CN103535094B - The transmission method of common public radio interface data and equipment - Google Patents
The transmission method of common public radio interface data and equipment Download PDFInfo
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- CN103535094B CN103535094B CN201180002308.4A CN201180002308A CN103535094B CN 103535094 B CN103535094 B CN 103535094B CN 201180002308 A CN201180002308 A CN 201180002308A CN 103535094 B CN103535094 B CN 103535094B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
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Abstract
The transmission method of a kind of common public radio interface data and relevant device.Method includes: obtaining and need to be sent to the data volume of the outgoing data of wireless device RE, described outgoing data is common public radio interface data；Judge whether the data volume of described outgoing data is more than the data carrying capabilities of the transmission link between data sending terminal and described RE, if not, then use unicast transmission mode that described outgoing data is formed Ether frame, the most then use multicast data transmission mode or broadcast transmission mode that described outgoing data is formed Ether frame；Described Ether frame is sent to described RE by ethernet switch.Additionally, also provide for a kind of relevant device realizing the method.
Description
Technical field
The present embodiments relate to the communications field, particularly relate to the transmission method of a kind of common public radio interface data with
And equipment.
Background technology
Common public radio interface (CPRI, The Common Public Radio Interface) alliance is a work
Industry cooperative association, is devoted to be engaged in wireless base station internal wireless equipment control centre (REC, Radio Equipment
And the formulation work of primary interface specification between wireless device (RE, Radio Equipment) Control).CPRI protocol definition
Interface relationship between REC and RE, its data structure is used directly for the data of repeater and carries out far-end transmission, become
A kind of far-drawing system of base station.
The CPRI protocol realization form of existing equipment is directly to be transmitted by CPRI interface, due to existing CPRI technology
Only support coaxial cable, and interface quantity is many, transmission range near, does not the most adapt to flexible and changeable network environment.
In prior art, propose following solution for these problems, particularly as follows:
Base station system includes base band processing device (being equivalent to REC) and multiple transmitting and receiving unit (is equivalent to
RE), REC is connected with multiple RE by CPRI interface respectively.It is a little right that REC is carried out with multiple RE by CPRI interface specification simultaneously
Point data is transmitted, and when REC Yu RE carries out data transmission, the data message corresponding to multiple RE can be bundled to a number by REC
According in bag, then by this packet flooding to each RE, when certain RE receives this packet, only extract the number of oneself correspondence
According to, abandon unwanted data.
Conventionally, as use point-to-point communication between REC and RE, the link cost of hardware is higher,
And cause the connected mode of networking to be fixed, change the configurations difficult of networking, very flexible in the future；And RE receive be REC send
The mass-sending data come, RE only extracts the data of oneself correspondence, abandons unwanted data, cause causing biography after receiving packet
Defeated inefficient.
Summary of the invention
Embodiments provide transmission method and the relevant device of a kind of common public radio interface data, for spirit
The data-transmission mode adjusted in network lived.
The transmission method of the common public radio interface data that the present invention provides, including: obtain and need to be sent to wireless setting
The data volume of the outgoing data of standby RE, described outgoing data is common public radio interface data；Judge described outgoing data
Whether data volume is more than the data carrying capabilities of the transmission link between data sending terminal and described RE, if it is not, then use clean culture
Described outgoing data is formed Ether frame by transmission mode, the most then use multicast data transmission mode or broadcast transmission mode by described
Outgoing data composition Ether frame；Described Ether frame is sent to described RE by ethernet switch.
Optionally, described acquisition needs to be sent to the data volume of the outgoing data of wireless device RE, including: obtain need into
RE quantity, the frame data speed of CPRI and the frame reserved bit of row data transmission；According to described RE quantity and described frame data speed
Rate calculates user face data amount and the chain of command data volume of described outgoing data respectively, calculates CPRI frame according to described frame reserved bit
Be converted to the amount of redundant data of Ether frame；By described user face data amount, described chain of command data volume and described amount of redundant data
It is added, obtains the data volume of described outgoing data.
Optionally, described outgoing data is formed Ether frame by described use unicast transmission mode, including: to described due-out
According to carrying out I/Q data and controlling the separation of data；Described IQ to 3 any one data after separating and control data difference
Composition Ether frame.
Optionally, described outgoing data is formed Ether frame, bag by described use multicast data transmission mode or broadcast transmission mode
Include: judge whether described RE belongs to plural LAN, the most then use multicast data transmission mode by described due-out
According to composition Ether frame, if it is not, then use broadcast transmission mode that described outgoing data is formed Ether frame.
Optionally, described outgoing data is formed Ether frame by described use multicast data transmission mode, including: will belong to same
The described outgoing data of LAN is divided into one group；Respectively the outgoing data of each group is formed the ether that each LAN is corresponding
Frame；And/or, described outgoing data is formed Ether frame by described use broadcast transmission mode, including: directly by described outgoing data
Composition Ether frame.
The wireless device controls center that the present invention provides, including: acquiring unit, need to be sent to wireless device for acquisition
The data volume of the outgoing data of RE, described outgoing data is common public radio interface data；Select unit, be used for judging described
Whether the data volume of outgoing data is more than the data carrying capabilities of the transmission link between data sending terminal and described RE, if it is not,
Then use unicast transmission mode that described outgoing data forms Ether frame, the most then use multicast data transmission mode or broadcast transmission
Described outgoing data is formed Ether frame by pattern；Transmission unit, for sending described ether by ethernet switch to described RE
Frame.
Optionally, described acquiring unit includes: data acquisition module, and being used for obtaining in described network needs to carry out data biography
Defeated RE quantity, the frame data speed of CPRI and frame reserved bit；Data computation module, for according to described RE quantity and described
Frame data speed calculates user face data amount and the chain of command data volume of described outgoing data respectively, according to described frame reserved bit meter
Calculate CPRI frame and be converted to the amount of redundant data of Ether frame, and by described user face data amount, described chain of command data volume and described
Amount of redundant data is added, and obtains the data volume of described outgoing data；Ability acquisition module, for obtaining the number of described transmission link
According to bearing capacity.
Optionally, described selection unit includes: the first judge module, for whether judging the data volume of described outgoing data
More than described data carrying capabilities, the most then trigger the first framing module, if it is not, then trigger the second judge module；First framing
Module, for the outgoing data in described network being carried out I/Q data and controlling the separation of data, the described IQ after separating
Data and control data separately constitute Ether frame；Second judge module, is used for judging whether described RE belongs to two or more
LAN, the most then trigger the second framing module, if it is not, then trigger the 3rd framing module；Second framing module, is used for
The described outgoing data belonging to same LAN is divided into one group, respectively the outgoing data of each group is formed each LAN
The Ether frame that network is corresponding；3rd framing module, for directly forming Ether frame by described outgoing data.
The base station that the present invention provides, including: REC and RE；
REC, needs to be sent to the data volume of the outgoing data of wireless device RE for obtaining, and described outgoing data is general
Common wireless interface data；Judge that whether the data volume of described outgoing data is more than the transmission between data sending terminal and described RE
The data carrying capabilities of link, if it is not, then use unicast transmission mode that described outgoing data is formed Ether frame, the most then makes
With multicast data transmission mode or broadcast transmission mode, described outgoing data is formed Ether frame；Sent out to described RE by ethernet switch
Send described Ether frame.
RE, for for carrying out data transmission with above-mentioned REC.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that and is sending data to wireless device
Before, the technical scheme that the embodiment of the present invention provides is held according to the data volume of the outgoing data in network and the data of this network
Loading capability is transmitted the selection of pattern, if the data volume of outgoing data is more than data carrying capabilities, then use multicast pattern or
Broadcast mode；If the data volume of outgoing data is less than or equal to data carrying capabilities, then uses unicast transmission mode, improve number
Efficiency according to transmission；The embodiment of the present invention adjusts the transmission mode of data flexibly according to practical situation so that the money in network
Source can be distributed rationally, improves the utilization rate of Internet resources.
Accompanying drawing explanation
Fig. 1 is a schematic flow sheet of the transmission method of embodiment of the present invention common public radio interface data；
Fig. 2 is the schematic network structure of embodiment of the present invention unicast transmission mode；
Fig. 3 is the schematic network structure of embodiment of the present invention multicast transmission mode；
Fig. 4 is the schematic network structure of embodiment of the present invention broadcast transmission methods；
Fig. 5 is another schematic flow sheet of the transmission method of embodiment of the present invention common public radio interface data；
Fig. 6 is the framing schematic diagram of embodiment of the present invention unicast transmission mode；
Fig. 7 is the framing schematic diagram of embodiment of the present invention multicast transmission mode；
Fig. 8 is another schematic flow sheet of the transmission method of embodiment of the present invention common public radio interface data；
Fig. 9 is a structural representation at embodiment of the present invention wireless device controls center；
Figure 10 is a structural representation of embodiment of the present invention base station.
Detailed description of the invention
Embodiments provide transmission method and the relevant device of a kind of common public radio interface data, for spirit
The data-transmission mode adjusted in network lived.
Referring to Fig. 1, an embodiment of the transmission method of common public radio interface data of the present invention includes:
101, acquisition needs to be sent to the data volume of the outgoing data of wireless device；
In this step, can be obtained by REC and need to be sent to the data volume of the outgoing data of RE, outgoing data can be logical
By common wireless interface (CPRI) data.Wherein, above-mentioned RE can be a RE, it is also possible to for multiple RE；Field at multiple RE
Jing Zhong, the REC in the embodiment of the present invention can send data to the RE in this REC span of control, it is also possible to simultaneously to another
RE in REC span of control sends data, as long as getting the network address of target RE.
The data volume of this outgoing data can be directly notified REC by the base station in network, it is also possible to by REC according to current
The design parameter (e.g., the data rate etc. of the number of RE, CPRI) of network scenarios is calculated.In the case of being calculated,
The data volume of above-mentioned outgoing data is specifically as follows the data volume sum needing the Ether frame being sent to each target RE to be comprised,
It should be noted that REC is the data volume that the data volume after being converted into Ether frame according to CPRI data counts stating outgoing data in.
102, judge that whether the data volume of above-mentioned outgoing data is more than the chain between data sending terminal and wireless device
The data carrying capabilities on road；
After the data volume getting this outgoing data, REC can compare data volume and the conduct of this this outgoing data
The data carrying capabilities of the transmission link between REC and RE of data sending terminal, it is judged that the data volume of this outgoing data is the biggest
In this data carrying capabilities, if it is not, then perform step 103, the most then perform step 104；
Wherein, the largest data transfer amount that this data carrying capabilities can be able to carry for transmission link, concrete, this is
Big volume of transmitted data can be determined by hardware device, and REC i.e. would know that after networking.It is of course also possible to by data carrying capabilities
It is defined as a ratio of the largest data transfer amount that can carry, such as 90%.
103, use unicast transmission mode that outgoing data is formed Ether frame；
When REC knows the data carrying capabilities that the data volume of outgoing data is less than or equal to transmission link, REC is with each
The base frame of RE is unit, uses unicast transmission mode that the outgoing data of corresponding RE is formed Ether frame, wherein, each base frame length
For Tc=1/3.84MHz=260.4ns, and each base frame specifically includes 16 bytes.
Refer to Fig. 2, this unicast transmission mode is the transmission mould carrying out data transmission one to one between two network nodes
Formula, now reception and the transmission of data is only carried out between these two nodes, and data are only carried out by the ethernet switch in network
Forward and do not replicate.In embodiments of the present invention, ethernet switch is when receiving with the ether of unicast transmission mode framing
After frame, existing unicast protocol is used to select transmission path according to the destination address of institute's labelling in this Ether frame, by this Ether frame
It is transferred to the RE specified.
When transfer resource abundant (i.e. the data volume of outgoing data is less than or equal to the data carrying capabilities of transmission link),
REC can be for each RE carrying out data transmission one by one, and so, REC can launch separate operation for single RE, REC with
The operation of opposite end can be responded timely between RE；And in the Ether frame received by RE, only include this RE required for connect
The data received, effectively reduce the process expense of RE.
104, use multicast data transmission mode or broadcast transmission mode that outgoing data is formed Ether frame；
When REC knows the data carrying capabilities that the data volume of outgoing data is more than transmission link, REC is uniformly by pending
Data corresponding for each RE in data are packed, and form Ether frame；Wherein it is possible to the data that all RE are corresponding are grouped
Packing (i.e. the framing mode of multicast data transmission mode), obtains several Ether frames and (obtains the number of Ether frame less than RE's herein
Number)；Data corresponding for all RE can also be carried out uniform packing (i.e. the framing mode of broadcast transmission mode), obtain one
Ether frame.
Refer to Fig. 3, this multicast data transmission mode is disposably to the pattern of multiple destination nodes transmission data.Use multicast
Transmission mode, both can realize once transmitting the data of multiple destination node, it is also possible to reach only special object to be transmitted data
Purpose, be relative to unicast transmission mode and the transmission mode of a kind of compromise of broadcast transmission mode.Further, multicast passes
The use of defeated pattern can be in conjunction with concrete network scenarios, e.g., whether has that several to have identical traffic special in this all of RE
The RE levied, the treatment conditions of current REC whether permission etc..
Refer to Fig. 4, this broadcast transmission mode is the transmission of a network node peripherad network node broadcast
Pattern, the signal that wherein any one network node sends the most unconditionally is replicated and turns by the ethernet switch in network
Sending out, all-network node can receive the Ether frame (no matter this network node the need of) comprising all information, due to
Path selection need not be carried out, so the network cost of broadcast transmission mode can be the cheapest.
105, Ether frame is sent by ethernet switch to wireless device.
After the assembling that outgoing data is completed Ether frame, REC data after ethernet switch sends composition Ether frame,
Make ethernet switch, according to the transmission address of these Ether frame data, these Ether frame data are separately sent to corresponding RE.And RE
After Ethernet netting twine receives the Ether frame data that too switch sends, CPRI frame can be recovered, thus obtain CPRI
Data.
Sending before data to RE, the technical scheme that the embodiment of the present invention provides according to the data volume of outgoing data and
The data carrying capabilities of this network is transmitted the selection of pattern, if the data volume of outgoing data is more than data carrying capabilities, then
Use multicast pattern or broadcast mode；If the data volume of outgoing data is less than or equal to data carrying capabilities, then clean culture is used to pass
Defeated pattern carries out man-to-man data transmission；The embodiment of the present invention adjusts the transmission mode of data flexibly according to practical situation,
Resource in network can be distributed rationally, improve the utilization rate of Internet resources.
Calculating to the data volume of outgoing data is described in detail below, refers to Fig. 5, the general public wireless of the present invention
Another embodiment of the transmission method of interface data includes:
501, the relevant parameter of current network scene is obtained；
REC obtains the relevant parameter of current network scene, and this parameter specifically may include that number N of RERE, the frame of CPRI
Speed x, frame reserved bit p.
Concrete, REC can determine speed and frame reserved bit p of current CPRI, this frame according to the CPRI equipment connected
Reserved bit p be Ether frame net load in for control management byte.
502, the data volume of outgoing data is calculated according to above-mentioned relevant parameter；
REC is according to number N of RERE, frame rate x of CPRI calculates user face data amount and the control of this outgoing data respectively
Face data volume, wherein, user face data amount needs to calculate NRETotal user face data amount of individual RE, and owing to chain of command data are
NREIndividual RE is shared, and therefore, chain of command data volume only need to calculate the data volume of single chain of command information.
REC calculates CPRI frame according to frame reserved bit and is converted to the amount of redundant data of Ether frame, and wherein, this amount of redundant data can
To include the byte end to end of Ether frame, the byte of frame reserved bit and frame period byte.
Above-mentioned user face data amount, chain of command data volume and amount of redundant data are added by REC, obtain the data of outgoing data
Amount.
Concrete, due to IQ number in base frame period, the byte end to end of Ether frame, frame period byte and the Ether frame of CPRI
Byte according to (I data and Q data) is all given data, therefore, and only need to be by RE quantity NRE, CPRI frame data speed x with
And frame reserved bit p substitutes into below equation one, the data volume of outgoing data can be tried to achieve.
Formula one:
In above-mentioned formula one, 1/3.84MHz is the base frame period of CPRI, and 26 is the byte end to end of Ether frame, 12 be with
The too frame period byte of frame, 8 are converted to the conversion proportion of bit number for byte number, and 15 is the byte of I/Q data in Ether frame.
503, the data volume of outgoing data and the size of data carrying capabilities are contrasted；
After above-mentioned 502 data volumes being calculated outgoing data, REC compares the data volume of this outgoing data and data are held
The size of loading capability y；
If Then perform
Step 204；
If Then perform
Step 505.
504, use unicast transmission mode that outgoing data is formed Ether frame；
When REC knows the data carrying capabilities that the data volume of outgoing data is less than or equal to this transmission link, REC is each
The base frame of RE is unit, uses unicast transmission mode that the outgoing data of this corresponding RE is formed Ether frame.Refer to Fig. 6, specifically
, REC the control data (Control data) in base frame and I/Q data (A*C Container) are all bundled to one with
Too in frame.
Refer to Fig. 2, this unicast transmission mode is the transmission mould carrying out data transmission one to one between two network nodes
Formula, now reception and the transmission of data is only carried out between these two nodes, and data are only carried out by the ethernet switch in network
Forward and do not replicate.In embodiments of the present invention, ethernet switch is when receiving with the ether of unicast transmission mode framing
After frame, existing unicast protocol is used to select transmission path according to the destination address of institute's labelling in this Ether frame, by this Ether frame
It is transferred to the RE specified.
When transfer resource abundant (i.e. the data volume of outgoing data is less than or equal to the data carrying capabilities of transmission link),
REC can be for each RE carrying out data transmission one by one, and so, REC can launch separate operation, and REC for single RE
And the operation of opposite end can be responded between RE timely, and in the Ether frame received by RE, only include required for this RE
The data received, effectively reduce the process expense of RE.
505, use multicast data transmission mode or broadcast transmission mode that outgoing data is formed Ether frame；
When REC knows the data carrying capabilities that the data volume of outgoing data is more than transmission link, REC is uniformly by pending
Data corresponding for each RE in data are packed, and form Ether frame；Wherein it is possible to the data that all RE are corresponding are grouped
Packing (i.e. the framing mode of multicast data transmission mode), obtains several Ether frames and (obtains the number of Ether frame less than RE's herein
Number)；Data corresponding for all RE can also be carried out uniform packing (i.e. the framing mode of broadcast transmission mode), obtain one
Ether frame.Referring to Fig. 7, concrete, REC is by the control data (Control data) in base frame and I/Q data (A*C
Container) it is bundled to respectively in different Ether frames.
Refer to Fig. 3, this multicast data transmission mode is disposably to the pattern of multiple destination nodes transmission data.Use multicast
Transmission mode, both can realize once transmitting the data of multiple destination node, it is also possible to reach only special object to be transmitted data
Purpose, be relative to unicast transmission mode and the transmission mode of a kind of compromise of broadcast transmission mode.Further, multicast passes
The use of defeated pattern can be in conjunction with concrete network scenarios, e.g., whether has that several to have identical traffic special in this all of RE
The RE levied, the treatment conditions of current REC whether permission etc..
Further, if using multicast data transmission mode, it may be determined that RE number NREIn M group (M is whole more than 0
Number), the number often organizing RE is i.When being grouped, may further require that each group is required for meeting below equation two, with
Guarantee that the data of each group transmit the data carrying capabilities not over transmission link；
Formula two:
This broadcast transmission mode is the biography of a network node peripherad network node broadcast in Ethernet
Defeated pattern, the signal that wherein any one network node sends all is carried out without bar by the ethernet switch (or router) in network
Part replicates and forwards, and all-network node can receive the Ether frame that comprises all information, and (no matter whether this network node
Need), owing to Path selection need not be carried out, so the network cost of broadcast transmission mode can be the cheapest.
506, Ether frame is sent by ethernet switch to wireless device.
After the assembling that outgoing data is completed Ether frame, REC data after ethernet switch sends composition Ether frame,
Make ethernet switch, according to the transmission address of these Ether frame data, these Ether frame data are separately sent to corresponding RE.And RE
After Ethernet netting twine receives the Ether frame data that too switch sends, CPRI frame can be recovered, thus obtain CPRI
Data.
If REC uses unicast transmission mode or multicast data transmission mode, then when framing, need outgoing data is carried out
Separate, specifically refer to Fig. 8, another embodiment bag of the transmission method of common public radio interface data of the present invention
Include:
801, the relevant parameter of current network scene is obtained；
REC obtains the relevant parameter of current network scene, and this parameter specifically includes: number N of RERE, the frame rate of CPRI
X, frame reserved bit p.
Concrete, REC can determine speed and frame reserved bit p of current CPRI, this frame according to the CPRI equipment connected
Reserved bit p be Ether frame net load in for control management byte.
802, the data volume of outgoing data is calculated according to above-mentioned relevant parameter；
REC is according to number N of RERE, frame rate x of CPRI and frame reserved bit p calculate the outgoing data of current network
Data volume, can be specially: above-mentioned parameter substitutes into formula one, try to achieve the data volume of outgoing data.
Formula one:
In above-mentioned formula one, 1/3.84MHz is the base frame period of CPRI, and 26 is the byte end to end of Ether frame, 12 be with
The too frame period byte of frame, 8 are converted to the conversion proportion of bit number for byte number, and 15 is the byte of I/Q data in Ether frame.
803, the data volume of outgoing data and the size of data carrying capabilities are contrasted；
After above-mentioned 802 data volumes being calculated outgoing data, REC compares the data volume of this outgoing data and data are held
The size of loading capability y；
If Then perform
Step 804；
If Then perform
Step 805.
804, use unicast transmission mode that outgoing data is formed Ether frame；
When the data volume of the outgoing data in REC knows network is less than or equal to the data carrying capabilities of this network, REC
In units of the base frame of each RE, to the I/Q data of each RE in this outgoing data and control data (CM, Control
Management data) split, then the data of each RE (include I/Q data and control data) are packaged as respectively with
Too frame.Owing to each Ether frame can add the fixed overhead (such as lead code) of some Ether frames, and ethernet switch is come
Saying have the base frame of several RE just to have several Ether frame, therefore the data volume of the outgoing data in network needs less than or is equal to
The data carrying capabilities of this network just can use unicast transmission mode.
805, judge whether wireless device belongs to plural LAN；
REC judges to need whether each target RE sending data belongs to as plural LAN, the most then
Perform step 806, if it is not, then perform step 807.
806, use multicast data transmission mode that outgoing data is formed Ether frame；
Above-mentioned outgoing data, according to the division of LAN, is separated by REC, will belong to treating of same LAN
Send out data be divided into one group, to belong to same LAN outgoing data all I/Q data and control data extract,
Form an Ether frame；Respectively the outgoing data of each group is formed the Ether frame that each LAN is corresponding.Such as, local network
Can be divided into A LAN and B LAN, then REC is by the I/Q data in all outgoing data belonging to A LAN and control
Data are extracted, and are packaged into A Ether frame, and A Ether frame is then broadcasted in A LAN by REC by ethernet switch；
In like manner, the I/Q data in all outgoing data belonging to B LAN and control data are extracted by REC, are packaged into B ether
Frame, is broadcasted B Ether frame by ethernet switch in B LAN.
Further, when using multicast data transmission mode, can be with RE number NREIn M group (M is the integer more than 0),
The number often organizing RE is i, when being grouped, may further require that each group is required for meeting below equation two, to guarantee
The data transmission of each group is not over the data carrying capabilities of transmission link；
Formula two:
807, use broadcast transmission mode that outgoing data is formed Ether frame；
Control data in outgoing data and control data are not separated by all of outgoing data of REC extracting directly,
Directly all outgoing data are formed Ether frame, broadcasted in whole network by ethernet switch.
808, Ether frame is sent by ethernet switch to wireless device.
After the assembling that outgoing data is completed Ether frame, REC data after ethernet switch sends composition Ether frame,
Make ethernet switch, according to the transmission address of these Ether frame data, these Ether frame data are separately sent to corresponding RE.And RE
After Ethernet netting twine receives the Ether frame data that too switch sends, CPRI frame can be recovered, thus obtain CPRI
Data.
In order to make it easy to understand, the general public wireless described in the above embodiments is connect with a concrete application scenarios below
The transmission method of mouth data is described in detail again, particularly as follows:
One REC carries out 10G ethernet communication by Ethernet switch with N number of RE, and CPRI speed is that CPRI V4.2 carries
5 kinds of speed: 491.52Mbps of confession, 983.04Mbps, 1966.08Mbps, 2457.6Mbps, 3932.16Mbps,
4915.2Mbps。
Need the aerial signal of varying number according to the embodiment of base station, wherein aerial signal is interpreted as by antenna
The signal launched or receive.Generally, UMTS base station has 6 antennas, and femto cell only has 1 antenna.Owing to being used
The quantity of antenna different, can the inapplicable transfer resource arranging for aerial signal and retaining in CPRI.For not using
Aerial signal, between base band processing device REC and transmitting and receiving unit RE1, RE2, RE3 transmit 0.By from CPRI number
Remove untapped resource according to, further reduce the bandwidth required for transmission CPRI data.
Use above-mentioned measure, the pin of 1228.8Mbit/s can be initially required by the Ethernet wire transmission of 1Gbit/s
Connection to CPRI data, is connected by the CPRI of the Ethernet wire transmission 2457.6Mbit/s of two 1Gbit/s, if by
The CPRI of the Ethernet wire transmission 614.4Mbit/s of dry 100Mbit/s connects.If CPRI data are passed by Ethernet packet
Defeated, then in order to be connected with transmitting and receiving unit RE1, RE2, RE3 by base band processing device REC, existing ether can be used
Net wire.
Existing Ethernet is used to connect as base band processing device REC and RE1, the example of connection between RE2, RE3.Root
It is applicable to indoor application according to the configuration of Figure 10, is i.e. applicable to transmitting and receiving unit RE1, RE2, RE3 and is positioned at the situation in building.
Base band processing device REC is connected with Ethernet switch ETHERNET SWITH by GBIC wire GbE, and sends
Two 100Mbit (megabit) Ethernet wire 100MbE and Ethernet switch is passed through respectively with receiving unit R E1, RE2, RE3
ETHERNET SWITH connects.Certainly can also by transmitting and receiving unit RE1, RE2, RE3 respectively by varying number with
Too net wire is connected with Ethernet switch ETHERNET SWITH.Indoor base station is generally only for answering a wireless school district, wherein
Wireless area should be understood to that specific region combines specific frequency band.Therefore in indoor base station, it is not necessary to from what to send and
Receive unit R E1, RE2, RE3 transmit big data transfer rate, thus two 100Mbit (megabit) Ethernet wire 100MBE just be enough to
Power to transmitting and receiving unit RE1, RE2 or a RE3 respectively.Fax transmission method is used in 100Mbit Ethernet wire,
The sphere of action of this connection is hundreds of rice to the maximum.A lot of buildings all have the cable laying using 100Mbit Ethernet wire, because of
This can transmit CPRI data with the wire existed.
After completing the layout of physical equipment, REC can be transmitted pattern according to the various parameters of current network
Selecting, particularly as follows: REC knows that the data end to end of Ether frame are 26 bytes, adding redundancy (frame reserved bit) in Ether frame payload is
36 bytes, the interframe of Ether frame is divided into 12 bytes, by above processing mode, can obtain reaching on 10Gbps Ethernet
The frame rate of the CPRI of index request is q, it is achieved unicast transmission needs to meet following relation:
Wherein, NREIt it is the RE number in a base frame；Represent under frame rate q of CPRI, each RE
The average amount comprised；Length for control word；8 (36+26+12) are amount of redundancy, frame head tail and frame period
The data volume comprised； For under frame rate q of CPRI,
The data volume of the outgoing data that one Ether frame of one RE comprises.
When RE number is less than or equal to 2, it is considered to maximum rate 4.9152Gbps situation
Be can be calculated by above formula, not over switch load under maximum rate, RE can be worked as to use unicast transmission mode
When number is more than or equal to 3, now needing to consider the rate requirement of CPRI V4.2, the speed that CPRI V4.2 provides has 5 kinds,
Frame rate q of CPRI be respectively 491.52Mbps, 983.04Mbps, 1966.08Mbps, 2457.6Mbps, 3932.16Mbps,
4915.2Mbps.The data volume of the outgoing data that frame rate q of its different CPRI is corresponding is as shown in 0,0,0.
RE number is equal to 3
RE number is equal to 4
RE number is equal to 5
Three forms from above can obtain, when the number of RE is more than or equal to 5, no matter the frame rate of CPRI is many
Few, mode of unicast all can not be used to be transmitted；When the number of RE is equal to 3 or 4, can select according to the frame rate difference of CPRI
Select the transmission of mode of unicast.
As a example by the number of RE is equal to 3, when the frame rate that number is 3 and CPRI of RE be 3932.16Mbps or
During 4915.2Mbps, form can obtain the data volume of outgoing data more than 10G, thus its framing mode be thought of as broadcast or
The mode of multicast, according to broadcast mode, it is achieved form is simple, and the complexity that REC end processes is little, but can increase offered load
Amount；According to multicast, as RE1 is set to one group, RE2 and RE3 is set to another group, and such offered load is little, but can increase
REC end realizes complexity, it is possible to carry out flexible framing according to network load condition.
The various parameters that above-mentioned instance analysis is based in existing standard, it is to be understood that in development from now on
In, the various parameters in standard are it may happen that change, and the data carrying capabilities of the physical equipment of reality also can change, because of
This, above-mentioned it is concluded that all set up on the basis of existing parameter, should not be construed as the concrete restriction to the present invention.
The most only with some examples, the application scenarios in the embodiment of the present invention is illustrated, it is to be understood that
In actual application, it is also possible to have more application scenarios, be not construed as limiting the most herein.
Below the embodiment of the REC of the present invention of the transmission method for performing above-mentioned common public radio interface data is entered
Row explanation, its logical structure refer to Fig. 9, and in the embodiment of the present invention, an embodiment of REC includes:
Acquiring unit 901, needs to be sent to the data volume of the outgoing data of RE for obtaining, and described outgoing data is general
Common wireless interface data；
Select unit 902, for judge the data volume of above-mentioned outgoing data whether more than data sending terminal and described RE it
Between the data carrying capabilities of transmission link, if it is not, then use unicast transmission mode the outgoing data in this network is formed with
Too frame, the most then use multicast data transmission mode or broadcast transmission mode that the outgoing data in this network is formed Ether frame；
Transmission unit 903, for sending above-mentioned Ether frame by ethernet switch to RE.
Acquiring unit 901 in the embodiment of the present invention may include that
Data acquisition module 9011, for obtaining RE quantity, the frame data of CPRI needing in network to carry out data transmission
Speed and frame reserved bit；
Data computation module 9012, for calculating the user face number of outgoing data respectively according to RE quantity and frame data speed
According to amount and chain of command data volume, calculate CPRI frame according to frame reserved bit and be converted to the amount of redundant data of Ether frame, and by user face
Data volume, chain of command data volume and amount of redundant data are added, and obtain the data volume of outgoing data；
Ability acquisition module 9013, for obtaining the data carrying capabilities of above-mentioned transmission link.
Selection unit 902 in the embodiment of the present invention may include that
First judge module 9021, for judging that whether the data volume of above-mentioned outgoing data is more than above-mentioned Deta bearer energy
Power, the most then trigger the first framing module 9022, if it is not, then trigger the second judge module 9023；
First framing module 9022, for the outgoing data in network being carried out I/Q data and controlling the separation of data,
I/Q data and control data after separating separately constitute Ether frame；
Second judge module 9023, is used for judging whether above-mentioned RE belongs to for plural LAN, the most then
Trigger the second framing module 9024, if it is not, then trigger the 3rd framing module 9025；
Second framing module 9024, for the outgoing data belonging to same LAN is divided into one group, respectively will be each
The outgoing data of group forms the Ether frame that each LAN is corresponding.
3rd framing module 9025, for directly forming Ether frame by above-mentioned outgoing data.
The interaction that in embodiment of the present invention REC, unit is concrete is as follows:
When REC needs the multiple RE in network to send business datum, the acquiring unit 901 of REC obtains to be needed to send
To the data volume of the outgoing data of RE, outgoing data can be common public radio interface (CPRI) data.Wherein, above-mentioned RE can
Think a RE, it is also possible to for multiple RE；In the scene of multiple RE, the REC in the embodiment of the present invention can control to this REC
In the range of RE send data, it is also possible to simultaneously the RE in another REC span of control sends data, if the target of getting
The network address of RE.
The data volume of this outgoing data can be directly notified REC by the base station in network, it is also possible to by REC according to current
The design parameter (e.g., the data rate etc. of the number of RE, CPRI) of network scenarios is calculated.In the case of being calculated,
The data volume of above-mentioned outgoing data is specifically as follows the data volume sum needing the Ether frame being sent to each target RE to be comprised,
It should be noted that REC is the data volume that the data volume after being converted into Ether frame according to CPRI data counts stating outgoing data in.
Optionally, if calculated the data volume of the outgoing data in network according to the design parameter of current network scene by REC,
Then particularly as follows: obtained the data carrying capabilities of transmission link by ability acquisition module 9013；Obtained by data acquisition module 9011
The relevant parameter of current network scene, this parameter specifically includes: number N of RERE, frame rate x of CPRI, frame reserved bit p, this frame
Reserved bit p be Ether frame net load in for control management byte.Then by data computation module 9012 according to RE
Number NRE, frame rate x of CPRI calculates user face data amount and the chain of command data volume of this outgoing data, wherein, user face respectively
Data volume needs to calculate NRETotal user face data amount of individual RE, and owing to chain of command data are NREIndividual RE is shared, therefore,
Chain of command data volume only need to calculate the data volume of single chain of command information；Then, calculate CPRI frame according to frame reserved bit to be converted to
The amount of redundant data of Ether frame, wherein, this amount of redundant data can include the byte end to end of Ether frame, the byte of frame reserved bit and
Frame period byte；Finally, above-mentioned user face data amount, chain of command data volume and amount of redundant data are added, obtain outgoing data
Data volume.Concrete, above-mentioned parameter can be substituted into formula one, try to achieve the data volume of outgoing data.
Formula one:
In above-mentioned formula one, 1/3.84MHz is the base frame period of CPRI, and 26 is the byte end to end of Ether frame, 12 be with
The too frame period byte of frame, 8 are converted to the conversion proportion of bit number for byte number, and 15 is the byte of I/Q data in Ether frame.
After the data volume of the outgoing data in obtaining network and the data carrying capabilities of this network, select unit
902 select suitable data-transmission mode according to the data volume of this outgoing data and the size of data carrying capabilities, the most permissible
For: judged whether the data volume of above-mentioned outgoing data is more than above-mentioned data carrying capabilities by the first judge module 9021, the most then
Trigger the first framing module 9022, if it is not, then trigger the second judge module 9023.
Determining according to practical situation, the first framing module 9022 is in units of the base frame of each RE, to this outgoing data
In the I/Q data of each RE and control data and split, then by the data of each RE (include I/Q data and control data) point
It is not packaged as Ether frame.Owing to each Ether frame can add the fixed overhead (such as lead code) of some Ether frames, and for
Too for switch, having the base frame of several RE just to have several Ether frame, therefore the data volume of the outgoing data in network needs
Unicast transmission mode just can be used less than or equal to the data carrying capabilities of this network.Refer to Fig. 2, this unicast transmission mode
It is the transmission mode carrying out the transmission of data one to one between two network nodes, the now reception of data and only sending at these two
Carrying out between node, data are only forwarded and do not replicate by the ethernet switch in network.In embodiments of the present invention,
Ethernet switch, after receiving the Ether frame with unicast transmission mode framing, uses existing unicast protocol according to this Ether frame
The destination address of middle institute labelling selects transmission path, and this Ether frame is transferred to the RE specified.
Determining according to practical situation, the second judge module 9023 judges whether above-mentioned RE belongs to plural local
Network, the most then trigger the second framing module 9024, if it is not, then trigger the 3rd framing module 9025.
Determining according to practical situation, the second framing module 9024 is according to the division of LAN, to above-mentioned outgoing data
Separate, the outgoing data belonging to same LAN is divided into one group, to the outgoing data belonging to same LAN
All I/Q data and control data extract, form an Ether frame；Respectively the outgoing data of each group is formed each
The Ether frame that LAN is corresponding.Such as, local network can be divided into A LAN and B LAN, then REC will belong to A local
I/Q data and control data in all outgoing data of net are extracted, and are packaged into A Ether frame, and REC then passes through ether
A Ether frame is broadcasted in A LAN by switch；In like manner, REC is by the IQ in all outgoing data belonging to B LAN
Data and control data are extracted, and are packaged into B Ether frame, are carried out by B Ether frame by ethernet switch in B LAN
Broadcast.
Further, when using multicast data transmission mode, it may be determined that RE number NREIn M group (M is whole more than 0
Number), the number often organizing RE is i.When being grouped, may further require that each group is required for meeting below equation two, with
Guarantee that the data of each group transmit the data carrying capabilities not over transmission link；
Formula two:
Determining according to practical situation, the 3rd framing module 9025 all of outgoing data of extracting directly, not to due-out
Separate according to middle control data and control data, directly all outgoing data are formed Ether frame, pass through ethernet switch
Broadcast in whole network.Refer to Fig. 4, this broadcast transmission mode is that a peripherad network node of network node is wide
Broadcasting the transmission mode of message, the signal that wherein any one network node sends all is carried out without bar by the ethernet switch in network
Part replicates and forwards, and all-network node can receive the Ether frame that comprises all information, and (no matter whether this network node
Need), owing to Path selection need not be carried out, so the network cost of broadcast transmission mode can be the cheapest.
After the assembling that outgoing data completes Ether frame, transmission unit 903 sends composition Ether frame to ethernet switch
After data so that these Ether frame data are separately sent to accordingly by ethernet switch according to the transmission address of these Ether frame data
RE.
Below to being used for performing the embodiment of the base station of the present invention of the transmission method of above-mentioned common public radio interface data
Illustrating, its logical structure refer to Figure 10, and in the embodiment of the present invention, an embodiment of base station includes:
REC described by previous embodiment, specifically includes: acquiring unit, needs to be sent to the due-out of RE for obtaining
According to data volume, described outgoing data is common public radio interface data；Select unit, for judging above-mentioned outgoing data
Whether data volume is more than the data carrying capabilities of the transmission link between data sending terminal and described RE, if it is not, then use clean culture
Outgoing data in this network is formed Ether frame by transmission mode, the most then use multicast data transmission mode or broadcast transmission mode
Outgoing data in this network is formed Ether frame；Transmission unit, for sending to RE by ethernet switch and CPRI
State Ether frame.
Optionally, acquiring unit may include that data acquisition module, needs to carry out data transmission for obtaining in network
RE quantity, the frame data speed of CPRI and frame reserved bit；Data computation module, for dividing according to RE quantity and frame data speed
Do not calculate user face data amount and the chain of command data volume of outgoing data, calculate CPRI frame according to frame reserved bit and be converted to Ether frame
Amount of redundant data, and by user face data amount, chain of command data volume and amount of redundant data be added, obtain the data of outgoing data
Amount；Ability acquisition module, for obtaining the data carrying capabilities of above-mentioned transmission link.
Optionally, unit is selected to may include that the first judge module, for whether judging the data volume of above-mentioned outgoing data
More than above-mentioned data carrying capabilities, the most then trigger the first framing module, if it is not, then trigger the second judge module；First framing
Module, for the outgoing data in network being carried out I/Q data and controlling the separation of data, I/Q data after separating and
Control data and separately constitute Ether frame；Second judge module, is used for judging whether above-mentioned RE belongs to for plural local
Network, the most then trigger the second framing module, if it is not, then trigger the 3rd framing module；Second framing module, for belonging to
The outgoing data of same LAN is divided into one group, respectively the outgoing data of each group is formed each LAN corresponding with
Too frame.3rd framing module, for directly forming Ether frame by above-mentioned outgoing data.
RE, for carrying out data transmission with above-mentioned REC；Wherein, this RE can include multiple.
Concrete, after RE receives the Ether frame data that too switch sends on Ethernet netting twine, can recover
CPRI frame, thus obtain CPRI data.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, and the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method are permissible
Realize by another way.Such as, device embodiment described above is only schematically, such as, and described unit
Dividing, be only a kind of logic function and divide, actual can have other dividing mode, the most multiple unit or assembly when realizing
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communication connection, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server, or the network equipment etc.) performs the complete of method described in each embodiment of the present invention
Portion or part steps.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (9)
1. the transmission method of a common public radio interface data, it is characterised in that including:
Obtaining and need to be sent to the data volume of the outgoing data of wireless device RE, described outgoing data is common public radio interface
Data；
Judge whether the data volume of described outgoing data holds more than the data of the transmission link between data sending terminal and described RE
Loading capability, if it is not, then use unicast transmission mode that described outgoing data forms Ether frame, the most then uses multicast transmission mould
Described outgoing data is formed Ether frame by formula or broadcast transmission mode；
Described Ether frame is sent to described RE by ethernet switch；
Wherein, described outgoing data is formed Ether frame by described use multicast data transmission mode or broadcast transmission mode, including:
Judge whether described RE belongs to plural LAN, the most then use multicast data transmission mode by described pending
Data composition Ether frame, if it is not, then use broadcast transmission mode that described outgoing data is formed Ether frame.
Method the most according to claim 1, it is characterised in that described acquisition needs to be sent to the due-out of wireless device RE
According to data volume, including:
Obtain RE quantity, the frame data speed of CPRI and the frame reserved bit needing to carry out data transmission；
User face data amount and the chain of command of described outgoing data is calculated respectively according to described RE quantity and described frame data speed
Data volume, calculates CPRI frame according to described frame reserved bit and is converted to the amount of redundant data of Ether frame；
Described user face data amount, described chain of command data volume and described amount of redundant data are added, obtain described outgoing data
Data volume.
Method the most according to claim 1, it is characterised in that described acquisition needs to be sent to the due-out of wireless device RE
According to data volume, including:
Obtain RE quantity, the frame data speed of CPRI and the frame reserved bit needing to carry out data transmission；
By described RE quantity NRE, described CPRI frame data speed x and frame reserved bit p substitute into formula one, calculate described due-out
According to data volume, described formula one is:
4. according to the method described in any one of claims 1 to 3, it is characterised in that described use unicast transmission mode is by described
Outgoing data composition Ether frame, including:
Described outgoing data is carried out I/Q data and controls the separation of data；
Described I/Q data and control data after separating separately constitute Ether frame.
Method the most according to claim 1, it is characterised in that
Described outgoing data is formed Ether frame by described use multicast data transmission mode, including:
The described outgoing data belonging to same LAN is divided into one group；
Respectively the outgoing data of each group is formed the Ether frame that each LAN is corresponding；
And/or,
Described outgoing data is formed Ether frame by described use broadcast transmission mode, including:
Directly described outgoing data is formed Ether frame.
6. a wireless device controls center REC, it is characterised in that including:
Acquiring unit, needs to be sent to the data volume of the outgoing data of wireless device RE for obtaining, and described outgoing data is logical
Use common wireless interface data；
Select unit, for judging that whether the data volume of described outgoing data is more than the transmission between data sending terminal and described RE
The data carrying capabilities of link, if it is not, then use unicast transmission mode that described outgoing data is formed Ether frame, the most then makes
With multicast data transmission mode or broadcast transmission mode, described outgoing data is formed Ether frame；
Transmission unit, for sending described Ether frame by ethernet switch to described RE；
Wherein, described selection unit includes:
Second judge module, is used for judging whether described RE belongs to plural LAN, the most then triggers second group
Frame module, if it is not, then trigger the 3rd framing module；
Second framing module, for being divided into one group by the described outgoing data belonging to same LAN, respectively by each group
Outgoing data forms the Ether frame that each LAN is corresponding；
3rd framing module, for directly forming Ether frame by described outgoing data.
REC the most according to claim 6, it is characterised in that described acquiring unit includes:
Data acquisition module, for obtain network needs carry out data transmission RE quantity, the frame data speed of CPRI and
Frame reserved bit；
Data computation module, for calculating the user of described outgoing data respectively according to described RE quantity and described frame data speed
Face data volume and chain of command data volume, calculate CPRI frame according to described frame reserved bit and be converted to the amount of redundant data of Ether frame, and
Described user face data amount, described chain of command data volume and described amount of redundant data are added, obtain the number of described outgoing data
According to amount；
Ability acquisition module, for obtaining the data carrying capabilities of described transmission link.
8. according to the REC described in claim 6 or 7, it is characterised in that described selection unit also includes:
First judge module, for judging whether the data volume of described outgoing data is more than described data carrying capabilities, the most then
Trigger the first framing module, if it is not, then trigger the second judge module；
First framing module, for carrying out I/Q data and control the separation of data, after separating to the outgoing data in network
Described I/Q data and control data separately constitute Ether frame.
9. a base station, it is characterised in that including: the REC as described in any one of claim 6 to 8, and enter with described REC
The RE of row data transmission.
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| CN101005450A (en) * | 2006-12-15 | 2007-07-25 | 上海华为技术有限公司 | General public radio interface data transmission method and its device and system |
| CN101326790A (en) * | 2005-12-13 | 2008-12-17 | 艾利森电话股份有限公司 | Technique for distributing content via different bearer types |
| CN101369972A (en) * | 2008-10-17 | 2009-02-18 | 华为技术有限公司 | Service data transmission method, system and equipment |
| CN101754481A (en) * | 2008-12-10 | 2010-06-23 | 中兴通讯股份有限公司 | Method and system for controlling running mode switching of multimode wireless device |
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| CN101326790A (en) * | 2005-12-13 | 2008-12-17 | 艾利森电话股份有限公司 | Technique for distributing content via different bearer types |
| CN101005450A (en) * | 2006-12-15 | 2007-07-25 | 上海华为技术有限公司 | General public radio interface data transmission method and its device and system |
| CN101369972A (en) * | 2008-10-17 | 2009-02-18 | 华为技术有限公司 | Service data transmission method, system and equipment |
| CN101754481A (en) * | 2008-12-10 | 2010-06-23 | 中兴通讯股份有限公司 | Method and system for controlling running mode switching of multimode wireless device |
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