CN106888513B - Forward pass network and data transmission method - Google Patents
Forward pass network and data transmission method Download PDFInfo
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- CN106888513B CN106888513B CN201611209301.0A CN201611209301A CN106888513B CN 106888513 B CN106888513 B CN 106888513B CN 201611209301 A CN201611209301 A CN 201611209301A CN 106888513 B CN106888513 B CN 106888513B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
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- H04W88/085—Access point devices with remote components
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Abstract
It includes: access type forward pass transmission node FTN-ACC that the embodiment of the present invention, which provides a kind of forward pass network and data transmission method, the forward pass network, for connecting with radio frequency remote unit RRU；Convergent type forward pass transmission node FTN-AGG, one end are connect with the FTN-ACC, and the other end is connect with baseband processing unit pond BUUs；Established between the FTN-ACC and the FTN-AGG at least there are two types of with different propagation delay times transmission channel；The FTN-ACC and/or FTN-AGG selects the corresponding transmission channel to be transmitted specifically for the delay requirement according to data.Forward pass network FTN-ACC and FTN-AGG have been divided into inventive embodiments, and it is provided with a variety of transmission channels, corresponding channel transfer can be selected according to the propagation delay time of data, on the one hand it can satisfy the propagation delay time of different data, on the other hand the zero load that transfer resource can be reduced as far as possible, promotes the effective rate of utilization of transfer resource.
Description
Technical field
The present invention relates to network technique field more particularly to a kind of forward pass network Front-haul Transport
Network, FTN) and data transmission method.
Background technique
Forward pass network (Front-haul Transport Network, FTN) is a kind of positioned at Remote Radio Unit
Transmission network between (Remote Radio Unite, RRU) and baseband processing unit (Base Band Unite, BBU).Institute
It states the front end FTN to connect with the RRU, rear end is connect with the pond BBU that multiple BBU are formed.
In the prior art, there are several ways in the FTN connection RRU and the pond BBU:
The first: by the way of fiber direct connection, being attached between each pond RRU and BBU using a pair of of optical fiber, this
If sample, optical fiber logarithm used in FTN is more, and the availability of single pair optical fiber is low.
Second: in such a way that glory is direct-connected, multiple RRU, which share a pair, can transmit the optical fiber of different wave length, with institute
The pond BUU is stated to be attached.The direct-connected mode of glory needs each base station to distribute different wavelength, is difficult to meet certain pairs of biographies in this way
The transmission demand of the high business of defeated delay requirement.
The third: using be based on existing transmission net, such as: optical transfer network (OpticalTransportNetwork, OTN) or
Packet Transport Network (Packet Transport Network, PTN) provides the scheme of forward pass carrying.At present at OTN or PTN node
Time delay is managed all in 50us or more, and business most sensitive in forward pass network wishes end-to-end time delay within 100us, it is clear that it is difficult
When meeting multi-hop networking the needs of such low time delay.
Therefore propose that one kind can either meet propagation delay time demand, and before fault location and/or maintenance cost can be reduced
Passing network is prior art urgent problem to be solved.
Summary of the invention
In view of this, being at least partly used for an embodiment of the present invention is intended to provide a kind of forward pass network and data transmission method
It solves the above problems.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
First aspect of the embodiment of the present invention provides a kind of forward pass network, comprising:
Access type forward pass transmission node FTN-ACC, for being connect with radio frequency remote unit RRU；
Convergent type forward pass transmission node FTN-AGG, one end are connect with the FTN-ACC, the other end and baseband processing unit
Pond BUUs connection；
Established between the FTN-ACC and the FTN-AGG at least there are two types of with different propagation delay times transmission channel；
The FTN-ACC and/or FTN-AGG selects the corresponding transmission channel specifically for the delay requirement according to data
It is transmitted.
Based on above scheme, loop network or Star Network are established between the FTN-ACC and the FTN-AGG.
Based on above scheme, the transmission channel includes at least two in direct channel, common-use tunnel and hybrid channel；
The direct channel are as follows: use the transfer resource of predistribution to carry out data transmission between origin node and destination node straight
Pass channel；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is described
When FTN-AGG, the destination node is the FTN-ACC；
The common-use tunnel are as follows: be all made of dynamic allocation of transmission resource between two transmission nodes of arbitrary neighborhood and transmitted
Statistic multiplexing channel；Wherein, the common-use tunnel is the transmission path between two FTN-ACC or the FTN-ACC
With the transmission path between the FTN-AGG；
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is adopted between transmission node
The path transmitted with scheduled pre-assigned transfer resource；The shared path is between transmission node using dynamic point
The path that the transfer resource matched is transmitted；The transmission node is the FTN-ACC or FTN-AGG.
Based on above scheme, the transfer resource includes transmission wavelength or transmission time slot；
The transmission time slot includes the transmission time of transmission wavelength application.
Based on above scheme, the transmission channel further includes protection channel；
Wherein, spare logical when the protection channel is for as the direct channel and/or the direct access path failure
Road.
Based on above scheme, the forward pass network further includes controller；
The controller is used for when the transmission channel failure, using operation management OAM mechanism in the transmission channel
Two transmission nodes of arbitrary neighborhood between positioning failure.
Based on above scheme, the FTN-ACC includes forward pass network interface NGFI；Wherein, the NGFI and RRU connects
It connects；
The forward pass network further includes controller；
The NGFI, for obtaining load condition information；
The controller, for according to the load condition information, the different types of transmission channel of dynamic configuration.
Second aspect of the embodiment of the present invention provides a kind of data transmission method, is applied in forward pass network, the forward pass net
Network includes: the access type forward pass transmission node FTN-ACC connecting with radio frequency remote unit RRU, and respectively with the FTN-ACC and
The convergent type forward pass transmission node FTN-AGG of baseband processing unit pond BUUs connection；The described method includes:
According to the delay requirement of data, the transmission channel between the FTN-ACC and the FTN-AGG is established in selection；
Using the transmission channel, the data are sent.
Based on above scheme, the transmission channel includes at least two in direct channel, common-use tunnel and hybrid channel；
The direct channel are as follows: use the transfer resource of predistribution to carry out data transmission between origin node and destination node straight
Pass channel；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is described
When FTN-AGG, the destination node is the FTN-ACC；
The common-use tunnel are as follows: be all made of dynamic allocation of transmission resource between two transmission nodes of arbitrary neighborhood and transmitted
Statistic multiplexing channel；Wherein, the common-use tunnel is the transmission path between two FTN-ACC or the FTN-ACC
With the transmission path between the FTN-AGG；
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is adopted between transmission node
The path transmitted with scheduled pre-assigned transfer resource；The shared path is between transmission node using dynamic point
The path that the transfer resource matched is transmitted；The transmission node is the FTN-ACC or FTN-AGG；
The propagation delay time according to data, it is logical that the transmission between the FTN-ACC and the FTN-AGG is established in selection
Road, including following at least two:
When the delay requirement corresponds to the first propagation delay time, the direct channel is selected；
When the delay requirement corresponds to the second propagation delay time, the hybrid channel is selected；
When the delay requirement corresponds to third propagation delay time, the common-use tunnel is selected；
Wherein, first propagation delay time is less than second propagation delay time；
Second propagation delay time is less than the third propagation delay time.
Based on above scheme, the method also includes:
When the transmission channel failure of selection, data described in protection channel transfer are utilized.
Based on above scheme, the method also includes:
Obtain load state information；
According to the load state information, transmission channel described in dynamic configuration.
Based on above scheme, the method also includes:
When the transmission channel failure, using operation management OAM mechanism at arbitrary neighborhood two of the transmission channel
Positioning failure between transmission node.
Forward pass network and data transmission method provided in an embodiment of the present invention will connect the forward pass network FTN of RRU and BBU,
It divides for FTN-ACC and FTN-AGG, and foundation has at least two transmission channels between these two types of transmission nodes, both biographies
The propagation delay time in defeated channel is different and the effective rate of utilization of transfer resource is also different, when carrying out data transmission, according to data
Delay requirement selects corresponding transmission channel to be transmitted, and on the one hand can satisfy the delay requirement of data transmission in this way, another
Aspect can improve the effective rate of utilization of transfer resource as far as possible, thus the satisfaction of the delay requirement of data transmission well,
The zero load for reducing transfer resource simultaneously, improves the effective use of resource.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the first FTN and BBUs and RRU provided in an embodiment of the present invention；
Fig. 2 is the structure of FTN provided in an embodiment of the present invention a kind of and the schematic diagram of FTN and BBUs and RRU；
Fig. 3 is the structure of another kind FTN provided in an embodiment of the present invention and the schematic diagram of FTN and BBUs and RRU；
Fig. 4 is a kind of network topology schematic diagram of FTN provided in an embodiment of the present invention；
Fig. 5 is the transmission channel schematic diagram of FTN provided in an embodiment of the present invention；
Fig. 6 is transmission channel provided in an embodiment of the present invention and the correspondence schematic diagram for protecting channel；
Fig. 7 is a kind of schematic diagram of positioning failure provided in an embodiment of the present invention；
Fig. 8 is the structure and connection schematic diagram of FTN-ACC provided in an embodiment of the present invention and RRU and PTN node；
Fig. 9 is a kind of flow diagram of data transmission method provided in an embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments of the specification.
As shown in Figure 1, the present embodiment provides a kind of one end forward pass network FTN, FTN to be connected to RRU, the other end is connected to
BBUs.As shown in Figures 2 and 3, the FTN is again can include:
Access type forward pass transmission node FTN-ACC 110, for being connect with radio frequency remote unit RRU；
Convergent type forward pass transmission node FTN-AGG 120, one end is connect with the FTN-ACC, the other end and Base-Band Processing
Unit cells BUUs connection；
Establish at least that there are two types of with different propagation delay times between the FTN-ACC 110 and the FTN-AGG 120
Transmission channel；The FTN-ACC110 and/or FTN-AGG 120, specifically for the delay requirement according to data, selection pair
The transmission channel answered is transmitted.
Two or more transmission channels is at least configured between the FTN-ACC and FTN-AGG in the present embodiment, in this reality
Applying transmission channel described in example all can be logical channel.
Different transmission channels has different propagation delay times, in this case, either described when carrying out business transmission
The FTN-ACC or FTN-AGG can be selected according to the delay requirement of the data of current transmission corresponding transmission channel into
Row data transmission, to meet the propagation delay time of different data.
If data are transferred to the FTN-AGG from the FTN-ACC, the user equipment (UE) for corresponding to wireless side is uploaded to
The upstream data of base station is as transmitted to the downlink data of UE if being transferred to FTN-ACC from the FTN-AGG under base station.
It is configured at least two transmission channels in the present embodiment.The propagation delay time for the transmission channel being typically different is different,
Then the effective rate of utilization of corresponding transfer resource is also different.Usual propagation delay time is smaller, then the effective rate of utilization of transfer resource is just
Lower, if propagation delay time is bigger, the effective rate of utilization of transfer resource is higher.In the present embodiment the FTN-ACC with it is described
At least two transmission channels are configured between FTN-AGG, in this case, the business high to certain delay requirements utilizes as far as possible
The small channel transfer of propagation delay time, and the business low for delay requirement, so that it may according to the delay requirement of data when meeting
While prolonging requirement, the biggish transmission channel of propagation delay time is selected, to promote the effective use of transfer resource to greatest extent, thus
The transmission delay on the one hand ensuring various data may be implemented, on the other hand promote effective benefit of transfer resource to greatest extent
With.Obviously do not have to a pair of of optical fiber of foundation between each RRU and BUU thus to be transmitted, without all using using color
Optical fiber is unable to satisfy the problem of certain business demands.
For example, as shown in Figure 1, the data may include the ideal forward data that ideal forward pass RRU is sent and non-ideal
The non-ideal forward data of forward pass RRU transmission.The ideal forward data needs the transmission channel transmission small using propagation delay time,
And the slightly larger transmission channel transmission of the high still propagation delay time of resource utilization then can be used in the non-ideal forward data.
As shown in figure 3, FTN and wireless network can all be divided into forwarding domain and management domain；Management domain is managed for network,
Forwarding domain is carried out data transmission based on the management of management domain.In the present embodiment, the management domain of the FTN and wireless network is separation
, wireless management domain manage RRU and BBUs, forward pass network management domain manage FTN data forwarding, for example, according to data when
Prolong requirement, corresponding channel transfer etc. is selected to manage.General common interface (Common Public Radio is shown in Fig. 3
Interface, CPRI), it can be used for connecting BBU and RRU.
In the present embodiment, loop network or Star network are established between the FTN-ACC 110 and the FTN-AGG 120
Network.Shown in Fig. 4 is a loop network.
If establishing loop network, multiple FTN-ACC 110 and a FTN-AGG 120 form a cyclic annular knot
Structure, data can be transferred on multiple FTN-ACC 110 from a FTN-AGG 120, can also be from multiple described
FTN-ACC 110 is transferred on the FTN-AGG 120.
Certainly, the hub-and-spoke configuration is then: the FTN-AGG 120 is the center of hub-and-spoke configuration, can there is multiple FTN-
ACC 110 is connected thereto, but between FTN-ACC 110, may not form connection closed loop.
In some embodiments, as shown in figure 5, the transmission channel includes direct channel 101, common-use tunnel 102 and mixes
Close at least two in channel 103；
The direct channel 101 are as follows: carried out data transmission between origin node and destination node using the transfer resource of predistribution
The channel that direct transfers；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is
When the FTN-AGG, the destination node is the FTN-ACC.
The direct channel 101 can correspond directly to be located at a FTN-ACC110 connecting with RRU in the present embodiment
Interface channel between FTN-AGG 120, the intermediate node on the interface channel receive data and only carry out thoroughly to data
Forwarding is passed, parsing, identification and the distribution of transfer resource of data are no longer carried out.In direct channel 101, transfer resource is preparatory
Distribution, if the data that intermediate node is received with the transmission resources for transmitting, just directly basis is pre-configured with and is forwarded to next
Transmission node can't extract the destination address in the data packet, then carry out current transmission resource situation binding purpose address into
The operation of row distribution.Obviously, in this case, the propagation delay time of direct channel is short and certain, and the transmission of low time delay may be implemented.But
It is that transfer resource is allocated in advance, the phenomenon that wasting of resources may occurs when low delay data are less.
The common-use tunnel 102 are as follows: dynamic allocation of transmission resource progress is all made of between two transmission nodes of arbitrary neighborhood
The statistic multiplexing channel of transmission；Wherein, the common-use tunnel is the transmission path or described between two FTN-ACC
Transmission path between FTN-ACC and the FTN-AGG.
The transfer resource of common-use tunnel 102 is to dynamically distribute, any one transmission node is receiving on common-use tunnel 102
To after a data packet, need to extract the relevant information in data packet, for example, destination address, in conjunction with current load condition,
A transfer resource is dynamically distributed, next transmission node is transferred to, it is clear that this propagation delay time is uncertain, and due to each
Transmission node requires to carry out parsing, identification and the Resource dynamic allocation of data packet, and propagation delay time is larger.But this share is led to
Road 102, can maximized transfer resource effective use, and save transmission power consumption as far as possible.For example, ought transmit at present
When data volume is few, so that it may transmit control plane signaling using this transmission channel, close part transmission channel, transmission channel is closed
It closes, corresponding equipment, which does not just have to need to provide power consumption, maintains the transmission channel, so as to save power consumption.Here the biography of closing
Defeated channel can be direct channel 101, or the common-use tunnel 102.Plane signaling is controlled using the transmission channel, from
And effective transmission can be promoted.And direct channel 101 above-mentioned is equivalent to designated lane, is assigned exclusively to certain data or certain
The transmission channel of equipment, the data type for being equivalent to transmission also quite determines, once it is determined that can not just carry out the biography of other data
It is defeated, if its data that can be transmitted is few, it is clear that certain wasting of resources may be will lead to.
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is adopted between transmission node
The path transmitted with scheduled pre-assigned transfer resource；The shared path is between transmission node using dynamic point
The path that the transfer resource matched is transmitted；The transmission node is the FTN-ACC or FTN-AGG.
For example, it is described ideal forward data need using propagation delay time it is small direct channel transmission, and it is described it is non-ideal before
Passing data then can be used the high still slightly larger common-use tunnel of propagation delay time of resource utilization or hybrid channel transmission.
The transfer resource includes transmission wavelength or transmission time slot；The transmission time slot includes the transmission of transmission wavelength application
Time.
The FTN can be optical fiber transmission network, and optical fiber transmission network is transmitted using light wave.It is different during transmission
The broadcast of wavelength is just one kind of the transfer resource.
For from time dimension, each described light wave can be carried out it is time-multiplexed, therefore combine transmission wavelength and biography
The defeated time, so that it may form transmission time slot one by one.Therefore the classification of direct channel 101, direct access path or common-use tunnel 102,
It can be different and determine for the method for salary distribution of transfer resource.
The direct channel 101, which is equivalent to, is pre-configured with transfer resource, both knows about once configuring entire FTN, works as reception
To the data of this transmission resources for transmitting, transmission node can no longer carry out the parsing of data and the basis of identification and resource allocation
On, it is known which transmission node needed to be transmitted to, it is clear that be achieved that the low time delay transparent transmission of data.
In some embodiments, the transmission channel further includes protection channel；Wherein, the protection channel is used for when described
Alternate channel when direct channel and/or the direct access path failure.
The transmission channel further includes protection channel in the present embodiment, and protection channel can substantially be referred to as spare logical again
Road, the design of alternate channel can be used for carrying out the transmission of corresponding data when direct channel or direct connected link failure, to ensure
The propagation delay time of data.
In the present embodiment in order to promote the effective rate of utilization of transfer resource, the zero load of transfer resource is reduced.In this implementation
It, can also be logical using the configuration mode configuration protection of 1:N in addition to the configuration mode configuration protection channel using 1:1 in example
Road.The N is the item number of the direct channel 101 or direct access path, and described 1 is the number for protecting channel.The N can be
Integer not less than 2.In this case, it is achieved that multiple transmission channels share a protection channel, realizes effectively mentioning for resource
It rises.In the present embodiment, the protection channel can be a kind of specific channel of the direct channel.For example, the protection channel
Transfer resource be preconfigured.In specific implementation, the protection channel may be a kind of the special logical of common-use tunnel
Road, for example, the transfer resource in the protection channel is one kind of dynamic allocation of resources, resource is once assigned, transmission money
Source is suitable for any one transmission node, and transmission node carries out transparent transmission when carrying out data forwarding.
Certainly in specific implementation, common common-use tunnel 102 can be used directly in the protection channel.In this case, exist
In transmission process, the controller of FTN once finds some direct channel 101 or direct access path failure, then directly enables and share
Channel 102 carries out data transmission, and in this case, does not configure privacy protection channel, can promote transfer resource to greatest extent
Effective use, reduce the transmission power consumption of FTN.
If FTN is loop network structure, when some operation wavelength sets up a transmission channel in clockwise direction, then
The protection channel of the transmission channel can be established in the counterclockwise direction.As shown in fig. 6, the transmission node of FTN, A, B, C, D, E are built
A loop network is found.Here the transmission node of FTN includes FTN-ACC and FTN-AGG.Operation wavelength λ 1 and protection wavelength X
11, form a pair of of transmission channel and protection channel；Operation wavelength λ 2 and protection wavelength X 12 form another pair transmission channel and
Protect channel；Operation wavelength λ 3 and protection wavelength X 13 form another pair transmission channel and protection channel；Operation wavelength λ 4 and guarantor
Shield wavelength X 14 forms another transmission channel and protection channel.
In some embodiments, the forward pass network further includes controller；For example, the controller can be software defined network
Network (Software Defined Network, SDN) controller.
The controller, for any phase when transmission channel failure, using operation management OAM mechanism in the channel
Positioning failure between adjacent two transmission nodes.For example, the controller, can be specifically used for when the direct channel and/or described
When direct access path failure, arbitrary neighborhood two using operation management OAM mechanism in the direct channel and/or direct access path are passed
Positioning failure between defeated node.
When being positioned, the controller is specifically used for control m Detection wavelength in the 1st transmission and m transmission node
Between transmit detection data, wherein the m be less than M；The transmission node sum that the M is passed through by a transmission path.Example
Such as, the M is equal to 4, then utilizes 4 different wavelength, detected between the 1st transmission node and the 2nd transmission node respectively,
For example, the first transmission node sends detection data using the 1st Detection wavelength, the 2nd transmission node is being connect using the first Detection wavelength
After receiving the detection data, feedback data is sent；According to detection data and the transmission of the feedback data based on detection data
Situation, so that it may determine whether the two transmission nodes break down and abort situation.For example, the 2nd transmission node does not connect
Receive detection data, it is clear that break down the chain of the 1st transmission node or the 1st transmission node to the 2nd transmission node road.If the 2nd
Transmission node receives detection data, but the 1st detection node does not receive feedback data, therefore may be that the 2nd transmission node goes out
There is failure in existing failure or return path.As feedback data and feedback path it is corresponding be physical layer same root optical fiber or
Interface, it is clear that be exactly the 2nd transmission node fault.And so on according to OAM mechanism, easy can quickly orient fault point.
As shown in fig. 7, can use wavelength X 1, wave in transmission node A, transmission node B, transmission node C, transmission node D
Long λ 2, wavelength X 3 and wavelength X 4 carry out the fault location between corresponding transmission node respectively, realize operation management.
As shown in figure 8, the forward pass network further includes controller and the forward pass network interface NGFI connecting with the RRU.
N NGFI is shown in fig. 8, is numbered respectively from NGFI 1, NGFI 2 ... NGFI n.The NGFI, for obtaining load
Condition information；The RRU and BUUs can be considered the wireless side of wireless network；The NGFI be and the RRU or BUUs
The interface of connection.The NGFI interface can detecte load condition information in the present embodiment, for example, can be according to the day of RRU
The comprehensive load condition information for determining current FTN such as line number, modulation system.Here load condition information can be to be able to reflect
The traffic load of the FTN or the information of traffic load rate.
Multiplexer Mux and demultiplexer DeMux are also shown in fig. 8.Display is there are three types of channel in Fig. 8, respectively pair
Answer the intermediate node of direct channel penetrate wavelength, correspond to hybrid channel part intermediate node penetrate wavelength and correspond to altogether
With the packet switch in channel.FTN-ACC is different according to the channel of selection, is mapped respectively.The channel that CH is indicated in fig. 8,
The number of CH, for example, 1,2,3 and 4, number of the channel indicated in corresponding node.Usual FTN is fiber optic network,
RRU receives the electromagnetic signal of terminal transmission, it may be necessary to carry out node electric layer processing, be converted into optical signal transmission.
The controller, for according to the load condition information, the different types of transmission channel of dynamic configuration.
The controller will be according to information on load, the different types of transmission channel of dynamic configuration, and dynamic configuration here passes
Defeated channel, it may include increase transmission channel, reduce transmission channel.Specific configuration mode, it may include increase the biography of corresponding channel
Defeated resource, or the transfer resource of corresponding channel is reduced, so that the dynamic configuration in channel is realized, to meet under different loads situation
Transmission demand, so that the unnecessary unloaded situation of FTN transmission is reduced, to reduce the waste of the transfer resource of FTN, specifically such as
Light device can be distributed with close portion, so that transmission or the activating part luminaire of specific wavelength are reduced, to realize some
The activation of transmission wavelength.The controller can also realize the dynamic of transmission channel by adjusting the transmission bandwidth of each wavelength
State configuration.The load state information may include radio bearers index；The radio bearers index is reflection radio bearers ratio
Information.
The present embodiment provides a kind of data transmission methods, and using in forward pass network, the forward pass network includes: and penetrates
The access type forward pass transmission node FTN-ACC of frequency extension unit RRU connection, and respectively with the FTN-ACC and Base-Band Processing list
The convergent type forward pass transmission node FTN-AGG of first pond BUUs connection.In short, data transmission method described in the present embodiment is application
In the method for forward pass network above-mentioned.
As shown in Figure 9, which comprises
Step S110: according to the delay requirement of data, selection is established between the FTN-ACC and the FTN-AGG
Transmission channel；
Step S120: the transmission channel is utilized, the data are sent.
Method described in the present embodiment can be the method for the control plane applied to FTN-ACC or FTN-AGG.Firstly, described
FTN-ACC or FTN-AGG will acquire the delay requirement of data, for example, being determined according to the type of service of data, receiving interface etc. should
The delay requirement of data；Then further according to the delay requirement, selection meets the transmission channel of the delay requirement of the data, a side
Face can satisfy the delay requirement of data, on the other hand can promote the effective rate of utilization of transfer resource as far as possible.In step
Control plane can control Forwarding plane using corresponding transmission channel in S120, carry out data transmission.
In some embodiments, the transmission channel includes at least two in direct channel, common-use tunnel and hybrid channel
It is a；The direct channel are as follows: logical using the direct transferring of carrying out data transmission of transfer resource of predistribution between origin node and destination node
Road；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is the FTN-
When AGG, the destination node is the FTN-ACC；
The common-use tunnel are as follows: be all made of dynamic allocation of transmission resource between two transmission nodes of arbitrary neighborhood and transmitted
Statistic multiplexing channel；Wherein, the common-use tunnel is the transmission path between two FTN-ACC or the FTN-ACC
With the transmission path between the FTN-AGG；
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is adopted between transmission node
The path transmitted with scheduled pre-assigned transfer resource；The shared path is between transmission node using dynamic point
The path that the transfer resource matched is transmitted；The transmission node is the FTN-ACC or FTN-AGG；
The step S110 may include following at least two:
When the delay requirement corresponds to the first propagation delay time, the direct channel is selected；
When the delay requirement corresponds to the second propagation delay time, the hybrid channel is selected；
When the delay requirement corresponds to third propagation delay time, the common-use tunnel is selected；
Wherein, first propagation delay time is less than second propagation delay time；
Second propagation delay time is less than the third propagation delay time.
Transmission channels different in the present embodiment is equivalent in different transport layers, and being equivalent to will be according to data
Delay requirement carries out Delamination Transmission；It can satisfy the propagation delay time of different data, while being mentioned to greatest extent using Delamination Transmission
It increases salary the effective use in source.Therefore it is high to be directed to delay requirement in the present embodiment, preferentially uses direct channel or hybrid channel
Carry out data transmission；It for the low data of delay requirement, can preferentially be transmitted using common-use tunnel, obviously can be expired in this way
The propagation delay time of sufficient different data, while transfer resource can be utilized to greatest extent.
In some embodiments, the method also includes:
When the transmission channel failure of selection, data described in protection channel transfer are utilized.
If the transmission channel failure selected in the present embodiment, directly initiates protection channel and carries out data transmission, it is clear that
Introduce protection channel, the introducing of this protection mechanism, it can be ensured that in transmission channel failure, still meet the time delay of data
It is required that.
In some embodiments, the method also includes:
Obtain load state information；
According to the load state information, transmission channel described in dynamic configuration.
For example, obtaining the parameters such as the wireless load factor of the RRU using NFGI.It is moved according to the wireless load factor
State configures the transmission channel.For example, according to the load state information, can determine the number of the transmission channel of configuration, root
According to the condition information of the load, it may be determined that the corresponding delay requirement of present load, it may be determined that go out the class of each transmission channel
Type and/or quantity.
In some embodiments, the method also includes: when the transmission channel failure, using operation management OAM machine
System positioning failure between two transmission nodes of arbitrary neighborhood of the transmission channel.
The controller that can use the control plane of FTN in the present embodiment can be with OAM when transmission channel breaks down
Mechanism (i.e. hop-by-hop) positioning failure node by node, so that simple and efficient positioning is out of order.
Several specific examples are provided below in conjunction with above-mentioned any embodiment:
Forward pass transmission network (front-haul transport network, FTN) is passed by access type forward pass in this example
Network element node (FTN-ACC) and convergent type forward pass transmission net node (FTN-AGG) is sent to constitute, FTN-ACC and FTN-AGG can groups
Cyclic l network or Star Network.
Extremely low time delay and big bandwidth required by BBUs are connected to using the RRU of ideal forward pass interface in order to meet, each
A straight-through wavelength channel is established between FTN-ACC and FTN-AGG, while in order to meet non-ideal forward pass interface flexible interconnection
Demand establishes the shared wavelength channel on a point-by-point lower road in ring.Share wavelength channel, the biography in addition to being able to carry out business
Except sending, OAM and the protection agreement that can be also used between FTN-AGG and FTN-ACC are established and are removed.
Access type forward pass transmission net node (FTN-ACC): it is in Service Access point, i.e., is connect with RRU, passes through NGFI
(Next Generation Front-Haul Interface) can connect neighbouring multiple RRU, real-time perception delay sensitive
Business and non-sensitive business, for delay sensitive, the biggish ideal forward pass interface data of bandwidth requirement is mapped directly to and FTN-
The point-to-point direct-connected wavelength of AGG, and the non-ideal forward pass interface insensitive for delay requirement and other business map to point by point
The shared wavelength on lower road.Using reconfigurable optical add/drop multiplexer (Reconfigurable Optical Add-Drop
Multiplexer, ROADM) technology realize node in different wave length flexible dispatching, the straight-through wave to come for other nodes
Long, ROADM is directly bypassed, and for the shared wavelength that other nodes come, ROADM gives on its lower road to the electricity of FTN node
Processing module is further handled.Shared wavelength can be the wavelength for being allocated to common-use tunnel.
Convergent type forward pass transmission net node (FTN-AGG): being in service hub, in a manner of looped network or star-like networking,
The business of multiple and different access layer FTN-ACC is subjected to convergence convergence, and is sent to the pond BBU.FTN-AGG will be under all wavelengths
Road does the electric treatment of FTN node and exchange, and can link with the pond BBU, realizes load and the channel dispatch and wavelength of FTN in the pond BBU
Use dynamic linkage.
In order to realize the forwarding of extremely low time delay, and different business grade distinguished based on time delay, the Forwarding plane of FTN is divided into
Three levels.Corresponding wavelength is mapped directly in access point FTN for the business of extremely low delay requirement, in service access FTN-
It is forwarded, i.e., is transmitted using direct channel in a manner of photosphere break-through between ACC and FTN-AGG.For the industry compared with low time delay
Business, goes to channel layer by photosphere, is done by channel layer and turns to be sent to next node, i.e., is transmitted using hybrid channel.For general
The Packet Service of logical time delay, dispatches via photosphere, after channel layer, then is grouped exchange, i.e., is transmitted using common-use tunnel.
Using the processing framework of layering, it can accomplish that same equipment is realized, the processing towards different delay business.
FTN forwarding surface is for being run basic OAM mechanism, including CC/CV etc. on the photosphere of point-to-point wavelength；By
OAM mechanism is run in the node electric layer respectively jumped jumped.The OAM of photosphere needs to carry out the problem of global alignment is to determine photosphere, so
Relevant fault detection situation is notified by the hop-by-hop transmitting of electric layer afterwards.
Point-to-point operation wavelength is connected, protection wavelength is established, when a failure occurs, protection signaling passes through point-by-point
Shared wavelength transmitted, realize pretection switch.
1) NGFI interface can carry the burden requirement of wireless side, and real-time load factor (is made by antenna for base station number, modulation
Formula, etc. COMPREHENSIVE CALCULATINGs the index to forward pass bandwidth demand) can pass to FTN node by NGFI, the interface of NGFI can be with
Corresponding wireless load factor is adapted to by adjusting the quantity of activation wavelength or channel.
2) NGFI interface can carry different delay requirements, and flow is mapped to different wavelength according to delay requirement
Or in channel.The wavelength of FTN corresponds to different delay requirements and is divided into three classes: mapping to break-through to the channel of extremely low delay requirement
Wavelength is directly connected to former destination node, the direct photosphere break-through of intermediate node；To channel (such as similar X2 interface of higher delay requirement
Lateral flow) map to road wavelength under part of nodes, this wavelength only road under the node for having direct connected link, in other nodes
The road Bu Xia；Lower road wavelength point by point is mapped to other business, on the road each node Dou Xia and packet switch is carried out, realizes abundant
Statistic multiplexing.
The management domain of FTN network using control with management software defined network (Software Defined Network,
SDN) controller, realize wirelessly with the linkage of transmission, according to the practical business demand of network, according to delay requirement, dynamic adaptation
Wavelength and bandwidth.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
Mutual coupling or direct-coupling or communication connection is divided to can be through some interfaces, the INDIRECT COUPLING of equipment or unit
Or communication connection, it can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit, it can and it is in one place, it may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing module, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned include: movable storage device, it is read-only
Memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or
The various media that can store program code such as person's CD.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (12)
1. a kind of forward pass network characterized by comprising
Access type forward pass transmission node FTN-ACC, for being connect with radio frequency remote unit RRU；
Convergent type forward pass transmission node FTN-AGG, one end are connect with the FTN-ACC, the other end and baseband processing unit pond
BUUs connection；
Established between the FTN-ACC and the FTN-AGG at least there are two types of with different propagation delay times transmission channel；It is described
The FTN-ACC and/or FTN-AGG selects the corresponding transmission channel to carry out specifically for the delay requirement according to data
Transmission.
2. forward pass network according to claim 1, which is characterized in that
Loop network or Star Network are established between the FTN-ACC and the FTN-AGG.
3. forward pass network according to claim 1 or 2, which is characterized in that
The transmission channel includes at least two in direct channel, common-use tunnel and hybrid channel；
The direct channel are as follows: logical using the direct transferring of carrying out data transmission of transfer resource of predistribution between origin node and destination node
Road；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is the FTN-
When AGG, the destination node is the FTN-ACC；
The common-use tunnel are as follows: be all made of the system that dynamic allocation of transmission resource is transmitted between two transmission nodes of arbitrary neighborhood
Count multiplex channel；Wherein, transmission path or the FTN-ACC and institute of the common-use tunnel between two FTN-ACC
State the transmission path between FTN-AGG；
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is between transmission node using pre-
The path that fixed pre-assigned transfer resource is transmitted；The shared path is between transmission node using dynamic allocation
The path that transfer resource is transmitted；The transmission node is the FTN-ACC or FTN-AGG.
4. forward pass network according to claim 3, which is characterized in that
The transfer resource includes transmission wavelength or transmission time slot；
The transmission time slot includes the transmission time of transmission wavelength application.
5. forward pass network according to claim 3, which is characterized in that
The transmission channel further includes protection channel；
Wherein, the alternate channel when protection channel is for as the direct channel and/or the direct access path failure.
6. forward pass network according to claim 3, which is characterized in that
The forward pass network further includes controller；
The controller is used for when the transmission channel failure, using operation management OAM mechanism appointing in the transmission channel
It anticipates positioning failure between two neighboring transmission node.
7. forward pass network according to claim 1 or 2, which is characterized in that
The FTN-ACC includes forward pass network interface NGFI；Wherein, the NGFI is connect with the RRU；
The forward pass network further includes controller；
The NGFI, for obtaining load condition information；
The controller, for according to the load condition information, the different types of transmission channel of dynamic configuration.
8. a kind of data transmission method, which is characterized in that be applied in forward pass network, the forward pass network includes: to draw with radio frequency
The access type forward pass transmission node FTN-ACC of remote unit R RU connection, and respectively with the FTN-ACC and baseband processing unit pond
The convergent type forward pass transmission node FTN-AGG of BUUs connection；The described method includes:
According to the delay requirement of data, at least there are two types of have not between the FTN-ACC and the FTN-AGG for selection foundation
With the transmission channel of propagation delay time；
Using the transmission channel, the data are sent.
9. according to the method described in claim 8, it is characterized in that,
The transmission channel includes at least two in direct channel, common-use tunnel and hybrid channel；
The direct channel are as follows: logical using the direct transferring of carrying out data transmission of transfer resource of predistribution between origin node and destination node
Road；When the origin node is the FTN-ACC, the destination node is the FTN-AGG；When the origin node is the FTN-
When AGG, the destination node is the FTN-ACC；
The common-use tunnel are as follows: be all made of the system that dynamic allocation of transmission resource is transmitted between two transmission nodes of arbitrary neighborhood
Count multiplex channel；Wherein, transmission path or the FTN-ACC and institute of the common-use tunnel between two FTN-ACC
State the transmission path between FTN-AGG；
The hybrid channel includes direct access path and shared path；Wherein, the direct access path is between transmission node using pre-
The path that fixed pre-assigned transfer resource is transmitted；The shared path is between transmission node using dynamic allocation
The path that transfer resource is transmitted；The transmission node is the FTN-ACC or FTN-AGG；
The transmission channel between the FTN-ACC and the FTN-AGG is established in the propagation delay time according to data, selection,
Including following at least two:
When the delay requirement corresponds to the first propagation delay time, the direct channel is selected；
When the delay requirement corresponds to the second propagation delay time, the hybrid channel is selected；
When the delay requirement corresponds to third propagation delay time, the common-use tunnel is selected；
Wherein, first propagation delay time is less than second propagation delay time；
Second propagation delay time is less than the third propagation delay time.
10. according to the method described in claim 9, it is characterized in that,
The method also includes:
When the transmission channel failure of selection, data described in protection channel transfer are utilized.
11. according to the method described in claim 8, it is characterized in that,
The method also includes:
Obtain load state information；
According to the load state information, transmission channel described in dynamic configuration.
12. according to the method described in claim 8, it is characterized in that,
The method also includes:
When the transmission channel failure, arbitrary neighborhood two using operation management OAM mechanism in the transmission channel are transmitted
Positioning failure between node.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611209301.0A CN106888513B (en) | 2016-12-23 | 2016-12-23 | Forward pass network and data transmission method |
| PCT/CN2017/118406 WO2018113797A1 (en) | 2016-12-23 | 2017-12-25 | Front-haul transport network, data transmission method, apparatus and computer storage medium |
| JP2019527331A JP6800332B2 (en) | 2016-12-23 | 2017-12-25 | Front hall transmission network, data transmission method and equipment, computer storage medium |
| EP17882822.4A EP3554181B1 (en) | 2016-12-23 | 2017-12-25 | Front-haul transport network, data transmission method, apparatus and computer storage medium |
| KR1020197015273A KR102296176B1 (en) | 2016-12-23 | 2017-12-25 | Fronthaul transmission network, data transmission method and apparatus, computer storage medium |
| US16/466,020 US10972941B2 (en) | 2016-12-23 | 2017-12-25 | Front-haul transport network, data transmission method, apparatus and computer storage medium |
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| CN201611209301.0A CN106888513B (en) | 2016-12-23 | 2016-12-23 | Forward pass network and data transmission method |
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| CN112055271A (en) * | 2019-06-06 | 2020-12-08 | 中国移动通信有限公司研究院 | Control method of wireless access network, network equipment and system |
| CN112118070B (en) * | 2019-06-20 | 2023-01-13 | 中国移动通信有限公司研究院 | Control method of forwarding network, network equipment and system |
| CN113852880A (en) * | 2020-06-28 | 2021-12-28 | 上海华为技术有限公司 | Networking system and related data transmission method |
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