CN106656336B - The active and standby signal processing method of LTE base station LTE Baseband Processing Unit - Google Patents
The active and standby signal processing method of LTE base station LTE Baseband Processing Unit Download PDFInfo
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- CN106656336B CN106656336B CN201611267771.2A CN201611267771A CN106656336B CN 106656336 B CN106656336 B CN 106656336B CN 201611267771 A CN201611267771 A CN 201611267771A CN 106656336 B CN106656336 B CN 106656336B
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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
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
Abstract
The present invention provides a kind of active and standby signal processing methods of LTE base station LTE Baseband Processing Unit, there is one group of activestandby state signal between active and standby BPU, in place, activestandby state, heartbeat signal including board, the spare BPU of shelves detects that primary BPU is not in place, switches to spare or heartbeat timeout, oneself is set as primary by spare BPU immediately, opposite end BPU is set as spare simultaneously, completes the active-standby switch of BPU, and it is synchronous with DSP beat to complete activestandby state synchronization.The present invention not only solves upper-layer configured parameter synchronization when active and standby BPU switching, also it is synchronous that mass users data, control data, physical layer data and link layer data are solved, original business is not interrupted when realizing active and standby BPU switching, instantaneous to switch, user's unaware.
Description
Technical field
The present invention relates to LTE-R wireless mobile communication base station field, specifically a kind of active and standby letter of LTE base station LTE Baseband Processing Unit
Number processing method.
Background technique
As Chinese Railway Mobile communication bandwidth demand rapidly increases, original GSM-R system no longer adapts to new market
Demand, and with the gradually extinction of GSM industrial chain, there is an urgent need to upgrade to original GSM-R communication system.Ginseng
LTE-R Technical Standard System is being formulated according to GSM-R technical specification Chinese Railway, using newest LTE technology as next-generation
Railway Mobile Radio system.
Driving business, operation maintenance business, public safety communication business and the passenger information system industry of LTE-R carrying 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 stability, the reliability of Railroad Communication System.For
The reliability of communication system is improved, entire communication system master-slave redundancy design must be taken into consideration in when networking.Use two sets of communication systems
System, it is a set of primary, it is a set of spare, it is rapidly switched to back-up system when active system failure, guarantees that communication industry is done honest work in this way
Often work.
LTE wireless telecommunication system is made of terminal, base station and core net (EPC).Base station by baseband processing unit (BBU) and
Remote Radio Unit (RRU) is constituted.BBU is usually multi-groove rack-mounted device, interpolation central control board (CCU), Base-Band Processing
Plate (BPU), power board etc., are mounted in computer room.BBU board grade it is active and standby because be limited by rack construction, hardware plan, power consumption,
Weight, cost, operability etc., be difficult to realize, or can only achievement unit scoreboard card master-slave redundancy.BPU is most important in BBU
Board complete physical layer, MAC layer and three layer protocol functions, panel and go out CPRI optical interface using high-performance multi-core DSP chip
It is communicated with RRU.Because the data processing amount of BPU is huge, general BPU master-slave redundancy is all will be primary by the network interface of backboard
The user of BPU and control plane basic configuration are synchronized on spare BPU, the physics of a large amount of user and control data and magnanimity
Layer, link layer data can not be synchronized since expense is huge, service disconnection when leading to active-standby switch in this way, terminal to re-initiate with
Machine access application, just by processes such as wireless heterogeneous networks (RRC) foundation, radio access bearer (E-RAB) foundation
It can continue original business again.Once the business time-consuming of re-establishing is very long so BPU active-standby switch, for certain times
Sensitive business possibly can not receive.
Summary of the invention
The present invention in order to solve problems in the prior art, provides a kind of active and standby signal processing of LTE base station LTE Baseband Processing Unit
Method, the High Speed Synchronous Bus based on dsp chip, when not only solving active and standby BPU switching plus timing synchronization processing
Upper-layer configured parameter synchronization, original business is not interrupted when realizing active and standby BPU switching, instantaneous to switch, user's unaware.
The BPU active-standby switch equipment that the present invention uses is made of two parts:
(1) optical path switching part: optical path switching part realizes that the CPRI fiber optic protection of BPU and RRU interface is cut
It changes and divides with light, physically can be made one piece of light protection board and be inserted in BBU cabinet.Light protection board uses FPGA, does not use
CPU does not install operating system, and software and hardware is simple as far as possible, guarantees the reliability of software and hardware.RRU is sent to the CP of BPU
For RI optical signal through Light splitter toy, 1:1 gives active and standby two pieces of BPU, is connected in the reception of BPU optical module, makes active and standby two pieces of B
PU receives same RRU signal.Light protection board controls alternative photoswitch by judging active and standby two pieces of BPU states
Make in the received CPRI optical signal switching to primary BPU of RRU.
(2) BBU cabinet part: active and standby BPU is inserted in BBU cabinet in the form of board, case back plate design 4
Bus is to support BPU is active and standby to be switched fast.Include: 1, BPU activestandby state bus: detection opposite end BPU is in place
And activestandby state；2, DSP beat synchronous bus: the inside beat of dsp chip on active and standby BPU is synchronized, calculating is passed through
Phase official post DSP inter-process phase is consistent or constant；3, Ethernet synchronous bus: SGMII bus synchronous master is used
The user of standby BPU and control plane basic configuration；4, High Speed Synchronous Bus: the 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.
Signal processing method provided by the invention the following steps are included:
1) when working normally, LTE base station LTE Baseband Processing Unit signal processing is as follows:
1.1) upstream data: the upstream data that RRU is issued is divided into two beams after Light splitter toy while issuing active and standby two pieces of B
After PU, primary BPU are by normal flow processing, core net is sent to by the network interface of BBU, spare BPU is according to same
The user and control plane basic configuration for walking the primary BPU to come are normally handled, and physical layer, link layer and network layer handles are complete
Afterwards, the S1 interface that data no longer pass through BBU is uploaded to EPC, until switch to it is primary after upload again；
1.2) downlink data: the downlink data that EPC is issued through S1 interface is issued primary by the switching network of BBU
BPU, BPU through CPRI optical interface are sent to RRU after normally handling.The dsp chip of primary BPU simultaneously
The downlink data that primary BPU is received is issued to the dsp chip of spare BPU in real time by high-speed data synchronous port,
It is issued after spare BPU processing through CPRI interface, since light protection board detects the working condition of active and standby BPU, by light
The tangential primary BPU in road, so RRU can not receive the CPRI optical signal that spare BPU is issued；
2) there is one group of activestandby state signal between active and standby BPU, including board is in place, activestandby state, heartbeat signal, shelves
Spare BPU detects that primary BPU is not in place, switches to spare or heartbeat timeout, and LTE base station LTE Baseband Processing Unit carries out such as
Lower switching:
2.1) active-standby switch: spare BPU oneself is set as immediately it is primary, while opposite end BPU is set as it is spare, it is complete
At the active-standby switch of BPU, light protection board monitors in real time to be controlled after the state of active and standby BPU, discovery BPU switch
Photoswitch is rapidly switched on new primary BPU；
2.2) activestandby state is synchronous: activestandby state synchronous bus include connect active and standby BPU Ethernet synchronous bus and
High Speed Synchronous Bus based on dsp chip, Ethernet synchronous bus use SGMII bus, synchronize active and standby BPU's
User and control plane basic configuration, the dsp chip inside BPU are connected by high-speed interface with High Speed Synchronous Bus, directly
The bottom data and buffer status for connecing transmission chip, by a large amount of user data, control data, physical layer data and link layer
Data are synchronized on spare BPU by high-speed interface；
2.3) DSP beat is synchronous: the backboard of active and standby BPU is connected using DSP beat synchronization signal, carries out D
SP beat is synchronous, and carries out assist in synchronization calculating by 1PPS the and TOD signal on backboard.
It is further improved,
The beneficial effects of the invention are that:
1, this patent uses the High Speed Synchronous Bus based on dsp chip, is not only solving master plus timing synchronization processing
Upper-layer configured parameter synchronization when standby BPU switching also solves mass users data, control data, physical layer data and link layer
Data are synchronous.Due to ensure that user and controlling the integrality of data, when realizing active and standby BPU switching original business not in
It is disconnected, instantaneous to switch, user's unaware；
2, it is designed using photoswitch+Light splitter toy light protection board, RRU need not switch when switching BPU.In this way
RRU investment is saved, switching and the business settling time of RRU are also eliminated, also ensures the unaware switching of user.
Detailed description of the invention
Fig. 1 is BPU active-standby switch equipment schematic diagram.
Fig. 2 is main/standby switching method schematic diagram of the present invention.
Fig. 3 is the BPU system block diagram that TCI6638 is built.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The BPU active-standby switch equipment that the present invention uses two parts as shown in Figure 1, be made of:
(1) optical path switching part: optical path switching part realizes that the CPRI fiber optic protection of BPU and RRU interface is cut
It changes and divides with light, physically can be made one piece of light protection board and be inserted in BBU cabinet.Light protection board uses FPGA, does not use
CPU does not install operating system, and software and hardware is simple as far as possible, guarantees the reliability of software and hardware.RRU is sent to the CP of BPU
For RI optical signal through Light splitter toy, 1:1 gives active and standby two pieces of BPU, is connected in the reception of BPU optical module, makes active and standby two pieces of B
PU receives same RRU signal.Light protection board controls alternative photoswitch by judging active and standby two pieces of BPU states
Make in the received CPRI optical signal switching to primary BPU of RRU.
(2) BBU cabinet part: active and standby BPU is inserted in BBU cabinet in the form of board, case back plate design 4
Bus is to support BPU is active and standby to be switched fast.Include: 1, BPU activestandby state bus: detection opposite end BPU is in place
And activestandby state；2, DSP beat synchronous bus: the inside beat of dsp chip on active and standby BPU is synchronized, calculating is passed through
Phase official post DSP inter-process phase is consistent or constant；3, Ethernet synchronous bus: SGMII bus synchronous master is used
The user of standby BPU and control plane basic configuration；4, High Speed Synchronous Bus: the 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.
Signal processing method provided by the invention is as shown in Figure 2, comprising the following steps:
1) when working normally, LTE base station LTE Baseband Processing Unit signal processing is as follows:
1.1) upstream data: the upstream data that RRU is issued is divided into two beams after Light splitter toy while issuing active and standby two pieces of B
After PU, primary BPU are by normal flow processing, core net is sent to by the network interface of BBU, spare BPU is according to same
The user and control plane basic configuration for walking the primary BPU to come are normally handled, and physical layer, link layer and network layer handles are complete
Afterwards, the S1 interface that data no longer pass through BBU is uploaded to EPC, until switch to it is primary after upload again；
1.2) downlink data: the downlink data that EPC is issued through S1 interface is issued primary by the switching network of BBU
BPU, BPU through CPRI optical interface are sent to RRU after normally handling.The dsp chip of primary BPU simultaneously
The downlink data that primary BPU is received is issued to the dsp chip of spare BPU in real time by high-speed data synchronous port,
It is issued after spare BPU processing through CPRI interface, since light protection board detects the working condition of active and standby BPU, by light
The tangential primary BPU in road, so RRU can not receive the CPRI optical signal that spare BPU is issued；
2) there is one group of activestandby state signal between active and standby BPU, including board is in place, activestandby state, heartbeat signal, shelves
Spare BPU detects that primary BPU is not in place, switches to spare or heartbeat timeout, and LTE base station LTE Baseband Processing Unit carries out such as
Lower switching:
2.1) active-standby switch: spare BPU oneself is set as immediately it is primary, while opposite end BPU is set as it is spare, it is complete
At the active-standby switch of BPU, light protection board monitors in real time to be controlled after the state of active and standby BPU, discovery BPU switch
Photoswitch is rapidly switched on new primary BPU；
2.2) activestandby state is synchronous: activestandby state synchronous bus include connect active and standby BPU Ethernet synchronous bus and
High Speed Synchronous Bus based on dsp chip, Ethernet synchronous bus use SGMII bus, synchronize active and standby BPU's
User and control plane basic configuration, the dsp chip inside BPU are connected by high-speed interface with High Speed Synchronous Bus, directly
The bottom data and buffer status for connecing transmission chip, by a large amount of user data, control data, physical layer data and link layer
Data are synchronized on spare BPU by high-speed interface；
2.3) DSP beat is synchronous: the backboard of active and standby BPU is connected using DSP beat synchronization signal, carries out D
SP beat is synchronous, and carries out assist in synchronization calculating by 1PPS the and TOD signal on backboard.
By taking TCI6638 system as an example, BPU realizes that process is as follows:
TCI6638 is the multi-core DSP+ARM KeyStone framework high-performance processor of TI company design, and system architecture is such as
Shown in Fig. 2.TCI6638 is used for the high speed processing of massive dataflow, calculates, and largely uses in LTE base station.TCI6638 has 8
TMS320C66x processor, each working frequency 1G ~ 1.2GHz have 4 Cortex A15 arm processors, each working frequency
1.4GHz, internal there are also 4 Turbo decoders, 8 Viterbi decoders, 4 WCDA coprocessors, 6 FFT association processing
A variety of 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, interchanger, EPC.Wherein HyperLink connects
Mouth is made 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 diagram built with TCI6638 is as shown in Figure 3.1, the AIF interface of TCI6638 is made into CPRI mode, leads to
Optical module is crossed to connect using optical fiber with RRU.2, HyperLink is configured to 50G, by 4 groups of serdes differential lines by backboard and
The HyperLink interface of opposite end TCI6638 connects, as high-speed data backed up in synchronization channel.3, the network interface of TCI6638 compares
It is more, it takes a gigabit network interface to pass through the corresponding network interface connection of backboard and opposite end BPU by SGMII mode, synchronizes active and standby BPU
User and control plane basic configuration.4, activestandby state detection and DSP timing of the I/O port of TCI6638 as active and standby BPU are same
Signal is walked, the signal in place and primary of this plate is issued spare BPU by primary BPU, while being believed to the heartbeat of spare BPU transmission timing
Number, primary BPU board is in place, activestandby state, heartbeat signal judge that it is whether normal that primary BPU works by detecting by spare BPU,
Once noting abnormalities, this plate is set to primary, executes the processing function of base band data.The master/slave data of two pieces of BPU synchronized
In Cheng Zhong, especially user data, control data, physical layer data and link layer data synchronizing process, it is related to largely closing
Key timing rhohase is synchronous, and two panels TCI6638 timing synchronization signal is used to guarantee Data processing phase.CCU passes through backboard
1PPS the and TOD signal that comes over can also assist the Phase synchronization of two panels TCI6638.
There are many concrete application approach of the present invention, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, it can also make several improvements, this
A little improve also should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of active and standby signal processing method of LTE base station LTE Baseband Processing Unit, it is characterised in that the following steps are included:
1) when working normally, LTE base station LTE Baseband Processing Unit signal processing is as follows:
1.1) upstream data: the upstream data that RRU is issued is divided into two beams after Light splitter toy while issuing active and standby two pieces of BP
After U, primary BPU are by normal flow processing, core net is sent to by the network interface of BBU, spare BPU is according to synchronization
The user of the primary BPU to come over and control plane basic configuration are normally handled, physical layer, link layer and network layer handles it is complete after,
The S1 interface that data no longer pass through BBU is uploaded to EPC, until switch to it is primary after upload again；
1.2) downlink data: the downlink data that EPC is issued through S1 interface issues primary BP by the switching network of BBU
U, BPU through CPRI optical interface are sent to RRU after normally handling, while the dsp chip of primary BPU passes through
The downlink data that primary BPU is received is issued the dsp chip of spare BPU by high-speed data synchronous port in real time, spare
It issues after BPU processing through CPRI interface, since light protection board detects the working condition of active and standby BPU, optical path is cut
To primary BPU, so RRU can not receive the CPRI optical signal that spare BPU is issued；
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 spare
BPU detects that primary BPU is not in place, switches to spare or heartbeat timeout, and LTE base station LTE Baseband Processing Unit carries out such as incision
It changes:
2.1) active-standby switch: oneself is set as primary by spare BPU immediately, while opposite end BPU being set as spare, completes B
The active-standby switch of PU, light protection board monitor the state of active and standby BPU in real time, and control light is opened after discovery BPU switches
Pass is rapidly switched on new primary BPU；
2.2) activestandby state is synchronous: activestandby state synchronous bus includes connecting the Ethernet synchronous bus of active and standby BPU and being based on
The High Speed Synchronous Bus of dsp chip, Ethernet synchronous bus use SGMII bus, synchronize the user of active and standby BPU
With control plane basic configuration, the dsp chip inside BPU is connected by high-speed interface with High Speed Synchronous Bus, directly biography
The bottom data and buffer status of defeated chip, by a large amount of user data, control data, physical layer data and link layer data
It is synchronized on spare BPU by high-speed interface；
2.3) DSP beat is synchronous: the backboard of active and standby BPU is connected using DSP beat synchronization signal, carries out DSP
Beat is synchronous, and carries out assist in synchronization calculating by 1PPS the and TOD signal 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 |
Applications Claiming Priority (1)
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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 true CN106656336B (en) | 2019-06-25 |
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| CN106656336B (en) * | 2016-12-31 | 2019-06-25 | 南京泰通科技股份有限公司 | The active and standby signal processing method of LTE base station LTE Baseband Processing Unit |
| 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 |
| 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 |
| 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 |
| 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 |
| CN111190799B (en) * | 2019-12-30 | 2023-03-14 | 鹍骐科技（北京）股份有限公司 | Computer system capable of realizing fault board card identification |
| CN113346962B (en) * | 2021-05-31 | 2023-03-24 | 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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| WO1997009674A1 (en) * | 1995-09-01 | 1997-03-13 | Hitachi, Ltd. | Data processor |
| CN100525269C (en) * | 2006-08-03 | 2009-08-05 | 华为技术有限公司 | Base band unit ring cascade resource back-up method and base band unit |
| US7782765B2 (en) * | 2007-01-22 | 2010-08-24 | Harris Stratex Networks Operating Corporation | Distributed protection switching architecture for point-to-point microwave radio systems |
| CN101389013B (en) * | 2008-10-16 | 2012-02-29 | 中兴通讯股份有限公司 | Main and standby code stream switching implementing device, method and system for mobile multimedia broadcast system |
| CN101867951A (en) * | 2010-06-09 | 2010-10-20 | 新邮通信设备有限公司 | Availability detection method and base station, baseband processing unit and multi-software module system |
| CN102883355B (en) * | 2011-07-11 | 2014-12-10 | 中国移动通信集团公司 | Building base band unit, base band processing board and fault processing method for base band processing board |
| CN103379559A (en) * | 2012-04-26 | 2013-10-30 | 中兴通讯股份有限公司 | Access network and failure processing method and system used for access network |
| CN103905115B (en) * | 2012-12-29 | 2017-03-22 | 中国移动通信集团安徽有限公司 | Method and system for transmitting services between RRU and BBUs, and BBUs |
| CN103957536B (en) * | 2014-05-14 | 2017-03-15 | 烽火通信科技股份有限公司 | Wireless access network system based on C RAN |
| CN105912089A (en) * | 2016-04-07 | 2016-08-31 | 浪潮电子信息产业股份有限公司 | Battery redundancy method, device and system |
| CN106656336B (en) * | 2016-12-31 | 2019-06-25 | 南京泰通科技股份有限公司 | The active and standby signal processing method of LTE base station LTE Baseband Processing Unit |
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