CN104581446B - The method and apparatus that direct communication between base stations are supported in PON system - Google Patents

The method and apparatus that direct communication between base stations are supported in PON system Download PDF

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Publication number
CN104581446B
CN104581446B CN201310479115.9A CN201310479115A CN104581446B CN 104581446 B CN104581446 B CN 104581446B CN 201310479115 A CN201310479115 A CN 201310479115A CN 104581446 B CN104581446 B CN 104581446B
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China
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onu
pon
data frames
base station
uplink
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CN201310479115.9A
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Chinese (zh)
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CN104581446A (en
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肖司淼
黄喜
梁铮
张凯宾
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上海诺基亚贝尔股份有限公司
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Abstract

The method and apparatus that the present invention provides a kind of to support direct communication between base stations in PON system.Support that the method for direct communication between base stations includes in ONU wherein in PON system:Receive from source base station associated with the ONU, to go to the base station of target BS between interaction data;Interaction data between base station is encapsulated as uplink PON data frames according to the tunneling of the PON system, and will be in the ONU information flags to the frame head of uplink PON data frames of target ONU associated with target BS;Uplink PON data frames are sent to the OLT of PON system.

Description

The method and apparatus that direct communication between base stations are supported in PON system

Technical field

The present invention is generally related to passive optical network (PON), more specifically, is related to supporting base station in PON system Between direct communication method and apparatus.

Background technology

Long term evolution (Long Term Evolution, LTE) or the universal land radio access web (Evolved of evolution Universal Terrestrial Access Network, E-UTRAN) it is evolved packet system (Evolved Packet System, EPS) access part, be considered as the mainstream wireless solution after 3G.Fig. 1 is shown to be closed by the third generation Make the overall network architecture that Partnership Program (3rd Generation Partnership Project, 3GPP) alliance is formulated 100 (seehttp://www.3gpp.org/) schematic diagram.As shown in fig. 1, each base station (eNB) is interconnected by X2 interface, And core net (mobility management entity (MME) of such as core net/gateway (S-GW)) is led to by S1 interfaces.It can see Go out, this is a kind of flat structure.

Wherein, X2 interface is a kind of interface of new definition, in the wireless access network before LTE and is not present.From patrolling From the point of view of volume viewpoint, it is the interface of the point-to-point between two base stations in a kind of E-UTRAN, is defined to be convenient for adjacent base Direct communication between standing.Since LTE is complete IP network, so each base station is considered as the physics with particular ip address and leads to Believe unit.X2 interface business needs to route and forward at L3 layers by IP addressing.

With the development of mobile Internet, a kind of main trend is that end-to-end peer-to-peer communications and localization business will be complete Play the part of even more important role in portion's data throughout.To produce the requirements at the higher level for X2 interface, as bigger capacity, Shorter time delay etc..Many operators and equipment vendor show great interest, such as China Unicom to this field.

The mobile service increased rapidly, such as 3G/LTE make the current return network based on dedicated link tend to be saturated.This A problem finally needs to solve in such a way that website is connected with some form of optical fiber, and the sooner the better.With use The initial deployment scheme that special optic fibre connects website is compared other than cost is lower, is also had using PON network connection website It is safe, scalable, meet the advantages of future network evolving path, to attract more and more attentions.In addition, using PON Network had not only carried user resident business but also had carried the mixed mode of operation of mobile retransmission business, has apparent collaboration advantage, is Mobile and fixed network operator/offer commercial city brings economic balance point, while also highly beneficial to terminal user (" Exploiting PONs for mobile backhaul, IEEE Communications Magazine, 2013 ").

Therefore, the direct communication between base station how is effectively realized in mixed user resident/mobile retransmission network (that is, how realizing X2 interface) becomes one and needs the major issue solved.

Fig. 2 shows the signals of the typical architecture of the PON system 200 for the user resident/mobile retransmission for being currently used in mixing Figure.As shown in Figure 2, PON system 200 includes OLT210, one or more ONU220 (such as ONU1、ONU2、……、ONUn), with And optical branching/combiner (SPL) 230.It (is illustratively shown in figure in addition, also showing one or more base stations 240 in Fig. 2 ENB1And eNB2) and core net edge router 250.

In framework shown in fig. 2, frequency between base station 240 and time synchronization in mobile retransmission network can borrow Help synchronizing to realize between corresponding ONU220 and OLT210, wherein for gigabit passive optical network (GPON) G.984.3 specification and in the G.987.3 specification of 10 gigabit passive optical networks (XGPON) respectively between ONU and OLT It synchronizes and is described, then (MAC) entity of the media access control in ONU is to base station tranmitting data register and synchronizing information (" High accurately synchronized λ-tunable WDM/TDM-PON using timestamps based time and Frequency synchronization for mobile backhaul, OFC, 2013 ") to complete the synchronization between base station.

In current systems, when OLT210 is from a source base station (such as eNB1) when receiving IP data packets, it can only will It is transmitted to the edge router 250 of core net, and then the data are forwarded a packet to target by edge router 250 by IP addressing Base station (such as eNB2), as shown in the phantom line segments in Fig. 2.

Invention content

As can be seen that in above-mentioned realization, the PON system 200 for accessing part is only that LTE business provides physical transfer Jie Matter, without any routing and processing function.

Therefore, this scheme remains following disadvantage:

(1) in this network vertically disposed, all base station to station services are subjected to " access net-> core nets- > access net " process, it is this it is valueless come transmission back will generate huge time delay.

(2) all data services must converge to core net, even if certain data packets only need to pass through intra-cellular.When When this localization data business is more and more, it will generate serious signaling and data traffic pressure to core net, simultaneously also A large amount of transfer resources can be consumed.

(3) control and management of base station to station service are carried out at core network edge (that is, edge router), this cannot Change real-time adjustresources allocation strategy according to the load of access net.

Although IP packet forwarding capabilities can be realized into OLT, in this case, it is necessary to configure OLT to support L3 to control Function processed, this directly still involves great expense.In addition, processing of L3 layers of the processing also than L2 layers is more slowly.

In view of the above problems, the present invention proposes one kind by the way that " L3 layers of inter base station communications " are mapped as " L2 layers of ONU Between communicate " and by OLT using the agreement of PON system be forwarded come in PON system support direct communication between base stations side Case.

According to the first aspect of the invention, it provides in a kind of ONU in PON system and supports direct communication between base stations Method, including:Receive from source base station associated with the ONU, to go to the base station of target BS between interaction data;Root Interaction data between base station is encapsulated as uplink PON data frames according to the tunneling of the PON system, and will be associated with target BS Target ONU ONU information flags to the frame head of uplink PON data frames in;Uplink PON data frames are sent to PON system OLT。

According to the second aspect of the invention, it provides in a kind of OLT in PON system and supports direct communication between base stations Method, including:Receive the uplink PON data frames from source ONU;The frame head of uplink PON data frames is parsed to determine whether to wrap The information of ONU containing target;When in the frame head for determining uplink PON data frames including target ONU information, according to target ONU information Downlink PON data frames are directly created with the payload of uplink PON data frames, without handling payload;By downlink PON data frames are broadcast to all ONU in PON system.

According to the third aspect of the present invention, it provides in a kind of ONU in PON system and supports direct communication between base stations Device, including:Receiving unit, be configured as receiving it is from source base station associated with ONU, to go to target BS Interaction data between base station;Encapsulation unit is configured as being encapsulated as interaction data between base station according to the tunneling of PON system Uplink PON data frames, and by the frame head of the ONU information flags of target ONU associated with target BS to uplink PON data frames In;Transmission unit is configured as uplink PON data frames being sent to the OLT of PON system.

According to the fourth aspect of the present invention, it provides in a kind of OLT in PON system and supports direct communication between base stations Device, including:Receiving unit is configured as receiving the uplink PON data frames from source ONU;Resolution unit is configured To parse the frame head of uplink PON data frames to determine whether including target ONU information;Downlink frame creating unit, is configured as When in the frame head for determining uplink PON data frames including target ONU information, according to target ONU information and uplink PON data frames Payload directly create downlink PON data frames, without handling payload;Transmission unit, be configured as by Downlink PON data frames are broadcast to all ONU in PON system.

Using the solution of the present invention, fast and low-cost can be realized in mixed user resident/mobile retransmission network Direct interaction between base station, to alleviate the growing pressure for core net.

Description of the drawings

It, will be more preferable geographical after description by the specific implementation mode below with reference to the present invention given by following drawings The solution present invention, and other objects of the present invention, details, features and advantages will become apparent.In the accompanying drawings:

Fig. 1 shows the schematic diagram for the E-UTRAN overall network architectures that 3GPP alliances are developed;

Fig. 2 shows the schematic diagrames of the typical architecture of the PON system for the user resident/mobile retransmission for being currently used in mixing;

Fig. 3 shows the allusion quotation of the PON system for mixed user resident/mobile retransmission according to embodiment of the present invention The schematic diagram of type frame structure;

Fig. 4 shows the stream of the method that direct communication between base stations are supported in PON system according to embodiment of the present invention Cheng Tu;

Fig. 5 shows the XGEM frames that direct communication between base stations are supported in XGPON systems according to embodiment of the present invention Frame structure schematic diagram;

Fig. 6 shows the dress that direct communication between base stations are supported in the ONU in PON system according to embodiment of the present invention The schematic diagram set;

Fig. 7 shows the dress that direct communication between base stations are supported in the OLT in PON system according to embodiment of the present invention The schematic diagram set.

Specific implementation mode

The basic thought of the present invention is to be mapped to " L3 layers of inter base station communications " " communicating between L2 layers of ONU ", and It is directly forwarded at L2 layers using the agreement of PON system by OLT.

The present invention is described below with reference to Fig. 3 and Fig. 4.Fig. 3 is shown according to embodiment of the present invention for mixing The schematic diagram of the typical architecture of the PON system 300 of user resident/mobile retransmission.Fig. 4 is shown according to embodiment of the present invention The flow chart of the method 400 of direct communication between base stations is supported in PON system.

Since standardization body suggests that next-generation passive optical network (NGPON2) should reuse XGPON (NGPONl) as far as possible Agreement, therefore in figure 3 and in the following description using XGPON systems as PON system 300 for this hair is described It is bright, it will be appreciated by those skilled in the art that return network is not limited to XGPON, but can be applied to have similar Encapsulation mechanism other arbitrary PON systems, such as be selected as NGPON2 main frame time-division wavelength division multiplexed light net Network (Time and Wavelength Division Multiplexed Passive Optical Network, TWDM- PON)。

As shown in Figure 3, XGPON systems 300 include OLT310, one or more ONU320 (such as ONU1、ONU2、……、 ONUn) and SPL330.In addition, also showing one or more base stations 340 in Fig. 3 (illustratively shows eNB in figure1、 eNB2And eNB3) and core net edge router 350.Wherein, each base station 340 in wireless network and corresponding ONU320 It is connected to support mobile retransmission.OLT310 is connected with edge router 350, and the frequency and time synchronization of base station 340 can pass through XGPON's synchronizes to realize.

It is below eNB with source base station1(itself and ONU1It is connected, therefore also can be by ONU1Referred to as source ONU), target BS be eNB2(itself and ONU2It is connected, therefore also can be by ONU2Referred to as target ONU) for come describe the direct X2 interface between base station communication, It will be appreciated by those skilled in the art that the present invention is not limited thereto, and it can be achieved between meaning base station in office or appoint Between meaning ONU.

Method 400 is described with reference next to Fig. 4.First, in step 410, ONU1It receives and comes from base associated there Stand eNB1, to go to target BS eNB2Base station between interaction data.

In step 420, work as ONU1Determine that received data is target BS eNB to be gone to2Base station between interaction data When, which is encapsulated as by uplink PON data frames according to the tunneling of PON system 300, and will be with target BS eNB2It is related Target ONU (the ONU of connection2) ONU information flags to the frame head of uplink PON data frames in.

In one embodiment, ONU1In be previously stored with instruction PON system 300 in all ONU and wireless network In base station between correspondence address table so that ONU1It can be found and target base by searching for the address table Stand eNB2Corresponding target ONU ONU2ONU information.

In one embodiment, ONU information includes ONU ID.In one embodiment, base station can pass through base station IP address identify.

Constructed address table is for example as shown in Table 1 below.The address table gives the IP of the base station in wireless network Mapping one by one between the ONUID (L2 layers) of address (L3 layers) ONU corresponding in return network, and thus makes it possible to will L3 layers of base station to station service is mapped as business between L2 layers of ONU.

1 address table of table

ENB IP address Associated ONU ID IP@eNB1 1 IP@eNB2 2 IP@eNB3 3 …… ……

The address table can be built by OLT in the activation of return network, and the information in ONU or base station becomes Change (such as be newly added, exit or IP reassign etc.) when update.And it is possible to address table structure after or every time update All ONU in PON system are notified later.However, the present invention is not limited thereto, but can be by access net even core net In other network elements create and/or update address table, as long as the network element can will create and/or newer Location table is notified to OLT and ONU.

In addition, although the IP address of certain base station can dynamically distribute, as long as however, it is still associated with same ONU, Then its physical transmission path will not change, and corresponding ONU ID also do not change.

It is described by taking ONU ID and base station IP address as an example above, it will be appreciated by those skilled in the art that ONU Information, which can also include arbitrary other, can identify the parameter of ONU, such as target XGEM port ids, also, base station can be with It is identified by base station IDs, base station MAC etc., without departing from protection scope of the present invention.

In XGPON300 shown in fig. 3, tunneling is, for example, G.987.3 " MPLS over specified in specification XGEM " agreements.In this case, G.987.3 interaction data (X2 interface IP packets) is advised by basis between the base station from source base station " MPLS over XGEM " protocol encapsulation in model is uplink XGEM frames, and marks target in the frame head of uplink XGEM frames The ONU information of ONU.

Since source ONU knows the IP address of target BS, it can find correspondence by searching for address above mentioned table Target ONU ONU ID, then the ONU ID of target ONU are marked in the frame head of uplink XGEM frames.Fig. 5 shows root According to the signal of the frame structure 500 of the XGEM frames for supporting direct communication between base stations in XGPON systems 300 of embodiment of the present invention Figure.As shown in Figure 5, the new uplink XGEM frames and the normal upstream XGEM frames structure having the same in XGPON, difference Place is only in that the part (such as 10 bits) of " Options " field in the frame head using XGEM frames to indicate target ONU ONU information (such as ONU ID).

In this way, the L3 routings of X2 interface are mapped as the routings of the L2 in PON.

Next, in step 430, ONU1OLT310 uplink PON data frames being sent in PON system 300.

For XGPON systems 300, it is configured to the uplink XGEM frames of direct communication between base stations in this way Uplink XGTC burst frames can be assembled into, so as regular upstream XGEM frames and/or together with regular upstream XGEM frames After be sent to OLT310.

ONU is come from receiving1Uplink PON data frames after, in step 440, OLT310 is by parsing uplink PON The frame head of data frame is to determine whether including target ONU information.

For example, OLT310 can not have to the payload for the uplink XGEM frames that processing receives, but only parsing should The Options fields of the frame head of XGEM frames determine whether ONU information (such as ONU of target ONU for including target ONU ID), it is to be used for base station to station service or routine XGPON business to distinguish the uplink XGEM frames received.

In step 450, when in the frame head for determining received uplink PON data frames including target ONU information, OLT310 directly creates downlink PON data frames according to the payload of target ONU information and uplink PON data frames.

For example, when in the frame head of the uplink XGEM frames received including the ONUID of target ONU, it is determined that the uplink XGEM frames are the uplink XGEM frames for base station to station service, need to be transmitted to target ONU as early as possible.OLT310 will not handle it effectively Load, but the payload and target ONU information is utilized directly to create a downlink XGEM frame.In downlink XGEM frame heads " XGEM port ids " field is created according to " the target ONU ID " that is provided in the uplink XGEM frame heads from source ONU.In one kind In embodiment, XGEM port ids and ONU ID are numerically identical.

In addition, in step 450, when not including target ONU information in the frame head for determining the uplink PON data frames received When, the payload of uplink PON data frames is handled.For example, when not including mesh in the frame head of the XGEM frames received When marking the ONUID of ONU, it is determined that the XGEM frames are the XGEM frames for conventional XGPON business, and OLT310 will be according to G.987.3 The predetermined processing of the specification payload simultaneously creates downlink XGEM frames.

It is configured to the downlink XGEM frames of base station to station service and the downlink for being used for routine XGPON business in this way XGEM frame structures are identical.

Next, in step 460, downlink PON data frames are broadcast to all ONU in PON system 300 by OLT310.

For XGPON systems 300, downlink XGEM frames for direct communication between base stations that OLT310 is created can be with As conventional downlink XGEM frames and/or together with conventional downlink XGEM frames, downlink XGTC burst frames are assembled into, are then made It is broadcast to all ONU with the downstream wavelength of PON system 300.

In step 470, after receiving the downlink PON data frames that OLT310 is broadcasted, ONU (such as ONU2) should by identification Port id in the frame head of downlink PON data frames is directed toward the PON data frames of their own to filter out.For example, for above-mentioned XGPON For system 300, ONU2By identify downlink XGEM frame heads in " XGEM port ids " field come determine the XGEM frames whether be It is directed toward the XGEM frames of their own.

In step 480, when determined after being decapsulated between downlink PON data frames its payload be for base station industry It is engaged in, then ONU2Business datum between the base station unsealed is sent to corresponding base station, such as eNB2

In one embodiment, in the IP data packets obtained after being parsed to the payload of downlink PON data frames Contain ONU2Corresponding base station eNB2IP address (can be found by address table), it is determined that the data frame be used for base station to station service , and the IP data packets are sent to eNB2;If not containing base station eNB in the IP data packets2IP address, it is determined that the data Frame is for common XGPON business, from without being sent to corresponding eNB2

Fig. 6, which is shown, to be supported directly to lead between base station in the ONU320 in PON system 300 according to embodiment of the present invention The schematic diagram of the device 600 of letter.Device 600 for example may be implemented in ONU1In or by ONU1It realizes.

As shown in Figure 6, device 600 includes receiving unit 610, is configured as receiving and comes from and ONU1Associated source Base station eNB1, to go to target BS eNB2Base station between interaction data;Encapsulation unit 620 is configured as according to PON systems Interaction data between the base station is encapsulated as uplink PON data frames by the tunneling of system 300, and will be with target BS eNB2It is associated Target ONU ONU2ONU information flags to the frame head of uplink PON data frames in;Transmission unit 630, be configured as by Uplink PON data frames are sent to the OLT310 of PON system 300.

In one embodiment, device 600 further includes:Storage unit 640 is configured as prestoring instruction PON The address table of the correspondence between base station 340 in ONU320 and wireless network in system 300.

In one embodiment, address table is built by the activation of return network, and in PON system 300 ONU320 or wireless network in the information of base station 340 update when changing.

In one embodiment, the information of ONU320 or base station 340 changes including at least one in the following terms :ONU or base station be newly added, exit or IP is reassigned.

In one embodiment, encapsulation unit 620 is configured to search for address table to find and target BS eNB2Phase The ONU information of corresponding target ONU.

Fig. 7, which is shown, to be supported directly to lead between base station in the OLT310 in PON system 300 according to embodiment of the present invention The schematic diagram of the device 700 of letter.Device 700 for example may be implemented to realize in OLT310 or by OLT310.

As shown in Figure 7, device 700 includes:Receiving unit 710 is configured as receiving the uplink PON from source ONU Data frame;Resolution unit 720 is configured as the frame head of parsing uplink PON data frames to determine whether comprising target ONU letters Breath;Downlink frame creating unit 730 is configured as when in the frame head for determining uplink PON data frames including target ONU information, Downlink PON data frames are directly created according to target ONU information and the payload of uplink PON data frames, without having to described Effect load is handled;Transmission unit 740, the downlink PON data frames for being configured as to be created are broadcast to PON system 300 In all ONU.

In one embodiment, downlink frame creating unit 730 is additionally configured to when the frame head for determining uplink PON data frames In do not include target ONU information when, the payload of uplink PON data frames is handled.

In one embodiment, transmission unit 740 is configured with the downstream wavelength of PON system 300 to broadcast down Row PON data frames.

In one embodiment, device 700 further includes:Storage unit 750 is configured as prestoring instruction PON The address table of the correspondence between base station 340 in ONU320 and wireless network in system 300.

In above detailed description, it is described by taking GPON classes system (such as GPON, XGPON, NGPON2) as an example, however It will be understood by those skilled in the art that the principle of the present invention can be similar be applied to EPON class systems (such as EPON, 10G-EPON Deng), although EPON classes system has different protocol architecture and frame structure from GPON class systems.

In one or more exemplary designs, this can be realized with hardware, software, firmware or their arbitrary combination The application function.If realized with software, can be stored the function as one or more instruction or code On a computer-readable medium, or as on computer-readable medium one or more instructions or code transmit.It calculates Machine readable medium includes computer storage media and communication media, and wherein communication media includes contributing to computer program from one Place is transmitted to the arbitrary medium of another place.Storage medium can be general or specialized computer-accessible arbitrary available Medium.This computer-readable medium may include, such as, but not limited to, RAM, ROM, EEPROM, CD-ROM or other CD Storage device, disk storage equipment or other magnetic storage apparatus, either can be used for general or specialized computer or it is general or The form of the addressable instruction of application specific processor or data structure come code modules desired by carrying or store it is arbitrary its Its medium.Also, it is arbitrary to connect the computer-readable medium that be known as.For example, if software be using coaxial cable, The wireless technology of optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or such as infrared ray, radio and microwave etc is come from net It stands, server or other remote sources transmission, then coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless The wireless technology of electricity and microwave etc is also included in the definition of medium.

General processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate can be used Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or for executing sheet The arbitrary combination of function described in text come realize or execute various illustrative logical blocks, module in conjunction with described in the disclosure and Circuit.General processor can be microprocessor, alternatively, processor can also be any conventional processor, controller, micro-control Device or state machine processed.Processor can also be embodied as the combination of computing device, for example, DSP and microprocessor combine, are multiple Microprocessor, the combination of one or more microprocessors and DSP core or any other such structure.

Those of ordinary skill in the art should also understand that, the various illustrative logics described in conjunction with embodiments herein Electronic hardware, computer software or combination may be implemented into block, module, circuit and algorithm steps.In order to understand earth's surface Show this interchangeability between hardware and software, various illustrative components, block, module, circuit and step are enclosed above General description has been carried out around its function.It is implemented as hardware as this function and is also implemented as software, depends on specific Using and apply design constraint over the whole system.Those skilled in the art can be directed to each specific application, to become Logical mode realizes described function, and still, this realization decision should not be interpreted as causing a departure from the scope of this disclosure.

The above description of the disclosure is for enabling any those of ordinary skill of this field to realize or use the present invention.It is right For those of ordinary skill in the art, the various modifications of the disclosure will be apparent from, and generality defined herein Principle can also be applied to other deformations in the case of without deviating from the spirit and scope of the disclosed invention.Therefore, the present invention is simultaneously It is not limited to example as described herein and design, but it is consistent with the widest scope of principle disclosed herein and novel features.

Claims (18)

1. a kind of method that direct communication between base stations are supported in optical network unit (ONU) in passive optical network (PON) system, Including:
Receive from source base station associated with the ONU, to go to the base station of target BS between interaction data;
Interaction data between the base station is encapsulated as uplink PON data frames according to the tunneling of the PON system, and will be with institute In the ONU information flags to the frame head of the uplink PON data frames for stating the associated target ONU of target BS;
The uplink PON data frames are sent to the optical line terminal (OLT) of the PON system.
2. the method as described in claim 1 indicates the ONU in the PON system and nothing wherein being previously stored in the ONU The address table of the correspondence between base station in gauze network.
3. method as claimed in claim 2, wherein described address table are built by the activation of return network, and in institute It states when the information of the base station in the ONU in PON system or described wireless networks changes and updates.
4. method as claimed in claim 3, wherein the information of the ONU or base station change including in the following terms extremely One item missing:ONU or base station be newly added, exit or IP is reassigned.
5. method as claimed in claim 2, wherein by the ONU information flags of target ONU associated with the target BS Frame head to the uplink PON data frames includes:
Described address table is searched for find the ONU information of target ONU corresponding with the target BS.
6. a kind of method that direct communication between base stations are supported in optical line terminal (OLT) in passive optical network (PON) system, Including:
Receive the uplink PON data frames from source optical network unit (ONU);
The frame head of the uplink PON data frames is parsed to determine whether including target ONU information;
When in the frame head for determining the uplink PON data frames including target ONU information, according to target ONU information and described The payload of uplink PON data frames directly creates downlink PON data frames, without handling the payload;
All ONU downlink PON data frames being broadcast in the PON system.
7. method as claimed in claim 6, further including:
When not including target ONU information in the frame head for determining the uplink PON data frames, to the uplink PON data frames Payload is handled.
8. method as claimed in claim 6, wherein broadcasting the downlink PON data frames and including:Using under the PON system Traveling wave is grown to broadcast the downlink PON data frames.
9. method as claimed in claim 6, indicating the ONU in the PON system and nothing wherein being previously stored in the OLT The address table of the correspondence between base station in gauze network.
10. supporting the dress of direct communication between base stations in a kind of optical network unit (ONU) in passive optical network (PON) system It sets, including:
Receiving unit, be configured as receiving it is from source base station associated with the ONU, to go to the base station of target BS Between interaction data;
Encapsulation unit is configured as being encapsulated as interaction data between the base station according to the tunneling of the PON system Row PON data frames, and by the ONU information flags of target ONU associated with the target BS to the uplink PON data frames Frame head in;
Transmission unit is configured as the uplink PON data frames being sent to the optical line terminal (OLT) of the PON system.
11. device as claimed in claim 10, wherein described device further include:
Storage unit is configured as prestoring between the base station indicated in ONU and wireless network in the PON system The address table of correspondence.
12. device as claimed in claim 11, wherein described address table are built by the activation of return network, and The information of the base station in ONU or described wireless networks in the PON system updates when changing.
13. device as claimed in claim 12, wherein the information of the ONU or base station changes including in the following terms At least one of:ONU or base station be newly added, exit or IP is reassigned.
14. device as claimed in claim 11, wherein the encapsulation unit be configured to search for described address table with find with The ONU information of the corresponding target ONU of target BS.
15. supporting the dress of direct communication between base stations in a kind of optical line terminal (OLT) in passive optical network (PON) system It sets, including:
Receiving unit is configured as receiving the uplink PON data frames from source optical network unit (ONU);
Resolution unit is configured as parsing the frame head of the uplink PON data frames to determine whether including target ONU information;
Downlink frame creating unit, it includes target ONU information to be configured as working as in the frame head for determining the uplink PON data frames When, downlink PON data frames are directly created according to target ONU information and the payload of the uplink PON data frames, without right The payload is handled;
Transmission unit is configured as all ONU being broadcast to the downlink PON data frames in the PON system.
16. device as claimed in claim 15, wherein the downlink frame creating unit is additionally configured to when the determining uplink When not including target ONU information in the frame head of PON data frames, the payload of the uplink PON data frames is handled.
17. device as claimed in claim 15, wherein the transmission unit is configured with the down going wave of the PON system It grows to broadcast the downlink PON data frames.
18. device as claimed in claim 15, wherein described device further include:
Storage unit is configured as prestoring between the base station indicated in ONU and wireless network in the PON system The address table of correspondence.
CN201310479115.9A 2013-10-14 2013-10-14 The method and apparatus that direct communication between base stations are supported in PON system CN104581446B (en)

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