CN104935422A - Single mode LTE-based method and system for realizing common mode LTE base station - Google Patents
Single mode LTE-based method and system for realizing common mode LTE base station Download PDFInfo
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- CN104935422A CN104935422A CN201510329253.8A CN201510329253A CN104935422A CN 104935422 A CN104935422 A CN 104935422A CN 201510329253 A CN201510329253 A CN 201510329253A CN 104935422 A CN104935422 A CN 104935422A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Abstract
The invention provides a single mode LTE-based method and a single mode LTE-based system for realizing a common mode LTE base station. The method and the system of the invention abstract a base station-level function module on a CCU to process FDD/TDD base station-level functions on the basis of using existing LTE technology and products, and simultaneously perform the same processing on the OAM and GTPU, and add an adaptation process in a cell-level function so as to solve a compatible problem. An LMT follows a principle that base station-level tables are fused and cell-level tables are independent to classify parameter configuration tables according to the base station-level functions and the district-level functions. The BPU(FDD plus TDD) maintains the existing hardware and software design, and connects with a corresponding FDD/TDD RRU to realize a base-band processing function. By using the existing technology and the product, the method and the system of the invention realize a function of the common mode LTE base station, greatly reduce the difficulty of existing LTE common mode technology and corresponding cost.
Description
Technical field
The invention belongs to the communications field, relate to a kind of method and system realizing common mode (FDD+TDD) LTE base station based on single mode LTE.
Background technology
LTE is divided into FDD, TDD two kinds of patterns, TDD be China's independent research the 4th generation communication system, have the larger market demand at home, FDD is the communication system that American-European more country uses.Two kinds of patterns respectively have superiority in covering and capacity, FDD can expand up coverage, TDD frequency range can increase downlink capacity, FDD/TDD common mode enables operator dispose TDD economically, formed with FDD network and have complementary advantages, reduce the covering cost of TDD, ensure that effective utilization of frequency spectrum, improve overlay area and the network capacity of FDD/TDD.Just because of this, make the demand of FDD/TDD common mode networking than stronger, Ge great operator also dishes out this type of demand one after another.
Existing LTE common mode method is all adopt unified shader, the method for designing that the degree of depth merges, compatible FDD and the TDD function of the degree of depth on CCU and BPU, but existing method can cause some problems: one is implement more complicated on software He on hardware, and manpower and the cost of input are higher; Two is the companies for existing ripe single mode FDD or TDD product, during redevelopment TDD/FDD common mode product, can not make full use of existing technological achievement; Three is that maintenance cost is higher.
Summary of the invention
The present invention, for reducing development cost, reduces technical difficulty, provides a kind of method and system realizing common mode LTE base station based on single mode LTE.
Technical scheme of the present invention provides a kind of method realizing common mode LTE base station based on single mode LTE, by to CCU(central control unit) carry out FDD/TDD fusion, realize LTE common mode, two BPU(baseband processing units) respectively use before single mode FDD and single mode TDD product (comprising software, hardware).This common mode method comprises following steps:
Step one, at OAM (operation management maintain) end, use the existing design of single mode LTE to bear the correlation function of FDD/TDD respectively, incompatible place takes out an adaptation module and solves compatibling problem; With OAM with the use of LMT(LMT Local Maintenance Terminal) be also by parameter configuration and management function, according to base station level function merge, the principle of cell-level functional independence, redesign configuration list item.
Step 2, base station level functional module (ENB COMMON) merges by CCU, does not distinguish FDD/TDD separately, each cell-level function keeps original design, takes out an adaptation module, is used for problem incompatible in adaptive FDD/TDD design.The function of base station level module (ENB COMMON) comprising: 1, S1 link management; 2, X2 link management; 3, non-UE level S1 signaling receives process; 4, non-UE level X2 signaling receives process; 5, non-UE level S1 signaling encapsulation and transmission; 6, non-UE level X2 signaling encapsulation and transmission; 7, UE level access Article 1 signaling process, comprise initial access, S1 switch into X2 switch into; 8, the ID resource management of all UE and maintenance; 9, the neighboring BS relationship management of all communities; 10, the data configuration process of all functions related to.
Step 3, the abstract equally base station level functional module of GTPU (user face GPRS Tunnel Protocol), and respectively adaptation processing is done to the function of FDD/TDD community, to solve FDD/TDD LTE compatibling problem.
This method uses prior art achievement to the full extent, remains existing single mode LTE function to the full extent, reduces the technical difficulty realizing common mode, and then decrease development amount.
Realize a LTE common mode system for said method, merged by CCU, adopt the existing single mode LTE BPU of two covers, form a common mode LTE system.It comprises CCU(central control unit) and BPU(baseband processing unit), RRU(radio frequency unit) and machine frame.CCU contains hardware board, CPU processor for runs software program, and provides the communication interface such as serial ports, network interface.Wherein CPU processor is used for realizing base station upper-layer protocol, data link and maintenance management function; Upper-layer protocol mainly refers to L3 (RRC/S1AP/X2AP) agreement, also comprises inside of base station practical function simultaneously; Data link is the control signal of data surface and flow process mainly;
Maintenance management is OAM (operation management maintain) correlation function mainly, realizes the maintenance and management to base station, and provides customer account management function, comprises LMT (LMT Local Maintenance Terminal) and OMC (operational administrative center).
BPU contains hardware board, for running the device such as CPU processor, FPGA, DSP of protocol layer L2 (MAC/RLC/PDCP), and provide the communication interfaces such as X2, serial ports, network interface, light mouth.Wherein CPU processor is used for realizing L2 correlation function in LTE protocol, comprises the protocol contents such as MAC/RLC/PDCP, and inside of base station practical function; FPGA is used for realizing downstream message process, and DSP message header process in upstream message; DSP is for realizing the process of upstream message;
BPU is linked together with RRU by light mouth, and uplink and downlink signals is communicated with RRU by this interface.RRU is used for realizing radio frequency correlation function, comprises reception and the transmission processing of signal.
Contrast existing common mode LTE method for designing, the present invention is by carrying out the fusion of CCU software architecture, integrated FDD and TDD single mode LTE function on CCU, base station level function is merged (comprising L3, GTPU, OAM), BPU retains original design constant (software and hardware), and whole system only needs to carry out software development on CCU merges.And existing common mode method needs to carry out degree of depth fusion to CCU and BPU, BPU needs realize FDD and TDD LTE function, exploitation needs the extensive change design carrying out software and hardware, and workload and difficulty are very large simultaneously.The present invention at utmost utilizes existing single mode LTE product and technology, can significantly reduce common mode LTE base station development difficulty and cost.
Accompanying drawing explanation
Fig. 1 is method Organization Chart of the present invention;
Fig. 2 is the system construction drawing of LTE common mode base station;
Fig. 3 is LTE common mode BTS hardware structure chart.
Embodiment
Technical scheme of the present invention provides a kind of LTE common mode method, illustrate see Fig. 1, this common mode method is to CCU(central control unit) carry out FDD/TDD fusion, realize LTE common mode, BPU(baseband processing unit) use existing single mode FDD/TDD product (comprising software, hardware) respectively.This common mode method comprises following steps:
Step one, at OAM (operation management maintain) end, use the existing design of single mode LTE to bear the correlation function of FDD/TDD respectively, the abstract adaptation module in incompatible place solves compatibling problem.With OAM with the use of LMT(LMT Local Maintenance Terminal) be also by some parameter configuration and management function, according to base station level function merge, the principle of cell-level functional independence, redesign configuration list item.
Step 2, base station level function merges by CCU, does not distinguish FDD/TDD separately, and each cell-level function keeps original design, takes out an adaptation module, is used for problem incompatible in adaptive FDD/TDD design.The function of base station level module (ENB COMMON) comprising: 1, S1 link management; 2, X2 link management; 3, non-UE level S1 signaling receives process; 4, non-UE level X2 signaling receives process; 5, non-UE level S1 signaling encapsulation and transmission; 6, non-UE level X2 signaling encapsulation and transmission; 7, UE level access Article 1 signaling process, comprise initial access, S1 switch into X2 switch into; 8, the ID resource management of all UE and maintenance; 9, the neighboring BS relationship management of all communities; 10, the data configuration process of all functions related to.
Step 3, the abstract equally base station level functional module of GTPU (user face GPRS Tunnel Protocol), and respectively adaptation processing is done to the function of FDD/TDD community, to solve FDD/TDD LTE compatibling problem.The method uses prior art achievement to the full extent, remains existing single mode LTE function to the full extent, reduces the technical difficulty realizing common mode, and then decrease development amount.
Realize a LTE common mode system for said method, referring to figs. 2 and 3, this common mode LTE device is merged by CCU, adopts the original single mode LTE BPU of 2 cover, forms a common mode LTE system.It comprises CCU(central control unit) and BPU(baseband processing unit), RRU(radio frequency unit) and machine frame.CCU contains hardware board, CPU processor for runs software program, and provides the communication interface such as serial ports, network interface.Wherein CPU processor is used for realizing base station upper-layer protocol, data link and maintenance management function; Upper-layer protocol mainly refers to L3 (RRC/S1AP/X2AP) agreement, also comprises inside of base station practical function simultaneously; Data link is the control signal of data surface and flow process mainly;
Maintenance management is OAM (operation management maintain) correlation function mainly, realizes the maintenance and management to base station, and provides customer account management function, comprises LMT (LMT Local Maintenance Terminal) and OMC (operational administrative center).
BPU contains hardware board, for running the device such as CPU processor, FPGA, DSP of protocol layer L2 (MAC/RLC/PDCP), and provide the communication interfaces such as X2, serial ports, network interface, light mouth.Wherein CPU processor is used for realizing L2 correlation function in LTE protocol, comprises the protocol contents such as MAC/RLC/PDCP, and inside of base station practical function; FPGA is used for realizing downstream message process, and DSP message header process in upstream message; DSP is for realizing the process of upstream message;
BPU is linked together with RRU by light mouth, and uplink and downlink signals is communicated with RRU by this interface.RRU is used for realizing radio frequency correlation function, comprises reception and the transmission processing of signal.
See Fig. 2 and Fig. 3, LTE common mode base station by a machine frame (comprising CCU and BPU board), and RRU, the compositions such as radio-frequency antenna.The functions such as machine frame provides power supply to supply, heat radiation, and form a containment vessel.CCU and BPU can be inserted in machine frame with the form of board and specify on slot, and CCU can only be on slot, the top, and BPU can arbitrarily be in below on 3 slots.This machine frame and CCU, BPU board are all adopt existingly to complete product, without the need to other design, can make full use of prior art accumulation.CCU provides S1 interface, can be connected with MME by this interface, also have serial ports, network interface etc. to supply the communication interfaces such as debugging and local maintenance in addition.The upper software of CCU needs to carry out corresponding modify for LTE common mode, an abstract ENB COMMON resume module base station level function (specific implementation can see above-mentioned common mode method), and the adaptation of cell-level function between FDD/TDD; The function of OAM equally also needs to do corresponding change, and an abstract base station level functional module, does adaptation processing to cell-level function, and merges according to base station level parameter list parameter configuration table, and cell-level table independently principle is configured.GTPU is like this equally.BPU (FDD+TDD) uses existing product, maintain existing hardware and Software for Design constant, BPU provides X2 interface, interconnected by between this Interface realization different base station, the same with CCU in addition, provide serial ports, network interface etc. to debug simultaneously and safeguard the interface used.BPU is upper also provides light mouth in addition, and by critical point, use optical fiber to communicate with between RRU, RRU is responsible for reception and the transmission of idle message, and RRU also needs to coordinate corresponding antenna to use simultaneously, to improve the gain of signal when sending and receive.
Claims (3)
1. realize a method for common mode LTE base station based on single mode LTE, it is characterized in that: realize LTE common mode by carrying out FDD/TDD fusion to central control unit CCU, baseband processing unit BPU uses single mode FDD/TDD product; Specifically comprise the following steps:
Step one, holds at operation management maintain OAM, and use single mode LTE to bear the function of FDD/TDD respectively, the abstract adaptation module in incompatible place solves compatibling problem; With OAM with the use of LMT Local Maintenance Terminal LMT by parameter configuration and management function, to merge according to base station level function, the principle of cell-level functional independence, redesign configuration list item;
Step 2, base station level functional module merges by CCU, does not distinguish FDD/TDD separately, and each cell-level function keeps original design, takes out an adaptation module, is used for problem incompatible in adaptive FDD/TDD design;
Step 3, the abstract equally base station level functional module of user face GPRS Tunnel Protocol GTPU, and respectively adaptation processing is done to the function of FDD/TDD community, to solve FDD/TDD LTE compatibling problem.
2. a kind of method realizing common mode LTE base station based on single mode LTE according to claim 1, is characterized in that: described base station level Implement of Function Module:
S1 link management; X2 link management; Non-UE level S1 signaling receives process; Non-UE level X2 signaling receives process; Non-UE level S1 signaling encapsulation and transmission; Non-UE level X2 signaling encapsulation and transmission; The process of UE level access Article 1 signaling, comprise initial access, S1 switch into X2 switch into; The ID resource management of all UE and maintenance; The neighboring BS relationship management of all communities; The data configuration process of all functions related to.
3. realize a system for common mode LTE base station based on single mode LTE, it is characterized in that: merged by CCU, adopt two cover single mode LTE BPU, form a common mode LTE system;
Comprise central control unit CCU, baseband processing unit BPU, radio frequency unit RRU and machine frame;
CCU contains hardware board, CPU processor for runs software program, and provides the communication interfaces such as S1, serial ports, network interface; Wherein CPU processor is used for realizing base station upper-layer protocol, data link and maintenance management function; Upper-layer protocol comprises L3 agreement and inside of base station practical function; Data link comprises control signal and the flow process of data surface; Maintenance management comprises operation management maintain OAM(Operation Administration Maintenance), realizes the maintenance and management to base station, and provides customer account management function, and customer account management comprises LMT Local Maintenance Terminal LMT and operational administrative center OMC;
BPU comprises hardware board, for running CPU processor, FPGA, DSP of protocol layer L2, and provide X2, serial ports, network interface, light port communications interface; Wherein CPU processor is used for realizing L2 correlation function in LTE protocol, comprises MAC/RLC/PDCP protocol contents, and inside of base station practical function; FPGA is used for realizing downstream message process, and DSP message header process in upstream message; DSP is for realizing the process of upstream message;
BPU is linked together with RRU by light mouth, and uplink and downlink signals is communicated with RRU by this interface;
RRU is used for realizing radio-frequency enabled, comprises reception and the transmission processing of signal.
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Address after: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee after: Wuhan post and Telecommunications Science Research Institute Co., Ltd. Address before: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee before: Wuhan Inst. of Post & Telecom Science |