals for controlling the operation of each node are high throughput and high reliability Ethernet protocol (Ethernet).
  • the distributed antenna system 1 may not only serve to relay a wireless base station signal of a mobile communication service provider, but also a backhaul that may accommodate LTE / 3G small cell and Wi-Fi. Ethernet protocol can be used while supporting the function of backhaul) transport network.
  • FIG. 2 is a block diagram of one embodiment of a master unit in a distributed antenna system to which the present invention may be applied.
  • FIG. 2 illustrates one implementation of a master unit 200 in a digital DAS where the node-to-node connection is via an optical cable.
  • a queuing engine for transmitting Ethernet data is applied.
  • the queuing engine according to the embodiment of the present invention may be implemented in the digital part of the master unit 200.
  • the queuing engine may be implemented in the FPGA.
  • the master unit 200 includes a Media Access Control (MAC) module 210, an FPGA 220 constituting a digital part, and a plurality of E / O converters 230. do.
  • MAC Media Access Control
  • the MAC module 210 performs addressing and channel access control functions.
  • the FPGA 220 includes a queuing engine 221 and a plurality of framers / serdes 222 connected to the queuing engine 221.
  • the queuing engine 221 serves to interface Ethernet data between the MAC module 210 and the plurality of framers / susdes 222.
  • the plurality of framers / surdess 222 may be configured to correspond to the plurality of remote units 400 constituting lower nodes of the master unit 200. That is, the plurality of framers / sudes 222 may exist as branch stars (see FIG. 1).
  • the queuing engine 221 When receiving the Ethernet data from the MAC module 210, the queuing engine 221 stores a plurality of Ethernet data received from the MAC module 210 (without decoding the Ethernet data and referring to a destination address field). Broadcast to the framer / surdes 222.
  • the framer / surdes 222 formats the Ethernet data received from the queuing engine 221 into a format suitable for digital transmission, and converts the parallel digital signal into a serial digital signal.
  • the optical / electric converter 230 converts the digital signal received from the framer / surdes 222 into an optical signal and transmits the optical signal to the remote unit 400 through the optical cable.
  • each remote unit 400 is a destination address of the Ethernet data. Does not accept it unless it is itself, so there is no problem of reduced throughput.
  • each optoelectric converter 230 converts an optical signal received from the remote unit 400 through an optical cable into a digital signal, thereby converting the framer / surface.
  • the framer / surdes 222 converts the serial digital signal into a parallel digital signal and reformats it into a format suitable for processing according to frequency bands.
  • the queuing engine 221 transfers the Ethernet data received from each framer / surface 222 to the MAC module 210.
  • the remote unit 400 Since the remote unit 400 transmits Ethernet data to the upper node when responding to the request of the master unit 200 or when there is alarm information when an abnormality occurs, the remote unit 400 corresponds to each remote unit 400. There is no need to guarantee a dedicated link for carrying Ethernet data between each framer / sudth 222 and the MAC module 210.
  • the queuing engine 221 may determine the validity of the data received from the framer / surdes 222 when a link for transferring Ethernet data between the framer / surface 222 and the MAC module 210 is already occupied. It may include a configuration for outputting valid data to the MAC module 210 in order.
  • the queuing engine 221 may include one or more receiving buffers 221-2 and a scheduler 221-1.
  • the reception buffer 221-2 may input Ethernet data received from the remote unit 400 of the lower node to the scheduler 221-1.
  • the scheduler 221-1 may determine validity of data received from one or more RX BUFFERs 221-2, and output valid data to the MAC module 210.
  • the scheduler 221-1 may output the data received from the reception buffer 221-2 to the MAC module 210 according to an input order, including a first-in first-out (FIFO) buffer.
  • FIFO first-in first-out
  • the reception buffer 221-2 may also be configured as a FIFO buffer.
  • the reception buffer 221-2 may be configured as a FIFO buffer having a sufficient size more than twice the full frame length of the Ethernet data.
  • the reception buffer 221-2 is appropriate according to the required throughput. It may also consist of a FIFO buffer of size.
  • FIG. 2 illustrates a case in which the framer and the sudes are configured as a single unit, but the framer and the sudes may be separately configured in each unit as necessary.
  • FIG. 3 is a block diagram of a variation example in which signal control logic is additionally applied to the master unit of FIG. 2.
  • the queuing engine 221 may include signal control logic 221-3.
  • the signal control logic 221-3 may be a component provided separately in the queuing engine 221 or a component implemented in the scheduler 221-1 described with reference to FIG. 2.
  • the signal control logic 221-3 determines whether the Ethernet data received from the MAC module 210 or from the framer / surface 222 is valid data, and if it is valid, multicasts to the framer / surface 222. It may transfer to the MAC module 210.
  • the signal control logic 221-3 may be configured such that the TX_EN signal from the MAC module 210 is at a first level (eg, high), and / or from the framer / susdes 222.
  • the signal control logic 221-3 drops the received Ethernet data and does not multicast to the next framer / surface 222 or pass it to the MAC module 210. .
  • the signal control logic 221-3 is configured in the transmitting end and the receiving end of the queuing engine 221, respectively, but may be configured as a single logic connected to the transmitting end and the receiving end as necessary. As described above, the control logic 221-3 may be configured in the scheduler 221-1.
  • FIG. 4 is a block diagram of one embodiment of a remote unit in a distributed antenna system to which the present invention can be applied.
  • the block diagram of FIG. 4 illustrates one implementation of a remote unit 400 in a digital DAS where the node-to-node connection is via an optical cable.
  • the block diagram of FIG. 4 illustrates a remote unit 400 cascaded with a remote unit at a higher stage and a remote unit at a lower stage.
  • a queuing engine for transmitting Ethernet data is applied.
  • the queuing engine applied to the remote unit 400 of the middle stage of FIG. 4 may be equally applied to the remote unit of the upper stage and / or the remote unit of the lower stage.
  • the queuing engine according to an embodiment of the present invention may be implemented in the digital part of the remote unit 400. If an FPGA is applied to configure the digital part of the remote unit 400, the queuing engine can be implemented within that FPGA.
  • the remote unit 400 includes a media access control (MAC) module 410, a field programmable gate array (FPGA) 420 constituting a digital part, and a plurality of photoelectric converters. 430, 440. Reference numerals 430 and 440 are used to distinguish between the opto-electric converter connected to the remote unit (Upper RU) of the upper stage and the opto-electric converter connected to the remote unit (Lower RU) of the lower stage.
  • MAC media access control
  • FPGA field programmable gate array
  • the MAC module 410 performs addressing and channel access control functions.
  • the FPGA 420 includes a queuing engine 421 and a plurality of framer / serdes 422 and 423 connected to the queuing engine 421.
  • the queuing engine 421 serves to interface Ethernet data between the MAC module 410 and the plurality of framers / surdes 422 and 423.
  • the framer / surface 422 is configured to correspond to a remote unit (Upper RU) constituting an upper node of the remote unit 400, and the framer / surface 423 constitutes a lower node of the remote unit 400. It may be configured to correspond to the remote unit (Lower RU).
  • the optical / electric converter 440 converts the optical signal received from the remote unit of the upper node through the optical cable into a digital signal and transmits the digital signal to the framer / surde 422. do.
  • the framer / surdes 422 converts the serial digital signal into a parallel digital signal and reformats it into a format suitable for processing according to frequency bands.
  • the queuing engine 421 multicasts the Ethernet data received from the framer / surface 422 to the MAC module 410 and to the remote unit of the lower node.
  • the framer / surdes 423 formats the Ethernet data received from the queuing engine 421 into a format suitable for digital transmission, and converts the parallel digital signal into a serial digital signal.
  • the opto-electric converter 430 converts the digital signal received from the framer / surdes 423 into an optical signal and transmits the digital signal to the remote unit of the lower node through the optical cable.
  • the optical / electric converter 430 converts the optical signal received from the remote unit of the lower node through the optical cable into a digital signal and transmits the digital signal to the framer / surde 423. do.
  • the framer / surdes 423 converts the serial digital signal into a parallel digital signal and reformats it into a format suitable for processing according to frequency bands.
  • the queuing engine 421 multicasts the Ethernet data received from the framer / surface 423 to the remote unit of the MAC module 410 and the higher node.
  • the framer / surdes 422 formats the Ethernet data received from the queuing engine 421 into a format suitable for digital transmission, and converts the parallel digital signal into a serial digital signal.
  • the optical / electric converter 440 converts the digital signal received from the framer / surface 422 into an optical signal and transmits the optical signal to the remote unit of the upper node through the optical cable.
  • the queuing engine 421 When receiving Ethernet data from the MAC module 410, the queuing engine 421 multicasts the received Ethernet data to the remote unit of the upper node and / or the remote unit of the lower node.
  • the framer / surdes 422 formats the Ethernet data received from the queuing engine 421 into a format suitable for digital transmission, and converts the parallel digital signal into a serial digital signal.
  • the optical / electric converter 440 converts the digital signal received from the framer / surface 422 into an optical signal and transmits the optical signal to the remote unit of the upper node through the optical cable.
  • the framer / surdes 423 formats the Ethernet data received from the queuing engine 421 into a format suitable for digital transmission, and converts the parallel digital signal into a serial digital signal.
  • the opto-electric converter 430 converts the digital signal received from the framer / surdes 423 into an optical signal and transmits the digital signal to the remote unit of the lower node through the optical cable.
  • the queuing engine 421 receives a message received from the framer / therdes 422 and 423 when a link for transferring Ethernet data between the MAC module 410 and the plurality of framers / therdes 422 and 423 is already occupied. It may include a configuration for determining the validity of the data, and outputs the valid data to the MAC module 410 in order.
  • the queuing engine 421 may include schedulers 421-1, 421-2, and 421-3, a local buffer 421-4, a receive buffer 421-5, and an outgoing buffer 421-6.
  • the schedulers 421-1, 421-2, and 421-3 may be configured as local schedulers 421-1, Tx schedulers 421-2, and Rx schedulers according to the link direction. 421-3 may be separated.
  • the schedulers 421-1, 421-2, and 421-3 may determine validity of data received from the connected one or more buffers 421-4, 421-5, and / or 421-6, and output valid data. have.
  • the local scheduler 421-1 may determine the validity of data received from the local buffer 421-4 and output valid data to the MAC module 410.
  • the originating scheduler 421-2 may determine validity of the data received from the originating buffer 421-6, and output valid data to the framer / surface 423.
  • the operation of determining the validity of the received data by the schedulers 421-1, 421-2, and 421-3 is the same as or similar to the operation described with reference to FIG. 3, and thus a detailed description thereof will be omitted.
  • the schedulers 421-1, 421-2, and 421-3 are received from one or more buffers 421-4, 421-5 and / or 421-6 that are connected, including first-in first-out buffers. Data may be output to the MAC module 210 in the order of input, but embodiments of the present invention are not limited thereto.
  • the local buffer 421-4, the reception buffer 421-5, and / or the outgoing buffer 421-6 may be configured as first-in first-out (FIFO) buffers. It is not limited. Similar to the scheduler 221-1 and the reception buffer 221-2 of the master unit 200 described with reference to FIG. 2, the components 421-1 and 421-2. 421-3 of the queuing engine 421. , 421-4, 421-5, and 421-6 may include a plurality of and / or sufficient sized FIFO buffers to prevent loss of Ethernet data.
  • FIFO first-in first-out
  • the local scheduler 421-1 can output Ethernet data received from the connected upper and / or lower remote units to the local scheduler 421-1.
  • the local scheduler 421-1 may output the received Ethernet data to the MAC module 410.
  • the local scheduler 421-1 and / or the local buffer 421-4 may be configured as a FIFO buffer, but embodiments of the present invention are not limited thereto.
  • the originating buffer 421-6 may output the Ethernet data received from the connected upper node and / or the MAC module 410 to the originating scheduler 421-2, and the originating scheduler 421-2 may receive the received Ethernet. Data can be output to lower nodes.
  • the reception buffer 421-5 may output the Ethernet data received from the connected lower node and / or the MAC module 410 to the reception scheduler 421-3, and the reception scheduler 421-3 may receive the received data. Ethernet data can be output to the parent node.
  • the buffer included in each of the elements 421-1, 421-2, 421-3, 421-4, 421-5, and 421-6 may include a FIFO buffer of an appropriate size according to the required throughput.
  • the queuing engine 421 may input the Ethernet data received from the remote unit of the upper node to the local scheduler 421-1 and / or the originating scheduler 421-2. At this time, the Ethernet data received from the remote unit of the upper node may be input to the local scheduler 421-1 through the local buffer 421-4, and the originating scheduler 421-2 through the originating buffer 421-6. ) Can be entered.
  • the local buffer 421-4 may sequentially output the input Ethernet data and transmit it to the local scheduler 421-1.
  • the queuing engine 421 may input the Ethernet data received from the remote unit of the lower node to the local scheduler 421-1 and / or the reception scheduler 421-3. At this time, the Ethernet data received from the remote unit of the lower node may be input to the local scheduler 421-1 through the local buffer 421-4, and the receive scheduler 421-3 through the receive buffer 421-5. Can be entered.
  • the transmission buffer 421-6 may sequentially output the input Ethernet data and transmit it to the transmission scheduler 421-2.
  • the queuing engine 421 may input the Ethernet data received from the MAC module 410 to the transmission scheduler 421-2 and / or the reception scheduler 421-3. At this time, the Ethernet data received from the MAC module 410 may be input to the reception scheduler 421-3 through the reception buffer 421-5, and the source scheduler 421-2 through the transmission buffer 421-6. ) Can be entered. The reception buffer 421-5 may sequentially output the input Ethernet data and transmit it to the reception scheduler 421-3.
  • the local scheduler 421-1 may determine validity of the data, and sequentially output valid data to the MAC module 410.
  • the originating scheduler 421-2 may determine validity of the data, sequentially output valid data, and transmit the valid data to the framer / subdes 423 corresponding to the remote unit of the lower node.
  • the reception scheduler 421-3 may determine the validity of the data, and sequentially output valid data to the framer / subdes 422 corresponding to the remote unit of the upper node.
  • the queuing engine 421 of the remote unit 400 buffers the Ethernet data received from the upper node or the lower node and outputs the buffered data to the MAC module 400 (local scheduler 421-1 and local). Buffer 421-4). In addition, the queuing engine 421 of the remote unit 400 buffers the Ethernet data received from the upper node or the MAC module 400 and outputs the second configuration (sending scheduler 421-2 and the outgoing buffer) to the lower node. 421-6)). In addition, the queuing engine 421 of the remote unit 400 buffers and outputs Ethernet data received from the lower node or the MAC module 400 to the upper node (receive scheduler 421-3 and receive buffer 421). -5)).
  • FIG. 4 illustrates a case in which the framer and the sudes are configured as a single unit, the framer and the sudes may be separately configured in each unit as necessary.
  • the remote unit 400 of FIG. 4 provides a service signal to a terminal in a service area and processes a terminal signal received from a terminal in the service area, a digital-to-analog converter (DAC), an up converter, a PAU (
  • the apparatus may further include components such as a power amplification unit (LNA), a low noise amplifier (LNA), a down converter, and an analog / digital converter (ADC).
  • LNA power amplification unit
  • LNA low noise amplifier
  • ADC analog / digital converter
  • the queuing engine 221 of the master unit 200 includes only the reception buffer 221-2 and does not include the transmission buffer.
  • the queuing engine 221 of the master unit 200 is ( The configuration may be the same as or similar to that of the queuing engine 421 of the remote unit 400 (described with reference to FIG. 4).
  • the master unit 200 may operate similarly to the remote unit 400.
  • any master unit 200 of the plurality of master units 200 may be operated as if it is a lower node or a higher node to the other master unit 200.
  • the hub 300 may also include a queuing engine.
  • the queuing engine included in the hub 300 may include the same or similar configuration as the queuing engine 421 of the remote unit 400 (described with reference to FIG. 4).
  • the queuing engine 421 of the remote unit 400 has a configuration for transmitting the NMS data to the lower node. May be omitted.
  • the queuing engine 421 of the remote unit 400 inputs the Ethernet data from the originating buffer 421-6, the originating scheduler 421-2, and the lower node that receives the Ethernet data from the MAC module 410.
  • the receiving local buffer 421-4 may not be included.
  • the remote unit 400 may be designed to enable additional installation of the Ethernet port.
  • the queuing engine 421 of the remote unit 400 may include a plurality of framers / surdes 423 corresponding to lower nodes.
  • the queuing engine 421 of the remote unit 400 may include a plurality of local buffers 421-4 and / or a reception buffer 421-5 corresponding to each framer / sudes 423.
  • the queuing engine 421 of the remote unit 400 may include a plurality of framers / surdes 422 corresponding to higher nodes.
  • the queuing engine 421 of the remote unit 400 may include a plurality of local buffers 421-4 and / or originating buffers 421-6 corresponding to each framer / sudes 422.
  • each component constituting the distributed antenna system 1 may include a different queuing engine configuration according to the situation.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une unité de nœud comportant un moteur de mise en file d'attente pour la diffusion groupée de données Ethernet, et un système d'antennes réparties la comportant. L'unité de nœud est une unité de nœud qui est reliée par ramification à une pluralité de sous-nœuds, et comporte: un module de commande d'accès au support (MAC); et un moteur de mise en file d'attente servant à interfacer des données Ethernet entre le module MAC et la pluralité de sous-nœuds reliés par ramification, le moteur de mise en file d'attente comportant un tampon servant à réaliser la diffusion groupée de données Ethernet reçues en provenance du module MAC vers la pluralité de sous-nœuds reliés par ramification, à transférer des données Ethernet reçues en provenance de la pluralité de sous-nœuds reliés par ramification vers le module MAC, à mettre en tampon des données Ethernet reçues en provenance de la pluralité de sous-nœuds reliés par ramification, et à délivrer les données Ethernet mises en tampon au module MAC.
PCT/KR2015/014514 2014-12-30 2015-12-30 Unité de nœud comportant un moteur de mise en file d'attente pour la diffusion groupée de données ethernet, et système d'antennes réparties la comportant WO2016108640A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/540,638 US10523452B2 (en) 2014-12-30 2015-12-30 Node unit including queuing engine for multicasting ethernet data and distributed antenna system including the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2014-0194360 2014-12-30
KR20140194360 2014-12-30
KR10-2015-0026054 2015-02-24
KR1020150026054A KR102386123B1 (ko) 2014-12-30 2015-02-24 이더넷 데이터를 브로드캐스팅하기 위한 더미 허브를 포함하는 노드 유닛 및 이를 포함하는 분산 안테나 시스템

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WO2016108640A1 true WO2016108640A1 (fr) 2016-07-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120057572A1 (en) * 2010-09-02 2012-03-08 Samplify Systems, Inc. Transmission Of Multiprotocol Data in a Distributed Antenna System
KR20140045444A (ko) * 2011-06-09 2014-04-16 에이디씨 텔레커뮤니케이션스 인코포레이티드 집적된 무선 주파수 회로부를 갖는 안테나 모듈
US20140119281A1 (en) * 2012-10-31 2014-05-01 Andrew Llc Digital Baseband Transport in Telecommunications Distribution Systems
KR20140121551A (ko) * 2013-04-05 2014-10-16 엘에스전선 주식회사 분산 안테나 시스템
US20140314002A1 (en) * 2013-04-17 2014-10-23 Andrew Llc Extracting sub-bands from signals in a frequency domain

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120057572A1 (en) * 2010-09-02 2012-03-08 Samplify Systems, Inc. Transmission Of Multiprotocol Data in a Distributed Antenna System
KR20140045444A (ko) * 2011-06-09 2014-04-16 에이디씨 텔레커뮤니케이션스 인코포레이티드 집적된 무선 주파수 회로부를 갖는 안테나 모듈
US20140119281A1 (en) * 2012-10-31 2014-05-01 Andrew Llc Digital Baseband Transport in Telecommunications Distribution Systems
KR20140121551A (ko) * 2013-04-05 2014-10-16 엘에스전선 주식회사 분산 안테나 시스템
US20140314002A1 (en) * 2013-04-17 2014-10-23 Andrew Llc Extracting sub-bands from signals in a frequency domain

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