CN101437321B - Method for signaling cascade for radio frequency zooming unit - Google Patents
Method for signaling cascade for radio frequency zooming unit Download PDFInfo
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- CN101437321B CN101437321B CN2007101879779A CN200710187977A CN101437321B CN 101437321 B CN101437321 B CN 101437321B CN 2007101879779 A CN2007101879779 A CN 2007101879779A CN 200710187977 A CN200710187977 A CN 200710187977A CN 101437321 B CN101437321 B CN 101437321B
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- 238000006243 chemical reaction Methods 0.000 claims description 15
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Abstract
The invention provides a method for RRU signaling cascade, wherein a BBU is cascaded with a plurality of RRUs, downlink is that a signaling reaches an RRU from a BBU or reaches the next RRU from the RRU, and uplink is that a signaling reaches the BBU from the RRU or reaches the previous RRU from the RRU. The method is characterized by comprising the following steps: (a) a signaling between the BBU and the RRU is framed according to a specified format; (b) a downlink signaling is extracted and transmitted, in which the RRU extracts the signaling from a data frame according to the specified frame format after receiving a downlink data frame; and the RRU transmits the signaling correlated to the RRU cascade position after processing the signaling, and other signalings are directly transmitted; and (c) an uplink signaling is inserted and transmitted, in which inserting and transmitting of the signaling are performed by adopting a time sharing multiplex method when the uplink signaling is in down link; when the RRU belongs to the frame of the level, the signaling is sent; and when the RRU does not belong to the frame of the level, a signaling sent by the next RRU is transmitted.
Description
Technical field
The present invention relates to the method for a kind of base station (Node B) Remote Radio Unit (RRU) signaling cascade transmission, refer more particularly to the method for the NODE B signaling cascade for radio frequency zooming unit transmission in TD-SCDMA (TD SDMA) and WCDMA (Wideband Code Division Multiple Access (WCDMA)) field.
Background technology
TD-SCDMA or WCDMA system are made up of base station, radio network controller (RNC), core net (CN) and portable terminal (UE) four parts.Along with the development of wireless radio-frequency, the developing trend of base station is zoomed out middle radio frequency part by optical fiber in base band signal process is separated with middle radio frequency processing.In the base station, main control part and Base-Band Processing partly are called BBU (Base Band Unit, baseband pool unit), and Digital IF Processing and radio frequency part are called RRU (Radio Remote Unit, Remote Radio Unit).
Traditional way is the light mouth control of a BBU and manages a RRU at present, and the limitation of this mode is a lot, is unfavorable for flexible networking on the one hand, and the increase in demand to the place has also increased cost to operator in addition.
And under the situation of cascade, a plurality of RRU can be managed and control to the light mouth of a BBU, and the mode cascade of several RRU by chain together.By the cascade system of this RRU, can increase the area coverage of base station, improve the flexibility ratio of networking, can reduce the city machine room of operator greatly and select difficulty, reduce engineering construction and maintenance difficulties simultaneously.For present TD-SCDMA and WCDMA system, because this method is relatively more novel, and also exists some technological difficulties in realization, class such as the requirement of cascade clock performance, the problems such as processing that the storage of signaling is transmitted.The cascade content of RRU comprises two aspects, and the one, the cascade of IQ data, another aspect is the cascade of signaling.Present also good without comparison signaling cascade method.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of signaling cascade for radio frequency zooming unit.
In order to solve the problems of the technologies described above, the present invention proposes a kind of method of signaling cascade for radio frequency zooming unit, baseband pool unit BBU and a plurality of radio frequency remote unit RRU cascade, signaling arrives RRU or arrives the RRU of subordinate from RRU at the corresponding levels from BBU and is called descending, signaling arrives BBU or reaches higher level RRU from RRU at the corresponding levels from RRU and is called up, it is characterized in that, comprise following aspect:
(a) signaling between BBU and RRU, RRU and the RRU is according to the form framing of appointment;
(b) extraction of downlink signaling and forwarding:
After RRU at the corresponding levels receives downlink data frame, from Frame, extract signaling at the corresponding levels according to the frame format of appointment;
RRU at the corresponding levels handles the back forwarding with the signaling related with RRU cascade position at the corresponding levels, and all the other signalings are directly transmitted;
(c) insertion of up signaling and forwarding:
When up, adopt time-sharing multiplexing method to carry out the insertion and the forwarding of signaling, RRU at the corresponding levels sends signaling at the corresponding levels when belonging to the frame of the corresponding levels, when the frame of the non-corresponding levels, transmits the signaling that the RRU of subordinate sends over.
Further, said method also can have following characteristics, in the described step (a), and the fixed-site of signaling in every frame.
Further, said method also can have following characteristics, and during framing, the original position of the every frame of described Frame comprises frame head, in the described step (b), extracts signaling calculate the position of signaling according to frame head after.
Further, said method also can have following characteristics, and described signaling comprises RRU dedicated signaling and shared signaling, and shared signaling is used jointly for all RRU, and dedicated signaling uses separately for each RRU.
Further, said method also can have following characteristics, in the described step (b), is latched in the register for subsequent treatment behind the extraction dedicated signaling from downlink data frame.
Further, said method also can have following characteristics, described shared signaling encapsulates with the frame format of High-Level Data Link Control HDLC, in the described step (b), from the Frame after the conversion, extract the territory conversion of the laggard row clock of shared signaling at the corresponding levels, from being transformed into local clock with the road clock, parallel data is converted to the hdlc controller of sending among the RRU at the corresponding levels after the serial data to be handled, in the described step (c), the shared signaling of RRU at the corresponding levels is produced by hdlc controller, the HDLC data conversion of serial is become parallel data, carry out the conversion of clock zone then after, transmit again.
Further, said method also can have following characteristics, in the step (c), is kept in the register behind the dedicated signaling that the described RRU reception RRU of subordinate at the corresponding levels sends, and reads from register when needs are transmitted.
Further, said method also can have following characteristics, in the described step (c), is buffered in the memory after the shared signaling that the described RRU reception RRU of subordinate at the corresponding levels sends, and reads from memory when needs are transmitted.
Further, said method also can have following characteristics, the write address of described memory enables to begin to calculate generation from the input frame head of the RRU of subordinate light mouth with writing, and the address of reading of described memory begins to calculate generation with reading to enable from the output frame head that outputs to higher level RRU light mouth.
Further, said method also can have following characteristics, in the step (c), described RRU at the corresponding levels enables control by forwarding and carries out time-sharing multiplex, transmits when enabling when high corresponding frame at the corresponding levels, transmits to enable when low, during the frame of the corresponding non-corresponding levels, or transmit when enabling when low corresponding frame at the corresponding levels, transmit and enable when high, during the frame of the corresponding non-corresponding levels.
Further, said method also can have following characteristics, and described signaling also comprises the link dedicated signaling, and described RRU at the corresponding levels distinguishes signaling frame at the corresponding levels and subordinate's signaling frame by the link dedicated signaling.
Further; said method also can have following characteristics; produce the shared signaling of RRU at the corresponding levels by control signal CTS control hdlc controller; wherein; when forwarding enables frame into the corresponding non-corresponding levels of height, transmit when enabling when low corresponding frame at the corresponding levels, control signal CTS just becomes low level through a guard time after forwarding enables to become low level; before forwarding enabled to become high level, a guard time became high level in advance.
Adopt method of the present invention, realized the signaling forwarding of RRU cascade, can cascade up multistage RRU in the mode of chain by the method, be connected with BBU with optical fiber, realize the transmitting-receiving of signaling between RRU at different levels and the BBU, make BBU and convenient and reliable the linking together of RRU at different levels, finish the control and management of BBU RRU, and the reporting of the warning information of RRU and state information.
Description of drawings
Fig. 1 connects topological diagram for RRU cascade of the present invention;
Fig. 2 transmits the data flow direction schematic diagram for cascade of the present invention;
Fig. 3 transmits for signaling cascade of the present invention and enables the sequential chart with CTS;
Fig. 4 is for the shared signaling buffer memory RAM of subordinate of the present invention read/write address and read and write the sequential chart that enables;
Fig. 5 is the schematic diagram of the present invention's shared signaling at the corresponding levels and the shared signaling framing of subordinate.
Embodiment
Figure 1 shows that RRU cascade of the present invention connects topological diagram.
The present invention uses extensive Field Programmable Gate Array (FPGA) to realize the RRU cascade.Wherein, comprise FIFO, dual port RAM, string and modular converter, time-sharing multiplex module among the FPGA, register.
Cascade is transmitted and to be comprised both direction, and is promptly descending and up, descending be meant data flow from BBU to RRU or from RRU at the corresponding levels to back grade RRU, as shown in fig. 1 from RRU0 to RRU1; The up data flow that is meant from RRU to BBU or RRU from the RRU of back level to prime, as shown in Figure 1 from RRU1 to RRU0.The direction of uplink and downlink such as Fig. 2 dotted line are indicated.
In shown in the embodiment of the invention, the signaling between BBU and the RRU comprises following three classes:
1) shared signaling: all RRU use jointly on the link, encapsulate with the frame format of HDLC (High-Level Data Link Control), also can adopt other frame formats to encapsulate.
2) RRU dedicated signaling: the signaling that each RRU uses separately is used for RRU alarm, state and the transmission of signaling in real time.
3) link dedicated signaling: the signaling of optical fiber link special use is used for link maintenance and management.
Certainly the signaling between BBU and the RRU is not limited to above-mentioned three kinds, can also be that other are used for the signaling that BBU manages and controls RRU.
Transmit with regard to the cascade of down direction and up direction signaling respectively below and describe.
One, the extraction of downlink signaling and forwarding
1, the processing of down direction incoming signalling
Down direction, as shown in Figure 2, data flow by optical fiber from BBU to RRU or from RRU at the corresponding levels to back level RRU, after serial (serdes) chip is separated in process optical interface chip and serial, data flow enters FPGA, owing to there is the conversion of clock zone, promptly the data that receive from the light mouth will be from being transformed into local clock with road clock (light mouth clock recovered), so the data that receive must be carried out buffer memory through FIFO (push-up storage) earlier, be used for eliminating the deviation that phase-locked loop brings, the degree of depth of buffer memory FIFO decides according to the performance of phase-locked loop, can not be too big, can not be too little, too big can take too many FPGA resource and the time delay that increases descending forwarding, too little can cause data to be overflowed, cause the error code of transmission in the phase-locked loop fluctuation.According to the performance of clock and phase-locked loop, also have system that the FIFO degree of depth is determined in the requirement of transmitting time delay.In addition, the present invention is not limited to and uses FIFO to carry out the clock zone conversion, and other device or method that can reach the clock zone conversion also can be used.
2, the extraction of downlink signaling
Data between BBU and the RRU, between RRU and the RRU make up according to preassigned frame format.
In this example, the length of every frame is 10ms, and the position of signaling data (comprising dedicated signaling and shared signaling) in a frame is changeless, every frame circulation primary.
2.1 the extraction of descending dedicated signaling at the corresponding levels
The fixed number of dedicated signaling in every frame.
RRU for the corresponding levels, calculate the position of each dedicated signaling according to the frame head of descending input data frame, corresponding dedicated signaling is extracted, latch by register in corresponding position, CPU by RRU at the corresponding levels reads dedicated signaling then, and is correspondingly processed.Wherein, frame head is positioned at the original position of each Frame, is used for the beginning of the every frame of designation data frame, can be a specified byte.
2.2 the extraction of the shared signaling of the descending corresponding levels
The number of shared signaling in a frame is real-time change, and therefore, the processing mode of shared signaling is different from dedicated signaling.Shared signaling is with the transmission of packing of HDLC form in the present embodiment.
For shared signaling, calculate the position of each shared signaling according to the frame head of descending input data frame, after corresponding position extracts corresponding shared signaling, carry out the conversion (from being transformed into local clock) of clock zone through FIFO with the road clock, and become a parallel data transaction data of serial to be sent to the special pin of CPU, handle by the hdlc controller of CPU.
Shared signaling also can be used the transmission of packing of other frame formats, extracts the back and handles by other frame formats.
3, the forwarding of downlink signaling
When downlink signaling was transmitted, the signaling relevant with the RRU cascade position must could be transmitted after treatment, and remaining signaling all directly is transmitted to subordinate.
For convenience of description, especially exemplified by the example explanation, defined two signaling bytes relevant in this example with cascade:
RRU ID (Remote Radio Unit sign): define RRU at different levels according to the RRU of pre-defined rule generation and the mailing address of the corresponding light mouth of BBU;
OAM ID (Operation Administration and Maintenance ID, Operations,Administration And Maintenance sign);
In the RRU side: when OAM ID is identical with this RRU ID, just can send up signaling data;
In the BBU side: produce OAM ID, each frame (10ms) adds 1, and span is by software setting.
Except that RRU ID, the dedicated signaling of link and remaining RRU dedicated signaling directly are forwarded to subordinate, because RRU ID at different levels is different, therefore after RRU at the corresponding levels receives the RRUID that the higher level sends over, carry out add-one operation, produce and just can be forwarded to next stage after new RRU ID is inserted into corresponding position.
Two, the insertion of up signaling and forwarding
Up direction, data flow from RRU to BBU or from the RRU of subordinate to RRU at the corresponding levels.For signaling, every grade is all carried out time-sharing multiplex according to a frame, when belonging to the frame of the corresponding levels, just sends signaling at the corresponding levels; When the frame of the non-corresponding levels, transmit the signaling that subordinate sends over.
The differentiation of signaling frame at the corresponding levels and subordinate's signaling frame is judged according to the link dedicated signaling.In the present embodiment, can judge to have only ID according to following mode, be only signaling frame at the corresponding levels as OAM ID=RRU; When OAM ID ≠ RRU ID, be the signaling frame of subordinate.
Enable control by forwarding and reach time-sharing multiplex, promptly transmit and enable when high, during the frame of the corresponding non-corresponding levels frame of the corresponding subordinate (time), transmit and enable when low, during corresponding frame at the corresponding levels.Forwarding enables control will follow certain time sequence relation, as shown in Figure 3, transmits and enables to transmit the signaling that subordinate sends over when high; Forwarding enables to send signaling at the corresponding levels when low.In other embodiments, also can transmit and enable when high, during corresponding frame at the corresponding levels, send signaling at the corresponding levels, transmit and enable when low, during the frame of the corresponding non-corresponding levels, transmit the signaling that subordinate sends over.
1, the forwarding of the insertion of up dedicated signaling at the corresponding levels and up subordinate dedicated signaling
Because can there be certain time-delay deviation in the cause of cascade and forwarding, defining this time difference is toffset between the input and output frame head.Owing to there is toffset, the RRU dedicated signaling of subordinate and link dedicated signaling can not directly be put in the up link, can get off with register holds, read insertion and get final product when needs are transmitted.
2, the forwarding of the shared signaling of insertion and subordinate of the shared signaling of the up corresponding levels
For shared signaling, because data volume is bigger, and transmit in real time, same because toffset, for the data of subordinate and the correct framing of local data, must carry out buffer memory with dual port RAM (random asccess memory) to the shared signaling that subordinate comes, the degree of depth of storage RAM is the total bandwidth of all shared signalings in the frame.The write address of dual port RAM enables to begin to calculate generation from the input frame head of subordinate's light mouth with writing, and reads the address and read to enable to begin to calculate generation from the output frame head that outputs to higher level's light mouth, and sequential relationship as shown in Figure 4.
For the shared signaling of the corresponding levels, be that the transmission of HDLC enables the control by control signal CTS by the hdlc controller generation of CPU, transmit reliably in order to guarantee shared signaling, just crossing a segment protect after forwarding enables to low level, CTS becomes low level after the time; Before forwarding enabled to uprise level, the segment protect time became high level in advance, as shown in Figure 3.When CTS when low, hdlc controller begins to send data, because the HDLC data that CPU sends are serials, and clock rate is lower than the speed of cascade frame, therefore at first to become parallel data to the HDLC data conversion of serial, carry out the conversion of clock zone with a FIFO again, the shared signaling that local data after the conversion and subordinate come is enabled to send to the higher level after the control by forwarding, and the cascade of shared signaling is transmitted block diagram as shown in Figure 5.
Adopt method of the present invention, realized the signaling forwarding of RRU cascade, can cascade up multistage RRU in the mode of chain by the method, be connected with BBU with optical fiber, realize the transmitting-receiving of signaling between RRU at different levels and the BBU, make BBU and convenient and reliable the linking together of RRU at different levels, finish the control and management of BBU RRU, and the reporting of the warning information of RRU and state information.
Claims (14)
1. the method for a signaling cascade for radio frequency zooming unit, baseband pool unit BBU and a plurality of radio frequency remote unit RRU cascade, signaling arrives RRU or arrives the RRU of subordinate from RRU at the corresponding levels from BBU and is called descending, signaling arrives BBU or reaches higher level RRU from RRU at the corresponding levels from RRU and is called up, it is characterized in that, comprise following aspect:
(a) signaling between BBU and RRU, RRU and the RRU is according to the form framing of appointment;
(b) extraction of downlink signaling and forwarding:
After RRU at the corresponding levels receives downlink data frame, from Frame, extract signaling at the corresponding levels according to the frame format of appointment;
RRU at the corresponding levels handles the back forwarding with the signaling related with RRU cascade position at the corresponding levels, and all the other signalings are directly transmitted;
(c) insertion of up signaling and forwarding:
When up, adopt time-sharing multiplexing method to carry out the insertion and the forwarding of signaling, RRU at the corresponding levels sends signaling at the corresponding levels when belonging to the frame of the corresponding levels, when the frame of the non-corresponding levels, transmits the signaling that the RRU of subordinate sends over.
2. the method for claim 1 is characterized in that, in the described step (a), and the fixed-site of signaling in every frame.
3. method as claimed in claim 2 is characterized in that, during framing, the original position of the every frame of described Frame comprises frame head, in the described step (b), extracts signaling calculate the position of signaling according to frame head after.
4. as claim 1 or 2 or 3 described methods, it is characterized in that described signaling comprises RRU dedicated signaling and shared signaling, shared signaling is used jointly for all RRU, and dedicated signaling uses separately for each RRU.
5. method as claimed in claim 4 is characterized in that, in the described step (b), is latched in the register for subsequent treatment behind the extraction dedicated signaling from downlink data frame.
6. method as claimed in claim 4, it is characterized in that, described shared signaling encapsulates with the frame format of High-Level Data Link Control HDLC, in the described step (b), from the Frame after the conversion, extract the territory conversion of the laggard row clock of shared signaling at the corresponding levels, from being transformed into local clock with the road clock, parallel data is converted to the hdlc controller of sending among the RRU at the corresponding levels after the serial data to be handled, in the described step (c), the shared signaling of RRU at the corresponding levels is produced by hdlc controller, the HDLC data conversion of serial is become parallel data, carry out the conversion of clock zone then after, transmit again.
7. method as claimed in claim 4 is characterized in that, in the step (c), is kept in the register behind the dedicated signaling that the described RRU reception RRU of subordinate at the corresponding levels sends, and reads from register when needs are transmitted.
8. method as claimed in claim 4 is characterized in that, in the described step (c), is buffered in the memory after the shared signaling that the described RRU reception RRU of subordinate at the corresponding levels sends, and reads from memory when needs are transmitted.
9. method as claimed in claim 8, it is characterized in that, the write address of described memory enables to begin to calculate generation from the input frame head of the RRU of subordinate light mouth with writing, and the address of reading of described memory begins to calculate generation with reading to enable from the output frame head that outputs to higher level RRU light mouth.
10. the method for claim 1, it is characterized in that, in the step (c), described RRU at the corresponding levels enables control by forwarding and carries out time-sharing multiplex, transmits when enabling when high corresponding frame at the corresponding levels, transmits to enable when low, during the frame of the corresponding non-corresponding levels, or transmit when enabling when low corresponding frame at the corresponding levels, transmit and enable when high, during the frame of the corresponding non-corresponding levels.
11. method as claimed in claim 6, it is characterized in that, in the step (c), described RRU at the corresponding levels enables control by forwarding and carries out time-sharing multiplex, transmits when enabling when high corresponding frame at the corresponding levels, transmits to enable when low, during the frame of the corresponding non-corresponding levels, or transmit when enabling when low corresponding frame at the corresponding levels, transmit and enable when high, during the frame of the corresponding non-corresponding levels.
12. method as claimed in claim 4 is characterized in that, described signaling also comprises the link dedicated signaling, and described RRU at the corresponding levels distinguishes signaling frame at the corresponding levels and subordinate's signaling frame by the link dedicated signaling.
13. method as claimed in claim 10; it is characterized in that; produce the shared signaling of RRU at the corresponding levels by control signal CTS control hdlc controller; wherein; when forwarding enables frame into the corresponding non-corresponding levels of height, transmit when enabling when low corresponding frame at the corresponding levels, control signal CTS just becomes low level through a guard time after forwarding enables to become low level; before forwarding enabled to become high level, a guard time became high level in advance.
14. method as claimed in claim 11; it is characterized in that; produce the shared signaling of RRU at the corresponding levels by control signal CTS control hdlc controller; wherein; when forwarding enables frame into the corresponding non-corresponding levels of height, transmit when enabling when low corresponding frame at the corresponding levels, control signal CTS just becomes low level through a guard time after forwarding enables to become low level; before forwarding enabled to become high level, a guard time became high level in advance.
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| CN101707498B (en) * | 2009-10-20 | 2013-04-10 | 武汉虹信通信技术有限责任公司 | Device and method for realizing TD-SCDMA RRU multi-stage cascade function |
| CN101702838B (en) * | 2009-10-20 | 2011-11-30 | 武汉虹信通信技术有限责任公司 | TD-SCDMA RRU multistage cascaded quick start device and method |
| CN102215606B (en) * | 2010-04-02 | 2016-05-25 | 中兴通讯股份有限公司 | Jockey between Base Band Unit and radio frequency unit and method |
| CN102780599B (en) * | 2011-05-10 | 2015-04-01 | 上海中兴软件有限责任公司 | Ethernet data processing method of cascaded BBUs (Base Band Units) and BBUs of base station |
| CN103582186B (en) * | 2012-08-09 | 2018-05-01 | 中兴通讯股份有限公司 | The method and device of BBU interframe data interaction in a kind of wireless soft base station |
| CN103209185B (en) * | 2013-04-07 | 2016-06-29 | 大唐移动通信设备有限公司 | A kind of transmitting message at optical interface and device |
| CN106656410B (en) * | 2015-11-04 | 2020-12-22 | 中兴通讯股份有限公司 | Method and device for sending data frame and baseband board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1431833A (en) * | 2003-01-16 | 2003-07-23 | 上海交通大学 | Signaling cascading method of exchange connection in automatic exchange optic/transport network |
| CN101035350A (en) * | 2007-04-18 | 2007-09-12 | 中兴通讯股份有限公司 | Method for the base band unit to reset the multi-level remote RF unit |
| CN101072419A (en) * | 2007-04-11 | 2007-11-14 | 中兴通讯股份有限公司 | Method for configuring initial information of multi-stage far-end radio frequency unit via control word |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1431833A (en) * | 2003-01-16 | 2003-07-23 | 上海交通大学 | Signaling cascading method of exchange connection in automatic exchange optic/transport network |
| CN101072419A (en) * | 2007-04-11 | 2007-11-14 | 中兴通讯股份有限公司 | Method for configuring initial information of multi-stage far-end radio frequency unit via control word |
| CN101035350A (en) * | 2007-04-18 | 2007-09-12 | 中兴通讯股份有限公司 | Method for the base band unit to reset the multi-level remote RF unit |
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