CN108777875A - A kind of method for processing business and device - Google Patents

A kind of method for processing business and device Download PDF

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Publication number
CN108777875A
CN108777875A CN201810490951.XA CN201810490951A CN108777875A CN 108777875 A CN108777875 A CN 108777875A CN 201810490951 A CN201810490951 A CN 201810490951A CN 108777875 A CN108777875 A CN 108777875A
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remote radio
data
radio unit
unit
processing device
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CN201810490951.XA
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CN108777875B (en
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付永魁
朱宇霞
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Wuhan Hongxin Technology Development Co Ltd
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Beijing Northern Fiberhome Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention proposes a kind of method for processing business applied to railway vehicle-ground wireless communication system, all cells physical district ID having the same of the system；This method includes：When car-mounted terminal is in the coverage area of the first Remote Radio Unit (Radio Remote Unit, RRU), the 2nd RRU that car-mounted terminal will enter is confirmed；If the first RRU is separately connected different business processing devices from the 2nd RRU, data interchange links are established for the first business processing device of the first RRU connections and the second business processing device of the 2nd RRU connections；The user's context of car-mounted terminal is established in the second business processing device, and the first business processing device is set, transmission is merged to data；When the first RRU receive car-mounted terminal signal it is weaker, and the 2nd RRU receive car-mounted terminal signal it is stronger when, setting the second business processing device transmission is merged to data.Above-mentioned technical proposal can avoid executing cell switching temporarily in car-mounted terminal moving process, ensure that business continuance.

Description

A kind of method for processing business and device
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of method for processing business and device.
Background technology
Railway vehicle-ground wireless communication system is the dedicated mobile communication system of railway, is used for transmission a variety of vehicles in railway transportation Ground communication service data, and meet the industry requirement that railway transportation is proposed.Many companies consider LTE technologies for new at present Generation railway vehicle-ground wireless communication system.If using conventional LTE technologies, train is averaged in 300km speed per hour high-speed mobiles It must switch per 3s-7s or so once, substantially increase handover failure and call drop probability, network optimization is brought greatly It is difficult.And at the switching position of LTE cell edges, data traffic has apparent reduction, frequent switching that will seriously affect whole Body handling capacity.
In the prior art, by the way that neighboring community is merged reduction number of cells, to reducing railcar channel radio Cell switching times in letter system to reduce the handover failure and call drop probability that cell switching is brought, while reducing cell and cutting Throughput of system can be improved by changing number.It, will be in railway vehicle-ground wireless communication system at the base band of same base station such as shown in Fig. 1 Manage under unit (Building Base band Unit, BBU) each Remote Radio Unit (Radio Remote Unit, RRU cell combining) is carried out, train is made to no longer need to carry out cell switching in each RRU coverage areas at a BBU in this way, To reduce the cell switching times in train travelling process.But above-mentioned processing method is only the reduction of train in a BBU Cell switching times in coverage area, when train is move across different BBU, it is desired nonetheless to cell switching is carried out, it cannot Strict guarantee business continuance.
Invention content
Defect based on the above-mentioned prior art and deficiency, the present invention propose a kind of method for processing business, being capable of strict guarantee Business continuance.
A kind of method for processing business is applied to railway vehicle-ground wireless communication system, the railway vehicle-ground wireless communication system All cells physical district ID having the same；The method includes：
When car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to the position of the car-mounted terminal and Moving direction confirms the second Remote Radio Unit that the car-mounted terminal will enter；
If first Remote Radio Unit is separately connected different business processings from second Remote Radio Unit Device, then the first business processing device connected for first Remote Radio Unit are connected with second Remote Radio Unit The second business processing device establish data interchange links, and delete redundant data present in first business processing device Link exchange；Wherein, the different business processing device includes different baseband processing units or same baseband processing unit Different LTE Baseband Processing Unit；
The user's context of the car-mounted terminal is established in second business processing device, and first industry is set The data that business processing unit transmits first Remote Radio Unit and second Remote Radio Unit merge transmission；
When the signal for the car-mounted terminal that first Remote Radio Unit receives is less than first threshold, and described the When the signal for the car-mounted terminal that two Remote Radio Unit receive is more than second threshold, second business processing device is set The data transmitted to first Remote Radio Unit and second Remote Radio Unit merge transmission.
Optionally, second business processing device is to first Remote Radio Unit and the second remote radio list When the data of member transmission merge transmission, this method further includes：
When the car-mounted terminal signal that first Remote Radio Unit receives persistently is deteriorated and is less than third threshold value When, the data interchange links established between first business processing device and second business processing device are deleted, and delete The user's context of the car-mounted terminal in first business processing device.
Optionally, first business processing device for first Remote Radio Unit connection and second radio frequency Second business processing device of extension unit connection establishes data interchange links, including：
The first LTE Baseband Processing Unit for first Remote Radio Unit connection is connected with second Remote Radio Unit The second LTE Baseband Processing Unit establish data interchange links；
Setting first business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
First LTE Baseband Processing Unit is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out physical layer or data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
Second LTE Baseband Processing Unit is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out physical layer or data link layer merging treatment and transmission process.
Optionally, first business processing device for first Remote Radio Unit connection and second radio frequency Second business processing device of extension unit connection establishes data interchange links, including：
For the first master control processing board of the first baseband processing unit of first Remote Radio Unit connection and described the Second master control processing board of the second baseband processing unit of two Remote Radio Unit connection establishes data interchange links；
Wherein, setting first business processing device is to first Remote Radio Unit and second radio frequency The data of extension unit transmission merge transmission, including：
The first master control processing board is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
The second master control processing board is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out data link layer merging treatment and transmission process.
Optionally, second business processing device is being set to first Remote Radio Unit and second radio frequency After the data of extension unit transmission merge transmission, this method further includes：
According to the position and movement direction of the car-mounted terminal, confirm that the third radio frequency that the car-mounted terminal will enter is drawn Remote unit；
If the third Remote Radio Unit is separately connected different business processings from second Remote Radio Unit Device, then the third business processing device connected for the third Remote Radio Unit are connected with second Remote Radio Unit The second business processing device establish data interchange links, and the vehicle-mounted end is established in the third business processing device The user's context at end；Wherein, the different business processing device includes at different baseband processing units or same base band Manage the different LTE Baseband Processing Unit of unit；
When the signal for the car-mounted terminal that second Remote Radio Unit receives is less than first threshold, and described the When the signal that three Remote Radio Unit receive the car-mounted terminal is more than second threshold, the third business processing device pair is set Second Remote Radio Unit and the data of third Remote Radio Unit transmission merge transmission；
If there is the data exchange chain established between first business processing device and second business processing device Road deletes existing data interchange links and deletes the user of the car-mounted terminal in first business processing device or more Text.
A kind of method for processing business, the Base-Band Processing being applied in the baseband processing unit of railway vehicle-ground wireless communication system Plate, this method include：
The data that the first Remote Radio Unit of the LTE Baseband Processing Unit connection is sent are received, and receive adjacent base band The data that second Remote Radio Unit of the LTE Baseband Processing Unit connection of processing unit is sent；Wherein, the LTE Baseband Processing Unit and institute State between the LTE Baseband Processing Unit of adjacent baseband processing unit that there are data interchange links；
The data that the data and second Remote Radio Unit sent to first Remote Radio Unit are sent carry out Physical layer or data link layer merging treatment；
The data that merging treatment is obtained carry out uplink.
Optionally, this method further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to described second The data of Remote Radio Unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and The data for being sent to second Remote Radio Unit are sent at the base band of the second Remote Radio Unit connection Plate is managed, the LTE Baseband Processing Unit of second Remote Radio Unit connection is made to be sent to second Remote Radio Unit by described Data are sent to second Remote Radio Unit.
Optionally, this method further includes：
Determine by the LTE Baseband Processing Unit control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the remote radios of different user Unit cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cells of user It is adjacent that all there are the running time-frequency resources that the Remote Radio Unit cell of different user distributes non-overlapping copies.
A kind of method for processing business, the master control processing being applied in the baseband processing unit of railway vehicle-ground wireless communication system Plate, this method include：
Receive the process that the first Remote Radio Unit of the baseband processing unit connection where the master control processing board is sent LTE Baseband Processing Unit treated data, and receive what the second Remote Radio Unit of adjacent baseband processing unit connection was sent By LTE Baseband Processing Unit treated data；Wherein, the master control of the master control processing board and the adjacent baseband processing unit There are data interchange links between processing board；
The data that the data and second Remote Radio Unit sent to first Remote Radio Unit are sent carry out Data link layer merging treatment；
Data after merging treatment are subjected to uplink.
Optionally, this method further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to described second The data of Remote Radio Unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and The data for being sent to second Remote Radio Unit are sent at the master control for managing second Remote Radio Unit Plate is managed, the master control processing board of the second Remote Radio Unit of the management is made to be sent to second Remote Radio Unit by described Data are sent to second Remote Radio Unit.
Optionally, this method further includes：
Determine by the master control processing board control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the remote radios of different user Unit cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cells of user It is adjacent that described there are the running time-frequency resources that the Remote Radio Unit cell of different user distributes non-overlapping copies.
A kind of business processing device is applied to railway vehicle-ground wireless communication system, the railway vehicle-ground wireless communication system All cells physical district ID having the same；Described device includes：
Location management unit is used for when car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to institute The position and movement direction for stating car-mounted terminal confirms the second Remote Radio Unit that the car-mounted terminal will enter；
Data link management unit, for distinguishing when first Remote Radio Unit and second Remote Radio Unit When connecting different business processing devices, for the first business processing device of first Remote Radio Unit connection and described the Second business processing device of two Remote Radio Unit connection establishes data interchange links, and deletes the first business processing dress Redundant data link exchange present in setting；Wherein, the different business processing device includes different baseband processing unit Or the different LTE Baseband Processing Unit of same baseband processing unit；
First setting unit, for establishing the user of the car-mounted terminal or more in second business processing device Text, and first business processing device is set, first Remote Radio Unit and second Remote Radio Unit are transmitted Data merge transmission；
The signal of second setting unit, the car-mounted terminal for being received when first Remote Radio Unit is less than the One threshold value, and second Remote Radio Unit receive the car-mounted terminal signal be more than second threshold when, be arranged institute The data that the second business processing device transmits first Remote Radio Unit and second Remote Radio Unit are stated to carry out Merge transmission.
A kind of business processing device, the Base-Band Processing being applied in the baseband processing unit of railway vehicle-ground wireless communication system Plate, the device include：
First data transceiving unit, the number that the first Remote Radio Unit for receiving the LTE Baseband Processing Unit connection is sent The data sent according to the second Remote Radio Unit of the LTE Baseband Processing Unit connection of, adjacent baseband processing unit；Receive the first number Send that treated Data Concurrent give the first Remote Radio Unit, adjacent of the LTE Baseband Processing Unit connection according to processing unit Baseband processing unit LTE Baseband Processing Unit connection the second Remote Radio Unit；Receive the base in adjacent baseband processing unit First data processing unit of tape handling plate sends that treated, and Data Concurrent gives the Remote Radio Unit being connect with itself； Wherein, there are data interchange links between the LTE Baseband Processing Unit and the LTE Baseband Processing Unit of the adjacent baseband processing unit；
First data processing unit, data and second radio frequency for being sent to first Remote Radio Unit are drawn The data that remote unit is sent carry out physical layer or data link layer merging treatment, and to where the LTE Baseband Processing Unit The data that master control processing board is sent carry out downlink transmission processing.
A kind of business processing device, the master control processing being applied in the baseband processing unit of railway vehicle-ground wireless communication system Plate, the device include：
Second data transceiving unit, first for receiving the baseband processing unit connection where the master control processing board penetrates The second radio frequency by LTE Baseband Processing Unit treated data, the connection of adjacent baseband processing unit that frequency extension unit is sent is drawn Remote unit send by LTE Baseband Processing Unit treated data；It receives the second data processing unit and sends treated data And send the LTE Baseband Processing Unit being connect with first Remote Radio Unit, connect with second Remote Radio Unit it is adjacent Baseband processing unit in LTE Baseband Processing Unit；Wherein, the master of the master control processing board and the adjacent baseband processing unit There are data interchange links between control processing board；
Second data processing unit, for first Remote Radio Unit send after LTE Baseband Processing Unit is handled Data and second Remote Radio Unit send to carry out data link by LTE Baseband Processing Unit treated data laminated And handle, and downlink transmission processing is carried out to business datum.
Cell ID all in railway vehicle-ground wireless communication system is arranged to identical ID by the present invention, is equivalent to entire iron Only there are one cells for road car ground wireless communication system.And in car-mounted terminal moving process, when car-mounted terminal is in the first RRU When in coverage area, the 2nd RRU that car-mounted terminal will enter is judged in advance.If the first RRU and the 2nd RRU are separately connected not Same business processing device, then be the second business processing of the first business processing device and the 2nd RRU connections of the first RRU connections Device establishes data interchange links, and car-mounted terminal context is established in the second business processing device.It is moved in car-mounted terminal During dynamic, flexibly setting is transmitted by the first business processing device or the second business processing device pair the first RRU and the 2nd RRU Data merge transmission.The above process realizes and selects business processing device in advance in car-mounted terminal moving process, and User's context is established in advance, is avoided and is executed cell switching temporarily in car-mounted terminal moving process, ensure that business continuity Property.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of railway vehicle-ground wireless communication system topology schematic provided in an embodiment of the present invention；
Fig. 2 is a kind of railway vehicle-ground wireless communication system access planar network architecture schematic diagram provided in an embodiment of the present invention；
Fig. 3 is another railway vehicle-ground wireless communication system topology schematic provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram of method for processing business provided in an embodiment of the present invention；
Fig. 5 is base band data Unite principle schematic diagram provided in an embodiment of the present invention；
Fig. 6 is a kind of railway vehicle-ground wireless communication decorum schematic diagram of a scenario provided in an embodiment of the present invention；
Fig. 7 is another railway vehicle-ground wireless communication decorum schematic diagram of a scenario provided in an embodiment of the present invention；
Fig. 8 is the flow diagram of another method for processing business provided in an embodiment of the present invention；
Fig. 9 is the flow diagram of another method for processing business provided in an embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of business processing device provided in an embodiment of the present invention；
Figure 11 is the structural schematic diagram of another business processing device provided in an embodiment of the present invention；
Figure 12 is the structural schematic diagram of another business processing device provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of method for processing business, are specifically applied to railway vehicle-ground wireless communication system Railway vehicle-ground wireless communication method for processing business.
Specifically, the railway vehicle-ground wireless communication system architecture that the embodiment of the present invention is applied as shown in Fig. 2, including Multiple base band device ponds connect front end delivery nets and backhaul network, and master control processing board and base are respectively included in each base band device pond Tape handling plate, LTE Baseband Processing Unit extend radio frequency remote unit RRU.
In fig. 2, the transmission module in master control processing board, can according to the delineation of activities of master control processing board and LTE Baseband Processing Unit Layer 2 protocol processing (such as PDCP layers of LTE) even all of layer 2 protocol processing function of eating dishes without rice or wine of partly eating dishes without rice or wine can be undertaken.Base band Data exchange interface most terminating base band device pool controller；S1/X2 interfaces connect equipment of the core network or other base stations.Base band device Pool controller is BBU (i.e. base band device in Fig. 2) non-pond application scenarios (i.e. there is only a BBU for a website) the case where Under be degenerated to base band data interconnecting and switching equipment between BBU.
It is cut in order to which cell does not occur during ensureing that car-mounted terminal is mobile in above-mentioned railway vehicle-ground wireless communication system It changes, as shown in figure 3, each physical area Physical Cell Identifier having the same that setting car-mounted terminal of the embodiment of the present invention passes through All cells of above-mentioned railway vehicle-ground wireless communication system are arranged with identical in (PhysicalCellIdentifier, PCI) Physical district ID.By above-mentioned setting, whole network shown in Fig. 3 becomes single-frequency point list PCI networks.It is worth noting that, In order to ensure reliability, high-speed railway covering generally use at least two frequency bins cover.In addition, the base of different base stations (BBU) Station identifications are different, and corresponding Cell Global Identification CGI (CellGlobalID) also differs.
It is shown in Figure 4 based on above-mentioned setting, method for processing business disclosed by the embodiments of the present invention, including：
S401, when car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to the car-mounted terminal Position and movement direction confirms the second Remote Radio Unit that the car-mounted terminal will enter；
Specifically, when the embodiment of the present invention is set, in car-mounted terminal moving process, when car-mounted terminal is penetrated in some It is in the coverage area of frequency extension unit RRU, that is, defeated according to the positioning device on vehicle-mounted when being in the coverage area of the first RRU The moving direction of the car-mounted terminal location information and the car-mounted terminal that go out, in conjunction with the RRU in railway vehicle-ground wireless communication system Distribution situation judges next RRU that car-mounted terminal will enter, i.e. the 2nd RRU.
It is appreciated that when car-mounted terminal is in the first RRU coverage areas, the communication data of car-mounted terminal is by first RRU and the business processing device (LTE Baseband Processing Unit in such as baseband processing unit) of the first RRU connections are handled and are transmitted.
If first Remote Radio Unit is separately connected different business processings from second Remote Radio Unit Device thens follow the steps S402, is penetrated for the first business processing device and described second that first Remote Radio Unit connects Second business processing device of frequency extension unit connection establishes data interchange links, and deletes in first business processing device Existing redundant data link exchange；Wherein, the different business processing device includes different baseband processing unit or same The different LTE Baseband Processing Unit of one baseband processing unit；
Specifically, if above-mentioned first RRU connect the same business processing device with the 2nd RRU (at such as same base band Manage unit or the same LTE Baseband Processing Unit), then it can be realized to first by the business processing device according to the processing of the prior art The data processing of RRU and the 2nd RRU, to be executed at switching cell again when car-mounted terminal being avoided to cross over the first RRU and two RRU Reason.
If above-mentioned first RRU and the 2nd RRU is separately connected different business processing devices, the embodiment of the present invention First business processing device of one RRU connections and the second business processing device of the 2nd RRU connections establish data interchange links, It is exactly the business processing device foundation communication connection between two RRU, to realize data interaction.
Wherein, above-mentioned different business processing device can be the different bases that the first RRU and the 2nd RRU are separately connected Plinth processing unit BBU can also be the different bases in the same baseband processing unit BBU that the first RRU and the 2nd RRU are separately connected Tape handling plate BPU can also be the different upper layer data processing units that the first RRU and the 2nd RRU are separately connected.
S403, the user's context that the car-mounted terminal is established in second business processing device, and described in setting The data that first business processing device transmits first Remote Radio Unit and second Remote Radio Unit are closed And it transmits；
Specifically, the second business processing in the first business processing device and the 2nd RRU connections for the first RRU connections fills After setting up vertical data interchange links, the embodiment of the present invention further establishes the user of car-mounted terminal in the second business processing device Context.It is appreciated that when, there are after the user's context of car-mounted terminal, entering in car-mounted terminal in the second business processing device When in the second business processing device coverage area, you can directly to utilize the user's context of car-mounted terminal into row data communication.
Since car-mounted terminal is mostly in the first RRU coverage areas at this time, that is, it is in the clothes of the first business processing device In range of being engaged in, most of data come from the first RRU, and therefore, the embodiment of the present invention is set at this time by the first business processing device Transmission is merged to the first RRU and the 2nd RRU data transmitted.The data of namely the 2nd RRU transmission pass through the first business Data interchange links between processing unit and the second business processing device are transferred to the first business processing device, by the first business Processing unit is uniformly processed.
First business processing device is after the data of the data and the 2nd RRU transmission that receive the first RRU transmission, to the two Data merge transmission, mainly carry out upstream data merging.
On the other hand, when according to the embodiment of the present invention above-mentioned first business processing device and the second business processing device it Between establish data interchange links, and after the user's context established in the second business processing device, if car-mounted terminal Moving line has occurred change dramatically and is not introduced into the second business processing device coverage area, then needs to delete first in time It the data interchange links established between business processing device and the second business processing device and is built in the second business processing device Vertical user's context.
Specifically, assuming when train enters in the superimposed coverage area of above-mentioned first RRU and the 2nd RRU, according to this hair Bright embodiment technical solution should establish the second business of the first business processing device and the 2nd RRU connections of the first RRU connections Data interchange links between processing unit, and vehicle-mounted user's context is established inside the second business processing device.But Train not necessarily travels further into the coverage area of the 2nd RRU, and train, which may turn round or stop, to turn around to travel, and into In the coverage area for entering other RRU adjacent with the first RRU, at this point, should be according to technical solution of the embodiment of the present invention first Data interchange links are established between business processing device and other adjacent business processing devices and establish user's context in advance. At this point, the user's context previously established in the second business processing device, and in the first business processing device and the second industry Although the data interchange links established between business processing unit are established in advance according to technical solution of the embodiment of the present invention, still Practical function can't be played, therefore the number established between the first business processing device and the second business processing device should be deleted According to link exchange, and delete the user's context established in the second business processing device.
When the signal for the car-mounted terminal that first Remote Radio Unit receives is less than first threshold, and described the When the signal for the car-mounted terminal that two Remote Radio Unit receive is more than second threshold, step S404, setting described the is executed The data that two business processing devices transmit first Remote Radio Unit and second Remote Radio Unit merge Transmission.
Specifically, as car-mounted terminal is moved from the first RRU to the 2nd RRU, the signal for the first RRU that car-mounted terminal receives Intensity can be more and more weaker, and the signal strength of the 2nd RRU received on the contrary can be increasingly stronger, and most of data pass through second at this time RRU is transmitted.The embodiment of the present invention is set, when car-mounted terminal detects that the signal strength of the first RRU is less than first threshold, while the When the signal strength of two RRU is more than second threshold, the business processing device for carrying out data processing and transmission is converted, that is, is arranged Transmission is merged by the data of the second business processing device pair the first RRU and the 2nd RRU transmission.
Traditional total cell processing method is typically to be exchanged by base band data between in base station or base station, by some base band Plate (baseband board is anchor point baseband board, and corresponding BBU is anchor point BBU) is responsible for handling the data of all RRU cells.Specific packet The baseband board is included to handle and generate the downlink data of all RRU cells and be forwarded to each RRU；The upper line number of all RRU cells It is merged according in the baseband board, then carries out subsequent upstream Baseband Receiver and other each layer processing.
For thousands of kilometers of High Speed Railway of length, the above method is difficult presently, there are realizing.According to a RRU cell 1 kilometer of calculating of covering, 1000 kilometers at least need a RRU more than 500, current baseband board processing capacity to cannot be satisfied one piece of baseband board The RRU data of more than 500 a cells are handled simultaneously.
To solve the above-mentioned problems, the embodiment of the present invention is set in car-mounted terminal traveling process, according to car-mounted terminal position It sets and moving direction selects anchor point baseband board, that is, set in advance in advance in real time in conjunction with preconfigured network topological information It sets and transmission is merged to the data of each RRU by which business processing device.I.e. as above-mentioned, when car-mounted terminal is in first When in RRU coverage areas, data are carried out by the first business processing device of the first RRU connections and merge transmission；When car-mounted terminal is sailed When going out the first RRU coverage areas and entering the 2nd RRU coverage areas, it is changed to by the second business processing device of the 2nd RRU connections It carries out data and merges transmission, and period fulfils the data between the first business processing device and the second business processing device ahead of schedule Link exchange is established.In order to ensure that car-mounted terminal connects across business when different base station or the different LTE Baseband Processing Unit of same base It is continuous, it also should be guaranteed that clock is synchronous between LTE Baseband Processing Unit between base station, specific synchronous method can refer to prior art reality It is existing.
It illustrates, in the embodiment of the present invention and follow-up each embodiment explanation, by car-mounted terminal selection for carrying out The business processing device of data transmission, such as the unit B BU of LTE Baseband Processing Unit BPU, Base-Band Processing, master control processing board are named as anchor Point business processing device, such as anchor point BPU, anchor point BBU, anchor point master control processing board.
By above-mentioned introduction as it can be seen that cell ID all in railway vehicle-ground wireless communication system is arranged the embodiment of the present invention At identical ID, being equivalent to entire railway vehicle-ground wireless communication system, only there are one cells.And in car-mounted terminal moving process In, when car-mounted terminal is in the first RRU coverage areas, the 2nd RRU that car-mounted terminal will enter is judged in advance.If the One RRU and the 2nd RRU are separately connected different business processing devices, then for the first business processing device of the first RRU connections and Second business processing device of the 2nd RRU connections establishes data interchange links, and establishes vehicle in the second business processing device Mounted terminal context.In car-mounted terminal moving process, flexibly setting is filled by the first business processing device or the second business processing It sets and transmission is merged to the data of the first RRU and the 2nd RRU transmission.The above process realizes in car-mounted terminal moving process Business processing device is selected in advance, and establishes user's context in advance, is avoided and is held temporarily in car-mounted terminal moving process Row cell switches, and ensure that business continuance.
Optionally, it also discloses in another embodiment of the present invention, in second business processing device pair first When Remote Radio Unit and the data of the second Remote Radio Unit transmission merge transmission, when first Remote Radio Unit When the car-mounted terminal signal received is persistently deteriorated and is less than third threshold value, first business processing device and institute are deleted The data interchange links established between the second business processing device are stated, and are deleted described vehicle-mounted in first business processing device The user's context of terminal.
Specifically, when car-mounted terminal progresses into the coverage area of the 2nd RRU from the coverage area of the first RRU, this hair Bright embodiment adjustment is closed by the data of the first business processing device pair the first RRU and the 2nd RRU transmission of the first RRU connections And transmit, become to be closed by the data of the second business processing device pair the first RRU and the 2nd RRU transmission of the second RRU connections And it transmits.
Continuous with car-mounted terminal moves ahead, and the signal strength for the first RRU that car-mounted terminal receives can persistently die down, when When car-mounted terminal is thoroughly detached from the coverage area of the first RRU, the signal strength for the first RRU that car-mounted terminal receives is very weak, No data are transmitted by the first RRU again at this time, on the car-mounted terminal user in the business processing device of the first RRU connections It does not act on hereafter.
Therefore, the embodiment of the present invention is set, when car-mounted terminal detects that the signal strength of the first RRU persistently dies down, and Less than setting third threshold value when, illustrate that car-mounted terminal has completely disengaged the coverage area of the first RRU, delete first at this time Data interchange links between first business processing device of RRU connections and the second business processing device of the 2nd RRU connections, and And delete the user's context of the car-mounted terminal in above-mentioned first business processing device.In follow-up vehicle-ground wireless communication process In, it can be handled completely by the second business processing device of the 2nd RRU and its connection.
As it can be seen that business processing device progress is set in advance in technical solution of the embodiment of the present invention in car-mounted terminal traveling process While data merge transmission, useless data connection link is also removed in time, and system is reduced while ensureing business continuance System complexity.
Optionally, it also discloses in another embodiment of the present invention, it is described to connect for first Remote Radio Unit The second business processing device that the first business processing device connect is connected with second Remote Radio Unit establishes data exchange Link, including：
The first LTE Baseband Processing Unit for first Remote Radio Unit connection is connected with second Remote Radio Unit The second LTE Baseband Processing Unit establish data interchange links；
Setting first business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
First LTE Baseband Processing Unit is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out physical layer or data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
Second LTE Baseband Processing Unit is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out physical layer or data link layer merging treatment and transmission process.
Specifically, due to the car-mounted terminal actually accessed in some base station range in railway vehicle-ground wireless communication system It is less, therefore in order to enable base station efficiently to merge transmission to communication data, on the basis of conventional cell merges, this Inventive embodiments use following processing mode：
The method of cell combining is configurable, supports that physical layer (layer 1) merges or data link layer (layer 2) merges.
Wherein, the merging of layer 1 can be that radio frequency merges, and can also be that base band merges.
Radio frequency merging can raise bottom and make an uproar, but can reduce the data volume of IR interfaces transmission.Base band Unite principle is as shown in Figure 5 (by taking LTE standards as an example, noticing that the physical area in figure is exactly RRU cells), demodulation gain can be brought by merging multi-antenna data, be carried Row demodulation performance is gone up, the disadvantage is that occupying larger IR interface transmission bandwidths.
Layer 2, which merges, usually to be realized in the MAC of inclined bottom.In this case, baseband processing portion be indifferent to RRU cells and The difference of logic district, the routine for according to the configuration of control plane and the control of MAC schedulers be similar under non-cell conditions altogether Processing, the multi-antenna data for not having to carry out RRU cells in uplink merge.Layer 2 merge base band because without uplink merge and Realize demodulation gain that is relatively easy, but being unable to get multiple antennas merging.In addition, what layer 2 merged is data after Base-Band Processing, The data volume that directly participation is combined is compared with the merging of RRU cell multi-antenna datas to be greatly reduced.
For railway wireless communication application scenarios, when train moves in two RRU cell coverage areas of total cell, Typically from one RRU is increasingly closer, more and more remoter away from another RRU.In this case, it is small to correspond to RRU by the two RRU The Doppler frequency shift in area is different and direction to be compensated in the case of high-speed mobile on the contrary, be especially apparent, and needs are in base in this way It needs to carry out frequency correction for each RRU cells in the case of tape merge, improves the complexity of system, once and frequency school Just there is error, then to merge demodulation gain limited.
Based on the description of above-mentioned cell combining method advantage and disadvantage, the embodiment of the present invention for cover preferable high-speed railway or The limited occasion of person's IR interface data transmissions considers that configuration layer 2 merges；Bottleneck is not present for low speed and IR interface data transmissions Occasion, it may be considered that configuration layer 1 merge.
Layer 2 is merged, in order to be further reduced the limited influence of IR interfaces transmission, in the RRU cells that single base station merges L2 can be further put into master control processing board in the case that negligible amounts and master control processing board processing capacity are enough (at present usually At least RLC and MAC layer are placed on to be handled on baseband board).
Namely the configurable method of cell combining can be that 1 base band of layer merges, LTE Baseband Processing Unit layer 2 merges, at master control altogether Plate layer 2 is managed to merge.
In the case where layer 1 merges or LTE Baseband Processing Unit layer 2 merges, it is thus necessary to determine which block base band of that base station Scheduler in processing board executes the distribution of final uplink service merging and downlink business, that is, needs to be anchored LTE Baseband Processing Unit (certainly, while it needs to be determined that anchor base stations)；Which for the occasion that master control processing board layer 2 merges, need to only determine in BBU Master control processing board scheduler is responsible for executing the distribution of final uplink service merging and downlink business.At this point, corresponding base Tape handling plate is anchor point LTE Baseband Processing Unit, corresponding base station is anchor base station, corresponding BBU is anchor point BBU, corresponding RRU is Anchor point RRU.
The embodiment of the present invention introduces the processing procedure that data merging is carried out by LTE Baseband Processing Unit.It can by above-mentioned introduction See, it includes that LTE Baseband Processing Unit carries out physical layer merging or data link layer merging to data that LTE Baseband Processing Unit, which carries out data merging,.
It is appreciated that when carrying out data by LTE Baseband Processing Unit and merging transmission, LTE Baseband Processing Unit as business processing device, It is the first business processing device and described the of first Remote Radio Unit connection in technical solution of the embodiment of the present invention Second business processing device of two Remote Radio Unit connection establishes data interchange links, is specially first remote radio The second LTE Baseband Processing Unit that first LTE Baseband Processing Unit of unit connection is connected with second Remote Radio Unit establishes data friendship Change link.
At this point, setting first business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, and first LTE Baseband Processing Unit is specially arranged to first Remote Radio Unit Physical layer or data link layer merging treatment and transmission process are carried out with the data of second Remote Radio Unit transmission；
Setting second business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, and second LTE Baseband Processing Unit is specially arranged to first Remote Radio Unit Physical layer or data link layer merging treatment and transmission process are carried out with the data of second Remote Radio Unit transmission.
The above process is to illustrate in car-mounted terminal moving process, the process of dynamic select anchor point LTE Baseband Processing Unit.
If the RRU cell combining capabilities of a baseband board are n, then the two of its coverage edge RRU cells may For dynamically merging, it is n-2 to participate in fixed combined RRU cell numbers.Citing is as shown in Figure 6, when train downline moves When, the corresponding anchoring baseband board number in a base station is BPU1~BPUm, the RRU of each baseband board connection is along iron Route arrangement number is 1~n.Then the corresponding RRU of BPU1 are RRU1,1~RRU1,n, the corresponding RRU of BPU2 are RRU2,1~ RRU2,n,…,BPUmCorresponding RRU is RRUm,1~RRUm,n.The RRU of baseband board coverage edge is RRU1,1, RRU1,n, RRU2,1, RRU2, n…RRUm,1,RRUm,n, the data of these RRU may be by the baseband board processing of oneself connection, it is also possible to give phase Adjacent anchor point baseband board is handled.
Such as in Fig. 6, when train is moved to RRU1, nAnd RRU2,1The position of covering, just having started anchor point LTE Baseband Processing Unit is BPU1, anchor point RRU is RRU1,n, because mobile next direction is by BPU2The RRU of connection2,1It is covered, therefore needs handle in advance RRU2,1Corresponding BPU2Base band data interchanger in plate, base band data Switching Module, BPU in master control processing board1Base band number in plate According to the good commutative relation of switch configuration, that is, it is BPU1And BPU2Set data interchange links.At baseband module, L2 Reason module and IR interface processing modules are also hung on baseband board data switching exchane, as long as the configuration of above-mentioned access is normal, BPU1And BPU2 Between can neatly exchange various types of base band datas.
For example, if the merging algorithm of configuration merges for 1 base band of layer, in up direction RRU2,1Uplink IR interface data The base band data of carrying can give BPU by above-mentioned access1Baseband module merge processing, i.e. BPU1What uplink merged RRU is not necessarily connected directly between this plate；If the merging algorithm of configuration merges for LTE Baseband Processing Unit layer 2, BPU1Interior L2 handles mould MAC schedulers in the block can come from RRU with scheduled reception2,1And pass through BPU2Baseband module treated decoding data, and carry out Merge, it is follow-up to carry out each layer processing such as RLC, because needing to carry out Base-Band Processing, BPU at this time2Interior baseband module there must be The user's context of corresponding car-mounted terminal, for convenience of handling, it is aforementioned pre-set commutative relation while in BPU2Interior foundation The user's context of the terminal.With the further movement of train, when from RRU1,nThe the data-signal of upper reception the next weak (to pass through The uplink probing reference signal SRS of detection terminal, and the thresholding of setting compare), BPU2The anchor point base band of the terminal will be upgraded to Processing board, and processing and transmission, aforementioned BPU are merged to data with reference to the above method1And BPU2Between data channel will be by It deletes, BPU is deleted while deleting the channel1The user's context of the interior car-mounted terminal.
Optionally, it further discloses in another embodiment of the present invention, described is the first remote radio list The second business processing device that first business processing device of member connection is connected with second Remote Radio Unit establishes data Link exchange, including：
For the first master control processing board of the first baseband processing unit of first Remote Radio Unit connection and described the Second master control processing board of the second baseband processing unit of two Remote Radio Unit connection establishes data interchange links；
Wherein, setting first business processing device is to first Remote Radio Unit and second radio frequency The data of extension unit transmission merge transmission, including：
The first master control processing board is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
The second master control processing board is arranged to pass first Remote Radio Unit and second Remote Radio Unit Defeated data carry out data link layer merging treatment and transmission process.
Specifically, the embodiment of the present invention disclosed is car-mounted terminal cross over adjacent base station when, dynamic select anchor base station, That is dynamic anchoring anchor point master control processing board, and realize that data merge the processing procedure of transmission using master control processing board.
Data are in MAC layer, i.e. (L2 layers) merging of data link layer at this time, and L2 modules (including MAC schedulers) are put into It is focused in master control processing board.
Shown in Figure 7, the moving direction of train is that the RRU cell coverage areas serviced from BBU1 are serviced to BBU2 RRU cell coverage areas.When the BBU of anchor base station is BBU1, control module is according to car-mounted terminal moving direction and in advance It first configures, determines that BBU2 may be next possible anchor point BBU, then establish the context of the car-mounted terminal in BBU2, together Base band data Switching Module-base band device pool controller base band data exchanges in L2 modules-master control processing board in Shi Jianli BBU1 In module-BBU2 in base band data Switching Module-BBU2 BPU1 base band datas interchanger-baseband module data channel.BBU1 The BPU1 that interior L2 modules (being specially MAC schedulers) can dispatch BBU2 passes through the RRU of connection1,1Carry out the car-mounted terminal data Transmitting-receiving, but the position finally merged is in the L2 modules of BBU1.With the further movement of train, when BBU1 detects this base station Connect RRU1, nReceive the car-mounted terminal signal it is more and more weaker, be detected simultaneously by the RRU of BBU2 connections1,1This received is vehicle-mounted Terminal signaling is more and more stronger, then anchor base station is transferred in BBU2, delete the car-mounted terminal user's context in BBU1 and Aforementioned data channel, when the car-mounted terminal further moves to BBU2 and next base station (such as corresponding BBU is BBU3) covering The neighbouring RRU of BBU3 and BBU2 is then anchored to BBU2 and merges processing by the position of overlapping.With the side being anchored based on baseband board Method is the same, is compared by detecting the intensity and quality of car-mounted terminal SRS and setting thresholding on each RRU, it is determined whether replace anchor Point BBU, the corresponding base band operation exchange access between user's context and the BBU that dismantles in former anchor point BBU is deleted.
Optionally, it also discloses in another embodiment of the present invention, second business processing device pair is being set After first Remote Radio Unit and the data of second Remote Radio Unit transmission merge transmission, this method is also wrapped It includes：
According to the position and movement direction of the car-mounted terminal, confirm that the third radio frequency that the car-mounted terminal will enter is drawn Remote unit；
If the third Remote Radio Unit is separately connected different business processings from second Remote Radio Unit Device, then the third business processing device connected for the third Remote Radio Unit are connected with second Remote Radio Unit The second business processing device establish data interchange links, and the vehicle-mounted end is established in the third business processing device The user's context at end；Wherein, the different business processing device includes at different baseband processing units or same base band Manage the different LTE Baseband Processing Unit of unit；
When the signal for the car-mounted terminal that second Remote Radio Unit receives is less than first threshold, and described the When the signal that three Remote Radio Unit receive the car-mounted terminal is more than second threshold, the third business processing device pair is set Second Remote Radio Unit and the data of third Remote Radio Unit transmission merge transmission；
If there is the data exchange chain established between first business processing device and second business processing device Road deletes existing data interchange links and deletes the user of the car-mounted terminal in first business processing device or more Text.
Specifically, the technical solution disclosed in embodiment of the method as shown in fig. 4 is identical, disclosed in the embodiment of the present invention Technical solution be intended to further illustrate, when the traveling with car-mounted terminal, from the coverage area of the second Remote Radio Unit into When entering the coverage area of third Remote Radio Unit, drawn with reference to from the coverage area of the first Remote Radio Unit into the second radio frequency The processing procedure when coverage area of remote unit, executes the selection of data link setup and anchor point business processing device in advance. Its concrete processing procedure, refers to the various embodiments described above introduction, and the present embodiment is no longer described in detail.
It can be defined by above-mentioned introduction, the method for processing business that the embodiment of the present invention is proposed, be in car-mounted terminal row Into the LTE Baseband Processing Unit of baseband processing unit or the master control processing board of base station in the process, is anchored in time, by LTE Baseband Processing Unit or master It controls processing board and realizes that data of car-mounted terminal when cell merge transmission.
Above example mainly describes the base for establishing data interchange links and car-mounted terminal anchoring baseband processing unit The process of the master control processing board of tape handling plate or base station.Correspondingly, the embodiment of the invention also discloses applied to Base-Band Processing list The method for processing business of LTE Baseband Processing Unit in member.
It is shown in Figure 8, the Base-Band Processing list disclosed by the embodiments of the present invention applied to railway vehicle-ground wireless communication system The method for processing business of LTE Baseband Processing Unit in member, including：
The data that S801, the first Remote Radio Unit for receiving the LTE Baseband Processing Unit connection are sent, and receive adjacent Baseband processing unit LTE Baseband Processing Unit connection the second Remote Radio Unit send data；Wherein, the Base-Band Processing There are data interchange links between plate and the LTE Baseband Processing Unit of the adjacent baseband processing unit；
It is the first RRU connections specifically, when car-mounted terminal is in the superimposed coverage area of the first RRU and the 2nd RRU Data interchange links, the Base-Band Processing of the 2nd RRU connections are established between LTE Baseband Processing Unit and the LTE Baseband Processing Unit of the 2nd RRU connections After plate receives the data from the 2nd RRU, it is sent to the LTE Baseband Processing Unit of the first RRU connections.
Such as in Fig. 6, when train is moved to RRU1, nAnd RRU2,1The position of covering, just having started anchor point LTE Baseband Processing Unit is BPU1, anchor point RRU is RRU1,n, because mobile next direction is by BPU2The RRU of connection2,1It is covered, therefore needs handle in advance RRU2,1Corresponding BPU2Base band data interchanger in plate, base band data Switching Module, BPU in master control processing board1Base band number in plate According to the good commutative relation of switch configuration, that is, it is BPU1And BPU2Set data interchange links.At baseband module, L2 Reason module and IR interface processing modules are also hung on baseband board data switching exchane, as long as the configuration of above-mentioned access is normal, BPU1And BPU2 Between can neatly exchange various types of base band datas.
The data of S802, data and second Remote Radio Unit transmission that first Remote Radio Unit is sent Carry out physical layer or data link layer merging treatment；
S803, the data for obtaining merging treatment carry out uplink.
Specifically, the base band that the data that the first RRU of LTE Baseband Processing Unit pair of the first RRU connections is sent are connected with the 2nd RRU The data that processing board is sent carry out the merging treatment of physical layer (L1 layers) or data link layer (L2 layers).
If the merging algorithm of configuration merges for 1 base band of layer, in up direction RRU2,1Uplink IR interface data carrying Base band data can give BPU by above-mentioned access1Baseband module merge processing, i.e. BPU1The RRU that uplink merges differs Surely it is connected directly between this plate；If the merging algorithm of configuration merges for LTE Baseband Processing Unit layer 2, BPU1In interior L2 processing modules MAC schedulers can come from RRU with scheduled reception2,1And pass through BPU2Baseband module treated decoding data, and merge, It is follow-up to carry out each layer processing such as RLC.
Optionally, in another embodiment of the present invention, it also discloses in downlink data transmission, LTE Baseband Processing Unit Processing procedure.The embodiment of the invention discloses base of the above application in the baseband processing unit of railway vehicle-ground wireless communication system The method for processing business of tape handling plate further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to described second The data of Remote Radio Unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and The data for being sent to second Remote Radio Unit are sent at the base band of the second Remote Radio Unit connection Plate is managed, the LTE Baseband Processing Unit of second Remote Radio Unit connection is made to be sent to second Remote Radio Unit by described Data are sent to second Remote Radio Unit.
Specifically, during downlink data transmission, when LTE Baseband Processing Unit receives downlink data, parse under this first Row data are destined to the first RRU's, are also destined to the 2nd RRU's.If being destined to the data of the first RRU, directly It is sent to the first RRU of LTE Baseband Processing Unit connection；If being destined to the 2nd RRU, which will be sent to The data of 2nd RRU are sent to the LTE Baseband Processing Unit of the 2nd RRU connections, by the LTE Baseband Processing Unit of the 2nd RRU connections by the data It is sent to the 2nd RRU.
Optionally, it also discloses in another embodiment of the present invention, this method includes：
Determine by the LTE Baseband Processing Unit control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the remote radios of different user Unit cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cells of user It is adjacent that all there are the running time-frequency resources that the Remote Radio Unit cell of different user distributes non-overlapping copies.
Specifically, different with conventional method, the embodiment of the present invention is distributed using the linear of railway vehicle-ground wireless communication system Feature is pre-configured with the RRU that the car-mounted terminal within the scope of some specific RRU cell serves may use, and from time-frequency two-dimensional Angle is staggered possible interference.
MAC schedulers are that each car-mounted terminal selects possible downlink to send RRU and uplink receiving RRU, are paid attention in railway Under linear distribution situation, each car-mounted terminal at most interacts transceiving datas with two RRU simultaneously (this type RRU is service RRU). The selectivity of uplink and downlink sends and receives function and can configure, using switch control (this switch is defined as capacity boost switch), only It is used when having demand to capacity.
Opened when capacity boost switchs, total dispatching principle be on the service RRU of car-mounted terminal the RRU cells established with i.e. Resource cannot be occurred by not yet providing entrance and to the car-mounted terminal RRU cells established on the RRU (being known as candidate RRU) of business Collision (resource collision is that different car-mounted terminals in some scheduling range uses identical resource).
The specific steps are：
Scheduler control baseband module measures the uplink signal of each car-mounted terminal, determines that it services RRU, so that it is determined that its position It sets；
The type of uplink signal and specific technical system have relationship.For example use LTE：When user is in access, It measures leading；When user is successfully accessed, measurement uplink SRS (needs to configure car-mounted terminal and sends full bandwidth SRS to survey at this time Amount)；
According to preconfigured RRU geographical location information each car-mounted terminal is determined in conjunction with the moving direction of car-mounted terminal Candidate RRU；
Car-mounted terminal is generally in connected state always, is configured, be can determine that by its history anchor point RRU information and network topology Its moving direction；
Scheduler is to the terminal distribution uplink and downlink resource in its control range.
The embodiment of the invention discloses when the mode using anchoring baseband board carries out real-time data merging transmission, avoid The processing method that each RRU cells of LTE Baseband Processing Unit collide.
When being configured to the mode using anchoring baseband board, MAC schedulers are located in LTE Baseband Processing Unit, anchor point baseband board control Each RRU cells of system, the terminal resource distribution in adjacent RRU cells should ensure that there is no the possibility to collide, at this time It also needs to consider to whether there is user in corresponding RRU cells.The specific steps are：
Determination receives the control of anchor point baseband board and there are the RRU cells of user；
To anchor point baseband board control each of be attached with user (some possible car-mounted terminal is covered by two RRU cells, And two RRU can receive and dispatch the data of the car-mounted terminal, the two RRU cells should be determined as there is user at this time) RRU it is small Area (cell is defined as benchmark cell), counting it, there are the adjacent RRU cells numbers of different user (linearly to be covered in railway In the case of, most two, left and right each one notices that the user in user existing for adjacent cell at this time and said reference RRU cells answers It is different), calculating resource that the RRU cells may use, (a kind of simple method is equal in the cell and the above-mentioned neighbour minizones RRU Divide resource), and record the resource location being assigned to.Pay attention to being located in baseband board due to scheduler, if neighbour's RRU cells are by addition One baseband board control, possibly can not know whether the neighbour RRU cells have user, possible method a kind of at this time is in time at this time Using configured in advance resource partition strategy (such as LTE, benchmark RRU cells and other one piece of baseband board control Adjacent RRU cells respectively use the top and the bottom position of frequency domain, are 50 RB under 20M bandwidth situations, are staggered to reach frequency domain position Purpose)；
The RRU cells of user are attached with to each of anchor point baseband board control, according to the scheduling of resource being assigned in it User；Dispatching method is identical with routine dispactching method at this time, and only scheduling resource is limited.
The embodiment of the invention also discloses in a kind of baseband processing unit applied to railway vehicle-ground wireless communication system The method for processing business of master control processing board.
It is shown in Figure 9, the Base-Band Processing list disclosed by the embodiments of the present invention applied to railway vehicle-ground wireless communication system The method for processing business of master control processing board in member, including：
What S901, the first Remote Radio Unit for receiving the baseband processing unit connection where the master control processing board were sent By LTE Baseband Processing Unit treated data, and receive the second Remote Radio Unit hair of adjacent baseband processing unit connection Send by LTE Baseband Processing Unit treated data；Wherein, the master control processing board and the adjacent baseband processing unit There are data interchange links between master control processing board；
Specifically, when car-mounted terminal is in the superimposed coverage area of the first RRU and the 2nd RRU, for the first RRU's of management Data interchange links, the master control processing of the 2nd RRU of management are established between master control processing board and the master control processing board for managing the 2nd RRU After plate receives the data from the 2nd RRU, it is sent to the master control processing board of the first RRU of management.
Shown in Figure 7, the moving direction of train is that the RRU cell coverage areas serviced from BBU1 are serviced to BBU2 RRU cell coverage areas.When the BBU of anchor base station is BBU1, control module is according to car-mounted terminal moving direction and in advance It first configures, determines that BBU2 may be next possible anchor point BBU, then establish the context of the car-mounted terminal in BBU2, together Base band data Switching Module-base band device pool controller base band data exchanges in L2 modules-master control processing board in Shi Jianli BBU1 In module-BBU2 in base band data Switching Module-BBU2 BPU1 base band datas interchanger-baseband module data channel.
The data of S902, data and second Remote Radio Unit transmission that first Remote Radio Unit is sent Carry out data link layer merging treatment；
S903, the data after merging treatment are subjected to uplink.
Specifically, the BPU1 that the L2 modules (being specially MAC schedulers) in BBU1 can dispatch BBU2 passes through the RRU of connection1,1 L2 module of the position for carrying out the transmitting-receiving of the car-mounted terminal data, but finally merging in BBU1.I.e. at the master control of the first RRU of management After managing the data that plate receives data and the 2nd RRU transmissions that the first RRU is sent, the merging of data link layer (L2 layers) is carried out, and Data after merging are subjected to uplink.
Optionally, it also discloses in another embodiment of the present invention, this method further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to described second The data of Remote Radio Unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and The data for being sent to second Remote Radio Unit are sent at the master control for managing second Remote Radio Unit It manages plate, the master control processing board of management second Remote Radio Unit is made to be sent to second Remote Radio Unit by described Data are sent to second Remote Radio Unit.
Specifically, during downlink data transmission, when master control processing board receives downlink data, parse under this first Row data are destined to the first RRU's, are also destined to the 2nd RRU's.If being destined to the data of the first RRU, directly It is sent to the first RRU of master control processing board management；If being destined to the 2nd RRU, which will be sent to The data of 2nd RRU are sent to the master control processing board of the 2nd RRU of management, by managing the master control processing board of the 2nd RRU by the data It is sent to the 2nd RRU.
Optionally, in another embodiment of the present invention, this method further includes：
Determine by the master control processing board control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the remote radios of different user Unit cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cells of user It is adjacent that described there are the running time-frequency resources that the Remote Radio Unit cell of different user distributes non-overlapping copies.
Specifically, the embodiment of the invention discloses merge transmission when the mode using anchor base stations carries out real-time data When, the processing method that avoids each RRU cells of base station from colliding.
When being configured to the mode using anchor base stations, MAC schedulers are located in master control processing board, the number of terminals of schedulable Amount is relatively more, and principle is each RRU cells of anchor base station control at this time, the terminal resource distribution in adjacent RRU cells It should ensure that there is no the possibility to collide, also need to consider to whether there is user in corresponding RRU cells at this time.Specific steps For：
Determination receives anchor base station control and the RRU cells there are user；
To anchor base station control each of be attached with user (some possible car-mounted terminal is covered by two RRU cells, and Two RRU can receive and dispatch the data of the car-mounted terminal, the two RRU cells should be determined as there is user at this time) RRU it is small Area, count its there are the adjacent RRU cells number of different user (in the case where railway linearly covers, most two, left and right each one It is a, notice that the user in user existing for adjacent cell at this time and said reference RRU cells answers difference), calculating the RRU cells may The resource (a kind of simple method be to divide equally resource in the cell and the above-mentioned neighbour minizones RRU) that uses, and record and be assigned to Resource location.Pay attention to being located in master control processing board due to scheduler, if neighbour's RRU cells are controlled by another base station, at this time It can not know whether the neighbour RRU cells have user in real time, possible method a kind of at this time is divided using the resource of configured in advance Strategy (such as LTE, benchmark RRU cells and another base station control adjacent RRU cells respectively use frequency domain up and down Portion is 50 RB under 20M bandwidth situations, to achieve the purpose that frequency domain position is staggered)；
The RRU cells of user are attached with to each of anchor base station control, according to use of the scheduling of resource being assigned in it Family.Dispatching method is identical with routine dispactching method at this time, and only scheduling resource may be limited.
By the above method, for there is no the car-mounted terminals of the RRU cells of resource collision, inside attachment can use entirely The resource in portion, to improve power system capacity.
The embodiment of the invention also discloses a kind of business processing device, which is applied to railway vehicle-ground wireless communication system System, all cells physical district ID having the same of the railway vehicle-ground wireless communication system；It is shown in Figure 10, the dress Set including：
Location management unit 100 is used for when car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to The position and movement direction of the car-mounted terminal confirms the second Remote Radio Unit that the car-mounted terminal will enter；
Data link management unit 110, for when first Remote Radio Unit and second Remote Radio Unit When being separately connected different business processing devices, the first business processing device for first Remote Radio Unit connection and institute The second business processing device for stating the connection of the second Remote Radio Unit establishes data interchange links, and deletes at first business Manage redundant data link exchange present in device；Wherein, the different business processing device includes different Base-Band Processing The different LTE Baseband Processing Unit of unit or same baseband processing unit；
First setting unit 120, the user for establishing the car-mounted terminal in second business processing device Hereafter, and first business processing device is set to first Remote Radio Unit and second Remote Radio Unit biography Defeated data merge transmission；
The signal of second setting unit 130, the car-mounted terminal for being received when first Remote Radio Unit is small When the signal of first threshold, and the car-mounted terminal of second Remote Radio Unit reception is more than second threshold, if Set the data that second business processing device transmits first Remote Radio Unit and second Remote Radio Unit Merge transmission.
The embodiment of the invention discloses another business processing device, which is applied to railway vehicle-ground wireless communication system Baseband processing unit in LTE Baseband Processing Unit, shown in Figure 11, which includes：
First data transceiving unit 200, the first Remote Radio Unit for receiving the LTE Baseband Processing Unit connection are sent Data, adjacent baseband processing unit LTE Baseband Processing Unit connection the second Remote Radio Unit send data；Receive the One data processing unit send that treated Data Concurrent give the LTE Baseband Processing Unit connection the first Remote Radio Unit, Second Remote Radio Unit of the LTE Baseband Processing Unit connection of adjacent baseband processing unit；It receives in adjacent baseband processing unit The first data processing unit of LTE Baseband Processing Unit send that treated that Data Concurrent gives the remote radio being connect with itself Unit；Wherein, there are data exchanges between the LTE Baseband Processing Unit and the LTE Baseband Processing Unit of the adjacent baseband processing unit Link；
First data processing unit 210, data and described second for being sent to first Remote Radio Unit are penetrated The data that frequency extension unit is sent carry out physical layer or data link layer merging treatment, and to coming from the LTE Baseband Processing Unit institute Master control processing board send data carry out downlink transmission processing.
The embodiment of the invention also discloses another business processing device, which is applied to railway vehicle-ground wireless communication system Master control processing board in the baseband processing unit of system, shown in Figure 12, which includes：
Second data transceiving unit 300, for receiving the baseband processing unit connection where the master control processing board Second by LTE Baseband Processing Unit treated data, the connection of adjacent baseband processing unit that one Remote Radio Unit is sent is penetrated Frequency extension unit send by LTE Baseband Processing Unit treated data；Receiving the transmission of the second data processing unit, treated Data Concurrent is given the LTE Baseband Processing Unit being connect with first Remote Radio Unit, is connect with second Remote Radio Unit Adjacent baseband processing unit in master control processing board；Wherein, the master control processing board and the adjacent Base-Band Processing list There are data interchange links between the master control processing board of member；
Second data processing unit 310 passes through for what is sent to first Remote Radio Unit at LTE Baseband Processing Unit Data after reason and second Remote Radio Unit send by LTE Baseband Processing Unit, treated that data carry out data link Layer merging treatment, and downlink transmission processing is carried out to business datum.
Specifically, the specific works content of each unit in the embodiment of above-mentioned each business processing device, refers to The content of above method embodiment, details are not described herein again.
It should be strongly noted that the unit 310 of 210 and second data processing of above-mentioned first data processing unit is to business When data are scheduled processing, to reach power system capacity maximization while avoiding resource collision in accordance with preceding method.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest range caused.

Claims (14)

1. a kind of method for processing business, which is characterized in that be applied to railway vehicle-ground wireless communication system, the railway car-ground radio All cells physical district ID having the same of communication system；The method includes：
When car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to the position and movement of the car-mounted terminal Direction confirms the second Remote Radio Unit that the car-mounted terminal will enter；
If first Remote Radio Unit is separately connected different business processing devices from second Remote Radio Unit, Be then the first business processing device of first Remote Radio Unit connection connected with second Remote Radio Unit the Two business processing devices establish data interchange links, and delete redundant data present in first business processing device and exchange Link；Wherein, the different business processing device include different baseband processing units or same baseband processing unit not Same LTE Baseband Processing Unit；
The user's context of the car-mounted terminal is established in second business processing device, and is arranged at first business The data that reason device transmits first Remote Radio Unit and second Remote Radio Unit merge transmission；
When the signal for the car-mounted terminal that first Remote Radio Unit receives is less than first threshold, and described second penetrates When the signal for the car-mounted terminal that frequency extension unit receives is more than second threshold, second business processing device is set to institute The data for stating the first Remote Radio Unit and second Remote Radio Unit transmission merge transmission.
2. according to the method described in claim 1, it is characterized in that, second business processing device draws first radio frequency When remote unit and the data of second Remote Radio Unit transmission merge transmission, this method further includes：
When the car-mounted terminal signal that first Remote Radio Unit receives persistently is deteriorated and is less than third threshold value, delete Except the data interchange links established between first business processing device and second business processing device, and delete described The user's context of the car-mounted terminal in one business processing device.
3. according to the method described in claim 1, it is characterized in that, described is the first of first Remote Radio Unit connection The second business processing device that business processing device is connected with second Remote Radio Unit establishes data interchange links, packet It includes：
For first Remote Radio Unit connection the first LTE Baseband Processing Unit connected with second Remote Radio Unit the Two LTE Baseband Processing Unit establish data interchange links；
Setting first business processing device is to first Remote Radio Unit and second Remote Radio Unit The data of transmission merge transmission, including：
It is arranged what first LTE Baseband Processing Unit transmitted first Remote Radio Unit and second Remote Radio Unit Data carry out physical layer or data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second Remote Radio Unit The data of transmission merge transmission, including：
It is arranged what second LTE Baseband Processing Unit transmitted first Remote Radio Unit and second Remote Radio Unit Data carry out physical layer or data link layer merging treatment and transmission process.
4. according to the method described in claim 1, it is characterized in that, described is the first of first Remote Radio Unit connection The second business processing device that business processing device is connected with second Remote Radio Unit establishes data interchange links, packet It includes：
The first master control processing board and described second for the first baseband processing unit of first Remote Radio Unit connection is penetrated Second master control processing board of the second baseband processing unit of frequency extension unit connection establishes data interchange links；
Wherein, setting first business processing device is to first Remote Radio Unit and second remote radio The data of unit transmission merge transmission, including：
It is arranged what the first master control processing board transmitted first Remote Radio Unit and second Remote Radio Unit Data carry out data link layer merging treatment and transmission process；
Setting second business processing device is to first Remote Radio Unit and second Remote Radio Unit The data of transmission merge transmission, including：
It is arranged what the second master control processing board transmitted first Remote Radio Unit and second Remote Radio Unit Data carry out data link layer merging treatment and transmission process.
5. according to the method described in claim 1, it is characterized in that, second business processing device is arranged to described first After Remote Radio Unit and the data of second Remote Radio Unit transmission merge transmission, this method further includes：
According to the position and movement direction of the car-mounted terminal, the third remote radio list that the car-mounted terminal will enter is confirmed Member；
If the third Remote Radio Unit is separately connected different business processing devices from second Remote Radio Unit, Be then the third business processing device of third Remote Radio Unit connection connected with second Remote Radio Unit the Two business processing devices establish data interchange links, and establish the car-mounted terminal in the third business processing device User's context；Wherein, the different business processing device includes different baseband processing units or same Base-Band Processing list The different LTE Baseband Processing Unit of member；
When the signal for the car-mounted terminal that second Remote Radio Unit receives is less than first threshold, and the third is penetrated When the signal that frequency extension unit receives the car-mounted terminal is more than second threshold, the third business processing device is set to described Second Remote Radio Unit and the data of third Remote Radio Unit transmission merge transmission；
If there are the data interchange links established between first business processing device and second business processing device, It deletes existing data interchange links and deletes the user's context of the car-mounted terminal in first business processing device.
6. a kind of method for processing business, which is characterized in that be applied in the baseband processing unit of railway vehicle-ground wireless communication system LTE Baseband Processing Unit, this method includes：
Receive the data of the first Remote Radio Unit transmission of the LTE Baseband Processing Unit connection, the base of adjacent baseband processing unit The data that second Remote Radio Unit of tape handling plate connection is sent；Wherein, the LTE Baseband Processing Unit and the adjacent base band There are data interchange links between the LTE Baseband Processing Unit of processing unit；
The data that the data and second Remote Radio Unit sent to first Remote Radio Unit are sent carry out physics Layer or data link layer merging treatment；The data that merging treatment is obtained carry out uplink.
7. according to the method described in claim 6, it is characterized in that, this method further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to second radio frequency The data of extension unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and by institute It states and is sent to the data of second Remote Radio Unit and is sent to the LTE Baseband Processing Unit of second Remote Radio Unit connection, Make the LTE Baseband Processing Unit that second Remote Radio Unit connects by the data for being sent to second Remote Radio Unit It is sent to second Remote Radio Unit.
8. according to the method described in claim 6, it is characterized in that, this method further includes：
Determine by the LTE Baseband Processing Unit control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the Remote Radio Unit of different user Cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cell of user is adjacent It is all there are the Remote Radio Unit cell of different user distribute non-overlapping copies running time-frequency resource.
9. a kind of method for processing business, which is characterized in that be applied in the baseband processing unit of railway vehicle-ground wireless communication system Master control processing board, this method includes：
Receive the process base band that the first Remote Radio Unit of the baseband processing unit connection where the master control processing board is sent Processing board treated data, and receive the process that the second Remote Radio Unit of adjacent baseband processing unit connection is sent LTE Baseband Processing Unit treated data；Wherein, the master control processing of the master control processing board and the adjacent baseband processing unit There are data interchange links between plate；
The data that the data and second Remote Radio Unit sent to first Remote Radio Unit are sent carry out data Link layer merging treatment；
Data after merging treatment are subjected to uplink.
10. according to the method described in claim 9, it is characterized in that, this method further includes：
Receive downlink data；
The downlink data is parsed, the data for being sent to first Remote Radio Unit are obtained and is sent to second radio frequency The data of extension unit；
The data for being sent to first Remote Radio Unit are sent to first Remote Radio Unit, and by institute It states and is sent to the data of second Remote Radio Unit and is sent to the master control processing board for managing second Remote Radio Unit, Make the master control processing board of management second Remote Radio Unit by the data for being sent to second Remote Radio Unit It is sent to second Remote Radio Unit.
11. according to the method described in claim 9, it is characterized in that, this method further includes：
Determine by the master control processing board control each there are the Remote Radio Unit cells of user；
To each there are the Remote Radio Unit cell of user, execution respectively operates below：
It determines and described there are adjacent all of the Remote Radio Unit cell of user, there are the Remote Radio Unit of different user Cell；
There are the Remote Radio Unit cells of user to be described, and with described there are the Remote Radio Unit cell of user is adjacent It is described there are the Remote Radio Unit cell of different user distribute non-overlapping copies running time-frequency resource.
12. a kind of business processing device, which is characterized in that be applied to railway vehicle-ground wireless communication system, railcar ground nothing All cells physical district ID having the same of line communication system；Described device includes：
Location management unit is used for when car-mounted terminal is in the coverage area of the first Remote Radio Unit, according to the vehicle The position and movement direction of mounted terminal confirms the second Remote Radio Unit that the car-mounted terminal will enter；
Data link management unit is separately connected for working as first Remote Radio Unit with second Remote Radio Unit When different business processing device, the first business processing device and described second for first Remote Radio Unit connection is penetrated Second business processing device of frequency extension unit connection establishes data interchange links, and deletes in first business processing device Existing redundant data link exchange；Wherein, the different business processing device includes different baseband processing unit or same The different LTE Baseband Processing Unit of one baseband processing unit；
First setting unit, the user's context for establishing the car-mounted terminal in second business processing device, and The number that first business processing device transmits first Remote Radio Unit and second Remote Radio Unit is set It is transmitted according to merging；
The signal of second setting unit, the car-mounted terminal for being received when first Remote Radio Unit is less than the first threshold Value, and when the signal of the car-mounted terminal that receives of second Remote Radio Unit is more than second threshold, setting described the The data that two business processing devices transmit first Remote Radio Unit and second Remote Radio Unit merge Transmission.
13. a kind of business processing device, which is characterized in that be applied in the baseband processing unit of railway vehicle-ground wireless communication system LTE Baseband Processing Unit, which includes：
First data transceiving unit, the data of the first Remote Radio Unit transmission for receiving the LTE Baseband Processing Unit connection, The data that second Remote Radio Unit of the LTE Baseband Processing Unit connection of adjacent baseband processing unit is sent；It receives at the first data Reason unit sends that treated Data Concurrent gives the first Remote Radio Unit, the adjacent base of the LTE Baseband Processing Unit connection Second Remote Radio Unit of the LTE Baseband Processing Unit connection of tape handling unit；It receives at the base band in adjacent baseband processing unit The first data processing unit for managing plate sends that treated that Data Concurrent gives the Remote Radio Unit being connect with itself；Its In, there are data interchange links between the LTE Baseband Processing Unit and the LTE Baseband Processing Unit of the adjacent baseband processing unit；
First data processing unit, the data for being sent to first Remote Radio Unit and the second remote radio list The data that member is sent carry out physical layer or data link layer merging treatment, and to from the master control where the LTE Baseband Processing Unit The data that processing board is sent carry out downlink transmission processing.
14. a kind of business processing device, which is characterized in that be applied in the baseband processing unit of railway vehicle-ground wireless communication system Master control processing board, which includes：
Second data transceiving unit, the first radio frequency connected for the baseband processing unit where receiving the master control processing board are drawn The second remote radio list by LTE Baseband Processing Unit treated data, the connection of adjacent baseband processing unit that remote unit is sent Member send by LTE Baseband Processing Unit treated data；It receives the second data processing unit and sends treated Data Concurrent Give the LTE Baseband Processing Unit being connect with first Remote Radio Unit, connect with second Remote Radio Unit it is adjacent LTE Baseband Processing Unit in baseband processing unit；Wherein, the master control of the master control processing board and the adjacent baseband processing unit There are data interchange links between processing board；
Second data processing unit, for first Remote Radio Unit sends by LTE Baseband Processing Unit, that treated is several It is carried out at data link layer merging by LTE Baseband Processing Unit treated data according to what second Remote Radio Unit was sent Reason, and downlink transmission processing is carried out to business datum.
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