CN106506411A - Uplink data transmission method and base station - Google Patents
Uplink data transmission method and base station Download PDFInfo
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- CN106506411A CN106506411A CN201510564880.XA CN201510564880A CN106506411A CN 106506411 A CN106506411 A CN 106506411A CN 201510564880 A CN201510564880 A CN 201510564880A CN 106506411 A CN106506411 A CN 106506411A
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Abstract
The invention provides a kind of uplink data transmission method and base station, methods described includes：Remote Radio Unit carries out symbol level process to the upstream data that multiple antennas are received, and forms bit data；The bit data is sent baseband processing unit by Remote Radio Unit；The baseband processing unit carries out bit-level process to the bit data.The present invention can greatly reduce the volume of transmitted data between Remote Radio Unit and baseband processing unit.
Description
Technical field
A kind of the present invention relates to baseband extension systems technology field, more particularly to transmitting uplink data
Method and base station.
Background technology
In following networking and wireless access network ture technology, at Remote Radio Unit and base band
Interface data transmission technology between reason unit is the important technical of system in future networking,
LTE (Long Term Evolution, long evolving system) and later technology introduce 20MHz
Above bandwidth and MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output)
Technology etc. so that the digitized radio frequency digital stream on single site is up to more than 50Gbps, takes light
Fine resource is huge, the interface bandwidth between Remote Radio Unit and baseband processing unit is proposed huge
Big challenge.
For example, in LTE, with 20MHz bandwidth, base station side antenna configurations are 8 antenna MIMO
When, Remote Radio Unit and baseband processing unit interface bandwidth are calculated as follows：
IR interface bandwidths=30.72MHz (sampling rate) × 16 (sampling precision) × 2 (I/Q two
Road) × 8 (antenna number)/80% (efficiency of transmission)=9830.4Mbps
Therefore, under the configuration of 8 antenna LTEs, general using the biography of the optical fiber with a width of 10GHz bandwidth
Defeated IR interface data.The interface data transmission of two-forty causes optical interface cost and Interface Matching
Chip cost, transmission cost etc. increase considerably, seriously reduce the cost performance of equipment.
In prior art, Remote Radio Unit (RRU) and baseband processing unit (BBU) are conventional
Under dividing mode, Remote Radio Unit be mainly responsible for the radio-frequency front-end of antenna receiving data process,
Analog-to-digital conversion process (A/D conversions) and IF process, baseband processing unit are responsible for processing in a large number
Baseband digital signal process part, mediate including single-carrier frequency division multiple access SC-FDMA solutions
The bit-level such as symbol level and solution constellation mapping, decoding such as reason, channel estimation, balanced merging
All Base-Band Processing functions.In a conventional manner, baseband processing unit and remote radio list are carried out
The function of unit is divided, and the data of IR interfaces transmission are under multiple reception antenna base band sampling rates
Time domain data, and the data volume is proportional with the antenna number of uplink receiving, causes interface to transmit
Data volume is huge, and as LTE is to high bandwidth, multiple antennas MIMO, many radio frequency processing lists
Under the growing trend of unit, multipoint cooperative application demand, the data volume that interface will be transmitted
To increase therewith, this development to LTE system will be a serious challenge.
Therefore, the problem for how reducing interface bandwidth has become the weight of future device realization and networking
One of point problem.
Content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is to provide a kind of upper line number that can reduce interface bandwidth
According to transmission method and base station.
(2) technical scheme
For solving above-mentioned technical problem, the invention provides a kind of uplink data transmission method, institute
The method of stating includes：
Remote Radio Unit carries out symbol level process to the upstream data that multiple antennas are received, and forms ratio
Special data；
The bit data is sent baseband processing unit by Remote Radio Unit；
The baseband processing unit carries out bit-level process to the bit data.
Preferably, the Remote Radio Unit carries out symbol level to the upstream data that multiple antennas are received
Process, forming bit data includes：
Single-carrier frequency division multiple access SC-FDMA solutions are carried out to the upstream data that the multiple antennas are received
Mediate reason；
Upstream data after the single-carrier frequency division multiple access SC-FDMA demodulation process is solved
Esource impact；
Channel estimation is carried out to the upstream data after the solution esource impact；
Balanced merging is carried out to the upstream data after the channel estimation, forms bit data.
Preferably, the baseband processing unit carries out bit-level process to the bit data includes：
Inverse discrete Fourier transform IDFT solution precodings are carried out to the bit data；
Xie Xing is carried out to the bit data that the inverse discrete Fourier transform IDFT is solved after precoding
Seat mapping.
Preferably, the bit data is sent base band by IR interfaces by the Remote Radio Unit
Processing unit.
For solving above-mentioned technical problem, present invention also offers a kind of base station, the base station includes
Remote Radio Unit and baseband processing unit；
Wherein, Remote Radio Unit, the upstream data for receiving to multiple antennas carry out symbol level
Process, form bit data, and the bit data is sent baseband processing unit；
Baseband processing unit, for carrying out bit-level process to the bit data.
Preferably, the Remote Radio Unit includes：
Demodulation process module, for carrying out single carrier frequency to the upstream data that the multiple antennas are received
Divide multiple access SC-FDMA demodulation process；
Solution resource mapping module, for mediating to the single-carrier frequency division multiple access SC-FDMA solutions
Upstream data after reason carries out solution esource impact；
Channel estimation module, estimates for carrying out channel to the upstream data after the solution esource impact
Meter；
Balanced merging module, for carrying out balanced merging to the upstream data after the channel estimation,
Form bit data.
The baseband processing unit includes：
Solution precoding module, for carrying out inverse discrete Fourier transform IDFT to the bit data
Solution precoding；
Solution constellation mapping block, after to inverse discrete Fourier transform IDFT solution precodings
Bit data carry out solution constellation mapping.
Preferably, the base station also includes that IR interface modules, the Remote Radio Unit pass through IR
The bit data is sent baseband processing unit by interface module.
(3) beneficial effect
A kind of uplink data transmission method that the present invention is provided, Remote Radio Unit are connect to multiple antennas
The upstream data of receipts carries out symbol level process, forms bit data；And the bit data is sent out
Send baseband processing unit；The baseband processing unit carries out bit-level process to the bit data,
So as to substantially reduce the volume of transmitted data between Remote Radio Unit and baseband processing unit.
Description of the drawings
Fig. 1 is that a kind of flow process of uplink data transmission method that embodiment of the present invention is provided is illustrated
Figure；
Fig. 2 is a kind of schematic diagram of base station that embodiment of the present invention is provided；
Fig. 3 is the schematic diagram of another kind of base station that embodiment of the present invention is provided.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is made further in detail
Description.Following examples are used for the present invention to be described, but are not limited to the scope of the present invention.
Fig. 1 shows a kind of schematic flow sheet of uplink data transmission method of present invention offer,
As shown in figure 1, the method for the present embodiment includes：
101st, Remote Radio Unit carries out symbol level process, shape to the upstream data that multiple antennas are received
Into bit data；
102nd, the bit data is sent baseband processing unit by Remote Radio Unit；
103rd, the baseband processing unit carries out bit-level process to the bit data.
Wherein, the said method in the present invention can be used for up CoMP transmission, specifically,
Baseband processing unit can in advance by the configuration needed for Physical Uplink Shared Channel PUSCH process
Information is sent to Remote Radio Unit, the upper line number that Remote Radio Unit is received first to multiple antennas
According to radio-frequency front-end process, analog-to-digital conversion process (A/D conversions) and IF process is carried out, then
Upstream data after to IF process is carried out at the symbol level of Physical Uplink Shared Channel PUSCH
Reason, including：Single-carrier frequency division multiple access SC-FDMA is carried out to the upstream data that multiple antennas are received
Demodulation process；Upstream data after single-carrier frequency division multiple access SC-FDMA demodulation process is carried out
Solution esource impact；Channel estimation is carried out to solving the upstream data after esource impact；To channel estimation
Upstream data afterwards carries out balanced merging, forms bit data, and the bit data is passed through IR
Interface sends baseband processing unit.
After baseband processing unit receives the bit data of Remote Radio Unit transmission, which is carried out
The bit-level of Physical Uplink Shared Channel PUSCH is processed, including：Bit data is carried out discrete
Inverse Fourier transform IDFT solves precoding, and inverse discrete Fourier transform IDFT is solved after precoding
Bit data carry out solution constellation mapping, and other process such as decoding.
In present embodiment, Remote Radio Unit is substantially carried out symbol level process, Base-Band Processing list
First mainly responsible bit-level is processed, and Remote Radio Unit sends Base-Band Processing by the transmission of IR interfaces
The data of unit are the bit datas unrelated with antenna number, and this is also Remote Radio Unit and base band
The foundation that processing unit function is divided, so that reach the purpose for reducing IR interface bandwidths.
Fig. 2 shows a kind of schematic diagram of base station of present invention offer, as shown in Fig. 2 described
Base station includes Remote Radio Unit (RRU) 21 and baseband processing unit (BBU) 23；
Wherein, Remote Radio Unit 21, the upstream data for receiving to multiple antennas carry out symbol
Level is processed, and forms bit data, and the bit data is sent by IR interface modules 22
Baseband processing unit 23；
Baseband processing unit 23, for carrying out bit-level process to the bit data.
Wherein, Remote Radio Unit 21 includes demodulation process module 211, solution resource mapping module
212nd, channel estimation module 213 and balanced merging module 214；Baseband processing unit 23 includes solving
Precoding module 231 conciliates constellation mapping block 232.
Specifically, the upstream data that the multiple antennas are received is carried out list by demodulation process module 211
Carrier wave frequency division multiple access SC-FDMA demodulation process, including removing Cyclic Prefix (CP), quick Fu
Family name converts (FFT)；Resource mapping module 212 is solved by the single-carrier frequency division multiple access
Upstream data after SC-FDMA demodulation process carries out solution esource impact；Channel estimation module 213
Upstream data after the solution esource impact is carried out channel estimation；Balanced merging module 214 will
Upstream data after the channel estimation carries out balanced merging, forms bit data, and this is compared
Special data send baseband processing unit 23 by IR interfaces.
After baseband processing unit 23 receives the bit data of the transmission of Remote Radio Unit 21, right
Which carries out bit-level process, including：Inverse discrete Fourier transform IDFT is carried out to the bit data
Solution precoding；The bit data that the inverse discrete Fourier transform IDFT is solved after precoding is carried out
Solution constellation mapping.
The up-link functional module of Remote Radio Unit 21 and baseband processing unit 23 is again
Divide, direct advantage is significantly to save the consumed bandwidth of 22 data transfer of IR interface modules, and
And transmitted data amount can accordingly change with the change of the type of service of transmission and portfolio,
Improve the effectiveness of interface data.So that the multi-antenna data of Remote Radio Unit 21 is transmitted not
It is limited again, big bandwidth radio-frequency extension unit and many remote radio lists is realized with less transfer resource
Unit is possibly realized to baseband processing unit transmission data, and then is LTE high bandwidths, multiple antennas
The application scenarios such as MIMO, multipoint cooperative are realized providing technical support.
Fig. 3 shows the schematic diagram of another kind of base station of present invention offer, as shown in figure 3, institute
Stating base station includes main plot RRU31, cooperation cell RRU32, main plot BBU33 and cooperation
Cell BBU34.
Wherein, main plot RRU31 includes antenna data receiver module 311, front end processing block
312nd, analog-to-digital conversion module 313, IF process module 314, demodulation process module 315, Xie Zi
Source mapping block 316, channel estimation module 317 and balanced merging module 318.
Cooperation cell RRU32 include antenna data receiver module 321, front end processing block 322,
Analog-to-digital conversion module 323, IF process module 324, demodulation process module 325, solution resource are reflected
Penetrate module 326, channel estimation module 327 and balanced merging module 328.
Main plot BBU33 includes solving precoding module 331, solution constellation mapping block 332, soft
Merging module 333, descrambling module 334, decoding module 335.
Cooperation cell BBU34 includes that solving precoding module 341 conciliates constellation mapping block 342.
Preferably, the base station also includes IR interface modules 351 and IR interface modules 352, institute
Stating main plot RRU31 will be little for described for bit data transmission master by IR interface modules 351
Area BBU33；The cooperation cell RRU32 passes through IR interface modules 352 by the bit number
According to the transmission cooperation cell BBU34.
The processing data of multiple antennas is divided in remote radio by the splitting scheme of present embodiment as far as possible
Unit (RRU), baseband processing unit (BBU) can transmit thing to Remote Radio Unit in advance
Reason Uplink Shared Channel PUSCH processes required configuration information；Remote Radio Unit carries out equilibrium
Merge and its all process before, balanced merging module incorporates the data of multiple antennas, so as to
Form bit data, bit number of the Remote Radio Unit after equilibrium is merged by IR interface modules
According to baseband processing unit is sent to, so as to substantially reduce volume of transmitted data.
Specifically, main plot RRU31 is carried out at front end to the upstream data that multiple antennas are received first
Reason, analog-to-digital conversion process and IF process, then to IF process after upstream data carry out
The symbol level of Physical Uplink Shared Channel PUSCH is processed, including：Up after to IF process
Data carry out single-carrier frequency division multiple access SC-FDMA demodulation process；To single-carrier frequency division multiple access
Upstream data after SC-FDMA demodulation process carries out solution esource impact；To solving after esource impact
Upstream data carries out channel estimation；Balanced merging is carried out to upstream data after channel estimation process,
Form bit data；The bit data is sent main plot BBU33 by IR interfaces.
After main plot BBU33 receives the bit data of main plot RRU31 transmissions, solution prelists
Code 331 pairs of bit datas of module carry out inverse discrete Fourier transform IDFT solution precodings；Xie Xing
Seat mapping block 332 is carried out to the bit data that inverse discrete Fourier transform IDFT is solved after precoding
Solution constellation mapping, then sends to soft merging module 333.
Similarly, the upstream data that multiple antennas are received by cooperation cell RRU32 carries out front end successively
Process, analog-to-digital conversion process, IF process, single-carrier frequency division multiple access SC-FDMA solutions are mediated
Reason, solution esource impact process, channel estimation, balanced merging, form bit data, and should
Bit data sends cooperation cell BBU34 by IR interfaces；Cooperation cell BBU34 is received
After the bit data that cooperation cell RRU32 sends, 341 pairs of bit datas of precoding module are solved
Carry out inverse discrete Fourier transform IDFT solution precodings；Solution constellation mapping block 342 is to discrete Fu
In bit data after leaf inverse transformation IDFT solution precodings carry out solution constellation mapping, and constellation will be solved
Bit data after mapping is sent to soft merging module 333.
The solution constellation mapping block 332 for receiving is conciliate constellation mapping mould by soft merging module 333
The bit data that block 342 sends carries out soft merging；After 334 pairs of soft mergings of descrambling module
Bit data is descrambled；Bit data after 335 pairs of descramblings of decoding module enters row decoding.
New remote radio is carried out by the functional module to Physical Uplink Shared Channel PUSCH
Unit and baseband processing unit processing region are divided, and can effectively reduce having for IR interface modules
Transmitted data amount is imitated, and the transmission of data volume changes as the change of portfolio is dynamic, effectively
Improve the utilization rate of data transfer.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, relevant
The those of ordinary skill of technical field, without departing from the spirit and scope of the present invention,
Can also make a variety of changes and modification, therefore the technical scheme of all equivalents falls within the present invention
Category, the present invention scope of patent protection should be defined by the claims.
Claims (8)
1. a kind of uplink data transmission method, it is characterised in that methods described includes：
Remote Radio Unit carries out symbol level process to the upstream data that multiple antennas are received, and forms ratio
Special data；
The bit data is sent baseband processing unit by Remote Radio Unit；
The baseband processing unit carries out bit-level process to the bit data.
2. method according to claim 1, it is characterised in that the Remote Radio Unit
Symbol level process is carried out to the upstream data that multiple antennas are received, forming bit data includes：
Single-carrier frequency division multiple access SC-FDMA demodulation is carried out to the upstream data that the multiple antennas are received
Process；
Solution money is carried out to the upstream data after the single-carrier frequency division multiple access SC-FDMA demodulation process
Source maps；
Channel estimation is carried out to the upstream data after the solution esource impact；
Balanced merging is carried out to the upstream data after the channel estimation, forms bit data.
3. method according to claim 1, it is characterised in that the baseband processing unit
Carrying out bit-level process to the bit data includes：
Inverse discrete Fourier transform IDFT solution precodings are carried out to the bit data；
Solution constellation is carried out to the bit data that the inverse discrete Fourier transform IDFT is solved after precoding
Mapping.
4. method according to claim 1, it is characterised in that the Remote Radio Unit
The bit data is sent by baseband processing unit by IR interfaces.
5. a kind of base station, including Remote Radio Unit and baseband processing unit, it is characterised in that：
Remote Radio Unit, the upstream data for receiving to multiple antennas carry out symbol level process,
Bit data is formed, and the bit data is sent baseband processing unit；
Baseband processing unit, for carrying out bit-level process to the bit data.
6. base station according to claim 5, it is characterised in that the Remote Radio Unit
Including：
Demodulation process module, for carrying out single carrier frequency to the upstream data that the multiple antennas are received
Divide multiple access SC-FDMA demodulation process；
Solution resource mapping module, for the single-carrier frequency division multiple access SC-FDMA demodulation process
Upstream data afterwards carries out solution esource impact；
Channel estimation module, estimates for carrying out channel to the upstream data after the solution esource impact
Meter；
Balanced merging module, for carrying out balanced merging to the upstream data after the channel estimation,
Form bit data.
7. base station according to claim 5, it is characterised in that the baseband processing unit
Including：
Solution precoding module, for carrying out inverse discrete Fourier transform IDFT to the bit data
Solution precoding；
Solution constellation mapping block, after to inverse discrete Fourier transform IDFT solution precodings
Bit data carry out solution constellation mapping.
8. base station according to claim 5, it is characterised in that the base station also includes IR
The bit data is sent base by IR interface modules by interface module, the Remote Radio Unit
Tape handling unit.
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| CN201510564880.XA CN106506411A (en) | 2015-09-07 | 2015-09-07 | Uplink data transmission method and base station |
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| CN112511233A (en) * | 2019-09-16 | 2021-03-16 | 中兴通讯股份有限公司 | Radio frequency remote device, active antenna and base station system |
| CN113078981A (en) * | 2020-01-06 | 2021-07-06 | 富华科精密工业（深圳）有限公司 | Communication system and method |
| CN115211081A (en) * | 2020-02-27 | 2022-10-18 | 哲库科技有限公司 | Digital interface for frequency domain data transfer between baseband module and radio frequency module |
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