CN108604912A - The virtual radio exchanged using the telecommunication network and digital multiplex of software definition is electrically accessed network - Google Patents

Abstract

One kind includes one or more Base Band Unit (BBU) for the system of the route signal in distributing antenna system (DAS).Each in one or more of BBU has one or more numeral outputs.The system further includes multiple digital multiplexer units (DMU), coupled to each other and operable with the route signal between multiple DMU.Each in the multiple DMU is operable, to receive one or more numeral inputs from one or more BBU.The system further includes multiple digital remote units (DRU), is coupled with the multiple DMU and operable to transmit signal between one or more of multiple DRU and multiple DMU DMU.

Description

The virtual radio exchanged using the telecommunication network and digital multiplex of software definition Access network

Cross reference to related applications

This application claims the equity for the U.S. Provisional Patent Application No.62/258,289 that on November 20th, 2015 submits.This Application is also the application number of entitled " digital multiplexer in distributing antenna system " submitted on December 23rd, 2014 For No.14/580, the part continuation application of 585 U.S. Patent application, which requires on December 23rd, 2013 Submit entitled " digital multiplexer in distributing antenna system " application No. is the U.S. of No.61/920,397 to face When patent application priority.Above-mentioned application is incorporated herein by reference in their entirety for all purposes.

Background of invention

Wireless and Mobile Network Operator, which is faced with, builds persistently choosing for the network for effectively managing high data traffic growth rate War.The mobility of terminal user and the horizontal multimedia content improved require end to end network adaptation, support new demand servicing and Support the increased demand to broadband and nontraffic sensitive access to the Internet.Most difficult one of the challenge of network operators face is Caused by physics movement by subscriber from a position to another position, and especially when a large amount of wireless subscriber is gathered in When one position.One noticeable example is commercial enterprise's facility during the lunchtime, is had at this time a large amount of wireless Subscriber comes the dining room in the building.At this point, a large amount of subscriber has been moved off their office and usual working region. It is likely to during the lunchtime, there are the positions that multiple wherein subscribers are considerably less in entire facility.If indoor wireless net Network resource is suitably arranged size in the design process to be directed within the normal working time when subscriber is in their normal Subscriber's load condition in working region, it is more likely that above-mentioned lunchtime scene can have some in relation to available wireless capacity With the unexpected challenge of data throughout.

In order to solve these problems, distributing antenna system (DAS) has been developed and has deployed.Although DAS has been achieved with Progress, but in the art there is still a need for DAS relevant improved method and systems.

Invention content

Present invention relates in general to the nothings using distributing antenna system (DAS) as a part for distributed wireless networks Line communication system.More particularly it relates to the DAS of the radio (SDR) using software definition.Wireless and mobile network fortune Battalion quotient is faced with the continuing challenge that structure effectively manages the network of high data traffic growth rate.The mobility and level of terminal user The multimedia content generally use end to end network of raising is adapted to, support new demand servicing and support to broadband and nontraffic sensitive because The increased demand that spy's net accesses.Distributing antenna system (DAS), which provides to route the signals to, is distributed in given geographic area On various antennas mechanism.Signal is usually originated from base transceiver station (BTS) (also referred to as base station), or number with RF frequency Ground is originated from Base Band Unit (BBU).BBU is a part for distributed base station system, wherein radio unit (RU) and BBU physics point From.Such distributed structure/architecture can increase the flexibility of networking, and reduce the cost for safeguarding network.BBU and RU it Between some universal interface standards be that OBSAI (Open Base Station Architecture), CPRI (common public radio interface) and ORI (are opened Put formula radio interface).Honeycomb payload data transmits (transport) with high data rate between multiple BBU and RU. BBU Framed Datas include：Payload I/Q data, control and management (C＆M) information, carrier frequency, signal bandwidth etc..In base band BBU and the BTS of RF between interaction public DAS platforms can simplify distributing antenna system framework.

According to some embodiments of the present invention, a kind of system is provided.The system includes forward pass interface, the forward pass interface packet Include multiple DMU.Each DMU in multiple DMU is configured to receive multiple signals from BBU, extracts the subset of multiple signals, will The subset of multiple signals is gathered into stream, and the stream is routed to one or more of multiple DRU DRU.

According to some embodiments of the present invention, a kind of method is provided.This method, which is included at DMU, to be received from the more of BBU A signal.This method further comprises the subset for extracting multiple signals.This method further includes being gathered into the subset of multiple signals Stream.This method further includes that the stream is routed to one or more of multiple DRU DRU.

According to an embodiment of the invention, a kind of system for the route signal in distributing antenna system (DAS) is provided. The system includes one or more Base Band Unit (BBU).Each in one or more of BBU has one or more Numeral output.The system further includes multiple digital multiplexer units (DMU), coupled to each other and operable with multiple Route signal between DMU.Each in multiple DMU is operable defeated to receive one or more numbers from one or more BBU Enter.The system further comprises multiple digital remote units (DRU), is coupled to multiple DMU and operable in multiple DRU Signal is transmitted between one or more of multiple DMU DMU.

According to another embodiment of the present invention, it provides a kind of for the route signal in distributing antenna system (DAS) Method, the distributing antenna system include multiple digital multiplexer units (DMU) and multiple digital remote units (DRU).The method includes being received at the port of multiple DMU from the sector port of one or more Base Band Unit (BBU) Digital signal.The method further includes digital signal being route between multiple DMU, and passed between multiple DMU and multiple DRU Send digital signal.

According to a particular embodiment of the invention, a kind of distributing antenna system (DAS) is provided.The DAS includes multiple numbers Multiplexer module (DMU), it is coupled to each other and operable with the route signal between multiple DMU.It is each in multiple DMU A includes multiple digital input ports, and the digital input port is operable to receive number from one or more of multiple BBU Word inputs.Each in multiple BBU includes multiple digital output ports.DAS further includes multiple Digital Access units (DAU), Its is coupled to each other and operable with the route signal between multiple DAU.Each in multiple DAU includes multiple analog input ends Mouthful, the simulation input port is operable to receive simulation RF inputs from one or more of multiple BTS.In multiple BTS Each includes multiple simulation RF output ports.DAS further comprises multiple digital remote units (DRU), is coupled to more A DMU and operable to transmit signal between DRU and DMU, each in multiple DRU includes remote antenna.

According to a particular embodiment of the invention, a kind of system for the route signal in distributing antenna system is provided. The system includes multiple digital multiplexer units (DMU).Multiple DMU are coupled and operable with the road between multiple DMU By signal.The system further includes multiple digital remote units (DRU), be coupled to multiple DMU and it is operable in DRU and Transmit signal, multiple Base Band Unit (BBU) between DMU, number be connected to multiple DMU and it is operable in multiple DMU and Route signal between multiple number connections.

According to another embodiment of the present invention, a kind of system is provided.The system includes core network, with core network Data center, and multiple digital remote units (DRU) for being communicated with data center.Data center includes multiple Base Band Unit (BBU) and multiple digital multiplex units (DMU).Multiple DMU are configured to routing to I/Q data into one in multiple DRU It is a or multiple.The control of each DMU and DRU and management (C＆M) function are located in cloud network.

Through the invention, the benefit of many beyond tradition technologies is realized.For example, the embodiment provides methods And system, using the system element with the hardware requirement reduced (for example, wireless in radio unit and DAU in BTS Electric unit), to reducing system cost, reducing system power dissipation and reducing system dimension.In addition, described herein Embodiment is reduce or eliminated to executing RF to number conversion and number to the requirement of RF conversions, to reduce Signal Degrade. In conjunction be hereafter more fully described with attached drawing the present invention these and other embodiment together with many advantages of the present invention and spy Sign.

The brief description of accompanying drawing

From a detailed description with reference to the accompanying drawings, the further object of the present invention and excellent can be more fully understood by Point, wherein：

Fig. 1 is block diagram according to an embodiment of the invention, shows basic structure and transmits an example of route, The transmission route is based on tool and is connect with seven daisy chain types in three DMU and each cell (cell) there are one three sector BBU DRU together.

Fig. 2 is block diagram according to an embodiment of the invention, shows the basic of the frequency reuse mode for N=1 One example of structure and transmission route, which is based on tool, and there are one three sector BBU and three DMU and each cells In the DRU that links together of seven daisy chain types.

Fig. 3 is block diagram according to an embodiment of the invention, shows basic structure and transmits the example of route, the biography Send route based on linking together with seven daisy chain types in multiple three sectors BBU and three DMU and each cell DRU。

Fig. 4 is the Digital Access unit according to an embodiment of the invention for including physical node and local router (DAU) block diagram.

Fig. 5 is the block diagram of digital remote units according to an embodiment of the invention (DRU).

Fig. 6 shows canonical topology according to an embodiment of the invention, plurality of local router (DMU and DAU it) is interconnected with multiple remote routers.

Fig. 7 shows the block diagram of the interconnection between BTS to DAU and BBU to DMU.

Fig. 8 is the block diagram of digital multiplexer unit (DMU) according to an embodiment of the invention.

Fig. 9 is the simplified flowchart for the method for showing the route signal according to an embodiment of the invention in DAS.

Figure 10 is the schematic block diagram for showing radio access network according to an embodiment of the invention (RAN).

Figure 11 is the schematic block diagram for showing centralization RAN (C-RAN) according to an embodiment of the invention.

Figure 12 is the schematic block diagram for showing multi-operator C-RAN according to an embodiment of the invention.

Figure 13 is the schematic block diagram for showing cloud RAN according to an embodiment of the invention.

Figure 14 is to show that the simplifying for method of control and management (C＆M) RAN according to an embodiment of the invention is flowed Cheng Tu.

Figure 15 is to show the screen according to an embodiment of the invention for controlling and managing the user interface of DMU Sectional drawing.

Figure 16 is to show the screen according to an embodiment of the invention for controlling and managing the user interface of DRU Sectional drawing.

Figure 17 is the schematic block diagram for showing the cloud RAN in Metropolitan Area Network according to an embodiment of the invention.

The detailed description of invention

Distributing antenna system (DAS) provides the effective ways using base station resource.One associated with DAS or more A base station can be located in the commonly known as middle position of base station machine room and/or facility.Traditional DAS networks include one or The Digital Access unit (DAU) that multiple interfaces as between base station and digital remote units (DRU) work.DAU can be with Base station is arranged side by side.DRU can be that daisy chain type links together and/or is placed in star like arrangement, and be given geographic region Domain provides covering.DRU is usually connect by using High-speed Optical Fiber Link with DAU.This method helps to pass RF signals from base station It send to the remote location or region serviced by DRU.Typical base station includes that the separate radio of three commonly known as sectors provides Source.These three sectors be normally used for cover three separated geographic areas, without the user in three different sectors it Between generate cochannel interference.

Distribution-type base station architecture is related to the radio unit (RU) using Base Band Unit (BBU) and multiple long range positionings.It deposits In multiple standards for BBU to be interfaced to RU, some examples are OBSAI (Open Base Station Architecture), CPRI (general public nothings Line electrical interface) and ORI (open radio interface).Traditionally, distribution-type base station architecture and distributing antenna system (DAS) be no It is coexisted on same system.In general, distribution-type base station architecture is related to vendor-specific infrastructure and does not adapt to long-range nothing Line electric unit is shared.When place is due to the number of the problems such as such as space constraint, aesthetics constrain requirement limitation antenna and remote unit When amount, which results in problems.Shared infrastructure is to reduce vendor-specific list visual in given outdoor or covered court The means of the quantity of member.Distributing antenna system is preferably supplier and modulation is unknowable, to adapt to all different confessions Answer quotient's special purpose interface.RF signal of the capture from different supplier BTS is to ensure that the means that DAS system will be unknowable.However, RF signals can be digitized and be sent to remote unit by active DAS system, and thus they will be converted back to RF.Number connects It is the main computer unit that RF signals are received from different BTS to enter unit (DAU).

BTS includes BBU and juxtaposed radio unit.The different radio electric unit of multiple supplier BTS and the DAU of RF with Interface connects.More effective process will be using digital multiplexer unit (DMU), the digital multiplexer unit (DMU) supplier BBU is directly connected to digital interface.The framework will eliminate the requirement that BTS converts a signal into RF, and Then DAU is enabled to convert signals back to digital baseband.Other than the power consumption for reducing the additional step, net effect, which will remove, to be passed through Any damage that transfer process occurs.The DMU will can be connected to different supplier BBU with interface.DMU provides another key Function；It arranges different operators channel onto individual traffic, which is sent to different remote units. Remote unit radio channel is shared between different operators.Reverse operating will occur in DMU, so as to will be from different remote The uplink signal that Cheng Danyuan is received sends back DMU, and subsequently is assigned to specific BBU.The supplementary features of DMU exist In, when system have need when leaving BTS equipment of RF interfaces, can be connect into line interface with DAU.

Implementation shown in FIG. 1 is illustrated the basis DAS network architectures according to an embodiment of the invention, and provides The example of data transfer scheme between a three sector BBU and multiple DRU.In the present embodiment, DRU is connected with daisy chain type It is connected together to realize covering in specific geographic area.Each individually sector covering is identified as cell (Cell) Independent geographic area.

Fig. 1 shows the DAS using multiple digital remote units (DRU) and multiple digital multiplexer units (DMU) System.According to the present invention, each DRU provides unique title information associated with each DRU, uniquely identifies specific by this The uplink data that digital remote units receive.

One feature of the embodiment of the present invention is that have to route base radio between DRU or one or more DRU groups The ability of resource.In order to route the radio resource that can be obtained from one or more base stations, it is expected that configuring DMU in DAS networks With the independent table of router of DRU.

DMU 102,108 and 111 is networked together route DRU signals to facilitate in multiple DMU.DMU is supported in BBU The transmission of RF downlinks and RF uplink signals between DRU.The framework enables different Base Band Unit signals same When or be jointly transferred to multiple DRU and from multiple DRU transmit.In some embodiments, the ports PEER are for interconnecting DMU With interconnection DRU.

DMU has the downlink letter that control transmits between DMU and the one or more Base Band Unit being connect with the DMU Number and uplink signal gain (little increment in a wide range) ability.This ability is provided while being controlled specific The uplink in paths of the DRU (or one group of DRU via associated one or more DMU) between specific baseband unit sector The flexibility on road and downlink connectivity.

The embodiment of the present invention carrys out the DMU of configuration of networked using table of router.The foundation of local router table is input to various The mapping of output.When the input from outside port and the ports PEER needs to be merged into same data flow, inside merges block It is used for downlink table.Similarly, when the input from LAN port and the ports PEER needs to be integrated into same data flow When, merging block is used in uplink table.

Remote router table establishes the mapping for being input to various outputs.When the input from LAN port and the ports PEER needs When being integrated into same data flow, inside merges block and is used for downlink table.Similarly, when from outside port and When the input of the ports PEER needs to be integrated into same data flow, merging block is used in uplink table.

As shown in Figure 1, individually the radio resource of Base Band Unit sector is sent to the daisy chain network of DRU.Each The radio resource of individual sector provides covering via the DRU of networking to independent geographic area.Fig. 1 shows three cells How (each cell includes the separate network of 7 DRU) for given geographic area provides covering.Server 112 is for controlling The function of exchange provided in DAS networks.With reference to figure 1, and by way of example, DMU 1 (102), which is received, comes from the sectors BBU 1 (101) digital downstream link signal.DMU 1 arranges the baseband signal from other DMU onto serial stream, and optical fiber electricity Required digital signal is transmitted to DRU 2 (104) by cable 123.All digital optical signals are transmitted to DRU 3 by optical cable 105 (106).Other DRU in daisy chain are related to optical signal being passed forward to DRU 1 (107).Therefore, the embodiment of the present invention carries Digital signal is received for multiple sectors (for example, sector 1 (101), sector 2 (109) and sector 3 (110)) of the BBU from base station Ability.Digital signal is received by one or more DMU, and one or more of DMU are connected with each other and are controlled by server 112 System, so as to route digital signal between DMU.The digital signal may be handled in DMU, and be then routed to number Remote unit is shown with DRU 1 to DRU 21 in Fig. 1.

DMU 1 (102) and DMU 2 (108) and DMU 3 (111) networks, to allow to come from sector 2 (109) and sector 3 (110) down link signal is transferred into all DRU in cell 1.The exchange of the system and routing function make it possible to The signal of which sector is selected to be sent and received by each DRU.DMU 2 (108) optical cables 124 are connected to (the DRU 15- of cell 3 21), and DMU 3 (111) optical cables 125 are connected to cell 2 (DRU 8-14).

Because DMU receives digital signal from Base Band Unit, such as by optical fiber, but can also be by using other communications Digital signal so they can be handled the digital signal received, and is transmitted to DRU using as RF signals by medium It is broadcast to user.Although the embodiment of the present invention discusses reception and transmission digital signal, these digital signals are not needed Identical because can transmit the digital signal received through handle version, digital signal can also be referred to as.As Example can receive the digital signal from sector 1 (101) at DMU 1 (102), can also be received by DMU 2 (108) Digital signal from sector 2 (109).These digital signals can be combined into individual digit signal for being sent to cell 1.Therefore, although specification and claims refer to the digital signal in each stage of communication process, these are not needed Digital signal is identical.Those skilled in the art will be recognized that a variety of variations, modification and replace.

As shown in Figure 1, DMU receives digital signal from the sector of BBU, then these digital signals are guided to each DRU. Although it should be noted that the embodiment of the present invention discusses reception digital signal, such as digital signal is received from BBU, and number is believed Number DRU is for example transferred to by DMU, but the digital signal for being transferred to DRU need not be identical as the digital signal received from BBU. As an example, as set forth above, it is possible to combine multiple signals from multiple sectors at DMU, the signal for that will combine passes Transport to DRU.Additional description about DAS provides in the U.S. Patent application of Publication No. No.2013/0114963, announces On May 9th, 2014, (acting on behalf of Reference Number 91172-856309 (102800US)), the disclosure of which is whole by reference herein Body is incorporated herein for all purposes.

Fig. 2 shows when using the frequency reuse mode of N=l, how single BBU is for being larger geographic region Domain provides the embodiment of covering.With reference to figure 2, cell 1 and cell 8 are by the radio resource of the sector 1 (201) of shared BBU.It is similar The radio resource of shared sector 3 (216) is connected to via optical cable 231 and 232 by ground, cell 2 and cell 10 respectively DMU214。

DMU controls the routing of the data between BBU and DRU.Each individually data packet has a data head, the data Head uniquely identifies that DRU associated there.The DMU for example by using optical fiber interconnections, with allow multiple DMU it Between transmit data.This feature provides unique flexibility in DAS networks, with the road between the sector of BBU and individual DRU By signal.Server 220 is for controlling the function of exchange provided in DAS networks.

With reference to figure 2, and in an illustrative manner, DMU 1 (202) receives down link signal from 1 sectors 1 (201) BBU. DMU 1 arranges baseband signal onto serial stream from another DMU, and desired signal is transmitted in cell 1 by fiber optic cables 203 DRU 2 (204).All optical signals are transmitted to DRU 3 (206) by optical cable 205.Other DRU in daisy chain are related to light Signal is passed forward to DRU 1 (207).DMU 1 (202) and DMU 2 (208) and DMU 3 (214) networks, to allow from fan The down link signal of area 2 and sector 3 is sent to all DRU in cell 1.

Similarly, for cell 8, desired signal is transmitted to DRU 23 (210) by fiber optic cables 209 from DMU 1 (202). All optical signals are transmitted to DRU 24 (212) by optical cable 211.Other DRU in daisy chain in cell 8 are related to believing light Number it is passed forward to DRU 22 (213).Due to channeling, via the multiple optical cables being connected with the light output end of multiple DMU, DMU 1 (202) can pass the signal along to multiple cells in star like arrangement, as shown in Figure 2.

Fig. 3 shows the embodiment of the application using BBU computer rooms, wherein N number of BBU is interconnected to the given geography of service Region.The BBU can represent independent wireless carriers and/or multiple interface standards (CPRI, OBSAI, ORI etc.). As shown in figure 3, multiple three sectors BBU are connected to daisy chain DAS networks, wherein each DMU is inputted and connected using multiple light To the single light output of given cell.Therefore, different operators or different frequency bands can be by the different sectors of BBU come table Show.Although being not shown in figure 3, for the sake of clarity, DMU can have multiple input as shown in Figure 3 and such as Fig. 2 institutes The multiple outputs shown.Correspondingly, multiple input is using (wherein, receiving multiple numeral inputs from different BBU) and multiple Output application (multiple numeral outputs wherein, are provided at DMU) is included within the scope of the invention.

With reference to figure 3, and by way of example, DMU 1 (302) receives down link signal from the sectors BBU 1 (301). Desired signal is transmitted to DRU 2 (304) by DMU 1 (302).All optical signals are transmitted to DRU 3 (306) by optical cable 305.Chrysanthemum Other DRU in pattern chain are related to optical signal being passed forward to DRU 1 (307).DMU 1 (302) and DMU 2 (308) networks, with The down link signal from 1 sectors 2 (320) BBU is allowed to be sent to all DRU in cell 1.DMU 1 (302) is from BBU Sector N (309) receives down link signal.DMU 1 (302) carries out all down link signals from each BBU and DMU It arranges.

In order to efficiently utilize limited BBU resources, the network of DRU should have and will be sent to and be originated from any sectors BBU Their own uplink signal and the ability that redirects of down link signal.Due to DRU data traffics (data Traffic) there is unique stream, so DMU routers have the mechanism for routing the signals to different BBU.

Fig. 4 shows 2 essential elements in DAU, physical node (400) and local router (401).Physical node will RF signals are converted to the base band for downlink, and from baseband-converted be the RF for uplink.Local router exists Direct traffic (traffic) between various LAN ports, the ports PEER and outside port.Physical node is connected to radio frequency (RF) BTS.Physical node can be used for different operators, different frequency ranges, different channels, etc..Physical node can be via double Work device, which combines down link signal and uplink signal or physical node, can keep downlink and uplink signal Separation, the case where as being configured for either simplex.It is in some embodiments, as shown in fig. 8 compared with DMU shown in Fig. 8 Without utilizing physical node 400 in DMU.

Fig. 4 shows the embodiment of DAU, wherein physical node have for uplink (405) separation output and Separation for downlink path (404) inputs.Signal is converted to the base for downlink path by physical node from RF It is the RF for uplink path with and from baseband-converted.Physical node is connected to via outside port (409,410) Local router.Router is port guided to selected external U (uplink) from LAN and PEER by uplink data flow Port.Similarly, router by downlink chain circuit data stream from external D (downlink) it is port guided to selected LAN and The ports PEER.

In one embodiment, the ports LAN and PEER are connected to the network of DMU and DRU via optical fiber.Network connection also may be used With the copper-connection for using CAT 5 or 6 cables etc. or other suitable interconnection equipments.DAU also utilizes IP (406) to be connected To internet network.Ethernet connection (408) is additionally operable to be communicated between main computer unit and DAU.DRU can also via with Too net port is directly connected to Remote Operating Control Centers (407).In the United States Patent (USP) Shen of Publication No. No.2013/0114963 Please in provide with the relevant additional descriptions of DAU, be incorporated herein by reference by above-mentioned.

Fig. 5 shows 2 essential elements in DRU, physical node (501) and remote router (500).The DRU packets Include both remote router and physical node.Remote router guides stream between LAN port, outside port and the ports PEER Amount.Physical node is connected to BTS with radio frequency (RF).Physical node can be used for different operators, different frequency ranges, different letters Road, etc..Embodiment shown in Fig. 5, wherein physical node have the separation input for uplink (504) and are used for down The separation of uplink path (503) exports.Physical node by signal from RF be converted to for uplink path base band and It is the RF for downlink path from baseband-converted.Physical node is connected to long-range road via outside port (506,507) By device.Router is port guided to the selected ports external D from LAN and PEER by downlink chain circuit data stream.Similarly, it route Device is port guided to the selected ports LAN and PEER from external U by uplink data flow.DRU further includes Ethernet exchanging Machine (505) is so that remote computer or wireless access point may be coupled to internet.Publication No. No.2013/0114963's Provided in U.S. Patent application with the relevant additional descriptions of DRU, be incorporated herein by reference by above-mentioned.

Fig. 6 depicts DAS networks, includes multiple DMU, one or more DAU in a DMU and DAU network topology And multiple DRU.It is shown with daisy chain configuration by the local router shown in DMU A and DMU B and DAU L.Although in order to Single DAU is shown for the sake of clear, can utilize additional DAU in this embodiment.By 601,605,606,607 and of DRU 609 remote router shown partially is shown with star and/or daisy chain configuration.Compared with Fig. 5, it can be seen that long-range Router 601A and physical node 601B is the component of DRU.Local router in DMU and DAU can be via by optical cable 617 With the PEER port interconnections shown in 620.Local router via optics, copper or other can be suitably connected in DRU Remote router.Remote router in DRU can be connect with daisy chain configuration with other DRU or they can be through It is connect with local router by star like arrangement.In the physical node for being connected to local router (for example, DMU) and it is connected to long-range There is no in the case of being directly connected between the physical node of router (for example, DRU), the ports PEER in DMU are used. The ports PEER at DRU are for the daisy chain type connection between two or more DRU.DMU 600/604 is via optical cable 630/632 Digital signal is received from BBU networks 631/633.DMU 600 is connected to DRU 601 via optical cable 615 and 616.DRU 605 is passed through DRU 605 is connected to by optical cable 619A and 619B.Using optical cable 618 and 621, DMU 604 is connected to DRU with star like arrangement 606 and 607.DAU 608 is connected to DRU 609 via optical cable 622.

Fig. 7 shows the embodiment for showing the application using base station/Base Band Unit computer room, and plurality of BTS and BBU can be with It is connected to each other to service given geographic area.It will be apparent to those skilled in the art that Fig. 6 and Fig. 7 are provided The diagram of relevant network topology, wherein digital signal are received from BBU via optical cable by DMU 600/604, and RF signals are by DAU 608 from BTS via RF cable receptions.In the embodiment shown in fig. 7, three sector BTS of one or more and one or more three Sector BBU may be connected to daisy chain type DAS networks.BBU can indicate independent wireless carriers, multiple frequency bands And/or multiple interface standards (CPRI, OBSAI, ORI etc.).BTS can represent independent wireless carriers and at RF with DAU is connected with interface.With reference to figure 7, and in an illustrative manner, DAU 1 (702) is from the sectors 1 BTS N (709) via RF cables 711 Receive down link signal.Desired signal is transmitted to DRU2 (704) by DAU 1 (702) via optical cable 703.Optical cable 705 will own Optical signal be transmitted to DRU 3 (706).Other DRU in daisy chain are related to optical signal being passed forward to DRU 1 (707). DAU 1 (702) and DAU 2 (708) networks, to allow to send in cell 1 from the down link signal of the sectors BTS N 2 All DRU.DAU 2 (708) receives the down link signal from the sectors BTS N (709) via DAU 1, and via RF electricity Cable 732 receives down link signal from the sectors BTS 2 (931).

DMU 1 (712) is connect with 1 sectors 1 (701) BBU with interface.DMU 1 is mutual via optical cable 741 and DAU 3 743 Even.The networking of DAU to DMU provides a kind of signal of the use from BTS to arrange the mechanism of the signal from BTS.Correspondingly, Analog rf signal from BTS and the digital optical signal from BBU can be routed to required using topology shown in fig. 7 DRU。

As shown in fig. 7, the analog signal from BTS and the digital signal from BBU can use DAU and DMU by DAS respectively Network receives.Correspondingly, it is unknowable that the DAS system that the embodiment of the present invention provides is considered input signal, because It can receive numeral input from BBU networks and the simulation RF inputs from BTS, then by system to remote antenna Convey these signals.Certainly, in uplink path, system can receive input at remote antenna, and then by these Signal is communicated to BBU or DAU with the format of number or simulation.

Fig. 8 shows the block diagram of digital multiplexer unit (DMU).DMU 800 includes router and BBU interface sections Point.Router guides the communication between LAN port, the ports BBU and the ports PEER.BBU nodes can be used for different operator BBU Equipment.Router is port guided to the selected ports BBU from LAN and PEER by uplink data flow.Similarly, router Downlink chain circuit data stream is port guided to the selected ports LAN and PEER from BBU.The ports BBU will go to its particular port Uplink signal be converted to by being connected to interface standard used in the BBU of the particular port.Similarly, the ends BBU are come from The down link signal of mouth is converted into the public base band for arranging various down link signals from specific BBU consensus standards Signal.DMU also includes ethernet port (802) so that remote computer or wireless access point may be coupled to internet.DMU LAN port the various DRU being connect with DMU are connected to interface.The ports PEER with other DMU or DAU interfaces for connecting.

DMU is different from DAU in many aspects.For DAU, the interface to base station is via RF, that is, is connect at DAU The analog rf signal of receipts.Since base station includes two entities：Base Band Unit (BBU) executes digital baseband transmission system and RF Unit can also be referred to as radio unit.In the system using DAU, digital signal is passed to RF units by BBU, The signal is up-converted into RF, and supplies the signal to DAU, then the RF signals are converted to number by the DAU Signal.The embodiment of the present invention receives digital signal using DMU from BBU, removes the process of digital-to-RF conversion, then carries out RF To the conversion of number.Therefore, embodiment uses DMU, directly provides digital interface to BBU, to around the nothing in the BTS Line electric unit simultaneously bypasses the parts RF present in DAU.

As discussed in connection with FIG, signal processing can be executed to the digital signal received from BBU, for example, at the ends BBU At mouth 1, before for example, by LAN port 1 by digital data transmission to DRU.Therefore, the number received at the ports BBU Signal need not be identical as the digital signal transmitted at LAN port.Correspondingly, terms used herein digital signal includes following Embodiment：Digital signal is received, by DMU processing, and transmits the digital signal, it is need not receiving and transmission Digital signal is identical.Those skilled in the art will be recognized that a variety of variations, modifications and substitutions.

Referring again to Fig. 8, input 808 is the numeral input from BBU networks, and it is to the digital defeated of DRU to export 803 Go out.In addition to the signal from BBU networks, DMU 800 can also be received to flow from the IP of internet 805 or other IP data sources Amount.Correspondingly, the mobile data traffic from BBU networks and the IP flows from internet can by DMU upstream with lower downstream, As shown in Figure 8.

Fig. 9 is the simplified flowchart for the method for showing the route signal in DAS according to an embodiment of the invention.DAS Including multiple digital multiplexer units (DMU) and multiple digital remote units (DRU).The method includes the multiple The digital signal for the sector port for carrying out self-corresponding Base Band Unit (BBU) is received at the port of DMU.The port of DMU be send and Receive the input/output end port of digital signal (it can be digital optical signal).The sector port of BBU is related to the sector of BBU Connection, and be also the input/output end port for sending and receiving digital signal (it can be digital optical signal).

This method further includes routeing digital signal between multiple DMU.As shown in this article, DMU is coupled to each other, for example, At the ports PEER, using optical fiber, the communication between DMU is realized.The routing of digital signal between multiple DMU may include pair The first digital signal received from the first BBU and the second digital signal received from the 2nd BBU are arranged.Digital signal, example Such as, can digital signal associated with the sector 1 of the first BBU and the sector 1 of the 2nd BBU, can then be route for combination Signal 1.In the present embodiment, the digital signal of arrangement is directed into one in multiple DRU, wherein remote antenna can be used To handle and broadcast the signal.

The above method, which is included between multiple DMU and multiple DRU, transmits digital signal.Such as DMU and DRU using optical fiber Coupling, enabling the digital signal received from BBU is transferred into DRU and so that the signal received at DRU It is transferred into BBU.

In some embodiments, it includes using routing table that digital signal is route between DMU.These routing tables can be deposited Storage is otherwise arranged at the server for being coupled to multiple DMU.In another embodiment, routing table stored or with Other modes are arranged at one or more DRU.In yet another embodiment, routing table, for example, for each DMU and/or often The routing table of a DRU is stored in cloud.Routing table may include merging block, which helps to merge at multiple DRU The signal received.In one embodiment, the power level for independently controlling each carrier wave in each DRU, to improve System performance.

It should be appreciated that particular step shown in Fig. 9 provides the route signal in DAS according to an embodiment of the invention Ad hoc approach.Other sequence of steps can also be executed according to class alternate embodiment.For example, the alternate embodiments of the present invention can be with The step of being executed in different order above-outlined.In addition, each step shown in Fig. 9 may include multiple sub-steps, this A little step can be executed according to the various sequences for being suitable for independent step.In addition, can add or remove according to specific application Additional step.Those skilled in the art will be recognized that a variety of variations, modification and replace.

In some embodiments of the invention, using table of router come the DAU of configuration of networked.Local router table is established defeated Enter the mapping to various outputs.It is interior when the input from outside port and the ports PEER needs to be merged into same data flow Portion merges block and is used for downlink table.Similarly, when the input from LAN port and the ports PEER needs to be merged into same data When in stream, merging block is used in uplink table.

Remote router table establishes the mapping for being input to various outputs.When the input from LAN port and the ports PEER needs When being merged into same data flow, inside merges block and is used for downlink table.Similarly, when from outside port and PEER When the input of port needs to be merged into same data flow, merging block is used in uplink table.In U.S. Patent application public affairs Open provided in No.2013/0114963 with the relevant additional description of table of router, it is incorporated herein by reference.

As an example, to meet desired capacity and throughput objective or wireless user's demand, can be controlled via software Come be arranged distribute to specific DMU/DRU or DMU/DRU groups radio resource (such as RF carrier wave, the power level of each carrier wave, LTE resource blocks, CDMA codes or TDMA slot) amount.The application of the present invention be suitable for distributed base station, distributed Base Band Unit, It distributing antenna system, distributed relay device, mobile device and wireless terminal, portable radio machine and such as microwave and defends Other wireless communication systems of star communication.

Figure 10 is the schematic block diagram of radio access network according to an embodiment of the invention (RAN) 1000.RAN 1000 Core network 1010 (in this case, such as evolution block core (EPC) network, and including mobile device, public peace The user equipment of full equipment and Wi-Fi equipment) between connection is provided.Core network 1010 is returned by gigabit Ethernet (GbE) Journey transmits, for example, using 6/7 cables of CAT, is connected to base station transmitting-receiving station (BTS)/pond Base Band Unit (BBU) 1020.BTS/ The ponds BBU 1020 may include one or more Base Transceiver Stations (BTS) 1022 and one or more Base Band Unit (BBU) 1024。

BTS 1022 and BBU 1024 merges transmission base station resource with one or more collection to remote unit (for example, DRU 1040,1042,1044, etc.) general base station interface pallet (UBiT) 1030 carries out two-way communication.UbiT 1030 is transports more Quotient, multiband/channel and multi-standard are sought, and provides RF and front end interface for packetized data (for example, CPRI data, ORI Data etc.).In some embodiments, the forward pass interface of UbiT 1030 can be included on one single chip.In some embodiments In, forward pass interface can be included on a plate or be used as on multiple plates rack installing type unit.UbiT 1030 implements conduct The open API (API) of its data-interface.In one embodiment, UbiT 1030 provide every wavelength up to and Number transmission higher than 10Gbps.UbiT 1030 includes one or more RF adjusters (RFC), main computer unit and baseband interface (BBI).BBI can be digital multiplexer as described herein.

Digital remote units (DRU 1040,1042,1044) can with indoor or outdoors antenna, WiFi access points (AP), And/or (one or more) IP/IoT equipment or one or more application are communicated, with for Information Mobile Service, public safety band and WiFi provides support.In one embodiment, WiFi AP and/or (one or more) IP/IoT equipment can be received from DRU IP communication.Therefore, IP communications can be route together with I/Q data between DMU and DRU.The DRU can be that software is configurable , and can be middle power (for example,+30dBm/ch ,+37dBm/ch etc.) or high power (for example,+43dBm/ch ,+ 46dBm/ch etc.).They can provide channelizing processing, and the capacity routing and IP backhauls of demand are (for example, 1Gbps, 10Gbps Deng).DRU can be, for example, all any kind of remote units as described herein.

The ponds BTS/BBU 1020, UbiT, DRU 1040,1042,1044 can be located remotely from core network 1010 A part for the access network 1015 of one or more positions.

Figure 11 is the schematic block diagram of centralized radio access network (C-RAN) 1100 according to an embodiment of the invention. C-RAN 1100 provides core network 1110 (such as EPC networks) and including mobile device, public safety equipment and WiFi equipment Connection between user equipment.Core network 1110 is transmitted by GbE backhauls, for example, using 6/7 cables of CAT, is connected to The ponds BBU 1120.The ponds BBU 1120 may include one or more Base Band Unit (BBU) 1122,1124.

The ponds BBU 1120 are communicated with one or more forward pass interfaces 1130.Forward pass interface 1130 may include for exchanging (example Such as, routing input port is to output port) and/or routing (for example, using source and destination address scheme) any packetizing side Method and/or transportation protocol.Exemplary forward pass interface 1130 may include being used for CPRI, ORI, Ethernet, the CPRI on Ethernet Deng interchanger and/or router.In some embodiments, forward pass interface 1130 can be respectively included on one single chip. In some embodiments, forward pass interface 1130 can be included in as rack installing type unit on a plate or multiple plates.Before It passes interface 1130 and realizes packet-based exchange and routing packets (for example, payload I/Q numbers using DMU 1132,1134 According to control ＆ manages data, data header information, IP flows etc.).Forward pass interface 1130 and various positions direct communication, and with make It is communicated with another DMU 1142 of the another position of the interface standard of such as 10,40 or 100Gbps.The ponds BBU 1120 and forward pass Central office 1115 can be collectively formed in interface 1130.In some embodiments, central office 1115 may be located remotely from core network 1110 Positioning.

DMU 1132,1134,1142 realizes opening API based on packetizing agreement in one embodiment, and provides example Such as, per wavelength up to and the interface higher than 10Gbps.DMU 1132,1134,1142, which is provided, integrates Wave division multiplexing (WDM) For such as 40Gbps and 100Gbps.DMU 1142 and one or more DRU (for example, DRU 1152,1154,1156,1162, 1164,1166) it is connected with interface.DMU 114 and DRU 1152,1154,1156,1162,1164,1166 can be located remotely from A part for the access network 1140 of the one or more positions of core network 1110 and/or central office 1115.

Forward pass interface 1130 may include arbitrary DMU described herein.DMU 1132,1134,1142 has forwarding Plane and control plane.Forwarding plane includes by the routed path by DMU of C＆M (control and management) configuration.In some realities It applies in example, C＆M configurations are located in cloud as further described herein, although these functions are alternatively configured in server In, as described further on this.C＆M establishes routed path between the outputting and inputting of each DMU.

DMU 1132,1134 can be configured to receive multiple signals from one or more BBU 1122,1124.DMU 1132,1134 can extract the son for the multiple signals for being intended for specific DRU 1152,1154,1156,1162,1164,1166 Collection, as specified as C＆M information, as further described herein.The subset of multiple signals can be gathered by DMU 1132,1134 Stream, and the stream is routed to one or more DRU 1152,1154,1156,1162,1164,1166.The stream can be via DMU 1142 is routed to one or more DRU 1152,1154,1156,1162,1164,1166.In some embodiments, exist Before stream is routed to one or more DRU 1152,1154,1156,1162,1164,1166, DMU 1142 can decompose institute State stream, such as back in the subset of signal.As shown in figure 11, DMU 1142 can with DRU 1152,1154,1156,1162, 1164,1166 juxtapositions together, for example, being located remotely from the position of DMU 1132,1134.

In one embodiment, DMU 1142 can be removed.In other words, 1132 DMU, 1134 can be by the direct road of the stream By to one or more DRU 1152,1154,1156,1162,1164,1166.In the present embodiment, forward pass interface 1130 can be with Directly communicated with DRU.The DRU can be connect by daisy chain type with the additional DRU of one or more or be deployed in star like arrangement.

DRU 1152,1154,1156,1162,1164,1166 can be with one or more IP/IoT equipment or one or more Application communication, and support can be provided for Information Mobile Service, public safety band and WiFi.In one embodiment, WiFi AP and/ Or one or more IP/IoT equipment can receive IP flows from RU.Correspondingly, other than other IoT equipment, WiFi AP can To receive IP flows.DRU 1152,1154,1156,1162,1164,1166 can be that software is configurable, and can be low Power (for example,+18dBm/ch ,+23dBm/ch etc.), middle power (for example,+30dBm/ch ,+37dBm/ch etc.) or high power (for example,+43dBm/ch ,+46dBm/ch etc.).They can provide channelizing processing, the capacity routing of demand and IP backhaul (examples Such as, 1Gbps, 10Gbps, higher bandwidth etc.).Low-power DRU (for example, hd 18-4) is broadband or narrowband (for example, covering Frequency range from 150MHz to 70GHz), have for example up to and the instant bandwidth higher than 100MHz, have flexible channel Positioning is single, a quarter or 1/8th frequency ranges/channel, has antenna integrated and WiFi AP and provides IP backhauls.In Power (for example, hd 30-4) and high power (for example, Hd 43-4) DRU are narrowband, four frequency range RU, can be with indoor or outdoors day Line and WiFi AP communication, and can have for example up to and the instant bandwidth higher than 100MHz.DRU 1152,1154, 1156,1162,1164,1166 can be, for example, any kind of remote unit as described herein.

Figure 12 is the schematic block diagram for showing multi-operator C-RAN 1200 according to an embodiment of the invention.C-RAN 1200 provide core networks 1202,1204,1206 (such as EPC networks) and are set including mobile device, public safety equipment and WiFi Connection between standby user equipment.Core network 1202 is connected to the ponds operation BBU 1212 and the center of forward pass interface 1215 Operator 1210 of office.Core network 1202 can be transmitted by GbE backhauls, such as using 6/7 cables of CAT, be connected to central office fortune Seek the ponds BBU 1212 of quotient 1210.The ponds BBU 1212 may include one or more Base Band Unit (BBU) 1213,1214.

Core network 1204 is connected to another central office operator 1220, and the central office operator 1220 operates BBU Pond 1222 and forward pass interface 1225.Core network 1202 can be transmitted by GbE backhauls, such as using 6/7 cables of CAT, be connected It is connected to the ponds BBU 1222 of central office operator 1220.The ponds BBU 1222 may include one or more Base Band Unit (BBU) 1223, 1224。

Core network 1206 is connected to another central office operator 1230, and central office operator 1230 operates the ponds BBU 1232 and forward pass interface 1235.Core network 1202 can be transmitted by GbE backhauls, such as using 6/7 cables of CAT, be connected To the ponds BBU 1232 of central office operator 1230.The ponds BBU 1232 may include one or more Base Band Unit (BBU) 1233, 1234。

In other words, each central office operator 1210,1220,1230 is respectively provided with the respective ponds BBU and forward pass interface, And the backhaul to core network 1202,1204,1206.Although showing and being described as including to be connected to three central office operations Quotient 1210,1220,1,230 three core networks 1202, and 1204,1206, it is contemplated that according to an embodiment of the invention, It can implement any amount of core network and central office operator.In some embodiments, central office operator 1210, 1220,1230 can be located at the position far from core network 1202,1204,1206.

Each in the ponds BBU 1212,1222,1232 is logical with one or more forward pass interfaces 1215,1225,1235 respectively Letter.Forward pass interface 1215,1225,1235 may include for exchanging (for example, routeing input port to output port) and/or road By any method of packetization and/or transportation protocol of (for example, using source and destination address scheme).Exemplary forward pass interface 1215,1225,1235 may include interchanger and/or the routing of CPRI on CPRI, ORI, Ethernet, Ethernet etc. Device.In some embodiments, forward pass interface 1215,1225,1235 can be included respectively on a single chip.In some implementations In example, forward pass interface 1215,1225,1235 can be included in as rack installing type unit on a plate or multiple plates.Before Interface 1215,1225,1235 is passed to be based on to realize using DMU (for example, DMU 1216,1217,1226,1227,1236,1237) The exchange and routing CPRI groupings (payload I/Q data, control ＆ management data, data header information, IP communications etc.) of grouping. Forward pass interface 1215,1225,1235 is directly communicated with various positions, and with use such as 10, the interface mark of 40 or 100Gbps Another DMU 1242 of accurate another position is communicated.

DMU 1216,1217,1226,1227,1236,1237,1242 in one embodiment based on packetizing agreement come It realizes opening API, and provides, for example, every wavelength is up to and the interface higher than 10Gbps.DMU 1216,1217,1226,1227, 1236,1237,1242 provide the integrated Wave division multiplexing (WDM) for such as 40Gbps and 100Gbps.DMU 1242 and one A or multiple DRU (for example, DRU 1252,1254,1256,1262,1264,1266) are connected with interface.DMU 1242 and DRU 1252,1254,1256,1262,1264,1266 can be located remotely from core network 1202,1204,1206 and/or central office A part for the access network 1240 of the one or more positions of operator 1210,1220,1230.In the present embodiment, DMU 1242 can be from multiple and different 1210,1220,1230 aggregated contents of central office operator, and the content of aggregation is sent to one A or multiple DRU 1252,1254,1256,1262,1264,1266, operator is unknowable.In other words, about Figure 11 institutes The embodiment shown and described is related to single operator C-RAN, and is related to multi-operator C-RAN about embodiment shown in Figure 12.

Forward pass interface 1215,1225,1235 may include arbitrary DMU described herein.DMU 1216,1217, 1226,1227,1236,1237,1242 have Forwarding plane and control plane.Forwarding plane includes by C＆M (control and management) The routed path by DMU of configuration.In some embodiments, C＆M configurations are located in cloud as further described herein, still These functions can be configured alternatively in the server, as described further on this.C＆M each DMU input and Routed path is established between output.

DMU 1216,1217,1226,1227,1236,1237, which can be configured to receive, comes from one or more BBU 1213,1214,1223,1224,1233,1234 multiple signals.DMU 1216,1217,1226,1227,1236,1237 can be with Extraction is intended for the subset of multiple signals of specific DRU 1252,1254,1256,1262,1264,1266, such as by C＆M information Specified, as further described herein.DMU 1216,1217,1226,1227,1236,1237 can be by the subset of multiple signals It is gathered into stream, and the stream is routed to one or more DRU 1252,1254,1256,1262,1264,1266.The stream can be with It is routed to one or more DRU 1252,1254,1256,1262,1264,1266 via DMU 1242.In some embodiments In, before stream is routed to one or more DRU 1252,1254,1256,1262,1264,1266,1242 decomposable asymmetric choice nets of DMU The stream, such as back in the subset of signal.As shown in figure 12, DMU 1242 can with DRU 1252,1254,1256,1262, 1264,1266 juxtapositions together, for example, being located remotely from the position of DMU 1216,1217,1226,1227,1236,1237.

In one embodiment, DMU 1242 can be removed.In other words, 1216 DMU, 1217,1226,1227, 1236,1237 can be routed directly to the stream one or more DRU 1252,1254,1256,1262,1264,1266.At this In embodiment, forward pass interface 1215,1225,1235 can be communicated directly with DRU.The DRU can be with the additional DRU of one or more It is connected or be deployed in star like arrangement by daisy chain type.

DRU 1252,1254,1256,1262,1264,1266 can be with one or more IP/IoT equipment or one or more Application communication, and support can be provided for Information Mobile Service, public safety band and WiFi.In one embodiment, WiFi AP and/ Or one or more IP/IoT equipment can receive IP flows from RU.Correspondingly, other than other IoT equipment, WiFi AP can To receive IP flows.DRU 1252,1254,1256,1262,1264,1266 can be that software is configurable, and can be low Power (for example,+18dBm/ch ,+23dBm/ch etc.), middle power (for example,+30dBm/ch ,+37dBm/ch etc.) or high power (for example,+43dBm/ch ,+46dBm/ch etc.).They can provide channelizing processing, the capacity routing of demand and IP backhaul (examples Such as, 1Gbps, 10Gbps, higher bandwidth etc.).Low-power DRU (for example, hd 18-4) is broadband or narrowband (for example, covering Frequency range from 150MHz to 70GHz), have for example up to and the instant bandwidth higher than 100MHz, have flexible channel Positioning is single, a quarter or 1/8th frequency ranges/channel, has antenna integrated and WiFi AP and provides IP backhauls.In Power (for example, hd30-4) and high power (for example, Hd43-4) DRU are narrowband, four frequency range RU, can be with indoor or outdoors antenna And WiFi AP communication, and can have for example up to and the instant bandwidth higher than 100MHz.DRU 1252,1254, 1256,1262,1264,1266 can be, for example, any kind of remote unit as described herein.

Figure 13 is the schematic block diagram for showing cloud radio access network 1300 according to an embodiment of the invention.Cloud RAN 1300 offer core networks 1310 (such as EPC networks) and the user including mobile device, public safety equipment and WiFi equipment set Connection between standby.Core network 1310 is transmitted by GbE backhauls, such as using 6/7 cables of CAT, is connected to data center 1315.Data center 1315 may include one or more virtual BBU (vBBU) 1320 and one or more forward pass interfaces 1340. In one embodiment, virtual BBU 1320 is implemented using ready-made data server.Forward pass interface 1340 may include herein Described in any DMU or DRU.DMU 1352 (and inside of forward pass interface 1340) and DRU 1362,1364,1366, 1372,1374,1376 have Forwarding plane and control plane.Forwarding plane define by C＆M configure by DMU's and DRU Routed path.In one embodiment, C＆M configurations are located in cloud, but these functions can be configured alternatively and remotely taken It is engaged in device 1345.C＆M establishes routed path between the outputting and inputting of each DMU and DRU.

Data center 1315 realizes via software defined network (SDN) 1330, and provides remote control and management function.It changes Sentence is talked about, and the control of forward pass interface 1340 can be handled in cloud.Forward pass interface 1340 implement DMU and DRU between based on point Exchange and routing (Forwarding plane) grouping of group.In some embodiments, forward pass interface 1340 can be respectively included in single On chip.In some embodiments, forward pass interface 1340 can be included on a plate or be installed as rack on multiple plates Formula unit.

Forward pass interface 1340 may include the one or more DMU such as further described herein in regard to Figure 11 and Figure 12, and It can be configured to receive multiple signals from one or more virtual BBU 1320.The DMU of forward pass interface 1340 can extract meaning Subset of the figure for multiple signals of specific DRU 1362,1364,1366,1372,1374,1376, is such as specified by C＆M information , as further described herein.The subset of multiple signals can be gathered into stream by the DMU of forward pass interface 1340, and by the stream It is routed to one or more DRU 1362,1364,1366,1372,1374,1376.The stream can be route via DMU 1352 To one or more DRU 1362,1364,1366,1372,1374,1376.In some embodiments, stream is being routed to one Or before multiple DRU 1362,1364,1366,1372,1374,1376, flowed described in 1352 decomposable asymmetric choice nets of DMU, such as back to letter Number subset in.As shown in figure 12, DMU 1352 can via DMU 1352 and DRU 1362,1364,1366,1372,1374, 1376 juxtapositions, for example, being located remotely from the position of forward pass interface 1340.

In one embodiment, DMU 1352 can be removed.In other words, the DMU of forward pass interface 1340 can be straight by the stream It connects and is routed to one or more DRU 1362,1364,1366,1372,1374,1376.In the present embodiment, forward pass interface 1340 It can directly be communicated with DRU.The DRU can connect or be deployed in star like arrangement with the additional DRU of one or more by daisy chain type In.

Data center 1315 directly communicates with various positions, and with use such as 10,40 or 100Gbps interface standards DMU 1352 at one position is communicated.DMU 1352 implements opening API based on packetizing agreement, and provides, for example, per wave Length is up to and the interface higher than 10Gbps.DMU 1352 provides multiple for the integrated wavelength division multiplex of such as 40Gbps and 100Gbps With (WDM).DMU 1352 and one or more DRU (for example, DRU 1362,1364,1366,1372,1374,1376) is with interface Connection.DMU 1352 and DRU 1362,1364,1366,1372,1374,1376 can be the one or more positions being located remotely from Set a part for the access network 1350 at place.

DRU 1362,1364,1366,1372,1374,1376 can be with one or more IP/IoT equipment or one or more Application communication, and support can be provided for Information Mobile Service, public safety band and WiFi.In one embodiment, WiFi AP and/ Or one or more IP/IoT equipment can receive IP flows from RU.DRU 1362,1364,1366,1372,1374,137 can be with Be that software is configurable, and can be low-power (for example,+18dBm/ch ,+23dBm/ch etc.), middle power (for example,+ 30dBm/ch ,+37dBm/ch etc.) or high power (for example,+43dBm/ch ,+46dBm/ch etc.).They can provide channelizing Processing, the capacity routing of demand and IP backhauls (for example, 1Gbps, 10Gbps etc.).Low-power DRU (for example, hd18-4) is broadband Or (for example, covering frequency range) from 150MHz to 70GHz of narrowband, have for example up to and the instantaneous band higher than 100MHz Width has the positioning of flexible channel, is single or a quarter frequency range/channel, has antenna integrated and WiFi AP and provides IP Backhaul.Middle power (for example, hd30-4) and high power (for example, Hd43-4) DRU are narrowband, four frequency range RU, can with it is indoor or Exterior aerial and WiFi AP communication, and can have for example up to and the instant bandwidth higher than 100MHz.DRU 1362, 1364,1366,1372,1374,1376 can be, for example, any kind of remote unit as described herein.

Compared with other embodiments and routine RAN, embodiment shown in Figure 13 has for substantially reducing of dispatching Equipment amount.For example, embodiment shown in Figure 13 is not necessarily required to UBiT and RFC.

Figure 14 is the simplified flowchart of the control and management (C＆M) method that show RAN according to an embodiment of the invention 1400.In some embodiments, some or all of C＆M functions shown in flow chart 1400 can be real in cloud network It applies, as further described herein.In step 1410, the definition signal at DMU.Although described as appearance " at DMU ", but It is it is contemplated that can be by remote server and/or by being inserted directly into DMU, (for example, by internet on cloud Application) definition signal.

Figure 15 is the exemplary user interface of the signal in a kind of embodiment of the step 1410 for defining Figure 14 1500 screenshot capture.As shown in figure 15, selection DMU (" O1_HostQS-Cw01 ").The DMU selected in fig.15 be by The four frequency units that the frequency band of 700MHz, 850MHz, 1900MHz and AWS define.Signal can by their centre frequency, bandwidth, Initiation culture-stop frequency, table, figure etc. define.In fig.15, the pre-filled table of the band defined by management body is selected (for example, " 700-A 698-704/728-734MHz ").It can also be determined by assigning title (for example, " ATT-700-B-S1 ") The justice signal.

In some embodiments, it is checked at the step 1410 of Figure 14, the quantity to ensure defined signal is small In or equal to the accessible signals of DMU maximum quantity.If the quantity of defined signal is more than the maximum quantity of signal, It can notify the user of the definition of request signal.

Once defining signal, so that it may signal is distributed to specific DRU.The step 1412 of Figure 14 is selected for each DRU Signal is selected.Imagination by remote server and/or can be inserted directly into one or more DRU, (for example, passing through on cloud Application on internet) distribution signal.

Figure 16 is the exemplary user interface of selection signal in an embodiment for the step 1412 in Figure 14 1600 screenshot capture.As shown in figure 16, selection DRU (" hd30-11 ").The DRU selected in figure 16 be by 700MHz, The four frequency units that the frequency band of 850MHz, 1900MHz and AWS define.Combobox allows user according in step 1410 distributing Their title (for example, " ATT-700-A-S1 ") selection signal from the pond of all signals defined in step 1410.It is logical It crosses and selects specific signal name, will be handled on the specific DRU corresponding to the signal of the signal name.

In some embodiments, it can be checked at the step 1412 of Figure 14, it is small with the quantity for ensuring signals selected In or equal to the accessible signals of DRU maximum quantity.It, can be with if signals selected quantity is more than the maximum quantity of signal Notify the user of request selecting signal.In some embodiments, it can be checked at the step 1412 of Figure 14, to ensure to use Being less than or equal in the signals selected total bandwidth of the DRU clusters fed from the DMU of step 1410 can be between DMU and DRU Optical link on the maximum bandwidth of signal that transmits.If total bandwidth is more than maximum bandwidth, request selecting signal can be notified User.

Once having selected signal for one or more DRU, then serial data stream can be created.In the step 1414 of Figure 14 In, based on the selected signal at DMU, data flow is formed for each DRU or DRU clusters.Although described as generation " At DMU ", it is envisioned that by remote server and/or be inserted directly into DMU, it can be on cloud (for example, by internet Application) definition signal.Therefore, selected signal can be routed to the one or more specified in step 1412 from DMU DRU。

Figure 17 is the overall schematic block diagram of cloud RAN according to the ... of the embodiment of the present invention.Core network 1710 is via GbE backhauls (including virtual BBU 1722, forward pass connect with data center 1715 (including virtual BBU 1717), local data center 1720 for transmission Mouthful 1726 and SDN 1724) and million data centers 1730 (including virtual BBU 1732, forward pass interface 1736 and SDN 1734) it communicates.Data center 1715, local data center 1720 and million data centers 1730 using the forward pass of packetizing transmit with Outdoor and interior DAS coverings are provided at various positions 1740,1752,1754,1756,1760.Cloud RAN can shown in Figure 17 For example implemented about component shown in Figure 13 with using.

It should be understood that example as described herein and embodiment being merely to illustrate property purpose, and the various modifications under its enlightenment Or variation will be suggested to those skilled in the art, and it is included within spirit herein and clause and appended claims In the range of.

Annex I is terms used herein table, including acronym.

Nomenclature

ACLR adjacent channels reveal ratio

ACPR adjacent channel power ratios

ADC modulus digital quantizers

AQDM analog quadrature demodulators

AQM analogue quadrature moducators

AQDMC analog quadrature demodulator correctors

AQMC analogue quadrature moducator correctors

BPF bandpass filters

CDMA CDMAs

CFR crest factors reduce

DAC digital analog converters

DET detectors

DHMPA digital hybrid mode power amplifiers

DDC digital down converters

DNC low-converters

DPA Doherty power amplifiers

DQDM digital orthogonal demodulators

DQM digital quadrature modulators

DSP Digital Signal Processing

DUC digital up converter

EER envelopes are eliminated and are repaired

EF envelopes are followed

ET envelope-trackings

EVM error vector magnitudes

FFLPA feedforward linear power amplifiers

FIR finite impulse responses

FPGA field programmable gate arrays

GSM is used for the global system of mobile communication

I-Q inphase/orthogonals

IF intermediate frequencies

LINC uses the Linear Amplifer of non-linear element

LO local oscillators

LPF low-pass filters

MCPA Multi-Carrier Power Amplifiers

The multidirectional search of MDS

OFDM Orthodoxy Frequency Division Multiplexs

PA power amplifiers

PAPR peak-to-average power ratios

PD Digital base-band pre-distortions

PLL phaselocked loops

QAM quadrature amplitude modulations

QPSK quadrature phase shift keying

RF radio frequencies

RRH remote radio-frequency heads

RRU remote radio frequency head units

SAW surface acoustic wave filters

UMTS Universal Mobile Communication System

UPC upconverter

WCDMA wideband code division multiple access

WLAN WLANs

Claims (20)

1. a kind of system, including：

First forward pass interface, the first forward pass interface includes multiple first digital multiplex cells D MU, wherein the multiple Each the first DMU in first DMU is configured to：

Multiple first signals are received from the first Base Band Unit BBU；

Extract the first subset of the multiple first signal；

First subset of the multiple first signal is gathered into first-class；With

First-class it is routed to the first DRU of one or more of multiple first digital remote units DRU by described.

2. system according to claim 1 further comprises：

Second forward pass interface, the second forward pass interface include multiple 2nd DMU, wherein each in the multiple 2nd DMU A 2nd DMU is configured to：

Multiple second signals are received from the 2nd BBU；

Extract the second subset of the multiple second signal；

The second subset of the multiple second signal is gathered into second；With

The second is routed to the 2nd DRU of one or more of the multiple DRU.

3. system according to claim 2, wherein the first forward pass interface is associated with the first operator and described Second forward pass interface is associated with the second operator.

4. system according to claim 2, further comprises：

3rd DMU, wherein the third DMU is between the first forward pass interface and one or more of first DRU, Described in the 3rd DMU between the second forward pass interface and one or more of 2nd DRU, and the wherein described third DMU is configured to：

It is received from the first DMU in the multiple first DMU described first-class；

Decompose it is described first-class, wherein first-class to be routed to one or more of first DRU be via the third by described DMU；

The second is received from the 2nd DMU in the multiple 2nd DMU；

The second is decomposed, wherein it is via the third that the second, which is routed to one or more of 2nd DRU, DMU。

5. system according to claim 4, first-class described the of the multiple first signal is broken down into wherein described One subset, and the wherein described second is broken down into the second subset of the multiple second signal.

6. system according to claim 4, wherein the third DMU and the multiple DRU juxtapositions.

7. system according to claim 6, wherein before the third DMU and the multiple DRU are located remotely from described first Pass the position of interface and the second forward pass interface.

8. system according to claim 1, wherein first BBU is virtual BBU.

9. system according to claim 1, wherein the control and management of each the first DMU of the multiple first DMU C＆M functions are implemented in cloud network.

10. system according to claim 1, wherein control and the management C＆M functions of each DRU of the multiple DRU Implement in cloud network.

11. system according to claim 1, wherein the first forward pass interface is implemented on one or more chips.

12. system according to claim 1, wherein the multiple first signal is multiple digital signals.

13. a kind of method, including：

Multiple first signals from the first Base Band Unit BBU are received at the first digital multiplex cells D MU；

The first subset of the multiple first signal is extracted by the first DMU；

First subset of the multiple first signal is gathered by the first DMU first-class；With

By the first DMU first-class one or more of multiple first digital remote units DRU are routed to by described One DRU.

14. according to the method for claim 13, wherein first-class being routed to one or more DRU by described and including：

Be streamed to the 2nd DMU by described first by the first DMU, wherein second DMU decompose it is described it is first-class simultaneously First-class it is sent to one or more of DRU by described.

15. according to the method for claim 14, decomposing institute wherein second DMU receives the second from the 3rd DMU It states second and the second is sent to the 2nd DRU of one or more of the multiple DRU.

16. according to the method for claim 15, wherein first DMU and the 3rd DMU and different operator's phases Association.

17. according to the method for claim 14, wherein second DMU and the multiple DRU juxtapositions.

18. according to the method for claim 17, wherein second DMU and the multiple DRU are located remotely from described first The position of DMU.

19. according to the method for claim 13, wherein the control of first DMU and management C＆M functions are in cloud network Implement.

20. according to the method for claim 13, wherein first DMU is included on chip.