CN106656336A - Active-standby signal processing method of LTE base station baseband processing board - Google Patents
Active-standby signal processing method of LTE base station baseband processing board Download PDFInfo
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- CN106656336A CN106656336A CN201611267771.2A CN201611267771A CN106656336A CN 106656336 A CN106656336 A CN 106656336A CN 201611267771 A CN201611267771 A CN 201611267771A CN 106656336 A CN106656336 A CN 106656336A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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Abstract
The invention provides an active-standby signal processing method of an LTE base station baseband processing board. There is a group of active-standby state signals between active and standby BPUs, and the signals comprise a board card in-place signal, an active-standby state signal and a heartbeat signal, when the standby BPU detects that the active BPU is not in place or is switched to the standby BPU or the heartbeat is overtime, the standby BPU immediately sets itself as the active BPU and sets the opposite terminal BPU as the standby BPU at the same time so as to accomplish the active-standby switch of the BPUs, and active-standby state synchronization and DSP beat synchronization are accomplished at the same time. By adoption of the active-standby signal processing method provided by the invention, the synchronization of upper layer configuration parameters during the switch of the active and standby BPUs is not only solved, the synchronization of massive user data, control data, physical layer data and link layer data is also solved, during the switch of the active and standby BPUs, the original business is not interrupted, instant switch is realized, no user perception is realized as well.
Description
Technical field
The present invention relates to LTE-R wireless mobile communication base stations field, the active and standby letter of specifically a kind of LTE base station LTE Baseband Processing Unit
Number processing method.
Background technology
As Chinese Railway Mobile communication bandwidth demand rapidly increases, original GSM-R systems no longer adapt to new market
Demand, and with the gradually extinction of GSM industrial chains, in the urgent need to upgrading to original GSM-R communication systems.Ginseng
LTE-R Technical Standard Systems are being formulated according to GSM-R technical specifications Chinese Railway, using newest LTE technologies as the next generation
Railway Mobile Radio system.
LTE-R carries driving business, operation maintenance business, public safety communication business and the passenger information system industry of railway
Business.Driving business includes train scheduling communication, engineering dispatching communication, vehicle scheduling communication, power supply dispatching communication, comprehensive maintenance
Dispatching communication and emergency communication etc., these business propose high requirement to the stability of Railroad Communication System, reliability.For
The reliability of communication system is improved, whole communication system master-slave redundancy design is must take into during networking.Adopt two sets of communication systems
System, it is a set of primary, it is a set of standby, back-up system is rapidly switched to when active system failure, so ensure that communication industry is done honest work
Often work.
LTE wireless telecommunication systems are by terminal, base station and core net（EPC）Composition.Base station is by baseband processing unit（BBU）With
Remote Radio Unit（RRU）Constitute.BBU is usually multi-groove rack-mount unit, interpolation central control board（CCU）, Base-Band Processing
Plate（BPU）, power board etc., in machine room.BBU board levels it is active and standby because be limited by rack construction, hardware plan, power consumption,
Weight, cost, operability etc., are difficult to realize, or the master-slave redundancy that can only realize part board.BPU is most important in BBU
Board, using high-performance multi-core DSP chip, complete physical layer, MAC layer and three layer protocol functions, panel goes out CPRI optical interfaces
With RRU communications.Because the data processing amount of BPU is huge, general BPU master-slave redundancies are all will be primary by the network interface of backboard
The user of BPU and chain of command basic configuration are synchronized on standby BPU, the physics of substantial amounts of user and control data and magnanimity
Layer, link layer data due to expense is huge cannot be synchronous, service disconnection when so causing active-standby switch, terminal to initiate again with
Machine accesses application, through wireless heterogeneous networks（RRC）Foundation, RAB（E-RAB）The flow processs such as foundation are
Original business can again be continued.Once so BPU active-standby switch, it is time-consuming very long to re-establish business, for some times
Sensitive business possibly cannot receive.
The content of the invention
The present invention is in order to solve problem of the prior art, there is provided a kind of active and standby signal transacting of LTE base station LTE Baseband Processing Unit
Method, based on the High Speed Synchronous Bus of dsp chip, when active and standby BPU switchings are not only solved plus timing synchronization process
Upper-layer configured parameter synchronization, original business when active and standby BPU switches that realizes is not interrupted, instantaneous switching, user's unaware.
The BPU active-standby switch equipment that the present invention is used is made up of two parts：
（1）Light path switching part：Light path switching part realize BPU and RRU interfaces CPRI fiber optic protections switching and
Light point, can physically make one piece of light protection board and be inserted in BBU cabinets.Light protection board uses FPGA, does not use CPU, no
Installation operation system, software and hardware is as far as possible simple, it is ensured that the reliability of software and hardware.RRU is sent to the CPRI light of BPU
Signal Jing Light splitter toy, 1：1 gives active and standby two pieces of BPU, is connected in the reception of BPU optical modules, makes active and standby two pieces of BPU
Receive same RRU signals.By judging active and standby two pieces of BPU states, control alternative photoswitch makes R to light protection board
The CPRI optical signal switchings that RU is received are on primary BPU.
（2）BBU cabinets part：Active and standby BPU is inserted in BBU cabinets in board form, case back plate design 4
Bar bus is switched fast to support that BPU is active and standby.Including：1st, BPU activestandby states bus：Opposite end BPU is in place for detection
And activestandby state；2nd, DSP beats synchronous bus：The inside beat of dsp chip on synchronous active and standby BPU, by calculating
Phase place official post DSP inter-process phase places are consistent or constant；3rd, Ethernet synchronous bus：Using SGMII bus synchronous masters
The user of standby BPU and chain of command basic configuration；4th, High Speed Synchronous Bus：High speed serdes carried using dsp chip
Bus synchronous, active and standby BPU mass users data, control data, physical layer data and link layer data.
The signal processing method that the present invention is provided is comprised the following steps：
1）During normal work, LTE base station LTE Baseband Processing Unit signal transacting is as follows：
1.1）Upstream data：The upstream data that RRU sends is divided into two beams Jing after Light splitter toy while issuing active and standby two pieces of BP
After U, primary BPU are by normal flow process, core net is sent to by the network interface of BBU, standby BPU is according to synchronization
The user of the primary BPU for coming over and chain of command basic configuration normal process, after physical layer, link layer and network layer handles are complete,
Data are no longer uploaded to EPC by the S1 interfaces of BBU, until switch to it is primary after upload again；
1.2）Downlink data：The downlink data that EPC Jing S1 interfaces are issued issues primary BP through the switching network of BBU
Jing CPRI optical interfaces are sent to RRU after U, BPU normal process.Simultaneously the dsp chip of primary BPU passes through
The downlink data that high-speed data synchronous port receives primary BPU issues in real time the dsp chip of standby BPU, standby
Jing CPRI interfaces send after BPU process, because light protection board detects the working condition of active and standby BPU, light path are cut
To primary BPU, so RRU can not receive the CPRI optical signals that standby BPU sends；
2）There is one group of activestandby state signal between active and standby BPU, including board is in place, activestandby state, heartbeat signal, shelves are standby
BPU detects that primary BPU is in place, switch to standby or heartbeat timeout, and LTE base station LTE Baseband Processing Unit is carried out such as incision
Change：
2.1）Active-standby switch：Standby BPU is immediately set as oneself primary, while opposite end BPU is set as standby, completes B
The active-standby switch of PU, light protection board monitors in real time the state of active and standby BPU, it is found that BPU controls light and opens after switching
Pass is rapidly switched on new primary BPU；
2.2）Activestandby state synchronization：Activestandby state synchronous bus includes the Ethernet synchronous bus of the active and standby BPU of connection and is based on
The High Speed Synchronous Bus of dsp chip, Ethernet synchronous bus uses SGMII buses, the user of synchronous active and standby BPU
With chain of command basic configuration, the dsp chip inside BPU is connected by high-speed interface with High Speed Synchronous Bus, is directly passed
The bottom data and buffer status of defeated chip, by substantial amounts of user data, control data, physical layer data and link layer data
It is synchronized on standby BPU by high-speed interface；
2.3）DSP beat synchronizations：The backboard of active and standby BPU is connected using DSP beats synchronizing signal, carries out DSP
Beat synchronization, and assist in synchronization calculating is carried out by 1PPS the and TOD signals on backboard.
Further improve,
Beneficial effect of the present invention is：
1st, this patent not only solves active and standby B using the High Speed Synchronous Bus based on dsp chip processing plus timing synchronization
Upper-layer configured parameter synchronization when PU switches, also solves mass users data, control data, physical layer data and link layer data
It is synchronous.Integrality due to ensure that user and control data, original business when active and standby BPU switches that realizes is not interrupted, wink
When switch, user's unaware；
2nd, designed using the light protection board of photoswitch+Light splitter toy, RRU need not switch when switching BPU.So save
RRU is invested, and also eliminates switching and the business setup time of RRU, also ensure that the unaware switching of user.
Description of the drawings
Fig. 1 is BPU active-standby switch equipment schematic diagrams.
Fig. 2 is main/standby switching method schematic diagram of the present invention.
The BPU system block diagrams that Fig. 3 builds for TCI6638.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.
The BPU active-standby switch equipment that the present invention is used two parts as shown in figure 1, be made up of：
（1）Light path switching part：Light path switching part realize BPU and RRU interfaces CPRI fiber optic protections switching and
Light point, can physically make one piece of light protection board and be inserted in BBU cabinets.Light protection board uses FPGA, does not use CPU, no
Installation operation system, software and hardware is as far as possible simple, it is ensured that the reliability of software and hardware.RRU is sent to the CPRI light of BPU
Signal Jing Light splitter toy, 1：1 gives active and standby two pieces of BPU, is connected in the reception of BPU optical modules, makes active and standby two pieces of BPU
Receive same RRU signals.By judging active and standby two pieces of BPU states, control alternative photoswitch makes R to light protection board
The CPRI optical signal switchings that RU is received are on primary BPU.
（2）BBU cabinets part：Active and standby BPU is inserted in BBU cabinets in board form, case back plate design 4
Bar bus is switched fast to support that BPU is active and standby.Including：1st, BPU activestandby states bus：Opposite end BPU is in place for detection
And activestandby state；2nd, DSP beats synchronous bus：The inside beat of dsp chip on synchronous active and standby BPU, by calculating
Phase place official post DSP inter-process phase places are consistent or constant；3rd, Ethernet synchronous bus：Using SGMII bus synchronous masters
The user of standby BPU and chain of command basic configuration；4th, High Speed Synchronous Bus：High speed serdes carried using dsp chip
Bus synchronous, active and standby BPU mass users data, control data, physical layer data and link layer data.
The signal processing method that the present invention is provided is as shown in Fig. 2 comprise the following steps：
1）During normal work, LTE base station LTE Baseband Processing Unit signal transacting is as follows：
1.1）Upstream data：The upstream data that RRU sends is divided into two beams Jing after Light splitter toy while issuing active and standby two pieces of BP
After U, primary BPU are by normal flow process, core net is sent to by the network interface of BBU, standby BPU is according to synchronization
The user of the primary BPU for coming over and chain of command basic configuration normal process, after physical layer, link layer and network layer handles are complete,
Data are no longer uploaded to EPC by the S1 interfaces of BBU, until switch to it is primary after upload again；
1.2）Downlink data：The downlink data that EPC Jing S1 interfaces are issued issues primary BP through the switching network of BBU
Jing CPRI optical interfaces are sent to RRU after U, BPU normal process.Simultaneously the dsp chip of primary BPU passes through
The downlink data that high-speed data synchronous port receives primary BPU issues in real time the dsp chip of standby BPU, standby
Jing CPRI interfaces send after BPU process, because light protection board detects the working condition of active and standby BPU, light path are cut
To primary BPU, so RRU can not receive the CPRI optical signals that standby BPU sends；
2）There is one group of activestandby state signal between active and standby BPU, including board is in place, activestandby state, heartbeat signal, shelves are standby
BPU detects that primary BPU is in place, switch to standby or heartbeat timeout, and LTE base station LTE Baseband Processing Unit is carried out such as incision
Change：
2.1）Active-standby switch：Standby BPU is immediately set as oneself primary, while opposite end BPU is set as standby, completes B
The active-standby switch of PU, light protection board monitors in real time the state of active and standby BPU, it is found that BPU controls light and opens after switching
Pass is rapidly switched on new primary BPU；
2.2）Activestandby state synchronization：Activestandby state synchronous bus includes the Ethernet synchronous bus of the active and standby BPU of connection and is based on
The High Speed Synchronous Bus of dsp chip, Ethernet synchronous bus uses SGMII buses, the user of synchronous active and standby BPU
With chain of command basic configuration, the dsp chip inside BPU is connected by high-speed interface with High Speed Synchronous Bus, is directly passed
The bottom data and buffer status of defeated chip, by substantial amounts of user data, control data, physical layer data and link layer data
It is synchronized on standby BPU by high-speed interface；
2.3）DSP beat synchronizations：The backboard of active and standby BPU is connected using DSP beats synchronizing signal, carries out DSP
Beat synchronization, and assist in synchronization calculating is carried out by 1PPS the and TOD signals on backboard.
By taking TCI6638 systems as an example, BPU realizes that process is as follows：
TCI6638 be TI companies design multi-core DSP+ARM KeyStone framework high-performance processors, system architecture such as Fig. 2 institutes
Show.TCI6638 is used for the high speed processing of massive dataflow, calculates, and uses in a large number in LTE base station.TCI6638 has 8
TMS320C66x processors, each operating frequency 1G ~ 1.2GHz has 4 Cortex A15 arm processors, each operating frequency
1.4GHz, inside also has 4 Turbo decoders, 8 Viterbi decoders, 4 WCDA coprocessors, 6 FFT associations to process
Various application specific processors such as device, position processor accelerator, are particularly suitable for base station applies.There are 6 CPRI interfaces, 2 HyperLink to connect
Mouth, 2 10G Ethernets, 4 gigabit ethernet interfaces facilitate the equipment such as external RRU, switch, EPC.Wherein HyperLink connects
Mouth is made up of 4 groups of transmitting-receiving serdes buses, and flank speed reaches 50Gbps, can be used to transmit user data, control data, physics
Layer data and link layer data.
The BPU system block diagrams built with TCI6638 are as shown in Figure 3.1st, the AIF interfaces of TCI6638 are made into CPRI patterns, lead to
Crossing optical module uses optical fiber and RRU to connect.2nd, HyperLink is configured to 50G, by 4 groups of serdes differential lines through backboard and
The HyperLink interfaces connection of opposite end TCI6638, as high-speed data backed up in synchronization passage.3rd, the network interface of TCI6638 compares
It is many, take a gigabit network interface by SGMII patterns through backboard and opposite end BPU corresponding network interface connection, the active and standby BPU of synchronization
User and chain of command basic configuration.4th, the detection of activestandby state of the I/O port of TCI6638 as active and standby BPU and DSP sequential are same
The signal in place and primary of this plate is issued standby BPU by step signal, primary BPU, while sending the heartbeat letter of timing to standby BPU
Number, standby BPU by detecting that primary BPU boards are in place, whether activestandby state, heartbeat signal normal to judge primary BPU work,
Once noting abnormalities, this plate is set to primary, the processing function of execution base band data.The master/slave data synchronization mistake of two pieces of BPU
In Cheng Zhong, especially user data, control data, physical layer data and link layer data synchronizing process, it is related to substantial amounts of pass
Key timing rhohase synchronization, two panels TCI6638 timing synchronization signal is used for ensureing Data processing phase.CCU passes through backboard
1PPS the and TOD signals that come over can also aid in the Phase synchronization of two panels TCI6638.
Concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, some improvement can also be made, this
A little improvement also should be regarded as protection scope of the present invention.
Claims (2)
1. the active and standby signal processing method of a kind of LTE base station LTE Baseband Processing Unit, it is characterised in that comprise the following steps：
1）During normal work, LTE base station LTE Baseband Processing Unit signal transacting is as follows：
1.1）Upstream data：The upstream data that RRU sends is divided into two beams Jing after Light splitter toy while issuing active and standby two pieces of BP
After U, primary BPU are by normal flow process, core net is sent to by the network interface of BBU, standby BPU is according to synchronization
The user of the primary BPU for coming over and chain of command basic configuration normal process, after physical layer, link layer and network layer handles are complete,
Data are no longer uploaded to EPC by the S1 interfaces of BBU, until switch to it is primary after upload again；
1.2）Downlink data：The downlink data that EPC Jing S1 interfaces are issued issues primary BP through the switching network of BBU
Jing CPRI optical interfaces are sent to RRU after U, BPU normal process.
2. the lower line number that simultaneously dsp chip of primary BPU is received primary BPU by high-speed data synchronous port
The dsp chip of standby BPU is issued when factually, Jing CPRI interfaces send after standby BPU is processed, due to light protection
Plate detects the working condition of active and standby BPU, by the tangential primary BPU of light path, so RRU can not receive standby BPU
The CPRI optical signals for sending；
2）There is one group of activestandby state signal between active and standby BPU, including board is in place, activestandby state, heartbeat signal, shelves are standby
BPU detects that primary BPU is in place, switch to standby or heartbeat timeout, and LTE base station LTE Baseband Processing Unit is carried out such as incision
Change：
2.1）Active-standby switch：Standby BPU is immediately set as oneself primary, while opposite end BPU is set as standby, completes B
The active-standby switch of PU, light protection board monitors in real time the state of active and standby BPU, it is found that BPU controls light and opens after switching
Pass is rapidly switched on new primary BPU；
2.2）Activestandby state synchronization：Activestandby state synchronous bus includes the Ethernet synchronous bus of the active and standby BPU of connection and is based on
The High Speed Synchronous Bus of dsp chip, Ethernet synchronous bus uses SGMII buses, the user of synchronous active and standby BPU
With chain of command basic configuration, the dsp chip inside BPU is connected by high-speed interface with High Speed Synchronous Bus, is directly passed
The bottom data and buffer status of defeated chip, by substantial amounts of user data, control data, physical layer data and link layer data
It is synchronized on standby BPU by high-speed interface；
2.3）DSP beat synchronizations：The backboard of active and standby BPU is connected using DSP beats synchronizing signal, carries out DSP
Beat synchronization, and assist in synchronization calculating is carried out by 1PPS the and TOD signals on backboard.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611267771.2A CN106656336B (en) | 2016-12-31 | 2016-12-31 | The active and standby signal processing method of LTE base station LTE Baseband Processing Unit |
| PCT/CN2017/102521 WO2018120934A1 (en) | 2016-12-31 | 2017-09-20 | Active-standby signal processing method of lte base station baseband processing board |
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| CN201611267771.2A CN106656336B (en) | 2016-12-31 | 2016-12-31 | The active and standby signal processing method of LTE base station LTE Baseband Processing Unit |
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| CN106656336B CN106656336B (en) | 2019-06-25 |
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Cited By (6)
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| WO2018120934A1 (en) * | 2016-12-31 | 2018-07-05 | 南京泰通科技股份有限公司 | Active-standby signal processing method of lte base station baseband processing board |
| CN108462529A (en) * | 2018-04-27 | 2018-08-28 | 上海欣诺通信技术股份有限公司 | Active and standby board switching method, optical transport network device and storage medium |
| CN108599843A (en) * | 2018-05-07 | 2018-09-28 | 上海市共进通信技术有限公司 | The Function detection control method of output 1PPS and TOD signals is supported in SFP ONT optical modules and host |
| CN109257223A (en) * | 2018-09-29 | 2019-01-22 | 南京泰通科技股份有限公司 | High reliability real-time synchronization data processing equipment |
| CN113346962A (en) * | 2021-05-31 | 2021-09-03 | 浙江大华技术股份有限公司 | Radio frequency control method, device and radio frequency system |
| CN113423117A (en) * | 2021-06-03 | 2021-09-21 | 南京泰通科技股份有限公司 | Base station redundancy device and method |
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| CN110881194B (en) * | 2018-09-05 | 2023-09-19 | 广东新岸线科技有限公司 | Communication method and device based on ultra-high throughput wireless system |
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| WO2018120934A1 (en) * | 2016-12-31 | 2018-07-05 | 南京泰通科技股份有限公司 | Active-standby signal processing method of lte base station baseband processing board |
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| CN108462529B (en) * | 2018-04-27 | 2023-12-19 | 上海欣诺通信技术股份有限公司 | Main and standby board card switching method, optical transmission network equipment and storage medium |
| CN108599843A (en) * | 2018-05-07 | 2018-09-28 | 上海市共进通信技术有限公司 | The Function detection control method of output 1PPS and TOD signals is supported in SFP ONT optical modules and host |
| CN108599843B (en) * | 2018-05-07 | 2021-02-12 | 上海市共进通信技术有限公司 | Function detection control method for supporting output of 1PPS and TOD signals in SFP ONT optical module and host |
| CN109257223A (en) * | 2018-09-29 | 2019-01-22 | 南京泰通科技股份有限公司 | High reliability real-time synchronization data processing equipment |
| CN113346962A (en) * | 2021-05-31 | 2021-09-03 | 浙江大华技术股份有限公司 | Radio frequency control method, device and radio frequency system |
| CN113423117A (en) * | 2021-06-03 | 2021-09-21 | 南京泰通科技股份有限公司 | Base station redundancy device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018120934A1 (en) | 2018-07-05 |
| CN106656336B (en) | 2019-06-25 |
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