CN110035540A - A kind of cable modem and data transmission system - Google Patents
A kind of cable modem and data transmission system Download PDFInfo
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- CN110035540A CN110035540A CN201910229180.3A CN201910229180A CN110035540A CN 110035540 A CN110035540 A CN 110035540A CN 201910229180 A CN201910229180 A CN 201910229180A CN 110035540 A CN110035540 A CN 110035540A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
- H04L12/4645—Details on frame tagging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
The invention discloses a kind of cable modem (CM) and data transmission system, the CM is provided with uplink logical channel and classifier；The uplink logical channel is the data feedback channel that transmission authorization is needed not move through before sending data；The CM, for receiving the upstream data of mobile terminal UE transmission；When determining that the upstream data meets preset condition, it is replied without sending authorization requests to coaxial cable medium converter CMC without waiting CMC, the upstream data is directly sent to CMC by the uplink logical channel, via CMC by the transmitting uplink data to 5G back-end network.
Description
Technical field
The present invention relates to the communication technology more particularly to a kind of cable modem and data transmission systems.
Background technique
5th third-generation mobile communication technology (5G, the 5thGeneration) epoch have arrived, and mobile communication is main from 1G to 4G
If solving interpersonal communication, and 5G then lays particular emphasis on and solves people and object, the communication between object and object.5G application will be covered
Three categories scene, that is: enhancing mobile broadband (EMBB), super reliable low latency communication (URLLC) and large machines type communication
(mMTC)。
Third generation partner program (3GPP, 3rd Generation Partnership Project) defines for 5G
Air interface is known as new radio (NR, New Radio), and specification is divided into two frequency ranges: FR1 (Frequency Range) frequency
Range is 600MHz to 6GHz and FR2 is 24-86GHz of millimere-wave band.FR1 frequency range maximum available bandwidth is 100MHz, FR2 frequency range
Maximum available bandwidth is 400MHz, and for the 100MHz bandwidth of the carrier wave polymerization compared to 4GLTE, the bandwidth of 5GFR2 has very big
It is promoted.
Since millimetre wavelength is shorter, it is usually used in line-of-sight transmission mode, penetration capacity is very poor, has high fading characteristic.
From the point of view of 5G, the covered range of signal of macro base station institute just becomes extremely limited.From the point of view of the construction demand of 5G, it can take " macro
The mode of base station+micro-base station " networking covering.Micro-base station is small in size, and deployment flexibly, can flexibly be deployed in crowd's building dense
Place.
The bearer network construction of the large scale deployment of micro-base station, reply will be one of operator's problem encountered.It is micro-
The signal return (Backhaul) of base station is the intermediate line link between core network or backbone network and network edge.
Backhaul return network must have big broadband, and rapid deployment quickly activates the service, the abilities such as convenient O&M and low cost.
Currently the Bidirectional HFC Network comparatively perfect in broadcasting and TV field and the wide network coverage, can be greatly decreased the capital expenditure of operator
Pressure.Since what is taken is " optical fiber+coaxial cable " framework, and two-way optical node constantly " sinking " is disposed, Bidirectional HFC Network
" natural " has highly reliable, low time delay characteristic to meet the related needs of 5G.
Fig. 1 is the return pass schematic diagram using hfc plant as 5G micro-base station, includes three subsystems, UE& in figure
Small Cell Sub-System,Docsis System,5G Core Network.Wherein UE (User Equipment), i.e.,
The mobile terminal of user；Small Cell, i.e. micro-base station；CM (Cable Modem), cable modem.CMC(Coax
Media Converter) coaxial cable medium converter；Clould RAN and Clould EPC constitute 5G back-end network.
The transmitting uplink data of 5G and hfc plant requires the process by requesting-authorizing.Under different application scene,
It is also each different that the upstream request of 5G network authorizes delay requirement.For example, under eMBB scene, 5GNR user plane time delay (unidirectional)
For 4ms；It has arrived under URLLC scene, 5G NR user plane time delay (unidirectional) is only 0.5ms；And control plane time delay will then be grown and be
10ms.The end-to-end typical delay time of DOCSIS3.0 is 10-15ms or so.Mobile network and DOCSIS network due to 5G
Two independent systems, their operation be it is serial, delay is the summation of two systems delay, and superposition end terminal delay time will have
It can exceed that 25ms.Such superposition high latency will have an impact the real-time of 5G network, will directly affect 5G in intelligence
The application of industry, pilotless automobile, VR and Internet of Things etc.；Such as pilotless automobile encounter barrier cannot be timely
Evade, encounter traffic congestion cannot reduce in time speed, encounter traffic lights cannot start and stop etc. in time, there are audiovideos in the field VR not
It is synchronous, virtual reality game Caton etc..
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of cable modem and data transmission
System.
The technical scheme of the present invention is realized as follows:
The embodiment of the invention provides a kind of cable modem CM, the CM is provided with uplink logical channel and classification
Device；The uplink logical channel is the data feedback channel that transmission authorization is needed not move through before sending data；
The CM, for receiving the upstream data of mobile terminal UE transmission；Determine that the upstream data meets preset condition
When, without sending authorization requests without waiting CMC to reply to coaxial cable medium converter CMC, pass through the uplink logic
The upstream data is directly sent to CMC by channel, via CMC by the transmitting uplink data to 5G back-end network.
Further, the upstream data meets preset condition, comprising: the upstream data carries web tab；Institute
Stating web tab, there are corresponding relationships with the classifier；
The corresponding time slot of the uplink logical channel is by before use, without initiating authorization requests to CMC by CM；The uplink
Logical channel is used for transmission the upstream data for carrying its corresponding web tab；
The classifier, when for determining that the upstream data carries web tab, according to the mark of upstream data carrying
Label, imported into corresponding uplink logical channel for upstream data.
Further, the CM further include: VLAN interchanger；
The VLAN interchanger, for adding institute to the upstream data according to the ethernet lan mouth for receiving upstream data
State web tab.
Further, the CM further include: processor；
The processor is dynamically determined the actually required of the uplink logical channel for upstream data amount based on the received
Time slot.
Further, the processor determines slot efficiency specifically for upstream data based on the received；
When determining that the slot efficiency is greater than preset slot efficiency threshold value, when to CMC transmission to obtain second
The application of gap is requested；The corresponding slot efficiency of second time slot is the slot efficiency threshold value；
When determining that the slot efficiency is less than slot efficiency threshold value, partial time slot is discharged；After discharging partial time slot
The corresponding slot efficiency of third time slot be the slot efficiency threshold value.
Further, the CM, specifically for the current time slot size of determination, number of timeslots and the upstream data；
Slot efficiency is determined according to the current time slot size, number of timeslots, the upstream data.
Further, the CM is specifically used for obtaining configuration file from tftp server, be created according to the configuration file
The uplink logical channel and classifier and the time slot for applying for uplink logical channel；
The CM is also used to read the minislot parameter value of preservation when being switched on operation；According to the configuration file and described
Minislot parameter value application uplink logical channel and its time slot.
Further, the upstream data meets preset condition, comprising: LAN mouthfuls of reception of the upstream data are corresponding with
Classifier；The classifier is the CMIM classifier that data identification is carried out according to cable modem interface mask CMIM；
The CMIM classifier, for determining LAN mouth for receiving the upstream data and described LAN mouthfuls of determination is corresponding with point
When class device, determine the corresponding uplink logical channel of the CMIM classifier, and by the upstream data import it is determining it is described on
Row logical channel.
Further, the CM is also used to determine the size of the upstream data, when the size for determining the upstream data
When can transmit the certain threshold value of size of data more than current time slots, the upstream data is transmitted by current time slots and caches remaining uplink
After data, requested according to the size of the upstream data to the application that the CMC is sent to obtain third time slot；It determines and obtains
After the third time slot, by the remaining upstream data of third slot transmission.
The embodiment of the invention also provides a kind of data transmission systems, which is characterized in that the system comprises: it is sequentially connected
5G back-end network, metropolitan area network switch, CMC, CM, micro-base station described in any of the above one；
The micro-base station sends CM for the UE upstream data sent for carrying out data transmission with UE；
The CM, for receiving upstream data via micro-base station transmission, that mobile terminal UE is sent；Determine the uplink
When data carry web tab, without sending authorization requests without waiting CMC to reply to CMC, pass through the uplink logic
The upstream data is directly sent to CMC by channel；
The CMC is used for the transmitting uplink data to metropolitan area network switch；
The metropolitan area network switch is used for the transmitting uplink data to 5G back-end network.
CM and system provided by the embodiment of the present invention, CM are provided with uplink logical channel and classifier；The uplink is patrolled
Collecting channel is the data feedback channel that transmission authorization is needed not move through before sending data；The CM, for receiving mobile terminal UE transmission
Upstream data；When determining that the upstream data meets preset condition, asked without sending authorization to coaxial cable medium converter CMC
It asks without waiting CMC to reply, the upstream data is directly sent to by CMC by the uplink logical channel, it will via CMC
The transmitting uplink data is to 5G back-end network.In the scheme of the embodiment of the present invention, the CM is not necessarily to before being configured with transmission data
By the uplink logical channel of transmission authorization, so that without applying for time slot, direct basis when CM sends upstream data to the CMC
Current time slots carry out data transmission, thus preferably shorten time delay, improve data transfer efficiency.
Detailed description of the invention
Fig. 1 is the return pass schematic diagram using hfc plant as 5G micro-base station；
Fig. 2 is a kind of schematic diagram of cable modem provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of data transmission system provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram of deterministic approach provided in an embodiment of the present invention；
Fig. 5 is the flow diagram of another deterministic approach provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of caching method provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of data transmission system provided in an embodiment of the present invention.
Specific embodiment
In various embodiments of the present invention, CM is provided with uplink logical channel and classifier；The uplink logical channel
For the data feedback channel for needing not move through transmission authorization before transmission data；The CM, for receiving the upper line number of mobile terminal UE transmission
According to；When determining that the upstream data meets preset condition, without to coaxial cable medium converter CMC send authorization requests also without
Need to wait for CMC reply, the upstream data is directly sent to by CMC by the uplink logical channel, via CMC will be described on
Row data are transmitted to 5G back-end network.
Below with reference to embodiment, the present invention is further described in more detail.
Fig. 2 is a kind of structural schematic diagram of cable modem provided in an embodiment of the present invention；As shown in Fig. 2, described
Cable modem (CM), the CM are provided with uplink logical channel and classifier；The uplink logical channel is to send number
According to the data feedback channel for preceding needing not move through transmission authorization；
The CM, for receiving the upstream data of mobile terminal UE transmission；Determine that the upstream data meets preset condition
When, without sending authorization requests without waiting CMC to reply to coaxial cable medium converter (CMC), patrolled by the uplink
The upstream data is directly sent to CMC by volume channel, via CMC by the transmitting uplink data to 5G back-end network.
Specifically, the upstream data meets preset condition, comprising: the upstream data carries web tab；It is described
There are corresponding relationships with the classifier for web tab；
The corresponding time slot (upstream time piece) of the uplink logical channel to CMC by CM by before use, without being initiated to authorize
Request；The uplink logical channel, is used for transmission the upstream data for carrying its corresponding web tab；
The classifier, when for determining that the upstream data carries web tab, according to the mark of upstream data carrying
Label, imported into corresponding uplink logical channel for upstream data.
Here, the time slot of uplink logical channel to CMC application and has CMC distribution from CM in advance, without applying again.
Specifically, CM sends the request that time slot is distributed for uplink logical channel to the CMC, when CMC is that uplink logical channel is distributed
Gap, so that the uplink logical channel of the CM can directly transmit upstream data according to the time slot of distribution；Realize that the CM is not necessarily to
Authorization requests are sent to CMC to reply without waiting CMC, it can be by the uplink logical channel directly by the upstream data
It is sent to CMC.
Specifically, the CM further include: VLAN interchanger；
The VLAN interchanger, for being added to the upstream data according to Ethernet (LAN) mouth for receiving upstream data
The web tab.
CM has pre-saved an Ethernet oral thermometer, wherein having received upstream data can be passed by uplink logical channel
Defeated LAN mouth, so that VLAN interchanger can determine whether to add web tab according to the LAN mouth for receiving upstream data.
Here, for example, VLAN interchanger receives upstream data, determines that the LAN mouth of the received upstream data is LAN
Mouth 1, then LAN mouth 1 is that it adds web tab (VLAN ID) based on the received, it is assumed that is VLAN 10；Here classifier is
Classifier based on VLAN, the classifier determine that upstream data carries VLAN10, determine corresponding uplink logical channel, it is assumed that
For uplink logical channel 1, then upstream data is imported into uplink logical channel 1 and transmitted.
It should be noted that a uplink logical channel can correspond to multiple classifiers, a classifier can only correspond to one
A uplink logical channel, these corresponding relationships preset and are stored in CM, can be read directly.
Specifically, the CM further include: processor；
The processor is dynamically determined the actually required of the uplink logical channel for upstream data amount based on the received
Time slot.
Specifically, the processor determines slot efficiency specifically for upstream data based on the received；
When determining that the slot efficiency is greater than preset slot efficiency threshold value, when to CMC transmission to obtain second
The application of gap is requested；The corresponding slot efficiency of second time slot is the slot efficiency threshold value；
When determining that the slot efficiency is less than slot efficiency threshold value, partial time slot is discharged；After discharging partial time slot
The corresponding slot efficiency of third time slot be the slot efficiency threshold value.
Here, the slot efficiency threshold value is preset and is saved by developer.
The CMC receives the application request or the request of the application to obtain third time slot to obtain the second time slot
Afterwards, time slot allocation is re-started according to the time slot applied in application request and informs CM in the completed.
Specifically, the CM, specifically for the current time slot size of determination, number of timeslots and the upstream data；Root
Slot efficiency is determined according to the current time slot size, number of timeslots, the upstream data.
Specifically, the CM, is specifically used for obtaining configuration file from tftp server, creates institute according to the configuration file
It states uplink logical channel and classifier and applies for the time slot of uplink logical channel；
The CM is also used to read the minislot parameter value of preservation when being switched on operation；According to the configuration file and described
Minislot parameter value application uplink logical channel and its time slot.
Specifically, the upstream data meets preset condition, comprising: LAN mouthfuls of reception of the upstream data are corresponding with point
Class device；The classifier is the CMIM classifier that data identification is carried out according to cable modem interface mask (CMIM)；
The CMIM classifier, for determining LAN mouth for receiving the upstream data and described LAN mouthfuls of determination is corresponding with point
When class device, determine the corresponding uplink logical channel of the CMIM classifier, and by the upstream data import it is determining it is described on
Row logical channel.
Specifically, the CM is also used to determine the size of the upstream data, when the size for determining the upstream data is super
When size of data certain threshold value can be transmitted by crossing current time slots, the upstream data is transmitted by current time slots and caches line number in residue
According to rear, according to the size of the upstream data to CMC transmission to obtain third time slot application request；It determines and obtains institute
After stating third time slot, by the remaining upstream data of third slot transmission.
It should be noted that above-described micro-base station is that 5G applies required base station.The CM is also provided with general
Logical data feedback channel first sends authorization requests to CMC, by sending upstream data after authorization.
Specifically, the CM can be set before one or more send data and need not move through the uplink that transmission authorizes
Logical channel, multiple uplink logical channels, need to be previously provided with the correspondence of LAN mouthfuls each, classifier, uplink logical channel if it exists
Relationship, with according to receive upstream data LAN mouth by transmitting uplink data into the uplink logical channel.
The embodiment of the invention also provides a kind of data transmission system, the system comprises: sequentially connected 5G back-end network
Network, metropolitan area network switch, CMC, CM, micro-base station described in figure 2 above；
The micro-base station sends CM for the UE upstream data sent for carrying out data transmission with UE；
The CM, for receiving upstream data via micro-base station transmission, that mobile terminal UE is sent；Determine the uplink
When data carry web tab, without sending authorization requests without waiting CMC to reply to CMC, pass through the uplink logic
The upstream data is directly sent to CMC by channel；
The CMC is used for the transmitting uplink data to metropolitan area network switch；
The metropolitan area network switch is used for the transmitting uplink data to 5G back-end network.
Fig. 3 is a kind of combination virtual LAN (VLAN, Virtual Local Area provided in an embodiment of the present invention
Network schematic network structure)；As shown in figure 3,5G network include: 5G back-end network, micro-base station (Small Cell),
Mobile terminal (UE, User Equipment)；Docsis network includes: coaxial cable medium converter (CMC, Coax Media
Converter), cable modem (CM, Cable Modem).The 5G network and the Docsis network pass through band
The metropolitan area network switch of VLAN configuration feature connects.Wherein, the metropolitan area network switch and the coaxial cable medium converter
It is connected using optical fiber or gigabit Ethernet, the coaxial cable medium converter and the cable modem use coaxial electrical
Cable connection.The Docsis network provides data transmission channel for the micro-base station.
Pass through the configuration file of CM between the CMC and CM is that coax network configures at least one up direction in advance
Logical channel (including uplink logical channel described in Fig. 1, can also include common data feedback channel) and current divider, example
: the coax network configured with common data feedback channel 1, common data feedback channel 2 ... the uplink as described in Fig. 1 is patrolled
Collect channel 10, current divider.Each channel can be independently operated, and can be set with by the configuration file of CM different attributes, such as set
Surely there is different priority etc.；Since 5G network has more harsh delay requirement, configurable 5G data walk high priority
Logical channel.The classifier can be bound with the uplink logical channel 10, to have the upstream data of web tab
It is transmitted by uplink logical channel 10.
In the present embodiment, the CM may include having VLAN interchanger, the VLAN interchanger, for according to reception uplink
The ethernet lan mouth of data adds the web tab to the upstream data.
The label is denoted as VLAN ID；The ID can indicate with number, value range 1-4094, such as: it is described
ID can be number 10, i.e., the described VLAN ID is 10.
Specifically, the configuration file of the CM can be preset by developer and be stored in tftp server, by
CM is downloaded from the tftp server of local side on startup, and the CM configures the working condition of CM according to the configuration file.
The configuration file of the CM includes at least the following contents:
At least one uplink logical channel；The uplink logical channel is to be allocated for the uplink logic that 5G is transmitted to lead to
Road, and this channel is supported to transmit without permission；
At least one VLAN classifier (Classifier), also referred to as current divider；The uplink of web tab will be had
Data are sent to corresponding uplink logical channel；
Different VLAN ID is specified for each LAN mouthfuls；To which the VLAN interchanger configures text according to the CM is set
The part VLAN ID that the upstream data insertion definition for entering each Ethernet interface is required.
For example, the corresponding above-mentioned VLAN 10 of LAN mouth 1, then VLAN interchanger is to equal by the received upstream data of LAN mouth 1
Add label VLAN 10.Here, the VLAN interchanger has complete 802.1Q functionality of vlan.In order to allow VLAN interchanger
Processing has the package of particular vlan label, and CM can be according to the configuration file obtained from tftp server to VLAN interchanger
It is programmed setting, so that the VLAN interchanger of CM has the ability of processing particular vlan package, adds web tab (VLAN
ID)。
The CM is awarded before completion registration is online according to transmission is needed not move through before the configuration file of CM creation transmission data
The uplink logical channel of power.It is standardized according to Docsis, the registration of CM is online to be roughly divided into following several stages, locking downlink, lock
Determine uplink, obtain IP address from local side Dynamic Host Configuration Protocol server, the configuration file for obtaining CM from local side tftp server, matching according to CM
Operating status, the completion registration for setting file configuration CM are online.Common uplink logical channel, which carries out transmission, to undergo request to authorize
Process, first have to before transmitting the data head-end CMC request time slot, only CMC to corresponding CM distribution time slot after
Can be carried out the transmission of data, and uplink logical channel described in Fig. 1 do not need request and receive to authorize using sending to CMC
Process, when have data reach CM after can transmit immediately.
The up direction of data transmission, the configuration file setting of CM are established VLAN 10 to the LAN mouth of VLAN interchanger and are marked
Label.Micro-base station, which is connected on LAN mouthfuls, LAN mouthfuls, carries out uplink to upstream data, and VLAN interchanger will be inserted into VLAN to it
10 labels.
For CM by the relevant classifier of the settable VLAN of configuration file, CM will be according to package characteristic matching when package is dispatched
Classifier then channel match logic.After reaching CM processor plus the package after VLAN10 via the VLAN interchanger of CM, CM
The package with VLAN 10 is sent into the corresponding uplink logical channel of VLAN classifier according to VLAN classifier mark, it is assumed that be
Uplink logical channel 10, since uplink logical channel 10 directly can transmit data so reducing without the process that request is authorized
Uplink time delay.
After CMC receives the upstream data of CM, the package transmission with vlan data is given to metropolitan area network switch, Metropolitan Area Network (MAN)
Interchanger has sent the data to 5G back-end services network according to VLAN ID.The metropolitan area network switch is also used to remove VLAN
ID will give 5G network without the transmitting uplink data of VLAN ID.
Be also provided in the embodiment of the present invention CM realize creation have activity detection function can unwarranted logic it is logical
The related algorithm in road.According to Docsis protocol specification, the dispatching algorithm of transmitting uplink data, uplink will transmit data before first
It needs to apply time slot (bandwidth), just can be carried out the transmission of data after the time slot for obtaining head end CMC distribution.This will increase data
The time delay of transmission adversely affects the deployment of 5G micro-base station.After CM is first powered on, matched from local side tftp server
After setting file, the uplink logical channel 10 of transmission authorization is needed not move through according to configuration file creation, and apply for initial slot, initially
Time slot size is arranged according to deployment empirical value, and the initial slot that can be timely updated by way of configuration file or other management CM
Parameter, such as pass through MIB, TR069 etc..CM to CMC application or is discharged according to the utilization rate of actual flow in the process of running
Partial time slot.
Fig. 4 is a kind of flow diagram of deterministic approach provided in an embodiment of the present invention；As shown in figure 4, CM is for the first time
Operation booting, obtains the configuration file of CM from the local side tftp server of hfc plant, is needed not move through according to configuration file creation
The uplink logical channel 10 of authorization is transmitted, and applies for initial slot, after UE there are data to need to pass to 5G by Docsis network
Hold network when, UE send upstream data by micro-base station reach CM after, the VLAN interchanger of CM based on the received LAN mouthfuls be its
Add web tab, it is assumed that be VLAN10, the classifier of CM determines the corresponding uplink of web tab according to preset classifying rules
Logical channel, it is assumed that after VLAN10 corresponds to uplink logical channel 10, send uplink for the upstream data containing VLAN10 label
Logical channel 10 is then transferred to 5G back-end network by uplink logical channel 10 directly by transmitting uplink data to CMC.
The CM, the actual uplink data sended over according to UE calculate slot efficiency in real time, and adjust time slot.Specifically
For, consider for redundancy, the slot efficiency threshold value of developer's setting, such as 80% is pre-saved in CM, when the time slot of CM
When utilization rate is greater than 80%, CM is in real time to CMC application more multi-slot, when the slot efficiency of CM is less than 80%, discharges part
Extra time slot, it is ensured that slot efficiency remains near 80%.And minislot parameter size is stored in the non-easy of CM in real time
In the property lost memory, such as in the FLASH of CM, to re-create logical channel after restarting as subsequent CM and apply for that time slot is joined
Several important evidences.
Wherein, slot efficiency=(the packet size * package quantity for reaching CM)/(time slot size * number of timeslots), it is described
The packet size * package quantity for reaching CM is actual upstream data.
Fig. 5 is the flow diagram of another deterministic approach provided in an embodiment of the present invention；As shown in figure 5, CM is opened
The minislot parameter value saved before last time shutdown is read in machine operation, obtains configuration file and according to the minislot parameter size Shen read
Please uplink logical channel 10, the Docsis network that base station data uses CMC and CM to constitute is as data transfer path, and CM is by uplink
Data are transferred to CMC by uplink logical channel 10, are then transferred to back-end network.CM is actively adjusted according to slot efficiency threshold value
Whole time slot size, and update and save minislot parameter into the FLASH of CM.
In the present embodiment, the CM is also used to determine the size of the upstream data, when determining the big of the upstream data
It is small when being more than that current time slots can transmit the certain threshold value of size of data, the upstream data is transmitted by current time slots and is cached in residue
After row data, requested according to the size of the upstream data to the application that the CMC is sent to obtain third time slot；Determination obtains
After obtaining the third time slot, by the remaining upstream data of third slot transmission.
Specifically, cause backhaul time delay to increase to solve the surge of 5G transmitted data amount, present embodiments provide a kind of slow
Method is deposited, is illustrated in fig. 6 shown below, after CM booting operation, spatial cache is opened up in the memory of CM and is used to deal with data volume mutation feelings
Condition.When upstream data at a time increase sharply cause can unwarranted uplink logical channel time slot application algorithm feedback lag,
The data for being no more than available time slot are continued to transmit, other processing is done to overage.Surpass when spatial cache will save enough
The data for crossing available time slot, when inadequate buffer space will abandon, transmit again.When uplink logical channel time slot is increased sufficiently to pass
Data cached taking-up feeding uplink logical channel 10 when obtaining the third time slot, is transferred to CMC by defeated above data.
The present embodiment, which is not limited to be classified with vlan technology, to be imported into uplink logical channel 10 for 5G data and transmits, separately
Docsis CMIM (Cable Modem Interface Mask, cable modem interface mask) technology can be used to divide
5G base station data is imported into uplink logical channel 10 and transmitted and other sorting techniques by class matching.The i.e. described CM is needed in CM
Configuration file in define CMIM classifier, the CMIM classifier determines LAN mouth for receiving the upstream data, described in determination
It is logical according to the determining corresponding uplink logic of the LAN mouthfuls of determination upstream datas when LAN mouthfuls of corresponding uplink logical channels
Road.It is specific as shown in Figure 7.Configuration VLAN interchanger is not needed in this network topology, is uplink without VLAN interchanger
Data add VLAN ID.
At this point, the configuration file of the CM is set, include following setting:
The uplink logical channel that at least one CMIM is used；The logic that this uplink logical channel is allocated for 5G transmission is logical
Road, and the support of this uplink logical channel can be transmitted without permission；
At least one CMIM classifier (Classifier), so that the processor of CM, which will correspond to LAN mouthfuls, (is assumed to be LAN mouthfuls
1) uplink package is sent to above-mentioned corresponding uplink logical channel.
Likewise, CM has activity detection function before completion registration is online, according to the setting creation of configuration file
Can unwarranted uplink logical channel 10, and create CMIM classifier for LAN mouth 1 and uplink logical channel (such as uplink logic
Channel 10) binding, so that the data that the base station 5G is transferred to CM LAN mouth 1 are assigned in uplink logical channel 10 by CM and transmit, after
And it is transferred to 5G back-end services network.Because use with activity detection function can unwarranted uplink logic it is logical
Road achievees the purpose that reduce uplink time delay so omitting request authorizes process.
The difference of VLAN classifier and CMIM classifier is whether upstream data needs to carry web tab (VLAN
ID), this programme can be achieved.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention, should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of cable modem CM, which is characterized in that the CM is provided with uplink logical channel and classifier；On described
Row logical channel is the data feedback channel that transmission authorization is needed not move through before sending data；
The CM, for receiving the upstream data of mobile terminal UE transmission；When determining that the upstream data meets preset condition, nothing
Authorization requests need to be sent to coaxial cable medium converter CMC to reply without waiting CMC, it is straight by the uplink logical channel
It connects and the upstream data is sent to CMC, via CMC by the transmitting uplink data to 5G back-end network.
2. cable modem according to claim 1, which is characterized in that the upstream data meets preset condition,
It include: that the upstream data carries web tab；There are corresponding relationships with the classifier for the web tab；
The corresponding time slot of the uplink logical channel is by before use, without initiating authorization requests without waiting CMC to CMC by CM
It replys；The uplink logical channel, is used for transmission the upstream data for carrying its corresponding web tab；
The classifier, will according to the label of upstream data carrying when for determining that the upstream data carries web tab
Upstream data imported into corresponding uplink logical channel.
3. cable modem according to claim 2, which is characterized in that the CM further include: VLAN interchanger；
The VLAN interchanger, for adding the net to the upstream data according to the ethernet lan mouth for receiving upstream data
Network label.
4. cable modem according to claim 1, which is characterized in that the CM further include: processor；
The processor, for upstream data amount based on the received be dynamically determined the uplink logical channel it is actually required when
Gap.
5. cable modem according to claim 4, which is characterized in that the processor connects specifically for basis
The upstream data of receipts determines slot efficiency；
When determining that the slot efficiency is greater than preset slot efficiency threshold value, to CMC transmission to obtain the second time slot
Application request；The corresponding slot efficiency of second time slot is the slot efficiency threshold value；
When determining that the slot efficiency is less than slot efficiency threshold value, partial time slot is discharged；The after discharging partial time slot
The corresponding slot efficiency of three time slots is the slot efficiency threshold value.
6. cable modem according to claim 5, which is characterized in that the CM, specifically for determining currently
Time slot size, number of timeslots and the upstream data；According to the current time slot size, number of timeslots, the upper line number
According to determining slot efficiency.
7. cable modem according to claim 1, which is characterized in that the CM is specifically used for servicing from TFTP
Device obtains configuration file, creates the uplink logical channel and classifier according to the configuration file and applies for uplink logical channel
Time slot；
The CM is also used to read the minislot parameter value of preservation when being switched on operation；According to the configuration file and the time slot
Parameter value application uplink logical channel and its time slot.
8. cable modem according to claim 1, which is characterized in that the upstream data meets preset condition,
It include: that LAN mouthfuls of reception of the upstream data are corresponding with classifier；The classifier is to be covered according to cable modem interface
Code CMIM carries out the CMIM classifier of data identification；
The CMIM classifier is corresponding with classifier for determining to receive the LAN mouth of the upstream data and determine described LAN mouthfuls
When, determine the corresponding uplink logical channel of the CMIM classifier, and the upstream data is imported into the determining uplink and is patrolled
Collect channel.
9. cable modem according to claim 1, which is characterized in that the CM is also used to determine the uplink
The size of data, when the size for determining the upstream data is more than that current time slots can transmit the certain threshold value of size of data, by working as
Upstream data described in preceding slot transmission and after caching remaining upstream data, sends out according to the size of the upstream data to the CMC
Send the application request to obtain third time slot；It determines after obtaining the third time slot, it is remaining by the third slot transmission
Upstream data.
10. a kind of data transmission system, which is characterized in that the system comprises: sequentially connected 5G back-end network, Metropolitan Area Network (MAN) are handed over
It changes planes, CMC, the above CM described in any one of claim 1-9, micro-base station；
The micro-base station sends CM for the UE upstream data sent for carrying out data transmission with UE；
The CM, for receiving upstream data via micro-base station transmission, that mobile terminal UE is sent；Determine the upstream data
When carrying web tab, without sending authorization requests without waiting CMC to reply to CMC, pass through the uplink logical channel
The upstream data is directly sent to CMC；
The CMC is used for the transmitting uplink data to metropolitan area network switch；
The metropolitan area network switch is used for the transmitting uplink data to 5G back-end network.
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| CN201910229180.3A CN110035540B (en) | 2019-03-25 | 2019-03-25 | Cable modem and data transmission system |
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| CN201910229180.3A CN110035540B (en) | 2019-03-25 | 2019-03-25 | Cable modem and data transmission system |
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