CN105634566A - Scalable distributed antenna system and processing method - Google Patents
Scalable distributed antenna system and processing method Download PDFInfo
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- CN105634566A CN105634566A CN201410612841.8A CN201410612841A CN105634566A CN 105634566 A CN105634566 A CN 105634566A CN 201410612841 A CN201410612841 A CN 201410612841A CN 105634566 A CN105634566 A CN 105634566A
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Abstract
The application discloses a scalable distributed antenna system. The system comprises a baseband unit (BBU) and the number of N remote radio units (RRUs) connected with the BBU respectively through interfaces. The BBU is used for receiving the amount of measurement from the number of N RRUs, comparing the amount of measurement according to certain criteria, selecting the number of M RRUs therefrom, and transmitting selection information of the RRUs to all the RRUs through the interfaces; and for receiving signal data of the RRUs, and carrying combination processing only for signal data from the number of M RRUs. Each RRU is used for measuring uplink receiving signals periodically and feeding back the amount of measurement to the BBU through the interface; and for determining whether the RRU itself belongs to the selected RRUs according to the selection information from the RRUs, if so, transmitting complete signal data to the BBU, and not transmitting signal data otherwise.
Description
Technical field
The application relates to mobile communication technology field, particularly relates to a kind of extendible distributing antenna system and processing method.
Background technology
In high-speed railways, owing to the rapid movement of high ferro causes community switching frequently, cutting off rate increases. In order to solve the problem of frequent switching cell, high ferro communication system is generally adopted the transmission means of distributing antenna system. Distributing antenna system realizes multiple cell typically via the network structure adopting baseband processing unit (BBU)+Remote Radio Unit (RRU) and merges, one BBU is with multiple RRU, extend the coverage of single subdistrict, such that it is able to the problem solving frequent switching cell.
Fig. 1 gives the structural representation of distributing antenna system of the prior art.
Assuming that adopt standard IR interface between BBU and RRU, IR interface rate is up to 10Gbps. Conventional implementation 10GbpsIR interface can process the 20MHz community of 8 antennas. In the distributed schemes of BBU+RRU, if a BBU connects 4 twin-channel RRU, then the transmitted data amount of BBU and RRU is close to the theoretical bandwidth of IR interface, and this directly limit the quantity of the connected RRU of BBU in distributed system. Along with the development to more high bandwidth and the distributed system of more stages in the future, the distributed system based on BBU+RRU is proposed higher challenge.
Summary of the invention
This application provides a kind of extendible distributing antenna system and processing method so that a BBU can connect more RRU, expand cell coverage area.
The embodiment of the present application provides a kind of extendible distributing antenna system, and this system includes: a baseband processing unit BBU and the N number of radio frequency remote unit RRU being connected respectively through interface with this BBU;
Described BBU, for receiving the measuring amount from described N number of RRU, selects M RRU therein by measuring amount described in certain comparison between the standards, by interface, the selection information of RRU is passed to all of RRU; Receive the signal data of RRU, only the signal data from M selected RRU is merged process;
Described RRU, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface; Judge self to be whether selected RRU according to the selection information from RRU, if so, to the signal data that BBU transmission is complete, otherwise do not transmit signal data.
It is preferred that described BBU includes:
Measuring amount receiver module, for receiving the measuring amount from described N number of RRU;
Select module, select, for relatively described measuring amount, M the RRU that wherein signal is stronger, the selection information of RRU is passed to all of RRU by interface;
Signal processing module, for receiving the signal data of RRU, only merges process to the signal data from M selected RRU.
It is preferred that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal; Described selection module is used for:
The peak value size of the channel impulse response of each RRU is ranked up, from peak-peak, selects M RRU; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
It is preferred that described RRU includes:
Measurement module, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface;
Judge module, for judging self to be whether selected RRU according to from the selection information of RRU, if so, enables signal transmission module, does not otherwise enable signal transmission module;
Signal transmission module, for the signal data complete to BBU transmission.
It is preferred that described measurement module physically based deformation Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH or measuring reference signals SRS measurement.
It is preferred that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal.
The embodiment of the present application additionally provides a kind of method that realizes of extendible distributing antenna system, and the method is realized by foregoing extendible distributing antenna system, comprises the steps:
N number of RRU that A, BBU connect, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface;
B, BBU receive the measuring amount from described N number of RRU, select M RRU therein by relatively described measuring amount, by interface, the selection information of RRU is passed to all of RRU;
Judge self to be whether selected RRU according to from the selection information of RRU described in C, RRU, if so, transmit complete signal data to BBU, otherwise do not transmit signal data;
D, BBU receive the signal data of RRU, only the signal data from M selected RRU are merged process.
It is preferred that be measured as physically based deformation Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH or measuring reference signals SRS measurement described in step A.
It is preferred that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal.
It is preferred that described in step B by measuring amount selection M RRU therein described in certain comparison between the standards be: the peak value size of the channel impulse response of each RRU is ranked up, selects M RRU from peak-peak; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
As can be seen from the above technical solutions, the selection of RRU in distributed system can be realized by certain Signalling exchange, such that it is able to avoid substantial amounts of data between multiple RRU and BBU to exchange problem,
Accompanying drawing explanation
Fig. 1 is the structural representation of distributing antenna system of the prior art;
The distributing antenna system schematic diagram that Fig. 2 provides for the embodiment of the present application;
The handling process schematic diagram of the scalable distributed antenna system that Fig. 3 provides for the application specific embodiment.
Detailed description of the invention
For making the know-why of technical scheme, feature and technique effect clearly, below in conjunction with specific embodiment, technical scheme is described in detail.
Being illustrated in figure 2 the distributing antenna system schematic diagram that the embodiment of the present application provides, each BBU connects multiple RRU, adopts the mode of many RRU cell combining to carry out MPS process, it is possible to expand the coverage distance of single subdistrict. The embodiment of the present application also proposed the distributed transmission scheme of a kind of RRU extension, and each BBU can connect N number of RRU and form a community, adopts BBU dynamically to select the mode of wherein M RRU to carry out MPS process. M, N are natural number and M < N.
Connecting 12 RRU with 1 BBU in example in detail below, synchronization only selects wherein 4 RRU transmission data instances to illustrate.
Fig. 3 illustrates the handling process of the scalable distributed antenna system that the application specific embodiment provides, including:
Step 301: when community is set up, BBU is delivered to, user's configuration parameter etc., the N number of RRU connected by interface.
Step 302: uplink receiving signal is periodically measured by N number of RRU that described BBU connects.
According to another embodiment of the application, described measurement can physically based deformation Uplink Shared Channel (PUSCH) or Physical Uplink Control Channel (PUCCH) or measuring reference signals (SRS, SoundingReferenceSignal) measurement; Measuring amount can be the peak value of channel impulse response, it is also possible to be the correlation peak receiving signal with local reference signal.
Step 303:N RRU feeds back to BBU measuring amount by interface.
Step 304:BBU collects N number of RRU measuring amount reported, and relatively described measuring amount selects M the RRU that wherein signal is stronger.
Another embodiment according to the application, described criterion may is that the peak value size of the channel impulse response to each RRU is ranked up, and selects M RRU from peak-peak; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
Step 305:BBU passes to all of RRU the selection information of RRU by interface.
Step 306: M selected RRU transmits complete signal data to BBU. Not selected N-M RRU does not then send signal.
Step 307: within each cycle, BBU receives the signal data of RRU, only merges process to from M the selected RRU signal sent.
Step 309: judge whether also within a cycle, if so, returns step 307, otherwise returns step 302.
Above flow process is transmitted as example with up direction and illustrates. Transmission in the downstream direction is similar, and BBU only transmits signal data to M selected RRU.
The embodiment of the present application additionally provides a kind of extendible distributing antenna system, it is characterised in that this system includes: a BBU and the N number of RRU being connected respectively through interface with this BBU;
Described BBU, for receiving the measuring amount from described N number of RRU, selects M RRU therein by measuring amount described in certain comparison between the standards, by interface, the selection information of RRU is passed to all of RRU; Receive the signal data of RRU, only the signal data from M selected RRU is merged process;
Described RRU, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface; Judge self to be whether selected RRU according to the selection information from RRU, if so, to the signal data that BBU transmission is complete, otherwise do not transmit signal data.
Another embodiment according to the application, described BBU includes:
Measuring amount receiver module, for receiving the measuring amount from described N number of RRU;
Select module, select, for relatively described measuring amount, M the RRU that wherein signal is stronger, the selection information of RRU is passed to all of RRU by interface;
Signal processing module, for receiving the signal data of RRU, only merges process to the signal data from M selected RRU.
It is preferred that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal; Described selection module is used for:
The peak value size of the channel impulse response of each RRU is ranked up, from peak-peak, selects M RRU; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
Another embodiment according to the application, described RRU includes:
Measurement module, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface;
Judge module, for judging self to be whether selected RRU according to from the selection information of RRU, if so, enables signal transmission module, does not otherwise enable signal transmission module;
Signal transmission module, for the signal data complete to BBU transmission.
It is preferred that described measurement module physically based deformation Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH or measuring reference signals SRS measurement.
It is preferred that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal.
The foregoing is only the preferred embodiment of the application; not in order to limit the protection domain of the application; within all spirit in technical scheme and principle, any amendment of making, equivalent replacements, improvement etc., should be included within the scope that the application protects.
Claims (10)
1. an extendible distributing antenna system, it is characterised in that this system includes: a baseband processing unit BBU and the N number of radio frequency remote unit RRU being connected respectively through interface with this BBU;
Described BBU, for receiving the measuring amount from described N number of RRU, selects M RRU therein by measuring amount described in certain comparison between the standards, by interface, the selection information of RRU is passed to all of RRU; Receive the signal data of RRU, only the signal data from M selected RRU is merged process;
Described RRU, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface; Judge self to be whether selected RRU according to the selection information from RRU, if so, to the signal data that BBU transmission is complete, otherwise do not transmit signal data.
2. system according to claim 1, it is characterised in that described BBU includes:
Measuring amount receiver module, for receiving the measuring amount from described N number of RRU;
Select module, select, for relatively described measuring amount, M the RRU that wherein signal is stronger, the selection information of RRU is passed to all of RRU by interface;
Signal processing module, for receiving the signal data of RRU, only merges process to the signal data from M selected RRU.
3. system according to claim 2, it is characterised in that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal; Described selection module is used for:
The peak value size of the channel impulse response of each RRU is ranked up, from peak-peak, selects M RRU; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
4. system according to claim 1, it is characterised in that described RRU includes:
Measurement module, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface;
Judge module, for judging self to be whether selected RRU according to from the selection information of RRU, if so, enables signal transmission module, does not otherwise enable signal transmission module;
Signal transmission module, for the signal data complete to BBU transmission.
5. system according to claim 4, it is characterised in that described measurement module physically based deformation Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH or measuring reference signals SRS measurement.
6. system according to claim 4, it is characterised in that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal.
7. an extendible distributing antenna system realize method, it is characterised in that the method is realized by extendible distributing antenna system as claimed in claim 1, comprises the steps:
N number of RRU that A, BBU connect, for periodically uplink receiving signal being measured, feeds back to BBU measuring amount by interface;
B, BBU receive the measuring amount from described N number of RRU, select M RRU therein by relatively described measuring amount, by interface, the selection information of RRU is passed to all of RRU;
Judge self to be whether selected RRU according to from the selection information of RRU described in C, RRU, if so, transmit complete signal data to BBU, otherwise do not transmit signal data;
D, BBU receive the signal data of RRU, only the signal data from M selected RRU are merged process.
8. method according to claim 7, it is characterised in that be measured as physically based deformation Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH or measuring reference signals SRS measurement described in step A.
9. method according to claim 7, it is characterised in that described measuring amount is the peak value of channel impulse response, or receive the correlation peak of signal and local reference signal.
10. method according to claim 9, it is characterized in that, described in step B by measuring amount selection M RRU therein described in certain comparison between the standards it is: the peak value size of the channel impulse response of each RRU is ranked up, from peak-peak, selects M RRU; Or the correlation peak receiving signal and local reference signal of each RRU is sorted from big to small, from maximum correlation peaks, selects M RRU.
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| WO2020192363A1 (en) * | 2019-03-25 | 2020-10-01 | 华为技术有限公司 | Communication method and device |
| CN113853027A (en) * | 2021-09-15 | 2021-12-28 | 深圳市佳贤通信设备有限公司 | Method and system for improving performance of option6 mobility scene system |
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| CN103001686A (en) * | 2011-09-16 | 2013-03-27 | 普天信息技术研究院有限公司 | Uplink receiving method for distributed antenna system |
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Application publication date: 20160601 |