CN100396139C - Method and system for back-up of cell baseband data channel - Google Patents
Method and system for back-up of cell baseband data channel Download PDFInfo
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Abstract
The present invention relates to a method and a system for the backup of a base band data channel in a cell. The present invention has the core that base band single plates with high-speed interface processing function in a distributed type base station are connected in order to form a cyclic structure, and backup operation is carried out to the base band data channels in the cells under the base station based on the cyclic structure. By the cyclic structure of the present invention, when the base band resource of one of the single plates can allocate two base band data channels for one of the cells, the backup of the base band data channel can be realized, namely, when malfunction occurred on a main base band data channel, the transmission can be switched to the standby base band data channel. Thereby, the reliability of the base band data transmission can be ensured, and furthermore, the system reliability and the transmission freedom degree can be enhanced.
Description
Technical field
The present invention relates to the communications field, relate in particular to the backup of base band data passage.
Background technology
In traditional communication system base station, in the base station as the WCDMA system, the interface processing unit is positioned at different veneers with baseband processing unit, and when the transmission base band data, what adopt between each veneer is low-speed interface.Star-like connected mode by as shown in Figure 1 between the base band veneer connects base band data transmission interface (being low-speed interface), and every like this roadbed band data can directly be transmitted between two veneers, and reliability is higher.
Along with development of Communication Technique, distributed base station presents with its significant advantage, passes through distributed base station, can share base-band resource between sub-district that a plurality of RRU (RF remote unit) constitute or base station, thereby can realize More Soft Handoff, improve utilization rate of equipment and installations, improve network index.Therefore the application of distributed base station more and more widely.In distributed base station, interface processing unit and baseband processing unit are positioned on the veneer, as present BBU (Baseband Unit, baseband processing unit) veneer.Every veneer all has the interface processing capacity, and can the high-speed transfer base band data.If distributed base station also adopts traditional star-like connected mode to connect each veneer, can cause the line between each veneer too many (because on each BBU the interface processing capacity is arranged all, star-like connection means that all BBU connect in twos), thereby make system complex, cost rises greatly, safeguards also inconvenient.Obviously this star-like connected mode is not suitable for this distributed base station.
The prior art relevant with the present invention is that the chain connected mode by as shown in Figure 2 couples together each BBU veneer in the distributed base station.
Adopt this method of attachment of prior art, the line between each veneer is reduced, cost reduces, but there is following defective in it:
Base band data transmission between two veneers can be passed through a plurality of interfaces, when wherein any one interface breaks down, all can cause professional interruption, thereby the reliability of system is descended greatly.And the chain connected mode that adopts prior art can't realize the backup of base band data passage when each BBU unit is connected.
Summary of the invention
The purpose of this invention is to provide a kind of method and system to back-up of cell baseband data channel, by the present invention, when the base-band resource of veneer can satisfy for two base band data passages of certain cell allocation, then can realize the backup of base band data passage, thereby can guarantee the reliability of base band data transmission, and then can improve the reliability and the transmission degree of freedom of system.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of method to back-up of cell baseband data channel, it comprises:
A, each base band veneer that is provided with the high-speed interface processing capacity in the distributed base station is connected in turn, constitutes circulus;
B, back up based on the base band data passage of described circulus to each sub-district under the base station.
Wherein, described interface processing capacity realizes by on-site programmable gate array FPGA.
Wherein, described step B specifically comprises:
B1, the bandwidth resources supported according to each base band veneer in the described circulus are distributed the base band data passage of each sub-district under the described base station;
B2, according to the base band data passage time division multiplexing of each sub-district under the described base station principle to the high-speed interface of base band veneer, dispose the route of each cell baseband data channel under the described base station;
B3, when be under the described base station each cell configuration during two base band data passages, the base band veneer is used the base band data of the described sub-district of base band data channel transfer as the master based on the strong base band data passage of the Route Selection signal of described configuration, when described master is broken down with the base band data passage, then pass through the base band data of another described sub-district of base band data channel transfer.
Wherein, described step B1 specifically comprises:
B11, judge whether the described base band data port number that need support the base station surpasses the base band data port number that described high-speed interface can carry, if do not surpass, execution in step B12 then; Otherwise, execution in step B13;
B12, be two base band data passages of each cell configuration under the described base station based on described circulus;
B13, to the corresponding base band data passage of each cell allocation under the described base station, described principle to the corresponding base band data passage of each cell allocation under the described base station is: inborn ability is equipped with a part base band data passage when the base band data channel resource of the high-speed interface of described base band veneer satisfies all base band data passages of some sub-districts in each sub-district under the described base station, and when existing cell allocation backup base band data passage, but when the base band data channel can't be distributed in follow-up sub-district, then discharge the backup base band data passage of existing sub-district.
Wherein, when base band veneer during as the starting point of a base band data passage, described step B2 specifically comprises:
When the base band data passage that can satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation on certain passage that data with the some sub-districts in each sub-district under the described base station send to two corresponding on described base band veneer high-speed interfaces respectively;
Or,
When the base band data passage that can not satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation on certain passage that data with some sub-districts in each sub-district under the described base station send to high-speed interface corresponding on the described base band veneer respectively, the data of certain another sub-district in each sub-district under the described base station are sent to the corresponding relation on certain passage of another high-speed interface on the described base band veneer.
Wherein, when base band veneer during as the terminal point of a base band data passage, described step B2 specifically comprises:
When the base band data passage that can satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation that certain passage with the data of some sub-districts in each sub-district under the described base station two corresponding high-speed interfaces from the described base band veneer receives respectively;
Or,
When the base band data passage that can not satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation that certain passage with the data of some sub-districts in each sub-district under the described base station corresponding high-speed interface from the described base band veneer receives respectively, the corresponding relation that certain passage of the data of certain another sub-district in each sub-district under the described base station another high-speed interface from the described base band veneer is received.
Wherein, when base band veneer during as the intermediate point of a base band data passage, described step B2 specifically comprises:
The commutative relation of the exchanges data that configuration will receive from the high-speed interface of described base band veneer to the corresponding downstream high-speed interface;
Or,
The channel number of arranging on the high-speed interface of high-speed interface that described base band veneer receives data and transmission data is identical.
Wherein, one or more Base-Band Processing subelements that are used to strengthen the processing capacity of base band data are set in described base band veneer.
The invention provides a kind of system to back-up of cell baseband data channel, comprise a plurality of base band veneers, in described base band veneer, be provided with high-speed interface, successively each base band veneer is connected by described high-speed interface, constitute circulus, be used to the base band data passage of each sub-district under the base station that backup is provided.
Wherein, be provided with one or more Base-Band Processing subelements in the described base band veneer, be used to strengthen the processing capacity of base band data.
Wherein, between each base band veneer of described circulus, be provided with two base band data passages of sub-district, during operate as normal, select the strong base band data passage of signal as main base band data with the described sub-district of base band data channel transfer, when described master is broken down with the base band data passage, then pass through the base band data of another described sub-district of base band data channel transfer.
As seen from the above technical solution provided by the invention, the present invention is connected in turn each base band veneer that is provided with the high-speed interface processing capacity in the distributed base station, constitutes circulus; Back up based on the base band data passage of described circulus each sub-district under the base station.By circulus of the present invention, when the base-band resource of veneer can satisfy for two base band data passages of certain cell allocation, can realize the backup of base band data passage, thereby can guarantee the reliability of base band data transmission, and then can improve the reliability and the transmission degree of freedom of system.
Description of drawings
Fig. 1 is the schematic diagram of the star-like connected mode between the base band veneer in the traditional base station;
Fig. 2 is the schematic diagram of the chain connected mode between the BBU veneer of distributed base station in the prior art;
Fig. 3 is the schematic diagram of the ring-like connected mode between each BBU veneer of distributed base station among first embodiment provided by the invention;
Fig. 4 is the schematic diagram of the ring-like connected mode between each BBU veneer of distributed base station of second embodiment provided by the invention;
Fig. 5 is the flow chart of the 3rd embodiment provided by the invention;
Fig. 6 be among the 3rd embodiment provided by the invention sub-district base band data passway by under the Hot Spare situation, the data flow schematic diagram at starting point place;
Fig. 7 be among the 3rd embodiment provided by the invention sub-district base band data passway by under the Hot Spare situation, the data flow schematic diagram of destination county;
Fig. 8 be among the 3rd embodiment provided by the invention sub-district base band data passway by under the Hot Spare situation, the data flow schematic diagram at intermediate point place;
Fig. 9 be among the 3rd embodiment provided by the invention sub-district base band data passway by under can not backup instances, the data flow schematic diagram at starting point place;
Figure 10 be among the 3rd embodiment provided by the invention sub-district base band data passway by under can not backup instances, the data flow schematic diagram of destination county.
Embodiment
The invention provides a kind of method and system that transmits the cell baseband data, its core is: each base band veneer that is provided with the high-speed interface processing capacity in the distributed base station is connected in turn, constitutes circulus; Back up based on the base band data passage of described circulus each sub-district under the base station.
Provide first embodiment at system of the present invention, it as shown in Figure 3, in distributed base station, adopt ring-like method of attachment that each base band veneer is connected into circulus, and, in each base band veneer, the high speed processing interface is set in order to be two base band data passages of more cell allocation as much as possible.During operate as normal, system selects the good base band data passage of signal as main base band data passage, when described main base band data passage breaks down, by the corresponding base band data of another base band data channel transfer.
Provide second embodiment at system of the present invention, its as shown in Figure 4, the difference of itself and first embodiment is:
Star-like several Base-Band Processing subelements that connected under each base band veneer.These Base-Band Processing subelements have only the base band data processing capacity, and share the interface processing capacity of his father BBU unit.This networking mode can be used for the dilatation of later stage distributed base station baseband portion.
First embodiment provided by the invention, as shown in Figure 5, it comprises:
Step 1 is connected in turn each base band veneer that is provided with the high-speed interface processing capacity in the distributed base station, constitutes circulus.
Described interface processing capacity can realize by on-site programmable gate array FPGA.This is because of the maturation gradually along with the FGPA technology, FPGA can support the high-speed interface of a plurality of 2.5G, and each high-speed interface that belongs to same FPGA use that can walk abreast, this makes that the data bandwidth between each veneer is relatively more sufficient, so that when being suitable for the base band data of all sub-districts of transmission, also have remaining bandwidth to be used for realizing the backup of passage.
Described interface processing capacity also can realize as the Memory Controller Hub that CPU carries by adopting non-FPGA Memory Controller Hub.It also can provide high-speed interface, so that support enough bandwidth resources.
In distributed base station, adopt ring-like method of attachment that each base band veneer is connected into as shown in Figure 3 circulus after, can under the enough situation of bandwidth, be that a base-band data stream disposes active and standby two routes.Every base-band data stream all can be transmitted by two different passages like this, as need both adopting route BBU0-＞BBU2 when BBU0 is transferred to BBU2 when data, also can adopt route BBU0-＞BBU1-＞BBU3-＞BBU2.When each passage on two routes all is communicated with, target single board can select one road signal preferably data handle, and if fault, chain rupture appears in a route wherein, data flow can also be transmitted by another route, is unlikely to occur service disconnection.
Through after step 1 sets up circulus, then need the bandwidth resources supported according to each BBU unit in the described circulus that the base band data passage of sub-district is distributed.In a minute timing, if realize complete Hot Spare, promptly all cell baseband passages can both dispose active and standby two routes, must satisfy:
The sub-district port number that sub-district port number＜=high-speed interface that the system specification need be supported can carry
If do not satisfy above-mentioned condition, then software need reasonably distribute the sub-district channel resource of high-speed interface and manage, and makes to support more sub-district as much as possible and realize Hot Spare as far as possible.The specific implementation process is as follows:
In this case, the cell baseband data channel can back up fully, and active and standby part of base band data passage of each cell baseband data channel just in time constitutes a complete ring, and each high-speed interface bandwidth consumption situation is all identical.
1) for a sub-district, have only all base band data passages of this sub-district can back up inborn ability and be equipped with a part base band data passage, if promptly there are two data feedback channels the sub-district, but remaining bandwidth can only satisfy the backup of a passage, then two passages do not back up;
2) if existing cell allocation backup base band data passage, but the base band data channel can't be distributed in follow-up sub-district, then discharges the backup base band data passage of existing sub-district.
The bandwidth resources of supporting according to the BBU unit to the base band data channel allocation of sub-district intact after, and then execution in step 5, promptly dispose the route of described Data Base tape channel.
Share the high-speed interface bandwidth in order to make various base band datas, and can select route efficiently, can adopt time-multiplexed method, with a plurality of sub-districts time division multiplexing to high-speed interface, be that different cell datas transmits on different time slots,, the data choice relation disposed to FPGA as long as when setting up route, FPGA just can select the data of required sub-district at each time slot afterwards, and carries out circuit switching.The specific implementation process describes in two kinds of situation.
First kind of situation is the situation when the base band data passage of all sub-districts under the base station all can dispose two, and the specific implementation process is as follows:
When the base band veneer during as the starting point of a base band data passage (for up, the base band veneer at interface processing unit place is the starting point of uplink baseband data, for descending, the base band veneer at place, downlink processing unit is the starting point of downgoing baseband data.), dispose the corresponding relation on certain passage (being time slot) that data with described sub-district send to two corresponding on described base band veneer high-speed interfaces respectively.
As shown in Figure 6, suppose that the base band veneer is the data channel starting point of sub-district 0..m, Port A (port A) and Port B (port A) are two high-speed interfaces of base band veneer, are used for other BBU interconnected.According to adopting time-multiplexed method, with the principle of a plurality of sub-districts time division multiplexing to high-speed interface, when the high-speed interface bandwidth is enough, the passage of Cell j (sub-district j) is dispensed on the i passage of high-speed interface and transmits, and there are active and standby part of two base band data passages, then need the base band data of Cell j to be sent to the corresponding relation of the passage i of Port A and Port B for respectively the FPGA interface configuration.
When the base band veneer during as the terminal point of a base band data passage (for up, the base band veneer at up processing unit place is the starting point of uplink baseband data, for descending, the base band veneer at interface processing unit place is the starting point of downgoing baseband data.), dispose the corresponding relation that certain passage (being time slot) with the data of described sub-district two corresponding high-speed interfaces from the described base band veneer receives respectively.
As shown in Figure 7, suppose that the base band veneer is the data channel terminal point of sub-district 0..m, Port A and Port B are two high-speed interfaces of base band veneer, are used for other BBU interconnected.According to adopting time-multiplexed method, with the principle of a plurality of sub-districts time division multiplexing to high-speed interface, when the high-speed interface bandwidth is enough, the passage of Cell j is assigned on the i passage of high-speed interface and transmits, and there are active and standby part two base band data passages, the corresponding relation that then needs to give respectively the FPGA interface configuration that Cell j data are received from the passage i of Port A and Port B.
When base band veneer during as the intermediate point of a base band data passage, the commutative relation of the exchanges data that configuration will receive from the high-speed interface of base band veneer to the corresponding downstream high-speed interface.
When the intermediate point of base band veneer as a data channel, then veneer only plays the data forwarding function.As shown in Figure 8, suppose the intermediate point of base band veneer as data channel, the exchanges data of Port A need be arrived Port B, as, with the exchanges data of the passage i of Port A passage k to Port B, the exchanges data of the passage j of Port A to the passage h of Port B, is then needed to be this commutative relation of FPGA interface configuration.
Under this complete backup instances, the channel number of the channel number of Port A and Port B can be decided to be approximately identically, then Port A does not need software arrangements to the commutative relation of Port B.
Second kind of situation is the situation when high-speed interface bandwidth deficiency causes that each sub-district can not be backed up under the described base station, and the specific implementation process is as follows:
When base band veneer during as the starting point of a base band data passage, dispose the corresponding relation on certain passage that data with a certain sub-district send to high-speed interface corresponding on the described base band veneer respectively, the data of another sub-district are sent to the corresponding relation on certain passage of another high-speed interface on the described base band veneer.
As shown in Figure 9, when high-speed interface bandwidth deficiency, and when the data channel of Cell j and Cell k can not back up, if being assigned to respectively on the i passage of Port A and Port B, the data channel of Cell j and Cell k transmits, then need respectively to give the FPGA interface configuration that the data of Cell j are sent to the passage i of Port A and the data of Cell k are sent to the corresponding relation of the passage i of Port B.
When base band veneer during as the terminal point of a base band data passage, the corresponding relation that receives of certain passage of the data that configuration will described a certain sub-district high-speed interface of correspondence from the described base band veneer respectively, the corresponding relation that certain passage of the data of another sub-district another high-speed interface from the described base band veneer is received.
As shown in figure 10, suppose the data channel terminal point that this base band veneer is sub-district 0..m, Port A and Port B are two high-speed interfaces of base band veneer, are used for other BBU interconnected.According to adopting time-multiplexed method, with the principle of a plurality of sub-districts time division multiplexing to high-speed interface, when the high-speed interface bandwidth is not enough, the data channel of Cell j and Cell k can not back up, if being assigned to respectively on the i passage of Port A and Port B, the data channel of Cell j and Cell k transmits, then need respectively to give the FPGA interface configuration with the data of Cell j from the passage i of Port A receive and the data of Cell k from the passage i reception of Port B.
When base band veneer during as the intermediate point of a base band data passage, the commutative relation of the exchanges data that configuration will receive from the high-speed interface of base band veneer to the corresponding downstream high-speed interface.Identical with above-mentioned associated description when the cell baseband data channel can Hot Spare, be not described in detail here.
After the base band data channel arrangement of sub-district finishes, based on the base band data of the described sub-district of route transmission of described configuration.Concrete transmission course is as follows:
Among the 3rd embodiment provided by the invention, one or more Base-Band Processing subelements that are used to strengthen the base band data processing capacity can also be set in described base band veneer.For example as shown in Figure 4, adopt ring-like connected mode that each BBU unit is connected, but star-like again several Base-Band Processing subelements that connected under each BBU.These Base-Band Processing subelements have only the base band data processing capacity, and share the interface processing capacity of his father BBU unit.This networking mode can be used for the dilatation of later stage distributed base station baseband portion.
The base band veneer that the interface processing capacity is arranged in the foregoing description is that the BBU unit with distributed base station is that example describes, and other is any to have the base band veneer of interface processing capacity all to be suitable for.
The specific embodiments that is provided by the invention described above as can be seen, by the present invention, when the base-band resource of base band veneer can satisfy for two base band data passages of certain cell allocation, then carry out Hot Spare for this cell baseband data channel, thereby can guarantee the reliability of base band data transmission, and then can improve the reliability and the transmission degree of freedom of system.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (11)
1. the method to back-up of cell baseband data channel is characterized in that, comprising:
A, each base band veneer that is provided with the high-speed interface processing capacity in the distributed base station is connected in turn, constitutes circulus;
B, back up based on the base band data passage of described circulus to each sub-district under the base station.
2. method according to claim 1 is characterized in that, described interface processing capacity realizes by on-site programmable gate array FPGA.
3. method according to claim 1 is characterized in that, described step B specifically comprises:
B1, the bandwidth resources supported according to each base band veneer in the described circulus are distributed the base band data passage of each sub-district under the described base station;
B2, according to the base band data passage time division multiplexing of each sub-district under the described base station principle to the high-speed interface of base band veneer, dispose the route of each cell baseband data channel under the described base station;
B3, when be under the described base station each cell configuration during two base band data passages, the base band veneer is used the base band data of the described sub-district of base band data channel transfer as the master based on the strong base band data passage of the Route Selection signal of described configuration, when described master is broken down with the base band data passage, then pass through the base band data of another described sub-district of base band data channel transfer.
4. method according to claim 3 is characterized in that, described step B1 specifically comprises:
B11, judge whether the described base band data port number that need support the base station surpasses the base band data port number that described high-speed interface can carry, if do not surpass, execution in step B12 then; Otherwise, execution in step B13;
B12, be two base band data passages of each cell configuration under the described base station based on described circulus;
B13, to the corresponding base band data passage of each cell allocation under the described base station, described principle to the corresponding base band data passage of each cell allocation under the described base station is: inborn ability is equipped with a part base band data passage when the base band data channel resource of the high-speed interface of described base band veneer satisfies all base band data passages of some sub-districts in each sub-district under the described base station, and when existing cell allocation backup base band data passage, but when the base band data channel can't be distributed in follow-up sub-district, then discharge the backup base band data passage of existing sub-district.
5. method according to claim 3 is characterized in that, when base band veneer during as the starting point of a base band data passage, described step B2 specifically comprises:
When the base band data passage that can satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation on certain passage that data with the some sub-districts in each sub-district under the described base station send to two corresponding on described base band veneer high-speed interfaces respectively;
Or,
When the base band data passage that can not satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation on certain passage that data with some sub-districts in each sub-district under the described base station send to high-speed interface corresponding on the described base band veneer respectively, the data of certain another sub-district in each sub-district under the described base station are sent to the corresponding relation on certain passage of another high-speed interface on the described base band veneer.
6. method according to claim 3 is characterized in that, when base band veneer during as the terminal point of a base band data passage, described step B2 specifically comprises:
When the base band data passage that can satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation that certain passage with the data of some sub-districts in each sub-district under the described base station two corresponding high-speed interfaces from the described base band veneer receives respectively;
Or,
When the base band data passage that can not satisfy each sub-district under the described base station when the high-speed interface bandwidth can back up, dispose the corresponding relation that certain passage with the data of some sub-districts in each sub-district under the described base station corresponding high-speed interface from the described base band veneer receives respectively, the corresponding relation that certain passage of the data of certain another sub-district in each sub-district under the described base station another high-speed interface from the described base band veneer is received.
7. method according to claim 3 is characterized in that, when base band veneer during as the intermediate point of a base band data passage, described step B2 specifically comprises:
The commutative relation of the exchanges data that configuration will receive from the high-speed interface of described base band veneer to the corresponding downstream high-speed interface;
Or,
Arrange described base band veneer and receive the high-speed interface of data, identical with channel number on the high-speed interface that sends data.
8. method according to claim 1 is characterized in that:
One or more Base-Band Processing subelements that are used to strengthen the processing capacity of base band data are set in described base band veneer.
9. the system to back-up of cell baseband data channel comprises a plurality of base band veneers, it is characterized in that:
In described base band veneer, be provided with high-speed interface, successively each base band veneer connected, constitute circulus, be used to the base band data passage of each sub-district under the base station that backup is provided by described high-speed interface.
10. system according to claim 9 is characterized in that:
Be provided with one or more Base-Band Processing subelements in the described base band veneer, be used to strengthen the processing capacity of base band data.
11., it is characterized in that according to claim 9 or 10 described systems:
Between each base band veneer of described circulus, be provided with two base band data passages of sub-district, during operate as normal, select the strong base band data passage of signal as main base band data with the described sub-district of base band data channel transfer, when described master is broken down with the base band data passage, then pass through the base band data of another described sub-district of base band data channel transfer.
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| CN109348493B (en) * | 2018-10-24 | 2022-02-11 | 广州天电科技有限公司 | High-reliability wireless communication system link backup device and control method thereof |
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|---|---|---|---|---|
| CN1154195A (en) * | 1994-05-27 | 1997-07-09 | 柯廷技术大学 | Cellular communications network |
| US20040165649A1 (en) * | 2003-02-25 | 2004-08-26 | Yoshihisa Takahashi | Communication device |
| CN1652520A (en) * | 2004-02-02 | 2005-08-10 | 华为技术有限公司 | Distributed substation network combining method |
| CN1661941A (en) * | 2004-02-23 | 2005-08-31 | 华为技术有限公司 | Distributed base stations and data interactive method |
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